DXGL r403 - Code Review

Repository:	DXGL
Revision:	< r402‎ \| r403 \| r404 >
Date:	19:27, 2 September 2013
Author:	admin
Status:	new
Tags:
Comment:	Properly bias 8-bit texture lookups to center of texel. Tested compatible with GeForce 6200 card on XP.
Modified paths:	/ddraw/shaders.cpp (modified) (history)

Index: ddraw/shaders.cpp
—	—	@@ -48,7 +48,7 @@
49	49	void main() \n\
50	50	{ \n\
51	51	vec4 myindex = texture2D(tex0, gl_TexCoord[0].xy); \n\
52		~~- vec2 index = vec2((myindex.x*((255.0/256.0)+(0.5/256.0))),0.5);\n\~~
	52	+ vec2 index = vec2(((myindex.x*(255.0/256.0))+(0.5/256.0)),0.5);\n\
53	53	vec4 texel = texture2D(pal, index); \n\
54	54	gl_FragColor = texel; \n\
55	55	} ";

Diff [purge]