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Merge 0945558925 into 29396c22c9
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329
modules/juce_graphics/effects/juce_StackShadowEffect.cpp
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329
modules/juce_graphics/effects/juce_StackShadowEffect.cpp
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@ -0,0 +1,329 @@
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/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2020 - Raw Material Software Limited
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JUCE is an open source library subject to commercial or open-source
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licensing.
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By using JUCE, you agree to the terms of both the JUCE 6 End-User License
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Agreement and JUCE Privacy Policy (both effective as of the 16th June 2020).
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End User License Agreement: www.juce.com/juce-6-licence
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Privacy Policy: www.juce.com/juce-privacy-policy
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Or: You may also use this code under the terms of the GPL v3 (see
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www.gnu.org/licenses).
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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//=================================================================================
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// Code below has been borrowed from the Gin (https://github.com/FigBug/Gin) project.
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// Copyright(c) 2018, Roland Rabien
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static unsigned short const stackblur_mul[255] =
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{
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512,512,456,512,328,456,335,512,405,328,271,456,388,335,292,512,
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454,405,364,328,298,271,496,456,420,388,360,335,312,292,273,512,
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482,454,428,405,383,364,345,328,312,298,284,271,259,496,475,456,
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437,420,404,388,374,360,347,335,323,312,302,292,282,273,265,512,
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497,482,468,454,441,428,417,405,394,383,373,364,354,345,337,328,
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320,312,305,298,291,284,278,271,265,259,507,496,485,475,465,456,
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446,437,428,420,412,404,396,388,381,374,367,360,354,347,341,335,
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329,323,318,312,307,302,297,292,287,282,278,273,269,265,261,512,
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505,497,489,482,475,468,461,454,447,441,435,428,422,417,411,405,
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399,394,389,383,378,373,368,364,359,354,350,345,341,337,332,328,
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324,320,316,312,309,305,301,298,294,291,287,284,281,278,274,271,
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268,265,262,259,257,507,501,496,491,485,480,475,470,465,460,456,
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451,446,442,437,433,428,424,420,416,412,408,404,400,396,392,388,
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385,381,377,374,370,367,363,360,357,354,350,347,344,341,338,335,
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332,329,326,323,320,318,315,312,310,307,304,302,299,297,294,292,
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289,287,285,282,280,278,275,273,271,269,267,265,263,261,259
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};
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static unsigned char const stackblur_shr[255] =
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{
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9, 11, 12, 13, 13, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 17,
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17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18, 18, 18, 19,
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19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 20, 20, 20,
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20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 21,
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21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
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21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22, 22, 22,
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22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
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22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 23,
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23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23,
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23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23,
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23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23,
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23, 23, 23, 23, 23, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
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24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
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24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
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24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
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24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24
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};
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// The Stack Blur Algorithm was invented by Mario Klingemann,
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// mario@quasimondo.com and described here:
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// http://incubator.quasimondo.com/processing/fast_blur_deluxe.php
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// Stackblur algorithm by Mario Klingemann
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// Details here:
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// http://www.quasimondo.com/StackBlurForCanvas/StackBlurDemo.html
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// C++ implemenation base from:
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// https://gist.github.com/benjamin9999/3809142
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// http://www.antigrain.com/__code/include/agg_blur.h.html
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static void applyStackBlur (Image& img, unsigned int radius)
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{
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const unsigned int w = (unsigned int)img.getWidth();
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const unsigned int h = (unsigned int)img.getHeight();
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Image::BitmapData data (img, Image::BitmapData::readWrite);
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radius = jlimit (2u, 254u, radius);
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unsigned char stack[(254 * 2 + 1) * 1];
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unsigned int x, y, xp, yp, i, sp, stack_start;
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unsigned char* stack_ptr = nullptr;
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unsigned char* src_ptr = nullptr;
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unsigned char* dst_ptr = nullptr;
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unsigned long sum, sum_in, sum_out;
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unsigned int wm = w - 1;
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unsigned int hm = h - 1;
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unsigned int w1 = (unsigned int) data.lineStride;
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unsigned int div = (unsigned int) (radius * 2) + 1;
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unsigned int mul_sum = stackblur_mul[radius];
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unsigned char shr_sum = stackblur_shr[radius];
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for (y = 0; y < h; ++y)
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{
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sum = sum_in = sum_out = 0;
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src_ptr = data.getLinePointer (int (y));
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for (i = 0; i <= radius; ++i)
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{
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stack_ptr = &stack[i];
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stack_ptr[0] = src_ptr[0];
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sum += src_ptr[0] * (i + 1);
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sum_out += src_ptr[0];
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}
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for (i = 1; i <= radius; ++i)
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{
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if (i <= wm)
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src_ptr += 1;
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stack_ptr = &stack[1 * (i + radius)];
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stack_ptr[0] = src_ptr[0];
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sum += src_ptr[0] * (radius + 1 - i);
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sum_in += src_ptr[0];
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}
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sp = radius;
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xp = radius;
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if (xp > wm)
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xp = wm;
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src_ptr = data.getLinePointer (int (y)) + (unsigned int)data.pixelStride * xp;
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dst_ptr = data.getLinePointer (int (y));
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for (x = 0; x < w; ++x)
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{
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dst_ptr[0] = (unsigned char)((sum * mul_sum) >> shr_sum);
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dst_ptr += 1;
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sum -= sum_out;
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stack_start = sp + div - radius;
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if (stack_start >= div)
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stack_start -= div;
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stack_ptr = &stack[1 * stack_start];
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sum_out -= stack_ptr[0];
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if (xp < wm)
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{
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src_ptr += 1;
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++xp;
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}
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stack_ptr[0] = src_ptr[0];
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sum_in += src_ptr[0];
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sum += sum_in;
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++sp;
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if (sp >= div)
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sp = 0;
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stack_ptr = &stack[sp*1];
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sum_out += stack_ptr[0];
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sum_in -= stack_ptr[0];
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}
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}
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for (x = 0; x < w; ++x)
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{
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sum = sum_in = sum_out = 0;
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src_ptr = data.getLinePointer (0) + (unsigned int)data.pixelStride * x;
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for (i = 0; i <= radius; ++i)
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{
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stack_ptr = &stack[i * 1];
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stack_ptr[0] = src_ptr[0];
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sum += src_ptr[0] * (i + 1);
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sum_out += src_ptr[0];
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}
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for (i = 1; i <= radius; ++i)
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{
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if (i <= hm)
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src_ptr += w1;
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stack_ptr = &stack[1 * (i + radius)];
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stack_ptr[0] = src_ptr[0];
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sum += src_ptr[0] * (radius + 1 - i);
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sum_in += src_ptr[0];
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}
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sp = radius;
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yp = radius;
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if (yp > hm)
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yp = hm;
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src_ptr = data.getLinePointer (int (yp)) + (unsigned int)data.pixelStride * x;
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dst_ptr = data.getLinePointer (0) + (unsigned int)data.pixelStride * x;
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for (y = 0; y < h; ++y)
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{
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dst_ptr[0] = (unsigned char)((sum * mul_sum) >> shr_sum);
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dst_ptr += w1;
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sum -= sum_out;
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stack_start = sp + div - radius;
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if (stack_start >= div)
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stack_start -= div;
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stack_ptr = &stack[1 * stack_start];
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sum_out -= stack_ptr[0];
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if (yp < hm)
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{
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src_ptr += w1;
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++yp;
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}
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stack_ptr[0] = src_ptr[0];
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sum_in += src_ptr[0];
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sum += sum_in;
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++sp;
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if (sp >= div)
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sp = 0;
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stack_ptr = &stack[sp * 1];
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sum_out += stack_ptr[0];
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sum_in -= stack_ptr[0];
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}
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}
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}
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//=================================================================================
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StackShadow::StackShadow (Colour shadowColour, Point<int> o, const int b, const int s) noexcept
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: colour (shadowColour), offset (o), blur (b), spread (s)
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{
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jassert (blur > 0);
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}
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void StackShadow::drawOuterShadowForPath (Graphics& g, const Path& path) const
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{
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jassert (blur > 0);
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const auto pathArea = path.getBounds().getSmallestIntegerContainer();
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auto area = (pathArea + offset)
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.expanded (blur + 1)
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.getIntersection (g.getClipBounds().expanded (blur + 1));
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if (area.getWidth() > 2 && area.getHeight() > 2)
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{
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Image renderedPath (Image::SingleChannel, area.getWidth(), area.getHeight(), true);
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{
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Graphics g2 (renderedPath);
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g2.setColour (Colours::white);
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auto t = AffineTransform::translation (static_cast<float> (offset.x - area.getX()),
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static_cast<float> (offset.y - area.getY()));
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auto s = AffineTransform::scale (1.f + (static_cast<float> (spread) / static_cast<float> (pathArea.getWidth())),
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1.f + (static_cast<float> (spread) / static_cast<float> (pathArea.getHeight())),
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area.getCentreX(),
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area.getCentreY());
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g2.fillPath (path, s.followedBy (t));
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}
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applyStackBlur (renderedPath, blur);
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g.setColour (colour);
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g.drawImageAt (renderedPath, area.getX(), area.getY(), true);
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}
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}
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void StackShadow::drawInnerShadowForPath (Graphics& g, const Path& path) const
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{
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jassert (blur > 0);
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jassert (spread >= 0);
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const auto pathArea = path.getBounds().getSmallestIntegerContainer();
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auto area = (pathArea + offset)
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.expanded (blur + 1)
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.getIntersection (g.getClipBounds().expanded (blur + 1));
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if (area.getWidth() > 2 && area.getHeight() > 2)
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{
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Image renderedPath (Image::SingleChannel, area.getWidth(), area.getHeight(), true);
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{
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Graphics g2 (renderedPath);
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g2.setColour (Colours::white);
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auto t = AffineTransform::translation (static_cast<float> (offset.x - area.getX()),
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static_cast<float> (offset.y - area.getY()));
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auto s = AffineTransform::scale (1.f - (static_cast<float> (spread) / static_cast<float> (pathArea.getWidth())),
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1.f - (static_cast<float> (spread) / static_cast<float> (pathArea.getHeight())),
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area.getCentreX(),
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area.getCentreY());
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g2.strokePath (path, PathStrokeType (static_cast<float> (2 * spread + 1)), s.followedBy(t));
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}
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applyStackBlur (renderedPath, blur);
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Graphics::ScopedSaveState save (g);
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g.reduceClipRegion (path);
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g.setColour (colour);
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g.drawImageAt (renderedPath, area.getX(), area.getY(), true);
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}
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}
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} // namespace juce
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58
modules/juce_graphics/effects/juce_StackShadowEffect.h
Normal file
58
modules/juce_graphics/effects/juce_StackShadowEffect.h
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@ -0,0 +1,58 @@
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/*
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||||
==============================================================================
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||||
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||||
This file is part of the JUCE library.
|
||||
Copyright (c) 2020 - Raw Material Software Limited
|
||||
|
||||
JUCE is an open source library subject to commercial or open-source
|
||||
licensing.
|
||||
|
||||
By using JUCE, you agree to the terms of both the JUCE 6 End-User License
|
||||
Agreement and JUCE Privacy Policy (both effective as of the 16th June 2020).
|
||||
|
||||
End User License Agreement: www.juce.com/juce-6-licence
|
||||
Privacy Policy: www.juce.com/juce-privacy-policy
|
||||
|
||||
Or: You may also use this code under the terms of the GPL v3 (see
|
||||
www.gnu.org/licenses).
|
||||
|
||||
JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
|
||||
EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
|
||||
DISCLAIMED.
|
||||
|
||||
==============================================================================
|
||||
*/
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||||
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||||
#pragma once
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||||
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namespace juce
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{
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struct JUCE_API StackShadow
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{
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/** Creates a default stack-shadow effect. */
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StackShadow() = default;
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/** Creates a stack-shadow object with the given parameters. */
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StackShadow (Colour shadowColour, Point<int> offset, int blur, int spread) noexcept;
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/** Renders a stack-shadow-based on the shape of a path. */
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void drawOuterShadowForPath (Graphics& g, const Path& path) const;
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/** Renders a stack-shadow-based inner-shadow on the shape of a path. */
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void drawInnerShadowForPath (Graphics& g, const Path& path) const;
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/** The colour with which to render the shadow. */
|
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Colour colour { 0x90000000 };
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/** The offset of the shadow. */
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Point<int> offset { 0, 0 };
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/** The ammount of blur of the shadow. */
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int blur { 4 };
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/** The spread of the shadow. */
|
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int spread { 0 };
|
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};
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||||
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||||
} // namespace juce
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||||
|
|
@ -204,6 +204,7 @@ extern "C"
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|||
#include "fonts/juce_GlyphArrangement.cpp"
|
||||
#include "fonts/juce_TextLayout.cpp"
|
||||
#include "effects/juce_DropShadowEffect.cpp"
|
||||
#include "effects/juce_StackShadowEffect.cpp"
|
||||
#include "effects/juce_GlowEffect.cpp"
|
||||
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||||
#if JUCE_UNIT_TESTS
|
||||
|
|
|
|||
|
|
@ -153,6 +153,7 @@ namespace juce
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|||
#include "contexts/juce_LowLevelGraphicsSoftwareRenderer.h"
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||||
#include "effects/juce_ImageEffectFilter.h"
|
||||
#include "effects/juce_DropShadowEffect.h"
|
||||
#include "effects/juce_StackShadowEffect.h"
|
||||
#include "effects/juce_GlowEffect.h"
|
||||
#include "detail/juce_Unicode.h"
|
||||
|
||||
|
|
|
|||
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