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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/**
* Tests for SkBitmapTransformer.h and SkBitmapTransformer.cpp
*/
#include "Test.h"
#include "SkBitmap.h"
#include "SkBitmapTransformer.h"
namespace skiatest {
class BitmapTransformerTestClass : public Test {
public:
static Test* Factory(void*) {return SkNEW(BitmapTransformerTestClass); }
protected:
virtual void onGetName(SkString* name) { name->set("BitmapTransformer"); }
virtual void onRun(Reporter* reporter) {
this->fReporter = reporter;
RunTest();
}
private:
void RunTest() {
SkBitmap bitmap;
SkBitmap::Config supportedConfig = SkBitmap::kARGB_8888_Config;
SkBitmap::Config unsupportedConfig = SkBitmap::kARGB_4444_Config;
SkBitmapTransformer::PixelFormat supportedPixelFormat =
SkBitmapTransformer::kARGB_8888_Premul_PixelFormat;
const int kWidth = 55;
const int kHeight = 333;
// Transformations that we know are unsupported:
{
bitmap.setConfig(unsupportedConfig, kWidth, kHeight);
SkBitmapTransformer transformer = SkBitmapTransformer(bitmap, supportedPixelFormat);
REPORTER_ASSERT(fReporter, !transformer.isValid());
}
// Valid transformations:
{
// Bytes we expect to get:
const int kWidth = 3;
const int kHeight = 5;
const unsigned char comparisonBuffer[] = {
// kHeight rows, each with kWidth pixels, premultiplied ARGB for each pixel
0xff,0xff,0x00,0x00, 0xff,0xff,0x00,0x00, 0xff,0xff,0x00,0x00, // red
0xff,0x00,0xff,0x00, 0xff,0x00,0xff,0x00, 0xff,0x00,0xff,0x00, // green
0xff,0x00,0x00,0xff, 0xff,0x00,0x00,0xff, 0xff,0x00,0x00,0xff, // blue
0xff,0x00,0x00,0xff, 0xff,0x00,0x00,0xff, 0xff,0x00,0x00,0xff, // blue
0xff,0x00,0x00,0xff, 0xff,0x00,0x00,0xff, 0xff,0x00,0x00,0xff, // blue
};
// A bitmap that should generate the above bytes:
bitmap.setConfig(supportedConfig, kWidth, kHeight);
REPORTER_ASSERT(fReporter, bitmap.allocPixels());
bitmap.setIsOpaque(true);
bitmap.eraseColor(SK_ColorBLUE);
bitmap.lockPixels();
// Change rows [0,1] from blue to [red,green].
SkColor oldColor = SK_ColorBLUE;
SkColor newColors[] = {SK_ColorRED, SK_ColorGREEN};
for (int y = 0; y <= 1; y++) {
for (int x = 0; x < kWidth; x++) {
REPORTER_ASSERT(fReporter, bitmap.getColor(x, y) == oldColor);
SkPMColor* pixel = static_cast<SkPMColor *>(bitmap.getAddr(x, y));
*pixel = SkPreMultiplyColor(newColors[y]);
REPORTER_ASSERT(fReporter, bitmap.getColor(x, y) == newColors[y]);
}
}
bitmap.unlockPixels();
// Transform the bitmap and confirm we got the expected results.
SkBitmapTransformer transformer = SkBitmapTransformer(bitmap, supportedPixelFormat);
REPORTER_ASSERT(fReporter, transformer.isValid());
REPORTER_ASSERT(fReporter, transformer.bytesNeededPerRow() == kWidth * 4);
REPORTER_ASSERT(fReporter, transformer.bytesNeededTotal() == kWidth * kHeight * 4);
int bufferSize = transformer.bytesNeededTotal();
SkAutoMalloc pixelBufferManager(bufferSize);
char *pixelBuffer = static_cast<char *>(pixelBufferManager.get());
REPORTER_ASSERT(fReporter,
transformer.copyBitmapToPixelBuffer(pixelBuffer, bufferSize));
REPORTER_ASSERT(fReporter, bufferSize == sizeof(comparisonBuffer));
REPORTER_ASSERT(fReporter, memcmp(pixelBuffer, comparisonBuffer, bufferSize) == 0);
}
}
Reporter* fReporter;
};
static TestRegistry gReg(BitmapTransformerTestClass::Factory);
}
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