Antonino A. Daplas | 68648ed | 2007-05-08 00:38:57 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Generic 1-bit or 8-bit source to 1-32 bit destination expansion |
| 3 | * for frame buffer located in system RAM with packed pixels of any depth. |
| 4 | * |
| 5 | * Based almost entirely on cfbimgblt.c |
| 6 | * |
| 7 | * Copyright (C) April 2007 Antonino Daplas <adaplas@pol.net> |
| 8 | * |
| 9 | * This file is subject to the terms and conditions of the GNU General Public |
| 10 | * License. See the file COPYING in the main directory of this archive for |
| 11 | * more details. |
| 12 | */ |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/string.h> |
| 15 | #include <linux/fb.h> |
| 16 | #include <asm/types.h> |
| 17 | |
| 18 | #define DEBUG |
| 19 | |
| 20 | #ifdef DEBUG |
Harvey Harrison | 5ae1217 | 2008-04-28 02:15:47 -0700 | [diff] [blame] | 21 | #define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt,__func__,## args) |
Antonino A. Daplas | 68648ed | 2007-05-08 00:38:57 -0700 | [diff] [blame] | 22 | #else |
| 23 | #define DPRINTK(fmt, args...) |
| 24 | #endif |
| 25 | |
Anton Vorontsov | e4c690e | 2008-04-28 02:14:49 -0700 | [diff] [blame] | 26 | static const u32 cfb_tab8_be[] = { |
Antonino A. Daplas | 68648ed | 2007-05-08 00:38:57 -0700 | [diff] [blame] | 27 | 0x00000000,0x000000ff,0x0000ff00,0x0000ffff, |
| 28 | 0x00ff0000,0x00ff00ff,0x00ffff00,0x00ffffff, |
| 29 | 0xff000000,0xff0000ff,0xff00ff00,0xff00ffff, |
| 30 | 0xffff0000,0xffff00ff,0xffffff00,0xffffffff |
Anton Vorontsov | e4c690e | 2008-04-28 02:14:49 -0700 | [diff] [blame] | 31 | }; |
| 32 | |
| 33 | static const u32 cfb_tab8_le[] = { |
Antonino A. Daplas | 68648ed | 2007-05-08 00:38:57 -0700 | [diff] [blame] | 34 | 0x00000000,0xff000000,0x00ff0000,0xffff0000, |
| 35 | 0x0000ff00,0xff00ff00,0x00ffff00,0xffffff00, |
| 36 | 0x000000ff,0xff0000ff,0x00ff00ff,0xffff00ff, |
| 37 | 0x0000ffff,0xff00ffff,0x00ffffff,0xffffffff |
Antonino A. Daplas | 68648ed | 2007-05-08 00:38:57 -0700 | [diff] [blame] | 38 | }; |
| 39 | |
Anton Vorontsov | e4c690e | 2008-04-28 02:14:49 -0700 | [diff] [blame] | 40 | static const u32 cfb_tab16_be[] = { |
Antonino A. Daplas | 68648ed | 2007-05-08 00:38:57 -0700 | [diff] [blame] | 41 | 0x00000000, 0x0000ffff, 0xffff0000, 0xffffffff |
Anton Vorontsov | e4c690e | 2008-04-28 02:14:49 -0700 | [diff] [blame] | 42 | }; |
| 43 | |
| 44 | static const u32 cfb_tab16_le[] = { |
Antonino A. Daplas | 68648ed | 2007-05-08 00:38:57 -0700 | [diff] [blame] | 45 | 0x00000000, 0xffff0000, 0x0000ffff, 0xffffffff |
Antonino A. Daplas | 68648ed | 2007-05-08 00:38:57 -0700 | [diff] [blame] | 46 | }; |
| 47 | |
| 48 | static const u32 cfb_tab32[] = { |
| 49 | 0x00000000, 0xffffffff |
| 50 | }; |
| 51 | |
| 52 | static void color_imageblit(const struct fb_image *image, struct fb_info *p, |
| 53 | void *dst1, u32 start_index, u32 pitch_index) |
| 54 | { |
| 55 | /* Draw the penguin */ |
| 56 | u32 *dst, *dst2; |
| 57 | u32 color = 0, val, shift; |
| 58 | int i, n, bpp = p->var.bits_per_pixel; |
| 59 | u32 null_bits = 32 - bpp; |
| 60 | u32 *palette = (u32 *) p->pseudo_palette; |
| 61 | const u8 *src = image->data; |
| 62 | |
| 63 | dst2 = dst1; |
| 64 | for (i = image->height; i--; ) { |
| 65 | n = image->width; |
| 66 | dst = dst1; |
| 67 | shift = 0; |
| 68 | val = 0; |
| 69 | |
| 70 | if (start_index) { |
Anton Vorontsov | e4c690e | 2008-04-28 02:14:49 -0700 | [diff] [blame] | 71 | u32 start_mask = ~(FB_SHIFT_HIGH(p, ~(u32)0, |
Antonino A. Daplas | 68648ed | 2007-05-08 00:38:57 -0700 | [diff] [blame] | 72 | start_index)); |
| 73 | val = *dst & start_mask; |
| 74 | shift = start_index; |
| 75 | } |
| 76 | while (n--) { |
| 77 | if (p->fix.visual == FB_VISUAL_TRUECOLOR || |
| 78 | p->fix.visual == FB_VISUAL_DIRECTCOLOR ) |
| 79 | color = palette[*src]; |
| 80 | else |
| 81 | color = *src; |
Anton Vorontsov | e4c690e | 2008-04-28 02:14:49 -0700 | [diff] [blame] | 82 | color <<= FB_LEFT_POS(p, bpp); |
| 83 | val |= FB_SHIFT_HIGH(p, color, shift); |
Antonino A. Daplas | 68648ed | 2007-05-08 00:38:57 -0700 | [diff] [blame] | 84 | if (shift >= null_bits) { |
| 85 | *dst++ = val; |
| 86 | |
| 87 | val = (shift == null_bits) ? 0 : |
Anton Vorontsov | e4c690e | 2008-04-28 02:14:49 -0700 | [diff] [blame] | 88 | FB_SHIFT_LOW(p, color, 32 - shift); |
Antonino A. Daplas | 68648ed | 2007-05-08 00:38:57 -0700 | [diff] [blame] | 89 | } |
| 90 | shift += bpp; |
| 91 | shift &= (32 - 1); |
| 92 | src++; |
| 93 | } |
| 94 | if (shift) { |
Anton Vorontsov | e4c690e | 2008-04-28 02:14:49 -0700 | [diff] [blame] | 95 | u32 end_mask = FB_SHIFT_HIGH(p, ~(u32)0, shift); |
Antonino A. Daplas | 68648ed | 2007-05-08 00:38:57 -0700 | [diff] [blame] | 96 | |
| 97 | *dst &= end_mask; |
| 98 | *dst |= val; |
| 99 | } |
| 100 | dst1 += p->fix.line_length; |
| 101 | if (pitch_index) { |
| 102 | dst2 += p->fix.line_length; |
| 103 | dst1 = (u8 *)((long)dst2 & ~(sizeof(u32) - 1)); |
| 104 | |
| 105 | start_index += pitch_index; |
| 106 | start_index &= 32 - 1; |
| 107 | } |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | static void slow_imageblit(const struct fb_image *image, struct fb_info *p, |
| 112 | void *dst1, u32 fgcolor, u32 bgcolor, |
| 113 | u32 start_index, u32 pitch_index) |
| 114 | { |
| 115 | u32 shift, color = 0, bpp = p->var.bits_per_pixel; |
| 116 | u32 *dst, *dst2; |
| 117 | u32 val, pitch = p->fix.line_length; |
| 118 | u32 null_bits = 32 - bpp; |
| 119 | u32 spitch = (image->width+7)/8; |
| 120 | const u8 *src = image->data, *s; |
| 121 | u32 i, j, l; |
| 122 | |
| 123 | dst2 = dst1; |
Anton Vorontsov | e4c690e | 2008-04-28 02:14:49 -0700 | [diff] [blame] | 124 | fgcolor <<= FB_LEFT_POS(p, bpp); |
| 125 | bgcolor <<= FB_LEFT_POS(p, bpp); |
Antonino A. Daplas | 68648ed | 2007-05-08 00:38:57 -0700 | [diff] [blame] | 126 | |
| 127 | for (i = image->height; i--; ) { |
| 128 | shift = val = 0; |
| 129 | l = 8; |
| 130 | j = image->width; |
| 131 | dst = dst1; |
| 132 | s = src; |
| 133 | |
| 134 | /* write leading bits */ |
| 135 | if (start_index) { |
Anton Vorontsov | e4c690e | 2008-04-28 02:14:49 -0700 | [diff] [blame] | 136 | u32 start_mask = ~(FB_SHIFT_HIGH(p, ~(u32)0, |
| 137 | start_index)); |
Antonino A. Daplas | 68648ed | 2007-05-08 00:38:57 -0700 | [diff] [blame] | 138 | val = *dst & start_mask; |
| 139 | shift = start_index; |
| 140 | } |
| 141 | |
| 142 | while (j--) { |
| 143 | l--; |
| 144 | color = (*s & (1 << l)) ? fgcolor : bgcolor; |
Anton Vorontsov | e4c690e | 2008-04-28 02:14:49 -0700 | [diff] [blame] | 145 | val |= FB_SHIFT_HIGH(p, color, shift); |
Antonino A. Daplas | 68648ed | 2007-05-08 00:38:57 -0700 | [diff] [blame] | 146 | |
| 147 | /* Did the bitshift spill bits to the next long? */ |
| 148 | if (shift >= null_bits) { |
| 149 | *dst++ = val; |
| 150 | val = (shift == null_bits) ? 0 : |
Anton Vorontsov | e4c690e | 2008-04-28 02:14:49 -0700 | [diff] [blame] | 151 | FB_SHIFT_LOW(p, color, 32 - shift); |
Antonino A. Daplas | 68648ed | 2007-05-08 00:38:57 -0700 | [diff] [blame] | 152 | } |
| 153 | shift += bpp; |
| 154 | shift &= (32 - 1); |
Joe Perches | cf6ac4ce | 2013-10-08 16:23:24 -0700 | [diff] [blame] | 155 | if (!l) { l = 8; s++; } |
Antonino A. Daplas | 68648ed | 2007-05-08 00:38:57 -0700 | [diff] [blame] | 156 | } |
| 157 | |
| 158 | /* write trailing bits */ |
| 159 | if (shift) { |
Anton Vorontsov | e4c690e | 2008-04-28 02:14:49 -0700 | [diff] [blame] | 160 | u32 end_mask = FB_SHIFT_HIGH(p, ~(u32)0, shift); |
Antonino A. Daplas | 68648ed | 2007-05-08 00:38:57 -0700 | [diff] [blame] | 161 | |
| 162 | *dst &= end_mask; |
| 163 | *dst |= val; |
| 164 | } |
| 165 | |
| 166 | dst1 += pitch; |
| 167 | src += spitch; |
| 168 | if (pitch_index) { |
| 169 | dst2 += pitch; |
| 170 | dst1 = (u8 *)((long)dst2 & ~(sizeof(u32) - 1)); |
| 171 | start_index += pitch_index; |
| 172 | start_index &= 32 - 1; |
| 173 | } |
| 174 | |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | /* |
| 179 | * fast_imageblit - optimized monochrome color expansion |
| 180 | * |
| 181 | * Only if: bits_per_pixel == 8, 16, or 32 |
| 182 | * image->width is divisible by pixel/dword (ppw); |
| 183 | * fix->line_legth is divisible by 4; |
| 184 | * beginning and end of a scanline is dword aligned |
| 185 | */ |
| 186 | static void fast_imageblit(const struct fb_image *image, struct fb_info *p, |
| 187 | void *dst1, u32 fgcolor, u32 bgcolor) |
| 188 | { |
| 189 | u32 fgx = fgcolor, bgx = bgcolor, bpp = p->var.bits_per_pixel; |
| 190 | u32 ppw = 32/bpp, spitch = (image->width + 7)/8; |
| 191 | u32 bit_mask, end_mask, eorx, shift; |
| 192 | const char *s = image->data, *src; |
| 193 | u32 *dst; |
| 194 | const u32 *tab = NULL; |
| 195 | int i, j, k; |
| 196 | |
| 197 | switch (bpp) { |
| 198 | case 8: |
Anton Vorontsov | e4c690e | 2008-04-28 02:14:49 -0700 | [diff] [blame] | 199 | tab = fb_be_math(p) ? cfb_tab8_be : cfb_tab8_le; |
Antonino A. Daplas | 68648ed | 2007-05-08 00:38:57 -0700 | [diff] [blame] | 200 | break; |
| 201 | case 16: |
Anton Vorontsov | e4c690e | 2008-04-28 02:14:49 -0700 | [diff] [blame] | 202 | tab = fb_be_math(p) ? cfb_tab16_be : cfb_tab16_le; |
Antonino A. Daplas | 68648ed | 2007-05-08 00:38:57 -0700 | [diff] [blame] | 203 | break; |
| 204 | case 32: |
| 205 | default: |
| 206 | tab = cfb_tab32; |
| 207 | break; |
| 208 | } |
| 209 | |
| 210 | for (i = ppw-1; i--; ) { |
| 211 | fgx <<= bpp; |
| 212 | bgx <<= bpp; |
| 213 | fgx |= fgcolor; |
| 214 | bgx |= bgcolor; |
| 215 | } |
| 216 | |
| 217 | bit_mask = (1 << ppw) - 1; |
| 218 | eorx = fgx ^ bgx; |
| 219 | k = image->width/ppw; |
| 220 | |
| 221 | for (i = image->height; i--; ) { |
| 222 | dst = dst1; |
| 223 | shift = 8; |
| 224 | src = s; |
| 225 | |
| 226 | for (j = k; j--; ) { |
| 227 | shift -= ppw; |
| 228 | end_mask = tab[(*src >> shift) & bit_mask]; |
| 229 | *dst++ = (end_mask & eorx) ^ bgx; |
| 230 | if (!shift) { |
| 231 | shift = 8; |
| 232 | src++; |
| 233 | } |
| 234 | } |
| 235 | dst1 += p->fix.line_length; |
| 236 | s += spitch; |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | void sys_imageblit(struct fb_info *p, const struct fb_image *image) |
| 241 | { |
| 242 | u32 fgcolor, bgcolor, start_index, bitstart, pitch_index = 0; |
| 243 | u32 bpl = sizeof(u32), bpp = p->var.bits_per_pixel; |
| 244 | u32 width = image->width; |
| 245 | u32 dx = image->dx, dy = image->dy; |
| 246 | void *dst1; |
| 247 | |
| 248 | if (p->state != FBINFO_STATE_RUNNING) |
| 249 | return; |
| 250 | |
| 251 | bitstart = (dy * p->fix.line_length * 8) + (dx * bpp); |
| 252 | start_index = bitstart & (32 - 1); |
| 253 | pitch_index = (p->fix.line_length & (bpl - 1)) * 8; |
| 254 | |
| 255 | bitstart /= 8; |
| 256 | bitstart &= ~(bpl - 1); |
| 257 | dst1 = (void __force *)p->screen_base + bitstart; |
| 258 | |
| 259 | if (p->fbops->fb_sync) |
| 260 | p->fbops->fb_sync(p); |
| 261 | |
| 262 | if (image->depth == 1) { |
| 263 | if (p->fix.visual == FB_VISUAL_TRUECOLOR || |
| 264 | p->fix.visual == FB_VISUAL_DIRECTCOLOR) { |
| 265 | fgcolor = ((u32*)(p->pseudo_palette))[image->fg_color]; |
| 266 | bgcolor = ((u32*)(p->pseudo_palette))[image->bg_color]; |
| 267 | } else { |
| 268 | fgcolor = image->fg_color; |
| 269 | bgcolor = image->bg_color; |
| 270 | } |
| 271 | |
| 272 | if (32 % bpp == 0 && !start_index && !pitch_index && |
| 273 | ((width & (32/bpp-1)) == 0) && |
| 274 | bpp >= 8 && bpp <= 32) |
| 275 | fast_imageblit(image, p, dst1, fgcolor, bgcolor); |
| 276 | else |
| 277 | slow_imageblit(image, p, dst1, fgcolor, bgcolor, |
| 278 | start_index, pitch_index); |
| 279 | } else |
| 280 | color_imageblit(image, p, dst1, start_index, pitch_index); |
| 281 | } |
| 282 | |
| 283 | EXPORT_SYMBOL(sys_imageblit); |
| 284 | |
| 285 | MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>"); |
| 286 | MODULE_DESCRIPTION("1-bit/8-bit to 1-32 bit color expansion (sys-to-sys)"); |
| 287 | MODULE_LICENSE("GPL"); |
| 288 | |