bsalomon | e179a91 | 2016-01-20 06:18:10 -0800 | [diff] [blame] | 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 |