2  * Copyright 2015 Google Inc.
5  * found in the LICENSE file.
8 // This test only works with the GPU backend.
10 #include "gm.h"
14 #include "GrContext.h"
15 #include "GrGpu.h"
16 #include "GrTest.h"
17 #include "SkBitmap.h"
18 #include "SkGradientShader.h"
19 #include "SkImage.h"
38         // We create an RGB bitmap and then extract YUV bmps where the U and V bitmaps are  in onOnceBeforeDraw()
39         // subsampled by 2 in both dimensions.  in onOnceBeforeDraw()
43         paint.setShader(SkGradientShader::MakeRadial(SkPoint::Make(0,0), kBmpSize / 2.f, kColors,  in onOnceBeforeDraw()
47         rgbBmp.allocN32Pixels(kBmpSize, kBmpSize, true);  in onOnceBeforeDraw()
49         canvas.drawPaint(paint);  in onOnceBeforeDraw()
50         SkPMColor* rgbColors = static_cast<SkPMColor*>(rgbBmp.getPixels());  in onOnceBeforeDraw()
53         fYUVBmps[0].allocPixels(yinfo);  in onOnceBeforeDraw()
55         fYUVBmps[1].allocPixels(uinfo);  in onOnceBeforeDraw()
57         fYUVBmps[2].allocPixels(vinfo);  in onOnceBeforeDraw()
60         yPixels = static_cast<unsigned char*>(fYUVBmps[0].getPixels());  in onOnceBeforeDraw()
61         uvPixels[0] = static_cast<signed char*>(fYUVBmps[1].getPixels());  in onOnceBeforeDraw()
62         uvPixels[1] = static_cast<signed char*>(fYUVBmps[2].getPixels());  in onOnceBeforeDraw()
65         // yuv color spaces when converted back to RGB)  in onOnceBeforeDraw()
73                 // Average together 4 pixels of RGB.  in onOnceBeforeDraw()
74                 int rgb[] = { 0, 0, 0 };  in onOnceBeforeDraw()  local
78                         rgb[0] += SkGetPackedR32(rgbColors[rgbIndex]);  in onOnceBeforeDraw()
79                         rgb[1] += SkGetPackedG32(rgbColors[rgbIndex]);  in onOnceBeforeDraw()
80                         rgb[2] += SkGetPackedB32(rgbColors[rgbIndex]);  in onOnceBeforeDraw()
84                     rgb[c] /= 4;  in onOnceBeforeDraw()
88                     ((-38 * rgb[0] -  74 * rgb[1] + 112 * rgb[2] + 128) >> 8) + 128);  in onOnceBeforeDraw()
90                     ((112 * rgb[0] -  94 * rgb[1] -  18 * rgb[2] + 128) >> 8) + 128);  in onOnceBeforeDraw()
93         fRGBImage = SkImage::MakeRasterCopy(SkPixmap(rgbBmp.info(), rgbColors, rgbBmp.rowBytes()));  in onOnceBeforeDraw()
103             SkASSERT(fYUVBmps[i].width() == SkToInt(fYUVBmps[i].rowBytes()));  in createYUVTextures()
104             yuvHandles[i] = gpu->createTestingOnlyBackendTexture(fYUVBmps[i].getPixels(),  in createYUVTextures()
105                                                                  fYUVBmps[i].width(),  in createYUVTextures()
106                                                                  fYUVBmps[i].height(),  in createYUVTextures()
134         constexpr SkScalar kPad = 10.f;  in onDraw()
137             { fYUVBmps[0].width(), fYUVBmps[0].height()},  in onDraw()
138             { fYUVBmps[1].width(), fYUVBmps[1].height()},  in onDraw()
139             { fYUVBmps[2].width(), fYUVBmps[2].height()},  in onDraw()
142         images.push_back(fRGBImage);  in onDraw()
146             images.push_back(SkImage::MakeFromYUVTexturesCopy(context,  in onDraw()
152         for (int i = 0; i < images.count(); ++ i) {  in onDraw()
153             SkScalar y = (i + 1) * kPad + i * fYUVBmps[0].height();  in onDraw()
156             canvas->drawImage(images[i].get(), x, y);  in onDraw()