hw/pxa2xx_template.h

   1 /*
   2  * Intel XScale PXA255/270 LCDC emulation.
   3  *
   4  * Copyright (c) 2006 Openedhand Ltd.
   5  * Written by Andrzej Zaborowski <balrog@zabor.org>
   6  *
   7  * This code is licensed under the GPLv2.
   8  *
   9  * Framebuffer format conversion routines.
  10  */
  11
  12 # define SKIP_PIXEL(to)         to += deststep
  13 #if BITS == 8
  14 # define COPY_PIXEL(to, from)   *to = from; SKIP_PIXEL(to)
  15 #elif BITS == 15 || BITS == 16
  16 # define COPY_PIXEL(to, from)   *(uint16_t *) to = from; SKIP_PIXEL(to)
  17 #elif BITS == 24
  18 # define COPY_PIXEL(to, from)   \
  19         *(uint16_t *) to = from; *(to + 2) = (from) >> 16; SKIP_PIXEL(to)
  20 #elif BITS == 32
  21 # define COPY_PIXEL(to, from)   *(uint32_t *) to = from; SKIP_PIXEL(to)
  22 #else
  23 # error unknown bit depth
  24 #endif
  25
  26 #ifdef WORDS_BIGENDIAN
  27 # define SWAP_WORDS     1
  28 #endif
  29
  30 #define FN_2(x)         FN(x + 1) FN(x)
  31 #define FN_4(x)         FN_2(x + 2) FN_2(x)
  32
  33 static void glue(pxa2xx_draw_line2_, BITS)(uint32_t *palette,
  34                 uint8_t *dest, const uint8_t *src, int width, int deststep)
  35 {
  36     uint32_t data;
  37     while (width > 0) {
  38         data = *(uint32_t *) src;
  39 #define FN(x)           COPY_PIXEL(dest, palette[(data >> ((x) * 2)) & 3]);
  40 #ifdef SWAP_WORDS
  41         FN_4(12)
  42         FN_4(8)
  43         FN_4(4)
  44         FN_4(0)
  45 #else
  46         FN_4(0)
  47         FN_4(4)
  48         FN_4(8)
  49         FN_4(12)
  50 #endif
  51 #undef FN
  52         width -= 16;
  53         src += 4;
  54     }
  55 }
  56
  57 static void glue(pxa2xx_draw_line4_, BITS)(uint32_t *palette,
  58                 uint8_t *dest, const uint8_t *src, int width, int deststep)
  59 {
  60     uint32_t data;
  61     while (width > 0) {
  62         data = *(uint32_t *) src;
  63 #define FN(x)           COPY_PIXEL(dest, palette[(data >> ((x) * 4)) & 0xf]);
  64 #ifdef SWAP_WORDS
  65         FN_2(6)
  66         FN_2(4)
  67         FN_2(2)
  68         FN_2(0)
  69 #else
  70         FN_2(0)
  71         FN_2(2)
  72         FN_2(4)
  73         FN_2(6)
  74 #endif
  75 #undef FN
  76         width -= 8;
  77         src += 4;
  78     }
  79 }
  80
  81 static void glue(pxa2xx_draw_line8_, BITS)(uint32_t *palette,
  82                 uint8_t *dest, const uint8_t *src, int width, int deststep)
  83 {
  84     uint32_t data;
  85     while (width > 0) {
  86         data = *(uint32_t *) src;
  87 #define FN(x)           COPY_PIXEL(dest, palette[(data >> (x)) & 0xff]);
  88 #ifdef SWAP_WORDS
  89         FN(24)
  90         FN(16)
  91         FN(8)
  92         FN(0)
  93 #else
  94         FN(0)
  95         FN(8)
  96         FN(16)
  97         FN(24)
  98 #endif
  99 #undef FN
 100         width -= 4;
 101         src += 4;
 102     }
 103 }
 104
 105 static void glue(pxa2xx_draw_line16_, BITS)(uint32_t *palette,
 106                 uint8_t *dest, const uint8_t *src, int width, int deststep)
 107 {
 108     uint32_t data;
 109     unsigned int r, g, b;
 110     while (width > 0) {
 111         data = *(uint32_t *) src;
 112 #ifdef SWAP_WORDS
 113         data = bswap32(data);
 114 #endif
 115         b = (data & 0x1f) << 3;
 116         data >>= 5;
 117         g = (data & 0x3f) << 2;
 118         data >>= 6;
 119         r = (data & 0x1f) << 3;
 120         data >>= 5;
 121         COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
 122         b = (data & 0x1f) << 3;
 123         data >>= 5;
 124         g = (data & 0x3f) << 2;
 125         data >>= 6;
 126         r = (data & 0x1f) << 3;
 127         COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
 128         width -= 2;
 129         src += 4;
 130     }
 131 }
 132
 133 static void glue(pxa2xx_draw_line16t_, BITS)(uint32_t *palette,
 134                 uint8_t *dest, const uint8_t *src, int width, int deststep)
 135 {
 136     uint32_t data;
 137     unsigned int r, g, b;
 138     while (width > 0) {
 139         data = *(uint32_t *) src;
 140 #ifdef SWAP_WORDS
 141         data = bswap32(data);
 142 #endif
 143         b = (data & 0x1f) << 3;
 144         data >>= 5;
 145         g = (data & 0x1f) << 3;
 146         data >>= 5;
 147         r = (data & 0x1f) << 3;
 148         data >>= 5;
 149         if (data & 1)
 150             SKIP_PIXEL(dest);
 151         else
 152             COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
 153         data >>= 1;
 154         b = (data & 0x1f) << 3;
 155         data >>= 5;
 156         g = (data & 0x1f) << 3;
 157         data >>= 5;
 158         r = (data & 0x1f) << 3;
 159         if (data & 1)
 160             SKIP_PIXEL(dest);
 161         else
 162             COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
 163         width -= 2;
 164         src += 4;
 165     }
 166 }
 167
 168 static void glue(pxa2xx_draw_line18_, BITS)(uint32_t *palette,
 169                 uint8_t *dest, const uint8_t *src, int width, int deststep)
 170 {
 171     uint32_t data;
 172     unsigned int r, g, b;
 173     while (width > 0) {
 174         data = *(uint32_t *) src;
 175 #ifdef SWAP_WORDS
 176         data = bswap32(data);
 177 #endif
 178         b = (data & 0x3f) << 2;
 179         data >>= 6;
 180         g = (data & 0x3f) << 2;
 181         data >>= 6;
 182         r = (data & 0x3f) << 2;
 183         COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
 184         width -= 1;
 185         src += 4;
 186     }
 187 }
 188
 189 /* The wicked packed format */
 190 static void glue(pxa2xx_draw_line18p_, BITS)(uint32_t *palette,
 191                 uint8_t *dest, const uint8_t *src, int width, int deststep)
 192 {
 193     uint32_t data[3];
 194     unsigned int r, g, b;
 195     while (width > 0) {
 196         data[0] = *(uint32_t *) src;
 197         src += 4;
 198         data[1] = *(uint32_t *) src;
 199         src += 4;
 200         data[2] = *(uint32_t *) src;
 201         src += 4;
 202 #ifdef SWAP_WORDS
 203         data[0] = bswap32(data[0]);
 204         data[1] = bswap32(data[1]);
 205         data[2] = bswap32(data[2]);
 206 #endif
 207         b = (data[0] & 0x3f) << 2;
 208         data[0] >>= 6;
 209         g = (data[0] & 0x3f) << 2;
 210         data[0] >>= 6;
 211         r = (data[0] & 0x3f) << 2;
 212         data[0] >>= 12;
 213         COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
 214         b = (data[0] & 0x3f) << 2;
 215         data[0] >>= 6;
 216         g = ((data[1] & 0xf) << 4) | (data[0] << 2);
 217         data[1] >>= 4;
 218         r = (data[1] & 0x3f) << 2;
 219         data[1] >>= 12;
 220         COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
 221         b = (data[1] & 0x3f) << 2;
 222         data[1] >>= 6;
 223         g = (data[1] & 0x3f) << 2;
 224         data[1] >>= 6;
 225         r = ((data[2] & 0x3) << 6) | (data[1] << 2);
 226         data[2] >>= 8;
 227         COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
 228         b = (data[2] & 0x3f) << 2;
 229         data[2] >>= 6;
 230         g = (data[2] & 0x3f) << 2;
 231         data[2] >>= 6;
 232         r = data[2] << 2;
 233         COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
 234         width -= 4;
 235     }
 236 }
 237
 238 static void glue(pxa2xx_draw_line19_, BITS)(uint32_t *palette,
 239                 uint8_t *dest, const uint8_t *src, int width, int deststep)
 240 {
 241     uint32_t data;
 242     unsigned int r, g, b;
 243     while (width > 0) {
 244         data = *(uint32_t *) src;
 245 #ifdef SWAP_WORDS
 246         data = bswap32(data);
 247 #endif
 248         b = (data & 0x3f) << 2;
 249         data >>= 6;
 250         g = (data & 0x3f) << 2;
 251         data >>= 6;
 252         r = (data & 0x3f) << 2;
 253         data >>= 6;
 254         if (data & 1)
 255             SKIP_PIXEL(dest);
 256         else
 257             COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
 258         width -= 1;
 259         src += 4;
 260     }
 261 }
 262
 263 /* The wicked packed format */
 264 static void glue(pxa2xx_draw_line19p_, BITS)(uint32_t *palette,
 265                 uint8_t *dest, const uint8_t *src, int width, int deststep)
 266 {
 267     uint32_t data[3];
 268     unsigned int r, g, b;
 269     while (width > 0) {
 270         data[0] = *(uint32_t *) src;
 271         src += 4;
 272         data[1] = *(uint32_t *) src;
 273         src += 4;
 274         data[2] = *(uint32_t *) src;
 275         src += 4;
 276 # ifdef SWAP_WORDS
 277         data[0] = bswap32(data[0]);
 278         data[1] = bswap32(data[1]);
 279         data[2] = bswap32(data[2]);
 280 # endif
 281         b = (data[0] & 0x3f) << 2;
 282         data[0] >>= 6;
 283         g = (data[0] & 0x3f) << 2;
 284         data[0] >>= 6;
 285         r = (data[0] & 0x3f) << 2;
 286         data[0] >>= 6;
 287         if (data[0] & 1)
 288             SKIP_PIXEL(dest);
 289         else
 290             COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
 291         data[0] >>= 6;
 292         b = (data[0] & 0x3f) << 2;
 293         data[0] >>= 6;
 294         g = ((data[1] & 0xf) << 4) | (data[0] << 2);
 295         data[1] >>= 4;
 296         r = (data[1] & 0x3f) << 2;
 297         data[1] >>= 6;
 298         if (data[1] & 1)
 299             SKIP_PIXEL(dest);
 300         else
 301             COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
 302         data[1] >>= 6;
 303         b = (data[1] & 0x3f) << 2;
 304         data[1] >>= 6;
 305         g = (data[1] & 0x3f) << 2;
 306         data[1] >>= 6;
 307         r = ((data[2] & 0x3) << 6) | (data[1] << 2);
 308         data[2] >>= 2;
 309         if (data[2] & 1)
 310             SKIP_PIXEL(dest);
 311         else
 312             COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
 313         data[2] >>= 6;
 314         b = (data[2] & 0x3f) << 2;
 315         data[2] >>= 6;
 316         g = (data[2] & 0x3f) << 2;
 317         data[2] >>= 6;
 318         r = data[2] << 2;
 319         data[2] >>= 6;
 320         if (data[2] & 1)
 321             SKIP_PIXEL(dest);
 322         else
 323             COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
 324         width -= 4;
 325     }
 326 }
 327
 328 static void glue(pxa2xx_draw_line24_, BITS)(uint32_t *palette,
 329                 uint8_t *dest, const uint8_t *src, int width, int deststep)
 330 {
 331     uint32_t data;
 332     unsigned int r, g, b;
 333     while (width > 0) {
 334         data = *(uint32_t *) src;
 335 #ifdef SWAP_WORDS
 336         data = bswap32(data);
 337 #endif
 338         b = data & 0xff;
 339         data >>= 8;
 340         g = data & 0xff;
 341         data >>= 8;
 342         r = data & 0xff;
 343         COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
 344         width -= 1;
 345         src += 4;
 346     }
 347 }
 348
 349 static void glue(pxa2xx_draw_line24t_, BITS)(uint32_t *palette,
 350                 uint8_t *dest, const uint8_t *src, int width, int deststep)
 351 {
 352     uint32_t data;
 353     unsigned int r, g, b;
 354     while (width > 0) {
 355         data = *(uint32_t *) src;
 356 #ifdef SWAP_WORDS
 357         data = bswap32(data);
 358 #endif
 359         b = (data & 0x7f) << 1;
 360         data >>= 7;
 361         g = data & 0xff;
 362         data >>= 8;
 363         r = data & 0xff;
 364         data >>= 8;
 365         if (data & 1)
 366             SKIP_PIXEL(dest);
 367         else
 368             COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
 369         width -= 1;
 370         src += 4;
 371     }
 372 }
 373
 374 static void glue(pxa2xx_draw_line25_, BITS)(uint32_t *palette,
 375                 uint8_t *dest, const uint8_t *src, int width, int deststep)
 376 {
 377     uint32_t data;
 378     unsigned int r, g, b;
 379     while (width > 0) {
 380         data = *(uint32_t *) src;
 381 #ifdef SWAP_WORDS
 382         data = bswap32(data);
 383 #endif
 384         b = data & 0xff;
 385         data >>= 8;
 386         g = data & 0xff;
 387         data >>= 8;
 388         r = data & 0xff;
 389         data >>= 8;
 390         if (data & 1)
 391             SKIP_PIXEL(dest);
 392         else
 393             COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
 394         width -= 1;
 395         src += 4;
 396     }
 397 }
 398
 399 /* Overlay planes disabled, no transparency */
 400 static drawfn glue(pxa2xx_draw_fn_, BITS)[16] =
 401 {
 402     [0 ... 0xf]       = 0,
 403     [pxa_lcdc_2bpp]   = glue(pxa2xx_draw_line2_, BITS),
 404     [pxa_lcdc_4bpp]   = glue(pxa2xx_draw_line4_, BITS),
 405     [pxa_lcdc_8bpp]   = glue(pxa2xx_draw_line8_, BITS),
 406     [pxa_lcdc_16bpp]  = glue(pxa2xx_draw_line16_, BITS),
 407     [pxa_lcdc_18bpp]  = glue(pxa2xx_draw_line18_, BITS),
 408     [pxa_lcdc_18pbpp] = glue(pxa2xx_draw_line18p_, BITS),
 409     [pxa_lcdc_24bpp]  = glue(pxa2xx_draw_line24_, BITS),
 410 };
 411
 412 /* Overlay planes enabled, transparency used */
 413 static drawfn glue(glue(pxa2xx_draw_fn_, BITS), t)[16] =
 414 {
 415     [0 ... 0xf]       = 0,
 416     [pxa_lcdc_4bpp]   = glue(pxa2xx_draw_line4_, BITS),
 417     [pxa_lcdc_8bpp]   = glue(pxa2xx_draw_line8_, BITS),
 418     [pxa_lcdc_16bpp]  = glue(pxa2xx_draw_line16t_, BITS),
 419     [pxa_lcdc_19bpp]  = glue(pxa2xx_draw_line19_, BITS),
 420     [pxa_lcdc_19pbpp] = glue(pxa2xx_draw_line19p_, BITS),
 421     [pxa_lcdc_24bpp]  = glue(pxa2xx_draw_line24t_, BITS),
 422     [pxa_lcdc_25bpp]  = glue(pxa2xx_draw_line25_, BITS),
 423 };
 424
 425 #undef BITS
 426 #undef COPY_PIXEL
 427 #undef SKIP_PIXEL
 428
 429 #ifdef SWAP_WORDS
 430 # undef SWAP_WORDS
 431 #endif