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clamp lambda to Min/MaxLod

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Brian
2007-11-19 13:05:00 -07:00
parent 3821d15e06
commit 827e72de75
1 changed files with 6 additions and 3 deletions
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9
src/mesa/swrast/s_fragprog.c
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@@ -1,8 +1,8 @@
/*
* Mesa 3-D graphics library
* Version: 6.5.2
* Version: 7.0.3
*
* Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
* Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
@@ -41,9 +41,12 @@ fetch_texel( GLcontext *ctx, const GLfloat texcoord[4], GLfloat lambda,
{
GLchan rgba[4];
SWcontext *swrast = SWRAST_CONTEXT(ctx);
const struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current;
lambda = CLAMP(lambda, texObj->MinLod, texObj->MaxLod);
/* XXX use a float-valued TextureSample routine here!!! */
swrast->TextureSample[unit](ctx, ctx->Texture.Unit[unit]._Current,
swrast->TextureSample[unit](ctx, texObj,
1, (const GLfloat (*)[4]) texcoord,
&lambda, &rgba);
color[0] = CHAN_TO_FLOAT(rgba[0]);