9703
|
1 |
#include "../stdafx.h"
|
|
2 |
#include "../zoom.hpp"
|
|
3 |
#include "../gfx.h"
|
|
4 |
#include "../debug.h"
|
|
5 |
#include "../table/sprites.h"
|
|
6 |
#include "32bpp_optimized.hpp"
|
|
7 |
|
|
8 |
static FBlitter_32bppOptimized iFBlitter_32bppOptimized;
|
|
9 |
|
|
10 |
void Blitter_32bppOptimized::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom)
|
|
11 |
{
|
|
12 |
const SpriteLoader::CommonPixel *src, *src_line;
|
|
13 |
uint32 *dst, *dst_line;
|
|
14 |
|
|
15 |
/* Find where to start reading in the source sprite */
|
|
16 |
src_line = (const SpriteLoader::CommonPixel *)bp->sprite + (bp->skip_top * bp->sprite_width + bp->skip_left) * ScaleByZoom(1, zoom);
|
|
17 |
dst_line = (uint32 *)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 |
if (src->a == 0) {
|
|
28 |
/* src->r is 'misused' here to indicate how much more pixels are following with an alpha of 0 */
|
|
29 |
int skip = UnScaleByZoom(src->r, zoom);
|
|
30 |
|
|
31 |
dst += skip;
|
|
32 |
x += skip - 1;
|
|
33 |
src += ScaleByZoom(1, zoom) * skip;
|
|
34 |
continue;
|
|
35 |
}
|
|
36 |
|
|
37 |
switch (mode) {
|
|
38 |
case BM_COLOUR_REMAP:
|
|
39 |
/* In case the m-channel is zero, do not remap this pixel in any way */
|
|
40 |
if (src->m == 0) {
|
|
41 |
*dst = ComposeColourRGBA(src->r, src->g, src->b, src->a, *dst);
|
|
42 |
} else {
|
|
43 |
if (bp->remap[src->m] != 0) *dst = ComposeColourPA(this->LookupColourInPalette(bp->remap[src->m]), src->a, *dst);
|
|
44 |
}
|
|
45 |
break;
|
|
46 |
|
|
47 |
case BM_TRANSPARENT:
|
|
48 |
/* TODO -- We make an assumption here that the remap in fact is transparency, not some color.
|
|
49 |
* This is never a problem with the code we produce, but newgrfs can make it fail... or at least:
|
|
50 |
* we produce a result the newgrf maker didn't expect ;) */
|
|
51 |
|
|
52 |
/* Make the current color a bit more black, so it looks like this image is transparent */
|
|
53 |
*dst = MakeTransparent(*dst, 192);
|
|
54 |
break;
|
|
55 |
|
|
56 |
default:
|
|
57 |
*dst = ComposeColourRGBA(src->r, src->g, src->b, src->a, *dst);
|
|
58 |
break;
|
|
59 |
}
|
|
60 |
dst++;
|
|
61 |
src += ScaleByZoom(1, zoom);
|
|
62 |
}
|
|
63 |
}
|
|
64 |
}
|
|
65 |
|
|
66 |
Sprite *Blitter_32bppOptimized::Encode(SpriteLoader::Sprite *sprite, Blitter::AllocatorProc *allocator)
|
|
67 |
{
|
|
68 |
Sprite *dest_sprite;
|
|
69 |
SpriteLoader::CommonPixel *dst;
|
|
70 |
dest_sprite = (Sprite *)allocator(sizeof(*dest_sprite) + sprite->height * sprite->width * sizeof(SpriteLoader::CommonPixel));
|
|
71 |
|
|
72 |
dest_sprite->height = sprite->height;
|
|
73 |
dest_sprite->width = sprite->width;
|
|
74 |
dest_sprite->x_offs = sprite->x_offs;
|
|
75 |
dest_sprite->y_offs = sprite->y_offs;
|
|
76 |
|
|
77 |
dst = (SpriteLoader::CommonPixel *)dest_sprite->data;
|
|
78 |
|
|
79 |
memcpy(dst, sprite->data, sprite->height * sprite->width * sizeof(SpriteLoader::CommonPixel));
|
|
80 |
/* Skip to the end of the array, and work backwards to find transparent blocks */
|
|
81 |
dst = dst + sprite->height * sprite->width - 1;
|
|
82 |
|
|
83 |
for (uint y = sprite->height; y > 0; y--) {
|
|
84 |
int trans = 0;
|
|
85 |
/* Process sprite line backwards, to compute lengths of transparent blocks */
|
|
86 |
for (uint x = sprite->width; x > 0; x--) {
|
|
87 |
if (dst->a == 0) {
|
|
88 |
/* Save transparent block length in red channel; max value is 255 the red channel can contain */
|
|
89 |
if (trans < 255) trans++;
|
|
90 |
dst->r = trans;
|
|
91 |
dst->g = 0;
|
|
92 |
dst->b = 0;
|
|
93 |
dst->m = 0;
|
|
94 |
} else {
|
|
95 |
trans = 0;
|
|
96 |
if (dst->m != 0) {
|
|
97 |
/* Pre-convert the mapping channel to a RGB value */
|
|
98 |
uint color = this->LookupColourInPalette(dst->m);
|
|
99 |
dst->r = GB(color, 16, 8);
|
|
100 |
dst->g = GB(color, 8, 8);
|
|
101 |
dst->b = GB(color, 0, 8);
|
|
102 |
}
|
|
103 |
}
|
|
104 |
dst--;
|
|
105 |
}
|
|
106 |
}
|
|
107 |
return dest_sprite;
|
|
108 |
}
|