Some images can be quite large, so add an option to compress the image data with gzip in the U-Boot image. Then at runtime, the board can decompress it with the normal zlib functions.
Signed-off-by: Mike Frysinger vapier@gentoo.org --- v4 - redo error handling
v3 - fix copyright - free buffers on error
v2 - add error checking
tools/easylogo/easylogo.c | 98 ++++++++++++++++++++++++++++++++++++++++++--- 1 files changed, 92 insertions(+), 6 deletions(-)
diff --git a/tools/easylogo/easylogo.c b/tools/easylogo/easylogo.c index 00a1e4e..41e5838 100644 --- a/tools/easylogo/easylogo.c +++ b/tools/easylogo/easylogo.c @@ -3,15 +3,19 @@ ** ============================== ** (C) 2000 by Paolo Scaffardi (arsenio@tin.it) ** AIRVENT SAM s.p.a - RIMINI(ITALY) +** (C) 2007-2008 Mike Frysinger vapier@gentoo.org ** ** This is still under construction! */
+#include <errno.h> #include <getopt.h> #include <stdbool.h> #include <stdio.h> #include <stdlib.h> #include <string.h> +#include <unistd.h> +#include <sys/stat.h>
#pragma pack(1)
@@ -49,6 +53,17 @@ typedef struct { int width, height, pixels, bpp, pixel_size, size, palette_size, yuyv; } image_t;
+void *xmalloc (size_t size) +{ + void *ret = malloc (size); + if (!ret) { + fprintf (stderr, "\nerror: malloc(%zu) failed: %s", + size, strerror(errno)); + exit (1); + } + return ret; +} + void StringUpperCase (char *str) { int count = strlen (str); @@ -171,7 +186,7 @@ int image_load_tga (image_t * image, char *filename) image->pixel_size = ((image->bpp - 1) / 8) + 1; image->pixels = image->width * image->height; image->size = image->pixels * image->pixel_size; - image->data = malloc (image->size); + image->data = xmalloc (image->size);
if (image->bpp != 24) { printf ("Bpp not supported: %d!\n", image->bpp); @@ -192,7 +207,7 @@ int image_load_tga (image_t * image, char *filename) /* Swapping image */
if (!(header.ImageDescriptorByte & 0x20)) { - unsigned char *temp = malloc (image->size); + unsigned char *temp = xmalloc (image->size); int linesize = image->pixel_size * image->width; void *dest = image->data, *source = temp + image->size - linesize; @@ -239,7 +254,7 @@ int image_rgb_to_yuyv (image_t * rgb_image, image_t * yuyv_image) yuyv_image->pixels = yuyv_image->width * yuyv_image->height; yuyv_image->size = yuyv_image->pixels * yuyv_image->pixel_size; dest = (unsigned short *) (yuyv_image->data = - malloc (yuyv_image->size)); + xmalloc (yuyv_image->size)); yuyv_image->palette = 0; yuyv_image->palette_size = 0;
@@ -261,6 +276,8 @@ int image_rgb_to_yuyv (image_t * rgb_image, image_t * yuyv_image) return 0; }
+int use_gzip = 0; + int image_save_header (image_t * image, char *filename, char *varname) { FILE *file = fopen (filename, "w"); @@ -283,6 +300,65 @@ int image_save_header (image_t * image, char *filename, char *varname) fprintf (file, " *\t\t'x'\t\tis the horizontal position\n"); fprintf (file, " *\t\t'y'\t\tis the vertical position\n */\n\n");
+ /* gzip compress */ + if (use_gzip & 0x1) { + const char *errstr = NULL; + unsigned char *compressed; + struct stat st; + FILE *gz; + char *gzfilename = xmalloc(strlen (filename) + 20); + char *gzcmd = xmalloc(strlen (filename) + 20); + + sprintf (gzfilename, "%s.gz", filename); + sprintf (gzcmd, "gzip > %s", gzfilename); + gz = popen (gzcmd, "w"); + if (!gz) { + errstr = "\nerror: popen() failed"; + goto done; + } + if (fwrite (image->data, image->size, 1, gz) != 1) { + errstr = "\nerror: writing data to gzip failed"; + goto done; + } + if (pclose (gz)) { + errstr = "\nerror: gzip process failed"; + goto done; + } + + gz = fopen (gzfilename, "r"); + if (!gz) { + errstr = "\nerror: open() on gzip data failed"; + goto done; + } + if (stat (gzfilename, &st)) { + errstr = "\nerror: stat() on gzip file failed"; + goto done; + } + compressed = xmalloc (st.st_size); + if (fread (compressed, st.st_size, 1, gz) != 1) { + errstr = "\nerror: reading gzip data failed"; + goto done; + } + fclose (gz); + + unlink (gzfilename); + + dataptr = compressed; + count = st.st_size; + fprintf (file, "#define EASYLOGO_ENABLE_GZIP %i\n\n", count); + if (use_gzip & 0x2) + fprintf (file, "static unsigned char EASYLOGO_DECOMP_BUFFER[%i];\n\n", image->size); + + done: + free (gzfilename); + free (gzcmd); + + if (errstr) { + perror (errstr); + return -1; + } + } + /* Headers */ fprintf (file, "#include <video_easylogo.h>\n\n"); /* Macros */ @@ -300,8 +376,8 @@ int image_save_header (image_t * image, char *filename, char *varname) fprintf (file, "#define DEF_%s_SIZE\t\t%d\n\n", def_name, image->size); /* Declaration */ - fprintf (file, "unsigned char DEF_%s_DATA[DEF_%s_SIZE] = {\n", - def_name, def_name); + fprintf (file, "unsigned char DEF_%s_DATA[] = {\n", + def_name);
/* Data */ while (count) @@ -359,6 +435,8 @@ static void usage (int exit_status) "\n" "Options:\n" " -r Output RGB instead of YUYV\n" + " -g Compress with gzip\n" + " -b Preallocate space in bss for decompressing image\n" " -h Help output\n" "\n" "Where: 'inputfile' is the TGA image to load\n" @@ -377,7 +455,7 @@ int main (int argc, char *argv[])
image_t rgb_logo, yuyv_logo;
- while ((c = getopt(argc, argv, "hr")) > 0) { + while ((c = getopt(argc, argv, "hrgb")) > 0) { switch (c) { case 'h': usage (0); @@ -386,6 +464,14 @@ int main (int argc, char *argv[]) use_rgb = true; puts ("Using 24-bit RGB Output Fromat"); break; + case 'g': + use_gzip |= 0x1; + puts ("Compressing with gzip"); + break; + case 'b': + use_gzip |= 0x2; + puts ("Preallocating bss space for decompressing image"); + break; default: usage (1); break;