зеркало из https://github.com/mozilla/moz-skia.git
139 строки
3.7 KiB
C++
139 строки
3.7 KiB
C++
#include "SampleCode.h"
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#include "SkView.h"
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#include "SkCanvas.h"
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#include "SkGradientShader.h"
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#include "SkPath.h"
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#include "SkRegion.h"
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#include "SkShader.h"
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#include "SkUtils.h"
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#include "Sk1DPathEffect.h"
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#include "SkCornerPathEffect.h"
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#include "SkPathMeasure.h"
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#include "SkRandom.h"
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#include "SkColorPriv.h"
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#include "SkColorFilter.h"
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#include "SkDither.h"
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static void make_bm(SkBitmap* bm) {
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const SkColor colors[] = {
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SK_ColorRED, SK_ColorGREEN,
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SK_ColorBLUE, SK_ColorWHITE
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};
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SkColorTable* ctable = new SkColorTable(colors, 4);
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bm->setConfig(SkBitmap::kIndex8_Config, 2, 2);
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bm->allocPixels(ctable);
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ctable->unref();
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*bm->getAddr8(0, 0) = 0;
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*bm->getAddr8(1, 0) = 1;
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*bm->getAddr8(0, 1) = 2;
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*bm->getAddr8(1, 1) = 3;
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}
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static SkScalar draw_bm(SkCanvas* canvas, const SkBitmap& bm,
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SkScalar x, SkScalar y, SkPaint* paint) {
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#if 1
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canvas->drawBitmap(bm, x, y, paint);
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return SkIntToScalar(bm.width()) * 5/4;
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#else
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SkAutoCanvasRestore acr(canvas, true);
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canvas->translate(x, y);
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SkScalar w = SkIntToScalar(bm.width());
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SkScalar h = SkIntToScalar(bm.height());
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SkShader* s = SkShader::CreateBitmapShader(bm, SkShader::kRepeat_TileMode,
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SkShader::kRepeat_TileMode);
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paint->setShader(s)->unref();
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canvas->drawRect(SkRect::MakeWH(w, h), *paint);
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paint->setShader(NULL);
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return w * 5/4;
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#endif
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}
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static SkScalar draw_set(SkCanvas* c, const SkBitmap& bm, SkScalar x, SkPaint* p) {
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x += draw_bm(c, bm, x, 0, p);
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p->setFilterBitmap(true);
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x += draw_bm(c, bm, x, 0, p);
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p->setDither(true);
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return x + draw_bm(c, bm, x, 0, p);
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}
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static const char* gConfigNames[] = {
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"unknown config",
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"A1",
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"A8",
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"Index8",
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"565",
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"4444",
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"8888"
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};
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static SkScalar draw_row(SkCanvas* canvas, const SkBitmap& bm) {
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SkAutoCanvasRestore acr(canvas, true);
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SkPaint paint;
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SkScalar x = 0;
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const int scale = 32;
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paint.setAntiAlias(true);
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const char* name = gConfigNames[bm.config()];
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canvas->drawText(name, strlen(name), x, SkIntToScalar(bm.height())*scale*5/8,
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paint);
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canvas->translate(SkIntToScalar(48), 0);
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canvas->scale(SkIntToScalar(scale), SkIntToScalar(scale));
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x += draw_set(canvas, bm, 0, &paint);
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paint.reset();
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paint.setAlpha(0x80);
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draw_set(canvas, bm, x, &paint);
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return x * scale / 3;
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}
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class FilterView : public SampleView {
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public:
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SkBitmap fBM8, fBM4444, fBM16, fBM32;
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FilterView() {
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make_bm(&fBM8);
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fBM8.copyTo(&fBM4444, SkBitmap::kARGB_4444_Config);
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fBM8.copyTo(&fBM16, SkBitmap::kRGB_565_Config);
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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, "Filter");
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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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virtual void onDrawContent(SkCanvas* canvas) {
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SkScalar x = SkIntToScalar(10);
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SkScalar y = SkIntToScalar(10);
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canvas->translate(x, y);
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y = draw_row(canvas, fBM8);
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canvas->translate(0, y);
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y = draw_row(canvas, fBM4444);
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canvas->translate(0, y);
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y = draw_row(canvas, fBM16);
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canvas->translate(0, y);
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draw_row(canvas, fBM32);
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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 FilterView; }
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static SkViewRegister reg(MyFactory);
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