This commit is a modified version of patch #6860

It adds read only dds support.  (Writing will come later)

Kent

1 files changed, 120 insertions, 0 deletions

diff --git a/source/blender/imbuf/intern/dds/dds_api.cpp b/source/blender/imbuf/intern/dds/dds_api.cpp
new file mode 100644
index 00000000000..0e06fd3e50b
--- /dev/null
+++ b/source/blender/imbuf/intern/dds/dds_api.cpp
@@ -0,0 +1,120 @@
+/**
+ * $Id$
+ *
+ * ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version. The Blender
+ * Foundation also sells licenses for use in proprietary software under
+ * the Blender License.  See http://www.blender.org/BL/ for information
+ * about this.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * Contributors: Amorilia (amorilia@gamebox.net)
+ *
+ * ***** END GPL/BL DUAL LICENSE BLOCK *****
+ */
+
+#include <dds_api.h>
+#include <Stream.h>
+#include <DirectDrawSurface.h>
+
+#include <stdio.h> // printf
+
+extern "C" {
+
+#include "imbuf.h"
+#include "imbuf_patch.h"
+#include "IMB_imbuf_types.h"
+#include "IMB_imbuf.h"
+#include "IMB_allocimbuf.h"
+
+/* not supported yet
+short imb_save_dds(struct ImBuf * ibuf, char *name, int flags)
+{
+	return(0);
+}
+*/
+
+int imb_is_a_dds(unsigned char *mem) // note: use at most first 32 bytes
+{
+	/* heuristic check to see if mem contains a DDS file */
+	/* header.fourcc == FOURCC_DDS */
+	if ((mem[0] != 'D') || (mem[1] != 'D') || (mem[2] != 'S') || (mem[3] != ' ')) return(0);
+	/* header.size == 124 */
+	if ((mem[4] != 124) || mem[5] || mem[6] || mem[7]) return(0);
+	return(1);
+}
+
+struct ImBuf *imb_load_dds(unsigned char *mem, int size, int flags)
+{
+	struct ImBuf * ibuf = 0;
+	DirectDrawSurface dds(mem, size); /* reads header */
+	unsigned char bytes_per_pixel;
+	unsigned int *rect;
+	Image img;
+	unsigned int numpixels = 0;
+	int col;
+	unsigned char *cp = (unsigned char *) &col;
+	Color32 pixel;
+	Color32 *pixels = 0;
+
+	/* check if DDS is valid and supported */
+	if (!dds.isValid()) {
+		printf("DDS: not valid; header follows\n");
+		dds.printInfo();
+		return(0);
+	}
+	if (!dds.isSupported()) {
+		printf("DDS: format not supported\n");
+		return(0);
+	}
+	if ((dds.width() > 65535) || (dds.height() > 65535)) {
+		printf("DDS: dimensions too large\n");
+		return(0);
+	}
+
+	/* convert DDS into ImBuf */
+	if (dds.hasAlpha()) bytes_per_pixel = 32;
+	else bytes_per_pixel = 24;
+	ibuf = IMB_allocImBuf(dds.width(), dds.height(), bytes_per_pixel, 0, 0); 
+	if (ibuf == 0) return(0); /* memory allocation failed */
+
+	ibuf->ftype = DDS;
+
+	if ((flags & IB_test) == 0) {
+		if (!imb_addrectImBuf(ibuf)) return(ibuf);
+		if (ibuf->rect == 0) return(ibuf);
+
+		rect = ibuf->rect;
+		dds.mipmap(&img, 0, 0); /* load first face, first mipmap */
+		pixels = img.pixels();
+		numpixels = dds.width() * dds.height();
+		cp[3] = 0xff; /* default alpha if alpha channel is not present */
+
+		for (unsigned int i = 0; i < numpixels; i++) {
+			pixel = pixels[i];
+			cp[0] = pixel.r; /* set R component of col */
+			cp[1] = pixel.g; /* set G component of col */
+			cp[2] = pixel.b; /* set B component of col */
+			if (bytes_per_pixel == 32)
+				cp[3] = pixel.a; /* set A component of col */
+			rect[i] = col;
+		}
+		IMB_flipy(ibuf);
+	}
+
+	return(ibuf);
+}
+
+} // extern "C"