texdata.cpp revision 175dd9b5e3d7d749738dac743d2ac360b5340187 
1/*
2 * Copyright 2011 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8// This test only works with the GPU backend.
9
10#include "gm.h"
11
12#if SK_SUPPORT_GPU
13#include "GrContext.h"
14#include "GrDrawContext.h"
15#include "SkColorPriv.h"
16#include "effects/GrPorterDuffXferProcessor.h"
17#include "effects/GrSimpleTextureEffect.h"
18
19static const int S = 200;
20
21DEF_SIMPLE_GM_BG(texdata, canvas, 2 * S, 2 * S, SK_ColorBLACK) {
22    GrDrawContext* drawContext = canvas->internal_private_accessTopLayerDrawContext();
23    if (!drawContext) {
24        skiagm::GM::DrawGpuOnlyMessage(canvas);
25        return;
26    }
27
28    GrContext* context = canvas->getGrContext();
29    if (!context) {
30        return;
31    }
32
33    SkAutoTArray<SkPMColor> gTextureData((2 * S) * (2 * S));
34    static const int stride = 2 * S;
35    static const SkPMColor gray  = SkPackARGB32(0x40, 0x40, 0x40, 0x40);
36    static const SkPMColor white = SkPackARGB32(0xff, 0xff, 0xff, 0xff);
37    static const SkPMColor red   = SkPackARGB32(0x80, 0x80, 0x00, 0x00);
38    static const SkPMColor blue  = SkPackARGB32(0x80, 0x00, 0x00, 0x80);
39    static const SkPMColor green = SkPackARGB32(0x80, 0x00, 0x80, 0x00);
40    static const SkPMColor black = SkPackARGB32(0x00, 0x00, 0x00, 0x00);
41    for (int i = 0; i < 2; ++i) {
42        int offset = 0;
43        // fill upper-left
44        for (int y = 0; y < S; ++y) {
45            for (int x = 0; x < S; ++x) {
46                gTextureData[offset + y * stride + x] = gray;
47            }
48        }
49        // fill upper-right
50        offset = S;
51        for (int y = 0; y < S; ++y) {
52            for (int x = 0; x < S; ++x) {
53                gTextureData[offset + y * stride + x] = white;
54            }
55        }
56        // fill lower left
57        offset = S * stride;
58        for (int y = 0; y < S; ++y) {
59            for (int x = 0; x < S; ++x) {
60                gTextureData[offset + y * stride + x] = black;
61            }
62        }
63        // fill lower right
64        offset = S * stride + S;
65        for (int y = 0; y < S; ++y) {
66            for (int x = 0; x < S; ++x) {
67                gTextureData[offset + y * stride + x] = gray;
68            }
69        }
70
71        GrSurfaceDesc desc;
72        // use RT flag bit because in GL it makes the texture be bottom-up
73        desc.fFlags     = i ? kRenderTarget_GrSurfaceFlag :
74                                kNone_GrSurfaceFlags;
75        desc.fConfig    = kSkia8888_GrPixelConfig;
76        desc.fWidth     = 2 * S;
77        desc.fHeight    = 2 * S;
78        GrTexture* texture = context->textureProvider()->createTexture(
79            desc, SkBudgeted::kNo, gTextureData.get(), 0);
80
81        if (!texture) {
82            return;
83        }
84        SkAutoTUnref<GrTexture> au(texture);
85
86        // setup new clip
87        GrClip clip(SkRect::MakeWH(2*S, 2*S));
88
89        GrPaint paint;
90        paint.setPorterDuffXPFactory(SkXfermode::kSrcOver_Mode);
91
92        SkMatrix vm;
93        if (i) {
94            vm.setRotate(90 * SK_Scalar1,
95                            S * SK_Scalar1,
96                            S * SK_Scalar1);
97        } else {
98            vm.reset();
99        }
100        SkMatrix tm;
101        tm = vm;
102        tm.postIDiv(2*S, 2*S);
103        paint.addColorTextureProcessor(texture, tm);
104
105        drawContext->drawRect(clip, paint, vm, SkRect::MakeWH(2*S, 2*S));
106
107        // now update the lower right of the texture in first pass
108        // or upper right in second pass
109        offset = 0;
110        for (int y = 0; y < S; ++y) {
111            for (int x = 0; x < S; ++x) {
112                gTextureData[offset + y * stride + x] =
113                    ((x + y) % 2) ? (i ? green : red) : blue;
114            }
115        }
116        texture->writePixels(S, (i ? 0 : S), S, S,
117                                texture->config(), gTextureData.get(),
118                                4 * stride);
119        drawContext->drawRect(clip, paint, vm, SkRect::MakeWH(2*S, 2*S));
120    }
121}
122#endif
123
124