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author | Jens Arnold <amiconn@rockbox.org> | 2004-05-19 08:18:25 +0000 |
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committer | Jens Arnold <amiconn@rockbox.org> | 2004-05-19 08:18:25 +0000 |
commit | a05c41377469f52fc8c76494c1e9d8d5a2094f9a (patch) | |
tree | 96e5189563588ad66253913999c80b2ac5591f87 /apps/plugins | |
parent | f4b52b82eaa29ddddf52474cdc995af24080f933 (diff) | |
download | rockbox-a05c41377469f52fc8c76494c1e9d8d5a2094f9a.tar.gz rockbox-a05c41377469f52fc8c76494c1e9d8d5a2094f9a.zip |
First real library version of the grayscale framework
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4641 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/plugins')
-rw-r--r-- | apps/plugins/lib/gray.c | 1538 | ||||
-rw-r--r-- | apps/plugins/lib/gray.h | 80 |
2 files changed, 1618 insertions, 0 deletions
diff --git a/apps/plugins/lib/gray.c b/apps/plugins/lib/gray.c new file mode 100644 index 0000000000..6435f49007 --- /dev/null +++ b/apps/plugins/lib/gray.c | |||
@@ -0,0 +1,1538 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Grayscale framework | ||
11 | * | ||
12 | * Copyright (C) 2004 Jens Arnold | ||
13 | * | ||
14 | * All files in this archive are subject to the GNU General Public License. | ||
15 | * See the file COPYING in the source tree root for full license agreement. | ||
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 | #ifndef SIMULATOR /* not for simulator by now */ | ||
23 | #include "plugin.h" | ||
24 | |||
25 | #ifdef HAVE_LCD_BITMAP /* and also not for the Player */ | ||
26 | #include "gray.h" | ||
27 | |||
28 | /* This is a generic framework to use grayscale display within rockbox | ||
29 | * plugins. It obviously does not work for the player. | ||
30 | */ | ||
31 | |||
32 | /**** internal core functions and definitions ****/ | ||
33 | |||
34 | /* You do not want to touch these if you don't know exactly what you're | ||
35 | * doing. */ | ||
36 | |||
37 | #define GRAY_RUNNING 0x0001 /* grayscale overlay is running */ | ||
38 | #define GRAY_DEFERRED_UPDATE 0x0002 /* lcd_update() requested */ | ||
39 | |||
40 | /* unsigned 16 bit multiplication (a single instruction on the SH) */ | ||
41 | #define MULU16(a, b) (((unsigned short) (a)) * ((unsigned short) (b))) | ||
42 | |||
43 | typedef struct | ||
44 | { | ||
45 | int x; | ||
46 | int by; /* 8-pixel units */ | ||
47 | int width; | ||
48 | int height; | ||
49 | int bheight; /* 8-pixel units */ | ||
50 | int plane_size; | ||
51 | int depth; /* number_of_bitplanes = (number_of_grayscales - 1) */ | ||
52 | int cur_plane; /* for the timer isr */ | ||
53 | unsigned long randmask; /* mask for random value in graypixel() */ | ||
54 | unsigned long flags; /* various flags, see #defines */ | ||
55 | unsigned char *data; /* pointer to start of bitplane data */ | ||
56 | unsigned long *bitpattern; /* pointer to start of pattern table */ | ||
57 | } tGraybuf; | ||
58 | |||
59 | static struct plugin_api *rb = NULL; /* global api struct pointer */ | ||
60 | static tGraybuf *graybuf = NULL; | ||
61 | static short gray_random_buffer; | ||
62 | |||
63 | /* timer interrupt handler: display next bitplane */ | ||
64 | static void gray_timer_isr(void) | ||
65 | { | ||
66 | rb->lcd_blit(graybuf->data + MULU16(graybuf->plane_size, graybuf->cur_plane), | ||
67 | graybuf->x, graybuf->by, graybuf->width, graybuf->bheight, | ||
68 | graybuf->width); | ||
69 | |||
70 | if (++graybuf->cur_plane >= graybuf->depth) | ||
71 | graybuf->cur_plane = 0; | ||
72 | |||
73 | if (graybuf->flags & GRAY_DEFERRED_UPDATE) /* lcd_update() requested? */ | ||
74 | { | ||
75 | int x1 = MAX(graybuf->x, 0); | ||
76 | int x2 = MIN(graybuf->x + graybuf->width, LCD_WIDTH); | ||
77 | int y1 = MAX(graybuf->by << 3, 0); | ||
78 | int y2 = MIN((graybuf->by + graybuf->bheight) << 3, LCD_HEIGHT); | ||
79 | |||
80 | if (y1 > 0) /* refresh part above overlay, full width */ | ||
81 | rb->lcd_update_rect(0, 0, LCD_WIDTH, y1); | ||
82 | |||
83 | if (y2 < LCD_HEIGHT) /* refresh part below overlay, full width */ | ||
84 | rb->lcd_update_rect(0, y2, LCD_WIDTH, LCD_HEIGHT - y2); | ||
85 | |||
86 | if (x1 > 0) /* refresh part to the left of overlay */ | ||
87 | rb->lcd_update_rect(0, y1, x1, y2 - y1); | ||
88 | |||
89 | if (x2 < LCD_WIDTH) /* refresh part to the right of overlay */ | ||
90 | rb->lcd_update_rect(x2, y1, LCD_WIDTH - x2, y2 - y1); | ||
91 | |||
92 | graybuf->flags &= ~GRAY_DEFERRED_UPDATE; /* clear request */ | ||
93 | } | ||
94 | } | ||
95 | |||
96 | /* Set a pixel to a specific bit pattern | ||
97 | * This is the fundamental graphics primitive, asm optimized */ | ||
98 | static void graypixel(int x, int y, unsigned long pattern) | ||
99 | { | ||
100 | register long address, mask, random; | ||
101 | |||
102 | /* Some (pseudo-)random function must be used here to shift the bit | ||
103 | * pattern randomly, otherwise you would get flicker and/or moire. | ||
104 | * Since rand() is relatively slow, I've implemented a simple, but very | ||
105 | * fast pseudo-random generator based on linear congruency in assembler. | ||
106 | * It delivers 16 pseudo-random bits in each iteration. */ | ||
107 | |||
108 | /* simple but fast pseudo-random generator */ | ||
109 | asm( | ||
110 | "mov.w @%1,%0 \n" /* load last value */ | ||
111 | "mov #75,r1 \n" | ||
112 | "mulu %0,r1 \n" /* multiply by 75 */ | ||
113 | "sts macl,%0 \n" /* get result */ | ||
114 | "add #74,%0 \n" /* add another 74 */ | ||
115 | "mov.w %0,@%1 \n" /* store new value */ | ||
116 | /* Since the lower bits are not very random: */ | ||
117 | "shlr8 %0 \n" /* get bits 8..15 (need max. 5) */ | ||
118 | "and %2,%0 \n" /* mask out unneeded bits */ | ||
119 | : /* outputs */ | ||
120 | /* %0 */ "=&r"(random) | ||
121 | : /* inputs */ | ||
122 | /* %1 */ "r"(&gray_random_buffer), | ||
123 | /* %2 */ "r"(graybuf->randmask) | ||
124 | : /* clobbers */ | ||
125 | "r1","macl" | ||
126 | ); | ||
127 | |||
128 | /* precalculate mask and byte address in first bitplane */ | ||
129 | asm( | ||
130 | "mov %3,%0 \n" /* take y as base for address offset */ | ||
131 | "shlr2 %0 \n" /* shift right by 3 (= divide by 8) */ | ||
132 | "shlr %0 \n" | ||
133 | "mulu %0,%2 \n" /* multiply with width */ | ||
134 | "and #7,%3 \n" /* get lower 3 bits of y */ | ||
135 | "sts macl,%0 \n" /* get mulu result */ | ||
136 | "add %4,%0 \n" /* add base + x to get final address */ | ||
137 | |||
138 | "mov %3,%1 \n" /* move lower 3 bits of y out of r0 */ | ||
139 | "mova .pp_table,%3 \n" /* get address of mask table in r0 */ | ||
140 | "bra .pp_end \n" /* skip the table */ | ||
141 | "mov.b @(%3,%1),%1 \n" /* get entry from mask table */ | ||
142 | |||
143 | ".align 2 \n" | ||
144 | ".pp_table: \n" /* mask table */ | ||
145 | ".byte 0x01 \n" | ||
146 | ".byte 0x02 \n" | ||
147 | ".byte 0x04 \n" | ||
148 | ".byte 0x08 \n" | ||
149 | ".byte 0x10 \n" | ||
150 | ".byte 0x20 \n" | ||
151 | ".byte 0x40 \n" | ||
152 | ".byte 0x80 \n" | ||
153 | |||
154 | ".pp_end: \n" | ||
155 | : /* outputs */ | ||
156 | /* %0 */ "=&r"(address), | ||
157 | /* %1 */ "=&r"(mask) | ||
158 | : /* inputs */ | ||
159 | /* %2 */ "r"(graybuf->width), | ||
160 | /* %3 = r0 */ "z"(y), | ||
161 | /* %4 */ "r"(graybuf->data + x) | ||
162 | : /* clobbers */ | ||
163 | "macl" | ||
164 | ); | ||
165 | |||
166 | /* the hard part: set bits in all bitplanes according to pattern */ | ||
167 | asm( | ||
168 | "cmp/hs %1,%5 \n" /* random >= depth ? */ | ||
169 | "bf .p_ntrim \n" | ||
170 | "sub %1,%5 \n" /* yes: random -= depth */ | ||
171 | /* it's sufficient to do this once, since the mask guarantees | ||
172 | * random < 2 * depth */ | ||
173 | ".p_ntrim: \n" | ||
174 | |||
175 | /* calculate some addresses */ | ||
176 | "mulu %4,%1 \n" /* end address offset */ | ||
177 | "not %3,r1 \n" /* get inverse mask (for "and") */ | ||
178 | "sts macl,%1 \n" /* result of mulu */ | ||
179 | "mulu %4,%5 \n" /* address offset of <random>'th plane */ | ||
180 | "add %2,%1 \n" /* end offset -> end address */ | ||
181 | "sts macl,%5 \n" /* result of mulu */ | ||
182 | "add %2,%5 \n" /* address of <random>'th plane */ | ||
183 | "bra .p_start1 \n" | ||
184 | "mov %5,r2 \n" /* copy address */ | ||
185 | |||
186 | /* first loop: set bits from <random>'th bitplane to last */ | ||
187 | ".p_loop1: \n" | ||
188 | "mov.b @r2,r3 \n" /* get data byte */ | ||
189 | "shlr %0 \n" /* shift bit mask, sets t bit */ | ||
190 | "and r1,r3 \n" /* reset bit (-> "white") */ | ||
191 | "bf .p_white1 \n" /* t=0? -> "white" bit */ | ||
192 | "or %3,r3 \n" /* set bit ("black" bit) */ | ||
193 | ".p_white1: \n" | ||
194 | "mov.b r3,@r2 \n" /* store data byte */ | ||
195 | "add %4,r2 \n" /* advance address to next bitplane */ | ||
196 | ".p_start1: \n" | ||
197 | "cmp/hi r2,%1 \n" /* address < end address ? */ | ||
198 | "bt .p_loop1 \n" | ||
199 | |||
200 | "bra .p_start2 \n" | ||
201 | "nop \n" | ||
202 | |||
203 | /* second loop: set bits from first to <random-1>'th bitplane | ||
204 | * Bit setting works the other way round here to equalize average | ||
205 | * execution times for bright and dark pixels */ | ||
206 | ".p_loop2: \n" | ||
207 | "mov.b @%2,r3 \n" /* get data byte */ | ||
208 | "shlr %0 \n" /* shift bit mask, sets t bit */ | ||
209 | "or %3,r3 \n" /* set bit (-> "black") */ | ||
210 | "bt .p_black2 \n" /* t=1? -> "black" bit */ | ||
211 | "and r1,r3 \n" /* reset bit ("white" bit) */ | ||
212 | ".p_black2: \n" | ||
213 | "mov.b r3,@%2 \n" /* store data byte */ | ||
214 | "add %4,%2 \n" /* advance address to next bitplane */ | ||
215 | ".p_start2: \n" | ||
216 | "cmp/hi %2,%5 \n" /* address < <random>'th address ? */ | ||
217 | "bt .p_loop2 \n" | ||
218 | : /* outputs */ | ||
219 | : /* inputs */ | ||
220 | /* %0 */ "r"(pattern), | ||
221 | /* %1 */ "r"(graybuf->depth), | ||
222 | /* %2 */ "r"(address), | ||
223 | /* %3 */ "r"(mask), | ||
224 | /* %4 */ "r"(graybuf->plane_size), | ||
225 | /* %5 */ "r"(random) | ||
226 | : /* clobbers */ | ||
227 | "r1", "r2", "r3", "macl" | ||
228 | ); | ||
229 | } | ||
230 | |||
231 | /* Set 8 pixels to specific gray values at once, asm optimized | ||
232 | * This greatly enhances performance of gray_fillrect() and gray_drawgraymap() | ||
233 | * for larger rectangles and graymaps */ | ||
234 | static void grayblock(int x, int by, unsigned char* src, int stride) | ||
235 | { | ||
236 | /* precalculate the bit patterns with random shifts (same RNG as graypixel, | ||
237 | * see there for an explanation) for all 8 pixels and put them on the | ||
238 | * stack (!) */ | ||
239 | asm( | ||
240 | "mova .gb_reload,r0 \n" /* set default loopback address */ | ||
241 | "tst %1,%1 \n" /* stride == 0 ? */ | ||
242 | "bf .gb_needreload \n" /* no: keep that address */ | ||
243 | "mova .gb_reuse,r0 \n" /* yes: set shortcut (no reload) */ | ||
244 | ".gb_needreload: \n" | ||
245 | "mov r0,r2 \n" /* loopback address to r2 */ | ||
246 | "mov #7,r3 \n" /* loop count in r3: 8 pixels */ | ||
247 | |||
248 | ".align 2 \n" /** load pattern for pixel **/ | ||
249 | ".gb_reload: \n" | ||
250 | "mov.b @%0,r0 \n" /* load src byte */ | ||
251 | "extu.b r0,r0 \n" /* extend unsigned */ | ||
252 | "mulu %2,r0 \n" /* macl = byte * depth; */ | ||
253 | "add %1,%0 \n" /* src += stride; */ | ||
254 | "sts macl,r4 \n" /* r4 = macl; */ | ||
255 | "add r4,r0 \n" /* byte += r4; */ | ||
256 | "shlr8 r0 \n" /* byte >>= 8; */ | ||
257 | "shll2 r0 \n" | ||
258 | "mov.l @(r0,%3),r4 \n" /* r4 = bitpattern[byte]; */ | ||
259 | |||
260 | ".align 2 \n" /** RNG **/ | ||
261 | ".gb_reuse: \n" | ||
262 | "mov.w @%4,r1 \n" /* load last value */ | ||
263 | "mov #75,r0 \n" | ||
264 | "mulu r0,r1 \n" /* multiply by 75 */ | ||
265 | "sts macl,r1 \n" | ||
266 | "add #74,r1 \n" /* add another 74 */ | ||
267 | "mov.w r1,@%4 \n" /* store new value */ | ||
268 | /* Since the lower bits are not very random: */ | ||
269 | "shlr8 r1 \n" /* get bits 8..15 (need max. 5) */ | ||
270 | "and %5,r1 \n" /* mask out unneeded bits */ | ||
271 | |||
272 | "cmp/hs %2,r1 \n" /* random >= depth ? */ | ||
273 | "bf .gb_ntrim \n" | ||
274 | "sub %2,r1 \n" /* yes: random -= depth; */ | ||
275 | ".gb_ntrim: \n" | ||
276 | |||
277 | "mov.l .ashlsi3,r0 \n" /** rotate pattern **/ | ||
278 | "jsr @r0 \n" /* shift r4 left by r1 */ | ||
279 | "mov r1,r5 \n" | ||
280 | |||
281 | "mov %2,r5 \n" | ||
282 | "sub r1,r5 \n" /* r5 = depth - r1 */ | ||
283 | "mov.l .lshrsi3,r1 \n" | ||
284 | "jsr @r1 \n" /* shift r4 right by r5 */ | ||
285 | "mov r0,r1 \n" /* last result stored in r1 */ | ||
286 | |||
287 | "or r1,r0 \n" /* rotated_pattern = r0 | r1 */ | ||
288 | "mov.l r0,@-r15 \n" /* push pattern */ | ||
289 | |||
290 | "cmp/pl r3 \n" /* loop count > 0? */ | ||
291 | "bf .gb_patdone \n" /* no: done */ | ||
292 | |||
293 | "jmp @r2 \n" /* yes: loop */ | ||
294 | "add #-1,r3 \n" /* decrease loop count */ | ||
295 | |||
296 | ".align 2 \n" | ||
297 | ".ashlsi3: \n" /* C library routine: */ | ||
298 | ".long ___ashlsi3 \n" /* shift r4 left by r5, return in r0 */ | ||
299 | ".lshrsi3: \n" /* C library routine: */ | ||
300 | ".long ___lshrsi3 \n" /* shift r4 right by r5, return in r0 */ | ||
301 | /* both routines preserve r4, destroy r5 and take ~16 cycles */ | ||
302 | |||
303 | ".gb_patdone: \n" | ||
304 | : /* outputs */ | ||
305 | : /* inputs */ | ||
306 | /* %0 */ "r"(src), | ||
307 | /* %1 */ "r"(stride), | ||
308 | /* %2 */ "r"(graybuf->depth), | ||
309 | /* %3 */ "r"(graybuf->bitpattern), | ||
310 | /* %4 */ "r"(&gray_random_buffer), | ||
311 | /* %5 */ "r"(graybuf->randmask) | ||
312 | : /* clobbers */ | ||
313 | "r0", "r1", "r2", "r3", "r4", "r5", "macl" | ||
314 | ); | ||
315 | |||
316 | /* calculate start address in first bitplane and end address */ | ||
317 | register unsigned char *address = graybuf->data + x | ||
318 | + MULU16(graybuf->width, by); | ||
319 | register unsigned char *end_addr = address | ||
320 | + MULU16(graybuf->depth, graybuf->plane_size); | ||
321 | |||
322 | /* set the bits for all 8 pixels in all bytes according to the | ||
323 | * precalculated patterns on the stack */ | ||
324 | asm ( | ||
325 | "mov.l @r15+,r1 \n" /* pop all 8 patterns */ | ||
326 | "mov.l @r15+,r2 \n" | ||
327 | "mov.l @r15+,r3 \n" | ||
328 | "mov.l @r15+,r4 \n" | ||
329 | "mov.l @r15+,r5 \n" | ||
330 | "mov.l @r15+,r6 \n" | ||
331 | "mov.l @r15+,r7 \n" | ||
332 | "mov.l @r15+,r8 \n" | ||
333 | |||
334 | ".gb_loop: \n" /* loop for all bitplanes */ | ||
335 | "shlr r1 \n" /* rotate lsb of pattern 1 to t bit */ | ||
336 | "rotcl r0 \n" /* rotate t bit into r0 */ | ||
337 | "shlr r2 \n" | ||
338 | "rotcl r0 \n" | ||
339 | "shlr r3 \n" | ||
340 | "rotcl r0 \n" | ||
341 | "shlr r4 \n" | ||
342 | "rotcl r0 \n" | ||
343 | "shlr r5 \n" | ||
344 | "rotcl r0 \n" | ||
345 | "shlr r6 \n" | ||
346 | "rotcl r0 \n" | ||
347 | "shlr r7 \n" | ||
348 | "rotcl r0 \n" | ||
349 | "shlr r8 \n" | ||
350 | "rotcl r0 \n" | ||
351 | "mov.b r0,@%0 \n" /* store byte to bitplane */ | ||
352 | "add %2,%0 \n" /* advance to next bitplane */ | ||
353 | "cmp/hi %0,%1 \n" /* last bitplane done? */ | ||
354 | "bt .gb_loop \n" /* no: loop */ | ||
355 | : /* outputs */ | ||
356 | : /* inputs */ | ||
357 | /* %0 */ "r"(address), | ||
358 | /* %1 */ "r"(end_addr), | ||
359 | /* %2 */ "r"(graybuf->plane_size) | ||
360 | : /* clobbers */ | ||
361 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8" | ||
362 | ); | ||
363 | } | ||
364 | |||
365 | /* Invert the bits for 1-8 pixels within the buffer */ | ||
366 | static void grayinvertmasked(int x, int by, unsigned char mask) | ||
367 | { | ||
368 | asm( | ||
369 | "mulu %4,%5 \n" /* width * by (offset of row) */ | ||
370 | "mov #0,r1 \n" /* current_plane = 0 */ | ||
371 | "sts macl,r2 \n" /* get mulu result */ | ||
372 | "add r2,%1 \n" /* -> address in 1st bitplane */ | ||
373 | |||
374 | ".i_loop: \n" | ||
375 | "mov.b @%1,r2 \n" /* get data byte */ | ||
376 | "add #1,r1 \n" /* current_plane++; */ | ||
377 | "xor %2,r2 \n" /* invert bits */ | ||
378 | "mov.b r2,@%1 \n" /* store data byte */ | ||
379 | "add %3,%1 \n" /* advance address to next bitplane */ | ||
380 | "cmp/hi r1,%0 \n" /* current_plane < depth ? */ | ||
381 | "bt .i_loop \n" | ||
382 | : /* outputs */ | ||
383 | : /* inputs */ | ||
384 | /* %0 */ "r"(graybuf->depth), | ||
385 | /* %1 */ "r"(graybuf->data + x), | ||
386 | /* %2 */ "r"(mask), | ||
387 | /* %3 */ "r"(graybuf->plane_size), | ||
388 | /* %4 */ "r"(graybuf->width), | ||
389 | /* %5 */ "r"(by) | ||
390 | : /* clobbers */ | ||
391 | "r1", "r2", "macl" | ||
392 | ); | ||
393 | } | ||
394 | |||
395 | /*** public core functions ***/ | ||
396 | |||
397 | /* Initialize the framework */ | ||
398 | void gray_init(struct plugin_api* newrb) | ||
399 | { | ||
400 | rb = newrb; | ||
401 | } | ||
402 | |||
403 | /* Prepare the grayscale display buffer | ||
404 | * | ||
405 | * arguments: | ||
406 | * gbuf = pointer to the memory area to use (e.g. plugin buffer) | ||
407 | * gbuf_size = max usable size of the buffer | ||
408 | * width = width in pixels (1..112) | ||
409 | * bheight = height in 8-pixel units (1..8) | ||
410 | * depth = desired number of shades - 1 (1..32) | ||
411 | * | ||
412 | * result: | ||
413 | * = depth if there was enough memory | ||
414 | * < depth if there wasn't enough memory. The number of displayable | ||
415 | * shades is smaller than desired, but it still works | ||
416 | * = 0 if there wasn't even enough memory for 1 bitplane (black & white) | ||
417 | * | ||
418 | * You can request any depth from 1 to 32, not just powers of 2. The routine | ||
419 | * performs "graceful degradation" if the memory is not sufficient for the | ||
420 | * desired depth. As long as there is at least enough memory for 1 bitplane, | ||
421 | * it creates as many bitplanes as fit into memory, although 1 bitplane will | ||
422 | * only deliver black & white display. | ||
423 | * | ||
424 | * The total memory needed can be calculated as follows: | ||
425 | * total_mem = | ||
426 | * sizeof(tGraymap) (= 48 bytes currently) | ||
427 | * + sizeof(long) (= 4 bytes) | ||
428 | * + (width * bheight + sizeof(long)) * depth | ||
429 | * + 0..3 (longword alignment of grayscale display buffer) | ||
430 | */ | ||
431 | int gray_init_buffer(unsigned char *gbuf, int gbuf_size, int width, | ||
432 | int bheight, int depth) | ||
433 | { | ||
434 | int possible_depth, plane_size; | ||
435 | int i, j; | ||
436 | |||
437 | if (rb == NULL || (unsigned) width > LCD_WIDTH | ||
438 | || (unsigned) bheight > (LCD_HEIGHT/8) | ||
439 | || depth < 1) | ||
440 | return 0; | ||
441 | |||
442 | while ((unsigned long)gbuf & 3) /* the buffer has to be long aligned */ | ||
443 | { | ||
444 | gbuf++; | ||
445 | gbuf_size--; | ||
446 | } | ||
447 | |||
448 | plane_size = width * bheight; | ||
449 | possible_depth = (gbuf_size - sizeof(tGraybuf) - sizeof(unsigned long)) | ||
450 | / (plane_size + sizeof(unsigned long)); | ||
451 | |||
452 | if (possible_depth < 1) | ||
453 | return 0; | ||
454 | |||
455 | depth = MIN(depth, 32); | ||
456 | depth = MIN(depth, possible_depth); | ||
457 | |||
458 | graybuf = (tGraybuf *) gbuf; /* global pointer to buffer structure */ | ||
459 | |||
460 | graybuf->x = 0; | ||
461 | graybuf->by = 0; | ||
462 | graybuf->width = width; | ||
463 | graybuf->height = bheight << 3; | ||
464 | graybuf->bheight = bheight; | ||
465 | graybuf->plane_size = plane_size; | ||
466 | graybuf->depth = depth; | ||
467 | graybuf->cur_plane = 0; | ||
468 | graybuf->flags = 0; | ||
469 | graybuf->data = gbuf + sizeof(tGraybuf); | ||
470 | graybuf->bitpattern = (unsigned long *) (graybuf->data | ||
471 | + depth * plane_size); | ||
472 | |||
473 | i = depth; | ||
474 | j = 8; | ||
475 | while (i != 0) | ||
476 | { | ||
477 | i >>= 1; | ||
478 | j--; | ||
479 | } | ||
480 | graybuf->randmask = 0xFF >> j; | ||
481 | |||
482 | /* initial state is all white */ | ||
483 | rb->memset(graybuf->data, 0, depth * plane_size); | ||
484 | |||
485 | /* Precalculate the bit patterns for all possible pixel values */ | ||
486 | for (i = 0; i <= depth; i++) | ||
487 | { | ||
488 | unsigned long pattern = 0; | ||
489 | int value = 0; | ||
490 | |||
491 | for (j = 0; j < depth; j++) | ||
492 | { | ||
493 | pattern <<= 1; | ||
494 | value += i; | ||
495 | |||
496 | if (value >= depth) | ||
497 | value -= depth; /* "white" bit */ | ||
498 | else | ||
499 | pattern |= 1; /* "black" bit */ | ||
500 | } | ||
501 | /* now the lower <depth> bits contain the pattern */ | ||
502 | |||
503 | graybuf->bitpattern[i] = pattern; | ||
504 | } | ||
505 | |||
506 | return depth; | ||
507 | } | ||
508 | |||
509 | /* Release the grayscale display buffer | ||
510 | * | ||
511 | * Switches the grayscale overlay off at first if it is still running, | ||
512 | * then sets the pointer to NULL. | ||
513 | * DO CALL either this function or at least gray_show_display(false) | ||
514 | * before you exit, otherwise nasty things may happen. | ||
515 | */ | ||
516 | void gray_release_buffer(void) | ||
517 | { | ||
518 | gray_show_display(false); | ||
519 | graybuf = NULL; | ||
520 | } | ||
521 | |||
522 | /* Set position of the top left corner of the grayscale overlay | ||
523 | * | ||
524 | * arguments: | ||
525 | * x = left margin in pixels | ||
526 | * by = top margin in 8-pixel units | ||
527 | * | ||
528 | * You may set this in a way that the overlay spills across the right or | ||
529 | * bottom display border. In this case it will simply be clipped by the | ||
530 | * LCD controller. You can even set negative values, this will clip at the | ||
531 | * left or top border. I did not test it, but the limits may be +127 / -128 | ||
532 | * | ||
533 | * If you use this while the grayscale overlay is running, the now-freed area | ||
534 | * will be restored. | ||
535 | */ | ||
536 | void gray_position_display(int x, int by) | ||
537 | { | ||
538 | if (graybuf == NULL) | ||
539 | return; | ||
540 | |||
541 | graybuf->x = x; | ||
542 | graybuf->by = by; | ||
543 | |||
544 | if (graybuf->flags & GRAY_RUNNING) | ||
545 | graybuf->flags |= GRAY_DEFERRED_UPDATE; | ||
546 | } | ||
547 | |||
548 | /* Switch the grayscale overlay on or off | ||
549 | * | ||
550 | * arguments: | ||
551 | * enable = true: the grayscale overlay is switched on if initialized | ||
552 | * = false: the grayscale overlay is switched off and the regular lcd | ||
553 | * content is restored | ||
554 | * | ||
555 | * DO NOT call lcd_update() or any other api function that directly accesses | ||
556 | * the lcd while the grayscale overlay is running! If you need to do | ||
557 | * lcd_update() to update something outside the grayscale overlay area, use | ||
558 | * gray_deferred_update() instead. | ||
559 | * | ||
560 | * Other functions to avoid are: | ||
561 | * lcd_blit() (obviously), lcd_update_rect(), lcd_set_contrast(), | ||
562 | * lcd_set_invert_display(), lcd_set_flip(), lcd_roll() | ||
563 | * | ||
564 | * The grayscale display consumes ~50 % CPU power (for a full screen overlay, | ||
565 | * less if the overlay is smaller) when switched on. You can switch the overlay | ||
566 | * on and off as many times as you want. | ||
567 | */ | ||
568 | void gray_show_display(bool enable) | ||
569 | { | ||
570 | if (graybuf == NULL) | ||
571 | return; | ||
572 | |||
573 | if (enable) | ||
574 | { | ||
575 | graybuf->flags |= GRAY_RUNNING; | ||
576 | rb->plugin_register_timer(FREQ / 67, 1, gray_timer_isr); | ||
577 | } | ||
578 | else | ||
579 | { | ||
580 | rb->plugin_unregister_timer(); | ||
581 | graybuf->flags &= ~GRAY_RUNNING; | ||
582 | rb->lcd_update(); /* restore whatever there was before */ | ||
583 | } | ||
584 | } | ||
585 | |||
586 | /*** public optional functions ***/ | ||
587 | |||
588 | /* Here are the various graphics primitives. Cut out functions you do not | ||
589 | * need in order to keep plugin code size down. | ||
590 | */ | ||
591 | |||
592 | /* Clear the grayscale display (sets all pixels to white) | ||
593 | */ | ||
594 | void gray_clear_display(void) | ||
595 | { | ||
596 | if (graybuf == NULL) | ||
597 | return; | ||
598 | |||
599 | rb->memset(graybuf->data, 0, MULU16(graybuf->depth, graybuf->plane_size)); | ||
600 | } | ||
601 | |||
602 | /* Set the grayscale display to all black | ||
603 | */ | ||
604 | void gray_black_display(void) | ||
605 | { | ||
606 | if (graybuf == NULL) | ||
607 | return; | ||
608 | |||
609 | rb->memset(graybuf->data, 0xFF, MULU16(graybuf->depth, graybuf->plane_size)); | ||
610 | } | ||
611 | |||
612 | /* Do an lcd_update() to show changes done by rb->lcd_xxx() functions (in areas | ||
613 | * of the screen not covered by the grayscale overlay). If the grayscale | ||
614 | * overlay is running, the update will be done in the next call of the | ||
615 | * interrupt routine, otherwise it will be performed right away. See also | ||
616 | * comment for the gray_show_display() function. | ||
617 | */ | ||
618 | void gray_deferred_update(void) | ||
619 | { | ||
620 | if (graybuf != NULL && (graybuf->flags & GRAY_RUNNING)) | ||
621 | graybuf->flags |= GRAY_DEFERRED_UPDATE; | ||
622 | else | ||
623 | rb->lcd_update(); | ||
624 | } | ||
625 | |||
626 | /* Scroll the whole grayscale buffer left by <count> pixels | ||
627 | * | ||
628 | * black_border determines if the pixels scrolled in at the right are black | ||
629 | * or white | ||
630 | * | ||
631 | * Scrolling left/right by an even pixel count is almost twice as fast as | ||
632 | * scrolling by an odd pixel count. | ||
633 | */ | ||
634 | void gray_scroll_left(int count, bool black_border) | ||
635 | { | ||
636 | int by, d; | ||
637 | unsigned char *ptr; | ||
638 | unsigned char filler; | ||
639 | |||
640 | if (graybuf == NULL || (unsigned) count >= (unsigned) graybuf->width) | ||
641 | return; | ||
642 | |||
643 | if (black_border) | ||
644 | filler = 0xFF; | ||
645 | else | ||
646 | filler = 0; | ||
647 | |||
648 | /* Scroll row by row to minimize flicker (byte rows = 8 pixels each) */ | ||
649 | for (by = 0; by < graybuf->bheight; by++) | ||
650 | { | ||
651 | ptr = graybuf->data + MULU16(graybuf->width, by); | ||
652 | for (d = 0; d < graybuf->depth; d++) | ||
653 | { | ||
654 | if (count & 1) /* odd count: scroll byte-wise */ | ||
655 | asm volatile ( | ||
656 | ".sl_loop1: \n" | ||
657 | "mov.b @%0+,r1 \n" | ||
658 | "mov.b r1,@(%2,%0) \n" | ||
659 | "cmp/hi %0,%1 \n" | ||
660 | "bt .sl_loop1 \n" | ||
661 | : /* outputs */ | ||
662 | : /* inputs */ | ||
663 | /* %0 */ "r"(ptr + count), | ||
664 | /* %1 */ "r"(ptr + graybuf->width), | ||
665 | /* %2 */ "z"(-count - 1) | ||
666 | : /* clobbers */ | ||
667 | "r1" | ||
668 | ); | ||
669 | else /* even count: scroll word-wise */ | ||
670 | asm volatile ( | ||
671 | ".sl_loop2: \n" | ||
672 | "mov.w @%0+,r1 \n" | ||
673 | "mov.w r1,@(%2,%0) \n" | ||
674 | "cmp/hi %0,%1 \n" | ||
675 | "bt .sl_loop2 \n" | ||
676 | : /* outputs */ | ||
677 | : /* inputs */ | ||
678 | /* %0 */ "r"(ptr + count), | ||
679 | /* %1 */ "r"(ptr + graybuf->width), | ||
680 | /* %2 */ "z"(-count - 2) | ||
681 | : /* clobbers */ | ||
682 | "r1" | ||
683 | ); | ||
684 | |||
685 | rb->memset(ptr + graybuf->width - count, filler, count); | ||
686 | ptr += graybuf->plane_size; | ||
687 | } | ||
688 | } | ||
689 | } | ||
690 | |||
691 | /* Scroll the whole grayscale buffer right by <count> pixels | ||
692 | * | ||
693 | * black_border determines if the pixels scrolled in at the left are black | ||
694 | * or white | ||
695 | * | ||
696 | * Scrolling left/right by an even pixel count is almost twice as fast as | ||
697 | * scrolling by an odd pixel count. | ||
698 | */ | ||
699 | void gray_scroll_right(int count, bool black_border) | ||
700 | { | ||
701 | int by, d; | ||
702 | unsigned char *ptr; | ||
703 | unsigned char filler; | ||
704 | |||
705 | if (graybuf == NULL || (unsigned) count >= (unsigned) graybuf->width) | ||
706 | return; | ||
707 | |||
708 | if (black_border) | ||
709 | filler = 0xFF; | ||
710 | else | ||
711 | filler = 0; | ||
712 | |||
713 | /* Scroll row by row to minimize flicker (byte rows = 8 pixels each) */ | ||
714 | for (by = 0; by < graybuf->bheight; by++) | ||
715 | { | ||
716 | ptr = graybuf->data + MULU16(graybuf->width, by); | ||
717 | for (d = 0; d < graybuf->depth; d++) | ||
718 | { | ||
719 | if (count & 1) /* odd count: scroll byte-wise */ | ||
720 | asm volatile ( | ||
721 | ".sr_loop1: \n" | ||
722 | "mov.b @(%2,%0),r1 \n" | ||
723 | "mov.b r1,@-%0 \n" | ||
724 | "cmp/hi %1,%0 \n" | ||
725 | "bt .sr_loop1 \n" | ||
726 | : /* outputs */ | ||
727 | : /* inputs */ | ||
728 | /* %0 */ "r"(ptr + graybuf->width), | ||
729 | /* %1 */ "r"(ptr + count), | ||
730 | /* %2 */ "z"(-count - 1) | ||
731 | : /* clobbers */ | ||
732 | "r1" | ||
733 | ); | ||
734 | else /* even count: scroll word-wise */ | ||
735 | asm volatile ( | ||
736 | ".sr_loop2: \n" | ||
737 | "mov.w @(%2,%0),r1 \n" | ||
738 | "mov.w r1,@-%0 \n" | ||
739 | "cmp/hi %1,%0 \n" | ||
740 | "bt .sr_loop2 \n" | ||
741 | : /* outputs */ | ||
742 | : /* inputs */ | ||
743 | /* %0 */ "r"(ptr + graybuf->width), | ||
744 | /* %1 */ "r"(ptr + count), | ||
745 | /* %2 */ "z"(-count - 2) | ||
746 | : /* clobbers */ | ||
747 | "r1" | ||
748 | ); | ||
749 | |||
750 | rb->memset(ptr, filler, count); | ||
751 | ptr += graybuf->plane_size; | ||
752 | } | ||
753 | } | ||
754 | } | ||
755 | |||
756 | /* Scroll the whole grayscale buffer up by 8 pixels | ||
757 | * | ||
758 | * black_border determines if the pixels scrolled in at the bottom are black | ||
759 | * or white | ||
760 | * | ||
761 | * Scrolling up/down by 8 pixels is very fast. | ||
762 | */ | ||
763 | void gray_scroll_up8(bool black_border) | ||
764 | { | ||
765 | int by, d; | ||
766 | unsigned char *ptr; | ||
767 | unsigned char filler; | ||
768 | |||
769 | if (graybuf == NULL) | ||
770 | return; | ||
771 | |||
772 | if (black_border) | ||
773 | filler = 0xFF; | ||
774 | else | ||
775 | filler = 0; | ||
776 | |||
777 | /* Scroll row by row to minimize flicker (byte rows = 8 pixels each) */ | ||
778 | for (by = 1; by < graybuf->bheight; by++) | ||
779 | { | ||
780 | ptr = graybuf->data + MULU16(graybuf->width, by); | ||
781 | for (d = 0; d < graybuf->depth; d++) | ||
782 | { | ||
783 | rb->memcpy(ptr - graybuf->width, ptr, graybuf->width); | ||
784 | ptr += graybuf->plane_size; | ||
785 | } | ||
786 | } | ||
787 | /* fill last row */ | ||
788 | ptr = graybuf->data + graybuf->plane_size - graybuf->width; | ||
789 | for (d = 0; d < graybuf->depth; d++) | ||
790 | { | ||
791 | rb->memset(ptr, filler, graybuf->width); | ||
792 | ptr += graybuf->plane_size; | ||
793 | } | ||
794 | } | ||
795 | |||
796 | /* Scroll the whole grayscale buffer down by 8 pixels | ||
797 | * | ||
798 | * black_border determines if the pixels scrolled in at the top are black | ||
799 | * or white | ||
800 | * | ||
801 | * Scrolling up/down by 8 pixels is very fast. | ||
802 | */ | ||
803 | void gray_scroll_down8(bool black_border) | ||
804 | { | ||
805 | int by, d; | ||
806 | unsigned char *ptr; | ||
807 | unsigned char filler; | ||
808 | |||
809 | if (graybuf == NULL) | ||
810 | return; | ||
811 | |||
812 | if (black_border) | ||
813 | filler = 0xFF; | ||
814 | else | ||
815 | filler = 0; | ||
816 | |||
817 | /* Scroll row by row to minimize flicker (byte rows = 8 pixels each) */ | ||
818 | for (by = graybuf->bheight - 1; by > 0; by--) | ||
819 | { | ||
820 | ptr = graybuf->data + MULU16(graybuf->width, by); | ||
821 | for (d = 0; d < graybuf->depth; d++) | ||
822 | { | ||
823 | rb->memcpy(ptr, ptr - graybuf->width, graybuf->width); | ||
824 | ptr += graybuf->plane_size; | ||
825 | } | ||
826 | } | ||
827 | /* fill first row */ | ||
828 | ptr = graybuf->data; | ||
829 | for (d = 0; d < graybuf->depth; d++) | ||
830 | { | ||
831 | rb->memset(ptr, filler, graybuf->width); | ||
832 | ptr += graybuf->plane_size; | ||
833 | } | ||
834 | } | ||
835 | |||
836 | /* Scroll the whole grayscale buffer up by <count> pixels (<= 7) | ||
837 | * | ||
838 | * black_border determines if the pixels scrolled in at the bottom are black | ||
839 | * or white | ||
840 | * | ||
841 | * Scrolling up/down pixel-wise is significantly slower than scrolling | ||
842 | * left/right or scrolling up/down byte-wise because it involves bit | ||
843 | * shifting. That's why it is asm optimized. | ||
844 | */ | ||
845 | void gray_scroll_up(int count, bool black_border) | ||
846 | { | ||
847 | unsigned long filler; | ||
848 | |||
849 | if (graybuf == NULL || (unsigned) count > 7) | ||
850 | return; | ||
851 | |||
852 | if (black_border) | ||
853 | filler = 0xFF; | ||
854 | else | ||
855 | filler = 0; | ||
856 | |||
857 | /* scroll column by column to minimize flicker */ | ||
858 | asm( | ||
859 | "mov #0,r6 \n" /* x = 0 */ | ||
860 | "mova .su_shifttbl,r0 \n" /* calculate jump destination for */ | ||
861 | "mov.b @(r0,%6),%6 \n" /* shift amount from table */ | ||
862 | "bra .su_cloop \n" /* skip table */ | ||
863 | "add r0,%6 \n" | ||
864 | |||
865 | ".align 2 \n" | ||
866 | ".su_shifttbl: \n" /* shift jump offset table */ | ||
867 | ".byte .su_shift0 - .su_shifttbl \n" | ||
868 | ".byte .su_shift1 - .su_shifttbl \n" | ||
869 | ".byte .su_shift2 - .su_shifttbl \n" | ||
870 | ".byte .su_shift3 - .su_shifttbl \n" | ||
871 | ".byte .su_shift4 - .su_shifttbl \n" | ||
872 | ".byte .su_shift5 - .su_shifttbl \n" | ||
873 | ".byte .su_shift6 - .su_shifttbl \n" | ||
874 | ".byte .su_shift7 - .su_shifttbl \n" | ||
875 | |||
876 | ".su_cloop: \n" /* repeat for every column */ | ||
877 | "mov %1,r2 \n" /* get start address */ | ||
878 | "mov #0,r3 \n" /* current_plane = 0 */ | ||
879 | |||
880 | ".su_oloop: \n" /* repeat for every bitplane */ | ||
881 | "mov r2,r4 \n" /* get start address */ | ||
882 | "mov #0,r5 \n" /* current_row = 0 */ | ||
883 | "mov %5,r1 \n" /* get filler bits */ | ||
884 | |||
885 | ".su_iloop: \n" /* repeat for all rows */ | ||
886 | "sub %2,r4 \n" /* address -= width */ | ||
887 | "mov.b @r4,r0 \n" /* get data byte */ | ||
888 | "shll8 r1 \n" /* old data to 2nd byte */ | ||
889 | "extu.b r0,r0 \n" /* extend unsigned */ | ||
890 | "or r1,r0 \n" /* combine old data */ | ||
891 | "jmp @%6 \n" /* jump into shift "path" */ | ||
892 | "extu.b r0,r1 \n" /* store data for next round */ | ||
893 | |||
894 | ".su_shift6: \n" /* shift right by 0..7 bits */ | ||
895 | "shlr2 r0 \n" | ||
896 | ".su_shift4: \n" | ||
897 | "shlr2 r0 \n" | ||
898 | ".su_shift2: \n" | ||
899 | "bra .su_shift0 \n" | ||
900 | "shlr2 r0 \n" | ||
901 | ".su_shift7: \n" | ||
902 | "shlr2 r0 \n" | ||
903 | ".su_shift5: \n" | ||
904 | "shlr2 r0 \n" | ||
905 | ".su_shift3: \n" | ||
906 | "shlr2 r0 \n" | ||
907 | ".su_shift1: \n" | ||
908 | "shlr r0 \n" | ||
909 | ".su_shift0: \n" | ||
910 | |||
911 | "mov.b r0,@r4 \n" /* store data */ | ||
912 | "add #1,r5 \n" /* current_row++ */ | ||
913 | "cmp/hi r5,%3 \n" /* current_row < bheight ? */ | ||
914 | "bt .su_iloop \n" | ||
915 | |||
916 | "add %4,r2 \n" /* start_address += plane_size */ | ||
917 | "add #1,r3 \n" /* current_plane++ */ | ||
918 | "cmp/hi r3,%0 \n" /* current_plane < depth ? */ | ||
919 | "bt .su_oloop \n" | ||
920 | |||
921 | "add #1,%1 \n" /* start_address++ */ | ||
922 | "add #1,r6 \n" /* x++ */ | ||
923 | "cmp/hi r6,%2 \n" /* x < width ? */ | ||
924 | "bt .su_cloop \n" | ||
925 | : /* outputs */ | ||
926 | : /* inputs */ | ||
927 | /* %0 */ "r"(graybuf->depth), | ||
928 | /* %1 */ "r"(graybuf->data + graybuf->plane_size), | ||
929 | /* %2 */ "r"(graybuf->width), | ||
930 | /* %3 */ "r"(graybuf->bheight), | ||
931 | /* %4 */ "r"(graybuf->plane_size), | ||
932 | /* %5 */ "r"(filler), | ||
933 | /* %6 */ "r"(count) | ||
934 | : /* clobbers */ | ||
935 | "r0", "r1", "r2", "r3", "r4", "r5", "r6" | ||
936 | ); | ||
937 | } | ||
938 | |||
939 | /* Scroll the whole grayscale buffer down by <count> pixels (<= 7) | ||
940 | * | ||
941 | * black_border determines if the pixels scrolled in at the top are black | ||
942 | * or white | ||
943 | * | ||
944 | * Scrolling up/down pixel-wise is significantly slower than scrolling | ||
945 | * left/right or scrolling up/down byte-wise because it involves bit | ||
946 | * shifting. That's why it is asm optimized. | ||
947 | */ | ||
948 | void gray_scroll_down(int count, bool black_border) | ||
949 | { | ||
950 | unsigned long filler; | ||
951 | |||
952 | if (graybuf == NULL || (unsigned) count > 7) | ||
953 | return; | ||
954 | |||
955 | if (black_border) | ||
956 | filler = 0xFF << count; /* calculate filler bits */ | ||
957 | else | ||
958 | filler = 0; | ||
959 | |||
960 | /* scroll column by column to minimize flicker */ | ||
961 | asm( | ||
962 | "mov #0,r6 \n" /* x = 0 */ | ||
963 | "mova .sd_shifttbl,r0 \n" /* calculate jump destination for */ | ||
964 | "mov.b @(r0,%6),%6 \n" /* shift amount from table */ | ||
965 | "bra .sd_cloop \n" /* skip table */ | ||
966 | "add r0,%6 \n" | ||
967 | |||
968 | ".align 2 \n" | ||
969 | ".sd_shifttbl: \n" /* shift jump offset table */ | ||
970 | ".byte .sd_shift0 - .sd_shifttbl \n" | ||
971 | ".byte .sd_shift1 - .sd_shifttbl \n" | ||
972 | ".byte .sd_shift2 - .sd_shifttbl \n" | ||
973 | ".byte .sd_shift3 - .sd_shifttbl \n" | ||
974 | ".byte .sd_shift4 - .sd_shifttbl \n" | ||
975 | ".byte .sd_shift5 - .sd_shifttbl \n" | ||
976 | ".byte .sd_shift6 - .sd_shifttbl \n" | ||
977 | ".byte .sd_shift7 - .sd_shifttbl \n" | ||
978 | |||
979 | ".sd_cloop: \n" /* repeat for every column */ | ||
980 | "mov %1,r2 \n" /* get start address */ | ||
981 | "mov #0,r3 \n" /* current_plane = 0 */ | ||
982 | |||
983 | ".sd_oloop: \n" /* repeat for every bitplane */ | ||
984 | "mov r2,r4 \n" /* get start address */ | ||
985 | "mov #0,r5 \n" /* current_row = 0 */ | ||
986 | "mov %5,r1 \n" /* get filler bits */ | ||
987 | |||
988 | ".sd_iloop: \n" /* repeat for all rows */ | ||
989 | "shlr8 r1 \n" /* shift right to get residue */ | ||
990 | "mov.b @r4,r0 \n" /* get data byte */ | ||
991 | "jmp @%6 \n" /* jump into shift "path" */ | ||
992 | "extu.b r0,r0 \n" /* extend unsigned */ | ||
993 | |||
994 | ".sd_shift6: \n" /* shift left by 0..7 bits */ | ||
995 | "shll2 r0 \n" | ||
996 | ".sd_shift4: \n" | ||
997 | "shll2 r0 \n" | ||
998 | ".sd_shift2: \n" | ||
999 | "bra .sd_shift0 \n" | ||
1000 | "shll2 r0 \n" | ||
1001 | ".sd_shift7: \n" | ||
1002 | "shll2 r0 \n" | ||
1003 | ".sd_shift5: \n" | ||
1004 | "shll2 r0 \n" | ||
1005 | ".sd_shift3: \n" | ||
1006 | "shll2 r0 \n" | ||
1007 | ".sd_shift1: \n" | ||
1008 | "shll r0 \n" | ||
1009 | ".sd_shift0: \n" | ||
1010 | |||
1011 | "or r0,r1 \n" /* combine with last residue */ | ||
1012 | "mov.b r1,@r4 \n" /* store data */ | ||
1013 | "add %2,r4 \n" /* address += width */ | ||
1014 | "add #1,r5 \n" /* current_row++ */ | ||
1015 | "cmp/hi r5,%3 \n" /* current_row < bheight ? */ | ||
1016 | "bt .sd_iloop \n" | ||
1017 | |||
1018 | "add %4,r2 \n" /* start_address += plane_size */ | ||
1019 | "add #1,r3 \n" /* current_plane++ */ | ||
1020 | "cmp/hi r3,%0 \n" /* current_plane < depth ? */ | ||
1021 | "bt .sd_oloop \n" | ||
1022 | |||
1023 | "add #1,%1 \n" /* start_address++ */ | ||
1024 | "add #1,r6 \n" /* x++ */ | ||
1025 | "cmp/hi r6,%2 \n" /* x < width ? */ | ||
1026 | "bt .sd_cloop \n" | ||
1027 | : /* outputs */ | ||
1028 | : /* inputs */ | ||
1029 | /* %0 */ "r"(graybuf->depth), | ||
1030 | /* %1 */ "r"(graybuf->data), | ||
1031 | /* %2 */ "r"(graybuf->width), | ||
1032 | /* %3 */ "r"(graybuf->bheight), | ||
1033 | /* %4 */ "r"(graybuf->plane_size), | ||
1034 | /* %5 */ "r"(filler), | ||
1035 | /* %6 */ "r"(count) | ||
1036 | : /* clobbers */ | ||
1037 | "r0", "r1", "r2", "r3", "r4", "r5", "r6" | ||
1038 | ); | ||
1039 | } | ||
1040 | |||
1041 | /* Set a pixel to a specific gray value | ||
1042 | * | ||
1043 | * brightness is 0..255 (black to white) regardless of real bit depth | ||
1044 | */ | ||
1045 | void gray_drawpixel(int x, int y, int brightness) | ||
1046 | { | ||
1047 | if (graybuf == NULL | ||
1048 | || (unsigned) x >= (unsigned) graybuf->width | ||
1049 | || (unsigned) y >= (unsigned) graybuf->height | ||
1050 | || (unsigned) brightness > 255) | ||
1051 | return; | ||
1052 | |||
1053 | graypixel(x, y, graybuf->bitpattern[MULU16(brightness, | ||
1054 | graybuf->depth + 1) >> 8]); | ||
1055 | } | ||
1056 | |||
1057 | /* Invert a pixel | ||
1058 | * | ||
1059 | * The bit pattern for that pixel in the buffer is inverted, so white becomes | ||
1060 | * black, light gray becomes dark gray etc. | ||
1061 | */ | ||
1062 | void gray_invertpixel(int x, int y) | ||
1063 | { | ||
1064 | if (graybuf == NULL | ||
1065 | || (unsigned) x >= (unsigned) graybuf->width | ||
1066 | || (unsigned) y >= (unsigned) graybuf->height) | ||
1067 | return; | ||
1068 | |||
1069 | grayinvertmasked(x, (y >> 3), 1 << (y & 7)); | ||
1070 | } | ||
1071 | |||
1072 | /* Draw a line from (x1, y1) to (x2, y2) with a specific gray value | ||
1073 | * | ||
1074 | * brightness is 0..255 (black to white) regardless of real bit depth | ||
1075 | */ | ||
1076 | void gray_drawline(int x1, int y1, int x2, int y2, int brightness) | ||
1077 | { | ||
1078 | int numpixels; | ||
1079 | int i; | ||
1080 | int deltax, deltay; | ||
1081 | int d, dinc1, dinc2; | ||
1082 | int x, xinc1, xinc2; | ||
1083 | int y, yinc1, yinc2; | ||
1084 | unsigned long pattern; | ||
1085 | |||
1086 | if (graybuf == NULL | ||
1087 | || (unsigned) x1 >= (unsigned) graybuf->width | ||
1088 | || (unsigned) y1 >= (unsigned) graybuf->height | ||
1089 | || (unsigned) x2 >= (unsigned) graybuf->width | ||
1090 | || (unsigned) y2 >= (unsigned) graybuf->height | ||
1091 | || (unsigned) brightness > 255) | ||
1092 | return; | ||
1093 | |||
1094 | pattern = graybuf->bitpattern[MULU16(brightness, graybuf->depth + 1) >> 8]; | ||
1095 | |||
1096 | deltax = abs(x2 - x1); | ||
1097 | deltay = abs(y2 - y1); | ||
1098 | xinc2 = 1; | ||
1099 | yinc2 = 1; | ||
1100 | |||
1101 | if (deltax >= deltay) | ||
1102 | { | ||
1103 | numpixels = deltax; | ||
1104 | d = 2 * deltay - deltax; | ||
1105 | dinc1 = deltay * 2; | ||
1106 | dinc2 = (deltay - deltax) * 2; | ||
1107 | xinc1 = 1; | ||
1108 | yinc1 = 0; | ||
1109 | } | ||
1110 | else | ||
1111 | { | ||
1112 | numpixels = deltay; | ||
1113 | d = 2 * deltax - deltay; | ||
1114 | dinc1 = deltax * 2; | ||
1115 | dinc2 = (deltax - deltay) * 2; | ||
1116 | xinc1 = 0; | ||
1117 | yinc1 = 1; | ||
1118 | } | ||
1119 | numpixels++; /* include endpoints */ | ||
1120 | |||
1121 | if (x1 > x2) | ||
1122 | { | ||
1123 | xinc1 = -xinc1; | ||
1124 | xinc2 = -xinc2; | ||
1125 | } | ||
1126 | |||
1127 | if (y1 > y2) | ||
1128 | { | ||
1129 | yinc1 = -yinc1; | ||
1130 | yinc2 = -yinc2; | ||
1131 | } | ||
1132 | |||
1133 | x = x1; | ||
1134 | y = y1; | ||
1135 | |||
1136 | for (i=0; i<numpixels; i++) | ||
1137 | { | ||
1138 | graypixel(x, y, pattern); | ||
1139 | |||
1140 | if (d < 0) | ||
1141 | { | ||
1142 | d += dinc1; | ||
1143 | x += xinc1; | ||
1144 | y += yinc1; | ||
1145 | } | ||
1146 | else | ||
1147 | { | ||
1148 | d += dinc2; | ||
1149 | x += xinc2; | ||
1150 | y += yinc2; | ||
1151 | } | ||
1152 | } | ||
1153 | } | ||
1154 | |||
1155 | /* Invert a line from (x1, y1) to (x2, y2) | ||
1156 | * | ||
1157 | * The bit patterns for the pixels of the line are inverted, so white becomes | ||
1158 | * black, light gray becomes dark gray etc. | ||
1159 | */ | ||
1160 | void gray_invertline(int x1, int y1, int x2, int y2) | ||
1161 | { | ||
1162 | int numpixels; | ||
1163 | int i; | ||
1164 | int deltax, deltay; | ||
1165 | int d, dinc1, dinc2; | ||
1166 | int x, xinc1, xinc2; | ||
1167 | int y, yinc1, yinc2; | ||
1168 | |||
1169 | if (graybuf == NULL | ||
1170 | || (unsigned) x1 >= (unsigned) graybuf->width | ||
1171 | || (unsigned) y1 >= (unsigned) graybuf->height | ||
1172 | || (unsigned) x2 >= (unsigned) graybuf->width | ||
1173 | || (unsigned) y2 >= (unsigned) graybuf->height) | ||
1174 | return; | ||
1175 | |||
1176 | deltax = abs(x2 - x1); | ||
1177 | deltay = abs(y2 - y1); | ||
1178 | xinc2 = 1; | ||
1179 | yinc2 = 1; | ||
1180 | |||
1181 | if (deltax >= deltay) | ||
1182 | { | ||
1183 | numpixels = deltax; | ||
1184 | d = 2 * deltay - deltax; | ||
1185 | dinc1 = deltay * 2; | ||
1186 | dinc2 = (deltay - deltax) * 2; | ||
1187 | xinc1 = 1; | ||
1188 | yinc1 = 0; | ||
1189 | } | ||
1190 | else | ||
1191 | { | ||
1192 | numpixels = deltay; | ||
1193 | d = 2 * deltax - deltay; | ||
1194 | dinc1 = deltax * 2; | ||
1195 | dinc2 = (deltax - deltay) * 2; | ||
1196 | xinc1 = 0; | ||
1197 | yinc1 = 1; | ||
1198 | } | ||
1199 | numpixels++; /* include endpoints */ | ||
1200 | |||
1201 | if (x1 > x2) | ||
1202 | { | ||
1203 | xinc1 = -xinc1; | ||
1204 | xinc2 = -xinc2; | ||
1205 | } | ||
1206 | |||
1207 | if (y1 > y2) | ||
1208 | { | ||
1209 | yinc1 = -yinc1; | ||
1210 | yinc2 = -yinc2; | ||
1211 | } | ||
1212 | |||
1213 | x = x1; | ||
1214 | y = y1; | ||
1215 | |||
1216 | for (i=0; i<numpixels; i++) | ||
1217 | { | ||
1218 | grayinvertmasked(x, (y >> 3), 1 << (y & 7)); | ||
1219 | |||
1220 | if (d < 0) | ||
1221 | { | ||
1222 | d += dinc1; | ||
1223 | x += xinc1; | ||
1224 | y += yinc1; | ||
1225 | } | ||
1226 | else | ||
1227 | { | ||
1228 | d += dinc2; | ||
1229 | x += xinc2; | ||
1230 | y += yinc2; | ||
1231 | } | ||
1232 | } | ||
1233 | } | ||
1234 | |||
1235 | /* Draw a (hollow) rectangle with a specific gray value, | ||
1236 | * corners are (x1, y1) and (x2, y2) | ||
1237 | * | ||
1238 | * brightness is 0..255 (black to white) regardless of real bit depth | ||
1239 | */ | ||
1240 | void gray_drawrect(int x1, int y1, int x2, int y2, int brightness) | ||
1241 | { | ||
1242 | int x, y; | ||
1243 | unsigned long pattern; | ||
1244 | unsigned char srcpixel; | ||
1245 | |||
1246 | if (graybuf == NULL | ||
1247 | || (unsigned) x1 >= (unsigned) graybuf->width | ||
1248 | || (unsigned) y1 >= (unsigned) graybuf->height | ||
1249 | || (unsigned) x2 >= (unsigned) graybuf->width | ||
1250 | || (unsigned) y2 >= (unsigned) graybuf->height | ||
1251 | || (unsigned) brightness > 255) | ||
1252 | return; | ||
1253 | |||
1254 | if (y1 > y2) | ||
1255 | { | ||
1256 | y = y1; | ||
1257 | y1 = y2; | ||
1258 | y2 = y; | ||
1259 | } | ||
1260 | if (x1 > x2) | ||
1261 | { | ||
1262 | x = x1; | ||
1263 | x1 = x2; | ||
1264 | x2 = x; | ||
1265 | } | ||
1266 | |||
1267 | pattern = graybuf->bitpattern[MULU16(brightness, graybuf->depth + 1) >> 8]; | ||
1268 | srcpixel = brightness; | ||
1269 | |||
1270 | for (x = x1 + 1; x < x2; x++) | ||
1271 | { | ||
1272 | graypixel(x, y1, pattern); | ||
1273 | graypixel(x, y2, pattern); | ||
1274 | } | ||
1275 | for (y = y1; y <= y2; ) | ||
1276 | { | ||
1277 | if (!(y & 7) && (y2 - y >= 7)) | ||
1278 | /* current row byte aligned in fb & at least 8 rows left */ | ||
1279 | { | ||
1280 | /* shortcut: draw all 8 rows at once: 2..3 times faster */ | ||
1281 | grayblock(x1, y >> 3, &srcpixel, 0); | ||
1282 | grayblock(x2, y >> 3, &srcpixel, 0); | ||
1283 | y += 8; | ||
1284 | } | ||
1285 | else | ||
1286 | { | ||
1287 | graypixel(x1, y, pattern); | ||
1288 | graypixel(x2, y, pattern); | ||
1289 | y++; | ||
1290 | } | ||
1291 | } | ||
1292 | } | ||
1293 | |||
1294 | /* Fill a rectangle with a specific gray value | ||
1295 | * corners are (x1, y1) and (x2, y2) | ||
1296 | * | ||
1297 | * brightness is 0..255 (black to white) regardless of real bit depth | ||
1298 | */ | ||
1299 | void gray_fillrect(int x1, int y1, int x2, int y2, int brightness) | ||
1300 | { | ||
1301 | int x, y; | ||
1302 | unsigned long pattern; | ||
1303 | unsigned char srcpixel; | ||
1304 | |||
1305 | if (graybuf == NULL | ||
1306 | || (unsigned) x1 >= (unsigned) graybuf->width | ||
1307 | || (unsigned) y1 >= (unsigned) graybuf->height | ||
1308 | || (unsigned) x2 >= (unsigned) graybuf->width | ||
1309 | || (unsigned) y2 >= (unsigned) graybuf->height | ||
1310 | || (unsigned) brightness > 255) | ||
1311 | return; | ||
1312 | |||
1313 | if (y1 > y2) | ||
1314 | { | ||
1315 | y = y1; | ||
1316 | y1 = y2; | ||
1317 | y2 = y; | ||
1318 | } | ||
1319 | if (x1 > x2) | ||
1320 | { | ||
1321 | x = x1; | ||
1322 | x1 = x2; | ||
1323 | x2 = x; | ||
1324 | } | ||
1325 | |||
1326 | pattern = graybuf->bitpattern[MULU16(brightness, graybuf->depth + 1) >> 8]; | ||
1327 | srcpixel = brightness; | ||
1328 | |||
1329 | for (y = y1; y <= y2; ) | ||
1330 | { | ||
1331 | if (!(y & 7) && (y2 - y >= 7)) | ||
1332 | /* current row byte aligned in fb & at least 8 rows left */ | ||
1333 | { | ||
1334 | for (x = x1; x <= x2; x++) | ||
1335 | { | ||
1336 | /* shortcut: draw all 8 rows at once: 2..3 times faster */ | ||
1337 | grayblock(x, y >> 3, &srcpixel, 0); | ||
1338 | } | ||
1339 | y += 8; | ||
1340 | } | ||
1341 | else | ||
1342 | { | ||
1343 | for (x = x1; x <= x2; x++) | ||
1344 | { | ||
1345 | graypixel(x, y, pattern); | ||
1346 | } | ||
1347 | y++; | ||
1348 | } | ||
1349 | } | ||
1350 | } | ||
1351 | |||
1352 | /* Invert a (solid) rectangle, corners are (x1, y1) and (x2, y2) | ||
1353 | * | ||
1354 | * The bit patterns for all pixels of the rectangle are inverted, so white | ||
1355 | * becomes black, light gray becomes dark gray etc. This is the fastest of | ||
1356 | * all gray_xxxrect() functions! Perfectly suited for cursors. | ||
1357 | */ | ||
1358 | void gray_invertrect(int x1, int y1, int x2, int y2) | ||
1359 | { | ||
1360 | int x, yb, yb1, yb2; | ||
1361 | unsigned char mask; | ||
1362 | |||
1363 | if (graybuf == NULL | ||
1364 | || (unsigned) x1 >= (unsigned) graybuf->width | ||
1365 | || (unsigned) y1 >= (unsigned) graybuf->height | ||
1366 | || (unsigned) x2 >= (unsigned) graybuf->width | ||
1367 | || (unsigned) y2 >= (unsigned) graybuf->height) | ||
1368 | return; | ||
1369 | |||
1370 | if (y1 > y2) | ||
1371 | { | ||
1372 | yb = y1; | ||
1373 | y1 = y2; | ||
1374 | y2 = yb; | ||
1375 | } | ||
1376 | if (x1 > x2) | ||
1377 | { | ||
1378 | x = x1; | ||
1379 | x1 = x2; | ||
1380 | x2 = x; | ||
1381 | } | ||
1382 | |||
1383 | yb1 = y1 >> 3; | ||
1384 | yb2 = y2 >> 3; | ||
1385 | |||
1386 | if (yb1 == yb2) | ||
1387 | { | ||
1388 | mask = 0xFF << (y1 & 7); | ||
1389 | mask &= 0xFF >> (7 - (y2 & 7)); | ||
1390 | |||
1391 | for (x = x1; x <= x2; x++) | ||
1392 | grayinvertmasked(x, yb1, mask); | ||
1393 | } | ||
1394 | else | ||
1395 | { | ||
1396 | mask = 0xFF << (y1 & 7); | ||
1397 | |||
1398 | for (x = x1; x <= x2; x++) | ||
1399 | grayinvertmasked(x, yb1, mask); | ||
1400 | |||
1401 | for (yb = yb1 + 1; yb < yb2; yb++) | ||
1402 | { | ||
1403 | for (x = x1; x <= x2; x++) | ||
1404 | grayinvertmasked(x, yb, 0xFF); | ||
1405 | } | ||
1406 | |||
1407 | mask = 0xFF >> (7 - (y2 & 7)); | ||
1408 | |||
1409 | for (x = x1; x <= x2; x++) | ||
1410 | grayinvertmasked(x, yb2, mask); | ||
1411 | } | ||
1412 | } | ||
1413 | |||
1414 | /* Copy a grayscale bitmap into the display | ||
1415 | * | ||
1416 | * A grayscale bitmap contains one byte for every pixel that defines the | ||
1417 | * brightness of the pixel (0..255). Bytes are read in row-major order. | ||
1418 | * The <stride> parameter is useful if you want to show only a part of a | ||
1419 | * bitmap. It should always be set to the "row length" of the bitmap, so | ||
1420 | * for displaying the whole bitmap, nx == stride. | ||
1421 | */ | ||
1422 | void gray_drawgraymap(unsigned char *src, int x, int y, int nx, int ny, | ||
1423 | int stride) | ||
1424 | { | ||
1425 | int xi, yi; | ||
1426 | unsigned char *row; | ||
1427 | |||
1428 | if (graybuf == NULL | ||
1429 | || (unsigned) x >= (unsigned) graybuf->width | ||
1430 | || (unsigned) y >= (unsigned) graybuf->height) | ||
1431 | return; | ||
1432 | |||
1433 | if ((y + ny) >= graybuf->height) /* clip bottom */ | ||
1434 | ny = graybuf->height - y; | ||
1435 | |||
1436 | if ((x + nx) >= graybuf->width) /* clip right */ | ||
1437 | nx = graybuf->width - x; | ||
1438 | |||
1439 | for (yi = y; yi < y + ny; ) | ||
1440 | { | ||
1441 | row = src; | ||
1442 | |||
1443 | if (!(yi & 7) && (y + ny - yi > 7)) | ||
1444 | /* current row byte aligned in fb & at least 8 rows left */ | ||
1445 | { | ||
1446 | for (xi = x; xi < x + nx; xi++) | ||
1447 | { | ||
1448 | /* shortcut: draw all 8 rows at once: 2..3 times faster */ | ||
1449 | grayblock(xi, yi >> 3, row++, stride); | ||
1450 | } | ||
1451 | yi += 8; | ||
1452 | src += stride << 3; | ||
1453 | } | ||
1454 | else | ||
1455 | { | ||
1456 | for (xi = x; xi < x + nx; xi++) | ||
1457 | { | ||
1458 | graypixel(xi, yi, graybuf->bitpattern[MULU16(*row++, | ||
1459 | graybuf->depth + 1) >> 8]); | ||
1460 | } | ||
1461 | yi++; | ||
1462 | src += stride; | ||
1463 | } | ||
1464 | } | ||
1465 | } | ||
1466 | |||
1467 | /* Display a bitmap with specific foreground and background gray values | ||
1468 | * | ||
1469 | * This (now) uses the same bitmap format as the core b&w graphics routines, | ||
1470 | * so you can use bmp2rb to generate bitmaps for use with this function as | ||
1471 | * well. | ||
1472 | * | ||
1473 | * A bitmap contains one bit for every pixel that defines if that pixel is | ||
1474 | * foreground (1) or background (0). Bits within a byte are arranged | ||
1475 | * vertically, LSB at top. | ||
1476 | * The bytes are stored in row-major order, with byte 0 being top left, | ||
1477 | * byte 1 2nd from left etc. The first row of bytes defines pixel rows | ||
1478 | * 0..7, the second row defines pixel row 8..15 etc. | ||
1479 | * | ||
1480 | * The <stride> parameter is useful if you want to show only a part of a | ||
1481 | * bitmap. It should always be set to the "row length" of the bitmap. | ||
1482 | * | ||
1483 | * If draw_bg is false, only foreground pixels are drawn, so the background | ||
1484 | * is transparent. In this case bg_brightness is ignored. | ||
1485 | */ | ||
1486 | void gray_drawbitmap(unsigned char *src, int x, int y, int nx, int ny, | ||
1487 | int stride, bool draw_bg, int fg_brightness, | ||
1488 | int bg_brightness) | ||
1489 | { | ||
1490 | int xi, dy; | ||
1491 | int bits = 0; /* Have to initialize to prevent warning */ | ||
1492 | unsigned long fg_pattern, bg_pattern; | ||
1493 | unsigned char *col; | ||
1494 | |||
1495 | if (graybuf == NULL | ||
1496 | || (unsigned) x >= (unsigned) graybuf->width | ||
1497 | || (unsigned) y >= (unsigned) graybuf->height | ||
1498 | || (unsigned) fg_brightness > 255 | ||
1499 | || (unsigned) bg_brightness > 255) | ||
1500 | return; | ||
1501 | |||
1502 | if ((y + ny) >= graybuf->height) /* clip bottom */ | ||
1503 | ny = graybuf->height - y; | ||
1504 | |||
1505 | if ((x + nx) >= graybuf->width) /* clip right */ | ||
1506 | nx = graybuf->width - x; | ||
1507 | |||
1508 | fg_pattern = graybuf->bitpattern[MULU16(fg_brightness, | ||
1509 | graybuf->depth + 1) >> 8]; | ||
1510 | |||
1511 | bg_pattern = graybuf->bitpattern[MULU16(bg_brightness, | ||
1512 | graybuf->depth + 1) >> 8]; | ||
1513 | |||
1514 | for (xi = x; xi < x + nx; xi++) | ||
1515 | { | ||
1516 | col = src++; | ||
1517 | for (dy = 0; dy < ny; dy++) | ||
1518 | { | ||
1519 | if (!(dy & 7)) /* get next 8 bits */ | ||
1520 | { | ||
1521 | bits = (int)(*col); | ||
1522 | col += stride; | ||
1523 | } | ||
1524 | |||
1525 | if (bits & 0x01) | ||
1526 | graypixel(xi, y + dy, fg_pattern); | ||
1527 | else | ||
1528 | if (draw_bg) | ||
1529 | graypixel(xi, y + dy, bg_pattern); | ||
1530 | |||
1531 | bits >>= 1; | ||
1532 | } | ||
1533 | } | ||
1534 | } | ||
1535 | |||
1536 | #endif // #ifdef HAVE_LCD_BITMAP | ||
1537 | #endif // #ifndef SIMULATOR | ||
1538 | |||
diff --git a/apps/plugins/lib/gray.h b/apps/plugins/lib/gray.h new file mode 100644 index 0000000000..64bc4dd8a5 --- /dev/null +++ b/apps/plugins/lib/gray.h | |||
@@ -0,0 +1,80 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Grayscale framework | ||
11 | * | ||
12 | * Copyright (C) 2004 Jens Arnold | ||
13 | * | ||
14 | * All files in this archive are subject to the GNU General Public License. | ||
15 | * See the file COPYING in the source tree root for full license agreement. | ||
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 | #ifndef __GRAY_H__ | ||
23 | #define __GRAY_H__ | ||
24 | |||
25 | #ifndef SIMULATOR /* not for simulator by now */ | ||
26 | #include "plugin.h" | ||
27 | |||
28 | #ifdef HAVE_LCD_BITMAP /* and also not for the Player */ | ||
29 | |||
30 | /* This is a generic framework to use grayscale display within rockbox | ||
31 | * plugins. It obviously does not work for the player. | ||
32 | */ | ||
33 | |||
34 | /* every framework needs such a function, and it has to be called as | ||
35 | * the very first one */ | ||
36 | void gray_init(struct plugin_api* newrb); | ||
37 | |||
38 | /* general functions */ | ||
39 | int gray_init_buffer(unsigned char *gbuf, int gbuf_size, int width, | ||
40 | int bheight, int depth); | ||
41 | void gray_release_buffer(void); | ||
42 | void gray_position_display(int x, int by); | ||
43 | void gray_show_display(bool enable); | ||
44 | |||
45 | /* functions affecting the whole display */ | ||
46 | void gray_clear_display(void); | ||
47 | void gray_black_display(void); | ||
48 | void gray_deferred_update(void); | ||
49 | |||
50 | /* scrolling functions */ | ||
51 | void gray_scroll_left(int count, bool black_border); | ||
52 | void gray_scroll_right(int count, bool black_border); | ||
53 | void gray_scroll_up8(bool black_border); | ||
54 | void gray_scroll_down8(bool black_border); | ||
55 | void gray_scroll_up(int count, bool black_border); | ||
56 | void gray_scroll_down(int count, bool black_border); | ||
57 | |||
58 | /* pixel functions */ | ||
59 | void gray_drawpixel(int x, int y, int brightness); | ||
60 | void gray_invertpixel(int x, int y); | ||
61 | |||
62 | /* line functions */ | ||
63 | void gray_drawline(int x1, int y1, int x2, int y2, int brightness); | ||
64 | void gray_invertline(int x1, int y1, int x2, int y2); | ||
65 | |||
66 | /* rectangle functions */ | ||
67 | void gray_drawrect(int x1, int y1, int x2, int y2, int brightness); | ||
68 | void gray_fillrect(int x1, int y1, int x2, int y2, int brightness); | ||
69 | void gray_invertrect(int x1, int y1, int x2, int y2); | ||
70 | |||
71 | /* bitmap functions */ | ||
72 | void gray_drawgraymap(unsigned char *src, int x, int y, int nx, int ny, | ||
73 | int stride); | ||
74 | void gray_drawbitmap(unsigned char *src, int x, int y, int nx, int ny, | ||
75 | int stride, bool draw_bg, int fg_brightness, | ||
76 | int bg_brightness); | ||
77 | |||
78 | #endif /* HAVE_LCD_BITMAP */ | ||
79 | #endif /* SIMULATOR */ | ||
80 | #endif /* __GRAY_H__ */ | ||