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(); } }
void RenderManager::readImageToSurface(const Common::String &fileName, Graphics::Surface &destination) { Common::File file; if (!file.open(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; Graphics::TGADecoder tga; uint16 *buffer; bool isTransposed = _renderTable.getRenderState() == RenderTable::PANORAMA; // All ZVision images are in RGB 555 Graphics::PixelFormat pixelFormat555 = Graphics::PixelFormat(2, 5, 5, 5, 0, 10, 5, 0, 0); destination.format = pixelFormat555; 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(); imageWidth = file.readSint32LE(); imageHeight = file.readSint32LE(); LzssReadStream lzssStream(&file); buffer = (uint16 *)(new uint16[decompressedSize]); lzssStream.read(buffer, decompressedSize); } 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 (isTransposed) { 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, pixelFormat555); } // If transposed, 'un-transpose' the data while copying it to the destination // Otherwise, just do a simple copy if (isTransposed) { 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 * _pixelFormat.bytesPerPixel); } // Cleanup if (isTGZ) { delete[] buffer; } else { tga.destroy(); } // Convert in place to RGB 565 from RGB 555 destination.convertToInPlace(_pixelFormat); }