blob: 1d866c601067d4a93443d11d393d79d20d08166f [file] [log] [blame]
commit-bot@chromium.org7842c812013-12-06 20:14:39 +00001
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#include "gm.h"
9
10#include "SkBitmap.h"
11#include "SkPaint.h"
12#include "SkShader.h"
13
14namespace skiagm {
15
16static void draw_bm(SkBitmap* bm) {
skia.committer@gmail.com56710d12013-12-07 07:02:21 +000017 SkPaint bluePaint;
18 bluePaint.setColor(SK_ColorBLUE);
commit-bot@chromium.org7842c812013-12-06 20:14:39 +000019
reed@google.comeb9a46c2014-01-25 16:46:20 +000020 bm->allocN32Pixels(20, 20);
skia.committer@gmail.com56710d12013-12-07 07:02:21 +000021 bm->eraseColor(SK_ColorRED);
commit-bot@chromium.org7842c812013-12-06 20:14:39 +000022
skia.committer@gmail.com56710d12013-12-07 07:02:21 +000023 SkCanvas canvas(*bm);
24 canvas.drawCircle(10, 10, 5, bluePaint);
commit-bot@chromium.org7842c812013-12-06 20:14:39 +000025}
26
27static void draw_mask(SkBitmap* bm) {
skia.committer@gmail.com56710d12013-12-07 07:02:21 +000028 SkPaint circlePaint;
29 circlePaint.setColor(SK_ColorBLACK);
commit-bot@chromium.org7842c812013-12-06 20:14:39 +000030
commit-bot@chromium.orgdac52252014-02-17 21:21:46 +000031 bm->allocPixels(SkImageInfo::MakeA8(20, 20));
skia.committer@gmail.com56710d12013-12-07 07:02:21 +000032 bm->eraseColor(SK_ColorTRANSPARENT);
commit-bot@chromium.org7842c812013-12-06 20:14:39 +000033
skia.committer@gmail.com56710d12013-12-07 07:02:21 +000034 SkCanvas canvas(*bm);
35 canvas.drawCircle(10, 10, 10, circlePaint);
commit-bot@chromium.org7842c812013-12-06 20:14:39 +000036}
37
commit-bot@chromium.org9c9005a2014-04-28 14:55:39 +000038static void adopt_shader(SkPaint* paint, SkShader* shader) {
commit-bot@chromium.orge5957f62014-03-18 16:28:12 +000039 paint->setShader(shader);
40 SkSafeUnref(shader);
41}
42
commit-bot@chromium.org7842c812013-12-06 20:14:39 +000043class BitmapShaderGM : public GM {
commit-bot@chromium.org7842c812013-12-06 20:14:39 +000044
caryclark63c684a2015-02-25 09:04:04 -080045protected:
mtklein36352bf2015-03-25 18:17:31 -070046 void onOnceBeforeDraw() override {
commit-bot@chromium.org7842c812013-12-06 20:14:39 +000047 this->setBGColor(SK_ColorGRAY);
48 draw_bm(&fBitmap);
49 draw_mask(&fMask);
50 }
51
commit-bot@chromium.org7842c812013-12-06 20:14:39 +000052 virtual SkString onShortName() {
53 return SkString("bitmapshaders");
54 }
55
56 virtual SkISize onISize() {
commit-bot@chromium.org08f6d862014-03-24 02:49:48 +000057 return SkISize::Make(150, 100);
commit-bot@chromium.org7842c812013-12-06 20:14:39 +000058 }
59
60 virtual void onDraw(SkCanvas* canvas) {
skia.committer@gmail.com56710d12013-12-07 07:02:21 +000061 SkPaint paint;
commit-bot@chromium.orge5957f62014-03-18 16:28:12 +000062
commit-bot@chromium.org08f6d862014-03-24 02:49:48 +000063 for (int i = 0; i < 2; i++) {
64 SkMatrix s;
65 s.reset();
66 if (1 == i) {
commit-bot@chromium.orga723fee2014-03-24 14:54:04 +000067 s.setScale(1.5f, 1.5f);
commit-bot@chromium.org08f6d862014-03-24 02:49:48 +000068 s.postTranslate(2, 2);
69 }
commit-bot@chromium.org7842c812013-12-06 20:14:39 +000070
commit-bot@chromium.org08f6d862014-03-24 02:49:48 +000071 canvas->save();
72 adopt_shader(&paint, SkShader::CreateBitmapShader(fBitmap, SkShader::kClamp_TileMode,
commit-bot@chromium.org9c9005a2014-04-28 14:55:39 +000073 SkShader::kClamp_TileMode, &s));
commit-bot@chromium.org7842c812013-12-06 20:14:39 +000074
commit-bot@chromium.org08f6d862014-03-24 02:49:48 +000075 // draw the shader with a bitmap mask
76 canvas->drawBitmap(fMask, 0, 0, &paint);
77 canvas->drawBitmap(fMask, 30, 0, &paint);
commit-bot@chromium.org7842c812013-12-06 20:14:39 +000078
commit-bot@chromium.org08f6d862014-03-24 02:49:48 +000079 canvas->translate(0, 25);
commit-bot@chromium.org7842c812013-12-06 20:14:39 +000080
commit-bot@chromium.org08f6d862014-03-24 02:49:48 +000081 canvas->drawCircle(10, 10, 10, paint);
82 canvas->drawCircle(40, 10, 10, paint); // no blue circle expected
commit-bot@chromium.org7842c812013-12-06 20:14:39 +000083
commit-bot@chromium.org08f6d862014-03-24 02:49:48 +000084 canvas->translate(0, 25);
commit-bot@chromium.org7842c812013-12-06 20:14:39 +000085
commit-bot@chromium.org08f6d862014-03-24 02:49:48 +000086 // clear the shader, colorized by a solid color with a bitmap mask
87 paint.setShader(NULL);
88 paint.setColor(SK_ColorGREEN);
89 canvas->drawBitmap(fMask, 0, 0, &paint);
90 canvas->drawBitmap(fMask, 30, 0, &paint);
91
92 canvas->translate(0, 25);
93
94 adopt_shader(&paint, SkShader::CreateBitmapShader(fMask, SkShader::kRepeat_TileMode,
commit-bot@chromium.org9c9005a2014-04-28 14:55:39 +000095 SkShader::kRepeat_TileMode, &s));
commit-bot@chromium.org08f6d862014-03-24 02:49:48 +000096 paint.setColor(SK_ColorRED);
97
98 // draw the mask using the shader and a color
99 canvas->drawRect(SkRect::MakeXYWH(0, 0, 20, 20), paint);
100 canvas->drawRect(SkRect::MakeXYWH(30, 0, 20, 20), paint);
101 canvas->restore();
102 canvas->translate(60, 0);
103 }
commit-bot@chromium.org7842c812013-12-06 20:14:39 +0000104 }
105
106private:
107 SkBitmap fBitmap;
108 SkBitmap fMask;
109
110 typedef GM INHERITED;
111};
112
113//////////////////////////////////////////////////////////////////////////////
114
115static GM* MyFactory(void*) { return new BitmapShaderGM; }
116static GMRegistry reg(MyFactory);
117
118}