rubidium@6872: /* $Id$ */
rubidium@6872: 
richk@6720: #include "../stdafx.h"
rubidium@6872: #include "../gfx_func.h"
rubidium@6872: #include "../zoom_func.h"
richk@6720: #include "../debug.h"
rubidium@6872: #include "32bpp_simple.hpp"
rubidium@6872: 
richk@6720: #include "../table/sprites.h"
richk@6720: 
richk@6720: static FBlitter_32bppSimple iFBlitter_32bppSimple;
richk@6720: 
richk@6720: void Blitter_32bppSimple::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom)
richk@6720: {
richk@6720: 	const SpriteLoader::CommonPixel *src, *src_line;
richk@6720: 	uint32 *dst, *dst_line;
richk@6720: 
richk@6720: 	/* Find where to start reading in the source sprite */
richk@6720: 	src_line = (const SpriteLoader::CommonPixel *)bp->sprite + (bp->skip_top * bp->sprite_width + bp->skip_left) * ScaleByZoom(1, zoom);
richk@6720: 	dst_line = (uint32 *)bp->dst + bp->top * bp->pitch + bp->left;
richk@6720: 
richk@6720: 	for (int y = 0; y < bp->height; y++) {
richk@6720: 		dst = dst_line;
richk@6720: 		dst_line += bp->pitch;
richk@6720: 
richk@6720: 		src = src_line;
richk@6720: 		src_line += bp->sprite_width * ScaleByZoom(1, zoom);
richk@6720: 
richk@6720: 		for (int x = 0; x < bp->width; x++) {
richk@6720: 			switch (mode) {
richk@6720: 				case BM_COLOUR_REMAP:
richk@6720: 					/* In case the m-channel is zero, do not remap this pixel in any way */
richk@6720: 					if (src->m == 0) {
richk@6720: 						if (src->a != 0) *dst = ComposeColourRGBA(src->r, src->g, src->b, src->a, *dst);
richk@6720: 					} else {
richk@6720: 						if (bp->remap[src->m] != 0) *dst = ComposeColourPA(this->LookupColourInPalette(bp->remap[src->m]), src->a, *dst);
richk@6720: 					}
richk@6720: 					break;
richk@6720: 
richk@6720: 				case BM_TRANSPARENT:
richk@6720: 					/* TODO -- We make an assumption here that the remap in fact is transparency, not some color.
richk@6720: 					 *  This is never a problem with the code we produce, but newgrfs can make it fail... or at least:
richk@6720: 					 *  we produce a result the newgrf maker didn't expect ;) */
richk@6720: 
richk@6720: 					/* Make the current color a bit more black, so it looks like this image is transparent */
rubidium@6870: 					if (src->a != 0) *dst = MakeTransparent(*dst, 192);
richk@6720: 					break;
richk@6720: 
richk@6720: 				default:
richk@6720: 					if (src->a != 0) *dst = ComposeColourRGBA(src->r, src->g, src->b, src->a, *dst);
richk@6720: 					break;
richk@6720: 			}
richk@6720: 			dst++;
richk@6720: 			src += ScaleByZoom(1, zoom);
richk@6720: 		}
richk@6720: 	}
richk@6720: }
richk@6720: 
richk@6720: void Blitter_32bppSimple::DrawColorMappingRect(void *dst, int width, int height, int pal)
richk@6720: {
richk@6720: 	uint32 *udst = (uint32 *)dst;
richk@6720: 
richk@6720: 	if (pal == PALETTE_TO_TRANSPARENT) {
richk@6720: 		do {
richk@6720: 			for (int i = 0; i != width; i++) {
rubidium@6870: 				*udst = MakeTransparent(*udst, 154);
richk@6720: 				udst++;
richk@6720: 			}
richk@6720: 			udst = udst - width + _screen.pitch;
richk@6720: 		} while (--height);
richk@6720: 		return;
richk@6720: 	}
richk@6720: 	if (pal == PALETTE_TO_STRUCT_GREY) {
richk@6720: 		do {
richk@6720: 			for (int i = 0; i != width; i++) {
richk@6720: 				*udst = MakeGrey(*udst);
richk@6720: 				udst++;
richk@6720: 			}
richk@6720: 			udst = udst - width + _screen.pitch;
richk@6720: 		} while (--height);
richk@6720: 		return;
richk@6720: 	}
richk@6720: 
richk@6720: 	DEBUG(misc, 0, "32bpp blitter doesn't know how to draw this color table ('%d')", pal);
richk@6720: }
richk@6720: 
richk@6720: Sprite *Blitter_32bppSimple::Encode(SpriteLoader::Sprite *sprite, Blitter::AllocatorProc *allocator)
richk@6720: {
richk@6720: 	Sprite *dest_sprite;
richk@6720: 	SpriteLoader::CommonPixel *dst;
richk@6720: 	dest_sprite = (Sprite *)allocator(sizeof(*dest_sprite) + sprite->height * sprite->width * sizeof(SpriteLoader::CommonPixel));
richk@6720: 
richk@6720: 	dest_sprite->height = sprite->height;
richk@6720: 	dest_sprite->width  = sprite->width;
richk@6720: 	dest_sprite->x_offs = sprite->x_offs;
richk@6720: 	dest_sprite->y_offs = sprite->y_offs;
richk@6720: 
richk@6720: 	dst = (SpriteLoader::CommonPixel *)dest_sprite->data;
richk@6720: 
richk@6720: 	memcpy(dst, sprite->data, sprite->height * sprite->width * sizeof(SpriteLoader::CommonPixel));
richk@6720: 	for (int i = 0; i < sprite->height * sprite->width; i++) {
richk@6720: 		if (dst[i].m != 0) {
richk@6720: 			/* Pre-convert the mapping channel to a RGB value */
richk@6720: 			uint color = this->LookupColourInPalette(dst[i].m);
richk@6720: 			dst[i].r = GB(color, 16, 8);
richk@6720: 			dst[i].g = GB(color, 8,  8);
richk@6720: 			dst[i].b = GB(color, 0,  8);
richk@6720: 		}
richk@6720: 	}
richk@6720: 
richk@6720: 	return dest_sprite;
richk@6720: }