8bpp_optimized.cpp
Go to the documentation of this file.00001
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00012 #include "../stdafx.h"
00013 #include "../zoom_func.h"
00014 #include "../core/math_func.hpp"
00015 #include "8bpp_optimized.hpp"
00016
00018 static FBlitter_8bppOptimized iFBlitter_8bppOptimized;
00019
00020 void Blitter_8bppOptimized::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom)
00021 {
00022
00023 const SpriteData *sprite_src = (const SpriteData *)bp->sprite;
00024 uint offset = sprite_src->offset[zoom];
00025
00026
00027 const uint8 *src = sprite_src->data + offset;
00028 uint8 *dst_line = (uint8 *)bp->dst + bp->top * bp->pitch + bp->left;
00029
00030
00031 for (int y = 0; y < bp->skip_top; y++) {
00032 for (;;) {
00033 uint trans = *src++;
00034 uint pixels = *src++;
00035 if (trans == 0 && pixels == 0) break;
00036 src += pixels;
00037 }
00038 }
00039
00040 const uint8 *src_next = src;
00041
00042 for (int y = 0; y < bp->height; y++) {
00043 uint8 *dst = dst_line;
00044 dst_line += bp->pitch;
00045
00046 uint skip_left = bp->skip_left;
00047 int width = bp->width;
00048
00049 for (;;) {
00050 src = src_next;
00051 uint trans = *src++;
00052 uint pixels = *src++;
00053 src_next = src + pixels;
00054 if (trans == 0 && pixels == 0) break;
00055 if (width <= 0) continue;
00056
00057 if (skip_left != 0) {
00058 if (skip_left < trans) {
00059 trans -= skip_left;
00060 skip_left = 0;
00061 } else {
00062 skip_left -= trans;
00063 trans = 0;
00064 }
00065 if (skip_left < pixels) {
00066 src += skip_left;
00067 pixels -= skip_left;
00068 skip_left = 0;
00069 } else {
00070 src += pixels;
00071 skip_left -= pixels;
00072 pixels = 0;
00073 }
00074 }
00075 if (skip_left != 0) continue;
00076
00077
00078 dst += trans;
00079 width -= trans;
00080 if (width <= 0 || pixels == 0) continue;
00081 pixels = min<uint>(pixels, (uint)width);
00082 width -= pixels;
00083
00084 switch (mode) {
00085 case BM_COLOUR_REMAP: {
00086 const uint8 *remap = bp->remap;
00087 do {
00088 uint m = remap[*src];
00089 if (m != 0) *dst = m;
00090 dst++; src++;
00091 } while (--pixels != 0);
00092 break;
00093 }
00094
00095 case BM_TRANSPARENT: {
00096 const uint8 *remap = bp->remap;
00097 src += pixels;
00098 do {
00099 *dst = remap[*dst];
00100 dst++;
00101 } while (--pixels != 0);
00102 break;
00103 }
00104
00105 default:
00106 memcpy(dst, src, pixels);
00107 dst += pixels; src += pixels;
00108 break;
00109 }
00110 }
00111 }
00112 }
00113
00114 Sprite *Blitter_8bppOptimized::Encode(SpriteLoader::Sprite *sprite, AllocatorProc *allocator)
00115 {
00116
00117 uint memory = sizeof(SpriteData);
00118
00119 for (ZoomLevel i = ZOOM_LVL_BEGIN; i < ZOOM_LVL_END; i++) {
00120 memory += UnScaleByZoom(sprite->height, i) * UnScaleByZoom(sprite->width, i);
00121 }
00122
00123
00124 memory *= 5;
00125
00126
00127
00128
00129 static ReusableBuffer<byte> temp_buffer;
00130 SpriteData *temp_dst = (SpriteData *)temp_buffer.Allocate(memory);
00131 byte *dst = temp_dst->data;
00132
00133
00134 for (ZoomLevel i = ZOOM_LVL_BEGIN; i < ZOOM_LVL_END; i++) {
00135
00136 uint offset = dst - temp_dst->data;
00137 temp_dst->offset[i] = offset;
00138
00139
00140 int scaled_height = UnScaleByZoom(sprite->height, i);
00141 int scaled_width = UnScaleByZoom(sprite->width, i);
00142 int scaled_1 = ScaleByZoom(1, i);
00143
00144 for (int y = 0; y < scaled_height; y++) {
00145 uint trans = 0;
00146 uint pixels = 0;
00147 uint last_colour = 0;
00148 byte *count_dst = NULL;
00149
00150
00151 const SpriteLoader::CommonPixel *src = &sprite->data[ScaleByZoom(y, i) * sprite->width];
00152 const SpriteLoader::CommonPixel *src_end = &src[sprite->width];
00153
00154 for (int x = 0; x < scaled_width; x++) {
00155 uint colour = 0;
00156
00157
00158 for (int j = 0; j < scaled_1; j++) {
00159 if (src->m != 0) colour = src->m;
00160
00161 if (++src == src_end) break;
00162 }
00163
00164 if (last_colour == 0 || colour == 0 || pixels == 255) {
00165 if (count_dst != NULL) {
00166
00167 *count_dst = pixels;
00168 pixels = 0;
00169 count_dst = NULL;
00170 }
00171
00172 if (colour == 0) {
00173 last_colour = 0;
00174 trans++;
00175 continue;
00176 }
00177
00178 *dst = trans;
00179 dst++;
00180 trans = 0;
00181
00182 count_dst = dst;
00183 dst++;
00184 }
00185 last_colour = colour;
00186 pixels++;
00187 *dst = colour;
00188 dst++;
00189 }
00190
00191 if (count_dst != NULL) *count_dst = pixels;
00192
00193
00194 *dst = 0; dst++;
00195 *dst = 0; dst++;
00196 }
00197 }
00198
00199 uint size = dst - (byte *)temp_dst;
00200
00201
00202 assert(size < memory);
00203
00204
00205 Sprite *dest_sprite = (Sprite *)allocator(sizeof(*dest_sprite) + size);
00206
00207 dest_sprite->height = sprite->height;
00208 dest_sprite->width = sprite->width;
00209 dest_sprite->x_offs = sprite->x_offs;
00210 dest_sprite->y_offs = sprite->y_offs;
00211 memcpy(dest_sprite->data, temp_dst, size);
00212
00213 return dest_sprite;
00214 }