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- /*
- * 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/gm.h"
- #include "include/core/SkBitmap.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColor.h"
- #include "include/core/SkImageInfo.h"
- #include "include/core/SkMatrix.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkRect.h"
- #include "include/core/SkShader.h"
- #include "include/core/SkSize.h"
- #include "include/core/SkString.h"
- #include "include/core/SkTileMode.h"
- #include "include/core/SkTypes.h"
- #include "include/gpu/GrContext.h"
- #include "src/gpu/GrCaps.h"
- #include "src/gpu/GrContextPriv.h"
- namespace skiagm {
- static void draw_bm(SkBitmap* bm) {
- SkPaint bluePaint;
- bluePaint.setColor(SK_ColorBLUE);
- bm->allocN32Pixels(20, 20);
- 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->allocPixels(SkImageInfo::MakeA8(20, 20));
- bm->eraseColor(SK_ColorTRANSPARENT);
- SkCanvas canvas(*bm);
- canvas.drawCircle(10, 10, 10, circlePaint);
- }
- class BitmapShaderGM : public GM {
- protected:
- void onOnceBeforeDraw() override {
- this->setBGColor(SK_ColorGRAY);
- draw_bm(&fBitmap);
- draw_mask(&fMask);
- }
- SkString onShortName() override {
- return SkString("bitmapshaders");
- }
- SkISize onISize() override {
- return SkISize::Make(150, 100);
- }
- void onDraw(SkCanvas* canvas) override {
- SkPaint paint;
- for (int i = 0; i < 2; i++) {
- SkMatrix s;
- s.reset();
- if (1 == i) {
- s.setScale(1.5f, 1.5f);
- s.postTranslate(2, 2);
- }
- canvas->save();
- paint.setShader(fBitmap.makeShader(&s));
- // draw the shader with a bitmap mask
- canvas->drawBitmap(fMask, 0, 0, &paint);
- // no blue circle expected (the bitmap shader's coordinates are aligned to CTM still)
- canvas->drawBitmap(fMask, 30, 0, &paint);
- canvas->translate(0, 25);
- canvas->drawCircle(10, 10, 10, paint);
- canvas->drawCircle(40, 10, 10, paint); // no blue circle expected
- canvas->translate(0, 25);
- // clear the shader, colorized by a solid color with a bitmap mask
- paint.setShader(nullptr);
- paint.setColor(SK_ColorGREEN);
- canvas->drawBitmap(fMask, 0, 0, &paint);
- canvas->drawBitmap(fMask, 30, 0, &paint);
- canvas->translate(0, 25);
- paint.setShader(fMask.makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat, &s));
- paint.setColor(SK_ColorRED);
- // 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);
- canvas->restore();
- canvas->translate(60, 0);
- }
- }
- private:
- SkBitmap fBitmap;
- SkBitmap fMask;
- typedef GM INHERITED;
- };
- DEF_SIMPLE_GM(hugebitmapshader, canvas, 100, 100) {
- SkPaint paint;
- SkBitmap bitmap;
- // The huge height will exceed GL_MAX_TEXTURE_SIZE. We test that the GL backend will at least
- // draw something with a default paint instead of drawing nothing.
- //
- // (See https://skia-review.googlesource.com/c/skia/+/73200)
- int bitmapW = 1;
- int bitmapH = 60000;
- if (auto* ctx = canvas->getGrContext()) {
- bitmapH = ctx->priv().caps()->maxTextureSize() + 1;
- }
- bitmap.setInfo(SkImageInfo::MakeA8(bitmapW, bitmapH), bitmapW);
- uint8_t* pixels = new uint8_t[bitmapH];
- for(int i = 0; i < bitmapH; ++i) {
- pixels[i] = i & 0xff;
- }
- bitmap.setPixels(pixels);
- paint.setShader(bitmap.makeShader(SkTileMode::kMirror, SkTileMode::kMirror));
- paint.setColor(SK_ColorRED);
- paint.setAntiAlias(true);
- canvas->drawCircle(50, 50, 50, paint);
- delete [] pixels;
- }
- //////////////////////////////////////////////////////////////////////////////
- DEF_GM( return new BitmapShaderGM; )
- }
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