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- /*
- * Copyright 2011 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "gm/gm.h"
- #include "include/core/SkBitmap.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColor.h"
- #include "include/core/SkFilterQuality.h"
- #include "include/core/SkFont.h"
- #include "include/core/SkImageInfo.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkScalar.h"
- #include "include/core/SkSize.h"
- #include "include/core/SkString.h"
- #include "include/core/SkTypeface.h"
- #include "include/core/SkTypes.h"
- #include "tools/ToolUtils.h"
- static void make_bm(SkBitmap* bm) {
- const SkColor colors[4] = {
- SK_ColorRED, SK_ColorGREEN,
- SK_ColorBLUE, SK_ColorWHITE
- };
- SkPMColor colorsPM[4];
- for (size_t i = 0; i < SK_ARRAY_COUNT(colors); ++i) {
- colorsPM[i] = SkPreMultiplyColor(colors[i]);
- }
- bm->allocN32Pixels(2, 2, true);
- *bm->getAddr32(0, 0) = colorsPM[0];
- *bm->getAddr32(1, 0) = colorsPM[1];
- *bm->getAddr32(0, 1) = colorsPM[2];
- *bm->getAddr32(1, 1) = colorsPM[3];
- }
- static SkScalar draw_bm(SkCanvas* canvas, const SkBitmap& bm,
- SkScalar x, SkScalar y, SkPaint* paint) {
- canvas->drawBitmap(bm, x, y, paint);
- return SkIntToScalar(bm.width()) * 5/4;
- }
- static SkScalar draw_set(SkCanvas* c, const SkBitmap& bm, SkScalar x,
- SkPaint* p) {
- x += draw_bm(c, bm, x, 0, p);
- p->setFilterQuality(kLow_SkFilterQuality);
- x += draw_bm(c, bm, x, 0, p);
- p->setDither(true);
- return x + draw_bm(c, bm, x, 0, p);
- }
- static SkScalar draw_row(SkCanvas* canvas, const SkBitmap& bm) {
- SkAutoCanvasRestore acr(canvas, true);
- SkPaint paint;
- paint.setAntiAlias(true);
- SkScalar x = 0;
- const int scale = 32;
- SkFont font(ToolUtils::create_portable_typeface());
- const char* name = ToolUtils::colortype_name(bm.colorType());
- canvas->drawString(name, x, SkIntToScalar(bm.height())*scale*5/8,
- font, paint);
- canvas->translate(SkIntToScalar(48), 0);
- canvas->scale(SkIntToScalar(scale), SkIntToScalar(scale));
- x += draw_set(canvas, bm, 0, &paint);
- paint.reset();
- paint.setAlphaf(0.5f);
- draw_set(canvas, bm, x, &paint);
- return x * scale / 3;
- }
- class FilterGM : public skiagm::GM {
- void onOnceBeforeDraw() override {
- make_bm(&fBM32);
- ToolUtils::copy_to(&fBM4444, kARGB_4444_SkColorType, fBM32);
- ToolUtils::copy_to(&fBM16, kRGB_565_SkColorType, fBM32);
- }
- public:
- SkBitmap fBM4444, fBM16, fBM32;
- FilterGM() {
- this->setBGColor(0xFFDDDDDD);
- }
- protected:
- SkString onShortName() override {
- return SkString("bitmapfilters");
- }
- SkISize onISize() override {
- return SkISize::Make(540, 250);
- }
- void onDraw(SkCanvas* canvas) override {
- SkScalar x = SkIntToScalar(10);
- SkScalar y = SkIntToScalar(10);
- canvas->translate(x, y);
- y = draw_row(canvas, fBM4444);
- canvas->translate(0, y);
- y = draw_row(canvas, fBM16);
- canvas->translate(0, y);
- draw_row(canvas, fBM32);
- }
- private:
- typedef skiagm::GM INHERITED;
- };
- DEF_GM( return new FilterGM; )
- //////////////////////////////////////////////////////////////////////////////
- class TestExtractAlphaGM : public skiagm::GM {
- void onOnceBeforeDraw() override {
- // Make a bitmap with per-pixels alpha (stroked circle)
- fBitmap.allocN32Pixels(100, 100);
- SkCanvas canvas(fBitmap);
- canvas.clear(0);
- SkPaint paint;
- paint.setAntiAlias(true);
- paint.setColor(SK_ColorBLUE);
- paint.setStyle(SkPaint::kStroke_Style);
- paint.setStrokeWidth(20);
- canvas.drawCircle(50, 50, 39, paint);
- fBitmap.extractAlpha(&fAlpha);
- }
- public:
- SkBitmap fBitmap, fAlpha;
- protected:
- SkString onShortName() override {
- return SkString("extractalpha");
- }
- SkISize onISize() override {
- return SkISize::Make(540, 330);
- }
- void onDraw(SkCanvas* canvas) override {
- SkPaint paint;
- paint.setAntiAlias(true);
- paint.setFilterQuality(kLow_SkFilterQuality);
- paint.setColor(SK_ColorRED);
- canvas->drawBitmap(fBitmap, 10, 10, &paint); // should stay blue (ignore paint's color)
- canvas->drawBitmap(fAlpha, 120, 10, &paint); // should draw red
- }
- private:
- typedef skiagm::GM INHERITED;
- };
- DEF_GM( return new TestExtractAlphaGM; )
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