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r300: Make LOD bias a persistent environment variable.

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Per airlied's suggestion.
This commit is contained in:
Corbin Simpson
2008-06-16 11:37:32 -07:00
parent e9d1889891
commit 27b7f896d4
2 changed files with 14 additions and 14 deletions
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15
src/mesa/drivers/dri/r300/r300_state.c
View File

@@ -1381,6 +1381,18 @@ static void r500SetupFragmentShaderTextures(GLcontext *ctx, int *tmu_mappings)
}
}
static GLuint r300CalculateTexLodBias(GLfloat bias)
{
GLuint b;
b = (unsigned int)fabsf(ceilf(bias*31));
if (signbit(bias)) {
b ^= 0x3ff; /* 10 bits */
}
b <<= 3;
b &= R300_LOD_BIAS_MASK;
return b;
}
static void r300SetupTextures(GLcontext * ctx)
{
int i, mtu;
@@ -1444,7 +1456,8 @@ static void r300SetupTextures(GLcontext * ctx)
r300->hw.tex.filter.cmd[R300_TEX_VALUE_0 +
hw_tmu] =
gen_fixed_filter(t->filter) | (hw_tmu << 28);
r300->hw.tex.filter_1.cmd[R300_TEX_VALUE_0 + hw_tmu] = t->filter_1;
r300->hw.tex.filter_1.cmd[R300_TEX_VALUE_0 + hw_tmu] = t->filter_1
| r300CalculateTexLodBias(r300->LODBias);
r300->hw.tex.size.cmd[R300_TEX_VALUE_0 + hw_tmu] =
t->size;
r300->hw.tex.format.cmd[R300_TEX_VALUE_0 +

13
src/mesa/drivers/dri/r300/r300_tex.c
View File

@@ -284,7 +284,6 @@ static r300TexObjPtr r300AllocTexObj(struct gl_texture_object *texObj)
r300SetTexWrap(t, texObj->WrapS, texObj->WrapT, texObj->WrapR);
r300SetTexFilter(t, texObj->MinFilter, texObj->MagFilter, texObj->MaxAnisotropy);
r300SetTexBorderColor(t, texObj->_BorderChan);
r300SetTexLodBias(t, texObj->LodBias);
}
return t;
@@ -1036,18 +1035,6 @@ static void r300TexEnv(GLcontext * ctx, GLenum target,
"no_neg_lod_bias") ? 0.0 : -16.0;
bias = CLAMP(bias, min, 16.0);
/* This next part feels quite hackish;
* is there a cleaner way? */
GLenum target = r300TexUnitTarget(&ctx->Texture.Unit[ctx->Texture.CurrentUnit]);
if (target) {
struct gl_texture_object *texObj =
_mesa_select_tex_object(ctx, &ctx->Texture.Unit[ctx->Texture.CurrentUnit], target);
r300TexObjPtr t = (r300TexObjPtr) texObj->DriverData;
texObj->LodBias = bias;
r300SetTexLodBias(t, texObj->LodBias);
}
rmesa->LODBias = bias;
break;