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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5098 | clevermous | 1 | /* |
| 2 | |||
| 3 | * Z buffer: 16 bits Z / 16 bits color |
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| 4 | * |
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| 5 | */ |
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| 6 | #include |
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| 7 | #include |
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| 8 | /*#include |
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| 9 | #include |
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| 10 | #include "zbuffer.h" |
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| 11 | |||
| 12 | ZBuffer *ZB_open(int xsize, int ysize, int mode, |
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| 13 | int nb_colors, |
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| 14 | unsigned char *color_indexes, |
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| 15 | int *color_table, |
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| 16 | void *frame_buffer) |
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| 17 | { |
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| 18 | ZBuffer *zb; |
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| 19 | int size; |
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| 20 | |||
| 21 | zb = gl_malloc(sizeof(ZBuffer)); |
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| 22 | if (zb == NULL) |
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| 23 | return NULL; |
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| 24 | |||
| 25 | zb->xsize = xsize; |
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| 26 | zb->ysize = ysize; |
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| 27 | zb->mode = mode; |
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| 28 | zb->linesize = (xsize * PSZB + 3) & ~3; |
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| 29 | |||
| 30 | switch (mode) { |
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| 31 | #ifdef TGL_FEATURE_8_BITS |
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| 32 | case ZB_MODE_INDEX: |
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| 33 | ZB_initDither(zb, nb_colors, color_indexes, color_table); |
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| 34 | break; |
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| 35 | #endif |
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| 36 | #ifdef TGL_FEATURE_32_BITS |
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| 37 | case ZB_MODE_RGBA: |
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| 38 | #endif |
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| 39 | #ifdef TGL_FEATURE_24_BITS |
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| 40 | case ZB_MODE_RGB24: |
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| 41 | #endif |
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| 42 | case ZB_MODE_5R6G5B: |
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| 43 | zb->nb_colors = 0; |
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| 44 | break; |
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| 45 | default: |
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| 46 | goto error; |
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| 47 | } |
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| 48 | |||
| 49 | size = zb->xsize * zb->ysize * sizeof(unsigned short); |
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| 50 | |||
| 51 | zb->zbuf = gl_malloc(size); |
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| 52 | if (zb->zbuf == NULL) |
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| 53 | goto error; |
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| 54 | |||
| 55 | zb->frame_buffer_allocated = 0; |
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| 56 | zb->pbuf = NULL; |
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| 57 | |||
| 58 | zb->current_texture = NULL; |
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| 59 | |||
| 60 | return zb; |
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| 61 | error: |
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| 62 | gl_free(zb); |
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| 63 | return NULL; |
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| 64 | } |
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| 65 | |||
| 66 | void ZB_close(ZBuffer * zb) |
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| 67 | { |
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| 68 | #ifdef TGL_FEATURE_8_BITS |
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| 69 | if (zb->mode == ZB_MODE_INDEX) |
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| 70 | ZB_closeDither(zb); |
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| 71 | #endif |
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| 72 | |||
| 73 | if (zb->frame_buffer_allocated) |
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| 74 | gl_free(zb->pbuf); |
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| 75 | |||
| 76 | gl_free(zb->zbuf); |
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| 77 | gl_free(zb); |
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| 78 | } |
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| 79 | |||
| 80 | void ZB_resize(ZBuffer * zb, void *frame_buffer, int xsize, int ysize) |
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| 81 | { |
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| 82 | int size; |
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| 83 | |||
| 84 | /* xsize must be a multiple of 4 */ |
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| 85 | xsize = xsize & ~3; |
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| 86 | |||
| 87 | zb->xsize = xsize; |
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| 88 | zb->ysize = ysize; |
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| 89 | zb->linesize = (xsize * PSZB + 3) & ~3; |
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| 90 | |||
| 91 | size = zb->xsize * zb->ysize * sizeof(unsigned short); |
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| 92 | |||
| 93 | gl_free(zb->zbuf); |
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| 94 | zb->zbuf = gl_malloc(size); |
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| 95 | |||
| 96 | if (zb->frame_buffer_allocated) |
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| 97 | gl_free(zb->pbuf); |
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| 98 | |||
| 99 | if (frame_buffer == NULL) { |
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| 100 | zb->pbuf = gl_malloc((zb->ysize+1) * (zb->linesize)); |
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| 101 | zb->frame_buffer_allocated = 1; |
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| 102 | } else { |
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| 103 | zb->pbuf = frame_buffer; |
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| 104 | zb->frame_buffer_allocated = 0; |
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| 105 | } |
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| 106 | } |
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| 107 | |||
| 108 | static void ZB_copyBuffer(ZBuffer * zb, |
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| 109 | void *buf, |
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| 110 | int linesize) |
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| 111 | { |
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| 112 | unsigned char *p1; |
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| 113 | PIXEL *q; |
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| 114 | int y, n; |
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| 115 | |||
| 116 | q = zb->pbuf; |
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| 117 | p1 = buf; |
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| 118 | n = zb->xsize * PSZB; |
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| 119 | for (y = 0; y < zb->ysize; y++) { |
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| 120 | memcpy(p1, q, n); |
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| 121 | p1 += linesize; |
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| 122 | q = (PIXEL *) ((char *) q + zb->linesize); |
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| 123 | } |
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| 124 | } |
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| 125 | |||
| 126 | #if TGL_FEATURE_RENDER_BITS == 16 |
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| 127 | |||
| 128 | /* 32 bpp copy */ |
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| 129 | |||
| 130 | #ifdef TGL_FEATURE_32_BITS |
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| 131 | |||
| 132 | #define RGB16_TO_RGB32(p0,p1,v)\ |
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| 133 | {\ |
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| 134 | unsigned int g,b,gb;\ |
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| 135 | g = (v & 0x07E007E0) << 5;\ |
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| 136 | b = (v & 0x001F001F) << 3;\ |
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| 137 | gb = g | b;\ |
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| 138 | p0 = (gb & 0x0000FFFF) | ((v & 0x0000F800) << 8);\ |
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| 139 | p1 = (gb >> 16) | ((v & 0xF8000000) >> 8);\ |
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| 140 | } |
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| 141 | |||
| 142 | static void ZB_copyFrameBufferRGB32(ZBuffer * zb, |
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| 143 | void *buf, |
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| 144 | int linesize) |
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| 145 | { |
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| 146 | unsigned short *q; |
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| 147 | unsigned int *p, *p1, v, w0, w1; |
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| 148 | int y, n; |
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| 149 | |||
| 150 | q = zb->pbuf; |
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| 151 | p1 = (unsigned int *) buf; |
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| 152 | |||
| 153 | for (y = 0; y < zb->ysize; y++) { |
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| 154 | p = p1; |
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| 155 | n = zb->xsize >> 2; |
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| 156 | do { |
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| 157 | v = *(unsigned int *) q; |
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| 158 | #if BYTE_ORDER == BIG_ENDIAN |
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| 159 | RGB16_TO_RGB32(w1, w0, v); |
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| 160 | #else |
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| 161 | RGB16_TO_RGB32(w0, w1, v); |
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| 162 | #endif |
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| 163 | p[0] = w0; |
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| 164 | p[1] = w1; |
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| 165 | |||
| 166 | v = *(unsigned int *) (q + 2); |
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| 167 | #if BYTE_ORDER == BIG_ENDIAN |
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| 168 | RGB16_TO_RGB32(w1, w0, v); |
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| 169 | #else |
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| 170 | RGB16_TO_RGB32(w0, w1, v); |
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| 171 | #endif |
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| 172 | p[2] = w0; |
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| 173 | p[3] = w1; |
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| 174 | |||
| 175 | q += 4; |
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| 176 | p += 4; |
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| 177 | } while (--n > 0); |
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| 178 | |||
| 179 | p1 += linesize; |
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| 180 | } |
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| 181 | } |
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| 182 | |||
| 183 | #endif |
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| 184 | |||
| 185 | /* 24 bit packed pixel handling */ |
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| 186 | |||
| 187 | #ifdef TGL_FEATURE_24_BITS |
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| 188 | |||
| 189 | /* order: RGBR GBRG BRGB */ |
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| 190 | |||
| 191 | /* XXX: packed pixel 24 bit support not tested */ |
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| 192 | /* XXX: big endian case not optimised */ |
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| 193 | |||
| 194 | #if BYTE_ORDER == BIG_ENDIAN |
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| 195 | |||
| 196 | #define RGB16_TO_RGB24(p0,p1,p2,v1,v2)\ |
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| 197 | {\ |
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| 198 | unsigned int r1,g1,b1,gb1,g2,b2,gb2;\ |
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| 199 | v1 = (v1 << 16) | (v1 >> 16);\ |
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| 200 | v2 = (v2 << 16) | (v2 >> 16);\ |
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| 201 | r1 = (v1 & 0xF800F800);\ |
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| 202 | g1 = (v1 & 0x07E007E0) << 5;\ |
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| 203 | b1 = (v1 & 0x001F001F) << 3;\ |
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| 204 | gb1 = g1 | b1;\ |
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| 205 | p0 = ((gb1 & 0x0000FFFF) << 8) | (r1 << 16) | (r1 >> 24);\ |
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| 206 | g2 = (v2 & 0x07E007E0) << 5;\ |
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| 207 | b2 = (v2 & 0x001F001F) << 3;\ |
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| 208 | gb2 = g2 | b2;\ |
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| 209 | p1 = (gb1 & 0xFFFF0000) | (v2 & 0xF800) | ((gb2 >> 8) & 0xff);\ |
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| 210 | p2 = (gb2 << 24) | ((v2 & 0xF8000000) >> 8) | (gb2 >> 16);\ |
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| 211 | } |
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| 212 | |||
| 213 | #else |
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| 214 | |||
| 215 | #define RGB16_TO_RGB24(p0,p1,p2,v1,v2)\ |
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| 216 | {\ |
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| 217 | unsigned int r1,g1,b1,gb1,g2,b2,gb2;\ |
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| 218 | r1 = (v1 & 0xF800F800);\ |
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| 219 | g1 = (v1 & 0x07E007E0) << 5;\ |
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| 220 | b1 = (v1 & 0x001F001F) << 3;\ |
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| 221 | gb1 = g1 | b1;\ |
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| 222 | p0 = ((gb1 & 0x0000FFFF) << 8) | (r1 << 16) | (r1 >> 24);\ |
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| 223 | g2 = (v2 & 0x07E007E0) << 5;\ |
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| 224 | b2 = (v2 & 0x001F001F) << 3;\ |
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| 225 | gb2 = g2 | b2;\ |
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| 226 | p1 = (gb1 & 0xFFFF0000) | (v2 & 0xF800) | ((gb2 >> 8) & 0xff);\ |
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| 227 | p2 = (gb2 << 24) | ((v2 & 0xF8000000) >> 8) | (gb2 >> 16);\ |
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| 228 | } |
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| 229 | |||
| 230 | #endif |
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| 231 | |||
| 232 | static void ZB_copyFrameBufferRGB24(ZBuffer * zb, |
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| 233 | void *buf, |
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| 234 | int linesize) |
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| 235 | { |
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| 236 | unsigned short *q; |
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| 237 | unsigned int *p, *p1, w0, w1, w2, v0, v1; |
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| 238 | int y, n; |
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| 239 | |||
| 240 | q = zb->pbuf; |
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| 241 | p1 = (unsigned int *) buf; |
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| 242 | linesize = linesize * 3; |
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| 243 | |||
| 244 | for (y = 0; y < zb->ysize; y++) { |
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| 245 | p = p1; |
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| 246 | n = zb->xsize >> 2; |
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| 247 | do { |
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| 248 | v0 = *(unsigned int *) q; |
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| 249 | v1 = *(unsigned int *) (q + 2); |
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| 250 | RGB16_TO_RGB24(w0, w1, w2, v0, v1); |
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| 251 | p[0] = w0; |
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| 252 | p[1] = w1; |
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| 253 | p[2] = w2; |
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| 254 | |||
| 255 | q += 4; |
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| 256 | p += 3; |
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| 257 | } while (--n > 0); |
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| 258 | |||
| 259 | (char *) p1 += linesize; |
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| 260 | } |
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| 261 | } |
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| 262 | |||
| 263 | #endif |
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| 264 | |||
| 265 | void ZB_copyFrameBuffer(ZBuffer * zb, void *buf, |
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| 266 | int linesize) |
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| 267 | { |
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| 268 | switch (zb->mode) { |
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| 269 | #ifdef TGL_FEATURE_8_BITS |
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| 270 | case ZB_MODE_INDEX: |
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| 271 | ZB_ditherFrameBuffer(zb, buf, linesize >> 1); |
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| 272 | break; |
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| 273 | #endif |
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| 274 | #ifdef TGL_FEATURE_16_BITS |
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| 275 | case ZB_MODE_5R6G5B: |
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| 276 | ZB_copyBuffer(zb, buf, linesize); |
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| 277 | break; |
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| 278 | #endif |
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| 279 | #ifdef TGL_FEATURE_32_BITS |
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| 280 | case ZB_MODE_RGBA: |
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| 281 | ZB_copyFrameBufferRGB32(zb, buf, linesize >> 1); |
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| 282 | break; |
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| 283 | #endif |
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| 284 | #ifdef TGL_FEATURE_24_BITS |
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| 285 | case ZB_MODE_RGB24: |
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| 286 | ZB_copyFrameBufferRGB24(zb, buf, linesize >> 1); |
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| 287 | break; |
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| 288 | #endif |
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| 289 | default: |
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| 290 | assert(0); |
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| 291 | } |
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| 292 | } |
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| 293 | |||
| 294 | #endif /* TGL_FEATURE_RENDER_BITS == 16 */ |
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| 295 | |||
| 296 | #if TGL_FEATURE_RENDER_BITS == 24 |
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| 297 | |||
| 298 | #define RGB24_TO_RGB16(r, g, b) \ |
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| 299 | ((((r) >> 3) << 11) | (((g) >> 2) << 5) | ((b) >> 3)) |
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| 300 | |||
| 301 | /* XXX: not optimized */ |
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| 302 | static void ZB_copyFrameBuffer5R6G5B(ZBuffer * zb, |
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| 303 | void *buf, int linesize) |
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| 304 | { |
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| 305 | PIXEL *q; |
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| 306 | unsigned short *p, *p1; |
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| 307 | int y, n; |
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| 308 | |||
| 309 | q = zb->pbuf; |
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| 310 | p1 = (unsigned short *) buf; |
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| 311 | |||
| 312 | for (y = 0; y < zb->ysize; y++) { |
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| 313 | p = p1; |
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| 314 | n = zb->xsize >> 2; |
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| 315 | do { |
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| 316 | p[0] = RGB24_TO_RGB16(q[0], q[1], q[2]); |
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| 317 | p[1] = RGB24_TO_RGB16(q[3], q[4], q[5]); |
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| 318 | p[2] = RGB24_TO_RGB16(q[6], q[7], q[8]); |
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| 319 | p[3] = RGB24_TO_RGB16(q[9], q[10], q[11]); |
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| 320 | q = (PIXEL *)((char *)q + 4 * PSZB); |
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| 321 | p += 4; |
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| 322 | } while (--n > 0); |
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| 323 | p1 = (unsigned short *)((char *)p1 + linesize); |
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| 324 | } |
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| 325 | } |
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| 326 | |||
| 327 | void ZB_copyFrameBuffer(ZBuffer * zb, void *buf, |
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| 328 | int linesize) |
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| 329 | { |
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| 330 | switch (zb->mode) { |
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| 331 | #ifdef TGL_FEATURE_16_BITS |
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| 332 | case ZB_MODE_5R6G5B: |
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| 333 | ZB_copyFrameBuffer5R6G5B(zb, buf, linesize); |
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| 334 | break; |
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| 335 | #endif |
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| 336 | #ifdef TGL_FEATURE_24_BITS |
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| 337 | case ZB_MODE_RGB24: |
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| 338 | ZB_copyBuffer(zb, buf, linesize); |
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| 339 | break; |
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| 340 | #endif |
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| 341 | default: |
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| 342 | assert(0); |
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| 343 | } |
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| 344 | } |
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| 345 | |||
| 346 | #endif /* TGL_FEATURE_RENDER_BITS == 24 */ |
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| 347 | |||
| 348 | #if TGL_FEATURE_RENDER_BITS == 32 |
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| 349 | |||
| 350 | #define RGB32_TO_RGB16(v) \ |
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| 351 | (((v >> 8) & 0xf800) | (((v) >> 5) & 0x07e0) | (((v) & 0xff) >> 3)) |
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| 352 | |||
| 353 | /* XXX: not optimized */ |
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| 354 | static void ZB_copyFrameBuffer5R6G5B(ZBuffer * zb, |
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| 355 | void *buf, int linesize) |
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| 356 | { |
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| 357 | PIXEL *q; |
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| 358 | unsigned short *p, *p1; |
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| 359 | int y, n; |
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| 360 | |||
| 361 | q = zb->pbuf; |
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| 362 | p1 = (unsigned short *) buf; |
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| 363 | |||
| 364 | for (y = 0; y < zb->ysize; y++) { |
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| 365 | p = p1; |
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| 366 | n = zb->xsize >> 2; |
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| 367 | do { |
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| 368 | p[0] = RGB32_TO_RGB16(q[0]); |
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| 369 | p[1] = RGB32_TO_RGB16(q[1]); |
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| 370 | p[2] = RGB32_TO_RGB16(q[2]); |
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| 371 | p[3] = RGB32_TO_RGB16(q[3]); |
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| 372 | q += 4; |
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| 373 | p += 4; |
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| 374 | } while (--n > 0); |
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| 375 | p1 = (unsigned short *)((char *)p1 + linesize); |
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| 376 | } |
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| 377 | } |
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| 378 | |||
| 379 | void ZB_copyFrameBuffer(ZBuffer * zb, void *buf, |
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| 380 | int linesize) |
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| 381 | { |
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| 382 | switch (zb->mode) { |
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| 383 | #ifdef TGL_FEATURE_16_BITS |
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| 384 | case ZB_MODE_5R6G5B: |
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| 385 | ZB_copyFrameBuffer5R6G5B(zb, buf, linesize); |
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| 386 | break; |
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| 387 | #endif |
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| 388 | #ifdef TGL_FEATURE_32_BITS |
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| 389 | case ZB_MODE_RGBA: |
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| 390 | ZB_copyBuffer(zb, buf, linesize); |
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| 391 | break; |
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| 392 | #endif |
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| 393 | default: |
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| 394 | assert(0); |
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| 395 | } |
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| 396 | } |
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| 397 | |||
| 398 | #endif /* TGL_FEATURE_RENDER_BITS == 32 */ |
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| 399 | |||
| 400 | |||
| 401 | /* |
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| 402 | * adr must be aligned on an 'int' |
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| 403 | */ |
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| 404 | void memset_s(void *adr, int val, int count) |
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| 405 | { |
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| 406 | int i, n, v; |
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| 407 | unsigned int *p; |
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| 408 | unsigned short *q; |
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| 409 | |||
| 410 | p = adr; |
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| 411 | v = val | (val << 16); |
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| 412 | |||
| 413 | n = count >> 3; |
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| 414 | for (i = 0; i < n; i++) { |
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| 415 | p[0] = v; |
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| 416 | p[1] = v; |
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| 417 | p[2] = v; |
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| 418 | p[3] = v; |
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| 419 | p += 4; |
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| 420 | } |
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| 421 | |||
| 422 | q = (unsigned short *) p; |
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| 423 | n = count & 7; |
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| 424 | for (i = 0; i < n; i++) |
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| 425 | *q++ = val; |
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| 426 | } |
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| 427 | |||
| 428 | void memset_l(void *adr, int val, int count) |
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| 429 | { |
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| 430 | int i, n, v; |
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| 431 | unsigned int *p; |
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| 432 | |||
| 433 | p = adr; |
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| 434 | v = val; |
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| 435 | n = count >> 2; |
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| 436 | for (i = 0; i < n; i++) { |
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| 437 | p[0] = v; |
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| 438 | p[1] = v; |
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| 439 | p[2] = v; |
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| 440 | p[3] = v; |
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| 441 | p += 4; |
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| 442 | } |
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| 443 | |||
| 444 | n = count & 3; |
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| 445 | for (i = 0; i < n; i++) |
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| 446 | *p++ = val; |
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| 447 | } |
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| 448 | |||
| 449 | /* count must be a multiple of 4 and >= 4 */ |
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| 450 | void memset_RGB24(void *adr,int r, int v, int b,long count) |
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| 451 | { |
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| 452 | long i, n; |
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| 453 | register long v1,v2,v3,*pt=(long *)(adr); |
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| 454 | unsigned char *p,R=(unsigned char)r,V=(unsigned char)v,B=(unsigned char)b; |
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| 455 | |||
| 456 | p=(unsigned char *)adr; |
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| 457 | *p++=R; |
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| 458 | *p++=V; |
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| 459 | *p++=B; |
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| 460 | *p++=R; |
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| 461 | *p++=V; |
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| 462 | *p++=B; |
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| 463 | *p++=R; |
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| 464 | *p++=V; |
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| 465 | *p++=B; |
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| 466 | *p++=R; |
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| 467 | *p++=V; |
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| 468 | *p++=B; |
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| 469 | v1=*pt++; |
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| 470 | v2=*pt++; |
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| 471 | v3=*pt++; |
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| 472 | n = count >> 2; |
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| 473 | for(i=1;i |
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| 474 | *pt++=v1; |
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| 475 | *pt++=v2; |
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| 476 | *pt++=v3; |
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| 477 | } |
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| 478 | } |
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| 479 | |||
| 480 | void ZB_clear(ZBuffer * zb, int clear_z, int z, |
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| 481 | int clear_color, int r, int g, int b) |
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| 482 | { |
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| 483 | #if TGL_FEATURE_RENDER_BITS != 24 |
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| 484 | int color; |
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| 485 | #endif |
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| 486 | int y; |
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| 487 | PIXEL *pp; |
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| 488 | |||
| 489 | if (clear_z) { |
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| 490 | memset_s(zb->zbuf, z, zb->xsize * zb->ysize); |
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| 491 | } |
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| 492 | if (clear_color) { |
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| 493 | pp = zb->pbuf; |
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| 494 | for (y = 0; y < zb->ysize; y++) { |
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| 495 | #if TGL_FEATURE_RENDER_BITS == 15 || TGL_FEATURE_RENDER_BITS == 16 |
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| 496 | color = RGB_TO_PIXEL(r, g, b); |
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| 497 | memset_s(pp, color, zb->xsize); |
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| 498 | #elif TGL_FEATURE_RENDER_BITS == 32 |
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| 499 | color = RGB_TO_PIXEL(r, g, b); |
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| 500 | memset_l(pp, color, zb->xsize); |
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| 501 | #elif TGL_FEATURE_RENDER_BITS == 24 |
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| 502 | memset_RGB24(pp,r>>8,g>>8,b>>8,zb->xsize); |
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| 503 | #else |
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| 504 | #error TODO |
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| 505 | #endif |
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| 506 | pp = (PIXEL *) ((char *) pp + zb->linesize); |
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| 507 | } |
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| 508 | } |
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| 509 | } |