X-Git-Url: https://harrygodden.com/git/?p=csRadar.git;a=blobdiff_plain;f=csrTga.h;fp=csrTga.h;h=c3fbd5b27f929a1d728f39f1bac0e6bc70e2b017;hp=0000000000000000000000000000000000000000;hb=dee56773cecd3a165331732008b7c0acf6f13393;hpb=abfc6360542cb480122313a36f6ed02c08074ed5

diff --git a/csrTga.h b/csrTga.h
new file mode 100644
index 0000000..c3fbd5b
--- /dev/null
+++ b/csrTga.h
@@ -0,0 +1,62 @@
+#pragma pack(push, 1)
+struct tga_header 
+{
+	char  idlength;
+	char  colourmaptype;
+	char  datatypecode;
+	short int colourmaporigin;
+	short int colourmaplength;
+	char  colourmapdepth;
+	short int x_origin;
+	short int y_origin;
+	short width;
+	short height;
+	char  bitsperpixel;
+	char  imagedescriptor;
+};
+#pragma pack(pop)
+
+// Requires RGBA data. Can write grayscale (comp=1), RGB (comp=3) or RGBA (comp=4)
+int csr_tga_write( const char *path, u32 width, u32 height, int comp, u8 *rgba )
+{
+	FILE *fp = fopen( path, "wb" );
+
+	if( fp )
+	{
+		struct tga_header header =
+		{
+			.datatypecode = 2,
+			.width = width,
+			.height = height,
+			.bitsperpixel = comp * 8,
+			.imagedescriptor = 0x20
+		};
+
+		fwrite( &header, sizeof( struct tga_header ), 1, fp );
+
+		for( u32 i = 0; i < width * height; i ++ )
+		{
+			u8 *colour = rgba + i*4;			
+			u8 flipped[4];
+
+			if( comp >= 3 )
+			{				
+				flipped[0] = colour[2];
+				flipped[1] = colour[1];
+				flipped[2] = colour[0];
+				flipped[3] = colour[3];
+				
+				colour = flipped;
+			}
+			
+			fwrite( colour, 1, comp, fp );
+		}
+
+		fclose( fp );
+		return 1;
+	}
+	else
+	{
+		return 0;
+	}
+}