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6#include <common.h>
7#include <bmp_layout.h>
8#include <dm.h>
9#include <mapmem.h>
10#include <video.h>
11#include <watchdog.h>
12#include <asm/unaligned.h>
13
14#ifdef CONFIG_VIDEO_BMP_RLE8
15#define BMP_RLE8_ESCAPE 0
16#define BMP_RLE8_EOL 0
17#define BMP_RLE8_EOBMP 1
18#define BMP_RLE8_DELTA 2
19
20static void draw_unencoded_bitmap(ushort **fbp, uchar *bmap, ushort *cmap,
21 int cnt)
22{
23 while (cnt > 0) {
24 *(*fbp)++ = cmap[*bmap++];
25 cnt--;
26 }
27}
28
29static void draw_encoded_bitmap(ushort **fbp, ushort col, int cnt)
30{
31 ushort *fb = *fbp;
32
33 while (cnt > 0) {
34 *fb++ = col;
35 cnt--;
36 }
37 *fbp = fb;
38}
39
40static void video_display_rle8_bitmap(struct udevice *dev,
41 struct bmp_image *bmp, ushort *cmap,
42 uchar *fb, int x_off, int y_off)
43{
44 struct video_priv *priv = dev_get_uclass_priv(dev);
45 uchar *bmap;
46 ulong width, height;
47 ulong cnt, runlen;
48 int x, y;
49 int decode = 1;
50
51 debug("%s\n", __func__);
52 width = get_unaligned_le32(&bmp->header.width);
53 height = get_unaligned_le32(&bmp->header.height);
54 bmap = (uchar *)bmp + get_unaligned_le32(&bmp->header.data_offset);
55
56 x = 0;
57 y = height - 1;
58
59 while (decode) {
60 if (bmap[0] == BMP_RLE8_ESCAPE) {
61 switch (bmap[1]) {
62 case BMP_RLE8_EOL:
63
64 bmap += 2;
65 x = 0;
66 y--;
67
68 fb -= (width * 2 + priv->line_length);
69 break;
70 case BMP_RLE8_EOBMP:
71
72 decode = 0;
73 break;
74 case BMP_RLE8_DELTA:
75
76 x += bmap[2];
77 y -= bmap[3];
78
79 fb = (uchar *)(priv->fb + (y + y_off - 1)
80 * priv->line_length + (x + x_off) * 2);
81 bmap += 4;
82 break;
83 default:
84
85 runlen = bmap[1];
86 bmap += 2;
87 if (y < height) {
88 if (x < width) {
89 if (x + runlen > width)
90 cnt = width - x;
91 else
92 cnt = runlen;
93 draw_unencoded_bitmap(
94 (ushort **)&fb,
95 bmap, cmap, cnt);
96 }
97 x += runlen;
98 }
99 bmap += runlen;
100 if (runlen & 1)
101 bmap++;
102 }
103 } else {
104
105 if (y < height) {
106 runlen = bmap[0];
107 if (x < width) {
108
109 while (bmap[0] == 0xff &&
110 bmap[2] != BMP_RLE8_ESCAPE &&
111 bmap[1] == bmap[3]) {
112 runlen += bmap[2];
113 bmap += 2;
114 }
115 if (x + runlen > width)
116 cnt = width - x;
117 else
118 cnt = runlen;
119 draw_encoded_bitmap((ushort **)&fb,
120 cmap[bmap[1]], cnt);
121 }
122 x += runlen;
123 }
124 bmap += 2;
125 }
126 }
127}
128#endif
129
130__weak void fb_put_byte(uchar **fb, uchar **from)
131{
132 *(*fb)++ = *(*from)++;
133}
134
135#if defined(CONFIG_BMP_16BPP)
136__weak void fb_put_word(uchar **fb, uchar **from)
137{
138 *(*fb)++ = *(*from)++;
139 *(*fb)++ = *(*from)++;
140}
141#endif
142
143#define BMP_ALIGN_CENTER 0x7fff
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157
158static void video_splash_align_axis(int *axis, unsigned long panel_size,
159 unsigned long picture_size)
160{
161 unsigned long panel_picture_delta = panel_size - picture_size;
162 unsigned long axis_alignment;
163
164 if (*axis == BMP_ALIGN_CENTER)
165 axis_alignment = panel_picture_delta / 2;
166 else if (*axis < 0)
167 axis_alignment = panel_picture_delta + *axis + 1;
168 else
169 return;
170
171 *axis = max(0, (int)axis_alignment);
172}
173
174static void video_set_cmap(struct udevice *dev,
175 struct bmp_color_table_entry *cte, unsigned colours)
176{
177 struct video_priv *priv = dev_get_uclass_priv(dev);
178 int i;
179 ushort *cmap = priv->cmap;
180
181 debug("%s: colours=%d\n", __func__, colours);
182 for (i = 0; i < colours; ++i) {
183 *cmap = ((cte->red << 8) & 0xf800) |
184 ((cte->green << 3) & 0x07e0) |
185 ((cte->blue >> 3) & 0x001f);
186 cmap++;
187 cte++;
188 }
189}
190
191int video_bmp_display(struct udevice *dev, ulong bmp_image, int x, int y,
192 bool align)
193{
194 struct video_priv *priv = dev_get_uclass_priv(dev);
195 ushort *cmap_base = NULL;
196 int i, j;
197 uchar *fb;
198 struct bmp_image *bmp = map_sysmem(bmp_image, 0);
199 uchar *bmap;
200 ushort padded_width;
201 unsigned long width, height, byte_width;
202 unsigned long pwidth = priv->xsize;
203 unsigned colours, bpix, bmp_bpix;
204 struct bmp_color_table_entry *palette;
205 int hdr_size;
206
207 if (!bmp || !(bmp->header.signature[0] == 'B' &&
208 bmp->header.signature[1] == 'M')) {
209 printf("Error: no valid bmp image at %lx\n", bmp_image);
210
211 return -EINVAL;
212 }
213
214 width = get_unaligned_le32(&bmp->header.width);
215 height = get_unaligned_le32(&bmp->header.height);
216 bmp_bpix = get_unaligned_le16(&bmp->header.bit_count);
217 hdr_size = get_unaligned_le16(&bmp->header.size);
218 debug("hdr_size=%d, bmp_bpix=%d\n", hdr_size, bmp_bpix);
219 palette = (void *)bmp + 14 + hdr_size;
220
221 colours = 1 << bmp_bpix;
222
223 bpix = VNBITS(priv->bpix);
224
225 if (bpix != 1 && bpix != 8 && bpix != 16 && bpix != 32) {
226 printf("Error: %d bit/pixel mode, but BMP has %d bit/pixel\n",
227 bpix, bmp_bpix);
228
229 return -EINVAL;
230 }
231
232
233
234
235
236 if (bpix != bmp_bpix &&
237 !(bmp_bpix == 8 && bpix == 16) &&
238 !(bmp_bpix == 24 && bpix == 32)) {
239 printf("Error: %d bit/pixel mode, but BMP has %d bit/pixel\n",
240 bpix, get_unaligned_le16(&bmp->header.bit_count));
241 return -EPERM;
242 }
243
244 debug("Display-bmp: %d x %d with %d colours, display %d\n",
245 (int)width, (int)height, (int)colours, 1 << bpix);
246
247 if (bmp_bpix == 8)
248 video_set_cmap(dev, palette, colours);
249
250 padded_width = (width & 0x3 ? (width & ~0x3) + 4 : width);
251
252 if (align) {
253 video_splash_align_axis(&x, priv->xsize, width);
254 video_splash_align_axis(&y, priv->ysize, height);
255 }
256
257 if ((x + width) > pwidth)
258 width = pwidth - x;
259 if ((y + height) > priv->ysize)
260 height = priv->ysize - y;
261
262 bmap = (uchar *)bmp + get_unaligned_le32(&bmp->header.data_offset);
263 fb = (uchar *)(priv->fb +
264 (y + height - 1) * priv->line_length + x * bpix / 8);
265
266 switch (bmp_bpix) {
267 case 1:
268 case 8: {
269 cmap_base = priv->cmap;
270#ifdef CONFIG_VIDEO_BMP_RLE8
271 u32 compression = get_unaligned_le32(&bmp->header.compression);
272 debug("compressed %d %d\n", compression, BMP_BI_RLE8);
273 if (compression == BMP_BI_RLE8) {
274 if (bpix != 16) {
275
276 printf("Error: only support 16 bpix");
277 return -EPROTONOSUPPORT;
278 }
279 video_display_rle8_bitmap(dev, bmp, cmap_base, fb, x,
280 y);
281 break;
282 }
283#endif
284
285 if (bpix != 16)
286 byte_width = width;
287 else
288 byte_width = width * 2;
289
290 for (i = 0; i < height; ++i) {
291 WATCHDOG_RESET();
292 for (j = 0; j < width; j++) {
293 if (bpix != 16) {
294 fb_put_byte(&fb, &bmap);
295 } else {
296 *(uint16_t *)fb = cmap_base[*bmap];
297 bmap++;
298 fb += sizeof(uint16_t) / sizeof(*fb);
299 }
300 }
301 bmap += (padded_width - width);
302 fb -= byte_width + priv->line_length;
303 }
304 break;
305 }
306#if defined(CONFIG_BMP_16BPP)
307 case 16:
308 for (i = 0; i < height; ++i) {
309 WATCHDOG_RESET();
310 for (j = 0; j < width; j++)
311 fb_put_word(&fb, &bmap);
312
313 bmap += (padded_width - width) * 2;
314 fb -= width * 2 + priv->line_length;
315 }
316 break;
317#endif
318#if defined(CONFIG_BMP_24BPP)
319 case 24:
320 for (i = 0; i < height; ++i) {
321 for (j = 0; j < width; j++) {
322 *(fb++) = *(bmap++);
323 *(fb++) = *(bmap++);
324 *(fb++) = *(bmap++);
325 *(fb++) = 0;
326 }
327 fb -= priv->line_length + width * (bpix / 8);
328 }
329 break;
330#endif
331#if defined(CONFIG_BMP_32BPP)
332 case 32:
333 for (i = 0; i < height; ++i) {
334 for (j = 0; j < width; j++) {
335 *(fb++) = *(bmap++);
336 *(fb++) = *(bmap++);
337 *(fb++) = *(bmap++);
338 *(fb++) = *(bmap++);
339 }
340 fb -= priv->line_length + width * (bpix / 8);
341 }
342 break;
343#endif
344 default:
345 break;
346 };
347
348 video_sync(dev);
349
350 return 0;
351}
352
353
