C++ (Cpp) LLPngWrapper::writePng Examples

Example #1

File: llimagepng.cpp Project: jimjesus/kittyviewer

// Virtual
// Encode the in memory RGB image into PNG format.
BOOL LLImagePNG::encode(const LLImageRaw* raw_image, F32 encode_time)
{
	llassert_always(raw_image);

    resetLastError();

	// Image logical size
	setSize(raw_image->getWidth(), raw_image->getHeight(), raw_image->getComponents());

	// Temporary buffer to hold the encoded image. Note: the final image
	// size should be much smaller due to compression.
	U32 bufferSize = getWidth() * getHeight() * getComponents() + 1024;
    U8* tmpWriteBuffer = new U8[ bufferSize ];

	// Delegate actual encoding work to wrapper
	LLPngWrapper pngWrapper;
	if (! pngWrapper.writePng(raw_image, tmpWriteBuffer))
	{
		setLastError(pngWrapper.getErrorMessage());
		delete[] tmpWriteBuffer;
		return FALSE;
	}

	// Resize internal buffer and copy from temp
	U32 encodedSize = pngWrapper.getFinalSize();
	allocateData(encodedSize);
	memcpy(getData(), tmpWriteBuffer, encodedSize);

	delete[] tmpWriteBuffer;

	return TRUE;
}