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-rw-r--r--src/mesa/drivers/dri/savage/savagetex.c87
1 files changed, 24 insertions, 63 deletions
diff --git a/src/mesa/drivers/dri/savage/savagetex.c b/src/mesa/drivers/dri/savage/savagetex.c
index 15a33dac7ad..b7473469dc9 100644
--- a/src/mesa/drivers/dri/savage/savagetex.c
+++ b/src/mesa/drivers/dri/savage/savagetex.c
@@ -1050,38 +1050,15 @@ static void savageUpdateTex0State_s4( GLcontext *ctx )
break;
}
- if((ctx->Texture.Unit[0].LodBias !=0.0F) &&
+ if((ctx->Texture.Unit[0].LodBias !=0.0F) ||
(imesa->regs.s4.texCtrl[0].ni.dBias != 0))
{
- union {
- GLfloat f;
- GLint i;
- } bias;
- GLuint ul;
-
- bias.f = ctx->Texture.Unit[0].LodBias;
-
- /* if the value is >= 15.9375 determine whether >= 16
- or <0
- */
- if(((bias.i) & 0x7FFFFFFF) >= 0x417F0000)
- {
- if((bias.i) & 0x80000000)
- {
- ul=0x101;
- }
- else
- {
- ul=0xff;
- }
- }
- else
- {
- ul=(GLuint)(bias.f*16.0);
- }
-
- ul &= 0x1FF;
- imesa->regs.s4.texCtrl[0].ni.dBias = ul;
+ int bias = (int)(ctx->Texture.Unit[0].LodBias * 32.0);
+ if (bias < -256)
+ bias = -256;
+ else if (bias > 255)
+ bias = 255;
+ imesa->regs.s4.texCtrl[0].ni.dBias = bias & 0x1ff;
}
imesa->regs.s4.texDescr.ni.tex0En = GL_TRUE;
@@ -1275,38 +1252,15 @@ static void savageUpdateTex1State_s4( GLcontext *ctx )
break;
}
- if((ctx->Texture.Unit[1].LodBias !=0.0F)&&
+ if((ctx->Texture.Unit[1].LodBias !=0.0F) ||
(imesa->regs.s4.texCtrl[1].ni.dBias != 0))
{
- union {
- GLfloat f;
- GLint i;
- } bias;
- GLuint ul;
-
- bias.f = ctx->Texture.Unit[1].LodBias;
-
- /* if the value is >= 15.9375 determine whether >= 16
- or <0
- */
- if(((bias.i) & 0x7FFFFFFF) >= 0x417F0000)
- {
- if((bias.i) & 0x80000000)
- {
- ul=0x101;
- }
- else
- {
- ul=0xff;
- }
- }
- else
- {
- ul=(GLuint)(bias.f*16.0);
- }
-
- ul &= 0x1FF;
- imesa->regs.s4.texCtrl[1].ni.dBias = ul;
+ int bias = (int)(ctx->Texture.Unit[1].LodBias * 32.0);
+ if (bias < -256)
+ bias = -256;
+ else if (bias > 255)
+ bias = 255;
+ imesa->regs.s4.texCtrl[1].ni.dBias = bias & 0x1ff;
}
imesa->regs.s4.texDescr.ni.tex1En = GL_TRUE;
@@ -1439,9 +1393,16 @@ static void savageUpdateTexState_s3d( GLcontext *ctx )
}
*/
- /* LOD bias makes corruption of small mipmap levels worse on Savage IX
- * but doesn't show the desired effect with the lodbias mesa demo. */
- imesa->regs.s3d.texCtrl.ni.dBias = 0;
+ if((ctx->Texture.Unit[0].LodBias !=0.0F) ||
+ (imesa->regs.s3d.texCtrl.ni.dBias != 0))
+ {
+ int bias = (int)(ctx->Texture.Unit[0].LodBias * 16.0);
+ if (bias < -256)
+ bias = -256;
+ else if (bias > 255)
+ bias = 255;
+ imesa->regs.s3d.texCtrl.ni.dBias = bias & 0x1ff;
+ }
imesa->regs.s3d.texCtrl.ni.texEn = GL_TRUE;
imesa->regs.s3d.texDescr.ni.texWidth = t->image[0].image->WidthLog2;