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 "GrContext.h" 15 #include "GrGpu.h" 16 #include "GrTest.h" 17 #include "gl/GrGLContext.h" 18 #include "SkBitmap.h" 19 #include "SkGradientShader.h" 20 #include "SkImage.h" 21 22 namespace skiagm { 23 class RectangleTexture : public GM { 24 public: 25 RectangleTexture() { 26 this->setBGColor(0xFFFFFFFF); 27 } 28 29 protected: 30 SkString onShortName() override { 31 return SkString("rectangle_texture"); 32 } 33 34 SkISize onISize() override { 35 return SkISize::Make(1035, 240); 36 } 37 38 void fillPixels(int width, int height, void *pixels) { 39 SkBitmap bmp; 40 bmp.setInfo(SkImageInfo::MakeN32(width, height, kOpaque_SkAlphaType), width * 4); 41 bmp.setPixels(pixels); 42 SkPaint paint; 43 SkCanvas canvas(bmp); 44 SkPoint pts[] = { {0, 0}, {0, SkIntToScalar(height)} }; 45 SkColor colors0[] = { 0xFF1060B0 , 0xFF102030 }; 46 paint.setShader(SkGradientShader::MakeLinear(pts, colors0, nullptr, 2, 47 SkShader::kClamp_TileMode)); 48 canvas.drawPaint(paint); 49 50 SkColor colors1[] = { 0xFFA07010 , 0xFFA02080 }; 51 paint.setAntiAlias(true); 52 paint.setShader(SkGradientShader::MakeLinear(pts, colors1, nullptr, 2, 53 SkShader::kClamp_TileMode)); 54 canvas.drawCircle(SkIntToScalar(width) / 2, SkIntToScalar(height) / 2, 55 SkIntToScalar(width + height) / 5, paint); 56 } 57 58 sk_sp<SkImage> createRectangleTextureImg(GrContext* context, int width, int height, 59 void* pixels) { 60 if (!context) { 61 return nullptr; 62 } 63 GrGpu* gpu = context->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 return nullptr; 75 } 76 77 // We will always create the GL texture as GL_RGBA, however the pixels uploaded may be 78 // be RGBA or BGRA, depending on how SkPMColor was compiled. 79 GrGLenum format; 80 if (kSkia8888_GrPixelConfig == kBGRA_8888_GrPixelConfig) { 81 format = GR_GL_BGRA; 82 } else { 83 SkASSERT(kSkia8888_GrPixelConfig == kRGBA_8888_GrPixelConfig); 84 format = GR_GL_RGBA; 85 } 86 87 const GrGLInterface* gl = glCtx->interface(); 88 // Useful for debugging whether errors result from use of RECTANGLE 89 // #define TARGET GR_GL_TEXTURE_2D 90 #define TARGET GR_GL_TEXTURE_RECTANGLE 91 GrGLuint id = 0; 92 GR_GL_CALL(gl, GenTextures(1, &id)); 93 GR_GL_CALL(gl, BindTexture(TARGET, id)); 94 GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_MAG_FILTER, 95 GR_GL_NEAREST)); 96 GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_MIN_FILTER, 97 GR_GL_NEAREST)); 98 GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_WRAP_S, 99 GR_GL_CLAMP_TO_EDGE)); 100 GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_WRAP_T, 101 GR_GL_CLAMP_TO_EDGE)); 102 GR_GL_CALL(gl, TexImage2D(TARGET, 0, GR_GL_RGBA, width, height, 0, 103 format, GR_GL_UNSIGNED_BYTE, pixels)); 104 105 106 context->resetContext(); 107 GrGLTextureInfo info; 108 info.fID = id; 109 info.fTarget = TARGET; 110 GrBackendTextureDesc desc; 111 desc.fConfig = kRGBA_8888_GrPixelConfig; 112 desc.fWidth = width; 113 desc.fHeight = height; 114 desc.fOrigin = kTopLeft_GrSurfaceOrigin; 115 desc.fTextureHandle = reinterpret_cast<GrBackendObject>(&info); 116 if (sk_sp<SkImage> image = SkImage::MakeFromAdoptedTexture(context, desc)) { 117 return image; 118 } 119 GR_GL_CALL(gl, DeleteTextures(1, &id)); 120 return nullptr; 121 } 122 123 void onDraw(SkCanvas* canvas) override { 124 GrContext *context = canvas->getGrContext(); 125 if (!context) { 126 skiagm::GM::DrawGpuOnlyMessage(canvas); 127 return; 128 } 129 130 constexpr int kWidth = 50; 131 constexpr int kHeight = 50; 132 constexpr SkScalar kPad = 5.f; 133 134 SkPMColor pixels[kWidth * kHeight]; 135 this->fillPixels(kWidth, kHeight, pixels); 136 sk_sp<SkImage> rectImg(this->createRectangleTextureImg(context, kWidth, kHeight, pixels)); 137 138 if (!rectImg) { 139 SkPaint paint; 140 paint.setAntiAlias(true); 141 const char* kMsg = "Could not create rectangle texture image."; 142 canvas->drawText(kMsg, strlen(kMsg), 10, 100, paint); 143 return; 144 } 145 146 constexpr SkFilterQuality kQualities[] = { 147 kNone_SkFilterQuality, 148 kLow_SkFilterQuality, 149 kMedium_SkFilterQuality, 150 kHigh_SkFilterQuality, 151 }; 152 153 constexpr SkScalar kScales[] = { 1.0f, 1.2f, 0.75f }; 154 155 canvas->translate(kPad, kPad); 156 for (auto s : kScales) { 157 canvas->save(); 158 canvas->scale(s, s); 159 for (auto q : kQualities) { 160 SkPaint plainPaint; 161 plainPaint.setFilterQuality(q); 162 canvas->drawImage(rectImg.get(), 0, 0, &plainPaint); 163 canvas->translate(kWidth + kPad, 0); 164 165 SkPaint clampPaint; 166 clampPaint.setFilterQuality(q); 167 clampPaint.setShader(rectImg->makeShader(SkShader::kClamp_TileMode, 168 SkShader::kClamp_TileMode)); 169 canvas->drawRect(SkRect::MakeWH(1.5f * kWidth, 1.5f * kHeight), clampPaint); 170 canvas->translate(kWidth * 1.5f + kPad, 0); 171 172 SkPaint repeatPaint; 173 repeatPaint.setFilterQuality(q); 174 repeatPaint.setShader(rectImg->makeShader(SkShader::kRepeat_TileMode, 175 SkShader::kMirror_TileMode)); 176 canvas->drawRect(SkRect::MakeWH(1.5f * kWidth, 1.5f * kHeight), repeatPaint); 177 canvas->translate(1.5f * kWidth + kPad, 0); 178 } 179 canvas->restore(); 180 canvas->translate(0, kPad + 1.5f * kHeight * s); 181 } 182 } 183 184 private: 185 typedef GM INHERITED; 186 }; 187 188 DEF_GM(return new RectangleTexture;) 189 } 190 191 #endif 192
