diff options
Diffstat (limited to 'chromium/third_party/skia/gm/downsamplebitmap.cpp')
| -rw-r--r-- | chromium/third_party/skia/gm/downsamplebitmap.cpp | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/chromium/third_party/skia/gm/downsamplebitmap.cpp b/chromium/third_party/skia/gm/downsamplebitmap.cpp new file mode 100644 index 00000000000..a911b83b9fb --- /dev/null +++ b/chromium/third_party/skia/gm/downsamplebitmap.cpp @@ -0,0 +1,214 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "gm.h" + +#include "Resources.h" +#include "SkGradientShader.h" +#include "SkTypeface.h" +#include "SkImageDecoder.h" +#include "SkStream.h" +#include "SkPaint.h" + +static void setTypeface(SkPaint* paint, const char name[], SkTypeface::Style style) { + SkSafeUnref(paint->setTypeface(SkTypeface::CreateFromName(name, style))); +} + +class DownsampleBitmapGM : public skiagm::GM { +public: + SkBitmap fBM; + SkString fName; + bool fBitmapMade; + SkPaint::FilterLevel fFilterLevel; + + DownsampleBitmapGM(SkPaint::FilterLevel filterLevel) + : fFilterLevel(filterLevel) + { + this->setBGColor(0xFFDDDDDD); + fBitmapMade = false; + } + + const char* filterLevelToString() { + static const char *filterLevelNames[] = { + "none", "low", "medium", "high" + }; + return filterLevelNames[fFilterLevel]; + } + +protected: + virtual uint32_t onGetFlags() const SK_OVERRIDE { + if (SkPaint::kHigh_FilterLevel != fFilterLevel) { + return kSkipTiled_Flag; + } + return 0; + } + + virtual SkString onShortName() SK_OVERRIDE { + return fName; + } + + virtual SkISize onISize() SK_OVERRIDE { + make_bitmap_wrapper(); + return SkISize::Make(4 * fBM.width(), fBM.height()); + } + + void make_bitmap_wrapper() { + if (!fBitmapMade) { + fBitmapMade = true; + make_bitmap(); + } + } + + virtual void make_bitmap() = 0; + + virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { + make_bitmap_wrapper(); + + int curX = 0; + int curWidth; + float curScale = 1; + do { + + SkMatrix matrix; + matrix.setScale( curScale, curScale ); + + SkPaint paint; + paint.setFilterLevel(fFilterLevel); + + canvas->save(); + canvas->translate( (SkScalar) curX, 0.f ); + canvas->drawBitmapMatrix( fBM, matrix, &paint ); + canvas->restore(); + + curWidth = (int) (fBM.width() * curScale + 2); + curX += curWidth; + curScale *= 0.75f; + } while (curWidth >= 2 && curX < 4*fBM.width()); + } + +private: + typedef skiagm::GM INHERITED; +}; + +class DownsampleBitmapTextGM: public DownsampleBitmapGM { + public: + DownsampleBitmapTextGM(float textSize, SkPaint::FilterLevel filterLevel) + : INHERITED(filterLevel), fTextSize(textSize) + { + fName.printf("downsamplebitmap_text_%s_%.2fpt", this->filterLevelToString(), fTextSize); + } + + protected: + float fTextSize; + + virtual void make_bitmap() SK_OVERRIDE { + fBM.allocN32Pixels(int(fTextSize * 8), int(fTextSize * 6)); + SkCanvas canvas(fBM); + canvas.drawColor(SK_ColorWHITE); + + SkPaint paint; + paint.setAntiAlias(true); + paint.setSubpixelText(true); + paint.setTextSize(fTextSize); + + setTypeface(&paint, "Times", SkTypeface::kNormal); + canvas.drawText("Hamburgefons", 12, fTextSize/2, 1.2f*fTextSize, paint); + setTypeface(&paint, "Times", SkTypeface::kBold); + canvas.drawText("Hamburgefons", 12, fTextSize/2, 2.4f*fTextSize, paint); + setTypeface(&paint, "Times", SkTypeface::kItalic); + canvas.drawText("Hamburgefons", 12, fTextSize/2, 3.6f*fTextSize, paint); + setTypeface(&paint, "Times", SkTypeface::kBoldItalic); + canvas.drawText("Hamburgefons", 12, fTextSize/2, 4.8f*fTextSize, paint); + } + private: + typedef DownsampleBitmapGM INHERITED; +}; + +class DownsampleBitmapCheckerboardGM: public DownsampleBitmapGM { + public: + DownsampleBitmapCheckerboardGM(int size, int numChecks, SkPaint::FilterLevel filterLevel) + : INHERITED(filterLevel), fSize(size), fNumChecks(numChecks) + { + fName.printf("downsamplebitmap_checkerboard_%s_%d_%d", this->filterLevelToString(), fSize, fNumChecks); + } + + protected: + int fSize; + int fNumChecks; + + virtual void make_bitmap() SK_OVERRIDE { + fBM.allocN32Pixels(fSize, fSize); + for (int y = 0; y < fSize; ++y) { + for (int x = 0; x < fSize; ++x) { + SkPMColor* s = fBM.getAddr32(x, y); + int cx = (x * fNumChecks) / fSize; + int cy = (y * fNumChecks) / fSize; + if ((cx+cy)%2) { + *s = 0xFFFFFFFF; + } else { + *s = 0xFF000000; + } + } + } + } + private: + typedef DownsampleBitmapGM INHERITED; +}; + +class DownsampleBitmapImageGM: public DownsampleBitmapGM { + public: + DownsampleBitmapImageGM(const char filename[], SkPaint::FilterLevel filterLevel) + : INHERITED(filterLevel), fFilename(filename) + { + fName.printf("downsamplebitmap_image_%s_%s", this->filterLevelToString(), filename); + } + + protected: + SkString fFilename; + int fSize; + + virtual void make_bitmap() SK_OVERRIDE { + SkString resourcePath = GetResourcePath(); + resourcePath.append("/"); + resourcePath.append(fFilename); + + SkImageDecoder* codec = NULL; + SkFILEStream stream(resourcePath.c_str()); + if (stream.isValid()) { + codec = SkImageDecoder::Factory(&stream); + } + if (codec) { + stream.rewind(); + codec->decode(&stream, &fBM, kN32_SkColorType, SkImageDecoder::kDecodePixels_Mode); + SkDELETE(codec); + } else { + fBM.allocN32Pixels(1, 1); + *(fBM.getAddr32(0,0)) = 0xFF0000FF; // red == bad + } + fSize = fBM.height(); + } + private: + typedef DownsampleBitmapGM INHERITED; +}; + +////////////////////////////////////////////////////////////////////////////// + +DEF_GM( return new DownsampleBitmapTextGM(72, SkPaint::kHigh_FilterLevel); ) +DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, SkPaint::kHigh_FilterLevel); ) +DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", SkPaint::kHigh_FilterLevel); ) + +DEF_GM( return new DownsampleBitmapTextGM(72, SkPaint::kMedium_FilterLevel); ) +DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, SkPaint::kMedium_FilterLevel); ) +DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", SkPaint::kMedium_FilterLevel); ) + +DEF_GM( return new DownsampleBitmapTextGM(72, SkPaint::kLow_FilterLevel); ) +DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, SkPaint::kLow_FilterLevel); ) +DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", SkPaint::kLow_FilterLevel); ) + +DEF_GM( return new DownsampleBitmapTextGM(72, SkPaint::kNone_FilterLevel); ) +DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, SkPaint::kNone_FilterLevel); ) +DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", SkPaint::kNone_FilterLevel); ) |