Add ICC-color-profile handling to jpg2ff - farbfeld - suckless image format with conversion tools
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---
(DIR) commit 93204899d4a27d2ecefe7fe7f0902f94cab72268
(DIR) parent 42ace91b3ddba2fa40e0362ce7aba814aa7dd79c
(HTM) Author: FRIGN <dev@frign.de>
Date: Sun, 17 Jan 2016 21:03:19 +0100
Add ICC-color-profile handling to jpg2ff
And fix a bug in the transforms that was introduced yesterday.
The only thing remaining for jpg is handling EXIF-embedded color
profiles, but the EXIF format sucks so bad.
Diffstat:
M jpg2ff.c | 29 +++++++++++++++++++++++++----
1 file changed, 25 insertions(+), 4 deletions(-)
---
(DIR) diff --git a/jpg2ff.c b/jpg2ff.c
@@ -20,7 +20,6 @@ static cmsCIExyYTRIPLE primaries = {
{ 0.0366, 0.0001, 0.000086 }, /* blue */
};
-
METHODDEF(void)
jpeg_error(j_common_ptr cinfo)
{
@@ -32,10 +31,11 @@ jpeg_error(j_common_ptr cinfo)
int
main(int argc, char *argv[])
{
- cmsHPROFILE in_profile, out_profile;
+ cmsHPROFILE in_profile = NULL, out_profile;
cmsHTRANSFORM transform;
cmsToneCurve *gamma18, *out_curves[3];
struct jpeg_decompress_struct cinfo;
+ jpeg_saved_marker_ptr marker;
struct jpeg_error_mgr jerr;
uint32_t width, height, val_be;
uint16_t *ff_row;
@@ -54,6 +54,10 @@ main(int argc, char *argv[])
jerr.error_exit = jpeg_error;
jpeg_create_decompress(&cinfo);
+
+ jpeg_save_markers(&cinfo, JPEG_APP0 + 1, 0xffff); /* exif data */
+ jpeg_save_markers(&cinfo, JPEG_APP0 + 2, 0xffff); /* icc data */
+
jpeg_stdio_src(&cinfo, stdin);
jpeg_read_header(&cinfo, TRUE);
@@ -64,6 +68,23 @@ main(int argc, char *argv[])
cinfo.output_components = 3; /* color components per pixel */
cinfo.out_color_space = JCS_RGB; /* input color space */
+ /* extract metadata */
+ marker = cinfo.marker_list;
+ for(; marker; marker = marker->next) {
+ if (!marker->data || !marker->data_length)
+ continue;
+ if (marker->marker == JPEG_APP0 + 1) {
+ /* exif data marker */
+ /* todo: Should we handle icc data from exif? */
+ } else if (marker->marker == JPEG_APP0 + 2) {
+ /* icc data marker */
+ if (!(in_profile = cmsOpenProfileFromMem(
+ marker->data + 14,
+ marker->data_length - 14)))
+ goto lcmserr;
+ }
+ }
+
jpeg_start_decompress(&cinfo);
jpeg_row_len = width * cinfo.output_components;
@@ -77,7 +98,7 @@ main(int argc, char *argv[])
}
/* icc profile (output ProPhoto RGB) */
- if (!(in_profile = cmsCreate_sRGBProfile()))
+ if (!in_profile && !(in_profile = cmsCreate_sRGBProfile()))
goto lcmserr;
if (!(gamma18 = cmsBuildGamma(NULL, 1.8)))
goto lcmserr;
@@ -112,7 +133,7 @@ main(int argc, char *argv[])
ff_row[dx+3] = 65535;
}
- cmsDoTransform(transform, ff_row, ff_row, ff_row_len);
+ cmsDoTransform(transform, ff_row, ff_row, ff_row_len / 4);
for (i = 0; i < ff_row_len; i++) {
/* re-add alpha */