Ejemplos de mypng_struct_create en C++ (Cpp)

Ejemplo n.º 1

Archivo: ImagePNG.cpp Proyecto: DrLabman/QMB

void Image::LoadPNG(FILE *f, char *filename, Texture *tex) {
	png_structp png;
	png_infop pnginfo;
	byte ioBuffer[8192];
	byte *raw;

	int filesize = SystemFileManager::FileLength(f);
	raw = (byte *) malloc(filesize + 1);
	if (raw == NULL) {
		Sys_Error("Out of memory to load PNG: %s\n", filename);
		return;
	}

	fread(raw, 1, filesize, f);
	fclose(f);

	if (!raw) {
		Con_Printf("Bad png file %s\n", filename);
		return;
	}

	if (png_sig_cmp(raw, 0, 4)) {
		free(raw);
		return;
	}

	png = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
	if (!png) {
		free(raw);
		return;
	}

	pnginfo = png_create_info_struct(png);

	if (!pnginfo) {
		free(raw);
		png_destroy_read_struct(&png, &pnginfo, 0);
		return;
	}
	png_set_sig_bytes(png, 0/*sizeof( sig )*/);

	mypng_struct_create(); // creates the my_png struct

	my_png->tmpBuf = (char *) raw; //buf = whole file content
	my_png->tmpi = 0;

	png_set_read_fn(png, ioBuffer, fReadData);

	png_read_info(png, pnginfo);

	png_get_IHDR(png, pnginfo, &my_png->Width, &my_png->Height, &my_png->BitDepth, &my_png->ColorType, &my_png->Interlace, &my_png->Compression, &my_png->Filter);
	// ...removed bgColor code here...

	if (my_png->ColorType == PNG_COLOR_TYPE_PALETTE)
		png_set_palette_to_rgb(png);

	if (my_png->ColorType == PNG_COLOR_TYPE_GRAY && my_png->BitDepth < 8)
		png_set_expand_gray_1_2_4_to_8(png);

	// Add alpha channel if present
	if (png_get_valid(png, pnginfo, PNG_INFO_tRNS))
		png_set_tRNS_to_alpha(png);

	// hax: expand 24bit to 32bit
	if (my_png->BitDepth == 8 && my_png->ColorType == PNG_COLOR_TYPE_RGB)
		png_set_filler(png, 255, PNG_FILLER_AFTER);

	if ((my_png->ColorType == PNG_COLOR_TYPE_GRAY) || (my_png->ColorType == PNG_COLOR_TYPE_GRAY_ALPHA)) {
		png_set_gray_to_rgb(png);
		png_set_add_alpha(png, 255, PNG_FILLER_AFTER);
	}

	if (my_png->BitDepth < 8)
		png_set_expand(png);

	// update the info structure
	png_read_update_info(png, pnginfo);

	my_png->FRowBytes = png_get_rowbytes(png, pnginfo);
	my_png->BytesPerPixel = png_get_channels(png, pnginfo); // DL Added 30/08/2000

	InitializeDemData();
	if ((my_png->Data) && (my_png->FRowPtrs))
		png_read_image(png, (png_bytepp) my_png->FRowPtrs);

	png_read_end(png, pnginfo); // read last information chunks

	png_destroy_read_struct(&png, &pnginfo, 0);

	if (my_png->BitDepth == 8) {
		tex->width = my_png->Width;
		tex->height = my_png->Height;
		tex->bytesPerPixel = my_png->BytesPerPixel;
		tex->setData((byte *) my_png->Data);
	} else {
		Con_Printf("Bad png color depth: %s\n", filename);
		free(my_png->Data);
	}

	free(raw);
	mypng_struct_destroy(true);

	return;
}

Ejemplo n.º 2

Archivo: sul_png.c Proyecto: Jaegermeiste/quake2_322

void LoadPNG (char *filename, byte **pic, int *width, int *height) 
{
	png_structp png;
	png_infop pnginfo;
	byte ioBuffer[8192];
	int len;
	byte *raw;
	*pic=0;

	len = ri.FS_LoadFile (filename, (void **)&raw);

	if (!raw)
	{
		ri.Con_Printf (PRINT_DEVELOPER, "Bad png file %s\n", filename);
		return;
	}

	if( png_sig_cmp(raw,0,4)) 
		return;  

	png = png_create_read_struct(PNG_LIBPNG_VER_STRING,0,0,0);
	if(!png) 
		return;

	pnginfo = png_create_info_struct( png );

	if(!pnginfo) 
	{
		png_destroy_read_struct(&png,&pnginfo,0);
		return;
	}
	png_set_sig_bytes(png,0/*sizeof( sig )*/);

	mypng_struct_create(); // creates the my_png struct

	my_png->tmpBuf = raw; //buf = whole file content
	my_png->tmpi=0; 

	png_set_read_fn(png,ioBuffer,fReadData );

	png_read_info( png, pnginfo );

	png_get_IHDR(png, pnginfo, &my_png->Width, &my_png->Height,&my_png->BitDepth, &my_png->ColorType, &my_png->Interlace, &my_png->Compression, &my_png->Filter );
	// ...removed bgColor code here...

	if (my_png->ColorType == PNG_COLOR_TYPE_PALETTE)  
		png_set_palette_to_rgb(png);
	if (my_png->ColorType == PNG_COLOR_TYPE_GRAY && my_png->BitDepth < 8) 
		png_set_gray_1_2_4_to_8(png);

	// Add alpha channel if present
	if(png_get_valid( png, pnginfo, PNG_INFO_tRNS ))
		png_set_tRNS_to_alpha(png); 

	// hax: expand 24bit to 32bit
	if (my_png->BitDepth == 8 && my_png->ColorType == PNG_COLOR_TYPE_RGB) 
		png_set_filler(png,255, PNG_FILLER_AFTER);

	if (( my_png->ColorType == PNG_COLOR_TYPE_GRAY) || (my_png->ColorType == PNG_COLOR_TYPE_GRAY_ALPHA ))
		png_set_gray_to_rgb( png );


	if (my_png->BitDepth < 8)
		png_set_expand (png);

	// update the info structure
	png_read_update_info( png, pnginfo );

	my_png->FRowBytes = png_get_rowbytes( png, pnginfo );
	my_png->BytesPerPixel = png_get_channels( png, pnginfo );  // DL Added 30/08/2000

	InitializeDemData();
	if((my_png->Data)&&(my_png->FRowPtrs)) 
		png_read_image(png, (png_bytepp)my_png->FRowPtrs);

	png_read_end(png, pnginfo); // read last information chunks

	png_destroy_read_struct(&png, &pnginfo, 0);


	//only load 32 bit by now...
	if (my_png->BitDepth == 8)
	{
		*pic= my_png->Data;
		*width = my_png->Width;
		*height = my_png->Height;
	}
	else
	{
		ri.Con_Printf (PRINT_DEVELOPER, "Bad png color depth: %s\n", filename);
		*pic = NULL;
		free(my_png->Data);
	}

	mypng_struct_destroy(true);
	ri.FS_FreeFile ((void *)raw);
}