| /* |
| * 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.h" |
| |
| #include "Resources.h" |
| #include "SkBitmapProcState.h" |
| #include "SkBitmapScaler.h" |
| #include "SkGradientShader.h" |
| #include "SkImageDecoder.h" |
| #include "SkImageEncoder.h" |
| #include "SkStream.h" |
| #include "SkTypeface.h" |
| |
| static SkSize computeSize(const SkBitmap& bm, const SkMatrix& mat) { |
| SkRect bounds = SkRect::MakeWH(SkIntToScalar(bm.width()), |
| SkIntToScalar(bm.height())); |
| mat.mapRect(&bounds); |
| return SkSize::Make(bounds.width(), bounds.height()); |
| } |
| |
| static void draw_cell(SkCanvas* canvas, const SkBitmap& bm, const SkMatrix& mat, SkScalar dx, |
| SkFilterQuality lvl) { |
| SkPaint paint; |
| paint.setFilterQuality(lvl); |
| |
| SkAutoCanvasRestore acr(canvas, true); |
| |
| canvas->translate(dx, 0); |
| canvas->concat(mat); |
| canvas->drawBitmap(bm, 0, 0, &paint); |
| } |
| |
| static void draw_row(SkCanvas* canvas, const SkBitmap& bm, const SkMatrix& mat, SkScalar dx) { |
| draw_cell(canvas, bm, mat, 0 * dx, kNone_SkFilterQuality); |
| draw_cell(canvas, bm, mat, 1 * dx, kLow_SkFilterQuality); |
| draw_cell(canvas, bm, mat, 2 * dx, kMedium_SkFilterQuality); |
| draw_cell(canvas, bm, mat, 3 * dx, kHigh_SkFilterQuality); |
| } |
| |
| class FilterIndiaBoxGM : public skiagm::GM { |
| void onOnceBeforeDraw() override { |
| this->makeBitmap(); |
| |
| SkScalar cx = SkScalarHalf(fBM.width()); |
| SkScalar cy = SkScalarHalf(fBM.height()); |
| |
| float vertScale = 30.0f/55.0f; |
| float horizScale = 150.0f/200.0f; |
| |
| fMatrix[0].setScale(horizScale, vertScale); |
| fMatrix[1].setRotate(30, cx, cy); fMatrix[1].postScale(horizScale, vertScale); |
| } |
| |
| public: |
| SkBitmap fBM; |
| SkMatrix fMatrix[2]; |
| SkString fName; |
| |
| FilterIndiaBoxGM() { |
| this->setBGColor(0xFFDDDDDD); |
| } |
| |
| FilterIndiaBoxGM(const char filename[]) : fFilename(filename) { |
| fName.printf("filterindiabox"); |
| } |
| |
| protected: |
| SkString onShortName() override { |
| return fName; |
| } |
| |
| SkISize onISize() override { |
| return SkISize::Make(1024, 768); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| canvas->translate(10, 10); |
| for (size_t i = 0; i < SK_ARRAY_COUNT(fMatrix); ++i) { |
| SkSize size = computeSize(fBM, fMatrix[i]); |
| size.fWidth += 20; |
| size.fHeight += 20; |
| |
| draw_row(canvas, fBM, fMatrix[i], size.fWidth); |
| canvas->translate(0, size.fHeight); |
| } |
| } |
| |
| protected: |
| SkString fFilename; |
| int fSize; |
| |
| SkScalar getScale() { |
| return 192.f/fSize; |
| } |
| |
| void makeBitmap() { |
| SkImageDecoder* codec = NULL; |
| SkString resourcePath = GetResourcePath(fFilename.c_str()); |
| 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 skiagm::GM INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| |
| DEF_GM( return new FilterIndiaBoxGM("box.gif"); ) |