From: Rudolf Polzer <divverent@alientrap.org>
Date: Wed, 23 Feb 2011 09:50:31 +0000 (+0100)
Subject: support for writing greyscale TGA files (for minimap)
X-Git-Url: https://git.rm.cloudns.org/?a=commitdiff_plain;h=7132b13c293f4f8670c319d1f993a0fa7647aef8;p=xonotic%2Fnetradiant.git

support for writing greyscale TGA files (for minimap)
---

diff --git a/tools/quake3/common/imagelib.c b/tools/quake3/common/imagelib.c
index fa588321..5bc248b0 100644
--- a/tools/quake3/common/imagelib.c
+++ b/tools/quake3/common/imagelib.c
@@ -1182,6 +1182,24 @@ void WriteTGA (const char *filename, byte *data, int width, int height) {
 	free (buffer);
 }
 
+void WriteTGAGray (const char *filename, byte *data, int width, int height) {
+	byte	buffer[18];
+	FILE	*f;
+
+	memset (buffer, 0, 18);
+	buffer[2] = 3;		// uncompressed type
+	buffer[12] = width&255;
+	buffer[13] = width>>8;
+	buffer[14] = height&255;
+	buffer[15] = height>>8;
+	buffer[16] = 8;	// pixel size
+
+	f = fopen (filename, "wb");
+	fwrite (buffer, 1, 18, f);
+	fwrite (data, 1, width * height, f);
+	fclose (f);
+}
+
 /*
 ============================================================================
 
diff --git a/tools/quake3/common/imagelib.h b/tools/quake3/common/imagelib.h
index 1379427d..8ac02e1e 100644
--- a/tools/quake3/common/imagelib.h
+++ b/tools/quake3/common/imagelib.h
@@ -39,6 +39,7 @@ void Save256Image (const char *name, byte *pixels, byte *palette,
 void LoadTGA (const char *filename, byte **pixels, int *width, int *height);
 void LoadTGABuffer ( const byte *buffer, const byte* enddata, byte **pic, int *width, int *height);
 void WriteTGA (const char *filename, byte *data, int width, int height);
+void WriteTGAGray (const char *filename, byte *data, int width, int height);
 int LoadJPGBuff( void *src_buffer, int src_size, unsigned char **pic, int *width, int *height );
 
 void Load32BitImage (const char *name, unsigned **pixels, int *width, int *height);