1 /* 2 * Copyright 2016 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 // This test only works with the GPU backend. 9 10 #include "gm.h" 11 12 #include "GrBackendSurface.h" 13 #include "GrContext.h" 14 #include "GrContextPriv.h" 15 #include "GrGpu.h" 16 #include "gl/GrGLContext.h" 17 #include "SkBitmap.h" 18 #include "SkGradientShader.h" 19 #include "SkImage.h" 20 21 namespace skiagm { 22 class RectangleTexture : public GM { 23 public: RectangleTexture()24 RectangleTexture() { 25 this->setBGColor(0xFFFFFFFF); 26 } 27 28 protected: onShortName()29 SkString onShortName() override { 30 return SkString("rectangle_texture"); 31 } 32 onISize()33 SkISize onISize() override { return SkISize::Make(1200, 500); } 34 fillPixels(int width,int height,void * pixels)35 void fillPixels(int width, int height, void *pixels) { 36 SkBitmap bmp; 37 bmp.setInfo(SkImageInfo::MakeN32(width, height, kOpaque_SkAlphaType), width * 4); 38 bmp.setPixels(pixels); 39 SkPaint paint; 40 SkCanvas canvas(bmp); 41 SkPoint pts[] = { {0, 0}, {0, SkIntToScalar(height)} }; 42 SkColor colors0[] = { 0xFF1060B0 , 0xFF102030 }; 43 paint.setShader(SkGradientShader::MakeLinear(pts, colors0, nullptr, 2, 44 SkShader::kClamp_TileMode)); 45 canvas.drawPaint(paint); 46 47 SkColor colors1[] = {0xFFA07010, 0xFFA02080}; 48 paint.setAntiAlias(true); 49 paint.setShader(SkGradientShader::MakeLinear(pts, colors1, nullptr, 2, 50 SkShader::kClamp_TileMode)); 51 canvas.drawCircle(SkIntToScalar(width) / 2, SkIntToScalar(height) / 2, 52 SkIntToScalar(width + height) / 5, paint); 53 } 54 createRectangleTextureImg(GrContext * context,GrSurfaceOrigin origin,int width,int height,const uint32_t * pixels)55 sk_sp<SkImage> createRectangleTextureImg(GrContext* context, GrSurfaceOrigin origin, int width, 56 int height, const uint32_t* pixels) { 57 if (!context) { 58 return nullptr; 59 } 60 if (context->abandoned()) { 61 return nullptr; 62 } 63 GrGpu* gpu = context->contextPriv().getGpu(); 64 if (!gpu) { 65 return nullptr; 66 } 67 const GrGLContext* glCtx = gpu->glContextForTesting(); 68 if (!glCtx) { 69 return nullptr; 70 } 71 72 if (!(kGL_GrGLStandard == glCtx->standard() && glCtx->version() >= GR_GL_VER(3, 1)) && 73 !(glCtx->hasExtension("GL_ARB_texture_rectangle") || 74 glCtx->hasExtension("GL_ANGLE_texture_rectangle"))) { 75 return nullptr; 76 } 77 78 // We will always create the GL texture as GL_RGBA, however the pixels uploaded may be 79 // be RGBA or BGRA, depending on how SkPMColor was compiled. 80 GrGLenum format; 81 if (kSkia8888_GrPixelConfig == kBGRA_8888_GrPixelConfig) { 82 format = GR_GL_BGRA; 83 } else { 84 SkASSERT(kSkia8888_GrPixelConfig == kRGBA_8888_GrPixelConfig); 85 format = GR_GL_RGBA; 86 } 87 88 const GrGLInterface* gl = glCtx->interface(); 89 // Useful for debugging whether errors result from use of RECTANGLE 90 // static constexpr GrGLenum kTarget = GR_GL_TEXTURE_2D; 91 static constexpr GrGLenum kTarget = GR_GL_TEXTURE_RECTANGLE; 92 GrGLuint id = 0; 93 GR_GL_CALL(gl, GenTextures(1, &id)); 94 GR_GL_CALL(gl, BindTexture(kTarget, id)); 95 GR_GL_CALL(gl, TexParameteri(kTarget, GR_GL_TEXTURE_MAG_FILTER, GR_GL_NEAREST)); 96 GR_GL_CALL(gl, TexParameteri(kTarget, GR_GL_TEXTURE_MIN_FILTER, GR_GL_NEAREST)); 97 GR_GL_CALL(gl, TexParameteri(kTarget, GR_GL_TEXTURE_WRAP_S, GR_GL_CLAMP_TO_EDGE)); 98 GR_GL_CALL(gl, TexParameteri(kTarget, GR_GL_TEXTURE_WRAP_T, GR_GL_CLAMP_TO_EDGE)); 99 std::unique_ptr<uint32_t[]> tempPixels; 100 if (origin == kBottomLeft_GrSurfaceOrigin) { 101 tempPixels.reset(new uint32_t[width * height]); 102 for (int y = 0; y < height; ++y) { 103 std::copy_n(pixels + width * (height - y - 1), width, tempPixels.get() + width * y); 104 } 105 pixels = tempPixels.get(); 106 } 107 GR_GL_CALL(gl, TexImage2D(kTarget, 0, GR_GL_RGBA, width, height, 0, format, 108 GR_GL_UNSIGNED_BYTE, pixels)); 109 110 context->resetContext(); 111 GrGLTextureInfo info; 112 info.fID = id; 113 info.fTarget = kTarget; 114 info.fFormat = GR_GL_RGBA8; 115 116 GrBackendTexture rectangleTex(width, height, GrMipMapped::kNo, info); 117 118 if (sk_sp<SkImage> image = SkImage::MakeFromAdoptedTexture(context, rectangleTex, origin, 119 kRGBA_8888_SkColorType)) { 120 return image; 121 } 122 GR_GL_CALL(gl, DeleteTextures(1, &id)); 123 return nullptr; 124 } 125 onDraw(SkCanvas * canvas)126 void onDraw(SkCanvas* canvas) override { 127 GrContext *context = canvas->getGrContext(); 128 if (!context) { 129 skiagm::GM::DrawGpuOnlyMessage(canvas); 130 return; 131 } 132 133 constexpr int kWidth = 50; 134 constexpr int kHeight = 50; 135 constexpr SkScalar kPad = 5.f; 136 137 SkPMColor pixels[kWidth * kHeight]; 138 this->fillPixels(kWidth, kHeight, pixels); 139 140 sk_sp<SkImage> rectImgs[] = { 141 this->createRectangleTextureImg(context, kTopLeft_GrSurfaceOrigin, kWidth, kHeight, 142 pixels), 143 this->createRectangleTextureImg(context, kBottomLeft_GrSurfaceOrigin, kWidth, 144 kHeight, pixels), 145 }; 146 SkASSERT(SkToBool(rectImgs[0]) == SkToBool(rectImgs[1])); 147 if (!rectImgs[0]) { 148 SkPaint paint; 149 SkFont font; 150 canvas->drawString("Could not create rectangle texture image.", 10, 100, font, paint); 151 return; 152 } 153 154 constexpr SkFilterQuality kQualities[] = { 155 kNone_SkFilterQuality, 156 kLow_SkFilterQuality, 157 kMedium_SkFilterQuality, 158 kHigh_SkFilterQuality, 159 }; 160 161 constexpr SkScalar kScales[] = {1.0f, 1.2f, 0.75f}; 162 163 canvas->translate(kPad, kPad); 164 for (size_t i = 0; i < SK_ARRAY_COUNT(rectImgs); ++i) { 165 for (auto s : kScales) { 166 canvas->save(); 167 canvas->scale(s, s); 168 for (auto q : kQualities) { 169 // drawImage 170 SkPaint plainPaint; 171 plainPaint.setFilterQuality(q); 172 canvas->drawImage(rectImgs[i], 0, 0, &plainPaint); 173 canvas->translate(kWidth + kPad, 0); 174 175 // clamp/clamp shader 176 SkPaint clampPaint; 177 clampPaint.setFilterQuality(q); 178 clampPaint.setShader(rectImgs[i]->makeShader()); 179 canvas->drawRect(SkRect::MakeWH(1.5f * kWidth, 1.5f * kHeight), clampPaint); 180 canvas->translate(kWidth * 1.5f + kPad, 0); 181 182 // repeat/mirror shader 183 SkPaint repeatPaint; 184 repeatPaint.setFilterQuality(q); 185 repeatPaint.setShader(rectImgs[i]->makeShader(SkShader::kRepeat_TileMode, 186 SkShader::kMirror_TileMode)); 187 canvas->drawRect(SkRect::MakeWH(1.5f * kWidth, 1.5f * kHeight), repeatPaint); 188 canvas->translate(1.5f * kWidth + kPad, 0); 189 190 // drawImageRect with kStrict 191 auto srcRect = SkRect::MakeXYWH(.25f * rectImgs[i]->width(), 192 .25f * rectImgs[i]->height(), 193 .50f * rectImgs[i]->width(), 194 .50f * rectImgs[i]->height()); 195 auto dstRect = SkRect::MakeXYWH(0, 0, 196 .50f * rectImgs[i]->width(), 197 .50f * rectImgs[i]->height()); 198 canvas->drawImageRect(rectImgs[i], srcRect, dstRect, &plainPaint, 199 SkCanvas::kStrict_SrcRectConstraint); 200 canvas->translate(kWidth * .5f + kPad, 0); 201 } 202 canvas->restore(); 203 canvas->translate(0, kPad + 1.5f * kHeight * s); 204 } 205 } 206 } 207 208 private: 209 typedef GM INHERITED; 210 }; 211 212 DEF_GM(return new RectangleTexture;) 213 } 214