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 "GrContextPriv.h" 17 #include "GrGpu.h" 18 #include "GrTest.h" 19 #include "gl/GrGLContext.h" 20 #include "SkBitmap.h" 21 #include "SkGradientShader.h" 22 #include "SkImage.h" 23 24 namespace skiagm { 25 class RectangleTexture : public GM { 26 public: 27 RectangleTexture() { 28 this->setBGColor(0xFFFFFFFF); 29 } 30 31 protected: 32 SkString onShortName() override { 33 return SkString("rectangle_texture"); 34 } 35 36 SkISize onISize() override { 37 return SkISize::Make(1035, 240); 38 } 39 40 void fillPixels(int width, int height, void *pixels) { 41 SkBitmap bmp; 42 bmp.setInfo(SkImageInfo::MakeN32(width, height, kOpaque_SkAlphaType), width * 4); 43 bmp.setPixels(pixels); 44 SkPaint paint; 45 SkCanvas canvas(bmp); 46 SkPoint pts[] = { {0, 0}, {0, SkIntToScalar(height)} }; 47 SkColor colors0[] = { 0xFF1060B0 , 0xFF102030 }; 48 paint.setShader(SkGradientShader::MakeLinear(pts, colors0, nullptr, 2, 49 SkShader::kClamp_TileMode)); 50 canvas.drawPaint(paint); 51 52 SkColor colors1[] = { 0xFFA07010 , 0xFFA02080 }; 53 paint.setAntiAlias(true); 54 paint.setShader(SkGradientShader::MakeLinear(pts, colors1, nullptr, 2, 55 SkShader::kClamp_TileMode)); 56 canvas.drawCircle(SkIntToScalar(width) / 2, SkIntToScalar(height) / 2, 57 SkIntToScalar(width + height) / 5, paint); 58 } 59 60 sk_sp<SkImage> createRectangleTextureImg(GrContext* context, int width, int height, 61 void* pixels) { 62 if (!context) { 63 return nullptr; 64 } 65 GrGpu* gpu = context->contextPriv().getGpu(); 66 if (!gpu) { 67 return nullptr; 68 } 69 const GrGLContext* glCtx = gpu->glContextForTesting(); 70 if (!glCtx) { 71 return nullptr; 72 } 73 74 if (!(kGL_GrGLStandard == glCtx->standard() && glCtx->version() >= GR_GL_VER(3, 1)) && 75 !glCtx->hasExtension("GL_ARB_texture_rectangle")) { 76 return nullptr; 77 } 78 79 // We will always create the GL texture as GL_RGBA, however the pixels uploaded may be 80 // be RGBA or BGRA, depending on how SkPMColor was compiled. 81 GrGLenum format; 82 if (kSkia8888_GrPixelConfig == kBGRA_8888_GrPixelConfig) { 83 format = GR_GL_BGRA; 84 } else { 85 SkASSERT(kSkia8888_GrPixelConfig == kRGBA_8888_GrPixelConfig); 86 format = GR_GL_RGBA; 87 } 88 89 const GrGLInterface* gl = glCtx->interface(); 90 // Useful for debugging whether errors result from use of RECTANGLE 91 // #define TARGET GR_GL_TEXTURE_2D 92 #define TARGET GR_GL_TEXTURE_RECTANGLE 93 GrGLuint id = 0; 94 GR_GL_CALL(gl, GenTextures(1, &id)); 95 GR_GL_CALL(gl, BindTexture(TARGET, id)); 96 GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_MAG_FILTER, 97 GR_GL_NEAREST)); 98 GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_MIN_FILTER, 99 GR_GL_NEAREST)); 100 GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_WRAP_S, 101 GR_GL_CLAMP_TO_EDGE)); 102 GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_WRAP_T, 103 GR_GL_CLAMP_TO_EDGE)); 104 GR_GL_CALL(gl, TexImage2D(TARGET, 0, GR_GL_RGBA, width, height, 0, 105 format, GR_GL_UNSIGNED_BYTE, pixels)); 106 107 108 context->resetContext(); 109 GrGLTextureInfo info; 110 info.fID = id; 111 info.fTarget = TARGET; 112 info.fFormat = GR_GL_RGBA8; 113 114 GrBackendTexture rectangleTex(width, height, GrMipMapped::kNo, info); 115 116 if (sk_sp<SkImage> image = SkImage::MakeFromAdoptedTexture(context, rectangleTex, 117 kTopLeft_GrSurfaceOrigin, 118 kRGBA_8888_SkColorType)) { 119 return image; 120 } 121 GR_GL_CALL(gl, DeleteTextures(1, &id)); 122 return nullptr; 123 } 124 125 void onDraw(SkCanvas* canvas) override { 126 GrContext *context = canvas->getGrContext(); 127 if (!context) { 128 skiagm::GM::DrawGpuOnlyMessage(canvas); 129 return; 130 } 131 132 constexpr int kWidth = 50; 133 constexpr int kHeight = 50; 134 constexpr SkScalar kPad = 5.f; 135 136 SkPMColor pixels[kWidth * kHeight]; 137 this->fillPixels(kWidth, kHeight, pixels); 138 sk_sp<SkImage> rectImg(this->createRectangleTextureImg(context, kWidth, kHeight, pixels)); 139 140 if (!rectImg) { 141 SkPaint paint; 142 paint.setAntiAlias(true); 143 const char* kMsg = "Could not create rectangle texture image."; 144 canvas->drawString(kMsg, 10, 100, paint); 145 return; 146 } 147 148 constexpr SkFilterQuality kQualities[] = { 149 kNone_SkFilterQuality, 150 kLow_SkFilterQuality, 151 kMedium_SkFilterQuality, 152 kHigh_SkFilterQuality, 153 }; 154 155 constexpr SkScalar kScales[] = { 1.0f, 1.2f, 0.75f }; 156 157 canvas->translate(kPad, kPad); 158 for (auto s : kScales) { 159 canvas->save(); 160 canvas->scale(s, s); 161 for (auto q : kQualities) { 162 SkPaint plainPaint; 163 plainPaint.setFilterQuality(q); 164 canvas->drawImage(rectImg.get(), 0, 0, &plainPaint); 165 canvas->translate(kWidth + kPad, 0); 166 167 SkPaint clampPaint; 168 clampPaint.setFilterQuality(q); 169 clampPaint.setShader(rectImg->makeShader()); 170 canvas->drawRect(SkRect::MakeWH(1.5f * kWidth, 1.5f * kHeight), clampPaint); 171 canvas->translate(kWidth * 1.5f + kPad, 0); 172 173 SkPaint repeatPaint; 174 repeatPaint.setFilterQuality(q); 175 repeatPaint.setShader(rectImg->makeShader(SkShader::kRepeat_TileMode, 176 SkShader::kMirror_TileMode)); 177 canvas->drawRect(SkRect::MakeWH(1.5f * kWidth, 1.5f * kHeight), repeatPaint); 178 canvas->translate(1.5f * kWidth + kPad, 0); 179 } 180 canvas->restore(); 181 canvas->translate(0, kPad + 1.5f * kHeight * s); 182 } 183 } 184 185 private: 186 typedef GM INHERITED; 187 }; 188 189 DEF_GM(return new RectangleTexture;) 190 } 191 192 #endif 193
