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 GpuGM { 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 GrGpu* gpu = context->priv().getGpu(); 58 if (!gpu) { 59 return nullptr; 60 } 61 const GrGLContext* glCtx = gpu->glContextForTesting(); 62 if (!glCtx) { 63 return nullptr; 64 } 65 66 if (!(kGL_GrGLStandard == glCtx->standard() && glCtx->version() >= GR_GL_VER(3, 1)) && 67 !(glCtx->hasExtension("GL_ARB_texture_rectangle") || 68 glCtx->hasExtension("GL_ANGLE_texture_rectangle"))) { 69 return nullptr; 70 } 71 72 // We will always create the GL texture as GL_RGBA, however the pixels uploaded may be 73 // be RGBA or BGRA, depending on how SkPMColor was compiled. 74 GrGLenum format; 75 if (kSkia8888_GrPixelConfig == kBGRA_8888_GrPixelConfig) { 76 format = GR_GL_BGRA; 77 } else { 78 SkASSERT(kSkia8888_GrPixelConfig == kRGBA_8888_GrPixelConfig); 79 format = GR_GL_RGBA; 80 } 81 82 const GrGLInterface* gl = glCtx->interface(); 83 // Useful for debugging whether errors result from use of RECTANGLE 84 // static constexpr GrGLenum kTarget = GR_GL_TEXTURE_2D; 85 static constexpr GrGLenum kTarget = GR_GL_TEXTURE_RECTANGLE; 86 GrGLuint id = 0; 87 GR_GL_CALL(gl, GenTextures(1, &id)); 88 GR_GL_CALL(gl, BindTexture(kTarget, id)); 89 GR_GL_CALL(gl, TexParameteri(kTarget, GR_GL_TEXTURE_MAG_FILTER, GR_GL_NEAREST)); 90 GR_GL_CALL(gl, TexParameteri(kTarget, GR_GL_TEXTURE_MIN_FILTER, GR_GL_NEAREST)); 91 GR_GL_CALL(gl, TexParameteri(kTarget, GR_GL_TEXTURE_WRAP_S, GR_GL_CLAMP_TO_EDGE)); 92 GR_GL_CALL(gl, TexParameteri(kTarget, GR_GL_TEXTURE_WRAP_T, GR_GL_CLAMP_TO_EDGE)); 93 std::unique_ptr<uint32_t[]> tempPixels; 94 if (origin == kBottomLeft_GrSurfaceOrigin) { 95 tempPixels.reset(new uint32_t[width * height]); 96 for (int y = 0; y < height; ++y) { 97 std::copy_n(pixels + width * (height - y - 1), width, tempPixels.get() + width * y); 98 } 99 pixels = tempPixels.get(); 100 } 101 GR_GL_CALL(gl, TexImage2D(kTarget, 0, GR_GL_RGBA, width, height, 0, format, 102 GR_GL_UNSIGNED_BYTE, pixels)); 103 104 context->resetContext(); 105 GrGLTextureInfo info; 106 info.fID = id; 107 info.fTarget = kTarget; 108 info.fFormat = GR_GL_RGBA8; 109 110 GrBackendTexture rectangleTex(width, height, GrMipMapped::kNo, info); 111 112 if (sk_sp<SkImage> image = SkImage::MakeFromAdoptedTexture(context, rectangleTex, origin, 113 kRGBA_8888_SkColorType)) { 114 return image; 115 } 116 GR_GL_CALL(gl, DeleteTextures(1, &id)); 117 return nullptr; 118 } 119 onDraw(GrContext * context,GrRenderTargetContext *,SkCanvas * canvas,SkString * errorMsg)120 DrawResult onDraw(GrContext* context, GrRenderTargetContext*, SkCanvas* canvas, 121 SkString* errorMsg) override { 122 constexpr int kWidth = 50; 123 constexpr int kHeight = 50; 124 constexpr SkScalar kPad = 5.f; 125 126 SkPMColor pixels[kWidth * kHeight]; 127 this->fillPixels(kWidth, kHeight, pixels); 128 129 sk_sp<SkImage> rectImgs[] = { 130 this->createRectangleTextureImg(context, kTopLeft_GrSurfaceOrigin, kWidth, kHeight, 131 pixels), 132 this->createRectangleTextureImg(context, kBottomLeft_GrSurfaceOrigin, kWidth, 133 kHeight, pixels), 134 }; 135 SkASSERT(SkToBool(rectImgs[0]) == SkToBool(rectImgs[1])); 136 if (!rectImgs[0]) { 137 *errorMsg = "Could not create rectangle texture image."; 138 return DrawResult::kFail; 139 } 140 141 constexpr SkFilterQuality kQualities[] = { 142 kNone_SkFilterQuality, 143 kLow_SkFilterQuality, 144 kMedium_SkFilterQuality, 145 kHigh_SkFilterQuality, 146 }; 147 148 constexpr SkScalar kScales[] = {1.0f, 1.2f, 0.75f}; 149 150 canvas->translate(kPad, kPad); 151 for (size_t i = 0; i < SK_ARRAY_COUNT(rectImgs); ++i) { 152 for (auto s : kScales) { 153 canvas->save(); 154 canvas->scale(s, s); 155 for (auto q : kQualities) { 156 // drawImage 157 SkPaint plainPaint; 158 plainPaint.setFilterQuality(q); 159 canvas->drawImage(rectImgs[i], 0, 0, &plainPaint); 160 canvas->translate(kWidth + kPad, 0); 161 162 // clamp/clamp shader 163 SkPaint clampPaint; 164 clampPaint.setFilterQuality(q); 165 clampPaint.setShader(rectImgs[i]->makeShader()); 166 canvas->drawRect(SkRect::MakeWH(1.5f * kWidth, 1.5f * kHeight), clampPaint); 167 canvas->translate(kWidth * 1.5f + kPad, 0); 168 169 // repeat/mirror shader 170 SkPaint repeatPaint; 171 repeatPaint.setFilterQuality(q); 172 repeatPaint.setShader(rectImgs[i]->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 // drawImageRect with kStrict 178 auto srcRect = SkRect::MakeXYWH(.25f * rectImgs[i]->width(), 179 .25f * rectImgs[i]->height(), 180 .50f * rectImgs[i]->width(), 181 .50f * rectImgs[i]->height()); 182 auto dstRect = SkRect::MakeXYWH(0, 0, 183 .50f * rectImgs[i]->width(), 184 .50f * rectImgs[i]->height()); 185 canvas->drawImageRect(rectImgs[i], srcRect, dstRect, &plainPaint, 186 SkCanvas::kStrict_SrcRectConstraint); 187 canvas->translate(kWidth * .5f + kPad, 0); 188 } 189 canvas->restore(); 190 canvas->translate(0, kPad + 1.5f * kHeight * s); 191 } 192 } 193 return DrawResult::kOk; 194 } 195 196 private: 197 typedef GM INHERITED; 198 }; 199 200 DEF_GM(return new RectangleTexture;) 201 } 202