texdata.cpp revision cefc43112c8f6fe3702facb89447bdfcc2715345 
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 "GrRenderTargetContext.h"
15#include "GrFixedClip.h"
16#include "SkColorPriv.h"
17#include "effects/GrPorterDuffXferProcessor.h"
18#include "effects/GrSimpleTextureEffect.h"
19
20constexpr int S = 200;
21
22DEF_SIMPLE_GM_BG(texdata, canvas, 2 * S, 2 * S, SK_ColorBLACK) {
23    GrRenderTargetContext* renderTargetContext =
24        canvas->internal_private_accessTopLayerRenderTargetContext();
25    if (!renderTargetContext) {
26        skiagm::GM::DrawGpuOnlyMessage(canvas);
27        return;
28    }
29
30    GrContext* context = canvas->getGrContext();
31    if (!context) {
32        return;
33    }
34
35    SkAutoTArray<SkPMColor> gTextureData((2 * S) * (2 * S));
36    constexpr int stride = 2 * S;
37    const SkPMColor gray  = SkPackARGB32(0x40, 0x40, 0x40, 0x40);
38    const SkPMColor white = SkPackARGB32(0xff, 0xff, 0xff, 0xff);
39    const SkPMColor red   = SkPackARGB32(0x80, 0x80, 0x00, 0x00);
40    const SkPMColor blue  = SkPackARGB32(0x80, 0x00, 0x00, 0x80);
41    const SkPMColor green = SkPackARGB32(0x80, 0x00, 0x80, 0x00);
42    const SkPMColor black = SkPackARGB32(0x00, 0x00, 0x00, 0x00);
43    for (int i = 0; i < 2; ++i) {
44        int offset = 0;
45        // fill upper-left
46        for (int y = 0; y < S; ++y) {
47            for (int x = 0; x < S; ++x) {
48                gTextureData[offset + y * stride + x] = gray;
49            }
50        }
51        // fill upper-right
52        offset = S;
53        for (int y = 0; y < S; ++y) {
54            for (int x = 0; x < S; ++x) {
55                gTextureData[offset + y * stride + x] = white;
56            }
57        }
58        // fill lower left
59        offset = S * stride;
60        for (int y = 0; y < S; ++y) {
61            for (int x = 0; x < S; ++x) {
62                gTextureData[offset + y * stride + x] = black;
63            }
64        }
65        // fill lower right
66        offset = S * stride + S;
67        for (int y = 0; y < S; ++y) {
68            for (int x = 0; x < S; ++x) {
69                gTextureData[offset + y * stride + x] = gray;
70            }
71        }
72
73        GrSurfaceDesc desc;
74        desc.fOrigin    = i ? kBottomLeft_GrSurfaceOrigin : kTopLeft_GrSurfaceOrigin;
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        sk_sp<GrTexture> au(texture);
85
86        // setup new clip
87        GrFixedClip clip(SkIRect::MakeWH(2*S, 2*S));
88
89        GrPaint paint;
90        paint.setPorterDuffXPFactory(SkBlendMode::kSrcOver);
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, nullptr, tm);
104
105        renderTargetContext->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        renderTargetContext->drawRect(clip, paint, vm, SkRect::MakeWH(2*S, 2*S));
120    }
121}
122#endif
123
124