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 <common.h>
12 #include <bmp_layout.h>
13 #include <command.h>
14 #include <dm.h>
15 #include <gzip.h>
16 #include <log.h>
17 #include <malloc.h>
18 #include <mapmem.h>
19 #include <splash.h>
20 #include <video.h>
21 #include <asm/byteorder.h>
22
23 /*
24 * Allocate and decompress a BMP image using gunzip().
25 *
26 * Returns a pointer to the decompressed image data. This pointer is
27 * aligned to 32-bit-aligned-address + 2.
28 * See doc/README.displaying-bmps for explanation.
29 *
30 * The allocation address is passed to 'alloc_addr' and must be freed
31 * by the caller after use.
32 *
33 * Returns NULL if decompression failed, or if the decompressed data
34 * didn't contain a valid BMP signature or decompression is not enabled in
35 * Kconfig.
36 */
gunzip_bmp(unsigned long addr,unsigned long * lenp,void ** alloc_addr)37 struct bmp_image *gunzip_bmp(unsigned long addr, unsigned long *lenp,
38 void **alloc_addr)
39 {
40 void *dst;
41 unsigned long len;
42 struct bmp_image *bmp;
43
44 if (!CONFIG_IS_ENABLED(VIDEO_BMP_GZIP))
45 return NULL;
46
47 /*
48 * Decompress bmp image
49 */
50 len = CONFIG_VAL(VIDEO_LOGO_MAX_SIZE);
51 /* allocate extra 3 bytes for 32-bit-aligned-address + 2 alignment */
52 dst = malloc(CONFIG_VAL(VIDEO_LOGO_MAX_SIZE) + 3);
53 if (!dst) {
54 puts("Error: malloc in gunzip failed!\n");
55 return NULL;
56 }
57
58 /* align to 32-bit-aligned-address + 2 */
59 bmp = dst + 2;
60
61 if (gunzip(bmp, CONFIG_VAL(VIDEO_LOGO_MAX_SIZE), map_sysmem(addr, 0),
62 &len)) {
63 free(dst);
64 return NULL;
65 }
66 if (len == CONFIG_VAL(VIDEO_LOGO_MAX_SIZE))
67 puts("Image could be truncated (increase CONFIG_VIDEO_LOGO_MAX_SIZE)!\n");
68
69 /*
70 * Check for bmp mark 'BM'
71 */
72 if (!((bmp->header.signature[0] == 'B') &&
73 (bmp->header.signature[1] == 'M'))) {
74 free(dst);
75 return NULL;
76 }
77
78 debug("Gzipped BMP image detected!\n");
79
80 *alloc_addr = dst;
81 return bmp;
82 }
83
84 #ifdef CONFIG_NEEDS_MANUAL_RELOC
bmp_reloc(void)85 void bmp_reloc(void)
86 {
87 fixup_cmdtable(cmd_bmp_sub, ARRAY_SIZE(cmd_bmp_sub));
88 }
89 #endif
90
bmp_info(ulong addr)91 int bmp_info(ulong addr)
92 {
93 struct bmp_image *bmp = (struct bmp_image *)map_sysmem(addr, 0);
94 void *bmp_alloc_addr = NULL;
95 unsigned long len;
96
97 if (!((bmp->header.signature[0] == 'B') &&
98 (bmp->header.signature[1] == 'M')))
99 bmp = gunzip_bmp(addr, &len, &bmp_alloc_addr);
100
101 if (!bmp) {
102 printf("There is no valid bmp file at the given address\n");
103 return 1;
104 }
105
106 printf("Image size : %d x %d\n", le32_to_cpu(bmp->header.width),
107 le32_to_cpu(bmp->header.height));
108 printf("Bits per pixel: %d\n", le16_to_cpu(bmp->header.bit_count));
109 printf("Compression : %d\n", le32_to_cpu(bmp->header.compression));
110
111 if (bmp_alloc_addr)
112 free(bmp_alloc_addr);
113
114 return 0;
115 }
116
bmp_display(ulong addr,int x,int y)117 int bmp_display(ulong addr, int x, int y)
118 {
119 struct udevice *dev;
120 int ret;
121 struct bmp_image *bmp = map_sysmem(addr, 0);
122 void *bmp_alloc_addr = NULL;
123 unsigned long len;
124
125 if (!((bmp->header.signature[0] == 'B') &&
126 (bmp->header.signature[1] == 'M')))
127 bmp = gunzip_bmp(addr, &len, &bmp_alloc_addr);
128
129 if (!bmp) {
130 printf("There is no valid bmp file at the given address\n");
131 return 1;
132 }
133 addr = map_to_sysmem(bmp);
134
135 ret = uclass_first_device_err(UCLASS_VIDEO, &dev);
136 if (!ret) {
137 bool align = false;
138
139 if (x == BMP_ALIGN_CENTER || y == BMP_ALIGN_CENTER)
140 align = true;
141
142 ret = video_bmp_display(dev, addr, x, y, align);
143 }
144
145 if (bmp_alloc_addr)
146 free(bmp_alloc_addr);
147
148 return ret ? CMD_RET_FAILURE : 0;
149 }
150