Greg Hartman | 76d05dc | 2016-11-23 15:51:27 -0800 | [diff] [blame] | 1 | /* ----------------------------------------------------------------------- * |
| 2 | * |
| 3 | * Copyright 2006-2008 H. Peter Anvin - All Rights Reserved |
| 4 | * |
| 5 | * Permission is hereby granted, free of charge, to any person |
| 6 | * obtaining a copy of this software and associated documentation |
| 7 | * files (the "Software"), to deal in the Software without |
| 8 | * restriction, including without limitation the rights to use, |
| 9 | * copy, modify, merge, publish, distribute, sublicense, and/or |
| 10 | * sell copies of the Software, and to permit persons to whom |
| 11 | * the Software is furnished to do so, subject to the following |
| 12 | * conditions: |
| 13 | * |
| 14 | * The above copyright notice and this permission notice shall |
| 15 | * be included in all copies or substantial portions of the Software. |
| 16 | * |
| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 18 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES |
| 19 | * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 20 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
| 21 | * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| 22 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 23 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 24 | * OTHER DEALINGS IN THE SOFTWARE. |
| 25 | * |
| 26 | * ----------------------------------------------------------------------- */ |
| 27 | |
| 28 | #include <inttypes.h> |
| 29 | #include <colortbl.h> |
| 30 | #include <string.h> |
| 31 | #include "vesa.h" |
| 32 | #include "video.h" |
| 33 | #include "fill.h" |
| 34 | |
| 35 | /* |
| 36 | * Visible cursor information |
| 37 | */ |
| 38 | static uint8_t cursor_pattern[FONT_MAX_HEIGHT]; |
| 39 | static struct vesa_char *cursor_pointer = NULL; |
| 40 | static int cursor_x, cursor_y; |
| 41 | |
| 42 | static inline void *copy_dword(void *dst, void *src, size_t dword_count) |
| 43 | { |
| 44 | asm volatile ("rep; movsl":"+D" (dst), "+S"(src), "+c"(dword_count)); |
| 45 | return dst; /* Updated destination pointer */ |
| 46 | } |
| 47 | |
| 48 | static inline __attribute__ ((always_inline)) |
| 49 | uint8_t alpha_val(uint8_t fg, uint8_t bg, uint8_t alpha) |
| 50 | { |
| 51 | unsigned int tmp; |
| 52 | |
| 53 | tmp = __vesacon_srgb_to_linear[fg] * alpha; |
| 54 | tmp += __vesacon_srgb_to_linear[bg] * (255 - alpha); |
| 55 | |
| 56 | return __vesacon_linear_to_srgb[tmp >> 12]; |
| 57 | } |
| 58 | |
| 59 | static uint32_t alpha_pixel(uint32_t fg, uint32_t bg) |
| 60 | { |
| 61 | uint8_t alpha = fg >> 24; |
| 62 | uint8_t fg_r = fg >> 16; |
| 63 | uint8_t fg_g = fg >> 8; |
| 64 | uint8_t fg_b = fg; |
| 65 | uint8_t bg_r = bg >> 16; |
| 66 | uint8_t bg_g = bg >> 8; |
| 67 | uint8_t bg_b = bg; |
| 68 | |
| 69 | return |
| 70 | (alpha_val(fg_r, bg_r, alpha) << 16) | |
| 71 | (alpha_val(fg_g, bg_g, alpha) << 8) | (alpha_val(fg_b, bg_b, alpha)); |
| 72 | } |
| 73 | |
| 74 | static void vesacon_update_characters(int row, int col, int nrows, int ncols) |
| 75 | { |
| 76 | const int height = __vesacon_font_height; |
| 77 | const int width = FONT_WIDTH; |
| 78 | uint32_t *bgrowptr, *bgptr, bgval, fgval; |
| 79 | uint32_t fgcolor = 0, bgcolor = 0, color; |
| 80 | uint8_t chbits = 0, chxbits = 0, chsbits = 0; |
| 81 | int i, j, jx, pixrow, pixsrow; |
| 82 | struct vesa_char *rowptr, *rowsptr, *cptr, *csptr; |
| 83 | unsigned int bytes_per_pixel = __vesacon_bytes_per_pixel; |
| 84 | unsigned long pixel_offset; |
| 85 | uint32_t row_buffer[__vesa_info.mi.h_res], *rowbufptr; |
| 86 | size_t fbrowptr; |
| 87 | uint8_t sha; |
| 88 | |
| 89 | pixel_offset = ((row * height + VIDEO_BORDER) * __vesa_info.mi.h_res) + |
| 90 | (col * width + VIDEO_BORDER); |
| 91 | |
| 92 | bgrowptr = &__vesacon_background[pixel_offset]; |
| 93 | fbrowptr = (row * height + VIDEO_BORDER) * __vesa_info.mi.logical_scan + |
| 94 | (col * width + VIDEO_BORDER) * bytes_per_pixel; |
| 95 | |
| 96 | /* Note that we keep a 1-character guard area around the real text area... */ |
| 97 | rowptr = &__vesacon_text_display[(row+1)*(__vesacon_text_cols+2)+(col+1)]; |
| 98 | rowsptr = rowptr - ((__vesacon_text_cols+2)+1); |
| 99 | pixrow = 0; |
| 100 | pixsrow = height - 1; |
| 101 | |
| 102 | for (i = height * nrows; i >= 0; i--) { |
| 103 | bgptr = bgrowptr; |
| 104 | rowbufptr = row_buffer; |
| 105 | |
| 106 | cptr = rowptr; |
| 107 | csptr = rowsptr; |
| 108 | |
| 109 | chsbits = __vesacon_graphics_font[csptr->ch][pixsrow]; |
| 110 | if (__unlikely(csptr == cursor_pointer)) |
| 111 | chsbits |= cursor_pattern[pixsrow]; |
| 112 | sha = console_color_table[csptr->attr].shadow; |
| 113 | chsbits &= (sha & 0x02) ? 0xff : 0x00; |
| 114 | chsbits ^= (sha & 0x01) ? 0xff : 0x00; |
| 115 | chsbits <<= (width - 2); |
| 116 | csptr++; |
| 117 | |
| 118 | /* Draw two pixels beyond the end of the line. One for the shadow, |
| 119 | and one to make sure we have a whole dword of data for the copy |
| 120 | operation at the end. Note that this code depends on the fact that |
| 121 | all characters begin on dword boundaries in the frame buffer. */ |
| 122 | |
| 123 | for (jx = 1, j = width * ncols + 1; j >= 0; j--) { |
| 124 | chbits <<= 1; |
| 125 | chsbits <<= 1; |
| 126 | chxbits <<= 1; |
| 127 | |
| 128 | switch (jx) { |
| 129 | case 1: |
| 130 | chbits = __vesacon_graphics_font[cptr->ch][pixrow]; |
| 131 | if (__unlikely(cptr == cursor_pointer)) |
| 132 | chbits |= cursor_pattern[pixrow]; |
| 133 | sha = console_color_table[cptr->attr].shadow; |
| 134 | chxbits = chbits; |
| 135 | chxbits &= (sha & 0x02) ? 0xff : 0x00; |
| 136 | chxbits ^= (sha & 0x01) ? 0xff : 0x00; |
| 137 | fgcolor = console_color_table[cptr->attr].argb_fg; |
| 138 | bgcolor = console_color_table[cptr->attr].argb_bg; |
| 139 | cptr++; |
| 140 | jx--; |
| 141 | break; |
| 142 | case 0: |
| 143 | chsbits = __vesacon_graphics_font[csptr->ch][pixsrow]; |
| 144 | if (__unlikely(csptr == cursor_pointer)) |
| 145 | chsbits |= cursor_pattern[pixsrow]; |
| 146 | sha = console_color_table[csptr->attr].shadow; |
| 147 | chsbits &= (sha & 0x02) ? 0xff : 0x00; |
| 148 | chsbits ^= (sha & 0x01) ? 0xff : 0x00; |
| 149 | csptr++; |
| 150 | jx = width - 1; |
| 151 | break; |
| 152 | default: |
| 153 | jx--; |
| 154 | break; |
| 155 | } |
| 156 | |
| 157 | /* If this pixel is raised, use the offsetted value */ |
| 158 | bgval = (chxbits & 0x80) |
| 159 | ? bgptr[__vesa_info.mi.h_res + 1] : *bgptr; |
| 160 | bgptr++; |
| 161 | |
| 162 | /* If this pixel is set, use the fg color, else the bg color */ |
| 163 | fgval = (chbits & 0x80) ? fgcolor : bgcolor; |
| 164 | |
| 165 | /* Produce the combined color pixel value */ |
| 166 | color = alpha_pixel(fgval, bgval); |
| 167 | |
| 168 | /* Apply the shadow (75% shadow) */ |
| 169 | if ((chsbits & ~chxbits) & 0x80) { |
| 170 | color >>= 2; |
| 171 | color &= 0x3f3f3f; |
| 172 | } |
| 173 | |
| 174 | *rowbufptr++ = color; |
| 175 | } |
| 176 | |
| 177 | /* Copy to frame buffer */ |
| 178 | __vesacon_copy_to_screen(fbrowptr, row_buffer, rowbufptr - row_buffer); |
| 179 | |
| 180 | bgrowptr += __vesa_info.mi.h_res; |
| 181 | fbrowptr += __vesa_info.mi.logical_scan; |
| 182 | |
| 183 | if (++pixrow == height) { |
| 184 | rowptr += __vesacon_text_cols + 2; |
| 185 | pixrow = 0; |
| 186 | } |
| 187 | if (++pixsrow == height) { |
| 188 | rowsptr += __vesacon_text_cols + 2; |
| 189 | pixsrow = 0; |
| 190 | } |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | /* Bounding box for changed text. The (x1, y1) coordinates are +1! */ |
| 195 | static unsigned int upd_x0 = -1U, upd_x1, upd_y0 = -1U, upd_y1; |
| 196 | |
| 197 | /* Update the range already touched by various variables */ |
| 198 | void __vesacon_doit(void) |
| 199 | { |
| 200 | if (upd_x1 > upd_x0 && upd_y1 > upd_y0) { |
| 201 | vesacon_update_characters(upd_y0, upd_x0, upd_y1 - upd_y0, |
| 202 | upd_x1 - upd_x0); |
| 203 | upd_x0 = upd_y0 = -1U; |
| 204 | upd_x1 = upd_y1 = 0; |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | /* Mark a range for update; note argument sequence is the same as |
| 209 | vesacon_update_characters() */ |
| 210 | static inline void vesacon_touch(int row, int col, int rows, int cols) |
| 211 | { |
| 212 | unsigned int y0 = row; |
| 213 | unsigned int x0 = col; |
| 214 | unsigned int y1 = y0 + rows; |
| 215 | unsigned int x1 = x0 + cols; |
| 216 | |
| 217 | if (y0 < upd_y0) |
| 218 | upd_y0 = y0; |
| 219 | if (y1 > upd_y1) |
| 220 | upd_y1 = y1; |
| 221 | if (x0 < upd_x0) |
| 222 | upd_x0 = x0; |
| 223 | if (x1 > upd_x1) |
| 224 | upd_x1 = x1; |
| 225 | } |
| 226 | |
| 227 | /* Erase a region of the screen */ |
| 228 | void __vesacon_erase(int x0, int y0, int x1, int y1, attr_t attr) |
| 229 | { |
| 230 | int y; |
| 231 | struct vesa_char *ptr = &__vesacon_text_display |
| 232 | [(y0 + 1) * (__vesacon_text_cols + 2) + (x0 + 1)]; |
| 233 | struct vesa_char fill = { |
| 234 | .ch = ' ', |
| 235 | .attr = attr, |
| 236 | }; |
| 237 | int ncols = x1 - x0 + 1; |
| 238 | |
| 239 | for (y = y0; y <= y1; y++) { |
| 240 | vesacon_fill(ptr, fill, ncols); |
| 241 | ptr += __vesacon_text_cols + 2; |
| 242 | } |
| 243 | |
| 244 | vesacon_touch(y0, x0, y1 - y0 + 1, ncols); |
| 245 | } |
| 246 | |
| 247 | /* Scroll the screen up */ |
| 248 | void __vesacon_scroll_up(int nrows, attr_t attr) |
| 249 | { |
| 250 | struct vesa_char *fromptr = &__vesacon_text_display |
| 251 | [(nrows + 1) * (__vesacon_text_cols + 2)]; |
| 252 | struct vesa_char *toptr = &__vesacon_text_display |
| 253 | [(__vesacon_text_cols + 2)]; |
| 254 | int dword_count = |
| 255 | (__vesacon_text_rows - nrows) * (__vesacon_text_cols + 2); |
| 256 | struct vesa_char fill = { |
| 257 | .ch = ' ', |
| 258 | .attr = attr, |
| 259 | }; |
| 260 | |
| 261 | toptr = copy_dword(toptr, fromptr, dword_count); |
| 262 | |
| 263 | dword_count = nrows * (__vesacon_text_cols + 2); |
| 264 | |
| 265 | vesacon_fill(toptr, fill, dword_count); |
| 266 | |
| 267 | vesacon_touch(0, 0, __vesacon_text_rows, __vesacon_text_cols); |
| 268 | } |
| 269 | |
| 270 | /* Draw one character text at a specific area of the screen */ |
| 271 | void __vesacon_write_char(int x, int y, uint8_t ch, attr_t attr) |
| 272 | { |
| 273 | struct vesa_char *ptr = &__vesacon_text_display |
| 274 | [(y + 1) * (__vesacon_text_cols + 2) + (x + 1)]; |
| 275 | |
| 276 | ptr->ch = ch; |
| 277 | ptr->attr = attr; |
| 278 | |
| 279 | vesacon_touch(y, x, 1, 1); |
| 280 | } |
| 281 | |
| 282 | void __vesacon_set_cursor(int x, int y, bool visible) |
| 283 | { |
| 284 | struct vesa_char *ptr = &__vesacon_text_display |
| 285 | [(y + 1) * (__vesacon_text_cols + 2) + (x + 1)]; |
| 286 | |
| 287 | if (cursor_pointer) |
| 288 | vesacon_touch(cursor_y, cursor_x, 1, 1); |
| 289 | |
| 290 | if (!visible) { |
| 291 | /* Invisible cursor */ |
| 292 | cursor_pointer = NULL; |
| 293 | } else { |
| 294 | cursor_pointer = ptr; |
| 295 | vesacon_touch(y, x, 1, 1); |
| 296 | } |
| 297 | |
| 298 | cursor_x = x; |
| 299 | cursor_y = y; |
| 300 | } |
| 301 | |
| 302 | void __vesacon_init_cursor(int font_height) |
| 303 | { |
| 304 | int r0 = font_height - (font_height < 10 ? 2 : 3); |
| 305 | |
| 306 | if (r0 < 0) |
| 307 | r0 = 0; |
| 308 | |
| 309 | memset(cursor_pattern, 0, font_height); |
| 310 | cursor_pattern[r0] = 0xff; |
| 311 | cursor_pattern[r0 + 1] = 0xff; |
| 312 | } |
| 313 | |
| 314 | void __vesacon_redraw_text(void) |
| 315 | { |
| 316 | vesacon_update_characters(0, 0, __vesacon_text_rows, __vesacon_text_cols); |
| 317 | } |