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 #include "gm.h"
9 #include "SkCanvas.h"
10 #include "SkColorPriv.h"
11 #include "SkShader.h"
12 #include "SkSurface.h"
13
14 #include "SkColorMatrixFilter.h"
15 #include "SkGradientShader.h"
16
make_opaque_color()17 static SkShader* make_opaque_color() {
18 return SkShader::CreateColorShader(0xFFFF0000);
19 }
20
make_alpha_color()21 static SkShader* make_alpha_color() {
22 return SkShader::CreateColorShader(0x80FF0000);
23 }
24
make_cf_null()25 static SkColorFilter* make_cf_null() {
26 return nullptr;
27 }
28
make_cf0()29 static SkColorFilter* make_cf0() {
30 SkColorMatrix cm;
31 cm.setSaturation(0.75f);
32 return SkColorMatrixFilter::Create(cm);
33 }
34
make_cf1()35 static SkColorFilter* make_cf1() {
36 SkColorMatrix cm;
37 cm.setSaturation(0.75f);
38 SkAutoTUnref<SkColorFilter> a(SkColorMatrixFilter::Create(cm));
39 // CreateComposedFilter will try to concat these two matrices, resulting in a single
40 // filter (which is good for speed). For this test, we want to force a real compose of
41 // these two, so our inner filter has a scale-up, which disables the optimization of
42 // combining the two matrices.
43 cm.setScale(1.1f, 0.9f, 1);
44 SkAutoTUnref<SkColorFilter> b(SkColorMatrixFilter::Create(cm));
45 return SkColorFilter::CreateComposeFilter(a, b);
46 }
47
make_cf2()48 static SkColorFilter* make_cf2() {
49 return SkColorFilter::CreateModeFilter(0x8044CC88, SkXfermode::kSrcATop_Mode);
50 }
51
draw_into_canvas(SkCanvas * canvas)52 static void draw_into_canvas(SkCanvas* canvas) {
53 const SkRect r = SkRect::MakeWH(50, 100);
54 SkShader* (*shaders[])() { make_opaque_color, make_alpha_color };
55 SkColorFilter* (*filters[])() { make_cf_null, make_cf0, make_cf1, make_cf2 };
56
57 SkPaint paint;
58 for (auto shProc : shaders) {
59 paint.setShader(shProc())->unref();
60 for (auto cfProc : filters) {
61 SkSafeUnref(paint.setColorFilter(cfProc()));
62 canvas->drawRect(r, paint);
63 canvas->translate(60, 0);
64 }
65 }
66 }
67
68 DEF_SIMPLE_GM(color4f, canvas, 1024, 260) {
69 canvas->translate(10, 10);
70
71 SkPaint bg;
72 // need the target to be opaque, so we can draw it to the screen
73 // even if it holds sRGB values.
74 bg.setColor(0xFFFFFFFF);
75
76 SkColorProfileType const profiles[] { kLinear_SkColorProfileType, kSRGB_SkColorProfileType };
77 for (auto profile : profiles) {
78 const SkImageInfo info = SkImageInfo::Make(1024, 100, kN32_SkColorType, kPremul_SkAlphaType,
79 profile);
80 SkAutoTUnref<SkSurface> surface(SkSurface::NewRaster(info));
81 surface->getCanvas()->drawPaint(bg);
82 draw_into_canvas(surface->getCanvas());
83 surface->draw(canvas, 0, 0, nullptr);
84 canvas->translate(0, 120);
85 }
86 }
87