mirror of
https://github.com/juce-framework/JUCE.git
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1738 lines
63 KiB
C++
1738 lines
63 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2013 - Raw Material Software Ltd.
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Permission is granted to use this software under the terms of either:
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a) the GPL v2 (or any later version)
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b) the Affero GPL v3
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Details of these licenses can be found 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.juce.com 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 TextureInfo
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{
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GLuint textureID;
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int imageWidth, imageHeight;
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float fullWidthProportion, fullHeightProportion;
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};
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//==============================================================================
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// This list persists in the OpenGLContext, and will re-use cached textures which
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// are created from Images.
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struct CachedImageList : public ReferenceCountedObject,
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private ImagePixelData::Listener
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{
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CachedImageList (size_t totalCacheSizeInPixels = 8 * 1024 * 1024) noexcept
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: totalSize (0), maxCacheSize (totalCacheSizeInPixels) {}
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static CachedImageList* get (OpenGLContext& context)
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{
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const char cacheValueID[] = "CachedImages";
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CachedImageList* list = static_cast<CachedImageList*> (context.getAssociatedObject (cacheValueID));
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if (list == nullptr)
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{
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list = new CachedImageList();
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context.setAssociatedObject (cacheValueID, list);
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}
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return list;
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}
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TextureInfo getTextureFor (const Image& image)
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{
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ImagePixelData* const pixelData = image.getPixelData();
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CachedImage* c = findCachedImage (pixelData);
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if (c == nullptr)
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{
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if (OpenGLFrameBuffer* const fb = OpenGLImageType::getFrameBufferFrom (image))
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{
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TextureInfo t;
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t.textureID = fb->getTextureID();
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t.imageWidth = image.getWidth();
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t.imageHeight = image.getHeight();
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t.fullWidthProportion = 1.0f;
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t.fullHeightProportion = 1.0f;
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return t;
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}
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c = images.add (new CachedImage (*this, pixelData));
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totalSize += c->imageSize;
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while (totalSize > maxCacheSize && images.size() > 1 && totalSize > 0)
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removeOldestItem();
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}
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return c->getTextureInfo();
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}
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typedef ReferenceCountedObjectPtr<CachedImageList> Ptr;
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private:
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void imageDataChanged (ImagePixelData* im) override
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{
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if (CachedImage* c = findCachedImage (im))
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c->texture.release();
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}
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void imageDataBeingDeleted (ImagePixelData* im) override
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{
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for (int i = images.size(); --i >= 0;)
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{
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if (images.getUnchecked(i)->pixelData == im)
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{
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totalSize -= images.getUnchecked(i)->imageSize;
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images.remove (i);
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break;
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}
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}
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}
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struct CachedImage
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{
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CachedImage (CachedImageList& list, ImagePixelData* im)
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: owner (list), pixelData (im),
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lastUsed (Time::getCurrentTime()),
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imageSize (im->width * im->height)
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{
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pixelData->listeners.add (&owner);
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}
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~CachedImage()
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{
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if (pixelData != nullptr)
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pixelData->listeners.remove (&owner);
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}
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TextureInfo getTextureInfo()
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{
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TextureInfo t;
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if (texture.getTextureID() == 0)
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texture.loadImage (Image (pixelData));
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t.textureID = texture.getTextureID();
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t.imageWidth = pixelData->width;
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t.imageHeight = pixelData->height;
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t.fullWidthProportion = t.imageWidth / (float) texture.getWidth();
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t.fullHeightProportion = t.imageHeight / (float) texture.getHeight();
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lastUsed = Time::getCurrentTime();
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return t;
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}
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CachedImageList& owner;
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ImagePixelData* pixelData;
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OpenGLTexture texture;
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Time lastUsed;
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const size_t imageSize;
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (CachedImage)
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};
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OwnedArray<CachedImage> images;
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size_t totalSize, maxCacheSize;
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CachedImage* findCachedImage (ImagePixelData* const pixelData) const
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{
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for (int i = 0; i < images.size(); ++i)
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{
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CachedImage* c = images.getUnchecked(i);
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if (c->pixelData == pixelData)
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return c;
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}
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return nullptr;
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}
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void removeOldestItem()
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{
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CachedImage* oldest = nullptr;
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for (int i = 0; i < images.size(); ++i)
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{
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CachedImage* c = images.getUnchecked(i);
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if (oldest == nullptr || c->lastUsed < oldest->lastUsed)
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oldest = c;
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}
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if (oldest != nullptr)
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{
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totalSize -= oldest->imageSize;
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images.removeObject (oldest);
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}
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}
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (CachedImageList)
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};
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//==============================================================================
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struct Target
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{
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Target (OpenGLContext& c, GLuint fbID, int width, int height) noexcept
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: context (c), frameBufferID (fbID), bounds (width, height)
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{}
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Target (OpenGLContext& c, OpenGLFrameBuffer& fb, 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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//==============================================================================
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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>& clipRegion)
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: clip (clipRegion.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 texture, const Rectangle<int> r, const Rectangle<int> clipRegion) noexcept
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: textureID (texture), area (r), clip (clipRegion)
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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 ((size_t) (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, (size_t) 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, (size_t) 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.addVertexShader ("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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"}");
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program.addFragmentShader (fragmentShader);
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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 ((GLuint) positionAttribute.attributeID, 2, GL_SHORT, GL_FALSE, 8, (void*) 0);
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context.extensions.glVertexAttribPointer ((GLuint) colourAttribute.attributeID, 4, GL_UNSIGNED_BYTE, GL_TRUE, 8, (void*) 4);
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context.extensions.glEnableVertexAttribArray ((GLuint) positionAttribute.attributeID);
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context.extensions.glEnableVertexAttribArray ((GLuint) 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 ((GLuint) positionAttribute.attributeID);
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context.extensions.glDisableVertexAttribArray ((GLuint) 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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|
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#define JUCE_DECLARE_LINEAR_UNIFORMS "uniform sampler2D gradientTexture;" \
|
|
"uniform " JUCE_MEDIUMP " vec4 gradientInfo;" \
|
|
JUCE_DECLARE_VARYING_COLOUR JUCE_DECLARE_VARYING_PIXELPOS
|
|
#define JUCE_CALC_LINEAR_GRAD_POS1 JUCE_MEDIUMP " float gradientPos = (pixelPos.y - (gradientInfo.y + (gradientInfo.z * (pixelPos.x - gradientInfo.x)))) / gradientInfo.w;"
|
|
#define JUCE_CALC_LINEAR_GRAD_POS2 JUCE_MEDIUMP " float gradientPos = (pixelPos.x - (gradientInfo.x + (gradientInfo.z * (pixelPos.y - gradientInfo.y)))) / gradientInfo.w;"
|
|
|
|
struct LinearGradient1Program : public ShaderBase
|
|
{
|
|
LinearGradient1Program (OpenGLContext& context)
|
|
: ShaderBase (context, JUCE_DECLARE_LINEAR_UNIFORMS // gradientInfo: x = x1, y = y1, z = (y2 - y1) / (x2 - x1), w = length
|
|
JUCE_DECLARE_SWIZZLE_FUNCTION
|
|
"void main()"
|
|
"{"
|
|
JUCE_CALC_LINEAR_GRAD_POS1
|
|
"gl_FragColor = " JUCE_GET_TEXTURE_COLOUR ";"
|
|
"}"),
|
|
gradientParams (program)
|
|
{}
|
|
|
|
LinearGradientParams gradientParams;
|
|
};
|
|
|
|
struct LinearGradient1MaskedProgram : public ShaderBase
|
|
{
|
|
LinearGradient1MaskedProgram (OpenGLContext& context)
|
|
: ShaderBase (context, JUCE_DECLARE_LINEAR_UNIFORMS // gradientInfo: x = x1, y = y1, z = (y2 - y1) / (x2 - x1), w = length
|
|
JUCE_DECLARE_MASK_UNIFORMS JUCE_DECLARE_SWIZZLE_FUNCTION
|
|
"void main()"
|
|
"{"
|
|
JUCE_CALC_LINEAR_GRAD_POS1
|
|
"gl_FragColor = " JUCE_GET_TEXTURE_COLOUR " * " JUCE_GET_MASK_ALPHA ";"
|
|
"}"),
|
|
gradientParams (program),
|
|
maskParams (program)
|
|
{}
|
|
|
|
LinearGradientParams gradientParams;
|
|
MaskedShaderParams maskParams;
|
|
};
|
|
|
|
struct LinearGradient2Program : public ShaderBase
|
|
{
|
|
LinearGradient2Program (OpenGLContext& context)
|
|
: ShaderBase (context, JUCE_DECLARE_LINEAR_UNIFORMS // gradientInfo: x = x1, y = y1, z = (x2 - x1) / (y2 - y1), y = y1, w = length
|
|
JUCE_DECLARE_SWIZZLE_FUNCTION
|
|
"void main()"
|
|
"{"
|
|
JUCE_CALC_LINEAR_GRAD_POS2
|
|
"gl_FragColor = " JUCE_GET_TEXTURE_COLOUR ";"
|
|
"}"),
|
|
gradientParams (program)
|
|
{}
|
|
|
|
LinearGradientParams gradientParams;
|
|
};
|
|
|
|
struct LinearGradient2MaskedProgram : public ShaderBase
|
|
{
|
|
LinearGradient2MaskedProgram (OpenGLContext& context)
|
|
: ShaderBase (context, JUCE_DECLARE_LINEAR_UNIFORMS // gradientInfo: x = x1, y = y1, z = (x2 - x1) / (y2 - y1), y = y1, w = length
|
|
JUCE_DECLARE_MASK_UNIFORMS JUCE_DECLARE_SWIZZLE_FUNCTION
|
|
"void main()"
|
|
"{"
|
|
JUCE_CALC_LINEAR_GRAD_POS2
|
|
"gl_FragColor = " JUCE_GET_TEXTURE_COLOUR " * " JUCE_GET_MASK_ALPHA ";"
|
|
"}"),
|
|
gradientParams (program),
|
|
maskParams (program)
|
|
{}
|
|
|
|
LinearGradientParams gradientParams;
|
|
MaskedShaderParams maskParams;
|
|
};
|
|
|
|
//==============================================================================
|
|
struct ImageParams
|
|
{
|
|
ImageParams (OpenGLShaderProgram& program)
|
|
: imageTexture (program, "imageTexture"),
|
|
matrix (program, "matrix"),
|
|
imageLimits (program, "imageLimits")
|
|
{}
|
|
|
|
void setMatrix (const AffineTransform& trans,
|
|
const int imageWidth, const int imageHeight,
|
|
float fullWidthProportion, float fullHeightProportion,
|
|
const float targetX, const float targetY,
|
|
const bool isForTiling) const
|
|
{
|
|
const AffineTransform t (trans.translated (-targetX, -targetY)
|
|
.inverted().scaled (fullWidthProportion / imageWidth,
|
|
fullHeightProportion / imageHeight));
|
|
|
|
const GLfloat m[] = { t.mat00, t.mat01, t.mat02, t.mat10, t.mat11, t.mat12 };
|
|
matrix.set (m, 6);
|
|
|
|
if (isForTiling)
|
|
{
|
|
fullWidthProportion -= 0.5f / imageWidth;
|
|
fullHeightProportion -= 0.5f / imageHeight;
|
|
}
|
|
|
|
imageLimits.set (fullWidthProportion, fullHeightProportion);
|
|
}
|
|
|
|
void setMatrix (const AffineTransform& trans, const TextureInfo& textureInfo,
|
|
const float targetX, const float targetY,
|
|
bool isForTiling) const
|
|
{
|
|
setMatrix (trans,
|
|
textureInfo.imageWidth, textureInfo.imageHeight,
|
|
textureInfo.fullWidthProportion, textureInfo.fullHeightProportion,
|
|
targetX, targetY, isForTiling);
|
|
}
|
|
|
|
OpenGLShaderProgram::Uniform imageTexture, matrix, imageLimits;
|
|
};
|
|
|
|
#define JUCE_DECLARE_IMAGE_UNIFORMS "uniform sampler2D imageTexture;" \
|
|
"uniform " JUCE_MEDIUMP " vec2 imageLimits;" \
|
|
JUCE_DECLARE_MATRIX_UNIFORM JUCE_DECLARE_VARYING_COLOUR JUCE_DECLARE_VARYING_PIXELPOS
|
|
#define JUCE_GET_IMAGE_PIXEL "swizzleRGBOrder (texture2D (imageTexture, vec2 (texturePos.x, 1.0 - texturePos.y)))"
|
|
#define JUCE_CLAMP_TEXTURE_COORD JUCE_HIGHP " vec2 texturePos = clamp (" JUCE_MATRIX_TIMES_FRAGCOORD ", vec2 (0, 0), imageLimits);"
|
|
#define JUCE_MOD_TEXTURE_COORD JUCE_HIGHP " vec2 texturePos = mod (" JUCE_MATRIX_TIMES_FRAGCOORD ", imageLimits);"
|
|
|
|
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 >= -roundingError"
|
|
"&& texturePos.y >= -roundingError"
|
|
"&& texturePos.x <= imageLimits.x + roundingError"
|
|
"&& texturePos.y <= imageLimits.y + 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& q, const PixelARGB c) noexcept
|
|
: quadQueue (q), colour (c)
|
|
{}
|
|
|
|
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& q, const PixelARGB c) noexcept
|
|
: quadQueue (q), colour (c)
|
|
{}
|
|
|
|
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 (-1), context (c)
|
|
{}
|
|
|
|
void clear() noexcept
|
|
{
|
|
zeromem (currentTextureID, sizeof (currentTextureID));
|
|
}
|
|
|
|
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 ((GLenum) (GL_TEXTURE0 + index));
|
|
JUCE_CHECK_OPENGL_ERROR
|
|
}
|
|
}
|
|
|
|
void bindTexture (const GLuint textureID) noexcept
|
|
{
|
|
jassert (currentActiveTexture >= 0);
|
|
|
|
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 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.glBindBuffer (GL_ARRAY_BUFFER, 0);
|
|
context.extensions.glBindBuffer (GL_ELEMENT_ARRAY_BUFFER, 0);
|
|
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_ELEMENT_ARRAY_BUFFER, buffers[0]);
|
|
context.extensions.glBufferData (GL_ELEMENT_ARRAY_BUFFER, sizeof (indexData), indexData, GL_STATIC_DRAW);
|
|
context.extensions.glBindBuffer (GL_ARRAY_BUFFER, buffers[1]);
|
|
context.extensions.glBufferData (GL_ARRAY_BUFFER, sizeof (vertexData), vertexData, GL_STREAM_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<int>& 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<int>& 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);
|
|
}
|
|
}
|
|
|
|
template <class IteratorType>
|
|
void add (const IteratorType& 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;
|
|
};
|
|
|
|
enum { numQuads = 256 };
|
|
|
|
GLuint buffers[2];
|
|
VertexInfo vertexData [numQuads * 4];
|
|
GLushort indexData [numQuads * 6];
|
|
const OpenGLContext& context;
|
|
int numVertices;
|
|
|
|
void draw() noexcept
|
|
{
|
|
context.extensions.glBufferSubData (GL_ARRAY_BUFFER, 0, (GLsizeiptr) ((size_t) numVertices * sizeof (VertexInfo)), vertexData);
|
|
// NB: If you get a random crash in here and are running in a Parallels VM, it seems to be a bug in
|
|
// their driver.. Can't find a workaround unfortunately.
|
|
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);
|
|
}
|
|
}
|
|
|
|
~CurrentShader()
|
|
{
|
|
jassert (activeShader == nullptr);
|
|
}
|
|
|
|
void setShader (const Rectangle<int>& bounds, ShaderQuadQueue& quadQueue, ShaderPrograms::ShaderBase& shader)
|
|
{
|
|
if (activeShader != &shader)
|
|
{
|
|
clearShader (quadQueue);
|
|
|
|
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& t) noexcept
|
|
: target (t),
|
|
activeTextures (t.context),
|
|
currentShader (t.context),
|
|
shaderQuadQueue (t.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
|
|
activeTextures.clear();
|
|
shaderQuadQueue.initialise();
|
|
cachedImageList = CachedImageList::get (t.context);
|
|
JUCE_CHECK_OPENGL_ERROR
|
|
}
|
|
|
|
~GLState()
|
|
{
|
|
flush();
|
|
target.context.extensions.glBindFramebuffer (GL_FRAMEBUFFER, previousFrameBufferTarget);
|
|
}
|
|
|
|
void flush()
|
|
{
|
|
shaderQuadQueue.flush();
|
|
currentShader.clearShader (shaderQuadQueue);
|
|
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 ((GLuint) maskTextureID);
|
|
activeTextures.setActiveTexture (0);
|
|
textureCache.bindTextureForGradient (activeTextures, g);
|
|
}
|
|
else
|
|
{
|
|
activeTextures.setSingleTextureMode (shaderQuadQueue);
|
|
textureCache.bindTextureForGradient (activeTextures, g);
|
|
}
|
|
|
|
const AffineTransform t (transform.translated (0.5f - target.bounds.getX(),
|
|
0.5f - 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 TextureInfo& textureInfo, const AffineTransform& transform,
|
|
const int maskTextureID, const Rectangle<int>* const maskArea, bool isTiledFill)
|
|
{
|
|
blendMode.setPremultipliedBlendingMode (shaderQuadQueue);
|
|
|
|
ShaderPrograms* const programs = currentShader.programs;
|
|
|
|
const ShaderPrograms::MaskedShaderParams* maskParams = nullptr;
|
|
const ShaderPrograms::ImageParams* imageParams;
|
|
|
|
if (maskArea != nullptr)
|
|
{
|
|
activeTextures.setTwoTextureMode (shaderQuadQueue, textureInfo.textureID, (GLuint) maskTextureID);
|
|
|
|
if (isTiledFill)
|
|
{
|
|
setShader (programs->tiledImageMasked);
|
|
imageParams = &programs->tiledImageMasked.imageParams;
|
|
maskParams = &programs->tiledImageMasked.maskParams;
|
|
}
|
|
else
|
|
{
|
|
setShader (programs->imageMasked);
|
|
imageParams = &programs->imageMasked.imageParams;
|
|
maskParams = &programs->imageMasked.maskParams;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
activeTextures.setSingleTextureMode (shaderQuadQueue);
|
|
activeTextures.bindTexture (textureInfo.textureID);
|
|
|
|
if (isTiledFill)
|
|
{
|
|
setShader (programs->tiledImage);
|
|
imageParams = &programs->tiledImage.imageParams;
|
|
}
|
|
else
|
|
{
|
|
setShader (programs->image);
|
|
imageParams = &programs->image.imageParams;
|
|
}
|
|
}
|
|
|
|
imageParams->setMatrix (transform, textureInfo, (float) target.bounds.getX(), (float) target.bounds.getY(), isTiledFill);
|
|
|
|
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;
|
|
|
|
CachedImageList::Ptr cachedImageList;
|
|
|
|
private:
|
|
GLuint previousFrameBufferTarget;
|
|
};
|
|
|
|
//==============================================================================
|
|
class SavedState : public RenderingHelpers::SavedStateBase<SavedState>
|
|
{
|
|
typedef RenderingHelpers::SavedStateBase<SavedState> BaseClass;
|
|
|
|
public:
|
|
SavedState (GLState* const s)
|
|
: BaseClass (s->target.bounds), state (s)
|
|
{}
|
|
|
|
SavedState (const SavedState& other)
|
|
: BaseClass (other), font (other.font),
|
|
state (other.state), transparencyLayer (other.transparencyLayer),
|
|
previousTarget (other.previousTarget.createCopy())
|
|
{}
|
|
|
|
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->renderImageUntransformed (*this, finishedLayerState.transparencyLayer,
|
|
(int) (finishedLayerState.transparencyLayerAlpha * 255.0f),
|
|
clipBounds.getX(), clipBounds.getY(), false);
|
|
}
|
|
}
|
|
|
|
typedef RenderingHelpers::GlyphCache <RenderingHelpers::CachedGlyphEdgeTable <SavedState>, SavedState> GlyphCacheType;
|
|
|
|
void drawGlyph (int glyphNumber, const AffineTransform& trans)
|
|
{
|
|
if (clip != nullptr)
|
|
{
|
|
if (trans.isOnlyTranslation() && ! transform.isRotated)
|
|
{
|
|
GlyphCacheType& cache = GlyphCacheType::getInstance();
|
|
|
|
Point<float> pos (trans.getTranslationX(), trans.getTranslationY());
|
|
|
|
if (transform.isOnlyTranslated)
|
|
{
|
|
cache.drawGlyph (*this, font, glyphNumber, pos + transform.offset.toFloat());
|
|
}
|
|
else
|
|
{
|
|
pos = transform.transformed (pos);
|
|
|
|
Font f (font);
|
|
f.setHeight (font.getHeight() * transform.complexTransform.mat11);
|
|
|
|
const float xScale = transform.complexTransform.mat00 / transform.complexTransform.mat11;
|
|
if (std::abs (xScale - 1.0f) > 0.01f)
|
|
f.setHorizontalScale (xScale);
|
|
|
|
cache.drawGlyph (*this, f, glyphNumber, pos);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
const float fontHeight = font.getHeight();
|
|
|
|
AffineTransform t (transform.getTransformWith (AffineTransform::scale (fontHeight * font.getHorizontalScale(), fontHeight)
|
|
.followedBy (trans)));
|
|
|
|
const ScopedPointer<EdgeTable> et (font.getTypeface()->getEdgeTableForGlyph (glyphNumber, t, fontHeight));
|
|
|
|
if (et != nullptr)
|
|
fillShape (new EdgeTableRegionType (*et), false);
|
|
}
|
|
}
|
|
}
|
|
|
|
Rectangle<int> getMaximumBounds() const { return state->target.bounds; }
|
|
|
|
void setFillType (const FillType& newFill)
|
|
{
|
|
BaseClass::setFillType (newFill);
|
|
state->textureCache.resetGradient();
|
|
}
|
|
|
|
//==============================================================================
|
|
template <typename IteratorType>
|
|
void renderImageTransformed (IteratorType& iter, const Image& src, const int alpha,
|
|
const AffineTransform& trans, Graphics::ResamplingQuality, bool tiledFill) const
|
|
{
|
|
state->shaderQuadQueue.flush();
|
|
state->setShaderForTiledImageFill (state->cachedImageList->getTextureFor (src), trans, 0, nullptr, tiledFill);
|
|
|
|
state->shaderQuadQueue.add (iter, PixelARGB ((uint8) alpha, (uint8) alpha, (uint8) alpha, (uint8) alpha));
|
|
state->shaderQuadQueue.flush();
|
|
|
|
state->currentShader.clearShader (state->shaderQuadQueue);
|
|
}
|
|
|
|
template <typename IteratorType>
|
|
void renderImageUntransformed (IteratorType& iter, const Image& src, const int alpha, int x, int y, bool tiledFill) const
|
|
{
|
|
renderImageTransformed (iter, src, alpha, AffineTransform::translation ((float) x, (float) y),
|
|
Graphics::lowResamplingQuality, tiledFill);
|
|
}
|
|
|
|
template <typename IteratorType>
|
|
void fillWithSolidColour (IteratorType& iter, const PixelARGB colour, bool replaceContents) const
|
|
{
|
|
state->activeTextures.disableTextures (state->shaderQuadQueue);
|
|
state->blendMode.setBlendMode (state->shaderQuadQueue, replaceContents);
|
|
state->setShader (state->currentShader.programs->solidColourProgram);
|
|
state->shaderQuadQueue.add (iter, colour);
|
|
}
|
|
|
|
template <typename IteratorType>
|
|
void fillWithGradient (IteratorType& iter, ColourGradient& gradient, const AffineTransform& trans, bool /*isIdentity*/) const
|
|
{
|
|
state->setShaderForGradientFill (gradient, trans, 0, nullptr);
|
|
state->shaderQuadQueue.add (iter, fillType.colour.getPixelARGB());
|
|
}
|
|
|
|
//==============================================================================
|
|
Font font;
|
|
GLState* state;
|
|
|
|
private:
|
|
Image transparencyLayer;
|
|
ScopedPointer<Target> previousTarget;
|
|
|
|
SavedState& operator= (const SavedState&);
|
|
};
|
|
|
|
|
|
//==============================================================================
|
|
class ShaderContext : public RenderingHelpers::StackBasedLowLevelGraphicsContext <SavedState>
|
|
{
|
|
public:
|
|
ShaderContext (const Target& target) : glState (target)
|
|
{
|
|
stack.initialise (new SavedState (&glState));
|
|
}
|
|
|
|
private:
|
|
GLState glState;
|
|
|
|
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ShaderContext)
|
|
};
|
|
|
|
class NonShaderContext : public LowLevelGraphicsSoftwareRenderer
|
|
{
|
|
public:
|
|
NonShaderContext (const Target& t, const Image& im)
|
|
: LowLevelGraphicsSoftwareRenderer (im), target (t), image (im)
|
|
{}
|
|
|
|
~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(),
|
|
false);
|
|
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 (target.context.areShadersAvailable())
|
|
return new ShaderContext (target);
|
|
|
|
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));
|
|
}
|
|
|
|
void clearOpenGLGlyphCache();
|
|
void clearOpenGLGlyphCache()
|
|
{
|
|
OpenGLRendering::SavedState::GlyphCacheType::getInstance().reset();
|
|
}
|