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Unified Diff: gm/scalebitmap.cpp

Issue 17381008: More general version of image filtering; reworked to be robust and easier to SSE (Closed) Base URL: https://skia.googlecode.com/svn/trunk
Patch Set: make temp. scale function private; disable GM and bench for that function Created 7 years, 5 months ago
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Index: gm/scalebitmap.cpp
diff --git a/gm/scalebitmap.cpp b/gm/scalebitmap.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..5d08ba85de299bf499b611d07053eda3c8c06b3a
--- /dev/null
+++ b/gm/scalebitmap.cpp
@@ -0,0 +1,114 @@
+/*
+ * 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 "SkImageDecoder.h"
+#include "SkStream.h"
+
+class ScaleBitmapGM : public skiagm::GM {
+
+public:
+
+ ScaleBitmapGM(const char filename[], float scale)
+ : fFilename(filename), fScale(scale)
+ {
+ this->setBGColor(0xFFDDDDDD);
+ fName.printf("scalebitmap_%s_%f", filename, scale);
+
+ SkString path(skiagm::GM::gResourcePath);
+ path.append("/");
+ path.append(fFilename);
+
+ SkImageDecoder *codec = NULL;
+ SkFILEStream stream(path.c_str());
+ if (stream.isValid()) {
+ codec = SkImageDecoder::Factory(&stream);
+ }
+ if (codec) {
+ stream.rewind();
+ codec->decode(&stream, &fBM, SkBitmap::kARGB_8888_Config,
+ SkImageDecoder::kDecodePixels_Mode);
+ SkDELETE(codec);
+ } else {
+ fBM.setConfig(SkBitmap::kARGB_8888_Config, 1, 1);
+ fBM.allocPixels();
+ *(fBM.getAddr32(0,0)) = 0xFF0000FF; // red == bad
+ }
+ fSize = fBM.height();
+ }
+
+protected:
+
+
+ SkBitmap fBM;
+ SkString fName;
+ SkString fFilename;
+ int fSize;
+ float fScale;
+
+
+ virtual SkString onShortName() SK_OVERRIDE {
+ return fName;
+ }
+
+ virtual SkISize onISize() SK_OVERRIDE {
+ return SkISize::Make(fBM.width() * fScale, fBM.height() * fScale);
+ }
+
+ virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+ SkBitmap dst;
+ dst.setConfig(SkBitmap::kARGB_8888_Config, fBM.width() * fScale, fBM.height() * fScale);
+ dst.allocPixels();
+ fBM.scale(&dst);
+
+ canvas->drawBitmap(dst, 0, 0);
+ }
+
+private:
+ typedef skiagm::GM INHERITED;
+};
+
+class ScaleBitmapMipmapGM: public ScaleBitmapGM {
+ SkMatrix fMatrix;
+
+public:
+ ScaleBitmapMipmapGM(const char filename[], float scale)
+ : INHERITED(filename, scale)
+ {
+ fName.printf("scalebitmap_mipmap_%s_%f", filename, scale);
+ fBM.buildMipMap();
+ fMatrix.setScale(scale, scale);
+ }
+protected:
+ virtual void onDraw(SkCanvas *canvas) SK_OVERRIDE {
+ SkPaint paint;
+
+ paint.setFilterBitmap(true);
+ canvas->drawBitmapMatrix(fBM, fMatrix, &paint);
+ }
+private:
+ typedef ScaleBitmapGM INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+DEF_GM( return new ScaleBitmapGM("mandrill_128.png", 2); )
+DEF_GM( return new ScaleBitmapGM("mandrill_64.png", 4); )
+DEF_GM( return new ScaleBitmapGM("mandrill_32.png", 8); )
+DEF_GM( return new ScaleBitmapGM("mandrill_16.png", 16); )
+
+DEF_GM( return new ScaleBitmapGM("nature.jpg", 0.5f); )
+DEF_GM( return new ScaleBitmapGM("nature.jpg", 0.25f); )
+DEF_GM( return new ScaleBitmapGM("nature.jpg", 0.125f); )
+DEF_GM( return new ScaleBitmapGM("nature.jpg", 0.0625f); )
+
+DEF_GM( return new ScaleBitmapMipmapGM("nature.jpg", 0.5f); )
+DEF_GM( return new ScaleBitmapMipmapGM("nature.jpg", 0.25f); )
+DEF_GM( return new ScaleBitmapMipmapGM("nature.jpg", 0.125f); )
+DEF_GM( return new ScaleBitmapMipmapGM("nature.jpg", 0.0625f); )
+
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