diff options
Diffstat (limited to 'src/mesa/drivers')
| -rw-r--r-- | src/mesa/drivers/dri/savage/savagetex.c | 87 |
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; |