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/gm.h" 11 #include "include/core/SkBitmap.h" 12 #include "include/core/SkCanvas.h" 13 #include "include/core/SkColor.h" 14 #include "include/core/SkFilterQuality.h" 15 #include "include/core/SkImage.h" 16 #include "include/core/SkImageInfo.h" 17 #include "include/core/SkPaint.h" 18 #include "include/core/SkPoint.h" 19 #include "include/core/SkRect.h" 20 #include "include/core/SkRefCnt.h" 21 #include "include/core/SkScalar.h" 22 #include "include/core/SkShader.h" 23 #include "include/core/SkSize.h" 24 #include "include/core/SkString.h" 25 #include "include/core/SkTileMode.h" 26 #include "include/core/SkTypes.h" 27 #include "include/effects/SkGradientShader.h" 28 #include "include/gpu/GrBackendSurface.h" 29 #include "include/gpu/GrContext.h" 30 #include "include/gpu/GrTypes.h" 31 #include "include/gpu/gl/GrGLFunctions.h" 32 #include "include/gpu/gl/GrGLInterface.h" 33 #include "include/gpu/gl/GrGLTypes.h" 34 #include "include/private/GrTypesPriv.h" 35 #include "src/gpu/GrContextPriv.h" 36 #include "src/gpu/GrGpu.h" 37 #include "src/gpu/gl/GrGLContext.h" 38 #include "src/gpu/gl/GrGLDefines.h" 39 #include "src/gpu/gl/GrGLUtil.h" 40 41 #include <algorithm> 42 #include <cstdint> 43 #include <memory> 44 45 class GrRenderTargetContext; 46 47 namespace skiagm { 48 class RectangleTexture : public GpuGM { 49 public: RectangleTexture()50 RectangleTexture() { 51 this->setBGColor(0xFFFFFFFF); 52 } 53 54 protected: onShortName()55 SkString onShortName() override { 56 return SkString("rectangle_texture"); 57 } 58 onISize()59 SkISize onISize() override { return SkISize::Make(1200, 500); } 60 fillPixels(int width,int height,void * pixels)61 void fillPixels(int width, int height, void *pixels) { 62 SkBitmap bmp; 63 bmp.setInfo(SkImageInfo::Make(width, height, kRGBA_8888_SkColorType, kOpaque_SkAlphaType)); 64 bmp.setPixels(pixels); 65 SkPaint paint; 66 SkCanvas canvas(bmp); 67 SkPoint pts[] = { {0, 0}, {0, SkIntToScalar(height)} }; 68 SkColor colors0[] = { 0xFF1060B0 , 0xFF102030 }; 69 paint.setShader(SkGradientShader::MakeLinear(pts, colors0, nullptr, 2, SkTileMode::kClamp)); 70 canvas.drawPaint(paint); 71 72 SkColor colors1[] = {0xFFA07010, 0xFFA02080}; 73 paint.setAntiAlias(true); 74 paint.setShader(SkGradientShader::MakeLinear(pts, colors1, nullptr, 2, SkTileMode::kClamp)); 75 canvas.drawCircle(SkIntToScalar(width) / 2, SkIntToScalar(height) / 2, 76 SkIntToScalar(width + height) / 5, paint); 77 } 78 GetGLContextIfSupported(GrContext * context)79 static const GrGLContext* GetGLContextIfSupported(GrContext* context) { 80 if (context->backend() != GrBackendApi::kOpenGL) { 81 return nullptr; 82 } 83 auto* caps = static_cast<const GrGLCaps*>(context->priv().caps()); 84 if (!caps->rectangleTextureSupport()) { 85 return nullptr; 86 } 87 return context->priv().getGpu()->glContextForTesting(); 88 } 89 createRectangleTextureImg(GrContext * context,GrSurfaceOrigin origin,int width,int height,const uint32_t * pixels)90 sk_sp<SkImage> createRectangleTextureImg(GrContext* context, GrSurfaceOrigin origin, int width, 91 int height, const uint32_t* pixels) { 92 const GrGLContext* glCtx = GetGLContextIfSupported(context); 93 if (!glCtx) { 94 return nullptr; 95 } 96 97 const GrGLInterface* gl = glCtx->interface(); 98 // Useful for debugging whether errors result from use of RECTANGLE 99 // static constexpr GrGLenum kTarget = GR_GL_TEXTURE_2D; 100 static constexpr GrGLenum kTarget = GR_GL_TEXTURE_RECTANGLE; 101 GrGLuint id = 0; 102 GR_GL_CALL(gl, GenTextures(1, &id)); 103 GR_GL_CALL(gl, BindTexture(kTarget, id)); 104 GR_GL_CALL(gl, TexParameteri(kTarget, GR_GL_TEXTURE_MAG_FILTER, GR_GL_NEAREST)); 105 GR_GL_CALL(gl, TexParameteri(kTarget, GR_GL_TEXTURE_MIN_FILTER, GR_GL_NEAREST)); 106 GR_GL_CALL(gl, TexParameteri(kTarget, GR_GL_TEXTURE_WRAP_S, GR_GL_CLAMP_TO_EDGE)); 107 GR_GL_CALL(gl, TexParameteri(kTarget, GR_GL_TEXTURE_WRAP_T, GR_GL_CLAMP_TO_EDGE)); 108 std::unique_ptr<uint32_t[]> tempPixels; 109 if (origin == kBottomLeft_GrSurfaceOrigin) { 110 tempPixels.reset(new uint32_t[width * height]); 111 for (int y = 0; y < height; ++y) { 112 std::copy_n(pixels + width * (height - y - 1), width, tempPixels.get() + width * y); 113 } 114 pixels = tempPixels.get(); 115 } 116 GR_GL_CALL(gl, TexImage2D(kTarget, 0, GR_GL_RGBA, width, height, 0, GR_GL_RGBA, 117 GR_GL_UNSIGNED_BYTE, pixels)); 118 119 context->resetContext(); 120 GrGLTextureInfo info; 121 info.fID = id; 122 info.fTarget = kTarget; 123 info.fFormat = GR_GL_RGBA8; 124 125 GrBackendTexture rectangleTex(width, height, GrMipMapped::kNo, info); 126 127 if (sk_sp<SkImage> image = SkImage::MakeFromAdoptedTexture(context, rectangleTex, origin, 128 kRGBA_8888_SkColorType)) { 129 return image; 130 } 131 GR_GL_CALL(gl, DeleteTextures(1, &id)); 132 return nullptr; 133 } 134 onDraw(GrContext * context,GrRenderTargetContext *,SkCanvas * canvas,SkString * errorMsg)135 DrawResult onDraw(GrContext* context, GrRenderTargetContext*, SkCanvas* canvas, 136 SkString* errorMsg) override { 137 if (!GetGLContextIfSupported(context)) { 138 *errorMsg = "this GM requires an OpenGL 3.1+ context"; 139 return DrawResult::kSkip; 140 } 141 142 constexpr int kWidth = 50; 143 constexpr int kHeight = 50; 144 constexpr SkScalar kPad = 5.f; 145 146 SkPMColor pixels[kWidth * kHeight]; 147 this->fillPixels(kWidth, kHeight, pixels); 148 149 sk_sp<SkImage> rectImgs[] = { 150 this->createRectangleTextureImg(context, kTopLeft_GrSurfaceOrigin, kWidth, kHeight, 151 pixels), 152 this->createRectangleTextureImg(context, kBottomLeft_GrSurfaceOrigin, kWidth, 153 kHeight, pixels), 154 }; 155 SkASSERT(SkToBool(rectImgs[0]) == SkToBool(rectImgs[1])); 156 if (!rectImgs[0]) { 157 *errorMsg = "Could not create rectangle texture image."; 158 return DrawResult::kFail; 159 } 160 161 constexpr SkFilterQuality kQualities[] = { 162 kNone_SkFilterQuality, 163 kLow_SkFilterQuality, 164 kMedium_SkFilterQuality, 165 kHigh_SkFilterQuality, 166 }; 167 168 constexpr SkScalar kScales[] = {1.0f, 1.2f, 0.75f}; 169 170 canvas->translate(kPad, kPad); 171 for (size_t i = 0; i < SK_ARRAY_COUNT(rectImgs); ++i) { 172 for (auto s : kScales) { 173 canvas->save(); 174 canvas->scale(s, s); 175 for (auto q : kQualities) { 176 // drawImage 177 SkPaint plainPaint; 178 plainPaint.setFilterQuality(q); 179 canvas->drawImage(rectImgs[i], 0, 0, &plainPaint); 180 canvas->translate(kWidth + kPad, 0); 181 182 // clamp/clamp shader 183 SkPaint clampPaint; 184 clampPaint.setFilterQuality(q); 185 clampPaint.setShader(rectImgs[i]->makeShader()); 186 canvas->drawRect(SkRect::MakeWH(1.5f * kWidth, 1.5f * kHeight), clampPaint); 187 canvas->translate(kWidth * 1.5f + kPad, 0); 188 189 // repeat/mirror shader 190 SkPaint repeatPaint; 191 repeatPaint.setFilterQuality(q); 192 repeatPaint.setShader(rectImgs[i]->makeShader(SkTileMode::kRepeat, 193 SkTileMode::kMirror)); 194 canvas->drawRect(SkRect::MakeWH(1.5f * kWidth, 1.5f * kHeight), repeatPaint); 195 canvas->translate(1.5f * kWidth + kPad, 0); 196 197 // drawImageRect with kStrict 198 auto srcRect = SkRect::MakeXYWH(.25f * rectImgs[i]->width(), 199 .25f * rectImgs[i]->height(), 200 .50f * rectImgs[i]->width(), 201 .50f * rectImgs[i]->height()); 202 auto dstRect = SkRect::MakeXYWH(0, 0, 203 .50f * rectImgs[i]->width(), 204 .50f * rectImgs[i]->height()); 205 canvas->drawImageRect(rectImgs[i], srcRect, dstRect, &plainPaint, 206 SkCanvas::kStrict_SrcRectConstraint); 207 canvas->translate(kWidth * .5f + kPad, 0); 208 } 209 canvas->restore(); 210 canvas->translate(0, kPad + 1.5f * kHeight * s); 211 } 212 } 213 return DrawResult::kOk; 214 } 215 216 private: 217 typedef GM INHERITED; 218 }; 219 220 DEF_GM(return new RectangleTexture;) 221 } 222