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"Das U-Boot" Source Tree
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * (C) Copyright 2002
4 * Detlev Zundel, DENX Software Engineering, dzu@denx.de.
5 */
6
7/*
8 * BMP handling routines
9 */
10
11#include <bmp_layout.h>
12#include <command.h>
13#include <dm.h>
14#include <gzip.h>
15#include <log.h>
16#include <malloc.h>
17#include <mapmem.h>
18#include <splash.h>
19#include <video.h>
20#include <asm/byteorder.h>
21
22/*
23 * Allocate and decompress a BMP image using gunzip().
24 *
25 * Returns a pointer to the decompressed image data. This pointer is
26 * aligned to 32-bit-aligned-address + 2.
27 * See doc/README.displaying-bmps for explanation.
28 *
29 * The allocation address is passed to 'alloc_addr' and must be freed
30 * by the caller after use.
31 *
32 * Returns NULL if decompression failed, or if the decompressed data
33 * didn't contain a valid BMP signature or decompression is not enabled in
34 * Kconfig.
35 */
36struct bmp_image *gunzip_bmp(unsigned long addr, unsigned long *lenp,
37 void **alloc_addr)
38{
39 void *dst;
40 unsigned long len;
41 struct bmp_image *bmp;
42
43 if (!CONFIG_IS_ENABLED(VIDEO_BMP_GZIP))
44 return NULL;
45
46 /*
47 * Decompress bmp image
48 */
49 len = CONFIG_VAL(VIDEO_LOGO_MAX_SIZE);
50 /* allocate extra 3 bytes for 32-bit-aligned-address + 2 alignment */
51 dst = malloc(CONFIG_VAL(VIDEO_LOGO_MAX_SIZE) + 3);
52 if (!dst) {
53 puts("Error: malloc in gunzip failed!\n");
54 return NULL;
55 }
56
57 /* align to 32-bit-aligned-address + 2 */
58 bmp = dst + 2;
59
60 if (gunzip(bmp, CONFIG_VAL(VIDEO_LOGO_MAX_SIZE), map_sysmem(addr, 0),
61 &len)) {
62 free(dst);
63 return NULL;
64 }
65 if (len == CONFIG_VAL(VIDEO_LOGO_MAX_SIZE))
66 puts("Image could be truncated (increase CONFIG_VIDEO_LOGO_MAX_SIZE)!\n");
67
68 /*
69 * Check for bmp mark 'BM'
70 */
71 if (!((bmp->header.signature[0] == 'B') &&
72 (bmp->header.signature[1] == 'M'))) {
73 free(dst);
74 return NULL;
75 }
76
77 debug("Gzipped BMP image detected!\n");
78
79 *alloc_addr = dst;
80 return bmp;
81}
82
83int bmp_info(ulong addr)
84{
85 struct bmp_image *bmp = (struct bmp_image *)map_sysmem(addr, 0);
86 void *bmp_alloc_addr = NULL;
87 unsigned long len;
88
89 if (!((bmp->header.signature[0] == 'B') &&
90 (bmp->header.signature[1] == 'M')))
91 bmp = gunzip_bmp(addr, &len, &bmp_alloc_addr);
92
93 if (!bmp) {
94 printf("There is no valid bmp file at the given address\n");
95 return 1;
96 }
97
98 printf("Image size : %d x %d\n", le32_to_cpu(bmp->header.width),
99 le32_to_cpu(bmp->header.height));
100 printf("Bits per pixel: %d\n", le16_to_cpu(bmp->header.bit_count));
101 printf("Compression : %d\n", le32_to_cpu(bmp->header.compression));
102
103 if (bmp_alloc_addr)
104 free(bmp_alloc_addr);
105
106 return 0;
107}
108
109int bmp_display(ulong addr, int x, int y)
110{
111 struct udevice *dev;
112 int ret;
113 struct bmp_image *bmp = map_sysmem(addr, 0);
114 void *bmp_alloc_addr = NULL;
115 unsigned long len;
116
117 if (!((bmp->header.signature[0] == 'B') &&
118 (bmp->header.signature[1] == 'M')))
119 bmp = gunzip_bmp(addr, &len, &bmp_alloc_addr);
120
121 if (!bmp) {
122 printf("There is no valid bmp file at the given address\n");
123 return 1;
124 }
125 addr = map_to_sysmem(bmp);
126
127 ret = uclass_first_device_err(UCLASS_VIDEO, &dev);
128 if (!ret) {
129 bool align = false;
130
131 if (x == BMP_ALIGN_CENTER || y == BMP_ALIGN_CENTER)
132 align = true;
133
134 ret = video_bmp_display(dev, addr, x, y, align);
135 }
136
137 if (bmp_alloc_addr)
138 free(bmp_alloc_addr);
139
140 return ret ? CMD_RET_FAILURE : 0;
141}