texdata.cpp revision 96fcdcc219d2a0d3579719b84b28bede76efba64 
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 "GrDrawContext.h"
16#include "SkColorPriv.h"
17#include "effects/GrPorterDuffXferProcessor.h"
18#include "effects/GrSimpleTextureEffect.h"
19
20namespace skiagm {
21
22static const int S = 200;
23
24class TexDataGM : public GM {
25public:
26    TexDataGM() {
27        this->setBGColor(0xff000000);
28    }
29
30protected:
31    SkString onShortName() override {
32        return SkString("texdata");
33    }
34
35    SkISize onISize() override {
36        return SkISize::Make(2*S, 2*S);
37    }
38
39    void onDraw(SkCanvas* canvas) override {
40        GrRenderTarget* target = canvas->internal_private_accessTopLayerRenderTarget();
41        GrContext* ctx = canvas->getGrContext();
42        GrDrawContext* drawContext = ctx ? ctx->drawContext() : nullptr;
43        if (drawContext && target) {
44            SkAutoTArray<SkPMColor> gTextureData((2 * S) * (2 * S));
45            static const int stride = 2 * S;
46            static const SkPMColor gray  = SkPackARGB32(0x40, 0x40, 0x40, 0x40);
47            static const SkPMColor white = SkPackARGB32(0xff, 0xff, 0xff, 0xff);
48            static const SkPMColor red   = SkPackARGB32(0x80, 0x80, 0x00, 0x00);
49            static const SkPMColor blue  = SkPackARGB32(0x80, 0x00, 0x00, 0x80);
50            static const SkPMColor green = SkPackARGB32(0x80, 0x00, 0x80, 0x00);
51            static const SkPMColor black = SkPackARGB32(0x00, 0x00, 0x00, 0x00);
52            for (int i = 0; i < 2; ++i) {
53                int offset = 0;
54                // fill upper-left
55                for (int y = 0; y < S; ++y) {
56                    for (int x = 0; x < S; ++x) {
57                        gTextureData[offset + y * stride + x] = gray;
58                    }
59                }
60                // fill upper-right
61                offset = S;
62                for (int y = 0; y < S; ++y) {
63                    for (int x = 0; x < S; ++x) {
64                        gTextureData[offset + y * stride + x] = white;
65                    }
66                }
67                // fill lower left
68                offset = S * stride;
69                for (int y = 0; y < S; ++y) {
70                    for (int x = 0; x < S; ++x) {
71                        gTextureData[offset + y * stride + x] = black;
72                    }
73                }
74                // fill lower right
75                offset = S * stride + S;
76                for (int y = 0; y < S; ++y) {
77                    for (int x = 0; x < S; ++x) {
78                        gTextureData[offset + y * stride + x] = gray;
79                    }
80                }
81
82                GrSurfaceDesc desc;
83                // use RT flag bit because in GL it makes the texture be bottom-up
84                desc.fFlags     = i ? kRenderTarget_GrSurfaceFlag :
85                                      kNone_GrSurfaceFlags;
86                desc.fConfig    = kSkia8888_GrPixelConfig;
87                desc.fWidth     = 2 * S;
88                desc.fHeight    = 2 * S;
89                GrTexture* texture = ctx->textureProvider()->createTexture(
90                    desc, false, gTextureData.get(), 0);
91
92                if (!texture) {
93                    return;
94                }
95                SkAutoTUnref<GrTexture> au(texture);
96
97                // setup new clip
98                GrClip clip(SkRect::MakeWH(2*S, 2*S));
99
100                GrPaint paint;
101                paint.setPorterDuffXPFactory(SkXfermode::kSrcOver_Mode);
102
103                SkMatrix vm;
104                if (i) {
105                    vm.setRotate(90 * SK_Scalar1,
106                                 S * SK_Scalar1,
107                                 S * SK_Scalar1);
108                } else {
109                    vm.reset();
110                }
111                SkMatrix tm;
112                tm = vm;
113                tm.postIDiv(2*S, 2*S);
114                paint.addColorTextureProcessor(texture, tm);
115
116                drawContext->drawRect(target, clip, paint, vm, 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                drawContext->drawRect(target, clip, paint, vm, SkRect::MakeWH(2*S, 2*S));
131            }
132        } else {
133            this->drawGpuOnlyMessage(canvas);
134        }
135    }
136
137private:
138    typedef GM INHERITED;
139};
140
141//////////////////////////////////////////////////////////////////////////////
142
143static GM* MyFactory(void*) { return new TexDataGM; }
144static GMRegistry reg(MyFactory);
145
146}
147
148#endif
149