uisimulator/sdl/lcd-bitmap.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2006 Dan Everton
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #include "debug.h"
  23 #include "uisdl.h"
  24 #include "lcd-sdl.h"
  25 #include "screendump.h"
  26
  27 SDL_Surface* lcd_surface;
  28
  29 #if LCD_DEPTH <= 8
  30 #ifdef HAVE_BACKLIGHT
  31 SDL_Color lcd_bl_color_dark    = {RED_CMP(LCD_BL_DARKCOLOR),
  32                                   GREEN_CMP(LCD_BL_DARKCOLOR),
  33                                   BLUE_CMP(LCD_BL_DARKCOLOR), 0};
  34 SDL_Color lcd_bl_color_bright  = {RED_CMP(LCD_BL_BRIGHTCOLOR),
  35                                   GREEN_CMP(LCD_BL_BRIGHTCOLOR),
  36                                   BLUE_CMP(LCD_BL_BRIGHTCOLOR), 0};
  37 #ifdef HAVE_LCD_SPLIT
  38 SDL_Color lcd_bl_color2_dark   = {RED_CMP(LCD_BL_DARKCOLOR_2),
  39                                   GREEN_CMP(LCD_BL_DARKCOLOR_2),
  40                                   BLUE_CMP(LCD_BL_DARKCOLOR_2), 0};
  41 SDL_Color lcd_bl_color2_bright = {RED_CMP(LCD_BL_BRIGHTCOLOR_2),
  42                                   GREEN_CMP(LCD_BL_BRIGHTCOLOR_2),
  43                                   BLUE_CMP(LCD_BL_BRIGHTCOLOR_2), 0};
  44 #endif
  45 #endif /* HAVE_BACKLIGHT */
  46 SDL_Color lcd_color_dark    = {RED_CMP(LCD_DARKCOLOR),
  47                                GREEN_CMP(LCD_DARKCOLOR),
  48                                BLUE_CMP(LCD_DARKCOLOR), 0};
  49 SDL_Color lcd_color_bright  = {RED_CMP(LCD_BRIGHTCOLOR),
  50                                GREEN_CMP(LCD_BRIGHTCOLOR),
  51                                BLUE_CMP(LCD_BRIGHTCOLOR), 0};
  52 #ifdef HAVE_LCD_SPLIT
  53 SDL_Color lcd_color2_dark   = {RED_CMP(LCD_DARKCOLOR_2),
  54                                GREEN_CMP(LCD_DARKCOLOR_2),
  55                                BLUE_CMP(LCD_DARKCOLOR_2), 0};
  56 SDL_Color lcd_color2_bright = {RED_CMP(LCD_BRIGHTCOLOR_2),
  57                                GREEN_CMP(LCD_BRIGHTCOLOR_2),
  58                                BLUE_CMP(LCD_BRIGHTCOLOR_2), 0};
  59 #endif
  60
  61 #ifdef HAVE_LCD_SPLIT
  62 #define NUM_SHADES    128
  63 #else
  64 #define NUM_SHADES    129
  65 #endif
  66
  67 #else /* LCD_DEPTH > 8 */
  68
  69 #ifdef HAVE_TRANSFLECTIVE_LCD
  70 #define BACKLIGHT_OFF_ALPHA 85 /* 1/3 brightness */
  71 #else
  72 #define BACKLIGHT_OFF_ALPHA 0  /* pitch black */
  73 #endif
  74
  75 #endif /* LCD_DEPTH */
  76
  77 #if LCD_DEPTH < 8
  78 unsigned long (*lcd_ex_getpixel)(int, int) = NULL;
  79 #endif /* LCD_DEPTH < 8 */
  80
  81 #if LCD_DEPTH == 2
  82 /* Only defined for positive, non-split LCD for now */
  83 static const unsigned char colorindex[4] = {128, 85, 43, 0};
  84 #endif
  85
  86 static unsigned long get_lcd_pixel(int x, int y)
  87 {
  88 #if LCD_DEPTH == 1
  89 #ifdef HAVE_NEGATIVE_LCD
  90     return (lcd_framebuffer[y/8][x] & (1 << (y & 7))) ? (NUM_SHADES-1) : 0;
  91 #else
  92     return (lcd_framebuffer[y/8][x] & (1 << (y & 7))) ? 0 : (NUM_SHADES-1);
  93 #endif
  94 #elif LCD_DEPTH == 2
  95 #if LCD_PIXELFORMAT == HORIZONTAL_PACKING
  96     return colorindex[(lcd_framebuffer[y][x/4] >> (2 * (~x & 3))) & 3];
  97 #elif LCD_PIXELFORMAT == VERTICAL_PACKING
  98     return colorindex[(lcd_framebuffer[y/4][x] >> (2 * (y & 3))) & 3];
  99 #elif LCD_PIXELFORMAT == VERTICAL_INTERLEAVED
 100     unsigned bits = (lcd_framebuffer[y/8][x] >> (y & 7)) & 0x0101;
 101     return colorindex[(bits | (bits >> 7)) & 3];
 102 #endif
 103 #elif LCD_DEPTH == 16
 104 #if LCD_PIXELFORMAT == RGB565SWAPPED
 105     unsigned bits = lcd_framebuffer[y][x];
 106     return (bits >> 8) | (bits << 8);
 107 #else
 108 #if   defined(LCD_STRIDEFORMAT) && LCD_STRIDEFORMAT == VERTICAL_STRIDE
 109     return *(&lcd_framebuffer[0][0]+LCD_HEIGHT*x+y);
 110 #else
 111     return lcd_framebuffer[y][x];
 112 #endif
 113 #endif
 114 #endif
 115 }
 116
 117 void lcd_update(void)
 118 {
 119     /* update a full screen rect */
 120     lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
 121 }
 122
 123 void lcd_update_rect(int x_start, int y_start, int width, int height)
 124 {
 125     sdl_update_rect(lcd_surface, x_start, y_start, width, height,
 126                     LCD_WIDTH, LCD_HEIGHT, get_lcd_pixel);
 127     sdl_gui_update(lcd_surface, x_start, y_start, width,
 128                    height + LCD_SPLIT_LINES, SIM_LCD_WIDTH, SIM_LCD_HEIGHT,
 129                    background ? UI_LCD_POSX : 0, background? UI_LCD_POSY : 0);
 130 }
 131
 132 #ifdef HAVE_BACKLIGHT
 133 void sim_backlight(int value)
 134 {
 135 #if LCD_DEPTH <= 8
 136     if (value > 0) {
 137         sdl_set_gradient(lcd_surface, &lcd_bl_color_dark,
 138                          &lcd_bl_color_bright, 0, NUM_SHADES);
 139 #ifdef HAVE_LCD_SPLIT
 140         sdl_set_gradient(lcd_surface, &lcd_bl_color2_dark,
 141                          &lcd_bl_color2_bright, NUM_SHADES, NUM_SHADES);
 142 #endif
 143     } else {
 144         sdl_set_gradient(lcd_surface, &lcd_color_dark,
 145                          &lcd_color_bright, 0, NUM_SHADES);
 146 #ifdef HAVE_LCD_SPLIT
 147         sdl_set_gradient(lcd_surface, &lcd_color2_dark,
 148                          &lcd_color2_bright, NUM_SHADES, NUM_SHADES);
 149 #endif
 150     }
 151 #else /* LCD_DEPTH > 8 */
 152     SDL_SetAlpha(lcd_surface, SDL_SRCALPHA, (value * 255) / 100);
 153 #endif /* LCD_DEPTH */
 154
 155     sdl_gui_update(lcd_surface, 0, 0, SIM_LCD_WIDTH, SIM_LCD_HEIGHT,
 156                    SIM_LCD_WIDTH, SIM_LCD_HEIGHT,
 157                    background ? UI_LCD_POSX : 0, background? UI_LCD_POSY : 0);
 158 }
 159 #endif /* HAVE_BACKLIGHT */
 160
 161 /* initialise simulator lcd driver */
 162 void sim_lcd_init(void)
 163 {
 164 #if LCD_DEPTH == 16
 165     lcd_surface = SDL_CreateRGBSurface(SDL_SWSURFACE,
 166                                        SIM_LCD_WIDTH * display_zoom,
 167                                        SIM_LCD_HEIGHT * display_zoom,
 168                                        LCD_DEPTH, 0, 0, 0, 0);
 169 #elif LCD_DEPTH <= 8
 170     lcd_surface = SDL_CreateRGBSurface(SDL_SWSURFACE,
 171                                        SIM_LCD_WIDTH * display_zoom,
 172                                        SIM_LCD_HEIGHT * display_zoom,
 173                                        8, 0, 0, 0, 0);
 174
 175 #ifdef HAVE_BACKLIGHT
 176     sdl_set_gradient(lcd_surface, &lcd_bl_color_dark,
 177                      &lcd_bl_color_bright, 0, NUM_SHADES);
 178 #ifdef HAVE_LCD_SPLIT
 179     sdl_set_gradient(lcd_surface, &lcd_bl_color2_dark,
 180                      &lcd_bl_color2_bright, NUM_SHADES, NUM_SHADES);
 181 #endif
 182 #else /* !HAVE_BACKLIGHT */
 183     sdl_set_gradient(lcd_surface, &lcd_color_dark,
 184                      &lcd_color_bright, 0, NUM_SHADES);
 185 #ifdef HAVE_LCD_SPLIT
 186     sdl_set_gradient(lcd_surface, &lcd_color2_dark,
 187                      &lcd_color2_bright, NUM_SHADES, NUM_SHADES);
 188 #endif
 189 #endif /* !HAVE_BACKLIGHT */
 190 #endif /* LCD_DEPTH */
 191 }
 192
 193 #if LCD_DEPTH < 8
 194 void sim_lcd_ex_init(unsigned long (*getpixel)(int, int))
 195 {
 196     lcd_ex_getpixel = getpixel;
 197 }
 198
 199 void sim_lcd_ex_update_rect(int x_start, int y_start, int width, int height)
 200 {
 201     if (lcd_ex_getpixel) {
 202         sdl_update_rect(lcd_surface, x_start, y_start, width, height,
 203                         LCD_WIDTH, LCD_HEIGHT, lcd_ex_getpixel);
 204         sdl_gui_update(lcd_surface, x_start, y_start, width,
 205                        height + LCD_SPLIT_LINES, SIM_LCD_WIDTH, SIM_LCD_HEIGHT,
 206                        background ? UI_LCD_POSX : 0,
 207                        background ? UI_LCD_POSY : 0);
 208     }
 209 }
 210 #endif
 211
 212 #ifdef HAVE_LCD_COLOR
 213 /**
 214  * |R|   |1.000000 -0.000001  1.402000| |Y'|
 215  * |G| = |1.000000 -0.334136 -0.714136| |Pb|
 216  * |B|   |1.000000  1.772000  0.000000| |Pr|
 217  * Scaled, normalized, rounded and tweaked to yield RGB 565:
 218  * |R|   |74   0 101| |Y' -  16| >> 9
 219  * |G| = |74 -24 -51| |Cb - 128| >> 8
 220  * |B|   |74 128   0| |Cr - 128| >> 9
 221  */
 222 #define YFAC    (74)
 223 #define RVFAC   (101)
 224 #define GUFAC   (-24)
 225 #define GVFAC   (-51)
 226 #define BUFAC   (128)
 227
 228 static inline int clamp(int val, int min, int max)
 229 {
 230     if (val < min)
 231         val = min;
 232     else if (val > max)
 233         val = max;
 234     return val;
 235 }
 236
 237 void lcd_yuv_set_options(unsigned options)
 238 {
 239     (void)options;
 240 }
 241
 242 /* Draw a partial YUV colour bitmap - similiar behavior to lcd_blit_yuv
 243    in the core */
 244 void lcd_blit_yuv(unsigned char * const src[3],
 245                   int src_x, int src_y, int stride,
 246                   int x, int y, int width, int height)
 247 {
 248     const unsigned char *ysrc, *usrc, *vsrc;
 249     int linecounter;
 250     fb_data *dst, *row_end;
 251     long z;
 252
 253     /* width and height must be >= 2 and an even number */
 254     width &= ~1;
 255     linecounter = height >> 1;
 256
 257 #if LCD_WIDTH >= LCD_HEIGHT
 258     dst     = &lcd_framebuffer[y][x];
 259     row_end = dst + width;
 260 #else
 261     dst     = &lcd_framebuffer[x][LCD_WIDTH - y - 1];
 262     row_end = dst + LCD_WIDTH * width;
 263 #endif
 264
 265     z    = stride * src_y;
 266     ysrc = src[0] + z + src_x;
 267     usrc = src[1] + (z >> 2) + (src_x >> 1);
 268     vsrc = src[2] + (usrc - src[1]);
 269
 270     /* stride => amount to jump from end of last row to start of next */
 271     stride -= width;
 272
 273     /* upsampling, YUV->RGB conversion and reduction to RGB565 in one go */
 274
 275     do
 276     {
 277         do
 278         {
 279             int y, cb, cr, rv, guv, bu, r, g, b;
 280
 281             y  = YFAC*(*ysrc++ - 16);
 282             cb = *usrc++ - 128;
 283             cr = *vsrc++ - 128;
 284
 285             rv  =            RVFAC*cr;
 286             guv = GUFAC*cb + GVFAC*cr;
 287             bu  = BUFAC*cb;
 288
 289             r = y + rv;
 290             g = y + guv;
 291             b = y + bu;
 292
 293             if ((unsigned)(r | g | b) > 64*256-1)
 294             {
 295                 r = clamp(r, 0, 64*256-1);
 296                 g = clamp(g, 0, 64*256-1);
 297                 b = clamp(b, 0, 64*256-1);
 298             }
 299
 300             *dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);
 301
 302 #if LCD_WIDTH >= LCD_HEIGHT
 303             dst++;
 304 #else
 305             dst += LCD_WIDTH;
 306 #endif
 307
 308             y = YFAC*(*ysrc++ - 16);
 309             r = y + rv;
 310             g = y + guv;
 311             b = y + bu;
 312
 313             if ((unsigned)(r | g | b) > 64*256-1)
 314             {
 315                 r = clamp(r, 0, 64*256-1);
 316                 g = clamp(g, 0, 64*256-1);
 317                 b = clamp(b, 0, 64*256-1);
 318             }
 319
 320             *dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);
 321
 322 #if LCD_WIDTH >= LCD_HEIGHT
 323             dst++;
 324 #else
 325             dst += LCD_WIDTH;
 326 #endif
 327         }
 328         while (dst < row_end);
 329
 330         ysrc    += stride;
 331         usrc    -= width >> 1;
 332         vsrc    -= width >> 1;
 333
 334 #if LCD_WIDTH >= LCD_HEIGHT
 335         row_end += LCD_WIDTH;
 336         dst     += LCD_WIDTH - width;
 337 #else
 338         row_end -= 1;
 339         dst     -= LCD_WIDTH*width + 1;
 340 #endif
 341
 342         do
 343         {
 344             int y, cb, cr, rv, guv, bu, r, g, b;
 345
 346             y  = YFAC*(*ysrc++ - 16);
 347             cb = *usrc++ - 128;
 348             cr = *vsrc++ - 128;
 349
 350             rv  =            RVFAC*cr;
 351             guv = GUFAC*cb + GVFAC*cr;
 352             bu  = BUFAC*cb;
 353
 354             r = y + rv;
 355             g = y + guv;
 356             b = y + bu;
 357
 358             if ((unsigned)(r | g | b) > 64*256-1)
 359             {
 360                 r = clamp(r, 0, 64*256-1);
 361                 g = clamp(g, 0, 64*256-1);
 362                 b = clamp(b, 0, 64*256-1);
 363             }
 364
 365             *dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);
 366
 367 #if LCD_WIDTH >= LCD_HEIGHT
 368             dst++;
 369 #else
 370             dst += LCD_WIDTH;
 371 #endif
 372
 373             y = YFAC*(*ysrc++ - 16);
 374             r = y + rv;
 375             g = y + guv;
 376             b = y + bu;
 377
 378             if ((unsigned)(r | g | b) > 64*256-1)
 379             {
 380                 r = clamp(r, 0, 64*256-1);
 381                 g = clamp(g, 0, 64*256-1);
 382                 b = clamp(b, 0, 64*256-1);
 383             }
 384
 385             *dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);
 386
 387 #if LCD_WIDTH >= LCD_HEIGHT
 388             dst++;
 389 #else
 390             dst += LCD_WIDTH;
 391 #endif
 392         }
 393         while (dst < row_end);
 394
 395         ysrc    += stride;
 396         usrc    += stride >> 1;
 397         vsrc    += stride >> 1;
 398
 399 #if LCD_WIDTH >= LCD_HEIGHT
 400         row_end += LCD_WIDTH;
 401         dst     += LCD_WIDTH - width;
 402 #else
 403         row_end -= 1;
 404         dst     -= LCD_WIDTH*width + 1;
 405 #endif
 406     }
 407     while (--linecounter > 0);
 408
 409 #if LCD_WIDTH >= LCD_HEIGHT
 410     lcd_update_rect(x, y, width, height);
 411 #else
 412     lcd_update_rect(LCD_WIDTH - y - height, x, height, width);
 413 #endif
 414 }
 415 #endif /* HAVE_LCD_COLOR */