1 #include "../stdafx.h"

     2 #include "../zoom.hpp"

     3 #include "../gfx.h"

     4 #include "8bpp_slow.hpp"

     5 

     6 static FBlitter_8bppSimple iFBlitter_8bppSimple;

     7 

     8 extern void* AllocSprite(size_t);

     9 

    10 void Blitter_8bppSimple::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom)

    11 {

    12 	const byte *src, *src_line;

    13 	Pixel8 *dst, *dst_line;

    14 

    15 	/* Find where to start reading in the source sprite */

    16 	src_line = (const byte *)bp->sprite + (bp->skip_top * bp->sprite_width + bp->skip_left) * ScaleByZoom(1, zoom);

    17 	dst_line = (Pixel8 *)bp->dst + bp->top * bp->pitch + bp->left;

    18 

    19 	for (int y = 0; y < bp->height; y++) {

    20 		dst = dst_line;

    21 		dst_line += bp->pitch;

    22 

    23 		src = src_line;

    24 		src_line += bp->sprite_width * ScaleByZoom(1, zoom);

    25 

    26 		for (int x = 0; x < bp->width; x++) {

    27 			uint color = 0;

    28 

    29 			switch (mode) {

    30 				case BM_COLOUR_REMAP:

    31 					color = bp->remap[*src];

    32 					break;

    33 

    34 				case BM_TRANSPARENT:

    35 					if (*src != 0) color = bp->remap[*dst];

    36 					break;

    37 

    38 				default:

    39 					color = *src;

    40 					break;

    41 			}

    42 			if (color != 0) *dst = color;

    43 			dst++;

    44 			src += ScaleByZoom(1, zoom);

    45 		}

    46 	}

    47 }

    48 

    49 Sprite *Blitter_8bppSimple::Encode(SpriteLoader::Sprite *sprite)

    50 {

    51 	Sprite *dest_sprite;

    52 	dest_sprite = (Sprite *)AllocSprite(sizeof(*dest_sprite) + sprite->height * sprite->width);

    53 

    54 	dest_sprite->height = sprite->height;

    55 	dest_sprite->width  = sprite->width;

    56 	dest_sprite->x_offs = sprite->x_offs;

    57 	dest_sprite->y_offs = sprite->y_offs;

    58 

    59 	/* Copy over only the 'remap' channel, as that is what we care about in 8bpp */

    60 	for (int i = 0; i < sprite->height * sprite->width; i++) {

    61 		dest_sprite->data[i] = sprite->data[i].m;

    62 	}

    63 

    64 	return dest_sprite;

    65 }