mirror of
https://github.com/yquake2/yquake2remaster.git
synced 2024-11-10 07:12:07 +00:00
Import the Quake III Arena TGA loader and replace out implementation
with it. The Q3A is about ~40% faster and supports more types of TGA files, including bottom to top encoded images.
This commit is contained in:
Yamagi Burmeister
parent
43fcc8eb99
commit
7db2d76833
1 changed files with 251 additions and 104 deletions
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@ -36,116 +36,138 @@ typedef struct _TargaHeader
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} TargaHeader;
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void
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LoadTGA ( char *origname, byte **pic, int *width, int *height )
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LoadTGA(char *origname, byte **pic, int *width, int *height)
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{
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int columns, rows, numPixels;
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unsigned rows, numPixels;
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byte *pixbuf;
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int row, column;
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int row, column, columns;
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byte *buf_p;
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byte *buffer;
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int length;
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int len;
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TargaHeader targa_header;
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byte *targa_rgba;
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byte tmp [ 2 ];
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int length;
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int pixel_size;
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char name[256];
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int len;
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/* Add the extension */
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len = strlen( origname );
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len = strlen(origname);
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if ( strcmp( origname + len - 4, ".tga" ) )
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if (strcmp(origname + len - 4, ".tga"))
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{
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strncpy( name, origname, 256 );
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strncpy(name, origname, 256);
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strncat(name, ".tga", 255);
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}
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else
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{
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strncpy( name, origname, 256 );
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strncpy(name, origname, 256);
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}
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*pic = NULL;
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/* load the file */
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length = ri.FS_LoadFile( name, (void **) &buffer );
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length = ri.FS_LoadFile(name, (void **)&buffer);
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if ( !buffer )
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if (!buffer)
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{
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ri.Con_Printf( PRINT_DEVELOPER, "Bad tga file %s\n", name );
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return;
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}
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if (length < 18)
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{
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ri.Sys_Error(ERR_DROP, "LoadTGA: %s has an invalid file size", name);
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}
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buf_p = buffer;
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targa_header.id_length = *buf_p++;
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targa_header.colormap_type = *buf_p++;
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targa_header.image_type = *buf_p++;
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targa_header.id_length = buf_p[0];
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targa_header.colormap_type = buf_p[1];
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targa_header.image_type = buf_p[2];
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tmp [ 0 ] = buf_p [ 0 ];
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tmp [ 1 ] = buf_p [ 1 ];
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targa_header.colormap_index = LittleShort( *( (short *) tmp ) );
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buf_p += 2;
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tmp [ 0 ] = buf_p [ 0 ];
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tmp [ 1 ] = buf_p [ 1 ];
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targa_header.colormap_length = LittleShort( *( (short *) tmp ) );
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buf_p += 2;
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targa_header.colormap_size = *buf_p++;
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targa_header.x_origin = LittleShort( *( (short *) buf_p ) );
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buf_p += 2;
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targa_header.y_origin = LittleShort( *( (short *) buf_p ) );
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buf_p += 2;
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targa_header.width = LittleShort( *( (short *) buf_p ) );
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buf_p += 2;
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targa_header.height = LittleShort( *( (short *) buf_p ) );
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buf_p += 2;
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targa_header.pixel_size = *buf_p++;
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targa_header.attributes = *buf_p++;
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memcpy(&targa_header.colormap_index, &buf_p[3], 2);
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memcpy(&targa_header.colormap_length, &buf_p[5], 2);
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targa_header.colormap_size = buf_p[7];
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memcpy(&targa_header.x_origin, &buf_p[8], 2);
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memcpy(&targa_header.y_origin, &buf_p[10], 2);
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memcpy(&targa_header.width, &buf_p[12], 2);
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memcpy(&targa_header.height, &buf_p[14], 2);
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targa_header.pixel_size = buf_p[16];
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targa_header.attributes = buf_p[17];
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if ( ( targa_header.image_type != 2 ) &&
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( targa_header.image_type != 10 ) )
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targa_header.colormap_index = LittleShort(targa_header.colormap_index);
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targa_header.colormap_length = LittleShort(targa_header.colormap_length);
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targa_header.x_origin = LittleShort(targa_header.x_origin);
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targa_header.y_origin = LittleShort(targa_header.y_origin);
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targa_header.width = LittleShort(targa_header.width);
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targa_header.height = LittleShort(targa_header.height);
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buf_p += 18;
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if ((targa_header.image_type != 2) &&
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(targa_header.image_type != 10) &&
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(targa_header.image_type != 3))
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{
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ri.Sys_Error( ERR_DROP, "LoadTGA: Only type 2 and 10 targa RGB images supported\n" );
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ri.Sys_Error( ERR_DROP, "LoadTGA (%s): Only type 2 (RGB), 3 (gray), and 10 (RGB) TGA images supported", name);
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}
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if ( ( targa_header.colormap_type != 0 ) ||
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( ( targa_header.pixel_size != 32 ) && ( targa_header.pixel_size != 24 ) ) )
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if (targa_header.colormap_type != 0)
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{
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ri.Sys_Error( ERR_DROP, "LoadTGA: Only 32 or 24 bit images supported (no colormaps)\n" );
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ri.Sys_Error(ERR_DROP, "LoadTGA (%s): colormaps not supported", name);
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}
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if (((targa_header.pixel_size != 32) && (targa_header.pixel_size != 24)) && (targa_header.image_type != 3))
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{
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ri.Sys_Error( ERR_DROP, "LoadTGA (%s): Only 32 or 24 bit images supported (no colormaps)", name);
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}
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columns = targa_header.width;
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rows = targa_header.height;
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numPixels = columns * rows;
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numPixels = columns * rows * 4;
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if ( width )
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if (width)
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{
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*width = columns;
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}
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if ( height )
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if (height)
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{
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*height = rows;
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}
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targa_rgba = malloc( numPixels * 4 );
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if (!columns || !rows || (numPixels > 0x7FFFFFFF) || (numPixels / columns / 4 != rows))
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{
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ri.Sys_Error(ERR_DROP, "LoadTGA (%s): Invalid image size", name);
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}
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targa_rgba = malloc(numPixels);
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*pic = targa_rgba;
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if ( targa_header.id_length != 0 )
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if (targa_header.id_length != 0)
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{
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buf_p += targa_header.id_length; /* skip TARGA image comment */
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}
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if ( targa_header.image_type == 2 ) /* Uncompressed, RGB images */
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pixel_size = targa_header.pixel_size;
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if ((targa_header.image_type == 2) || (targa_header.image_type == 3))
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{
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for ( row = rows - 1; row >= 0; row-- )
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/* Uncompressed RGB or gray scale image */
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switch (pixel_size)
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{
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case 24:
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if (buf_p - buffer + (3 * columns * rows) > length)
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{
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ri.Sys_Error( ERR_DROP, "LoadTGA: (%s): Pointer passed end of file - corrupt TGA file", name);
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}
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for (row = rows - 1; row >= 0; row--)
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{
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pixbuf = targa_rgba + row * columns * 4;
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for ( column = 0; column < columns; column++ )
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for (column = 0; column < columns; column++)
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{
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unsigned char red, green, blue, alphabyte;
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switch ( targa_header.pixel_size )
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{
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case 24:
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unsigned char red, green, blue;
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blue = *buf_p++;
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green = *buf_p++;
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@ -154,8 +176,26 @@ LoadTGA ( char *origname, byte **pic, int *width, int *height )
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*pixbuf++ = green;
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*pixbuf++ = blue;
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*pixbuf++ = 255;
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}
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}
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break;
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case 32:
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if (buf_p - buffer + (4 * columns * rows) > length)
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{
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ri.Sys_Error( ERR_DROP, "LoadTGA: (%s): Pointer passed end of file - corrupt TGA file", name);
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}
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for (row = rows - 1; row >= 0; row--)
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{
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pixbuf = targa_rgba + row * columns * 4;
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for (column = 0; column < columns; column++)
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{
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unsigned char red, green, blue, alphabyte;
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blue = *buf_p++;
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green = *buf_p++;
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red = *buf_p++;
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@ -164,49 +204,93 @@ LoadTGA ( char *origname, byte **pic, int *width, int *height )
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*pixbuf++ = green;
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*pixbuf++ = blue;
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*pixbuf++ = alphabyte;
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break;
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}
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}
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}
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}
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else if ( targa_header.image_type == 10 ) /* Runlength encoded RGB images */
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{
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unsigned char red, green, blue, alphabyte, packetHeader, packetSize, j;
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for ( row = rows - 1; row >= 0; row-- )
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break;
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case 8:
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if (buf_p - buffer + (1 * columns * rows) > length)
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{
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ri.Sys_Error( ERR_DROP, "LoadTGA: (%s): Pointer passed end of file - corrupt TGA file", name);
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}
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for (row = rows - 1; row >= 0; row--)
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{
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pixbuf = targa_rgba + row * columns * 4;
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for ( column = 0; column < columns; )
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for (column = 0; column < columns; column++)
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{
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unsigned char red, green, blue;
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blue = *buf_p++;
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green = blue;
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red = blue;
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*pixbuf++ = red;
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*pixbuf++ = green;
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*pixbuf++ = blue;
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*pixbuf++ = 255;
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}
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}
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break;
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}
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}
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else if (targa_header.image_type == 10)
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{
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/* Runlength encoded RGB images */
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byte red, green, blue, alphabyte, packetHeader;
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unsigned packetSize, j;
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red = 0;
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green = 0;
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blue = 0;
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alphabyte = 0xff;
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for (row = rows - 1; row >= 0; row--)
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{
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pixbuf = targa_rgba + row * columns * 4;
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for (column = 0; column < columns; )
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{
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packetHeader = *buf_p++;
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packetSize = 1 + ( packetHeader & 0x7f );
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packetSize = 1 + (packetHeader & 0x7f);
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if ( packetHeader & 0x80 ) /* run-length packet */
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if (packetHeader & 0x80)
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{
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switch ( targa_header.pixel_size )
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/* run-length packet */
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switch (pixel_size)
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{
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case 24:
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if (buf_p - buffer + (3) > length)
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{
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ri.Sys_Error( ERR_DROP, "LoadTGA: (%s): Pointer passed end of file - corrupt TGA file", name);
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}
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blue = *buf_p++;
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green = *buf_p++;
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red = *buf_p++;
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alphabyte = 255;
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break;
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case 32:
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if (buf_p - buffer + (4) > length)
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{
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ri.Sys_Error( ERR_DROP, "LoadTGA: (%s): Pointer passed end of file - corrupt TGA file", name);
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}
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blue = *buf_p++;
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green = *buf_p++;
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red = *buf_p++;
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alphabyte = *buf_p++;
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break;
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default:
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blue = 0;
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green = 0;
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red = 0;
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alphabyte = 0;
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break;
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}
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for ( j = 0; j < packetSize; j++ )
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for (j = 0; j < packetSize; j++)
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{
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*pixbuf++ = red;
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*pixbuf++ = green;
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@ -214,12 +298,12 @@ LoadTGA ( char *origname, byte **pic, int *width, int *height )
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*pixbuf++ = alphabyte;
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column++;
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/* run spans across rows */
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if ( column == columns )
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if (column == columns)
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{
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/* run spans across rows */
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column = 0;
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if ( row > 0 )
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if (row > 0)
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{
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row--;
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}
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@ -232,13 +316,20 @@ LoadTGA ( char *origname, byte **pic, int *width, int *height )
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}
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}
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}
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else /* non run-length packet */
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else
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{
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for ( j = 0; j < packetSize; j++ )
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{
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switch ( targa_header.pixel_size )
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/* non run-length packet */
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switch (pixel_size)
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{
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case 24:
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if (buf_p - buffer + (3 * packetSize) > length)
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{
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ri.Sys_Error( ERR_DROP, "LoadTGA: (%s): Pointer passed end of file - corrupt TGA file", name);
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}
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for (j = 0; j < packetSize; j++)
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{
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blue = *buf_p++;
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green = *buf_p++;
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red = *buf_p++;
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@ -246,26 +337,15 @@ LoadTGA ( char *origname, byte **pic, int *width, int *height )
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*pixbuf++ = green;
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*pixbuf++ = blue;
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*pixbuf++ = 255;
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break;
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case 32:
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blue = *buf_p++;
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green = *buf_p++;
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red = *buf_p++;
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alphabyte = *buf_p++;
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*pixbuf++ = red;
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*pixbuf++ = green;
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*pixbuf++ = blue;
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*pixbuf++ = alphabyte;
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break;
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}
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column++;
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if ( column == columns ) /* pixel packet run spans across rows */
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if (column == columns)
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{
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/* pixel packet run spans across rows */
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column = 0;
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if ( row > 0 )
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if (row > 0)
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{
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row--;
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}
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@ -277,6 +357,52 @@ LoadTGA ( char *origname, byte **pic, int *width, int *height )
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pixbuf = targa_rgba + row * columns * 4;
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}
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}
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break;
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case 32:
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if (buf_p - buffer + (4 * packetSize) > length)
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{
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ri.Sys_Error( ERR_DROP, "LoadTGA: (%s): Pointer passed end of file - corrupt TGA file", name);
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}
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for (j = 0; j < packetSize; j++)
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{
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blue = *buf_p++;
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green = *buf_p++;
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red = *buf_p++;
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alphabyte = *buf_p++;
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*pixbuf++ = red;
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*pixbuf++ = green;
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*pixbuf++ = blue;
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*pixbuf++ = alphabyte;
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column++;
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if (column == columns)
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{
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/* pixel packet run spans across rows */
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column = 0;
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if (row > 0)
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{
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row--;
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}
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else
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{
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goto breakOut;
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}
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pixbuf = targa_rgba + row * columns * 4;
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}
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}
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break;
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default:
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break;
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}
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}
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}
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@ -284,6 +410,27 @@ LoadTGA ( char *origname, byte **pic, int *width, int *height )
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}
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}
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ri.FS_FreeFile( buffer );
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if (targa_header.attributes & 0x20)
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{
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byte *temp;
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temp = malloc(numPixels);
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if (!temp)
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{
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ri.Sys_Error(ERR_FATAL, "LoadTGA: not enough memory");
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}
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ri.Con_Printf(PRINT_DEVELOPER, "LoadTGA: Bottom-to-top TGA file (slow): %s\n", name);
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memcpy(temp, targa_rgba, numPixels);
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for (row = 0; row < rows; row++)
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{
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memcpy(targa_rgba + (row * columns * 4), temp + (rows - row - 1) * columns * 4, columns * 4);
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}
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free(temp);
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}
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ri.FS_FreeFile(buffer);
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}
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