зеркало из https://github.com/mozilla/moz-skia.git
133 строки
4.5 KiB
C++
133 строки
4.5 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 "SkOffsetImageFilter.h"
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#include "SkBitmapSource.h"
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#define WIDTH 600
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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 OffsetImageFilterGM : public GM {
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public:
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OffsetImageFilterGM() : 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("offsetimagefilter");
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}
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void make_bitmap() {
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fBitmap.allocN32Pixels(80, 80);
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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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paint.setColor(0xD000D000);
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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(15), SkIntToScalar(65), paint);
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}
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void make_checkerboard() {
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fCheckerboard.allocN32Pixels(80, 80);
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SkCanvas canvas(fCheckerboard);
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canvas.clear(0x00000000);
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SkPaint darkPaint;
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darkPaint.setColor(0xFF404040);
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SkPaint lightPaint;
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lightPaint.setColor(0xFFA0A0A0);
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for (int y = 0; y < 80; y += 16) {
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for (int x = 0; x < 80; x += 16) {
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canvas.save();
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canvas.translate(SkIntToScalar(x), SkIntToScalar(y));
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canvas.drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint);
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canvas.drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint);
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canvas.drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint);
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canvas.drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint);
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canvas.restore();
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}
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}
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}
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virtual SkISize onISize() {
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return make_isize(WIDTH, HEIGHT);
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}
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void drawClippedBitmap(SkCanvas* canvas, const SkBitmap& bitmap, const SkPaint& paint, SkScalar scale, const SkIRect& cropRect) {
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canvas->save();
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SkRect clipRect = SkRect::MakeWH(
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SkIntToScalar(bitmap.width()), SkIntToScalar(bitmap.height()));
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canvas->clipRect(clipRect);
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canvas->scale(scale, scale);
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canvas->drawBitmap(bitmap, 0, 0, &paint);
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canvas->restore();
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SkPaint strokePaint;
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strokePaint.setStyle(SkPaint::kStroke_Style);
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strokePaint.setColor(SK_ColorRED);
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// Draw a boundary rect around the intersection of the clip rect
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// and crop rect.
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SkMatrix scaleMatrix;
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scaleMatrix.setScale(scale, scale);
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SkRect cropRectFloat;
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scaleMatrix.mapRect(&cropRectFloat, SkRect::Make(cropRect));
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clipRect.intersect(cropRectFloat);
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canvas->drawRect(clipRect, strokePaint);
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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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make_checkerboard();
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fInitialized = true;
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}
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canvas->clear(0x00000000);
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SkPaint paint;
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for (int i = 0; i < 4; i++) {
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SkBitmap* bitmap = (i & 0x01) ? &fCheckerboard : &fBitmap;
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SkIRect cropRect = SkIRect::MakeXYWH(i * 12,
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i * 8,
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bitmap->width() - i * 8,
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bitmap->height() - i * 12);
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SkImageFilter::CropRect rect(SkRect::Make(cropRect));
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SkAutoTUnref<SkImageFilter> tileInput(SkBitmapSource::Create(*bitmap));
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SkScalar dx = SkIntToScalar(i*5);
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SkScalar dy = SkIntToScalar(i*10);
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SkAutoTUnref<SkImageFilter> filter(
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SkOffsetImageFilter::Create(dx, dy, tileInput, &rect));
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paint.setImageFilter(filter);
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drawClippedBitmap(canvas, *bitmap, paint, SK_Scalar1, cropRect);
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canvas->translate(SkIntToScalar(bitmap->width() + MARGIN), 0);
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}
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SkIRect cropRect = SkIRect::MakeXYWH(0, 0, 100, 100);
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SkImageFilter::CropRect rect(SkRect::Make(cropRect));
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SkAutoTUnref<SkImageFilter> filter(
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SkOffsetImageFilter::Create(SkIntToScalar(-5), SkIntToScalar(-10), NULL, &rect));
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paint.setImageFilter(filter);
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drawClippedBitmap(canvas, fBitmap, paint, SkIntToScalar(2), cropRect);
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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 OffsetImageFilterGM; }
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static GMRegistry reg(MyFactory);
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}
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