8bpp_optimized.cpp
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00002
00005 #include "../stdafx.h"
00006 #include "../zoom_func.h"
00007 #include "../core/alloc_func.hpp"
00008 #include "../core/math_func.hpp"
00009 #include "8bpp_optimized.hpp"
00010
00011 static FBlitter_8bppOptimized iFBlitter_8bppOptimized;
00012
00013 void Blitter_8bppOptimized::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom)
00014 {
00015
00016 const SpriteData *sprite_src = (const SpriteData *)bp->sprite;
00017 uint offset = sprite_src->offset[zoom];
00018
00019
00020 const uint8 *src = sprite_src->data + offset;
00021 uint8 *dst_line = (uint8 *)bp->dst + bp->top * bp->pitch + bp->left;
00022
00023
00024 for (int y = 0; y < bp->skip_top; y++) {
00025 for (;;) {
00026 uint trans = *src++;
00027 uint pixels = *src++;
00028 if (trans == 0 && pixels == 0) break;
00029 src += pixels;
00030 }
00031 }
00032
00033 const uint8 *src_next = src;
00034
00035 for (int y = 0; y < bp->height; y++) {
00036 uint8 *dst = dst_line;
00037 dst_line += bp->pitch;
00038
00039 uint skip_left = bp->skip_left;
00040 int width = bp->width;
00041
00042 for (;;) {
00043 src = src_next;
00044 uint trans = *src++;
00045 uint pixels = *src++;
00046 src_next = src + pixels;
00047 if (trans == 0 && pixels == 0) break;
00048 if (width <= 0) continue;
00049
00050 if (skip_left != 0) {
00051 if (skip_left < trans) {
00052 trans -= skip_left;
00053 skip_left = 0;
00054 } else {
00055 skip_left -= trans;
00056 trans = 0;
00057 }
00058 if (skip_left < pixels) {
00059 src += skip_left;
00060 pixels -= skip_left;
00061 skip_left = 0;
00062 } else {
00063 src += pixels;
00064 skip_left -= pixels;
00065 pixels = 0;
00066 }
00067 }
00068 if (skip_left != 0) continue;
00069
00070
00071 dst += trans;
00072 width -= trans;
00073 if (width <= 0 || pixels == 0) continue;
00074 pixels = min<uint>(pixels, (uint)width);
00075 width -= pixels;
00076
00077 switch (mode) {
00078 case BM_COLOUR_REMAP: {
00079 const uint8 *remap = bp->remap;
00080 do {
00081 uint m = remap[*src];
00082 if (m != 0) *dst = m;
00083 dst++; src++;
00084 } while (--pixels != 0);
00085 } break;
00086
00087 case BM_TRANSPARENT: {
00088 const uint8 *remap = bp->remap;
00089 src += pixels;
00090 do {
00091 *dst = remap[*dst];
00092 dst++;
00093 } while (--pixels != 0);
00094 } break;
00095
00096 default:
00097 memcpy(dst, src, pixels);
00098 dst += pixels; src += pixels;
00099 break;
00100 }
00101 }
00102 }
00103 }
00104
00105 Sprite *Blitter_8bppOptimized::Encode(SpriteLoader::Sprite *sprite, Blitter::AllocatorProc *allocator)
00106 {
00107
00108 uint memory = sizeof(SpriteData);
00109
00110 for (ZoomLevel i = ZOOM_LVL_BEGIN; i < ZOOM_LVL_END; i++) {
00111 memory += UnScaleByZoom(sprite->height, i) * UnScaleByZoom(sprite->width, i);
00112 }
00113
00114
00115 memory *= 5;
00116
00117
00118
00119
00120 static ReusableBuffer<byte> temp_buffer;
00121 SpriteData *temp_dst = (SpriteData *)temp_buffer.Allocate(memory);
00122 byte *dst = temp_dst->data;
00123
00124
00125 for (ZoomLevel i = ZOOM_LVL_BEGIN; i < ZOOM_LVL_END; i++) {
00126
00127 uint offset = dst - temp_dst->data;
00128 temp_dst->offset[i] = offset;
00129
00130
00131 int scaled_height = UnScaleByZoom(sprite->height, i);
00132 int scaled_width = UnScaleByZoom(sprite->width, i);
00133 int scaled_1 = ScaleByZoom(1, i);
00134
00135 for (int y = 0; y < scaled_height; y++) {
00136 uint trans = 0;
00137 uint pixels = 0;
00138 uint last_colour = 0;
00139 byte *count_dst = NULL;
00140
00141
00142 const SpriteLoader::CommonPixel *src = &sprite->data[ScaleByZoom(y, i) * sprite->width];
00143 const SpriteLoader::CommonPixel *src_end = &src[sprite->width];
00144
00145 for (int x = 0; x < scaled_width; x++) {
00146 uint colour = 0;
00147
00148
00149 for (int j = 0; j < scaled_1; j++) {
00150 if (src->m != 0) colour = src->m;
00151
00152 if (++src == src_end) break;
00153 }
00154
00155 if (last_colour == 0 || colour == 0 || pixels == 255) {
00156 if (count_dst != NULL) {
00157
00158 *count_dst = pixels;
00159 pixels = 0;
00160 count_dst = NULL;
00161 }
00162
00163 if (colour == 0) {
00164 last_colour = 0;
00165 trans++;
00166 continue;
00167 }
00168
00169 *dst = trans;
00170 dst++;
00171 trans = 0;
00172
00173 count_dst = dst;
00174 dst++;
00175 }
00176 last_colour = colour;
00177 pixels++;
00178 *dst = colour;
00179 dst++;
00180 }
00181
00182 if (count_dst != NULL) *count_dst = pixels;
00183
00184
00185 *dst = 0; dst++;
00186 *dst = 0; dst++;
00187 }
00188 }
00189
00190 uint size = dst - (byte *)temp_dst;
00191
00192
00193 assert(size < memory);
00194
00195
00196 Sprite *dest_sprite = (Sprite *)allocator(sizeof(*dest_sprite) + size);
00197
00198 dest_sprite->height = sprite->height;
00199 dest_sprite->width = sprite->width;
00200 dest_sprite->x_offs = sprite->x_offs;
00201 dest_sprite->y_offs = sprite->y_offs;
00202 memcpy(dest_sprite->data, temp_dst, size);
00203
00204 return dest_sprite;
00205 }