From 34683150878e0af0859c94d0c1f0c4bf8395b042 Mon Sep 17 00:00:00 2001 From: Robert Ellison Date: Wed, 4 Mar 2009 16:48:51 -0700 Subject: i965: add software fallback for conformant 3D textures and GL_CLAMP The i965 hardware cannot do GL_CLAMP behavior on textures; an earlier commit forced a software fallback if strict conformance was required (i.e. the INTEL_STRICT_CONFORMANCE environment variable was set) and 2D textures were used, but it was somewhat flawed - it could trigger the software fallback even if 2D textures weren't enabled, as long as one texture unit was enabled. This fixes that, and adds software fallback for GL_CLAMP behavior with 1D and 3D textures. It also adds support for a particular setting of the INTEL_STRICT_CONFORMANCE environment variable, which forces software fallbacks to be taken *all* the time. This is helpful with debugging. The value is: export INTEL_STRICT_CONFORMANCE=2 --- .../drivers/i915simple/i915_state_sampler.c | 2 +- src/mesa/drivers/dri/i915/intel_tris.c | 4 +-- src/mesa/drivers/dri/i965/brw_draw.c | 29 ++++++++++++++++++---- src/mesa/drivers/dri/intel/intel_context.c | 10 ++++++-- src/mesa/drivers/dri/intel/intel_context.h | 7 +++++- 5 files changed, 41 insertions(+), 11 deletions(-) diff --git a/src/gallium/drivers/i915simple/i915_state_sampler.c b/src/gallium/drivers/i915simple/i915_state_sampler.c index c09c10601b..3667ed1afa 100644 --- a/src/gallium/drivers/i915simple/i915_state_sampler.c +++ b/src/gallium/drivers/i915simple/i915_state_sampler.c @@ -116,7 +116,7 @@ static void update_sampler(struct i915_context *i915, ws == PIPE_TEX_WRAP_CLAMP_TO_BORDER || wt == PIPE_TEX_WRAP_CLAMP_TO_BORDER || wr == PIPE_TEX_WRAP_CLAMP_TO_BORDER)) { - if (i915->strict_conformance) { + if (i915->conformance_mode > 0) { assert(0); /* sampler->fallback = true; */ /* TODO */ diff --git a/src/mesa/drivers/dri/i915/intel_tris.c b/src/mesa/drivers/dri/i915/intel_tris.c index e80996580c..a857803b2e 100644 --- a/src/mesa/drivers/dri/i915/intel_tris.c +++ b/src/mesa/drivers/dri/i915/intel_tris.c @@ -989,7 +989,7 @@ intelChooseRenderState(GLcontext * ctx) intel->draw_tri = intel_fallback_tri; if (flags & DD_TRI_SMOOTH) { - if (intel->strict_conformance) + if (intel->conformance_mode > 0) intel->draw_tri = intel_fallback_tri; } @@ -1001,7 +1001,7 @@ intelChooseRenderState(GLcontext * ctx) } if (flags & DD_POINT_SMOOTH) { - if (intel->strict_conformance) + if (intel->conformance_mode > 0) intel->draw_point = intel_fallback_point; } diff --git a/src/mesa/drivers/dri/i965/brw_draw.c b/src/mesa/drivers/dri/i965/brw_draw.c index 7ab1ece263..0b64999437 100644 --- a/src/mesa/drivers/dri/i965/brw_draw.c +++ b/src/mesa/drivers/dri/i965/brw_draw.c @@ -195,11 +195,15 @@ static GLboolean check_fallbacks( struct brw_context *brw, GLuint i; /* If we don't require strict OpenGL conformance, never - * use fallbacks. + * use fallbacks. If we're forcing fallbacks, always + * use fallfacks. */ - if (!brw->intel.strict_conformance) + if (brw->intel.conformance_mode == 0) return GL_FALSE; + if (brw->intel.conformance_mode == 2) + return GL_TRUE; + if (ctx->Polygon.SmoothFlag) { for (i = 0; i < nr_prims; i++) if (reduced_prim[prim[i].mode] == GL_TRIANGLES) @@ -248,10 +252,25 @@ static GLboolean check_fallbacks( struct brw_context *brw, { int u; for (u = 0; u < ctx->Const.MaxTextureCoordUnits; u++) { - if (ctx->Texture.Unit[u].Enabled) { - if (ctx->Texture.Unit[u].CurrentTex[TEXTURE_2D_INDEX]->WrapS == GL_CLAMP || - ctx->Texture.Unit[u].CurrentTex[TEXTURE_2D_INDEX]->WrapT == GL_CLAMP) { + struct gl_texture_unit *texUnit = &ctx->Texture.Unit[u]; + if (texUnit->Enabled) { + if (texUnit->Enabled & TEXTURE_1D_BIT) { + if (texUnit->CurrentTex[TEXTURE_1D_INDEX]->WrapS == GL_CLAMP) { + return GL_TRUE; + } + } + if (texUnit->Enabled & TEXTURE_2D_BIT) { + if (texUnit->CurrentTex[TEXTURE_2D_INDEX]->WrapS == GL_CLAMP || + texUnit->CurrentTex[TEXTURE_2D_INDEX]->WrapT == GL_CLAMP) { + return GL_TRUE; + } + } + if (texUnit->Enabled & TEXTURE_3D_BIT) { + if (texUnit->CurrentTex[TEXTURE_3D_INDEX]->WrapS == GL_CLAMP || + texUnit->CurrentTex[TEXTURE_3D_INDEX]->WrapT == GL_CLAMP || + texUnit->CurrentTex[TEXTURE_3D_INDEX]->WrapR == GL_CLAMP) { return GL_TRUE; + } } } } diff --git a/src/mesa/drivers/dri/intel/intel_context.c b/src/mesa/drivers/dri/intel/intel_context.c index b3f6fc02df..65853234f1 100644 --- a/src/mesa/drivers/dri/intel/intel_context.c +++ b/src/mesa/drivers/dri/intel/intel_context.c @@ -506,10 +506,16 @@ intelInitContext(struct intel_context *intel, * start. */ if (getenv("INTEL_STRICT_CONFORMANCE")) { - intel->strict_conformance = 1; + unsigned int value = atoi(getenv("INTEL_STRICT_CONFORMANCE")); + if (value > 0) { + intel->conformance_mode = value; + } + else { + intel->conformance_mode = 1; + } } - if (intel->strict_conformance) { + if (intel->conformance_mode > 0) { ctx->Const.MinLineWidth = 1.0; ctx->Const.MinLineWidthAA = 1.0; ctx->Const.MaxLineWidth = 1.0; diff --git a/src/mesa/drivers/dri/intel/intel_context.h b/src/mesa/drivers/dri/intel/intel_context.h index 18dc43c4a4..f2ecb9eb27 100644 --- a/src/mesa/drivers/dri/intel/intel_context.h +++ b/src/mesa/drivers/dri/intel/intel_context.h @@ -229,7 +229,12 @@ struct intel_context GLboolean hw_stipple; GLboolean depth_buffer_is_float; GLboolean no_rast; - GLboolean strict_conformance; + + /* 0 - nonconformant, best performance; + * 1 - fallback to sw for known conformance bugs + * 2 - always fallback to sw + */ + GLuint conformance_mode; /* State for intelvb.c and inteltris.c. */ -- cgit v1.2.3