示例#1
0
文件: bitmap.cpp 项目: Akz-/residual
bool BitmapData::loadTGA(Common::SeekableReadStream *data) {
	Image::TGADecoder dec;
	bool success = dec.loadStream(*data);

	if (!success)
		return false;

	const Graphics::Surface *origSurf = dec.getSurface();
	Graphics::PixelFormat pixelFormat = Graphics::PixelFormat(4, 8, 8, 8, 8, 0, 8, 16, 24);
	Graphics::Surface *surf = origSurf->convertTo(pixelFormat);

	_width = surf->w;
	_height = surf->h;
	_format = 1;
	_x = _y = 0;
	_bpp = 4;
	_colorFormat = BM_RGBA;
	_numImages = 1;
	_data = new Graphics::PixelBuffer[1];
	_data[0].set(pixelFormat, (unsigned char *)surf->getPixels());

	g_driver->createBitmap(this);

	freeData();
	delete surf;

	return true;
}
示例#2
0
void RenderManager::readImageToSurface(const Common::String &fileName, Graphics::Surface &destination, bool transposed) {
	Common::File file;

	if (!_engine->getSearchManager()->openFile(file, fileName)) {
		warning("Could not open file %s", fileName.c_str());
		return;
	}

	// Read the magic number
	// Some files are true TGA, while others are TGZ
	uint32 fileType = file.readUint32BE();

	uint32 imageWidth;
	uint32 imageHeight;
	Image::TGADecoder tga;
	uint16 *buffer;
	// All ZVision images are in RGB 555
	destination.format = _engine->_resourcePixelFormat;

	bool isTGZ;

	// Check for TGZ files
	if (fileType == MKTAG('T', 'G', 'Z', '\0')) {
		isTGZ = true;

		// TGZ files have a header and then Bitmap data that is compressed with LZSS
		uint32 decompressedSize = file.readSint32LE() / 2;
		imageWidth = file.readSint32LE();
		imageHeight = file.readSint32LE();

		LzssReadStream lzssStream(&file);
		buffer = (uint16 *)(new uint16[decompressedSize]);
		lzssStream.read(buffer, 2 * decompressedSize);
#ifndef SCUMM_LITTLE_ENDIAN
		for (uint32 i = 0; i < decompressedSize; ++i)
			buffer[i] = FROM_LE_16(buffer[i]);
#endif
	} else {
		isTGZ = false;

		// Reset the cursor
		file.seek(0);

		// Decode
		if (!tga.loadStream(file)) {
			warning("Error while reading TGA image");
			return;
		}

		Graphics::Surface tgaSurface = *(tga.getSurface());
		imageWidth = tgaSurface.w;
		imageHeight = tgaSurface.h;

		buffer = (uint16 *)tgaSurface.getPixels();
	}

	// Flip the width and height if transposed
	if (transposed) {
		uint16 temp = imageHeight;
		imageHeight = imageWidth;
		imageWidth = temp;
	}

	// If the destination internal buffer is the same size as what we're copying into it,
	// there is no need to free() and re-create
	if (imageWidth != destination.w || imageHeight != destination.h) {
		destination.create(imageWidth, imageHeight, _engine->_resourcePixelFormat);
	}

	// If transposed, 'un-transpose' the data while copying it to the destination
	// Otherwise, just do a simple copy
	if (transposed) {
		uint16 *dest = (uint16 *)destination.getPixels();

		for (uint32 y = 0; y < imageHeight; ++y) {
			uint32 columnIndex = y * imageWidth;

			for (uint32 x = 0; x < imageWidth; ++x) {
				dest[columnIndex + x] = buffer[x * imageHeight + y];
			}
		}
	} else {
		memcpy(destination.getPixels(), buffer, imageWidth * imageHeight * destination.format.bytesPerPixel);
	}

	// Cleanup
	if (isTGZ) {
		delete[] buffer;
	} else {
		tga.destroy();
	}
}