author | rubidium |
Sat, 06 Oct 2007 21:16:00 +0000 | |
branch | NewGRF_ports |
changeset 6870 | ca3fd1fbe311 |
child 6872 | 1c4a4a609f85 |
child 8587 | 6db234b2b897 |
child 9723 | eee46cb39750 |
permissions | -rw-r--r-- |
6870
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1 |
#include "../stdafx.h" |
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2 |
#include "../zoom.hpp" |
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3 |
#include "../gfx.h" |
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4 |
#include "../debug.h" |
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5 |
#include "../table/sprites.h" |
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6 |
#include "32bpp_optimized.hpp" |
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7 |
|
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8 |
static FBlitter_32bppOptimized iFBlitter_32bppOptimized; |
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9 |
|
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10 |
void Blitter_32bppOptimized::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom) |
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11 |
{ |
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12 |
const SpriteLoader::CommonPixel *src, *src_line; |
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13 |
uint32 *dst, *dst_line; |
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14 |
|
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15 |
/* Find where to start reading in the source sprite */ |
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16 |
src_line = (const SpriteLoader::CommonPixel *)bp->sprite + (bp->skip_top * bp->sprite_width + bp->skip_left) * ScaleByZoom(1, zoom); |
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17 |
dst_line = (uint32 *)bp->dst + bp->top * bp->pitch + bp->left; |
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18 |
|
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19 |
for (int y = 0; y < bp->height; y++) { |
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20 |
dst = dst_line; |
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21 |
dst_line += bp->pitch; |
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22 |
|
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23 |
src = src_line; |
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24 |
src_line += bp->sprite_width * ScaleByZoom(1, zoom); |
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25 |
|
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26 |
for (int x = 0; x < bp->width; x++) { |
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27 |
if (src->a == 0) { |
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28 |
/* src->r is 'misused' here to indicate how much more pixels are following with an alpha of 0 */ |
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29 |
int skip = UnScaleByZoom(src->r, zoom); |
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30 |
|
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31 |
dst += skip; |
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32 |
x += skip - 1; |
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33 |
src += ScaleByZoom(1, zoom) * skip; |
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34 |
continue; |
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35 |
} |
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36 |
|
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37 |
switch (mode) { |
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38 |
case BM_COLOUR_REMAP: |
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39 |
/* In case the m-channel is zero, do not remap this pixel in any way */ |
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40 |
if (src->m == 0) { |
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41 |
*dst = ComposeColourRGBA(src->r, src->g, src->b, src->a, *dst); |
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42 |
} else { |
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if (bp->remap[src->m] != 0) *dst = ComposeColourPA(this->LookupColourInPalette(bp->remap[src->m]), src->a, *dst); |
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44 |
} |
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45 |
break; |
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46 |
|
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47 |
case BM_TRANSPARENT: |
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48 |
/* TODO -- We make an assumption here that the remap in fact is transparency, not some color. |
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* This is never a problem with the code we produce, but newgrfs can make it fail... or at least: |
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50 |
* we produce a result the newgrf maker didn't expect ;) */ |
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51 |
|
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52 |
/* Make the current color a bit more black, so it looks like this image is transparent */ |
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53 |
*dst = MakeTransparent(*dst, 192); |
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54 |
break; |
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55 |
|
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56 |
default: |
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*dst = ComposeColourRGBA(src->r, src->g, src->b, src->a, *dst); |
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58 |
break; |
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59 |
} |
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60 |
dst++; |
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61 |
src += ScaleByZoom(1, zoom); |
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62 |
} |
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63 |
} |
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64 |
} |
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65 |
|
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66 |
Sprite *Blitter_32bppOptimized::Encode(SpriteLoader::Sprite *sprite, Blitter::AllocatorProc *allocator) |
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67 |
{ |
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68 |
Sprite *dest_sprite; |
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69 |
SpriteLoader::CommonPixel *dst; |
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70 |
dest_sprite = (Sprite *)allocator(sizeof(*dest_sprite) + sprite->height * sprite->width * sizeof(SpriteLoader::CommonPixel)); |
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71 |
|
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dest_sprite->height = sprite->height; |
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73 |
dest_sprite->width = sprite->width; |
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dest_sprite->x_offs = sprite->x_offs; |
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75 |
dest_sprite->y_offs = sprite->y_offs; |
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76 |
|
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77 |
dst = (SpriteLoader::CommonPixel *)dest_sprite->data; |
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78 |
|
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79 |
memcpy(dst, sprite->data, sprite->height * sprite->width * sizeof(SpriteLoader::CommonPixel)); |
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80 |
/* Skip to the end of the array, and work backwards to find transparent blocks */ |
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81 |
dst = dst + sprite->height * sprite->width - 1; |
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82 |
|
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83 |
for (uint y = sprite->height; y > 0; y--) { |
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84 |
int trans = 0; |
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85 |
/* Process sprite line backwards, to compute lengths of transparent blocks */ |
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86 |
for (uint x = sprite->width; x > 0; x--) { |
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87 |
if (dst->a == 0) { |
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88 |
/* Save transparent block length in red channel; max value is 255 the red channel can contain */ |
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89 |
if (trans < 255) trans++; |
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90 |
dst->r = trans; |
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91 |
dst->g = 0; |
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92 |
dst->b = 0; |
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93 |
dst->m = 0; |
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94 |
} else { |
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95 |
trans = 0; |
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96 |
if (dst->m != 0) { |
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97 |
/* Pre-convert the mapping channel to a RGB value */ |
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98 |
uint color = this->LookupColourInPalette(dst->m); |
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99 |
dst->r = GB(color, 16, 8); |
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100 |
dst->g = GB(color, 8, 8); |
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101 |
dst->b = GB(color, 0, 8); |
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102 |
} |
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103 |
} |
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104 |
dst--; |
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105 |
} |
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106 |
} |
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107 |
return dest_sprite; |
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108 |
} |