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 18 namespace skiagm { 19 20 static const int S = 200; 21 22 class TexDataGM : public GM { 23 public: 24 TexDataGM() { 25 this->setBGColor(0xff000000); 26 } 27 28 protected: 29 virtual SkString onShortName() { 30 return SkString("texdata"); 31 } 32 33 virtual SkISize onISize() { 34 return SkISize::Make(2*S, 2*S); 35 } 36 37 virtual uint32_t onGetFlags() const SK_OVERRIDE { return kGPUOnly_Flag; } 38 39 virtual void onDraw(SkCanvas* canvas) { 40 GrRenderTarget* target = canvas->internal_private_accessTopLayerRenderTarget(); 41 GrContext* ctx = canvas->getGrContext(); 42 if (ctx && target) { 43 SkAutoTArray<SkPMColor> gTextureData((2 * S) * (2 * S)); 44 static const int stride = 2 * S; 45 static const SkPMColor gray = SkPackARGB32(0x40, 0x40, 0x40, 0x40); 46 static const SkPMColor white = SkPackARGB32(0xff, 0xff, 0xff, 0xff); 47 static const SkPMColor red = SkPackARGB32(0x80, 0x80, 0x00, 0x00); 48 static const SkPMColor blue = SkPackARGB32(0x80, 0x00, 0x00, 0x80); 49 static const SkPMColor green = SkPackARGB32(0x80, 0x00, 0x80, 0x00); 50 static const SkPMColor black = SkPackARGB32(0x00, 0x00, 0x00, 0x00); 51 for (int i = 0; i < 2; ++i) { 52 int offset = 0; 53 // fill upper-left 54 for (int y = 0; y < S; ++y) { 55 for (int x = 0; x < S; ++x) { 56 gTextureData[offset + y * stride + x] = gray; 57 } 58 } 59 // fill upper-right 60 offset = S; 61 for (int y = 0; y < S; ++y) { 62 for (int x = 0; x < S; ++x) { 63 gTextureData[offset + y * stride + x] = white; 64 } 65 } 66 // fill lower left 67 offset = S * stride; 68 for (int y = 0; y < S; ++y) { 69 for (int x = 0; x < S; ++x) { 70 gTextureData[offset + y * stride + x] = black; 71 } 72 } 73 // fill lower right 74 offset = S * stride + S; 75 for (int y = 0; y < S; ++y) { 76 for (int x = 0; x < S; ++x) { 77 gTextureData[offset + y * stride + x] = gray; 78 } 79 } 80 81 GrTextureDesc desc; 82 // use RT flag bit because in GL it makes the texture be bottom-up 83 desc.fFlags = i ? kRenderTarget_GrTextureFlagBit : 84 kNone_GrTextureFlags; 85 desc.fConfig = kSkia8888_GrPixelConfig; 86 desc.fWidth = 2 * S; 87 desc.fHeight = 2 * S; 88 GrTexture* texture = 89 ctx->createUncachedTexture(desc, gTextureData.get(), 0); 90 91 if (!texture) { 92 return; 93 } 94 SkAutoUnref au(texture); 95 96 GrContext::AutoClip acs(ctx, SkRect::MakeWH(2*S, 2*S)); 97 98 ctx->setRenderTarget(target); 99 100 GrPaint paint; 101 paint.setBlendFunc(kOne_GrBlendCoeff, kISA_GrBlendCoeff); 102 SkMatrix vm; 103 if (i) { 104 vm.setRotate(90 * SK_Scalar1, 105 S * SK_Scalar1, 106 S * SK_Scalar1); 107 } else { 108 vm.reset(); 109 } 110 ctx->setMatrix(vm); 111 SkMatrix tm; 112 tm = vm; 113 tm.postIDiv(2*S, 2*S); 114 paint.addColorTextureEffect(texture, tm); 115 116 ctx->drawRect(paint, SkRect::MakeWH(2*S, 2*S)); 117 118 // now update the lower right of the texture in first pass 119 // or upper right in second pass 120 offset = 0; 121 for (int y = 0; y < S; ++y) { 122 for (int x = 0; x < S; ++x) { 123 gTextureData[offset + y * stride + x] = 124 ((x + y) % 2) ? (i ? green : red) : blue; 125 } 126 } 127 texture->writePixels(S, (i ? 0 : S), S, S, 128 texture->config(), gTextureData.get(), 129 4 * stride); 130 ctx->drawRect(paint, SkRect::MakeWH(2*S, 2*S)); 131 } 132 } 133 } 134 135 private: 136 typedef GM INHERITED; 137 }; 138 139 ////////////////////////////////////////////////////////////////////////////// 140 141 static GM* MyFactory(void*) { return new TexDataGM; } 142 static GMRegistry reg(MyFactory); 143 144 } 145 146 #endif 147
