зеркало из https://github.com/mozilla/moz-skia.git
149 строки
4.1 KiB
C++
149 строки
4.1 KiB
C++
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/*
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* Copyright 2011 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 "SampleCode.h"
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#include "SkColorPriv.h"
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#include "SkGradientShader.h"
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#include "SkView.h"
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#include "SkCanvas.h"
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#include "SkUtils.h"
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static void draw_rect(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
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canvas->drawRect(r, p);
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SkPaint frame(p);
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frame.setShader(NULL);
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frame.setStyle(SkPaint::kStroke_Style);
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canvas->drawRect(r, frame);
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}
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static void draw_gradient(SkCanvas* canvas) {
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SkRect r = { 0, 0, SkIntToScalar(256), SkIntToScalar(32) };
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SkPoint pts[] = { { r.fLeft, r.fTop }, { r.fRight, r.fTop } };
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SkColor colors[] = { 0xFF000000, 0xFFFF0000 };
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SkShader* s = SkGradientShader::CreateLinear(pts, colors, NULL, 2,
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SkShader::kClamp_TileMode);
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SkPaint p;
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p.setShader(s)->unref();
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draw_rect(canvas, r, p);
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canvas->translate(0, SkIntToScalar(40));
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p.setDither(true);
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draw_rect(canvas, r, p);
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}
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static void test_pathregion() {
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SkPath path;
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SkRegion region;
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path.moveTo(25071800.f, -141823808.f);
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path.lineTo(25075500.f, -141824000.f);
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path.lineTo(25075400.f, -141827712.f);
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path.lineTo(25071810.f, -141827600.f);
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path.close();
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SkIRect bounds;
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path.getBounds().round(&bounds);
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SkRegion clip(bounds);
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bool result = region.setPath(path, clip); // <-- !! DOWN !!
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SkDebugf("----- result %d\n", result);
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}
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static SkBitmap make_bitmap() {
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SkBitmap bm;
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SkColorTable* ctable = new SkColorTable(256);
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SkPMColor* c = ctable->lockColors();
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for (int i = 0; i < 256; i++) {
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c[i] = SkPackARGB32(0xFF, i, 0, 0);
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}
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ctable->unlockColors(true);
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bm.setConfig(SkBitmap::kIndex8_Config, 256, 32);
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bm.allocPixels(ctable);
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ctable->unref();
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bm.lockPixels();
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for (int y = 0; y < bm.height(); y++) {
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uint8_t* p = bm.getAddr8(0, y);
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for (int x = 0; x < 256; x++) {
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p[x] = x;
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}
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}
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bm.unlockPixels();
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return bm;
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}
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class DitherBitmapView : public SampleView {
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SkBitmap fBM8;
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SkBitmap fBM32;
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public:
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DitherBitmapView() {
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test_pathregion();
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fBM8 = make_bitmap();
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fBM8.copyTo(&fBM32, SkBitmap::kARGB_8888_Config);
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this->setBGColor(0xFFDDDDDD);
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}
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protected:
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// overrides from SkEventSink
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virtual bool onQuery(SkEvent* evt) {
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if (SampleCode::TitleQ(*evt)) {
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SampleCode::TitleR(evt, "DitherBitmap");
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return true;
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}
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return this->INHERITED::onQuery(evt);
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}
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static void setBitmapOpaque(SkBitmap* bm, bool isOpaque) {
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SkAutoLockPixels alp(*bm); // needed for ctable
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bm->setIsOpaque(isOpaque);
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SkColorTable* ctable = bm->getColorTable();
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if (ctable) {
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ctable->setIsOpaque(isOpaque);
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}
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}
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static void draw2(SkCanvas* canvas, const SkBitmap& bm) {
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SkPaint paint;
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SkBitmap bitmap(bm);
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setBitmapOpaque(&bitmap, false);
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paint.setDither(false);
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canvas->drawBitmap(bitmap, 0, 0, &paint);
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paint.setDither(true);
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canvas->drawBitmap(bitmap, 0, SkIntToScalar(bm.height() + 10), &paint);
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setBitmapOpaque(&bitmap, true);
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SkScalar x = SkIntToScalar(bm.width() + 10);
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paint.setDither(false);
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canvas->drawBitmap(bitmap, x, 0, &paint);
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paint.setDither(true);
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canvas->drawBitmap(bitmap, x, SkIntToScalar(bm.height() + 10), &paint);
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}
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virtual void onDrawContent(SkCanvas* canvas) {
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canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
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draw2(canvas, fBM8);
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canvas->translate(0, SkIntToScalar(fBM8.height() *3));
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draw2(canvas, fBM32);
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canvas->translate(0, SkIntToScalar(fBM8.height() *3));
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draw_gradient(canvas);
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}
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private:
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typedef SampleView INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static SkView* MyFactory() { return new DitherBitmapView; }
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static SkViewRegister reg(MyFactory);
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