i965g: re-starting from the dri driver

1 files changed, 369 insertions, 0 deletions

diff --git a/src/gallium/drivers/i965/brw_wm_sampler_state.c b/src/gallium/drivers/i965/brw_wm_sampler_state.c
new file mode 100644
index 0000000000..dff466587a
--- /dev/null
+++ b/src/gallium/drivers/i965/brw_wm_sampler_state.c
@@ -0,0 +1,369 @@
+/*
+ Copyright (C) Intel Corp.  2006.  All Rights Reserved.
+ Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
+ develop this 3D driver.
+ 
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+ 
+ The above copyright notice and this permission notice (including the
+ next paragraph) shall be included in all copies or substantial
+ portions of the Software.
+ 
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
+ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ 
+ **********************************************************************/
+ /*
+  * Authors:
+  *   Keith Whitwell <keith@tungstengraphics.com>
+  */
+                   
+
+#include "brw_context.h"
+#include "brw_state.h"
+#include "brw_defines.h"
+
+#include "main/macros.h"
+
+
+
+/* Samplers aren't strictly wm state from the hardware's perspective,
+ * but that is the only situation in which we use them in this driver.
+ */
+
+
+
+/* The brw (and related graphics cores) do not support GL_CLAMP.  The
+ * Intel drivers for "other operating systems" implement GL_CLAMP as
+ * GL_CLAMP_TO_EDGE, so the same is done here.
+ */
+static GLuint translate_wrap_mode( GLenum wrap )
+{
+   switch( wrap ) {
+   case GL_REPEAT: 
+      return BRW_TEXCOORDMODE_WRAP;
+   case GL_CLAMP:  
+      return BRW_TEXCOORDMODE_CLAMP;
+   case GL_CLAMP_TO_EDGE: 
+      return BRW_TEXCOORDMODE_CLAMP; /* conform likes it this way */
+   case GL_CLAMP_TO_BORDER: 
+      return BRW_TEXCOORDMODE_CLAMP_BORDER;
+   case GL_MIRRORED_REPEAT: 
+      return BRW_TEXCOORDMODE_MIRROR;
+   default: 
+      return BRW_TEXCOORDMODE_WRAP;
+   }
+}
+
+
+static GLuint U_FIXED(GLfloat value, GLuint frac_bits)
+{
+   value *= (1<<frac_bits);
+   return value < 0 ? 0 : value;
+}
+
+static GLint S_FIXED(GLfloat value, GLuint frac_bits)
+{
+   return value * (1<<frac_bits);
+}
+
+
+static dri_bo *upload_default_color( struct brw_context *brw,
+				     const GLfloat *color )
+{
+   struct brw_sampler_default_color sdc;
+
+   COPY_4V(sdc.color, color); 
+   
+   return brw_cache_data( &brw->cache, BRW_SAMPLER_DEFAULT_COLOR, &sdc,
+			  NULL, 0 );
+}
+
+
+struct wm_sampler_key {
+   int sampler_count;
+
+   struct wm_sampler_entry {
+      GLenum tex_target;
+      GLenum wrap_r, wrap_s, wrap_t;
+      float maxlod, minlod;
+      float lod_bias;
+      float max_aniso;
+      GLenum minfilter, magfilter;
+      GLenum comparemode, comparefunc;
+      dri_bo *sdc_bo;
+
+      /** If target is cubemap, take context setting.
+       */
+      GLboolean seamless_cube_map;
+   } sampler[BRW_MAX_TEX_UNIT];
+};
+
+/**
+ * Sets the sampler state for a single unit based off of the sampler key
+ * entry.
+ */
+static void brw_update_sampler_state(struct wm_sampler_entry *key,
+				     dri_bo *sdc_bo,
+				     struct brw_sampler_state *sampler)
+{
+   _mesa_memset(sampler, 0, sizeof(*sampler));
+
+   switch (key->minfilter) {
+   case GL_NEAREST:
+      sampler->ss0.min_filter = BRW_MAPFILTER_NEAREST;
+      sampler->ss0.mip_filter = BRW_MIPFILTER_NONE;
+      break;
+   case GL_LINEAR:
+      sampler->ss0.min_filter = BRW_MAPFILTER_LINEAR;
+      sampler->ss0.mip_filter = BRW_MIPFILTER_NONE;
+      break;
+   case GL_NEAREST_MIPMAP_NEAREST:
+      sampler->ss0.min_filter = BRW_MAPFILTER_NEAREST;
+      sampler->ss0.mip_filter = BRW_MIPFILTER_NEAREST;
+      break;
+   case GL_LINEAR_MIPMAP_NEAREST:
+      sampler->ss0.min_filter = BRW_MAPFILTER_LINEAR;
+      sampler->ss0.mip_filter = BRW_MIPFILTER_NEAREST;
+      break;
+   case GL_NEAREST_MIPMAP_LINEAR:
+      sampler->ss0.min_filter = BRW_MAPFILTER_NEAREST;
+      sampler->ss0.mip_filter = BRW_MIPFILTER_LINEAR;
+      break;
+   case GL_LINEAR_MIPMAP_LINEAR:
+      sampler->ss0.min_filter = BRW_MAPFILTER_LINEAR;
+      sampler->ss0.mip_filter = BRW_MIPFILTER_LINEAR;
+      break;
+   default:
+      break;
+   }
+
+   /* Set Anisotropy: 
+    */
+   if (key->max_aniso > 1.0) {
+      sampler->ss0.min_filter = BRW_MAPFILTER_ANISOTROPIC; 
+      sampler->ss0.mag_filter = BRW_MAPFILTER_ANISOTROPIC;
+
+      if (key->max_aniso > 2.0) {
+	 sampler->ss3.max_aniso = MIN2((key->max_aniso - 2) / 2,
+				       BRW_ANISORATIO_16);
+      }
+   }
+   else {
+      switch (key->magfilter) {
+      case GL_NEAREST:
+	 sampler->ss0.mag_filter = BRW_MAPFILTER_NEAREST;
+	 break;
+      case GL_LINEAR:
+	 sampler->ss0.mag_filter = BRW_MAPFILTER_LINEAR;
+	 break;
+      default:
+	 break;
+      }  
+   }
+
+   sampler->ss1.r_wrap_mode = translate_wrap_mode(key->wrap_r);
+   sampler->ss1.s_wrap_mode = translate_wrap_mode(key->wrap_s);
+   sampler->ss1.t_wrap_mode = translate_wrap_mode(key->wrap_t);
+
+   /* Cube-maps on 965 and later must use the same wrap mode for all 3
+    * coordinate dimensions.  Futher, only CUBE and CLAMP are valid.
+    */
+   if (key->tex_target == GL_TEXTURE_CUBE_MAP) {
+      if (key->seamless_cube_map &&
+	  (key->minfilter != GL_NEAREST || key->magfilter != GL_NEAREST)) {
+	 sampler->ss1.r_wrap_mode = BRW_TEXCOORDMODE_CUBE;
+	 sampler->ss1.s_wrap_mode = BRW_TEXCOORDMODE_CUBE;
+	 sampler->ss1.t_wrap_mode = BRW_TEXCOORDMODE_CUBE;
+      } else {
+	 sampler->ss1.r_wrap_mode = BRW_TEXCOORDMODE_CLAMP;
+	 sampler->ss1.s_wrap_mode = BRW_TEXCOORDMODE_CLAMP;
+	 sampler->ss1.t_wrap_mode = BRW_TEXCOORDMODE_CLAMP;
+      }
+   } else if (key->tex_target == GL_TEXTURE_1D) {
+      /* There's a bug in 1D texture sampling - it actually pays
+       * attention to the wrap_t value, though it should not.
+       * Override the wrap_t value here to GL_REPEAT to keep
+       * any nonexistent border pixels from floating in.
+       */
+      sampler->ss1.t_wrap_mode = BRW_TEXCOORDMODE_WRAP;
+   }
+
+
+   /* Set shadow function: 
+    */
+   if (key->comparemode == GL_COMPARE_R_TO_TEXTURE_ARB) {
+      /* Shadowing is "enabled" by emitting a particular sampler
+       * message (sample_c).  So need to recompile WM program when
+       * shadow comparison is enabled on each/any texture unit.
+       */
+      sampler->ss0.shadow_function =
+	 intel_translate_shadow_compare_func(key->comparefunc);
+   }
+
+   /* Set LOD bias: 
+    */
+   sampler->ss0.lod_bias = S_FIXED(CLAMP(key->lod_bias, -16, 15), 6);
+
+   sampler->ss0.lod_preclamp = 1; /* OpenGL mode */
+   sampler->ss0.default_color_mode = 0; /* OpenGL/DX10 mode */
+
+   /* Set BaseMipLevel, MaxLOD, MinLOD: 
+    *
+    * XXX: I don't think that using firstLevel, lastLevel works,
+    * because we always setup the surface state as if firstLevel ==
+    * level zero.  Probably have to subtract firstLevel from each of
+    * these:
+    */
+   sampler->ss0.base_level = U_FIXED(0, 1);
+
+   sampler->ss1.max_lod = U_FIXED(MIN2(MAX2(key->maxlod, 0), 13), 6);
+   sampler->ss1.min_lod = U_FIXED(MIN2(MAX2(key->minlod, 0), 13), 6);
+   
+   sampler->ss2.default_color_pointer = sdc_bo->offset >> 5; /* reloc */
+}
+
+
+/** Sets up the cache key for sampler state for all texture units */
+static void
+brw_wm_sampler_populate_key(struct brw_context *brw,
+			    struct wm_sampler_key *key)
+{
+   GLcontext *ctx = &brw->intel.ctx;
+   int unit;
+
+   memset(key, 0, sizeof(*key));
+
+   for (unit = 0; unit < BRW_MAX_TEX_UNIT; unit++) {
+      if (ctx->Texture.Unit[unit]._ReallyEnabled) {
+	 struct wm_sampler_entry *entry = &key->sampler[unit];
+	 struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
+	 struct gl_texture_object *texObj = texUnit->_Current;
+	 struct intel_texture_object *intelObj = intel_texture_object(texObj);
+	 struct gl_texture_image *firstImage =
+	    texObj->Image[0][intelObj->firstLevel];
+
+         entry->tex_target = texObj->Target;
+
+	 entry->seamless_cube_map = (texObj->Target == GL_TEXTURE_CUBE_MAP)
+	    ? ctx->Texture.CubeMapSeamless : GL_FALSE;
+
+	 entry->wrap_r = texObj->WrapR;
+	 entry->wrap_s = texObj->WrapS;
+	 entry->wrap_t = texObj->WrapT;
+
+	 entry->maxlod = texObj->MaxLod;
+	 entry->minlod = texObj->MinLod;
+	 entry->lod_bias = texUnit->LodBias + texObj->LodBias;
+	 entry->max_aniso = texObj->MaxAnisotropy;
+	 entry->minfilter = texObj->MinFilter;
+	 entry->magfilter = texObj->MagFilter;
+	 entry->comparemode = texObj->CompareMode;
+         entry->comparefunc = texObj->CompareFunc;
+
+	 dri_bo_unreference(brw->wm.sdc_bo[unit]);
+	 if (firstImage->_BaseFormat == GL_DEPTH_COMPONENT) {
+	    float bordercolor[4] = {
+	       texObj->BorderColor[0],
+	       texObj->BorderColor[0],
+	       texObj->BorderColor[0],
+	       texObj->BorderColor[0]
+	    };
+	    /* GL specs that border color for depth textures is taken from the
+	     * R channel, while the hardware uses A.  Spam R into all the
+	     * channels for safety.
+	     */
+	    brw->wm.sdc_bo[unit] = upload_default_color(brw, bordercolor);
+	 } else {
+	    brw->wm.sdc_bo[unit] = upload_default_color(brw,
+							texObj->BorderColor);
+	 }
+	 key->sampler_count = unit + 1;
+      }
+   }
+}
+
+/* All samplers must be uploaded in a single contiguous array, which
+ * complicates various things.  However, this is still too confusing -
+ * FIXME: simplify all the different new texture state flags.
+ */
+static void upload_wm_samplers( struct brw_context *brw )
+{
+   GLcontext *ctx = &brw->intel.ctx;
+   struct wm_sampler_key key;
+   int i;
+
+   brw_wm_sampler_populate_key(brw, &key);
+
+   if (brw->wm.sampler_count != key.sampler_count) {
+      brw->wm.sampler_count = key.sampler_count;
+      brw->state.dirty.cache |= CACHE_NEW_SAMPLER;
+   }
+
+   dri_bo_unreference(brw->wm.sampler_bo);
+   brw->wm.sampler_bo = NULL;
+   if (brw->wm.sampler_count == 0)
+      return;
+
+   brw->wm.sampler_bo = brw_search_cache(&brw->cache, BRW_SAMPLER,
+					 &key, sizeof(key),
+					 brw->wm.sdc_bo, key.sampler_count,
+					 NULL);
+
+   /* If we didnt find it in the cache, compute the state and put it in the
+    * cache.
+    */
+   if (brw->wm.sampler_bo == NULL) {
+      struct brw_sampler_state sampler[BRW_MAX_TEX_UNIT];
+
+      memset(sampler, 0, sizeof(sampler));
+      for (i = 0; i < key.sampler_count; i++) {
+	 if (brw->wm.sdc_bo[i] == NULL)
+	    continue;
+
+	 brw_update_sampler_state(&key.sampler[i], brw->wm.sdc_bo[i],
+				  &sampler[i]);
+      }
+
+      brw->wm.sampler_bo = brw_upload_cache(&brw->cache, BRW_SAMPLER,
+					    &key, sizeof(key),
+					    brw->wm.sdc_bo, key.sampler_count,
+					    &sampler, sizeof(sampler),
+					    NULL, NULL);
+
+      /* Emit SDC relocations */
+      for (i = 0; i < BRW_MAX_TEX_UNIT; i++) {
+	 if (!ctx->Texture.Unit[i]._ReallyEnabled)
+	    continue;
+
+	 dri_bo_emit_reloc(brw->wm.sampler_bo,
+			   I915_GEM_DOMAIN_SAMPLER, 0,
+			   0,
+			   i * sizeof(struct brw_sampler_state) +
+			   offsetof(struct brw_sampler_state, ss2),
+			   brw->wm.sdc_bo[i]);
+      }
+   }
+}
+
+const struct brw_tracked_state brw_wm_samplers = {
+   .dirty = {
+      .mesa = _NEW_TEXTURE,
+      .brw = 0,
+      .cache = 0
+   },
+   .prepare = upload_wm_samplers,
+};
+
+