123 lines
4.3 KiB
C++
123 lines
4.3 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 "sk_tool_utils.h"
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#include "SkBitmapSource.h"
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#include "SkColorFilterImageFilter.h"
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#include "SkColorMatrixFilter.h"
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#include "SkTileImageFilter.h"
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#include "gm.h"
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#define WIDTH 400
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#define HEIGHT 100
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#define MARGIN 12
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namespace skiagm {
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class TileImageFilterGM : public GM {
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public:
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TileImageFilterGM() : fInitialized(false) {
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this->setBGColor(0xFF000000);
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}
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protected:
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virtual SkString onShortName() {
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return SkString("tileimagefilter");
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}
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void make_bitmap() {
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fBitmap.allocN32Pixels(50, 50);
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SkCanvas canvas(fBitmap);
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canvas.clear(0xFF000000);
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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(0xD000D000);
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paint.setTextSize(SkIntToScalar(50));
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const char* str = "e";
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canvas.drawText(str, strlen(str), SkIntToScalar(10), SkIntToScalar(45), paint);
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}
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virtual SkISize onISize() {
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return SkISize::Make(WIDTH, HEIGHT);
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}
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virtual void onDraw(SkCanvas* canvas) {
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if (!fInitialized) {
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make_bitmap();
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fCheckerboard.allocN32Pixels(80, 80);
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SkCanvas checkerboardCanvas(fCheckerboard);
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sk_tool_utils::draw_checkerboard(&checkerboardCanvas, 0xFFA0A0A0, 0xFF404040, 8);
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fInitialized = true;
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}
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canvas->clear(0x00000000);
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int x = 0, y = 0;
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for (size_t i = 0; i < 4; i++) {
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SkBitmap* bitmap = (i & 0x01) ? &fCheckerboard : &fBitmap;
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SkRect srcRect = SkRect::MakeXYWH(SkIntToScalar(bitmap->width()/4),
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SkIntToScalar(bitmap->height()/4),
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SkIntToScalar(bitmap->width()/(i+1)),
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SkIntToScalar(bitmap->height()/(i+1)));
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SkRect dstRect = SkRect::MakeXYWH(SkIntToScalar(i * 8),
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SkIntToScalar(i * 4),
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SkIntToScalar(bitmap->width() - i * 12),
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SkIntToScalar(bitmap->height()) - i * 12);
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SkAutoTUnref<SkImageFilter> tileInput(SkBitmapSource::Create(*bitmap));
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SkAutoTUnref<SkImageFilter> filter(
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SkTileImageFilter::Create(srcRect, dstRect, tileInput));
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canvas->save();
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canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
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SkPaint paint;
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paint.setImageFilter(filter);
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canvas->drawBitmap(fBitmap, 0, 0, &paint);
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canvas->restore();
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x += bitmap->width() + MARGIN;
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if (x + bitmap->width() > WIDTH) {
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x = 0;
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y += bitmap->height() + MARGIN;
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}
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}
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SkScalar matrix[20] = { SK_Scalar1, 0, 0, 0, 0,
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0, SK_Scalar1, 0, 0, 0,
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0, 0, SK_Scalar1, 0, 0,
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0, 0, 0, SK_Scalar1, 0 };
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SkRect srcRect = SkRect::MakeWH(SkIntToScalar(fBitmap.width()),
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SkIntToScalar(fBitmap.height()));
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SkRect dstRect = SkRect::MakeWH(SkIntToScalar(fBitmap.width() * 2),
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SkIntToScalar(fBitmap.height() * 2));
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SkAutoTUnref<SkImageFilter> tile(SkTileImageFilter::Create(srcRect, dstRect, NULL));
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SkAutoTUnref<SkColorFilter> cf(SkColorMatrixFilter::Create(matrix));
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SkAutoTUnref<SkImageFilter> cfif(SkColorFilterImageFilter::Create(cf, tile.get()));
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SkPaint paint;
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paint.setImageFilter(cfif);
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canvas->save();
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canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
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canvas->clipRect(dstRect);
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canvas->saveLayer(&dstRect, &paint);
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canvas->drawBitmap(fBitmap, 0, 0);
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canvas->restore();
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canvas->restore();
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}
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private:
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typedef GM INHERITED;
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SkBitmap fBitmap, fCheckerboard;
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bool fInitialized;
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};
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//////////////////////////////////////////////////////////////////////////////
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static GM* MyFactory(void*) { return new TileImageFilterGM; }
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static GMRegistry reg(MyFactory);
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}
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