| |
| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| #include "gm.h" |
| |
| #include "SkBitmap.h" |
| #include "SkPaint.h" |
| #include "SkShader.h" |
| |
| namespace skiagm { |
| |
| static void draw_bm(SkBitmap* bm) { |
| SkPaint bluePaint; |
| bluePaint.setColor(SK_ColorBLUE); |
| |
| bm->setConfig(SkBitmap::kARGB_8888_Config, 20, 20); |
| bm->allocPixels(); |
| bm->eraseColor(SK_ColorRED); |
| |
| SkCanvas canvas(*bm); |
| canvas.drawCircle(10, 10, 5, bluePaint); |
| } |
| |
| static void draw_mask(SkBitmap* bm) { |
| SkPaint circlePaint; |
| circlePaint.setColor(SK_ColorBLACK); |
| |
| bm->setConfig(SkBitmap::kA8_Config, 20, 20); |
| bm->allocPixels(); |
| bm->eraseColor(SK_ColorTRANSPARENT); |
| |
| SkCanvas canvas(*bm); |
| canvas.drawCircle(10, 10, 10, circlePaint); |
| } |
| |
| class BitmapShaderGM : public GM { |
| public: |
| |
| BitmapShaderGM() { |
| this->setBGColor(SK_ColorGRAY); |
| draw_bm(&fBitmap); |
| draw_mask(&fMask); |
| } |
| |
| protected: |
| virtual SkString onShortName() { |
| return SkString("bitmapshaders"); |
| } |
| |
| virtual SkISize onISize() { |
| return make_isize(75, 100); |
| } |
| |
| virtual void onDraw(SkCanvas* canvas) { |
| SkShader* shader = SkShader::CreateBitmapShader(fBitmap, |
| SkShader::kClamp_TileMode, |
| SkShader::kClamp_TileMode); |
| SkPaint paint; |
| paint.setShader(shader); |
| // release the shader ref as the paint now holds a reference |
| shader->unref(); |
| |
| // draw the shader with a bitmap mask |
| canvas->drawBitmap(fMask, 0, 0, &paint); |
| canvas->drawBitmap(fMask, 30, 0, &paint); |
| |
| canvas->translate(0, 25); |
| |
| // draw the shader with standard geometry |
| canvas->drawCircle(10, 10, 10, paint); |
| canvas->drawCircle(40, 10, 10, paint); // no blue circle expected |
| |
| canvas->translate(0, 25); |
| |
| shader = SkShader::CreateBitmapShader(fMask, |
| SkShader::kRepeat_TileMode, |
| SkShader::kRepeat_TileMode); |
| paint.setShader(shader); |
| paint.setColor(SK_ColorRED); |
| shader->unref(); |
| |
| // draw the mask using the shader and a color |
| canvas->drawRect(SkRect::MakeXYWH(0, 0, 20, 20), paint); |
| canvas->drawRect(SkRect::MakeXYWH(30, 0, 20, 20), paint); |
| } |
| |
| private: |
| SkBitmap fBitmap; |
| SkBitmap fMask; |
| |
| typedef GM INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| static GM* MyFactory(void*) { return new BitmapShaderGM; } |
| static GMRegistry reg(MyFactory); |
| |
| } |