/* * 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 "include/core/SkCanvas.h" #include "include/core/SkFont.h" #include "include/core/SkString.h" #include "include/utils/SkTextUtils.h" #include "samplecode/DecodeFile.h" #include "samplecode/Sample.h" #include "tools/Resources.h" #include static const char* gNames[] = { "images/mandrill_512_q075.jpg", "images/dog.jpg", }; struct Filter2View : public Sample { std::vector fBitmaps; void onOnceBeforeDraw() override { SkASSERT(fBitmaps.empty()); fBitmaps.reserve(SK_ARRAY_COUNT(gNames) * 2); for (const char* name : gNames) { SkBitmap bitmap; (void)decode_file(GetResourceAsData(name), &bitmap); fBitmaps.push_back(std::move(bitmap)); } for (const char* name : gNames) { SkBitmap bitmap; (void)decode_file(GetResourceAsData(name), &bitmap, kRGB_565_SkColorType); fBitmaps.push_back(std::move(bitmap)); } this->setBGColor(SK_ColorGRAY); } SkString name() override { return SkString("Filter/Dither"); } void onDrawContent(SkCanvas* canvas) override { canvas->translate(SkIntToScalar(10), SkIntToScalar(50)); const SkScalar W = SkIntToScalar(fBitmaps[0].width() + 1); const SkScalar H = SkIntToScalar(fBitmaps[0].height() + 1); SkPaint paint; const SkScalar scale = 0.897917f; canvas->scale(SK_Scalar1, scale); for (int k = 0; k < 2; k++) { paint.setFilterQuality(k == 1 ? kLow_SkFilterQuality : kNone_SkFilterQuality); for (int j = 0; j < 2; j++) { paint.setDither(j == 1); for (int i = 0; i < (int)fBitmaps.size(); i++) { SkScalar x = (k * (int)fBitmaps.size() + j) * W; SkScalar y = i * H; x = SkScalarRoundToScalar(x); y = SkScalarRoundToScalar(y); canvas->drawBitmap(fBitmaps[i], x, y, &paint); SkFont font; font.setSize(SkIntToScalar(18)); if (i == 0) { SkString s("dither="); s.appendS32(paint.isDither()); s.append(" filter="); s.appendS32(paint.getFilterQuality() != kNone_SkFilterQuality); SkTextUtils::DrawString(canvas, s.c_str(), x + W/2, y - font.getSize(), font, SkPaint(), SkTextUtils::kCenter_Align); } if (k+j == 2) { SkString s; s.append(" depth="); s.appendS32(fBitmaps[i].colorType() == kRGB_565_SkColorType ? 16 : 32); SkTextUtils::DrawString(canvas, s.c_str(), x + W + SkIntToScalar(4), y + H/2, font, SkPaint()); } } } } } }; DEF_SAMPLE( return new Filter2View(); )