1 2 /* 3 * Copyright 2016 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 // This test only works with the GPU backend. 10 11 #include "gm.h" 12 13 #if SK_SUPPORT_GPU 14 15 #include "GrContext.h" 16 #include "GrTest.h" 17 #include "SkBitmap.h" 18 #include "SkGradientShader.h" 19 #include "SkImage.h" 20 21 namespace skiagm { 22 class RectangleTexture : public GM { 23 public: 24 RectangleTexture() { 25 this->setBGColor(0xFFFFFFFF); 26 } 27 28 protected: 29 SkString onShortName() override { 30 return SkString("rectangle_texture"); 31 } 32 33 SkISize onISize() override { 34 return SkISize::Make(1035, 240); 35 } 36 37 void fillPixels(int width, int height, void *pixels) { 38 SkBitmap bmp; 39 bmp.setInfo(SkImageInfo::MakeN32(width, height, kOpaque_SkAlphaType), width * 4); 40 bmp.setPixels(pixels); 41 SkPaint paint; 42 SkCanvas canvas(bmp); 43 SkPoint pts[] = { {0, 0}, {0, SkIntToScalar(height)} }; 44 SkColor colors0[] = { 0xFF1060B0 , 0xFF102030 }; 45 paint.setShader(SkGradientShader::CreateLinear(pts, colors0, nullptr, 2, 46 SkShader::kClamp_TileMode))->unref(); 47 canvas.drawPaint(paint); 48 49 SkColor colors1[] = { 0xFFA07010 , 0xFFA02080 }; 50 paint.setAntiAlias(true); 51 paint.setShader(SkGradientShader::CreateLinear(pts, colors1, nullptr, 2, 52 SkShader::kClamp_TileMode))->unref(); 53 canvas.drawCircle(SkIntToScalar(width) / 2, SkIntToScalar(height) / 2, 54 SkIntToScalar(width + height) / 5, paint); 55 } 56 57 SkImage* createRectangleTextureImg(GrContext* context, int width, int height, void* pixels) { 58 if (!context) { 59 return nullptr; 60 } 61 GrGpu* gpu = context->getGpu(); 62 if (!gpu) { 63 return nullptr; 64 } 65 const GrGLContext* glCtx = gpu->glContextForTesting(); 66 if (!glCtx) { 67 return nullptr; 68 } 69 70 if (!(kGL_GrGLStandard == glCtx->standard() && glCtx->version() >= GR_GL_VER(3, 1)) && 71 !glCtx->hasExtension("GL_ARB_texture_rectangle")) { 72 return nullptr; 73 } 74 75 // We will always create the GL texture as GL_RGBA, however the pixels uploaded may be 76 // be RGBA or BGRA, depending on how SkPMColor was compiled. 77 GrGLenum format; 78 if (kSkia8888_GrPixelConfig == kBGRA_8888_GrPixelConfig) { 79 format = GR_GL_BGRA; 80 } else { 81 SkASSERT(kSkia8888_GrPixelConfig == kRGBA_8888_GrPixelConfig); 82 format = GR_GL_RGBA; 83 } 84 85 const GrGLInterface* gl = glCtx->interface(); 86 // Useful for debugging whether errors result from use of RECTANGLE 87 // #define TARGET GR_GL_TEXTURE_2D 88 #define TARGET GR_GL_TEXTURE_RECTANGLE 89 GrGLuint id; 90 GR_GL_CALL(gl, GenTextures(1, &id)); 91 GR_GL_CALL(gl, BindTexture(TARGET, id)); 92 GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_MAG_FILTER, 93 GR_GL_NEAREST)); 94 GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_MIN_FILTER, 95 GR_GL_NEAREST)); 96 GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_WRAP_S, 97 GR_GL_CLAMP_TO_EDGE)); 98 GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_WRAP_T, 99 GR_GL_CLAMP_TO_EDGE)); 100 GR_GL_CALL(gl, TexImage2D(TARGET, 0, GR_GL_RGBA, width, height, 0, 101 format, GR_GL_UNSIGNED_BYTE, pixels)); 102 103 104 context->resetContext(); 105 GrGLTextureInfo info; 106 info.fID = id; 107 info.fTarget = TARGET; 108 GrBackendTextureDesc desc; 109 desc.fConfig = kRGBA_8888_GrPixelConfig; 110 desc.fWidth = width; 111 desc.fHeight = height; 112 desc.fOrigin = kTopLeft_GrSurfaceOrigin; 113 desc.fTextureHandle = reinterpret_cast<GrBackendObject>(&info); 114 if (SkImage* image = SkImage::NewFromAdoptedTexture(context, desc)) { 115 return image; 116 } 117 GR_GL_CALL(gl, DeleteTextures(1, &id)); 118 return nullptr; 119 } 120 121 void onDraw(SkCanvas* canvas) override { 122 GrRenderTarget* rt = canvas->internal_private_accessTopLayerRenderTarget(); 123 GrContext* context; 124 if (!rt || !(context = rt->getContext())) { 125 skiagm::GM::DrawGpuOnlyMessage(canvas); 126 return; 127 } 128 129 static const int kWidth = 50; 130 static const int kHeight = 50; 131 static const SkScalar kPad = 5.f; 132 133 SkPMColor pixels[kWidth * kHeight]; 134 this->fillPixels(kWidth, kHeight, pixels); 135 SkAutoTUnref<SkImage> rectImg(this->createRectangleTextureImg(context, kWidth, kHeight, 136 pixels)); 137 138 if (!rectImg) { 139 SkPaint paint; 140 paint.setAntiAlias(true); 141 static const char* kMsg = "Could not create rectangle texture image."; 142 canvas->drawText(kMsg, strlen(kMsg), 10, 100, paint); 143 return; 144 } 145 146 static const SkFilterQuality kQualities[] = { 147 kNone_SkFilterQuality, 148 kLow_SkFilterQuality, 149 kMedium_SkFilterQuality, 150 kHigh_SkFilterQuality, 151 }; 152 153 static const 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, 0, 0, &plainPaint); 163 canvas->translate(kWidth + kPad, 0); 164 165 SkPaint clampPaint; 166 clampPaint.setFilterQuality(q); 167 clampPaint.setShader(rectImg->newShader(SkShader::kClamp_TileMode, 168 SkShader::kClamp_TileMode))->unref(); 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->newShader(SkShader::kRepeat_TileMode, 175 SkShader::kMirror_TileMode))->unref(); 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
