00001 /* $Id: 8bpp_simple.cpp 25987 2013-11-13 21:53:40Z rubidium $ */ 00002 00003 /* 00004 * This file is part of OpenTTD. 00005 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2. 00006 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 00007 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>. 00008 */ 00009 00012 #include "../stdafx.h" 00013 #include "../zoom_func.h" 00014 #include "8bpp_simple.hpp" 00015 00017 static FBlitter_8bppSimple iFBlitter_8bppSimple; 00018 00019 void Blitter_8bppSimple::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom) 00020 { 00021 const uint8 *src, *src_line; 00022 uint8 *dst, *dst_line; 00023 00024 /* Find where to start reading in the source sprite */ 00025 src_line = (const uint8 *)bp->sprite + (bp->skip_top * bp->sprite_width + bp->skip_left) * ScaleByZoom(1, zoom); 00026 dst_line = (uint8 *)bp->dst + bp->top * bp->pitch + bp->left; 00027 00028 for (int y = 0; y < bp->height; y++) { 00029 dst = dst_line; 00030 dst_line += bp->pitch; 00031 00032 src = src_line; 00033 src_line += bp->sprite_width * ScaleByZoom(1, zoom); 00034 00035 for (int x = 0; x < bp->width; x++) { 00036 uint colour = 0; 00037 00038 switch (mode) { 00039 case BM_COLOUR_REMAP: 00040 colour = bp->remap[*src]; 00041 break; 00042 00043 case BM_TRANSPARENT: 00044 if (*src != 0) colour = bp->remap[*dst]; 00045 break; 00046 00047 default: 00048 colour = *src; 00049 break; 00050 } 00051 if (colour != 0) *dst = colour; 00052 dst++; 00053 src += ScaleByZoom(1, zoom); 00054 } 00055 } 00056 } 00057 00058 Sprite *Blitter_8bppSimple::Encode(const SpriteLoader::Sprite *sprite, AllocatorProc *allocator) 00059 { 00060 Sprite *dest_sprite; 00061 dest_sprite = (Sprite *)allocator(sizeof(*dest_sprite) + sprite->height * sprite->width); 00062 00063 dest_sprite->height = sprite->height; 00064 dest_sprite->width = sprite->width; 00065 dest_sprite->x_offs = sprite->x_offs; 00066 dest_sprite->y_offs = sprite->y_offs; 00067 00068 /* Copy over only the 'remap' channel, as that is what we care about in 8bpp */ 00069 for (int i = 0; i < sprite->height * sprite->width; i++) { 00070 dest_sprite->data[i] = sprite->data[i].m; 00071 } 00072 00073 return dest_sprite; 00074 }