From: Corbin Simpson <MostAwesomeDude@gmail.com>
Date: Sun, 29 Jun 2008 17:30:47 +0000 (-0700)
Subject: r300: Change LOD bias emission to more closely follow per-tex rules.
X-Git-Tag: 062012170305~18436
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a74d22ba715da5e52efb15aebd15a74851f87d43;p=profile%2Fivi%2Fmesa.git

r300: Change LOD bias emission to more closely follow per-tex rules.
Okay, this time it's for real, and for good. This should be a perma-fix.
---

diff --git a/src/mesa/drivers/dri/r300/r300_state.c b/src/mesa/drivers/dri/r300/r300_state.c
index 1d4472d..0035101 100644
--- a/src/mesa/drivers/dri/r300/r300_state.c
+++ b/src/mesa/drivers/dri/r300/r300_state.c
@@ -1456,8 +1456,10 @@ 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
-				| r300CalculateTexLodBias(r300->LODBias);
+			/* Make LOD bias a bit more per-tex and less per-everything. */
+			t->filter_1 &= ~R300_LOD_BIAS_MASK;
+			t->filter_1 |= r300CalculateTexLodBias(ctx->Texture.Unit[i].LodBias);
+			r300->hw.tex.filter_1.cmd[R300_TEX_VALUE_0 + hw_tmu] = t->filter_1;
 			r300->hw.tex.size.cmd[R300_TEX_VALUE_0 + hw_tmu] =
 			    t->size;
 			r300->hw.tex.format.cmd[R300_TEX_VALUE_0 +
diff --git a/src/mesa/drivers/dri/r300/r300_tex.c b/src/mesa/drivers/dri/r300/r300_tex.c
index 5059513..4ed7177 100644
--- a/src/mesa/drivers/dri/r300/r300_tex.c
+++ b/src/mesa/drivers/dri/r300/r300_tex.c
@@ -955,7 +955,6 @@ static void r300TexEnv(GLcontext * ctx, GLenum target,
 	 */
 	switch (pname) {
 	case GL_TEXTURE_LOD_BIAS_EXT: {
-		/* Needs to be relocated in order to make sure we got the right tmu */
 		GLfloat bias, min;
 
 		/* The R300's LOD bias is a signed 2's complement value with a
@@ -968,7 +967,14 @@ static void r300TexEnv(GLcontext * ctx, GLenum target,
 			"no_neg_lod_bias") ? 0.0 : -16.0;
 		bias = CLAMP(bias, min, 16.0);
 
-		rmesa->LODBias = bias;
+		/* There's probably a magic Mesa method for finding the REAL
+		 * texture unit. I don't know it, though. */
+		if (!(ctx->Texture._EnabledUnits & (1 << ctx->Texture.CurrentUnit))) {
+			break;
+		}
+
+		/* Save our newly clamped LOD bias. */
+		ctx->Texture.Unit[ctx->Texture.CurrentUnit].LodBias = bias;
 
 		break;
 	}