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 #if SK_SUPPORT_GPU 13 14 #include "GrBackendSurface.h" 15 #include "GrContext.h" 16 #include "GrGpu.h" 17 #include "GrTest.h" 18 #include "gl/GrGLContext.h" 19 #include "SkBitmap.h" 20 #include "SkGradientShader.h" 21 #include "SkImage.h" 22 23 namespace skiagm { 24 class RectangleTexture : public GM { 25 public: 26 RectangleTexture() { 27 this->setBGColor(0xFFFFFFFF); 28 } 29 30 protected: 31 SkString onShortName() override { 32 return SkString("rectangle_texture"); 33 } 34 35 SkISize onISize() override { 36 return SkISize::Make(1035, 240); 37 } 38 39 void fillPixels(int width, int height, void *pixels) { 40 SkBitmap bmp; 41 bmp.setInfo(SkImageInfo::MakeN32(width, height, kOpaque_SkAlphaType), width * 4); 42 bmp.setPixels(pixels); 43 SkPaint paint; 44 SkCanvas canvas(bmp); 45 SkPoint pts[] = { {0, 0}, {0, SkIntToScalar(height)} }; 46 SkColor colors0[] = { 0xFF1060B0 , 0xFF102030 }; 47 paint.setShader(SkGradientShader::MakeLinear(pts, colors0, nullptr, 2, 48 SkShader::kClamp_TileMode)); 49 canvas.drawPaint(paint); 50 51 SkColor colors1[] = { 0xFFA07010 , 0xFFA02080 }; 52 paint.setAntiAlias(true); 53 paint.setShader(SkGradientShader::MakeLinear(pts, colors1, nullptr, 2, 54 SkShader::kClamp_TileMode)); 55 canvas.drawCircle(SkIntToScalar(width) / 2, SkIntToScalar(height) / 2, 56 SkIntToScalar(width + height) / 5, paint); 57 } 58 59 sk_sp<SkImage> createRectangleTextureImg(GrContext* context, int width, int height, 60 void* pixels) { 61 if (!context) { 62 return nullptr; 63 } 64 GrGpu* gpu = context->getGpu(); 65 if (!gpu) { 66 return nullptr; 67 } 68 const GrGLContext* glCtx = gpu->glContextForTesting(); 69 if (!glCtx) { 70 return nullptr; 71 } 72 73 if (!(kGL_GrGLStandard == glCtx->standard() && glCtx->version() >= GR_GL_VER(3, 1)) && 74 !glCtx->hasExtension("GL_ARB_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 // #define TARGET GR_GL_TEXTURE_2D 91 #define TARGET GR_GL_TEXTURE_RECTANGLE 92 GrGLuint id = 0; 93 GR_GL_CALL(gl, GenTextures(1, &id)); 94 GR_GL_CALL(gl, BindTexture(TARGET, id)); 95 GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_MAG_FILTER, 96 GR_GL_NEAREST)); 97 GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_MIN_FILTER, 98 GR_GL_NEAREST)); 99 GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_WRAP_S, 100 GR_GL_CLAMP_TO_EDGE)); 101 GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_WRAP_T, 102 GR_GL_CLAMP_TO_EDGE)); 103 GR_GL_CALL(gl, TexImage2D(TARGET, 0, GR_GL_RGBA, width, height, 0, 104 format, GR_GL_UNSIGNED_BYTE, pixels)); 105 106 107 context->resetContext(); 108 GrGLTextureInfo info; 109 info.fID = id; 110 info.fTarget = TARGET; 111 112 GrBackendTexture rectangleTex(width, height, kRGBA_8888_GrPixelConfig, info); 113 114 if (sk_sp<SkImage> image = SkImage::MakeFromAdoptedTexture(context, rectangleTex, 115 kTopLeft_GrSurfaceOrigin)) { 116 return image; 117 } 118 GR_GL_CALL(gl, DeleteTextures(1, &id)); 119 return nullptr; 120 } 121 122 void onDraw(SkCanvas* canvas) override { 123 GrContext *context = canvas->getGrContext(); 124 if (!context) { 125 skiagm::GM::DrawGpuOnlyMessage(canvas); 126 return; 127 } 128 129 constexpr int kWidth = 50; 130 constexpr int kHeight = 50; 131 constexpr SkScalar kPad = 5.f; 132 133 SkPMColor pixels[kWidth * kHeight]; 134 this->fillPixels(kWidth, kHeight, pixels); 135 sk_sp<SkImage> rectImg(this->createRectangleTextureImg(context, kWidth, kHeight, pixels)); 136 137 if (!rectImg) { 138 SkPaint paint; 139 paint.setAntiAlias(true); 140 const char* kMsg = "Could not create rectangle texture image."; 141 canvas->drawString(kMsg, 10, 100, paint); 142 return; 143 } 144 145 constexpr SkFilterQuality kQualities[] = { 146 kNone_SkFilterQuality, 147 kLow_SkFilterQuality, 148 kMedium_SkFilterQuality, 149 kHigh_SkFilterQuality, 150 }; 151 152 constexpr SkScalar kScales[] = { 1.0f, 1.2f, 0.75f }; 153 154 canvas->translate(kPad, kPad); 155 for (auto s : kScales) { 156 canvas->save(); 157 canvas->scale(s, s); 158 for (auto q : kQualities) { 159 SkPaint plainPaint; 160 plainPaint.setFilterQuality(q); 161 canvas->drawImage(rectImg.get(), 0, 0, &plainPaint); 162 canvas->translate(kWidth + kPad, 0); 163 164 SkPaint clampPaint; 165 clampPaint.setFilterQuality(q); 166 clampPaint.setShader(rectImg->makeShader()); 167 canvas->drawRect(SkRect::MakeWH(1.5f * kWidth, 1.5f * kHeight), clampPaint); 168 canvas->translate(kWidth * 1.5f + kPad, 0); 169 170 SkPaint repeatPaint; 171 repeatPaint.setFilterQuality(q); 172 repeatPaint.setShader(rectImg->makeShader(SkShader::kRepeat_TileMode, 173 SkShader::kMirror_TileMode)); 174 canvas->drawRect(SkRect::MakeWH(1.5f * kWidth, 1.5f * kHeight), repeatPaint); 175 canvas->translate(1.5f * kWidth + kPad, 0); 176 } 177 canvas->restore(); 178 canvas->translate(0, kPad + 1.5f * kHeight * s); 179 } 180 } 181 182 private: 183 typedef GM INHERITED; 184 }; 185 186 DEF_GM(return new RectangleTexture;) 187 } 188 189 #endif 190
