mirror of
https://github.com/juce-framework/JUCE.git
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2271 lines
84 KiB
C++
2271 lines
84 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library - "Jules' Utility Class Extensions"
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Copyright 2004-11 by Raw Material Software Ltd.
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------------------------------------------------------------------------------
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JUCE can be redistributed and/or modified under the terms of the GNU General
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Public License (Version 2), as published by the Free Software Foundation.
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A copy of the license is included in the JUCE distribution, or can be found
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online at www.gnu.org/licenses.
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JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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------------------------------------------------------------------------------
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To release a closed-source product which uses JUCE, commercial licenses are
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available: visit www.rawmaterialsoftware.com/juce for more information.
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==============================================================================
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*/
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namespace OpenGLRendering
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{
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struct Target
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{
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Target (OpenGLContext& c, GLuint frameBufferID_, int width, int height) noexcept
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: context (c), frameBufferID (frameBufferID_), bounds (width, height)
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{}
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Target (OpenGLContext& c, OpenGLFrameBuffer& fb, const Point<int>& origin) noexcept
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: context (c), frameBufferID (fb.getFrameBufferID()),
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bounds (origin.x, origin.y, fb.getWidth(), fb.getHeight())
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{
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jassert (frameBufferID != 0); // trying to render into an uninitialised framebuffer object.
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}
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Target (const Target& other) noexcept
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: context (other.context), frameBufferID (other.frameBufferID), bounds (other.bounds)
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{}
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Target& operator= (const Target& other) noexcept
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{
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frameBufferID = other.frameBufferID;
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bounds = other.bounds;
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return *this;
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}
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void makeActive() const noexcept
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{
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#if JUCE_WINDOWS
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if (context.extensions.glBindFramebuffer != nullptr)
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#endif
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context.extensions.glBindFramebuffer (GL_FRAMEBUFFER, frameBufferID);
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glViewport (0, 0, bounds.getWidth(), bounds.getHeight());
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glDisable (GL_DEPTH_TEST);
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}
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OpenGLContext& context;
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GLuint frameBufferID;
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Rectangle<int> bounds;
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};
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#if JUCE_USE_OPENGL_SHADERS
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//==============================================================================
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class PositionedTexture
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{
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public:
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PositionedTexture (OpenGLTexture& texture, const EdgeTable& et, const Rectangle<int>& clip_)
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: clip (clip_.getIntersection (et.getMaximumBounds()))
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{
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if (clip.contains (et.getMaximumBounds()))
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{
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createMap (texture, et);
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}
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else
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{
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EdgeTable et2 (clip);
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et2.clipToEdgeTable (et);
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createMap (texture, et2);
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}
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}
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PositionedTexture (GLuint textureID_, const Rectangle<int> area_, const Rectangle<int> clip_) noexcept
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: textureID (textureID_), area (area_), clip (clip_)
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{}
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GLuint textureID;
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Rectangle<int> area, clip;
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private:
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void createMap (OpenGLTexture& texture, const EdgeTable& et)
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{
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EdgeTableAlphaMap alphaMap (et);
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texture.loadAlpha (alphaMap.data, alphaMap.area.getWidth(), alphaMap.area.getHeight());
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textureID = texture.getTextureID();
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area = alphaMap.area;
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}
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struct EdgeTableAlphaMap
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{
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EdgeTableAlphaMap (const EdgeTable& et)
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: area (et.getMaximumBounds().withSize (nextPowerOfTwo (et.getMaximumBounds().getWidth()),
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nextPowerOfTwo (et.getMaximumBounds().getHeight())))
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{
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data.calloc (area.getWidth() * area.getHeight());
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et.iterate (*this);
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}
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inline void setEdgeTableYPos (const int y) noexcept
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{
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currentLine = data + (area.getBottom() - 1 - y) * area.getWidth() - area.getX();
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}
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inline void handleEdgeTablePixel (const int x, const int alphaLevel) const noexcept
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{
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currentLine[x] = (uint8) alphaLevel;
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}
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inline void handleEdgeTablePixelFull (const int x) const noexcept
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{
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currentLine[x] = 255;
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}
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inline void handleEdgeTableLine (int x, int width, const int alphaLevel) const noexcept
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{
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memset (currentLine + x, (uint8) alphaLevel, width);
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}
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inline void handleEdgeTableLineFull (int x, int width) const noexcept
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{
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memset (currentLine + x, 255, width);
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}
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HeapBlock<uint8> data;
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const Rectangle<int> area;
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private:
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uint8* currentLine;
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JUCE_DECLARE_NON_COPYABLE (EdgeTableAlphaMap)
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};
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};
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//==============================================================================
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class ShaderPrograms : public ReferenceCountedObject
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{
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public:
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ShaderPrograms (OpenGLContext& context)
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: solidColourProgram (context),
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solidColourMasked (context),
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radialGradient (context),
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radialGradientMasked (context),
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linearGradient1 (context),
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linearGradient1Masked (context),
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linearGradient2 (context),
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linearGradient2Masked (context),
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image (context),
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imageMasked (context),
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tiledImage (context),
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tiledImageMasked (context),
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copyTexture (context),
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maskTexture (context)
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{}
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typedef ReferenceCountedObjectPtr<ShaderPrograms> Ptr;
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//==============================================================================
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struct ShaderProgramHolder
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{
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ShaderProgramHolder (OpenGLContext& context, const char* fragmentShader)
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: program (context)
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{
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JUCE_CHECK_OPENGL_ERROR
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program.addShader ("attribute vec2 position;"
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"attribute vec4 colour;"
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"uniform vec4 screenBounds;"
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"varying " JUCE_MEDIUMP " vec4 frontColour;"
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"varying " JUCE_HIGHP " vec2 pixelPos;"
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"void main()"
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"{"
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" frontColour = colour;"
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" vec2 adjustedPos = position - screenBounds.xy;"
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" pixelPos = adjustedPos;"
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" vec2 scaledPos = adjustedPos / screenBounds.zw;"
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" gl_Position = vec4 (scaledPos.x - 1.0, 1.0 - scaledPos.y, 0, 1.0);"
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"}", GL_VERTEX_SHADER);
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program.addShader (fragmentShader, GL_FRAGMENT_SHADER);
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program.link();
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JUCE_CHECK_OPENGL_ERROR
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}
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OpenGLShaderProgram program;
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};
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struct ShaderBase : public ShaderProgramHolder
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{
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ShaderBase (OpenGLContext& context, const char* fragmentShader)
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: ShaderProgramHolder (context, fragmentShader),
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positionAttribute (program, "position"),
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colourAttribute (program, "colour"),
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screenBounds (program, "screenBounds")
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{}
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void set2DBounds (const Rectangle<float>& bounds)
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{
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screenBounds.set (bounds.getX(), bounds.getY(), 0.5f * bounds.getWidth(), 0.5f * bounds.getHeight());
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}
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void bindAttributes (OpenGLContext& context)
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{
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context.extensions.glVertexAttribPointer (positionAttribute.attributeID, 2, GL_SHORT, GL_FALSE, 8, (void*) 0);
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context.extensions.glVertexAttribPointer (colourAttribute.attributeID, 4, GL_UNSIGNED_BYTE, GL_TRUE, 8, (void*) 4);
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context.extensions.glEnableVertexAttribArray (positionAttribute.attributeID);
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context.extensions.glEnableVertexAttribArray (colourAttribute.attributeID);
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}
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void unbindAttributes (OpenGLContext& context)
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{
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context.extensions.glDisableVertexAttribArray (positionAttribute.attributeID);
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context.extensions.glDisableVertexAttribArray (colourAttribute.attributeID);
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}
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OpenGLShaderProgram::Attribute positionAttribute, colourAttribute;
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private:
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OpenGLShaderProgram::Uniform screenBounds;
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};
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struct MaskedShaderParams
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{
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MaskedShaderParams (OpenGLShaderProgram& program)
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: maskTexture (program, "maskTexture"),
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maskBounds (program, "maskBounds")
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{}
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void setBounds (const Rectangle<int>& area, const Target& target, const GLint textureIndex) const
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{
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maskTexture.set (textureIndex);
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maskBounds.set (area.getX() - target.bounds.getX(),
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area.getY() - target.bounds.getY(),
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area.getWidth(), area.getHeight());
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}
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OpenGLShaderProgram::Uniform maskTexture, maskBounds;
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};
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//==============================================================================
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#define JUCE_DECLARE_VARYING_COLOUR "varying " JUCE_MEDIUMP " vec4 frontColour;"
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#define JUCE_DECLARE_VARYING_PIXELPOS "varying " JUCE_HIGHP " vec2 pixelPos;"
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struct SolidColourProgram : public ShaderBase
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{
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SolidColourProgram (OpenGLContext& context)
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: ShaderBase (context, JUCE_DECLARE_VARYING_COLOUR
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"void main() { gl_FragColor = frontColour; }")
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{}
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};
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#if JUCE_ANDROID
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#define JUCE_DECLARE_SWIZZLE_FUNCTION "\n" JUCE_MEDIUMP " vec4 swizzleRGBOrder (in " JUCE_MEDIUMP " vec4 c) { return vec4 (c.b, c.g, c.r, c.a); }\n"
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#else
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#define JUCE_DECLARE_SWIZZLE_FUNCTION "\n" JUCE_MEDIUMP " vec4 swizzleRGBOrder (in " JUCE_MEDIUMP " vec4 c) { return c; }\n"
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#endif
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#define JUCE_DECLARE_MASK_UNIFORMS "uniform sampler2D maskTexture;" \
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"uniform ivec4 maskBounds;"
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#define JUCE_FRAGCOORD_TO_MASK_POS "vec2 ((pixelPos.x - float (maskBounds.x)) / float (maskBounds.z)," \
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"1.0 - (pixelPos.y - float (maskBounds.y)) / float (maskBounds.w))"
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#define JUCE_GET_MASK_ALPHA "texture2D (maskTexture, " JUCE_FRAGCOORD_TO_MASK_POS ").a"
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struct SolidColourMaskedProgram : public ShaderBase
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{
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SolidColourMaskedProgram (OpenGLContext& context)
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: ShaderBase (context,
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JUCE_DECLARE_MASK_UNIFORMS JUCE_DECLARE_VARYING_COLOUR JUCE_DECLARE_VARYING_PIXELPOS
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"void main() {"
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"gl_FragColor = frontColour * " JUCE_GET_MASK_ALPHA ";"
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"}"),
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maskParams (program)
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{}
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MaskedShaderParams maskParams;
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};
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//==============================================================================
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struct RadialGradientParams
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{
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RadialGradientParams (OpenGLShaderProgram& program)
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: gradientTexture (program, "gradientTexture"),
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matrix (program, "matrix")
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{}
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void setMatrix (const Point<float>& p1, const Point<float>& p2, const Point<float>& p3)
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{
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const AffineTransform t (AffineTransform::fromTargetPoints (p1.x, p1.y, 0.0f, 0.0f,
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p2.x, p2.y, 1.0f, 0.0f,
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p3.x, p3.y, 0.0f, 1.0f));
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const GLfloat m[] = { t.mat00, t.mat01, t.mat02, t.mat10, t.mat11, t.mat12 };
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matrix.set (m, 6);
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}
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OpenGLShaderProgram::Uniform gradientTexture, matrix;
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};
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#define JUCE_DECLARE_MATRIX_UNIFORM "uniform " JUCE_HIGHP " float matrix[6];"
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#define JUCE_DECLARE_RADIAL_UNIFORMS "uniform sampler2D gradientTexture;" JUCE_DECLARE_MATRIX_UNIFORM
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#define JUCE_MATRIX_TIMES_FRAGCOORD "(mat2 (matrix[0], matrix[3], matrix[1], matrix[4]) * pixelPos" \
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" + vec2 (matrix[2], matrix[5]))"
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#define JUCE_GET_TEXTURE_COLOUR "(frontColour.a * swizzleRGBOrder (texture2D (gradientTexture, vec2 (gradientPos, 0.5))))"
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struct RadialGradientProgram : public ShaderBase
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{
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RadialGradientProgram (OpenGLContext& context)
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: ShaderBase (context, JUCE_DECLARE_VARYING_PIXELPOS
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JUCE_DECLARE_RADIAL_UNIFORMS JUCE_DECLARE_VARYING_COLOUR JUCE_DECLARE_SWIZZLE_FUNCTION
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"void main()"
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"{"
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JUCE_MEDIUMP " float gradientPos = length (" JUCE_MATRIX_TIMES_FRAGCOORD ");"
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"gl_FragColor = " JUCE_GET_TEXTURE_COLOUR ";"
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"}"),
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gradientParams (program)
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{}
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RadialGradientParams gradientParams;
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};
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struct RadialGradientMaskedProgram : public ShaderBase
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{
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RadialGradientMaskedProgram (OpenGLContext& context)
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: ShaderBase (context, JUCE_DECLARE_VARYING_PIXELPOS
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JUCE_DECLARE_RADIAL_UNIFORMS JUCE_DECLARE_VARYING_COLOUR
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JUCE_DECLARE_MASK_UNIFORMS JUCE_DECLARE_SWIZZLE_FUNCTION
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"void main()"
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"{"
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JUCE_MEDIUMP " float gradientPos = length (" JUCE_MATRIX_TIMES_FRAGCOORD ");"
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"gl_FragColor = " JUCE_GET_TEXTURE_COLOUR " * " JUCE_GET_MASK_ALPHA ";"
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"}"),
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gradientParams (program),
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maskParams (program)
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{}
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RadialGradientParams gradientParams;
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MaskedShaderParams maskParams;
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};
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//==============================================================================
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struct LinearGradientParams
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{
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LinearGradientParams (OpenGLShaderProgram& program)
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: gradientTexture (program, "gradientTexture"),
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gradientInfo (program, "gradientInfo")
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{}
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OpenGLShaderProgram::Uniform gradientTexture, gradientInfo;
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};
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#define JUCE_DECLARE_LINEAR_UNIFORMS "uniform sampler2D gradientTexture;" \
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"uniform " JUCE_MEDIUMP " vec4 gradientInfo;" \
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JUCE_DECLARE_VARYING_COLOUR JUCE_DECLARE_VARYING_PIXELPOS
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#define JUCE_CALC_LINEAR_GRAD_POS1 JUCE_MEDIUMP " float gradientPos = (pixelPos.y - (gradientInfo.y + (gradientInfo.z * (pixelPos.x - gradientInfo.x)))) / gradientInfo.w;"
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#define JUCE_CALC_LINEAR_GRAD_POS2 JUCE_MEDIUMP " float gradientPos = (pixelPos.x - (gradientInfo.x + (gradientInfo.z * (pixelPos.y - gradientInfo.y)))) / gradientInfo.w;"
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struct LinearGradient1Program : public ShaderBase
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{
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LinearGradient1Program (OpenGLContext& context)
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: ShaderBase (context, JUCE_DECLARE_LINEAR_UNIFORMS // gradientInfo: x = x1, y = y1, z = (y2 - y1) / (x2 - x1), w = length
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JUCE_DECLARE_SWIZZLE_FUNCTION
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"void main()"
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"{"
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JUCE_CALC_LINEAR_GRAD_POS1
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"gl_FragColor = " JUCE_GET_TEXTURE_COLOUR ";"
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"}"),
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gradientParams (program)
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{}
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LinearGradientParams gradientParams;
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};
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struct LinearGradient1MaskedProgram : public ShaderBase
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{
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LinearGradient1MaskedProgram (OpenGLContext& context)
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: ShaderBase (context, JUCE_DECLARE_LINEAR_UNIFORMS // gradientInfo: x = x1, y = y1, z = (y2 - y1) / (x2 - x1), w = length
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JUCE_DECLARE_MASK_UNIFORMS JUCE_DECLARE_SWIZZLE_FUNCTION
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"void main()"
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"{"
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JUCE_CALC_LINEAR_GRAD_POS1
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"gl_FragColor = " JUCE_GET_TEXTURE_COLOUR " * " JUCE_GET_MASK_ALPHA ";"
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"}"),
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gradientParams (program),
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maskParams (program)
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{}
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LinearGradientParams gradientParams;
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MaskedShaderParams maskParams;
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};
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struct LinearGradient2Program : public ShaderBase
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{
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LinearGradient2Program (OpenGLContext& context)
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: ShaderBase (context, JUCE_DECLARE_LINEAR_UNIFORMS // gradientInfo: x = x1, y = y1, z = (x2 - x1) / (y2 - y1), y = y1, w = length
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JUCE_DECLARE_SWIZZLE_FUNCTION
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"void main()"
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"{"
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JUCE_CALC_LINEAR_GRAD_POS2
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"gl_FragColor = " JUCE_GET_TEXTURE_COLOUR ";"
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"}"),
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gradientParams (program)
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{}
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LinearGradientParams gradientParams;
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};
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struct LinearGradient2MaskedProgram : public ShaderBase
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{
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LinearGradient2MaskedProgram (OpenGLContext& context)
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: ShaderBase (context, JUCE_DECLARE_LINEAR_UNIFORMS // gradientInfo: x = x1, y = y1, z = (x2 - x1) / (y2 - y1), y = y1, w = length
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JUCE_DECLARE_MASK_UNIFORMS JUCE_DECLARE_SWIZZLE_FUNCTION
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"void main()"
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"{"
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JUCE_CALC_LINEAR_GRAD_POS2
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"gl_FragColor = " JUCE_GET_TEXTURE_COLOUR " * " JUCE_GET_MASK_ALPHA ";"
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"}"),
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gradientParams (program),
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maskParams (program)
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{}
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LinearGradientParams gradientParams;
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MaskedShaderParams maskParams;
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};
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//==============================================================================
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struct ImageParams
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{
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ImageParams (OpenGLShaderProgram& program)
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: imageTexture (program, "imageTexture"),
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matrix (program, "matrix"),
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imageLimits (program, "imageLimits")
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{}
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void setMatrix (const AffineTransform& trans,
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const int imageWidth, const int imageHeight,
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const float fullWidthProportion, const float fullHeightProportion,
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const float targetX, const float targetY) const
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{
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const AffineTransform t (trans.translated (-targetX, -targetY)
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.inverted().scaled (fullWidthProportion / imageWidth,
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fullHeightProportion / imageHeight));
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const GLfloat m[] = { t.mat00, t.mat01, t.mat02, t.mat10, t.mat11, t.mat12 };
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matrix.set (m, 6);
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const float halfPixelX = 0.5f / imageWidth;
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const float halfPixelY = 0.5f / imageHeight;
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imageLimits.set (halfPixelX, halfPixelY,
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fullWidthProportion - halfPixelX,
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fullHeightProportion - halfPixelY);
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}
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void setMatrix (const AffineTransform& trans, const OpenGLTextureFromImage& im,
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const float targetX, const float targetY) const
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{
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setMatrix (trans,
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im.imageWidth, im.imageHeight,
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im.fullWidthProportion, im.fullHeightProportion,
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targetX, targetY);
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}
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OpenGLShaderProgram::Uniform imageTexture, matrix, imageLimits;
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};
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#define JUCE_DECLARE_IMAGE_UNIFORMS "uniform sampler2D imageTexture;" \
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"uniform " JUCE_MEDIUMP " vec4 imageLimits;" \
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JUCE_DECLARE_MATRIX_UNIFORM JUCE_DECLARE_VARYING_COLOUR JUCE_DECLARE_VARYING_PIXELPOS
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#define JUCE_GET_IMAGE_PIXEL "swizzleRGBOrder (texture2D (imageTexture, vec2 (texturePos.x, 1.0 - texturePos.y)))"
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|
#define JUCE_CLAMP_TEXTURE_COORD JUCE_HIGHP " vec2 texturePos = clamp (" JUCE_MATRIX_TIMES_FRAGCOORD ", imageLimits.xy, imageLimits.zw);"
|
|
#define JUCE_MOD_TEXTURE_COORD JUCE_HIGHP " vec2 texturePos = clamp (mod (" JUCE_MATRIX_TIMES_FRAGCOORD ", imageLimits.zw + imageLimits.xy), imageLimits.xy, imageLimits.zw);"
|
|
|
|
struct ImageProgram : public ShaderBase
|
|
{
|
|
ImageProgram (OpenGLContext& context)
|
|
: ShaderBase (context, JUCE_DECLARE_IMAGE_UNIFORMS JUCE_DECLARE_SWIZZLE_FUNCTION
|
|
"void main()"
|
|
"{"
|
|
JUCE_CLAMP_TEXTURE_COORD
|
|
"gl_FragColor = frontColour.a * " JUCE_GET_IMAGE_PIXEL ";"
|
|
"}"),
|
|
imageParams (program)
|
|
{}
|
|
|
|
ImageParams imageParams;
|
|
};
|
|
|
|
struct ImageMaskedProgram : public ShaderBase
|
|
{
|
|
ImageMaskedProgram (OpenGLContext& context)
|
|
: ShaderBase (context, JUCE_DECLARE_IMAGE_UNIFORMS JUCE_DECLARE_MASK_UNIFORMS JUCE_DECLARE_SWIZZLE_FUNCTION
|
|
"void main()"
|
|
"{"
|
|
JUCE_CLAMP_TEXTURE_COORD
|
|
"gl_FragColor = frontColour.a * " JUCE_GET_IMAGE_PIXEL " * " JUCE_GET_MASK_ALPHA ";"
|
|
"}"),
|
|
imageParams (program),
|
|
maskParams (program)
|
|
{}
|
|
|
|
ImageParams imageParams;
|
|
MaskedShaderParams maskParams;
|
|
};
|
|
|
|
struct TiledImageProgram : public ShaderBase
|
|
{
|
|
TiledImageProgram (OpenGLContext& context)
|
|
: ShaderBase (context, JUCE_DECLARE_IMAGE_UNIFORMS JUCE_DECLARE_SWIZZLE_FUNCTION
|
|
"void main()"
|
|
"{"
|
|
JUCE_MOD_TEXTURE_COORD
|
|
"gl_FragColor = frontColour.a * " JUCE_GET_IMAGE_PIXEL ";"
|
|
"}"),
|
|
imageParams (program)
|
|
{}
|
|
|
|
ImageParams imageParams;
|
|
};
|
|
|
|
struct TiledImageMaskedProgram : public ShaderBase
|
|
{
|
|
TiledImageMaskedProgram (OpenGLContext& context)
|
|
: ShaderBase (context, JUCE_DECLARE_IMAGE_UNIFORMS JUCE_DECLARE_MASK_UNIFORMS JUCE_DECLARE_SWIZZLE_FUNCTION
|
|
"void main()"
|
|
"{"
|
|
JUCE_MOD_TEXTURE_COORD
|
|
"gl_FragColor = frontColour.a * " JUCE_GET_IMAGE_PIXEL " * " JUCE_GET_MASK_ALPHA ";"
|
|
"}"),
|
|
imageParams (program),
|
|
maskParams (program)
|
|
{}
|
|
|
|
ImageParams imageParams;
|
|
MaskedShaderParams maskParams;
|
|
};
|
|
|
|
struct CopyTextureProgram : public ShaderBase
|
|
{
|
|
CopyTextureProgram (OpenGLContext& context)
|
|
: ShaderBase (context, JUCE_DECLARE_IMAGE_UNIFORMS JUCE_DECLARE_SWIZZLE_FUNCTION
|
|
"void main()"
|
|
"{"
|
|
JUCE_MOD_TEXTURE_COORD
|
|
"gl_FragColor = frontColour.a * " JUCE_GET_IMAGE_PIXEL ";"
|
|
"}"),
|
|
imageParams (program)
|
|
{}
|
|
|
|
ImageParams imageParams;
|
|
};
|
|
|
|
struct MaskTextureProgram : public ShaderBase
|
|
{
|
|
MaskTextureProgram (OpenGLContext& context)
|
|
: ShaderBase (context, JUCE_DECLARE_IMAGE_UNIFORMS JUCE_DECLARE_SWIZZLE_FUNCTION
|
|
"void main()"
|
|
"{"
|
|
JUCE_HIGHP " vec2 texturePos = " JUCE_MATRIX_TIMES_FRAGCOORD ";"
|
|
JUCE_HIGHP " float roundingError = 0.00001;"
|
|
"if (texturePos.x >= imageLimits.x - roundingError"
|
|
"&& texturePos.y >= imageLimits.y - roundingError"
|
|
"&& texturePos.x <= imageLimits.z + roundingError"
|
|
"&& texturePos.y <= imageLimits.w + roundingError)"
|
|
"gl_FragColor = frontColour * " JUCE_GET_IMAGE_PIXEL ".a;"
|
|
"else "
|
|
"gl_FragColor = vec4 (0, 0, 0, 0);"
|
|
"}"),
|
|
imageParams (program)
|
|
{}
|
|
|
|
ImageParams imageParams;
|
|
};
|
|
|
|
SolidColourProgram solidColourProgram;
|
|
SolidColourMaskedProgram solidColourMasked;
|
|
RadialGradientProgram radialGradient;
|
|
RadialGradientMaskedProgram radialGradientMasked;
|
|
LinearGradient1Program linearGradient1;
|
|
LinearGradient1MaskedProgram linearGradient1Masked;
|
|
LinearGradient2Program linearGradient2;
|
|
LinearGradient2MaskedProgram linearGradient2Masked;
|
|
ImageProgram image;
|
|
ImageMaskedProgram imageMasked;
|
|
TiledImageProgram tiledImage;
|
|
TiledImageMaskedProgram tiledImageMasked;
|
|
CopyTextureProgram copyTexture;
|
|
MaskTextureProgram maskTexture;
|
|
};
|
|
|
|
//==============================================================================
|
|
struct StateHelpers
|
|
{
|
|
struct BlendingMode
|
|
{
|
|
BlendingMode() noexcept
|
|
: blendingEnabled (false), srcFunction (0), dstFunction (0)
|
|
{}
|
|
|
|
void resync() noexcept
|
|
{
|
|
glDisable (GL_BLEND);
|
|
srcFunction = dstFunction = 0;
|
|
}
|
|
|
|
template <class QuadQueueType>
|
|
void setPremultipliedBlendingMode (QuadQueueType& quadQueue) noexcept
|
|
{
|
|
setBlendFunc (quadQueue, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
|
|
}
|
|
|
|
template <class QuadQueueType>
|
|
void setBlendFunc (QuadQueueType& quadQueue, GLenum src, GLenum dst)
|
|
{
|
|
if (! blendingEnabled)
|
|
{
|
|
quadQueue.flush();
|
|
blendingEnabled = true;
|
|
glEnable (GL_BLEND);
|
|
}
|
|
|
|
if (srcFunction != src || dstFunction != dst)
|
|
{
|
|
quadQueue.flush();
|
|
srcFunction = src;
|
|
dstFunction = dst;
|
|
glBlendFunc (src, dst);
|
|
}
|
|
}
|
|
|
|
template <class QuadQueueType>
|
|
void disableBlend (QuadQueueType& quadQueue) noexcept
|
|
{
|
|
if (blendingEnabled)
|
|
{
|
|
quadQueue.flush();
|
|
blendingEnabled = false;
|
|
glDisable (GL_BLEND);
|
|
}
|
|
}
|
|
|
|
template <class QuadQueueType>
|
|
void setBlendMode (QuadQueueType& quadQueue, const bool replaceExistingContents) noexcept
|
|
{
|
|
if (replaceExistingContents)
|
|
disableBlend (quadQueue);
|
|
else
|
|
setPremultipliedBlendingMode (quadQueue);
|
|
}
|
|
|
|
private:
|
|
bool blendingEnabled;
|
|
GLenum srcFunction, dstFunction;
|
|
};
|
|
|
|
//==============================================================================
|
|
template <class QuadQueueType>
|
|
struct EdgeTableRenderer
|
|
{
|
|
EdgeTableRenderer (QuadQueueType& quadQueue_, const PixelARGB& colour_) noexcept
|
|
: quadQueue (quadQueue_), colour (colour_)
|
|
{}
|
|
|
|
void setEdgeTableYPos (const int y) noexcept
|
|
{
|
|
currentY = y;
|
|
}
|
|
|
|
void handleEdgeTablePixel (const int x, const int alphaLevel) noexcept
|
|
{
|
|
PixelARGB c (colour);
|
|
c.multiplyAlpha (alphaLevel);
|
|
quadQueue.add (x, currentY, 1, 1, c);
|
|
}
|
|
|
|
void handleEdgeTablePixelFull (const int x) noexcept
|
|
{
|
|
quadQueue.add (x, currentY, 1, 1, colour);
|
|
}
|
|
|
|
void handleEdgeTableLine (const int x, const int width, const int alphaLevel) noexcept
|
|
{
|
|
PixelARGB c (colour);
|
|
c.multiplyAlpha (alphaLevel);
|
|
quadQueue.add (x, currentY, width, 1, c);
|
|
}
|
|
|
|
void handleEdgeTableLineFull (const int x, const int width) noexcept
|
|
{
|
|
quadQueue.add (x, currentY, width, 1, colour);
|
|
}
|
|
|
|
private:
|
|
QuadQueueType& quadQueue;
|
|
const PixelARGB colour;
|
|
int currentY;
|
|
|
|
JUCE_DECLARE_NON_COPYABLE (EdgeTableRenderer)
|
|
};
|
|
|
|
template <class QuadQueueType>
|
|
struct FloatRectangleRenderer
|
|
{
|
|
FloatRectangleRenderer (QuadQueueType& quadQueue_, const PixelARGB& colour_) noexcept
|
|
: quadQueue (quadQueue_), colour (colour_)
|
|
{}
|
|
|
|
void operator() (const int x, const int y, const int w, const int h, const int alpha) noexcept
|
|
{
|
|
if (w > 0 && h > 0)
|
|
{
|
|
PixelARGB c (colour);
|
|
c.multiplyAlpha (alpha);
|
|
quadQueue.add (x, y, w, h, c);
|
|
}
|
|
}
|
|
|
|
private:
|
|
QuadQueueType& quadQueue;
|
|
const PixelARGB colour;
|
|
|
|
JUCE_DECLARE_NON_COPYABLE (FloatRectangleRenderer)
|
|
};
|
|
|
|
//==============================================================================
|
|
struct ActiveTextures
|
|
{
|
|
ActiveTextures (const OpenGLContext& c) noexcept
|
|
: texturesEnabled (0), currentActiveTexture (0), context (c)
|
|
{}
|
|
|
|
void clear() noexcept
|
|
{
|
|
zeromem (currentTextureID, sizeof (currentTextureID));
|
|
}
|
|
|
|
void clearCurrent() noexcept
|
|
{
|
|
currentTextureID [currentActiveTexture] = 0;
|
|
}
|
|
|
|
template <class QuadQueueType>
|
|
void setTexturesEnabled (QuadQueueType& quadQueue, const int textureIndexMask) noexcept
|
|
{
|
|
if (texturesEnabled != textureIndexMask)
|
|
{
|
|
quadQueue.flush();
|
|
|
|
for (int i = 3; --i >= 0;)
|
|
{
|
|
if ((texturesEnabled & (1 << i)) != (textureIndexMask & (1 << i)))
|
|
{
|
|
setActiveTexture (i);
|
|
JUCE_CHECK_OPENGL_ERROR
|
|
|
|
#if ! JUCE_ANDROID
|
|
if ((textureIndexMask & (1 << i)) != 0)
|
|
glEnable (GL_TEXTURE_2D);
|
|
else
|
|
{
|
|
glDisable (GL_TEXTURE_2D);
|
|
currentTextureID[i] = 0;
|
|
}
|
|
|
|
clearGLError();
|
|
#endif
|
|
}
|
|
}
|
|
|
|
texturesEnabled = textureIndexMask;
|
|
}
|
|
}
|
|
|
|
template <class QuadQueueType>
|
|
void disableTextures (QuadQueueType& quadQueue) noexcept
|
|
{
|
|
setTexturesEnabled (quadQueue, 0);
|
|
}
|
|
|
|
template <class QuadQueueType>
|
|
void setSingleTextureMode (QuadQueueType& quadQueue) noexcept
|
|
{
|
|
setTexturesEnabled (quadQueue, 1);
|
|
setActiveTexture (0);
|
|
}
|
|
|
|
template <class QuadQueueType>
|
|
void setTwoTextureMode (QuadQueueType& quadQueue, GLuint texture1, GLuint texture2)
|
|
{
|
|
JUCE_CHECK_OPENGL_ERROR
|
|
setTexturesEnabled (quadQueue, 3);
|
|
|
|
if (currentActiveTexture == 0)
|
|
{
|
|
bindTexture (texture1);
|
|
setActiveTexture (1);
|
|
bindTexture (texture2);
|
|
}
|
|
else
|
|
{
|
|
setActiveTexture (1);
|
|
bindTexture (texture2);
|
|
setActiveTexture (0);
|
|
bindTexture (texture1);
|
|
}
|
|
JUCE_CHECK_OPENGL_ERROR
|
|
}
|
|
|
|
void setActiveTexture (const int index) noexcept
|
|
{
|
|
if (currentActiveTexture != index)
|
|
{
|
|
currentActiveTexture = index;
|
|
context.extensions.glActiveTexture (GL_TEXTURE0 + index);
|
|
JUCE_CHECK_OPENGL_ERROR
|
|
}
|
|
}
|
|
|
|
void bindTexture (const GLuint textureID) noexcept
|
|
{
|
|
if (currentTextureID [currentActiveTexture] != textureID)
|
|
{
|
|
currentTextureID [currentActiveTexture] = textureID;
|
|
glBindTexture (GL_TEXTURE_2D, textureID);
|
|
JUCE_CHECK_OPENGL_ERROR
|
|
}
|
|
else
|
|
{
|
|
#if JUCE_DEBUG
|
|
GLint t = 0;
|
|
glGetIntegerv (GL_TEXTURE_BINDING_2D, &t);
|
|
jassert (t == (GLint) textureID);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
private:
|
|
GLuint currentTextureID [3];
|
|
int texturesEnabled, currentActiveTexture;
|
|
const OpenGLContext& context;
|
|
|
|
ActiveTextures& operator= (const ActiveTextures&);
|
|
};
|
|
|
|
//==============================================================================
|
|
struct TextureCache
|
|
{
|
|
TextureCache() noexcept
|
|
: activeGradientIndex (0), gradientNeedsRefresh (true)
|
|
{}
|
|
|
|
OpenGLTexture* getTexture (ActiveTextures& activeTextures, int w, int h)
|
|
{
|
|
if (textures.size() < numTexturesToCache)
|
|
{
|
|
activeTextures.clear();
|
|
return new OpenGLTexture();
|
|
}
|
|
|
|
for (int i = 0; i < numTexturesToCache - 2; ++i)
|
|
{
|
|
const OpenGLTexture* const t = textures.getUnchecked(i);
|
|
if (t->getWidth() == w && t->getHeight() == h)
|
|
return textures.removeAndReturn (i);
|
|
}
|
|
|
|
return textures.removeAndReturn (0);
|
|
}
|
|
|
|
void releaseTexture (ActiveTextures& activeTextures, OpenGLTexture* texture)
|
|
{
|
|
activeTextures.clearCurrent();
|
|
textures.add (texture);
|
|
}
|
|
|
|
void resetGradient() noexcept
|
|
{
|
|
gradientNeedsRefresh = true;
|
|
}
|
|
|
|
void bindTextureForGradient (ActiveTextures& activeTextures, const ColourGradient& gradient)
|
|
{
|
|
if (gradientNeedsRefresh)
|
|
{
|
|
gradientNeedsRefresh = false;
|
|
|
|
if (gradientTextures.size() < numGradientTexturesToCache)
|
|
{
|
|
activeGradientIndex = gradientTextures.size();
|
|
activeTextures.clear();
|
|
gradientTextures.add (new OpenGLTexture());
|
|
}
|
|
else
|
|
{
|
|
activeGradientIndex = (activeGradientIndex + 1) % numGradientTexturesToCache;
|
|
}
|
|
|
|
JUCE_CHECK_OPENGL_ERROR;
|
|
PixelARGB lookup [gradientTextureSize];
|
|
gradient.createLookupTable (lookup, gradientTextureSize);
|
|
gradientTextures.getUnchecked (activeGradientIndex)->loadARGB (lookup, gradientTextureSize, 1);
|
|
}
|
|
|
|
activeTextures.bindTexture (gradientTextures.getUnchecked (activeGradientIndex)->getTextureID());
|
|
}
|
|
|
|
enum { gradientTextureSize = 256 };
|
|
|
|
private:
|
|
enum { numTexturesToCache = 8, numGradientTexturesToCache = 10 };
|
|
OwnedArray<OpenGLTexture> textures, gradientTextures;
|
|
int activeGradientIndex;
|
|
bool gradientNeedsRefresh;
|
|
};
|
|
|
|
//==============================================================================
|
|
struct ShaderQuadQueue
|
|
{
|
|
ShaderQuadQueue (const OpenGLContext& c) noexcept
|
|
: context (c), numVertices (0)
|
|
{}
|
|
|
|
~ShaderQuadQueue() noexcept
|
|
{
|
|
static_jassert (sizeof (VertexInfo) == 8);
|
|
context.extensions.glDeleteBuffers (2, buffers);
|
|
}
|
|
|
|
void initialise() noexcept
|
|
{
|
|
JUCE_CHECK_OPENGL_ERROR
|
|
for (int i = 0, v = 0; i < numQuads * 6; i += 6, v += 4)
|
|
{
|
|
indexData[i] = (GLushort) v;
|
|
indexData[i + 1] = indexData[i + 3] = (GLushort) (v + 1);
|
|
indexData[i + 2] = indexData[i + 4] = (GLushort) (v + 2);
|
|
indexData[i + 5] = (GLushort) (v + 3);
|
|
}
|
|
|
|
context.extensions.glGenBuffers (2, buffers);
|
|
context.extensions.glBindBuffer (GL_ARRAY_BUFFER, buffers[0]);
|
|
context.extensions.glBindBuffer (GL_ELEMENT_ARRAY_BUFFER, buffers[1]);
|
|
context.extensions.glBufferData (GL_ELEMENT_ARRAY_BUFFER, sizeof (indexData), indexData, GL_STATIC_DRAW);
|
|
JUCE_CHECK_OPENGL_ERROR
|
|
}
|
|
|
|
void add (const int x, const int y, const int w, const int h, const PixelARGB& colour) noexcept
|
|
{
|
|
jassert (w > 0 && h > 0);
|
|
|
|
VertexInfo* const v = vertexData + numVertices;
|
|
v[0].x = v[2].x = (GLshort) x;
|
|
v[0].y = v[1].y = (GLshort) y;
|
|
v[1].x = v[3].x = (GLshort) (x + w);
|
|
v[2].y = v[3].y = (GLshort) (y + h);
|
|
|
|
const GLuint rgba = colour.getInRGBAMemoryOrder();
|
|
v[0].colour = rgba;
|
|
v[1].colour = rgba;
|
|
v[2].colour = rgba;
|
|
v[3].colour = rgba;
|
|
|
|
numVertices += 4;
|
|
|
|
if (numVertices > numQuads * 4 - 4)
|
|
draw();
|
|
}
|
|
|
|
void add (const Rectangle<int>& r, const PixelARGB& colour) noexcept
|
|
{
|
|
add (r.getX(), r.getY(), r.getWidth(), r.getHeight(), colour);
|
|
}
|
|
|
|
void add (const Rectangle<float>& r, const PixelARGB& colour) noexcept
|
|
{
|
|
FloatRectangleRenderer<ShaderQuadQueue> frr (*this, colour);
|
|
RenderingHelpers::FloatRectangleRasterisingInfo (r).iterate (frr);
|
|
}
|
|
|
|
void add (const RectangleList& list, const PixelARGB& colour) noexcept
|
|
{
|
|
for (const Rectangle<int>* i = list.begin(), * const e = list.end(); i != e; ++i)
|
|
add (*i, colour);
|
|
}
|
|
|
|
void add (const RectangleList& list, const Rectangle<int>& clip, const PixelARGB& colour) noexcept
|
|
{
|
|
for (const Rectangle<int>* i = list.begin(), * const e = list.end(); i != e; ++i)
|
|
{
|
|
const Rectangle<int> r (i->getIntersection (clip));
|
|
|
|
if (! r.isEmpty())
|
|
add (r, colour);
|
|
}
|
|
}
|
|
|
|
void add (const EdgeTable& et, const PixelARGB& colour)
|
|
{
|
|
EdgeTableRenderer<ShaderQuadQueue> etr (*this, colour);
|
|
et.iterate (etr);
|
|
}
|
|
|
|
void flush() noexcept
|
|
{
|
|
if (numVertices > 0)
|
|
draw();
|
|
}
|
|
|
|
private:
|
|
struct VertexInfo
|
|
{
|
|
GLshort x, y;
|
|
GLuint colour;
|
|
};
|
|
|
|
#if ! (JUCE_MAC || JUCE_ANDROID || JUCE_IOS)
|
|
enum { numQuads = 64 }; // (had problems with my drivers segfaulting when these buffers are any larger)
|
|
#else
|
|
enum { numQuads = 8192 };
|
|
#endif
|
|
|
|
GLuint buffers[2];
|
|
VertexInfo vertexData [numQuads * 4];
|
|
GLushort indexData [numQuads * 6];
|
|
const OpenGLContext& context;
|
|
int numVertices;
|
|
|
|
void draw() noexcept
|
|
{
|
|
context.extensions.glBufferData (GL_ARRAY_BUFFER, numVertices * sizeof (VertexInfo), vertexData, GL_DYNAMIC_DRAW);
|
|
glDrawElements (GL_TRIANGLES, (numVertices * 3) / 2, GL_UNSIGNED_SHORT, 0);
|
|
JUCE_CHECK_OPENGL_ERROR
|
|
numVertices = 0;
|
|
}
|
|
|
|
JUCE_DECLARE_NON_COPYABLE (ShaderQuadQueue)
|
|
};
|
|
|
|
//==============================================================================
|
|
struct CurrentShader
|
|
{
|
|
CurrentShader (OpenGLContext& c) noexcept
|
|
: context (c),
|
|
activeShader (nullptr)
|
|
{
|
|
const char programValueID[] = "GraphicsContextPrograms";
|
|
programs = static_cast <ShaderPrograms*> (context.getAssociatedObject (programValueID));
|
|
|
|
if (programs == nullptr)
|
|
{
|
|
programs = new ShaderPrograms (context);
|
|
context.setAssociatedObject (programValueID, programs);
|
|
}
|
|
}
|
|
|
|
void setShader (const Rectangle<int>& bounds, ShaderQuadQueue& quadQueue, ShaderPrograms::ShaderBase& shader)
|
|
{
|
|
if (activeShader != &shader)
|
|
{
|
|
quadQueue.flush();
|
|
activeShader = &shader;
|
|
shader.program.use();
|
|
shader.bindAttributes (context);
|
|
|
|
currentBounds = bounds;
|
|
shader.set2DBounds (bounds.toFloat());
|
|
|
|
JUCE_CHECK_OPENGL_ERROR
|
|
}
|
|
else if (bounds != currentBounds)
|
|
{
|
|
currentBounds = bounds;
|
|
shader.set2DBounds (bounds.toFloat());
|
|
}
|
|
}
|
|
|
|
void setShader (Target& target, ShaderQuadQueue& quadQueue, ShaderPrograms::ShaderBase& shader)
|
|
{
|
|
setShader (target.bounds, quadQueue, shader);
|
|
}
|
|
|
|
void clearShader (ShaderQuadQueue& quadQueue)
|
|
{
|
|
if (activeShader != nullptr)
|
|
{
|
|
quadQueue.flush();
|
|
activeShader->unbindAttributes (context);
|
|
activeShader = nullptr;
|
|
context.extensions.glUseProgram (0);
|
|
}
|
|
}
|
|
|
|
OpenGLContext& context;
|
|
ShaderPrograms::Ptr programs;
|
|
|
|
private:
|
|
ShaderPrograms::ShaderBase* activeShader;
|
|
Rectangle<int> currentBounds;
|
|
|
|
CurrentShader& operator= (const CurrentShader&);
|
|
};
|
|
};
|
|
|
|
//==============================================================================
|
|
class GLState
|
|
{
|
|
public:
|
|
GLState (const Target& target_) noexcept
|
|
: target (target_),
|
|
activeTextures (target_.context),
|
|
currentShader (target_.context),
|
|
shaderQuadQueue (target_.context),
|
|
previousFrameBufferTarget (OpenGLFrameBuffer::getCurrentFrameBufferTarget())
|
|
{
|
|
// This object can only be created and used when the current thread has an active OpenGL context.
|
|
jassert (OpenGLHelpers::isContextActive());
|
|
|
|
JUCE_CHECK_OPENGL_ERROR
|
|
target.makeActive();
|
|
blendMode.resync();
|
|
JUCE_CHECK_OPENGL_ERROR
|
|
|
|
#ifdef GL_COLOR_ARRAY
|
|
glDisableClientState (GL_COLOR_ARRAY);
|
|
glDisableClientState (GL_NORMAL_ARRAY);
|
|
glDisableClientState (GL_VERTEX_ARRAY);
|
|
glDisableClientState (GL_INDEX_ARRAY);
|
|
|
|
for (int i = 3; --i >= 0;)
|
|
{
|
|
activeTextures.setActiveTexture (i);
|
|
glDisableClientState (GL_TEXTURE_COORD_ARRAY);
|
|
}
|
|
#endif
|
|
|
|
JUCE_CHECK_OPENGL_ERROR
|
|
activeTextures.clear();
|
|
shaderQuadQueue.initialise();
|
|
JUCE_CHECK_OPENGL_ERROR
|
|
}
|
|
|
|
~GLState()
|
|
{
|
|
flush();
|
|
target.context.extensions.glBindFramebuffer (GL_FRAMEBUFFER, previousFrameBufferTarget);
|
|
|
|
#if defined (GL_INDEX_ARRAY)
|
|
glDisableClientState (GL_INDEX_ARRAY);
|
|
#endif
|
|
|
|
target.context.extensions.glBindBuffer (GL_ARRAY_BUFFER, 0);
|
|
target.context.extensions.glBindBuffer (GL_ELEMENT_ARRAY_BUFFER, 0);
|
|
}
|
|
|
|
void flush()
|
|
{
|
|
currentShader.clearShader (shaderQuadQueue);
|
|
shaderQuadQueue.flush();
|
|
JUCE_CHECK_OPENGL_ERROR
|
|
}
|
|
|
|
void setShader (ShaderPrograms::ShaderBase& shader)
|
|
{
|
|
currentShader.setShader (target, shaderQuadQueue, shader);
|
|
JUCE_CHECK_OPENGL_ERROR
|
|
}
|
|
|
|
void setShaderForGradientFill (const ColourGradient& g, const AffineTransform& transform,
|
|
const int maskTextureID, const Rectangle<int>* const maskArea)
|
|
{
|
|
JUCE_CHECK_OPENGL_ERROR
|
|
activeTextures.disableTextures (shaderQuadQueue);
|
|
blendMode.setPremultipliedBlendingMode (shaderQuadQueue);
|
|
JUCE_CHECK_OPENGL_ERROR
|
|
|
|
if (maskArea != nullptr)
|
|
{
|
|
activeTextures.setTexturesEnabled (shaderQuadQueue, 3);
|
|
activeTextures.setActiveTexture (1);
|
|
activeTextures.bindTexture (maskTextureID);
|
|
activeTextures.setActiveTexture (0);
|
|
textureCache.bindTextureForGradient (activeTextures, g);
|
|
}
|
|
else
|
|
{
|
|
activeTextures.setSingleTextureMode (shaderQuadQueue);
|
|
textureCache.bindTextureForGradient (activeTextures, g);
|
|
}
|
|
|
|
const AffineTransform t (transform.translated ((float) -target.bounds.getX(), (float) -target.bounds.getY()));
|
|
Point<float> p1 (g.point1.transformedBy (t));
|
|
const Point<float> p2 (g.point2.transformedBy (t));
|
|
const Point<float> p3 (Point<float> (g.point1.x + (g.point2.y - g.point1.y),
|
|
g.point1.y - (g.point2.x - g.point1.x)).transformedBy (t));
|
|
|
|
ShaderPrograms* const programs = currentShader.programs;
|
|
const ShaderPrograms::MaskedShaderParams* maskParams = nullptr;
|
|
|
|
if (g.isRadial)
|
|
{
|
|
ShaderPrograms::RadialGradientParams* gradientParams;
|
|
|
|
if (maskArea == nullptr)
|
|
{
|
|
setShader (programs->radialGradient);
|
|
gradientParams = &programs->radialGradient.gradientParams;
|
|
}
|
|
else
|
|
{
|
|
setShader (programs->radialGradientMasked);
|
|
gradientParams = &programs->radialGradientMasked.gradientParams;
|
|
maskParams = &programs->radialGradientMasked.maskParams;
|
|
}
|
|
|
|
gradientParams->setMatrix (p1, p2, p3);
|
|
}
|
|
else
|
|
{
|
|
p1 = Line<float> (p1, p3).findNearestPointTo (p2);
|
|
const Point<float> delta (p2.x - p1.x, p1.y - p2.y);
|
|
const ShaderPrograms::LinearGradientParams* gradientParams;
|
|
float grad, length;
|
|
|
|
if (std::abs (delta.x) < std::abs (delta.y))
|
|
{
|
|
if (maskArea == nullptr)
|
|
{
|
|
setShader (programs->linearGradient1);
|
|
gradientParams = &(programs->linearGradient1.gradientParams);
|
|
}
|
|
else
|
|
{
|
|
setShader (programs->linearGradient1Masked);
|
|
gradientParams = &(programs->linearGradient1Masked.gradientParams);
|
|
maskParams = &programs->linearGradient1Masked.maskParams;
|
|
}
|
|
|
|
grad = delta.x / delta.y;
|
|
length = (p2.y - grad * p2.x) - (p1.y - grad * p1.x);
|
|
}
|
|
else
|
|
{
|
|
if (maskArea == nullptr)
|
|
{
|
|
setShader (programs->linearGradient2);
|
|
gradientParams = &(programs->linearGradient2.gradientParams);
|
|
}
|
|
else
|
|
{
|
|
setShader (programs->linearGradient2Masked);
|
|
gradientParams = &(programs->linearGradient2Masked.gradientParams);
|
|
maskParams = &programs->linearGradient2Masked.maskParams;
|
|
}
|
|
|
|
grad = delta.y / delta.x;
|
|
length = (p2.x - grad * p2.y) - (p1.x - grad * p1.y);
|
|
}
|
|
|
|
gradientParams->gradientInfo.set (p1.x, p1.y, grad, length);
|
|
}
|
|
|
|
if (maskParams != nullptr)
|
|
maskParams->setBounds (*maskArea, target, 1);
|
|
|
|
JUCE_CHECK_OPENGL_ERROR
|
|
}
|
|
|
|
void setShaderForTiledImageFill (const OpenGLTextureFromImage& image, const AffineTransform& transform,
|
|
const int maskTextureID, const Rectangle<int>* const maskArea, const bool clampTiledImages)
|
|
{
|
|
blendMode.setPremultipliedBlendingMode (shaderQuadQueue);
|
|
|
|
ShaderPrograms* const programs = currentShader.programs;
|
|
|
|
const ShaderPrograms::MaskedShaderParams* maskParams = nullptr;
|
|
const ShaderPrograms::ImageParams* imageParams;
|
|
|
|
if (maskArea != nullptr)
|
|
{
|
|
activeTextures.setTwoTextureMode (shaderQuadQueue, image.textureID, maskTextureID);
|
|
|
|
if (clampTiledImages)
|
|
{
|
|
setShader (programs->imageMasked);
|
|
imageParams = &programs->imageMasked.imageParams;
|
|
maskParams = &programs->imageMasked.maskParams;
|
|
}
|
|
else
|
|
{
|
|
setShader (programs->tiledImageMasked);
|
|
imageParams = &programs->tiledImageMasked.imageParams;
|
|
maskParams = &programs->tiledImageMasked.maskParams;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
activeTextures.setSingleTextureMode (shaderQuadQueue);
|
|
activeTextures.bindTexture (image.textureID);
|
|
|
|
if (clampTiledImages)
|
|
{
|
|
setShader (programs->image);
|
|
imageParams = &programs->image.imageParams;
|
|
}
|
|
else
|
|
{
|
|
setShader (programs->tiledImage);
|
|
imageParams = &programs->tiledImage.imageParams;
|
|
}
|
|
}
|
|
|
|
imageParams->setMatrix (transform, image, (float) target.bounds.getX(), (float) target.bounds.getY());
|
|
|
|
if (maskParams != nullptr)
|
|
maskParams->setBounds (*maskArea, target, 1);
|
|
}
|
|
|
|
Target target;
|
|
|
|
StateHelpers::BlendingMode blendMode;
|
|
StateHelpers::ActiveTextures activeTextures;
|
|
StateHelpers::TextureCache textureCache;
|
|
StateHelpers::CurrentShader currentShader;
|
|
StateHelpers::ShaderQuadQueue shaderQuadQueue;
|
|
|
|
private:
|
|
GLuint previousFrameBufferTarget;
|
|
};
|
|
|
|
//==============================================================================
|
|
class ClipRegionBase : public SingleThreadedReferenceCountedObject
|
|
{
|
|
public:
|
|
ClipRegionBase (GLState& state_) noexcept : state (state_) {}
|
|
virtual ~ClipRegionBase() {}
|
|
|
|
typedef ReferenceCountedObjectPtr<ClipRegionBase> Ptr;
|
|
|
|
virtual Ptr clone() const = 0;
|
|
virtual Ptr clipToRectangle (const Rectangle<int>&) = 0;
|
|
virtual Ptr clipToRectangleList (const RectangleList&) = 0;
|
|
virtual Ptr excludeClipRectangle (const Rectangle<int>&) = 0;
|
|
virtual Ptr clipToPath (const Path& p, const AffineTransform&) = 0;
|
|
virtual Ptr clipToImageAlpha (const OpenGLTextureFromImage&, const AffineTransform&) = 0;
|
|
virtual Ptr clipToTexture (const PositionedTexture&) = 0;
|
|
virtual Rectangle<int> getClipBounds() const = 0;
|
|
virtual void fillRect (const Rectangle<int>& area, const FillType&, bool replaceContents) = 0;
|
|
virtual void fillRect (const Rectangle<float>& area, const FillType&) = 0;
|
|
virtual void fillEdgeTable (EdgeTable& et, const FillType& fill) = 0;
|
|
virtual void drawImage (const Image&, const AffineTransform&, float alpha,
|
|
const Rectangle<int>& clip, EdgeTable* mask) = 0;
|
|
|
|
GLState& state;
|
|
|
|
JUCE_DECLARE_NON_COPYABLE (ClipRegionBase)
|
|
};
|
|
|
|
|
|
//==============================================================================
|
|
class ClipRegion_Mask : public ClipRegionBase
|
|
{
|
|
public:
|
|
ClipRegion_Mask (const ClipRegion_Mask& other)
|
|
: ClipRegionBase (other.state),
|
|
clip (other.clip),
|
|
maskArea (other.clip)
|
|
{
|
|
TargetSaver ts (state.target.context);
|
|
state.currentShader.clearShader (state.shaderQuadQueue);
|
|
state.shaderQuadQueue.flush();
|
|
state.activeTextures.setSingleTextureMode (state.shaderQuadQueue);
|
|
state.activeTextures.clear();
|
|
mask.initialise (state.target.context, maskArea.getWidth(), maskArea.getHeight());
|
|
maskArea.setSize (mask.getWidth(), mask.getHeight());
|
|
makeActive();
|
|
|
|
state.blendMode.disableBlend (state.shaderQuadQueue);
|
|
state.activeTextures.setSingleTextureMode (state.shaderQuadQueue);
|
|
state.activeTextures.bindTexture (other.mask.getTextureID());
|
|
|
|
state.currentShader.setShader (maskArea, state.shaderQuadQueue, state.currentShader.programs->copyTexture);
|
|
state.currentShader.programs->copyTexture.imageParams.imageTexture.set (0);
|
|
state.currentShader.programs->copyTexture.imageParams
|
|
.setMatrix (AffineTransform::translation ((float) other.maskArea.getX(), (float) other.maskArea.getY()),
|
|
other.maskArea.getWidth(), other.maskArea.getHeight(), 1.0f, 1.0f,
|
|
(float) maskArea.getX(), (float) maskArea.getY());
|
|
|
|
state.shaderQuadQueue.add (clip, PixelARGB (0xffffffff));
|
|
state.shaderQuadQueue.flush();
|
|
}
|
|
|
|
ClipRegion_Mask (GLState& state_, const RectangleList& r)
|
|
: ClipRegionBase (state_),
|
|
clip (r.getBounds()),
|
|
maskArea (clip)
|
|
{
|
|
TargetSaver ts (state.target.context);
|
|
state.currentShader.clearShader (state.shaderQuadQueue);
|
|
state.shaderQuadQueue.flush();
|
|
state.activeTextures.clear();
|
|
mask.initialise (state.target.context, maskArea.getWidth(), maskArea.getHeight());
|
|
maskArea.setSize (mask.getWidth(), mask.getHeight());
|
|
mask.makeCurrentAndClear();
|
|
makeActive();
|
|
state.blendMode.setBlendMode (state.shaderQuadQueue, true);
|
|
state.currentShader.setShader (maskArea, state.shaderQuadQueue, state.currentShader.programs->solidColourProgram);
|
|
state.shaderQuadQueue.add (r, PixelARGB (0xffffffff));
|
|
state.shaderQuadQueue.flush();
|
|
}
|
|
|
|
Ptr clone() const { return new ClipRegion_Mask (*this); }
|
|
Rectangle<int> getClipBounds() const { return clip; }
|
|
|
|
Ptr clipToRectangle (const Rectangle<int>& r)
|
|
{
|
|
clip = clip.getIntersection (r);
|
|
return clip.isEmpty() ? nullptr : this;
|
|
}
|
|
|
|
Ptr clipToRectangleList (const RectangleList& r)
|
|
{
|
|
clip = clip.getIntersection (r.getBounds());
|
|
if (clip.isEmpty())
|
|
return Ptr();
|
|
|
|
RectangleList excluded (clip);
|
|
|
|
if (excluded.subtract (r))
|
|
{
|
|
if (excluded.getNumRectangles() == 1)
|
|
return excludeClipRectangle (excluded.getRectangle (0));
|
|
|
|
TargetSaver ts (state.target.context);
|
|
makeActive();
|
|
state.blendMode.setBlendMode (state.shaderQuadQueue, true);
|
|
state.currentShader.setShader (maskArea, state.shaderQuadQueue, state.currentShader.programs->solidColourProgram);
|
|
state.shaderQuadQueue.add (excluded, PixelARGB (0));
|
|
state.shaderQuadQueue.flush();
|
|
}
|
|
|
|
return this;
|
|
}
|
|
|
|
Ptr excludeClipRectangle (const Rectangle<int>& r)
|
|
{
|
|
if (r.contains (clip))
|
|
return Ptr();
|
|
|
|
TargetSaver ts (state.target.context);
|
|
makeActive();
|
|
state.blendMode.setBlendMode (state.shaderQuadQueue, true);
|
|
state.currentShader.setShader (maskArea, state.shaderQuadQueue, state.currentShader.programs->solidColourProgram);
|
|
state.shaderQuadQueue.add (r, PixelARGB (0));
|
|
state.shaderQuadQueue.flush();
|
|
return this;
|
|
}
|
|
|
|
Ptr clipToPath (const Path& p, const AffineTransform& t)
|
|
{
|
|
EdgeTable et (clip, p, t);
|
|
|
|
if (! et.isEmpty())
|
|
{
|
|
TargetSaver ts (state.target.context);
|
|
state.currentShader.clearShader (state.shaderQuadQueue);
|
|
state.shaderQuadQueue.flush();
|
|
state.activeTextures.clear();
|
|
|
|
OpenGLTexture texture;
|
|
PositionedTexture pt (texture, et, clip);
|
|
return clipToTexture (pt);
|
|
}
|
|
|
|
return Ptr();
|
|
}
|
|
|
|
Ptr clipToTexture (const PositionedTexture& pt)
|
|
{
|
|
clip = clip.getIntersection (pt.clip);
|
|
|
|
if (clip.isEmpty())
|
|
return Ptr();
|
|
|
|
TargetSaver ts (state.target.context);
|
|
makeActive();
|
|
|
|
state.activeTextures.setSingleTextureMode (state.shaderQuadQueue);
|
|
state.activeTextures.bindTexture (pt.textureID);
|
|
|
|
state.currentShader.setShader (maskArea, state.shaderQuadQueue, state.currentShader.programs->maskTexture);
|
|
state.currentShader.programs->maskTexture.imageParams.imageTexture.set (0);
|
|
state.currentShader.programs->maskTexture.imageParams
|
|
.setMatrix (AffineTransform::translation ((float) pt.area.getX(), (float) pt.area.getY()),
|
|
pt.area.getWidth(), pt.area.getHeight(), 1.0f, 1.0f,
|
|
(float) maskArea.getX(), (float) maskArea.getY());
|
|
|
|
state.blendMode.setBlendFunc (state.shaderQuadQueue, GL_ZERO, GL_SRC_ALPHA);
|
|
state.shaderQuadQueue.add (clip, PixelARGB (0xffffffff));
|
|
state.shaderQuadQueue.flush();
|
|
return this;
|
|
}
|
|
|
|
Ptr clipToImageAlpha (const OpenGLTextureFromImage& image, const AffineTransform& transform)
|
|
{
|
|
TargetSaver ts (state.target.context);
|
|
makeActive();
|
|
state.activeTextures.setSingleTextureMode (state.shaderQuadQueue);
|
|
state.activeTextures.bindTexture (image.textureID);
|
|
|
|
state.currentShader.setShader (maskArea, state.shaderQuadQueue, state.currentShader.programs->maskTexture);
|
|
state.currentShader.programs->maskTexture.imageParams.imageTexture.set (0);
|
|
state.currentShader.programs->maskTexture.imageParams
|
|
.setMatrix (transform, image, (float) maskArea.getX(), (float) maskArea.getY());
|
|
|
|
state.shaderQuadQueue.add (clip, PixelARGB (0xffffffff));
|
|
state.shaderQuadQueue.flush();
|
|
return this;
|
|
}
|
|
|
|
void fillRect (const Rectangle<int>& area, const FillType& fill, bool replaceContents)
|
|
{
|
|
(void) replaceContents; jassert (! replaceContents);
|
|
const Rectangle<int> r (clip.getIntersection (area));
|
|
|
|
if (! r.isEmpty())
|
|
{
|
|
ShaderFillOperation fillOp (*this, fill, false);
|
|
state.shaderQuadQueue.add (r, fill.colour.getPixelARGB());
|
|
}
|
|
}
|
|
|
|
void fillRect (const Rectangle<float>& area, const FillType& fill)
|
|
{
|
|
ShaderFillOperation fillOp (*this, fill, false);
|
|
|
|
FloatRectangleRenderer frr (*this, fill);
|
|
RenderingHelpers::FloatRectangleRasterisingInfo (area).iterate (frr);
|
|
}
|
|
|
|
void fillEdgeTable (EdgeTable& et, const FillType& fill)
|
|
{
|
|
if (et.getMaximumBounds().intersects (clip))
|
|
{
|
|
if (! clip.contains (et.getMaximumBounds()))
|
|
et.clipToRectangle (clip);
|
|
|
|
ShaderFillOperation fillOp (*this, fill, false);
|
|
state.shaderQuadQueue.add (et, fill.colour.getPixelARGB());
|
|
}
|
|
}
|
|
|
|
void drawImage (const Image& image, const AffineTransform& transform,
|
|
float alpha, const Rectangle<int>& clipArea, EdgeTable* et)
|
|
{
|
|
const Rectangle<int> r (clip.getIntersection (clipArea));
|
|
|
|
if (! r.isEmpty())
|
|
{
|
|
const PixelARGB colour (Colours::white.withAlpha (alpha).getPixelARGB());
|
|
ShaderFillOperation fillOp (*this, FillType (image, transform), true);
|
|
|
|
if (et != nullptr)
|
|
{
|
|
et->clipToRectangle (r);
|
|
|
|
if (! et->isEmpty())
|
|
state.shaderQuadQueue.add (*et, colour);
|
|
}
|
|
else
|
|
{
|
|
state.shaderQuadQueue.add (r, colour);
|
|
}
|
|
}
|
|
|
|
state.currentShader.clearShader (state.shaderQuadQueue);
|
|
}
|
|
|
|
private:
|
|
OpenGLFrameBuffer mask;
|
|
Rectangle<int> clip, maskArea;
|
|
|
|
struct ShaderFillOperation
|
|
{
|
|
ShaderFillOperation (const ClipRegion_Mask& clipMask, const FillType& fill, const bool clampTiledImages)
|
|
: state (clipMask.state)
|
|
{
|
|
const GLuint maskTextureID = clipMask.mask.getTextureID();
|
|
|
|
if (fill.isColour())
|
|
{
|
|
state.blendMode.setPremultipliedBlendingMode (state.shaderQuadQueue);
|
|
state.activeTextures.setSingleTextureMode (state.shaderQuadQueue);
|
|
state.activeTextures.bindTexture (maskTextureID);
|
|
|
|
state.setShader (state.currentShader.programs->solidColourMasked);
|
|
state.currentShader.programs->solidColourMasked.maskParams.setBounds (clipMask.maskArea, state.target, 0);
|
|
}
|
|
else if (fill.isGradient())
|
|
{
|
|
state.setShaderForGradientFill (*fill.gradient, fill.transform, maskTextureID, &clipMask.maskArea);
|
|
}
|
|
else
|
|
{
|
|
jassert (fill.isTiledImage());
|
|
image = new OpenGLTextureFromImage (fill.image);
|
|
state.setShaderForTiledImageFill (*image, fill.transform, maskTextureID, &clipMask.maskArea, clampTiledImages);
|
|
}
|
|
}
|
|
|
|
~ShaderFillOperation()
|
|
{
|
|
state.shaderQuadQueue.flush();
|
|
}
|
|
|
|
GLState& state;
|
|
ScopedPointer<OpenGLTextureFromImage> image;
|
|
|
|
JUCE_DECLARE_NON_COPYABLE (ShaderFillOperation)
|
|
};
|
|
|
|
struct TargetSaver
|
|
{
|
|
TargetSaver (const OpenGLContext& c)
|
|
: context (c), oldFramebuffer (OpenGLFrameBuffer::getCurrentFrameBufferTarget())
|
|
{
|
|
glGetIntegerv (GL_VIEWPORT, oldViewport);
|
|
}
|
|
|
|
~TargetSaver()
|
|
{
|
|
context.extensions.glBindFramebuffer (GL_FRAMEBUFFER, oldFramebuffer);
|
|
glViewport (oldViewport[0], oldViewport[1], oldViewport[2], oldViewport[3]);
|
|
}
|
|
|
|
private:
|
|
const OpenGLContext& context;
|
|
GLuint oldFramebuffer;
|
|
GLint oldViewport[4];
|
|
|
|
TargetSaver& operator= (const TargetSaver&);
|
|
};
|
|
|
|
void makeActive()
|
|
{
|
|
state.shaderQuadQueue.flush();
|
|
state.activeTextures.clear();
|
|
mask.makeCurrentRenderingTarget();
|
|
glViewport (0, 0, maskArea.getWidth(), maskArea.getHeight());
|
|
}
|
|
|
|
struct FloatRectangleRenderer
|
|
{
|
|
FloatRectangleRenderer (ClipRegion_Mask& owner_, const FillType& fill_) noexcept
|
|
: owner (owner_), originalColour (fill_.colour.getPixelARGB())
|
|
{}
|
|
|
|
void operator() (int x, int y, int w, int h, const int alpha) noexcept
|
|
{
|
|
if (owner.clip.intersectRectangle (x, y, w, h))
|
|
{
|
|
PixelARGB col (originalColour);
|
|
col.multiplyAlpha (alpha);
|
|
owner.state.shaderQuadQueue.add (x, y, w, h, col);
|
|
}
|
|
}
|
|
|
|
private:
|
|
ClipRegion_Mask& owner;
|
|
const PixelARGB originalColour;
|
|
|
|
JUCE_DECLARE_NON_COPYABLE (FloatRectangleRenderer)
|
|
};
|
|
|
|
ClipRegion_Mask& operator= (const ClipRegion_Mask&);
|
|
};
|
|
|
|
//==============================================================================
|
|
class ClipRegion_RectangleList : public ClipRegionBase
|
|
{
|
|
public:
|
|
ClipRegion_RectangleList (GLState& state_, const Rectangle<int>& r) noexcept
|
|
: ClipRegionBase (state_), clip (r)
|
|
{}
|
|
|
|
ClipRegion_RectangleList (GLState& state_, const RectangleList& r) noexcept
|
|
: ClipRegionBase (state_), clip (r)
|
|
{}
|
|
|
|
Ptr clone() const { return new ClipRegion_RectangleList (state, clip); }
|
|
|
|
Ptr clipToTexture (const PositionedTexture& t) { return toMask()->clipToTexture (t); }
|
|
Ptr clipToPath (const Path& p, const AffineTransform& transform) { return toMask()->clipToPath (p, transform); }
|
|
Ptr clipToImageAlpha (const OpenGLTextureFromImage& image, const AffineTransform& transform) { return toMask()->clipToImageAlpha (image, transform); }
|
|
|
|
void fillRect (const Rectangle<int>& area, const FillType& fill, bool replaceContents)
|
|
{
|
|
ShaderFillOperation fillOp (*this, fill, replaceContents || fill.colour.isOpaque(), false);
|
|
state.shaderQuadQueue.add (clip, area, fill.colour.getPixelARGB());
|
|
}
|
|
|
|
void fillRect (const Rectangle<float>& area, const FillType& fill)
|
|
{
|
|
const PixelARGB colour (fill.colour.getPixelARGB());
|
|
ShaderFillOperation fillOp (*this, fill, false, false);
|
|
|
|
for (const Rectangle<int>* i = clip.begin(), * const e = clip.end(); i != e; ++i)
|
|
{
|
|
const Rectangle<float> r (i->toFloat().getIntersection (area));
|
|
if (! r.isEmpty())
|
|
state.shaderQuadQueue.add (r, colour);
|
|
}
|
|
}
|
|
|
|
void drawImage (const Image& image, const AffineTransform& transform,
|
|
float alpha, const Rectangle<int>& clipArea, EdgeTable* et)
|
|
{
|
|
FillType fill (image, transform);
|
|
const PixelARGB colour (Colours::white.withAlpha (alpha).getPixelARGB());
|
|
|
|
ShaderFillOperation fillOp (*this, fill, false, true);
|
|
|
|
if (et != nullptr)
|
|
{
|
|
if (! clip.containsRectangle (et->getMaximumBounds()))
|
|
et->clipToEdgeTable (EdgeTable (clip));
|
|
|
|
state.shaderQuadQueue.add (*et, colour);
|
|
}
|
|
else
|
|
{
|
|
state.shaderQuadQueue.add (clip, clipArea, colour);
|
|
}
|
|
|
|
state.currentShader.clearShader (state.shaderQuadQueue);
|
|
}
|
|
|
|
void fillEdgeTable (EdgeTable& et, const FillType& fill)
|
|
{
|
|
if (clip.intersects (et.getMaximumBounds()))
|
|
{
|
|
if (! clip.containsRectangle (et.getMaximumBounds()))
|
|
et.clipToEdgeTable (EdgeTable (clip));
|
|
|
|
ShaderFillOperation fillOp (*this, fill, false, true);
|
|
state.shaderQuadQueue.add (et, fill.colour.getPixelARGB());
|
|
}
|
|
}
|
|
|
|
Rectangle<int> getClipBounds() const { return clip.getBounds(); }
|
|
Ptr clipToRectangle (const Rectangle<int>& r) { return clip.clipTo (r) ? this : nullptr; }
|
|
Ptr clipToRectangleList (const RectangleList& r) { return clip.clipTo (r) ? this : nullptr; }
|
|
Ptr excludeClipRectangle (const Rectangle<int>& r) { clip.subtract (r); return clip.isEmpty() ? nullptr : this; }
|
|
|
|
private:
|
|
RectangleList clip;
|
|
|
|
Ptr toMask() const { return new ClipRegion_Mask (state, clip); }
|
|
|
|
struct ShaderFillOperation
|
|
{
|
|
ShaderFillOperation (const ClipRegion_RectangleList& clipList, const FillType& fill,
|
|
const bool replaceContents, const bool clampTiledImages)
|
|
: state (clipList.state)
|
|
{
|
|
if (fill.isColour())
|
|
{
|
|
state.activeTextures.disableTextures (state.shaderQuadQueue);
|
|
state.blendMode.setBlendMode (state.shaderQuadQueue, replaceContents);
|
|
state.setShader (state.currentShader.programs->solidColourProgram);
|
|
}
|
|
else if (fill.isGradient())
|
|
{
|
|
state.setShaderForGradientFill (*fill.gradient, fill.transform, 0, nullptr);
|
|
}
|
|
else
|
|
{
|
|
jassert (fill.isTiledImage());
|
|
image = new OpenGLTextureFromImage (fill.image);
|
|
state.setShaderForTiledImageFill (*image, fill.transform, 0, nullptr, clampTiledImages);
|
|
}
|
|
}
|
|
|
|
~ShaderFillOperation()
|
|
{
|
|
if (image != nullptr)
|
|
state.shaderQuadQueue.flush();
|
|
}
|
|
|
|
GLState& state;
|
|
ScopedPointer<OpenGLTextureFromImage> image;
|
|
|
|
JUCE_DECLARE_NON_COPYABLE (ShaderFillOperation)
|
|
};
|
|
|
|
JUCE_DECLARE_NON_COPYABLE (ClipRegion_RectangleList)
|
|
};
|
|
|
|
//==============================================================================
|
|
class SavedState
|
|
{
|
|
public:
|
|
SavedState (GLState* const state_)
|
|
: clip (new ClipRegion_RectangleList (*state_, state_->target.bounds)),
|
|
transform (0, 0), interpolationQuality (Graphics::mediumResamplingQuality),
|
|
state (state_), transparencyLayerAlpha (1.0f)
|
|
{}
|
|
|
|
SavedState (const SavedState& other)
|
|
: clip (other.clip), transform (other.transform), font (other.font),
|
|
fillType (other.fillType), interpolationQuality (other.interpolationQuality),
|
|
state (other.state), transparencyLayerAlpha (other.transparencyLayerAlpha),
|
|
transparencyLayer (other.transparencyLayer), previousTarget (other.previousTarget.createCopy())
|
|
{}
|
|
|
|
bool clipToRectangle (const Rectangle<int>& r)
|
|
{
|
|
if (clip != nullptr)
|
|
{
|
|
if (transform.isOnlyTranslated)
|
|
{
|
|
cloneClipIfMultiplyReferenced();
|
|
clip = clip->clipToRectangle (transform.translated (r));
|
|
}
|
|
else if (transform.isIntegerScaling)
|
|
{
|
|
cloneClipIfMultiplyReferenced();
|
|
clip = clip->clipToRectangle (transform.transformed (r).getSmallestIntegerContainer());
|
|
}
|
|
else
|
|
{
|
|
Path p;
|
|
p.addRectangle (r);
|
|
clipToPath (p, AffineTransform::identity);
|
|
}
|
|
}
|
|
|
|
return clip != nullptr;
|
|
}
|
|
|
|
bool clipToRectangleList (const RectangleList& r)
|
|
{
|
|
if (clip != nullptr)
|
|
{
|
|
if (transform.isOnlyTranslated)
|
|
{
|
|
cloneClipIfMultiplyReferenced();
|
|
RectangleList offsetList (r);
|
|
offsetList.offsetAll (transform.xOffset, transform.yOffset);
|
|
clip = clip->clipToRectangleList (offsetList);
|
|
}
|
|
else if (transform.isIntegerScaling)
|
|
{
|
|
cloneClipIfMultiplyReferenced();
|
|
RectangleList scaledList;
|
|
|
|
for (const Rectangle<int>* i = r.begin(), * const e = r.end(); i != e; ++i)
|
|
scaledList.add (transform.transformed (*i).getSmallestIntegerContainer());
|
|
|
|
clip = clip->clipToRectangleList (scaledList);
|
|
}
|
|
else
|
|
{
|
|
clipToPath (r.toPath(), AffineTransform::identity);
|
|
}
|
|
}
|
|
|
|
return clip != nullptr;
|
|
}
|
|
|
|
bool excludeClipRectangle (const Rectangle<int>& r)
|
|
{
|
|
if (clip != nullptr)
|
|
{
|
|
cloneClipIfMultiplyReferenced();
|
|
|
|
if (transform.isOnlyTranslated)
|
|
{
|
|
clip = clip->excludeClipRectangle (transform.translated (r));
|
|
}
|
|
else if (transform.isIntegerScaling)
|
|
{
|
|
clip = clip->excludeClipRectangle (transform.transformed (r).getSmallestIntegerContainer());
|
|
}
|
|
else
|
|
{
|
|
Path p;
|
|
p.addRectangle (r.toFloat());
|
|
p.applyTransform (transform.complexTransform);
|
|
p.addRectangle (clip->getClipBounds().toFloat());
|
|
p.setUsingNonZeroWinding (false);
|
|
clip = clip->clipToPath (p, AffineTransform::identity);
|
|
}
|
|
}
|
|
|
|
return clip != nullptr;
|
|
}
|
|
|
|
void clipToPath (const Path& p, const AffineTransform& t)
|
|
{
|
|
if (clip != nullptr)
|
|
{
|
|
cloneClipIfMultiplyReferenced();
|
|
clip = clip->clipToPath (p, transform.getTransformWith (t));
|
|
}
|
|
}
|
|
|
|
void clipToImageAlpha (const Image& sourceImage, const AffineTransform& t)
|
|
{
|
|
if (clip != nullptr)
|
|
{
|
|
Path p;
|
|
p.addRectangle (sourceImage.getBounds());
|
|
clipToPath (p, t);
|
|
|
|
if (sourceImage.hasAlphaChannel() && clip != nullptr)
|
|
{
|
|
cloneClipIfMultiplyReferenced();
|
|
clip = clip->clipToImageAlpha (sourceImage, transform.getTransformWith (t));
|
|
}
|
|
}
|
|
}
|
|
|
|
bool clipRegionIntersects (const Rectangle<int>& r) const
|
|
{
|
|
return clip != nullptr
|
|
&& (transform.isOnlyTranslated ? clip->getClipBounds().intersects (transform.translated (r))
|
|
: getClipBounds().intersects (r));
|
|
}
|
|
|
|
Rectangle<int> getClipBounds() const
|
|
{
|
|
return clip != nullptr ? transform.deviceSpaceToUserSpace (clip->getClipBounds())
|
|
: Rectangle<int>();
|
|
}
|
|
|
|
SavedState* beginTransparencyLayer (float opacity)
|
|
{
|
|
SavedState* const s = new SavedState (*this);
|
|
|
|
if (clip != nullptr)
|
|
{
|
|
const Rectangle<int> clipBounds (clip->getClipBounds());
|
|
|
|
state->flush();
|
|
s->transparencyLayer = Image (OpenGLImageType().create (Image::ARGB, clipBounds.getWidth(), clipBounds.getHeight(), true));
|
|
s->previousTarget = new Target (state->target);
|
|
state->target = Target (state->target.context, *OpenGLImageType::getFrameBufferFrom (s->transparencyLayer), clipBounds.getPosition());
|
|
s->transparencyLayerAlpha = opacity;
|
|
s->cloneClipIfMultiplyReferenced();
|
|
|
|
s->state->target.makeActive();
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
void endTransparencyLayer (SavedState& finishedLayerState)
|
|
{
|
|
if (clip != nullptr)
|
|
{
|
|
jassert (finishedLayerState.previousTarget != nullptr);
|
|
|
|
state->flush();
|
|
state->target = *finishedLayerState.previousTarget;
|
|
finishedLayerState.previousTarget = nullptr;
|
|
|
|
state->target.makeActive();
|
|
const Rectangle<int> clipBounds (clip->getClipBounds());
|
|
|
|
clip->drawImage (finishedLayerState.transparencyLayer,
|
|
AffineTransform::translation ((float) clipBounds.getX(), (float) clipBounds.getY()),
|
|
finishedLayerState.transparencyLayerAlpha, clipBounds, nullptr);
|
|
}
|
|
}
|
|
|
|
//==============================================================================
|
|
void fillRect (const Rectangle<int>& r, const bool replaceContents)
|
|
{
|
|
if (clip != nullptr)
|
|
{
|
|
if (transform.isOnlyTranslated)
|
|
{
|
|
clip->fillRect (r.translated (transform.xOffset, transform.yOffset),
|
|
getFillType(), replaceContents);
|
|
}
|
|
else
|
|
{
|
|
Path p;
|
|
p.addRectangle (r);
|
|
fillPath (p, AffineTransform::identity);
|
|
}
|
|
}
|
|
}
|
|
|
|
void fillRect (const Rectangle<float>& r)
|
|
{
|
|
if (clip != nullptr)
|
|
{
|
|
if (transform.isOnlyTranslated)
|
|
{
|
|
const Rectangle<float> c (r.translated ((float) transform.xOffset, (float) transform.yOffset)
|
|
.getIntersection (clip->getClipBounds().toFloat()));
|
|
|
|
if (! c.isEmpty())
|
|
clip->fillRect (c, getFillType());
|
|
}
|
|
else
|
|
{
|
|
Path p;
|
|
p.addRectangle (r);
|
|
fillPath (p, AffineTransform::identity);
|
|
}
|
|
}
|
|
}
|
|
|
|
void fillPath (const Path& path, const AffineTransform& t)
|
|
{
|
|
if (clip != nullptr)
|
|
{
|
|
EdgeTable et (clip->getClipBounds(), path, transform.getTransformWith (t));
|
|
fillEdgeTable (et);
|
|
}
|
|
}
|
|
|
|
void drawGlyph (int glyphNumber, const AffineTransform& t)
|
|
{
|
|
if (clip != nullptr)
|
|
{
|
|
if (transform.isOnlyTranslated && t.isOnlyTranslation())
|
|
{
|
|
RenderingHelpers::GlyphCache <RenderingHelpers::CachedGlyphEdgeTable <SavedState>, SavedState>::getInstance()
|
|
.drawGlyph (*this, font, glyphNumber,
|
|
transform.xOffset + t.getTranslationX(),
|
|
transform.yOffset + t.getTranslationY());
|
|
}
|
|
else
|
|
{
|
|
const float fontHeight = font.getHeight();
|
|
|
|
const ScopedPointer<EdgeTable> et (font.getTypeface()->getEdgeTableForGlyph
|
|
(glyphNumber, transform.getTransformWith (AffineTransform::scale (fontHeight * font.getHorizontalScale(), fontHeight)
|
|
.followedBy (t))));
|
|
|
|
if (et != nullptr)
|
|
fillEdgeTable (*et);
|
|
}
|
|
}
|
|
}
|
|
|
|
void fillEdgeTable (const EdgeTable& et, const float x, const int y)
|
|
{
|
|
if (clip != nullptr)
|
|
{
|
|
EdgeTable et2 (et);
|
|
et2.translate (x, y);
|
|
|
|
fillEdgeTable (et2);
|
|
}
|
|
}
|
|
|
|
void drawLine (const Line <float>& line)
|
|
{
|
|
Path p;
|
|
p.addLineSegment (line, 1.0f);
|
|
fillPath (p, AffineTransform::identity);
|
|
}
|
|
|
|
//==============================================================================
|
|
void drawImage (const Image& image, const AffineTransform& trans)
|
|
{
|
|
if (clip == nullptr || fillType.colour.isTransparent())
|
|
return;
|
|
|
|
const Rectangle<int> clipBounds (clip->getClipBounds());
|
|
const AffineTransform t (transform.getTransformWith (trans));
|
|
const float alpha = fillType.colour.getFloatAlpha();
|
|
|
|
if (t.isOnlyTranslation())
|
|
{
|
|
int tx = (int) (t.getTranslationX() * 256.0f);
|
|
int ty = (int) (t.getTranslationY() * 256.0f);
|
|
|
|
if (((tx | ty) & 0xf8) == 0)
|
|
{
|
|
tx = ((tx + 128) >> 8);
|
|
ty = ((ty + 128) >> 8);
|
|
|
|
clip->drawImage (image, t, alpha, Rectangle<int> (tx, ty, image.getWidth(), image.getHeight()), nullptr);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (! t.isSingularity())
|
|
{
|
|
Path p;
|
|
p.addRectangle (image.getBounds());
|
|
EdgeTable et (clipBounds, p, t);
|
|
|
|
clip->drawImage (image, t, alpha, clipBounds, &et);
|
|
}
|
|
}
|
|
|
|
void setFillType (const FillType& newFill)
|
|
{
|
|
fillType = newFill;
|
|
state->textureCache.resetGradient();
|
|
}
|
|
|
|
//==============================================================================
|
|
ClipRegionBase::Ptr clip;
|
|
RenderingHelpers::TranslationOrTransform transform;
|
|
Font font;
|
|
FillType fillType;
|
|
Graphics::ResamplingQuality interpolationQuality;
|
|
GLState* state;
|
|
|
|
private:
|
|
float transparencyLayerAlpha;
|
|
Image transparencyLayer;
|
|
ScopedPointer<Target> previousTarget;
|
|
|
|
void cloneClipIfMultiplyReferenced()
|
|
{
|
|
if (clip->getReferenceCount() > 1)
|
|
clip = clip->clone();
|
|
}
|
|
|
|
FillType getFillType() const
|
|
{
|
|
return fillType.transformed (transform.getTransform());
|
|
}
|
|
|
|
void fillEdgeTable (EdgeTable& et) const
|
|
{
|
|
clip->fillEdgeTable (et, getFillType());
|
|
}
|
|
|
|
SavedState& operator= (const SavedState&);
|
|
};
|
|
|
|
//==============================================================================
|
|
class ShaderContext : public LowLevelGraphicsContext
|
|
{
|
|
public:
|
|
ShaderContext (const Target& target)
|
|
: glState (target), stack (new SavedState (&glState))
|
|
{}
|
|
|
|
bool isVectorDevice() const { return false; }
|
|
void setOrigin (int x, int y) { stack->transform.setOrigin (x, y); }
|
|
void addTransform (const AffineTransform& t) { stack->transform.addTransform (t); }
|
|
float getScaleFactor() { return stack->transform.getScaleFactor(); }
|
|
Rectangle<int> getClipBounds() const { return stack->getClipBounds(); }
|
|
bool isClipEmpty() const { return stack->clip == nullptr; }
|
|
bool clipRegionIntersects (const Rectangle<int>& r) { return stack->clipRegionIntersects (r); }
|
|
bool clipToRectangle (const Rectangle<int>& r) { return stack->clipToRectangle (r); }
|
|
bool clipToRectangleList (const RectangleList& r) { return stack->clipToRectangleList (r); }
|
|
void excludeClipRectangle (const Rectangle<int>& r) { stack->excludeClipRectangle (r); }
|
|
void clipToPath (const Path& path, const AffineTransform& t) { stack->clipToPath (path, t); }
|
|
void clipToImageAlpha (const Image& im, const AffineTransform& t) { stack->clipToImageAlpha (im, t); }
|
|
void saveState() { stack.save(); }
|
|
void restoreState() { stack.restore(); }
|
|
void beginTransparencyLayer (float opacity) { stack.beginTransparencyLayer (opacity); }
|
|
void endTransparencyLayer() { stack.endTransparencyLayer(); }
|
|
void setFill (const FillType& fillType) { stack->setFillType (fillType); }
|
|
void setOpacity (float newOpacity) { stack->fillType.setOpacity (newOpacity); }
|
|
void setInterpolationQuality (Graphics::ResamplingQuality quality) { stack->interpolationQuality = quality; }
|
|
void fillRect (const Rectangle<int>& r, bool replace) { stack->fillRect (r, replace); }
|
|
void fillPath (const Path& path, const AffineTransform& t) { stack->fillPath (path, t); }
|
|
void drawImage (const Image& im, const AffineTransform& t) { stack->drawImage (im, t); }
|
|
void drawVerticalLine (int x, float top, float bottom) { if (top < bottom) stack->fillRect (Rectangle<float> ((float) x, top, 1.0f, bottom - top)); }
|
|
void drawHorizontalLine (int y, float left, float right) { if (left < right) stack->fillRect (Rectangle<float> (left, (float) y, right - left, 1.0f)); }
|
|
void drawGlyph (int glyphNumber, const AffineTransform& t) { stack->drawGlyph (glyphNumber, t); }
|
|
void drawLine (const Line <float>& line) { stack->drawLine (line); }
|
|
void setFont (const Font& newFont) { stack->font = newFont; }
|
|
const Font& getFont() { return stack->font; }
|
|
|
|
private:
|
|
GLState glState;
|
|
RenderingHelpers::SavedStateStack<SavedState> stack;
|
|
|
|
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ShaderContext)
|
|
};
|
|
|
|
#endif
|
|
|
|
class NonShaderContext : public LowLevelGraphicsSoftwareRenderer
|
|
{
|
|
public:
|
|
NonShaderContext (const Target& target_, const Image& image_)
|
|
: LowLevelGraphicsSoftwareRenderer (image_), target (target_), image (image_)
|
|
{}
|
|
|
|
~NonShaderContext()
|
|
{
|
|
JUCE_CHECK_OPENGL_ERROR
|
|
const GLuint previousFrameBufferTarget = OpenGLFrameBuffer::getCurrentFrameBufferTarget();
|
|
|
|
#if ! JUCE_ANDROID
|
|
target.context.extensions.glActiveTexture (GL_TEXTURE0);
|
|
glEnable (GL_TEXTURE_2D);
|
|
clearGLError();
|
|
#endif
|
|
|
|
OpenGLTexture texture;
|
|
texture.loadImage (image);
|
|
texture.bind();
|
|
|
|
target.makeActive();
|
|
target.context.copyTexture (target.bounds, Rectangle<int> (texture.getWidth(),
|
|
texture.getHeight()),
|
|
target.bounds.getWidth(), target.bounds.getHeight());
|
|
glBindTexture (GL_TEXTURE_2D, 0);
|
|
|
|
#if JUCE_WINDOWS
|
|
if (target.context.extensions.glBindFramebuffer != nullptr)
|
|
#endif
|
|
target.context.extensions.glBindFramebuffer (GL_FRAMEBUFFER, previousFrameBufferTarget);
|
|
|
|
JUCE_CHECK_OPENGL_ERROR
|
|
}
|
|
|
|
private:
|
|
Target target;
|
|
Image image;
|
|
|
|
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (NonShaderContext)
|
|
};
|
|
|
|
LowLevelGraphicsContext* createOpenGLContext (const Target&);
|
|
LowLevelGraphicsContext* createOpenGLContext (const Target& target)
|
|
{
|
|
#if JUCE_USE_OPENGL_SHADERS
|
|
if (target.context.areShadersAvailable())
|
|
return new ShaderContext (target);
|
|
#endif
|
|
|
|
Image tempImage (Image::ARGB, target.bounds.getWidth(), target.bounds.getHeight(), true, SoftwareImageType());
|
|
return new NonShaderContext (target, tempImage);
|
|
}
|
|
|
|
}
|
|
|
|
//==============================================================================
|
|
LowLevelGraphicsContext* createOpenGLGraphicsContext (OpenGLContext& context, int width, int height)
|
|
{
|
|
return createOpenGLGraphicsContext (context, context.getFrameBufferID(), width, height);
|
|
}
|
|
|
|
LowLevelGraphicsContext* createOpenGLGraphicsContext (OpenGLContext& context, OpenGLFrameBuffer& target)
|
|
{
|
|
return OpenGLRendering::createOpenGLContext (OpenGLRendering::Target (context, target, Point<int>()));
|
|
}
|
|
|
|
LowLevelGraphicsContext* createOpenGLGraphicsContext (OpenGLContext& context, unsigned int frameBufferID, int width, int height)
|
|
{
|
|
using namespace OpenGLRendering;
|
|
return OpenGLRendering::createOpenGLContext (OpenGLRendering::Target (context, frameBufferID, width, height));
|
|
}
|