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Add memtest support.
[syslinux-debian/hramrach.git] / com32 / lib / sys / vesa / background.c
blob15e908951a2a4cd26f80fa7cd69ecf0e965cc847
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 <stdio.h>
29 #include <png.h>
30 #include <tinyjpeg.h>
31 #include <com32.h>
32 #include <unistd.h>
33 #include <stdlib.h>
34 #include <sys/stat.h>
35 #include <minmax.h>
36 #include <stdbool.h>
37 #include <ilog2.h>
38 #include <syslinux/loadfile.h>
39 #include "vesa.h"
40 #include "video.h"
41
42 /*** FIX: This really should be alpha-blended with color index 0 ***/
43
44 /* For best performance, "start" should be a multiple of 4, to assure
45 aligned dwords. */
46 static void draw_background_line(int line, int start, int npixels)
47 {
48 uint32_t *bgptr = &__vesacon_background[line*__vesa_info.mi.h_res+start];
49 unsigned int bytes_per_pixel = __vesacon_bytes_per_pixel;
50 size_t fbptr = line * __vesa_info.mi.logical_scan + start*bytes_per_pixel;
51
52 __vesacon_copy_to_screen(fbptr, bgptr, npixels);
53 }
54
55 /* This draws the border, then redraws the text area */
56 static void draw_background(void)
57 {
58 int i;
59 const int bottom_border = VIDEO_BORDER +
60 (TEXT_PIXEL_ROWS % __vesacon_font_height);
61 const int right_border = VIDEO_BORDER + (TEXT_PIXEL_COLS % FONT_WIDTH);
62
63 for (i = 0; i < VIDEO_BORDER; i++)
64 draw_background_line(i, 0, __vesa_info.mi.h_res);
65
66 for (i = VIDEO_BORDER; i < __vesa_info.mi.v_res - bottom_border; i++) {
67 draw_background_line(i, 0, VIDEO_BORDER);
68 draw_background_line(i, __vesa_info.mi.h_res - right_border,
69 right_border);
70 }
71
72 for (i = __vesa_info.mi.v_res - bottom_border;
73 i < __vesa_info.mi.v_res; i++)
74 draw_background_line(i, 0, __vesa_info.mi.h_res);
75
76 __vesacon_redraw_text();
77 }
78
79 /*
80 * Tile an image in the UL corner across the entire screen
81 */
82 static void tile_image(int width, int height)
83 {
84 int xsize = __vesa_info.mi.h_res;
85 int ysize = __vesa_info.mi.v_res;
86 int x, y, yr;
87 int xl, yl;
88 uint32_t *sp, *dp, *drp, *dtp;
89
90 drp = __vesacon_background;
91 for (y = 0 ; y < ysize ; y += height) {
92 yl = min(height, ysize-y);
93 dtp = drp;
94 for (x = 0 ; x < xsize ; x += width) {
95 xl = min(width, xsize-x);
96 if (x || y) {
97 sp = __vesacon_background;
98 dp = dtp;
99 for (yr = 0 ; yr < yl ; yr++) {
100 memcpy(dp, sp, xl*sizeof(uint32_t));
101 dp += xsize;
102 sp += xsize;
103 }
104 }
105 dtp += xl;
106 }
107 drp += xsize*height;
108 }
109 }
110
111 static int read_png_file(FILE * fp)
112 {
113 png_structp png_ptr = NULL;
114 png_infop info_ptr = NULL;
115 #if 0
116 png_color_16p image_background;
117 static const png_color_16 my_background = { 0, 0, 0, 0, 0 };
118 #endif
119 png_bytep row_pointers[__vesa_info.mi.v_res], rp;
120 int i;
121 int rv = -1;
122
123 png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
124 info_ptr = png_create_info_struct(png_ptr);
125
126 if (!png_ptr || !info_ptr || setjmp(png_jmpbuf(png_ptr)))
127 goto err;
128
129 png_init_io(png_ptr, fp);
130 png_set_sig_bytes(png_ptr, 8);
131
132 png_set_user_limits(png_ptr, __vesa_info.mi.h_res, __vesa_info.mi.v_res);
133
134 png_read_info(png_ptr, info_ptr);
135
136 /* Set the appropriate set of transformations. We need to end up
137 with 32-bit BGRA format, no more, no less. */
138
139 /* Expand to RGB first... */
140 if (info_ptr->color_type & PNG_COLOR_MASK_PALETTE)
141 png_set_palette_to_rgb(png_ptr);
142 else if (!(info_ptr->color_type & PNG_COLOR_MASK_COLOR))
143 png_set_gray_to_rgb(png_ptr);
144
145 /* Add alpha channel, if need be */
146 if (!(png_ptr->color_type & PNG_COLOR_MASK_ALPHA)) {
147 if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
148 png_set_tRNS_to_alpha(png_ptr);
149 else
150 png_set_add_alpha(png_ptr, ~0, PNG_FILLER_AFTER);
151 }
152
153 /* Adjust the byte order, if necessary */
154 png_set_bgr(png_ptr);
155
156 /* Make sure we end up with 8-bit data */
157 if (info_ptr->bit_depth == 16)
158 png_set_strip_16(png_ptr);
159 else if (info_ptr->bit_depth < 8)
160 png_set_packing(png_ptr);
161
162 #if 0
163 if (png_get_bKGD(png_ptr, info_ptr, &image_background))
164 png_set_background(png_ptr, image_background,
165 PNG_BACKGROUND_GAMMA_FILE, 1, 1.0);
166 else
167 png_set_background(png_ptr, &my_background,
168 PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0);
169 #endif
170
171 /* Whew! Now we should get the stuff we want... */
172 rp = (png_bytep)__vesacon_background;
173 for (i = 0; i < (int)info_ptr->height; i++) {
174 row_pointers[i] = rp;
175 rp += __vesa_info.mi.h_res << 2;
176 }
177
178 png_read_image(png_ptr, row_pointers);
179
180 tile_image(info_ptr->width, info_ptr->height);
181
182 rv = 0;
183
184 err:
185 if (png_ptr)
186 png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp) NULL);
187 return rv;
188 }
189
190 static int jpeg_sig_cmp(uint8_t * bytes, int len)
191 {
192 (void)len;
193
194 return (bytes[0] == 0xff && bytes[1] == 0xd8) ? 0 : -1;
195 }
196
197 static int read_jpeg_file(FILE * fp, uint8_t * header, int len)
198 {
199 struct jdec_private *jdec = NULL;
200 void *jpeg_file = NULL;
201 size_t length_of_file;
202 unsigned int width, height;
203 int rv = -1;
204 unsigned char *components[1];
205 unsigned int bytes_per_row[1];
206
207 rv = floadfile(fp, &jpeg_file, &length_of_file, header, len);
208 if (rv)
209 goto err;
210
211 jdec = tinyjpeg_init();
212 if (!jdec)
213 goto err;
214
215 if (tinyjpeg_parse_header(jdec, jpeg_file, length_of_file) < 0)
216 goto err;
217
218 tinyjpeg_get_size(jdec, &width, &height);
219 if (width > __vesa_info.mi.h_res || height > __vesa_info.mi.v_res)
220 goto err;
221
222 components[0] = (void *)__vesacon_background;
223 tinyjpeg_set_components(jdec, components, 1);
224 bytes_per_row[0] = __vesa_info.mi.h_res << 2;
225 tinyjpeg_set_bytes_per_row(jdec, bytes_per_row, 1);
226
227 tinyjpeg_decode(jdec, TINYJPEG_FMT_BGRA32);
228 tile_image(width, height);
229
230 rv = 0;
231
232 err:
233 /* Don't use tinyjpeg_free() here, since we didn't allow tinyjpeg
234 to allocate the frame buffer */
235 if (jdec)
236 free(jdec);
237
238 if (jpeg_file)
239 free(jpeg_file);
240
241 return rv;
242 }
243
244 /* Simple grey Gaussian hole, enough to look interesting */
245 int vesacon_default_background(void)
246 {
247 int x, y, dx, dy, dy2;
248 int z;
249 unsigned int shft;
250 uint8_t *bgptr = (uint8_t *)__vesacon_background;
251 uint8_t k;
252
253 if (__vesacon_pixel_format == PXF_NONE)
254 return 0; /* Not in graphics mode */
255
256 z = max(__vesa_info.mi.v_res, __vesa_info.mi.h_res) >> 1;
257 z = ((z*z) >> 11) - 1;
258 shft = ilog2(z) + 1;
259
260 for (y = 0, dy = -(__vesa_info.mi.v_res >> 1);
261 y < __vesa_info.mi.v_res; y++, dy++) {
262 dy2 = dy * dy;
263 for (x = 0, dx = -(__vesa_info.mi.h_res >> 1);
264 x < __vesa_info.mi.h_res; x++, dx++) {
265 k = __vesacon_linear_to_srgb[500 + ((dx*dx + dy2) >> shft)];
266 bgptr[0] = k; /* Blue */
267 bgptr[1] = k; /* Green */
268 bgptr[2] = k; /* Red */
269 bgptr += 4; /* Dummy alpha */
270 }
271 }
272
273 draw_background();
274 return 0;
275 }
276
277 /* Set the background to a single flat color */
278 int vesacon_set_background(unsigned int rgb)
279 {
280 void *bgptr = __vesacon_background;
281 unsigned int count = __vesa_info.mi.h_res * __vesa_info.mi.v_res;
282
283 if (__vesacon_pixel_format == PXF_NONE)
284 return 0; /* Not in graphics mode */
285
286 asm volatile ("rep; stosl":"+D" (bgptr), "+c"(count)
287 :"a"(rgb)
288 :"memory");
289
290 draw_background();
291 return 0;
292 }
293
294 struct lss16_header {
295 uint32_t magic;
296 uint16_t xsize;
297 uint16_t ysize;
298 };
299
300 #define LSS16_MAGIC 0x1413f33d
301
302 static inline int lss16_sig_cmp(const void *header, int len)
303 {
304 const struct lss16_header *h = header;
305
306 if (len != 8)
307 return 1;
308
309 return !(h->magic == LSS16_MAGIC &&
310 h->xsize <= __vesa_info.mi.h_res &&
311 h->ysize <= __vesa_info.mi.v_res);
312 }
313
314 static int read_lss16_file(FILE * fp, const void *header, int header_len)
315 {
316 const struct lss16_header *h = header;
317 uint32_t colors[16], color;
318 bool has_nybble;
319 uint8_t byte;
320 int count;
321 int nybble, prev;
322 enum state {
323 st_start,
324 st_c0,
325 st_c1,
326 st_c2,
327 } state;
328 int i, x, y;
329 uint32_t *bgptr = __vesacon_background;
330
331 /* Assume the header, 8 bytes, has already been loaded. */
332 if (header_len != 8)
333 return -1;
334
335 for (i = 0; i < 16; i++) {
336 uint8_t rgb[3];
337 if (fread(rgb, 1, 3, fp) != 3)
338 return -1;
339
340 colors[i] = (((rgb[0] & 63) * 255 / 63) << 16) +
341 (((rgb[1] & 63) * 255 / 63) << 8) +
342 ((rgb[2] & 63) * 255 / 63);
343 }
344
345 /* By spec, the state machine is per row */
346 for (y = 0; y < h->ysize; y++) {
347 state = st_start;
348 has_nybble = false;
349 color = colors[prev = 0]; /* By specification */
350 count = 0;
351
352 x = 0;
353 while (x < h->xsize) {
354 if (!has_nybble) {
355 if (fread(&byte, 1, 1, fp) != 1)
356 return -1;
357 nybble = byte & 0xf;
358 has_nybble = true;
359 } else {
360 nybble = byte >> 4;
361 has_nybble = false;
362 }
363
364 switch (state) {
365 case st_start:
366 if (nybble != prev) {
367 *bgptr++ = color = colors[prev = nybble];
368 x++;
369 } else {
370 state = st_c0;
371 }
372 break;
373
374 case st_c0:
375 if (nybble == 0) {
376 state = st_c1;
377 } else {
378 count = nybble;
379 goto do_run;
380 }
381 break;
382
383 case st_c1:
384 count = nybble + 16;
385 state = st_c2;
386 break;
387
388 case st_c2:
389 count += nybble << 4;
390 goto do_run;
391
392 do_run:
393 count = min(count, h->xsize - x);
394 x += count;
395 asm volatile ("rep; stosl":"+D" (bgptr),
396 "+c"(count):"a"(color));
397 state = st_start;
398 break;
399 }
400 }
401
402 /* Zero-fill rest of row */
403 i = __vesa_info.mi.h_res - x;
404 asm volatile ("rep; stosl":"+D" (bgptr), "+c"(i):"a"(0):"memory");
405 }
406
407 /* Zero-fill rest of screen */
408 i = (__vesa_info.mi.v_res - y) * __vesa_info.mi.h_res;
409 asm volatile ("rep; stosl":"+D" (bgptr), "+c"(i):"a"(0):"memory");
410
411 return 0;
412 }
413
414 int vesacon_load_background(const char *filename)
415 {
416 FILE *fp = NULL;
417 uint8_t header[8];
418 int rv = 1;
419
420 if (__vesacon_pixel_format == PXF_NONE)
421 return 0; /* Not in graphics mode */
422
423 fp = fopen(filename, "r");
424
425 if (!fp)
426 goto err;
427
428 if (fread(header, 1, 8, fp) != 8)
429 goto err;
430
431 if (!png_sig_cmp(header, 0, 8)) {
432 rv = read_png_file(fp);
433 } else if (!jpeg_sig_cmp(header, 8)) {
434 rv = read_jpeg_file(fp, header, 8);
435 } else if (!lss16_sig_cmp(header, 8)) {
436 rv = read_lss16_file(fp, header, 8);
437 }
438
439 /* This actually displays the stuff */
440 draw_background();
441
442 err:
443 if (fp)
444 fclose(fp);
445
446 return rv;
447 }
448
449 int __vesacon_init_background(void)
450 {
451 /* __vesacon_background was cleared by calloc() */
452
453 /* The VESA BIOS has already cleared the screen */
454 return 0;
455 }