1 2 /* 3 * Copyright 2011 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 #include "GrContext.h" 15 #include "effects/GrSimpleTextureEffect.h" 16 #include "SkColorPriv.h" 17 #include "SkDevice.h" 18 19 namespace skiagm { 20 21 extern GrContext* GetGr(); 22 23 static const int S = 200; 24 25 class TexDataGM : public GM { 26 public: 27 TexDataGM() { 28 this->setBGColor(0xff000000); 29 } 30 31 protected: 32 virtual SkString onShortName() { 33 return SkString("texdata"); 34 } 35 36 virtual SkISize onISize() { 37 return make_isize(2*S, 2*S); 38 } 39 40 virtual void onDraw(SkCanvas* canvas) { 41 SkDevice* device = canvas->getTopDevice(); 42 GrRenderTarget* target = device->accessRenderTarget(); 43 GrContext* ctx = GetGr(); 44 if (ctx && target) { 45 SkPMColor gTextureData[(2 * S) * (2 * S)]; 46 static const int stride = 2 * S; 47 static const SkPMColor gray = SkPackARGB32(0x40, 0x40, 0x40, 0x40); 48 static const SkPMColor white = SkPackARGB32(0xff, 0xff, 0xff, 0xff); 49 static const SkPMColor red = SkPackARGB32(0x80, 0x80, 0x00, 0x00); 50 static const SkPMColor blue = SkPackARGB32(0x80, 0x00, 0x00, 0x80); 51 static const SkPMColor green = SkPackARGB32(0x80, 0x00, 0x80, 0x00); 52 static const SkPMColor black = SkPackARGB32(0x00, 0x00, 0x00, 0x00); 53 for (int i = 0; i < 2; ++i) { 54 int offset = 0; 55 // fill upper-left 56 for (int y = 0; y < S; ++y) { 57 for (int x = 0; x < S; ++x) { 58 gTextureData[offset + y * stride + x] = gray; 59 } 60 } 61 // fill upper-right 62 offset = S; 63 for (int y = 0; y < S; ++y) { 64 for (int x = 0; x < S; ++x) { 65 gTextureData[offset + y * stride + x] = white; 66 } 67 } 68 // fill lower left 69 offset = S * stride; 70 for (int y = 0; y < S; ++y) { 71 for (int x = 0; x < S; ++x) { 72 gTextureData[offset + y * stride + x] = black; 73 } 74 } 75 // fill lower right 76 offset = S * stride + S; 77 for (int y = 0; y < S; ++y) { 78 for (int x = 0; x < S; ++x) { 79 gTextureData[offset + y * stride + x] = gray; 80 } 81 } 82 83 GrTextureDesc desc; 84 // use RT flag bit because in GL it makes the texture be bottom-up 85 desc.fFlags = i ? kRenderTarget_GrTextureFlagBit : 86 kNone_GrTextureFlags; 87 desc.fConfig = kSkia8888_GrPixelConfig; 88 desc.fWidth = 2 * S; 89 desc.fHeight = 2 * S; 90 GrTexture* texture = 91 ctx->createUncachedTexture(desc, gTextureData, 0); 92 93 if (!texture) { 94 return; 95 } 96 GrAutoUnref au(texture); 97 98 GrContext::AutoClip acs(ctx, SkRect::MakeWH(2*S, 2*S)); 99 100 ctx->setRenderTarget(target); 101 102 GrPaint paint; 103 paint.setBlendFunc(kOne_GrBlendCoeff, kISA_GrBlendCoeff); 104 SkMatrix vm; 105 if (i) { 106 vm.setRotate(90 * SK_Scalar1, 107 S * SK_Scalar1, 108 S * SK_Scalar1); 109 } else { 110 vm.reset(); 111 } 112 ctx->setMatrix(vm); 113 SkMatrix tm; 114 tm = vm; 115 tm.postIDiv(2*S, 2*S); 116 paint.addColorTextureEffect(texture, tm); 117 118 ctx->drawRect(paint, SkRect::MakeWH(2*S, 2*S)); 119 120 // now update the lower right of the texture in first pass 121 // or upper right in second pass 122 offset = 0; 123 for (int y = 0; y < S; ++y) { 124 for (int x = 0; x < S; ++x) { 125 gTextureData[offset + y * stride + x] = 126 ((x + y) % 2) ? (i ? green : red) : blue; 127 } 128 } 129 texture->writePixels(S, (i ? 0 : S), S, S, 130 texture->config(), gTextureData, 131 4 * stride); 132 ctx->drawRect(paint, SkRect::MakeWH(2*S, 2*S)); 133 } 134 } 135 } 136 137 private: 138 typedef GM INHERITED; 139 }; 140 141 ////////////////////////////////////////////////////////////////////////////// 142 143 static GM* MyFactory(void*) { return new TexDataGM; } 144 static GMRegistry reg(MyFactory); 145 146 } 147 148 #endif 149
