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- /*
- * Copyright 2011 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "include/core/SkCanvas.h"
- #include "include/core/SkSurface.h"
- #include "include/effects/SkBlurMaskFilter.h"
- #include "samplecode/Sample.h"
- #include "src/core/SkBlurMask.h"
- static SkBitmap make_bitmap() {
- SkBitmap bm;
- bm.allocN32Pixels(5, 5);
- for (int y = 0; y < bm.height(); y++) {
- uint32_t* p = bm.getAddr32(0, y);
- for (int x = 0; x < bm.width(); x++) {
- p[x] = ((x + y) & 1) ? SK_ColorWHITE : SK_ColorBLACK;
- }
- }
- return bm;
- }
- class TextureDomainView : public Sample {
- SkBitmap fBM;
- public:
- TextureDomainView(){
- fBM = make_bitmap();
- }
- protected:
- virtual SkString name() { return SkString("Texture Domain"); }
- virtual void onDrawContent(SkCanvas* canvas) {
- SkRect srcRect;
- SkRect dstRect;
- SkPaint paint;
- paint.setFilterQuality(kLow_SkFilterQuality);
- // Test that bitmap draws from malloc-backed bitmaps respect
- // the constrained texture domain.
- srcRect.setXYWH(1, 1, 3, 3);
- dstRect.setXYWH(5, 5, 305, 305);
- canvas->drawBitmapRect(fBM, srcRect, dstRect, &paint, SkCanvas::kStrict_SrcRectConstraint);
- // Test that bitmap draws across separate devices also respect
- // the constrainted texture domain.
- // Note: GPU-backed bitmaps follow a different rendering path
- // when copying from one GPU device to another.
- SkImageInfo info = SkImageInfo::MakeN32(5, 5, kOpaque_SkAlphaType);
- auto surface(canvas->makeSurface(info));
- srcRect.setXYWH(1, 1, 3, 3);
- dstRect.setXYWH(1, 1, 3, 3);
- surface->getCanvas()->drawBitmapRect(fBM, srcRect, dstRect, &paint,
- SkCanvas::kStrict_SrcRectConstraint);
- sk_sp<SkImage> image(surface->makeImageSnapshot());
- srcRect.setXYWH(1, 1, 3, 3);
- dstRect.setXYWH(405, 5, 305, 305);
- canvas->drawImageRect(image, srcRect, dstRect, &paint);
- // Test that bitmap blurring using a subrect
- // renders correctly
- srcRect.setXYWH(1, 1, 3, 3);
- dstRect.setXYWH(5, 405, 305, 305);
- paint.setMaskFilter(SkMaskFilter::MakeBlur(
- kNormal_SkBlurStyle, SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(5)), false));
- canvas->drawImageRect(image, srcRect, dstRect, &paint);
- // Blur and a rotation + nullptr src rect
- // This should not trigger the texture domain code
- // but it will test a code path in SkGpuDevice::drawBitmap
- // that handles blurs with rects transformed to non-
- // orthogonal rects. It also tests the nullptr src rect handling
- paint.setMaskFilter(SkMaskFilter::MakeBlur(kNormal_SkBlurStyle,
- SkBlurMask::ConvertRadiusToSigma(5)));
- dstRect.setXYWH(-150, -150, 300, 300);
- canvas->translate(550, 550);
- canvas->rotate(45);
- canvas->drawBitmapRect(fBM, dstRect, &paint);
- }
- private:
- typedef Sample INHERITED;
- };
- //////////////////////////////////////////////////////////////////////////////
- DEF_SAMPLE( return new TextureDomainView(); )
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