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:
TexDataGM()24 TexDataGM() {
25 this->setBGColor(0xff000000);
26 }
27
28 protected:
onShortName()29 virtual SkString onShortName() {
30 return SkString("texdata");
31 }
32
onISize()33 virtual SkISize onISize() {
34 return SkISize::Make(2*S, 2*S);
35 }
36
onGetFlags() const37 virtual uint32_t onGetFlags() const SK_OVERRIDE { return kGPUOnly_Flag; }
38
onDraw(SkCanvas * canvas)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
MyFactory(void *)141 static GM* MyFactory(void*) { return new TexDataGM; }
142 static GMRegistry reg(MyFactory);
143
144 }
145
146 #endif
147