37 lines
1.1 KiB
C++
37 lines
1.1 KiB
C++
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#include "CanvasPixelShader.h"
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#include "Color.h"
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#include "SoftwareCanvasRenderer.h"
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#include "CanvasPortion.h"
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#include "CanvasPixel.h"
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#include "CanvasFragment.h"
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#include "Rasterizer.h"
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CanvasPixelShader::CanvasPixelShader(const SoftwareCanvasRenderer &renderer, CanvasPortion *portion, int chunk_size, int chunks_x, int chunks_y):
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renderer(renderer), portion(portion), chunk_size(chunk_size), chunks_x(chunks_x), chunks_y(chunks_y)
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{
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}
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int CanvasPixelShader::processParallelUnit(int unit)
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{
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// Locate the chunk we work on
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int chunk_x = unit % chunks_x;
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int chunk_y = unit / chunks_x;
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// Resolve the pixel color
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int x = chunk_x * chunk_size;
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int y = chunk_y * chunk_size;
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const CanvasPixel &pixel = portion->at(x, y);
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int n = pixel.getFragmentCount();
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Color composite = COLOR_BLACK;
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for (int i = 0; i < n; i++)
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{
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const CanvasFragment &fragment = pixel.getFragment(i);
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const Rasterizer &rasterizer = renderer.getRasterizer(fragment.getClient());
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composite.mask(rasterizer.shadeFragment(fragment));
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}
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portion->setColor(x, y, composite);
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return 0;
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}
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