aad8b27ec6
For some reason, GM's are now being composited against white in some modes, where the alpha used to be ignored (or composited against black, I'm not sure which). At any rate, it doesn't make much sense to have alpha in the result anyway, so let's clear to opaque black instead of transparent black and avoid the problem. This is a trial balloon for bitmapsource and pictureimagefilter. If all goes well, I'll make this change more widely. R=scroggo BUG=skia:3319 Review URL: https://codereview.chromium.org/1074513002
91 lines
3.0 KiB
C++
91 lines
3.0 KiB
C++
/*
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* Copyright 2013 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "SkBitmapSource.h"
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// This GM exercises the SkBitmapSource ImageFilter class.
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class BitmapSourceGM : public skiagm::GM {
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public:
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BitmapSourceGM() {
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}
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protected:
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SkString onShortName() override {
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return SkString("bitmapsource");
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}
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void makeBitmap() {
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fBitmap.allocN32Pixels(100, 100);
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SkCanvas canvas(fBitmap);
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canvas.clear(0x00000000);
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SkPaint paint;
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paint.setAntiAlias(true);
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sk_tool_utils::set_portable_typeface(&paint);
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paint.setColor(0xFFFFFFFF);
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paint.setTextSize(SkIntToScalar(96));
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const char* str = "e";
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canvas.drawText(str, strlen(str), SkIntToScalar(20), SkIntToScalar(70), paint);
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}
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SkISize onISize() override { return SkISize::Make(500, 150); }
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void onOnceBeforeDraw() override {
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this->makeBitmap();
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}
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static void fillRectFiltered(SkCanvas* canvas, const SkRect& clipRect, SkImageFilter* filter) {
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SkPaint paint;
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paint.setImageFilter(filter);
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canvas->save();
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canvas->clipRect(clipRect);
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canvas->drawPaint(paint);
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canvas->restore();
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}
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void onDraw(SkCanvas* canvas) override {
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canvas->clear(SK_ColorBLACK);
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{
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SkRect srcRect = SkRect::MakeXYWH(20, 20, 30, 30);
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SkRect dstRect = SkRect::MakeXYWH(0, 10, 60, 60);
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SkRect clipRect = SkRect::MakeXYWH(0, 0, 100, 100);
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SkRect bounds;
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fBitmap.getBounds(&bounds);
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SkAutoTUnref<SkImageFilter> bitmapSource(SkBitmapSource::Create(fBitmap));
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SkAutoTUnref<SkImageFilter> bitmapSourceSrcRect(SkBitmapSource::Create(fBitmap, srcRect, srcRect));
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SkAutoTUnref<SkImageFilter> bitmapSourceSrcRectDstRect(SkBitmapSource::Create(fBitmap, srcRect, dstRect));
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SkAutoTUnref<SkImageFilter> bitmapSourceDstRectOnly(SkBitmapSource::Create(fBitmap, bounds, dstRect));
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// Draw an unscaled bitmap.
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fillRectFiltered(canvas, clipRect, bitmapSource);
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canvas->translate(SkIntToScalar(100), 0);
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// Draw an unscaled subset of the source bitmap (srcRect -> srcRect).
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fillRectFiltered(canvas, clipRect, bitmapSourceSrcRect);
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canvas->translate(SkIntToScalar(100), 0);
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// Draw a subset of the bitmap scaled to a destination rect (srcRect -> dstRect).
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fillRectFiltered(canvas, clipRect, bitmapSourceSrcRectDstRect);
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canvas->translate(SkIntToScalar(100), 0);
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// Draw the entire bitmap scaled to a destination rect (bounds -> dstRect).
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fillRectFiltered(canvas, clipRect, bitmapSourceDstRectOnly);
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canvas->translate(SkIntToScalar(100), 0);
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}
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}
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private:
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SkBitmap fBitmap;
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typedef GM INHERITED;
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};
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///////////////////////////////////////////////////////////////////////////////
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DEF_GM( return new BitmapSourceGM; )
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