OpenGL2: Add r_exportCubemaps for saving cubemaps on map load.

1 files changed, 45 insertions, 0 deletions

diff --git a/src/renderergl2/tr_image_dds.c b/src/renderergl2/tr_image_dds.c
index 8ad406fd..b509014d 100644
--- a/src/renderergl2/tr_image_dds.c
+++ b/src/renderergl2/tr_image_dds.c
@@ -451,3 +451,48 @@ void R_LoadDDS ( const char *filename, byte **pic, int *width, int *height, GLen
 
 	ri.FS_FreeFile(buffer.v);
 }
+
+void R_SaveDDS(const char *filename, byte *pic, int width, int height, int depth)
+{
+	byte *data;
+	ddsHeader_t *ddsHeader;
+	int picSize, size;
+
+	if (!depth)
+		depth = 1;
+
+	picSize = width * height * depth * 4;
+	size = 4 + sizeof(*ddsHeader) + picSize;
+	data = ri.Malloc(size);
+
+	data[0] = 'D';
+	data[1] = 'D';
+	data[2] = 'S';
+	data[3] = ' ';
+
+	ddsHeader = (ddsHeader_t *)(data + 4);
+	memset(ddsHeader, 0, sizeof(ddsHeader_t));
+
+	ddsHeader->headerSize = 0x7c;
+	ddsHeader->flags = _DDSFLAGS_REQUIRED;
+	ddsHeader->height = height;
+	ddsHeader->width = width;
+	ddsHeader->always_0x00000020 = 0x00000020;
+	ddsHeader->caps = DDSCAPS_COMPLEX | DDSCAPS_REQUIRED;
+
+	if (depth == 6)
+		ddsHeader->caps2 = DDSCAPS2_CUBEMAP;
+
+	ddsHeader->pixelFormatFlags = DDSPF_RGB | DDSPF_ALPHAPIXELS;
+	ddsHeader->rgbBitCount = 32;
+	ddsHeader->rBitMask = 0x000000ff;
+	ddsHeader->gBitMask = 0x0000ff00;
+	ddsHeader->bBitMask = 0x00ff0000;
+	ddsHeader->aBitMask = 0xff000000;
+
+	Com_Memcpy(data + 4 + sizeof(*ddsHeader), pic, picSize);
+
+	ri.FS_WriteFile(filename, data, size);
+
+	ri.Free(data);
+}