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check if _Current == NULL for TXB

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This commit is contained in:
Brian
2007-01-08 16:49:43 -07:00
parent 8cad795a80
commit 41a4e828d9
1 changed files with 5 additions and 3 deletions
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8
src/mesa/swrast/s_fragprog.c
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@@ -1358,6 +1358,8 @@ execute_program( GLcontext *ctx,
case OPCODE_TXB: /* GL_ARB_fragment_program only */
/* Texel lookup with LOD bias */
{
const struct gl_texture_unit *texUnit
= &ctx->Texture.Unit[inst->TexSrcUnit];
GLfloat coord[4], color[4], lambda, bias;
if (inst->SrcReg[0].File == PROGRAM_INPUT &&
inst->SrcReg[0].Index == FRAG_ATTRIB_TEX0+inst->TexSrcUnit)
@@ -1366,9 +1368,9 @@ execute_program( GLcontext *ctx,
lambda = 0.0;
fetch_vector4(ctx, &inst->SrcReg[0], machine, program, coord);
/* coord[3] is the bias to add to lambda */
bias = ctx->Texture.Unit[inst->TexSrcUnit].LodBias
+ ctx->Texture.Unit[inst->TexSrcUnit]._Current->LodBias
+ coord[3];
bias = texUnit->LodBias + coord[3];
if (texUnit->_Current)
bias += texUnit->_Current->LodBias;
fetch_texel(ctx, coord, lambda + bias, inst->TexSrcUnit, color);
store_vector4( inst, machine, color );
}