GpuColorFilterTest.cpp revision f1b7a1d82860e106ed7d3e0e876419e65783fb84 
1
2/*
3 * Copyright 2013 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#include "SkColorFilter.h"
10#include "Test.h"
11
12#if SK_SUPPORT_GPU
13
14#include "GrContext.h"
15#include "GrContextFactory.h"
16#include "GrFragmentProcessor.h"
17#include "GrInvariantOutput.h"
18#include "SkGr.h"
19
20static GrColor filterColor(const GrColor& color, uint32_t flags)  {
21    uint32_t mask = 0;
22    if (flags & kR_GrColorComponentFlag) {
23        mask = 0xFF << GrColor_SHIFT_R;
24    }
25    if (flags & kG_GrColorComponentFlag) {
26        mask |= 0xFF << GrColor_SHIFT_G;
27    }
28    if (flags & kB_GrColorComponentFlag) {
29        mask |= 0xFF << GrColor_SHIFT_B;
30    }
31    if (flags & kA_GrColorComponentFlag) {
32        mask |= 0xFF << GrColor_SHIFT_A;
33    }
34    return color & mask;
35}
36
37static void test_getConstantColorComponents(skiatest::Reporter* reporter, GrContext* grContext) {
38    struct GetConstantComponentTestCase {
39        // "Shape drawn with"
40        uint32_t inputComponents; // "rgb of", "red of", "alpha of", ...
41        GrColor inputColor;       // "[color]"
42
43        SkColor filterColor;      // "with filter color [color]"
44        SkXfermode::Mode filterMode; // "in mode [mode]"
45
46        // "produces"
47        uint32_t outputComponents; // "rgb of", "red of", "alpha of", ...
48        GrColor outputColor;       // "[color]"
49    };
50
51    // Shorthands.
52    enum {
53        kR = kR_GrColorComponentFlag,
54        kG = kG_GrColorComponentFlag,
55        kB = kB_GrColorComponentFlag,
56        kA = kA_GrColorComponentFlag,
57        kRGB = kRGB_GrColorComponentFlags,
58        kRGBA = kRGBA_GrColorComponentFlags
59    };
60
61    // Note: below, SkColors are non-premultiplied, where as GrColors are premultiplied.
62
63    const SkColor c1 = SkColorSetARGB(200, 200, 200, 200);
64    const SkColor c2 = SkColorSetARGB(60, 60, 60, 60);
65    const GrColor gr_c1 = SkColorToPremulGrColor(c1);
66    const GrColor gr_c2 = SkColorToPremulGrColor(c2);
67
68    const GrColor gr_black = GrColorPackA4(0);
69    const GrColor gr_white = GrColorPackA4(255);
70    const GrColor gr_whiteTrans = GrColorPackA4(128);
71
72    GetConstantComponentTestCase filterTests[] = {
73        // A color filtered with Clear produces black.
74        { kRGBA, gr_white, SK_ColorBLACK, SkXfermode::kClear_Mode, kRGBA, gr_black },
75        { kRGBA, gr_c1,    SK_ColorWHITE, SkXfermode::kClear_Mode, kRGBA, gr_black },
76        { kR,    gr_white, c1,            SkXfermode::kClear_Mode, kRGBA, gr_black },
77
78        // A color filtered with a color in mode Src, produces the filter color.
79        { kRGBA, gr_c2, c1, SkXfermode::kSrc_Mode, kRGBA, gr_c1 },
80        { kA,    gr_c1, c1, SkXfermode::kSrc_Mode, kRGBA, gr_c1 },
81
82        // A color filtered with SrcOver produces a color.
83        { kRGBA, gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kSrcOver_Mode, kRGBA, GrColorPackRGBA(164, 164, 164, 192)},
84        // An unknown color with known alpha filtered with SrcOver produces an unknown color with known alpha.
85        { kA   , gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kSrcOver_Mode, kA   , GrColorPackRGBA(0, 0, 0, 192)},
86        // A color with unknown alpha filtered with SrcOver produces a color with unknown alpha.
87        { kRGB , gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kSrcOver_Mode, kRGB, GrColorPackRGBA(164, 164, 164, 0)},
88
89        // A color filtered with DstOver produces a color.
90        { kRGBA, gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kDstOver_Mode, kRGBA, GrColorPackRGBA(178, 178, 178, 192)},
91        // An unknown color with known alpha filtered with DstOver produces an unknown color with known alpha.
92        { kA   , gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kDstOver_Mode, kA   , GrColorPackRGBA(0, 0, 0, 192)},
93        // A color with unknown alpha filtered with DstOver produces an unknown color.
94        { kRGB , gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kDstOver_Mode, 0    , gr_black},
95
96        // An unknown color with known alpha and red component filtered with Multiply produces an unknown color with known red and alpha.
97        { kR|kA , gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kModulate_Mode, kR|kA, GrColorPackRGBA(50, 0, 0, 64) }
98    };
99
100    GrPaint paint;
101    for (size_t i = 0; i < SK_ARRAY_COUNT(filterTests); ++i) {
102        const GetConstantComponentTestCase& test = filterTests[i];
103        SkAutoTUnref<SkColorFilter> cf(SkColorFilter::CreateModeFilter(test.filterColor, test.filterMode));
104        SkTDArray<const GrFragmentProcessor*> array;
105        bool hasFrag = cf->asFragmentProcessors(grContext, paint.getProcessorDataManager(), &array);
106        REPORTER_ASSERT(reporter, hasFrag);
107        REPORTER_ASSERT(reporter, 1 == array.count());
108        GrInvariantOutput inout(test.inputColor,
109                                static_cast<GrColorComponentFlags>(test.inputComponents),
110                                false);
111        array[0]->computeInvariantOutput(&inout);
112
113        REPORTER_ASSERT(reporter, filterColor(inout.color(), inout.validFlags()) == test.outputColor);
114        REPORTER_ASSERT(reporter, test.outputComponents == inout.validFlags());
115        array[0]->unref();
116    }
117}
118
119DEF_GPUTEST(GpuColorFilter, reporter, factory) {
120    for (int type = 0; type < GrContextFactory::kLastGLContextType; ++type) {
121        GrContextFactory::GLContextType glType = static_cast<GrContextFactory::GLContextType>(type);
122
123        GrContext* grContext = factory->get(glType);
124        if (nullptr == grContext) {
125            continue;
126        }
127
128        test_getConstantColorComponents(reporter, grContext);
129    }
130}
131
132#endif
133