skia2/bench/ImageDecodeBench.cpp
scroggo@google.com 2bbc2c945b Add an option to create unpremultiplied bitmaps.
Currently they cannot be used directly by Skia, but
the pixels can be used elsewhere.

SkImageDecoder:
Add functions to require unpremultiplied output
and query the presence of the requirement

SkImageDecoder_libpng:
SkImageDecoder_libwebp:
SkImageDecoder_WIC:
Respect the requirement for unpremultiplied output.
TODO: Fix SkImageDecoder_CG.

SkScaledBitmapSampler:
Add procs to skip premultiplication and a boolean
parameter to use those procs.

ImageDecodingTest:
Test unpremultiplied bitmap decoding.

SampleUnpremul:
Add a sample which allows visually comparing between the
unpremultiplied version (copied into a premultiplied bitmap,
since drawing unpremultiplied is not currently supported)
and a premultiplied version of image files.

gm.h:
Add a getter for the resource path, so Samples can use it.

As of patch set 13, https://codereview.chromium.org/16816016/
and https://codereview.chromium.org/16983004/, which were
approved separately.

R=reed@google.com

Review URL: https://codereview.chromium.org/16410009

git-svn-id: http://skia.googlecode.com/svn/trunk@9612 2bbb7eff-a529-9590-31e7-b0007b416f81
2013-06-14 15:33:20 +00:00

92 lines
2.5 KiB
C++

/*
* 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 "SkBenchmark.h"
#include "SkBitmap.h"
#include "SkData.h"
#include "SkForceLinking.h"
#include "SkImageDecoder.h"
#include "SkOSFile.h"
#include "SkStream.h"
#include "SkString.h"
__SK_FORCE_IMAGE_DECODER_LINKING;
class SkCanvas;
class ImageDecodeBench : public SkBenchmark {
public:
ImageDecodeBench(void* p, const char* filename)
: INHERITED(p)
, fName("image_decode_")
, fFilename(filename)
, fStream()
, fValid(false) {
fName.append(SkOSPath::SkBasename(filename));
fIsRendering = false;
}
protected:
virtual const char* onGetName() SK_OVERRIDE {
return fName.c_str();
}
virtual void onPreDraw() SK_OVERRIDE {
SkFILEStream fileStream(fFilename.c_str());
fValid = fileStream.isValid() && fileStream.getLength() > 0;
if (fValid) {
const size_t size = fileStream.getLength();
void* data = sk_malloc_throw(size);
if (fileStream.read(data, size) < size) {
fValid = false;
} else {
SkAutoTUnref<SkData> skdata(SkData::NewFromMalloc(data, size));
fStream.setData(skdata.get());
}
}
}
virtual void onDraw(SkCanvas*) SK_OVERRIDE {
#ifdef SK_DEBUG
if (!fValid) {
SkDebugf("stream was invalid: %s\n", fName.c_str());
return;
}
#endif
// Decode a bunch of times
SkBitmap bm;
for (int i = 0; i < SkBENCHLOOP(1000); ++i) {
SkDEBUGCODE(bool success =) SkImageDecoder::DecodeStream(&fStream, &bm);
#ifdef SK_DEBUG
if (!success) {
SkDebugf("failed to decode %s\n", fName.c_str());
return;
}
#endif
SkDEBUGCODE(success =) fStream.rewind();
#ifdef SK_DEBUG
if (!success) {
SkDebugf("failed to rewind %s\n", fName.c_str());
return;
}
#endif
}
}
private:
SkString fName;
const SkString fFilename;
SkMemoryStream fStream;
bool fValid;
typedef SkBenchmark INHERITED;
};
// These are files which call decodePalette
//DEF_BENCH( return SkNEW_ARGS(ImageDecodeBench, (p, "/usr/local/google/home/scroggo/Downloads/images/hal_163x90.png")); )
//DEF_BENCH( return SkNEW_ARGS(ImageDecodeBench, (p, "/usr/local/google/home/scroggo/Downloads/images/box_19_top-left.png")); )