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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2002
* Detlev Zundel, DENX Software Engineering, dzu@denx.de.
*/
/*
* BMP handling routines
*/
#include <common.h>
#include <bmp_layout.h>
#include <command.h>
#include <dm.h>
#include <gzip.h>
#include <log.h>
#include <malloc.h>
#include <mapmem.h>
#include <splash.h>
#include <video.h>
#include <asm/byteorder.h>
/*
* Allocate and decompress a BMP image using gunzip().
*
* Returns a pointer to the decompressed image data. This pointer is
* aligned to 32-bit-aligned-address + 2.
* See doc/README.displaying-bmps for explanation.
*
* The allocation address is passed to 'alloc_addr' and must be freed
* by the caller after use.
*
* Returns NULL if decompression failed, or if the decompressed data
* didn't contain a valid BMP signature or decompression is not enabled in
* Kconfig.
*/
struct bmp_image *gunzip_bmp(unsigned long addr, unsigned long *lenp,
void **alloc_addr)
{
void *dst;
unsigned long len;
struct bmp_image *bmp;
if (!CONFIG_IS_ENABLED(VIDEO_BMP_GZIP))
return NULL;
/*
* Decompress bmp image
*/
len = CONFIG_VAL(VIDEO_LOGO_MAX_SIZE);
/* allocate extra 3 bytes for 32-bit-aligned-address + 2 alignment */
dst = malloc(CONFIG_VAL(VIDEO_LOGO_MAX_SIZE) + 3);
if (!dst) {
puts("Error: malloc in gunzip failed!\n");
return NULL;
}
/* align to 32-bit-aligned-address + 2 */
bmp = dst + 2;
if (gunzip(bmp, CONFIG_VAL(VIDEO_LOGO_MAX_SIZE), map_sysmem(addr, 0),
&len)) {
free(dst);
return NULL;
}
if (len == CONFIG_VAL(VIDEO_LOGO_MAX_SIZE))
puts("Image could be truncated (increase CONFIG_VIDEO_LOGO_MAX_SIZE)!\n");
/*
* Check for bmp mark 'BM'
*/
if (!((bmp->header.signature[0] == 'B') &&
(bmp->header.signature[1] == 'M'))) {
free(dst);
return NULL;
}
debug("Gzipped BMP image detected!\n");
*alloc_addr = dst;
return bmp;
}
int bmp_info(ulong addr)
{
struct bmp_image *bmp = (struct bmp_image *)map_sysmem(addr, 0);
void *bmp_alloc_addr = NULL;
unsigned long len;
if (!((bmp->header.signature[0] == 'B') &&
(bmp->header.signature[1] == 'M')))
bmp = gunzip_bmp(addr, &len, &bmp_alloc_addr);
if (!bmp) {
printf("There is no valid bmp file at the given address\n");
return 1;
}
printf("Image size : %d x %d\n", le32_to_cpu(bmp->header.width),
le32_to_cpu(bmp->header.height));
printf("Bits per pixel: %d\n", le16_to_cpu(bmp->header.bit_count));
printf("Compression : %d\n", le32_to_cpu(bmp->header.compression));
if (bmp_alloc_addr)
free(bmp_alloc_addr);
return 0;
}
int bmp_display(ulong addr, int x, int y)
{
struct udevice *dev;
int ret;
struct bmp_image *bmp = map_sysmem(addr, 0);
void *bmp_alloc_addr = NULL;
unsigned long len;
if (!((bmp->header.signature[0] == 'B') &&
(bmp->header.signature[1] == 'M')))
bmp = gunzip_bmp(addr, &len, &bmp_alloc_addr);
if (!bmp) {
printf("There is no valid bmp file at the given address\n");
return 1;
}
addr = map_to_sysmem(bmp);
ret = uclass_first_device_err(UCLASS_VIDEO, &dev);
if (!ret) {
bool align = false;
if (x == BMP_ALIGN_CENTER || y == BMP_ALIGN_CENTER)
align = true;
ret = video_bmp_display(dev, addr, x, y, align);
}
if (bmp_alloc_addr)
free(bmp_alloc_addr);
return ret ? CMD_RET_FAILURE : 0;
}
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