X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=libopenjpeg%2Fimage.c;h=0869b9af234419f48375b4b83e1bea24e311316e;hb=dcb3fcbfa7554ad1832d714b16946385e9520462;hp=30b7d139e74bd97b6fc8955afc8d4ceab68f0812;hpb=04966097fc1d92fbfb6650d43b115447d5370c2c;p=openjpeg.git

diff --git a/libopenjpeg/image.c b/libopenjpeg/image.c
index 30b7d139..0869b9af 100644
--- a/libopenjpeg/image.c
+++ b/libopenjpeg/image.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, Hervé Drolon, FreeImage Team
+ * Copyright (c) 2005, Herve Drolon, FreeImage Team
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,6 +31,11 @@ opj_image_t* opj_image_create0(void) {
 	return image;
 }
 
+opj_image_header_t* opj_image_header_create0(void) {
+	opj_image_header_t *image_header = (opj_image_header_t*)opj_calloc(1, sizeof(opj_image_header_t));
+	return image_header;
+}
+
 opj_image_t* OPJ_CALLCONV opj_image_create(int numcmpts, opj_image_cmptparm_t *cmptparms, OPJ_COLOR_SPACE clrspc) {
 	int compno;
 	opj_image_t *image = NULL;
@@ -70,6 +75,7 @@ opj_image_t* OPJ_CALLCONV opj_image_create(int numcmpts, opj_image_cmptparm_t *c
 	return image;
 }
 
+// TODO remove this one
 void OPJ_CALLCONV opj_image_destroy(opj_image_t *image) {
 	int i;
 	if(image) {
@@ -87,3 +93,51 @@ void OPJ_CALLCONV opj_image_destroy(opj_image_t *image) {
 	}
 }
 
+
+void OPJ_CALLCONV opj_image_header_destroy(opj_image_header_t *image_header) {
+	if(image_header) {
+		if(image_header->comps) {
+			/* image components */
+			opj_free(image_header->comps);
+		}
+		if(image_header->icc_profile_buf) {
+			opj_free(image_header->icc_profile_buf);
+		}
+		opj_free(image_header);
+	}
+}
+
+/**
+ * Updates the components characteristics of the image from the coding parameters.
+ *
+ * @param p_image_header	the image header to update.
+ * @param p_cp				the coding parameters from which to update the image.
+ */
+void opj_image_comp_header_update(opj_image_header_t * p_image_header, const opj_cp_v2_t * p_cp)
+{
+	OPJ_UINT32 i, l_width, l_height;
+	OPJ_INT32 l_x0, l_y0, l_x1, l_y1;
+	OPJ_INT32 l_comp_x0, l_comp_y0, l_comp_x1, l_comp_y1;
+	opj_image_comp_header_t* l_img_comp = NULL;
+
+	l_x0 = int_max(p_cp->tx0 , p_image_header->x0);
+	l_y0 = int_max(p_cp->ty0 , p_image_header->y0);
+	l_x1 = int_min(p_cp->tx0 + p_cp->tw * p_cp->tdx, p_image_header->x1);
+	l_y1 = int_min(p_cp->ty0 + p_cp->th * p_cp->tdy, p_image_header->y1);
+
+	l_img_comp = p_image_header->comps;
+	for	(i = 0; i < p_image_header->numcomps; ++i) {
+		l_comp_x0 = int_ceildiv(l_x0, l_img_comp->dx);
+		l_comp_y0 = int_ceildiv(l_y0, l_img_comp->dy);
+		l_comp_x1 = int_ceildiv(l_x1, l_img_comp->dx);
+		l_comp_y1 = int_ceildiv(l_y1, l_img_comp->dy);
+		l_width = int_ceildivpow2(l_comp_x1 - l_comp_x0, l_img_comp->factor);
+		l_height = int_ceildivpow2(l_comp_y1 - l_comp_y0, l_img_comp->factor);
+		l_img_comp->w = l_width;
+		l_img_comp->h = l_height;
+		l_img_comp->x0 = l_x0;
+		l_img_comp->y0 = l_y0;
+		++l_img_comp;
+	}
+}
+