Merge branch 'master' of ../mesa into vulkan
[mesa.git] / src / mesa / drivers / dri / i965 / brw_wm.c
index 9745edac6cae0f353e110b6777c63acb9c8cb19b..1faf2eaa346cd9e1ae32d1098bba97260eaa8481 100644 (file)
@@ -1,51 +1,51 @@
 /*
- 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>
-  */
-             
+ * Copyright (C) Intel Corp.  2006.  All Rights Reserved.
+ * Intel funded Tungsten Graphics 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.
+ */
 #include "brw_context.h"
 #include "brw_wm.h"
 #include "brw_state.h"
+#include "brw_shader.h"
+#include "main/enums.h"
 #include "main/formats.h"
 #include "main/fbobject.h"
 #include "main/samplerobj.h"
+#include "main/framebuffer.h"
 #include "program/prog_parameter.h"
+#include "program/program.h"
+#include "intel_mipmap_tree.h"
 
-#include "glsl/ralloc.h"
+#include "util/ralloc.h"
 
 /**
  * Return a bitfield where bit n is set if barycentric interpolation mode n
  * (see enum brw_wm_barycentric_interp_mode) is needed by the fragment shader.
  */
-static unsigned
+unsigned
 brw_compute_barycentric_interp_modes(struct brw_context *brw,
                                      bool shade_model_flat,
+                                     bool persample_shading,
                                      const struct gl_fragment_program *fprog)
 {
    unsigned barycentric_interp_modes = 0;
@@ -58,7 +58,10 @@ brw_compute_barycentric_interp_modes(struct brw_context *brw,
    for (attr = 0; attr < VARYING_SLOT_MAX; ++attr) {
       enum glsl_interp_qualifier interp_qualifier =
          fprog->InterpQualifier[attr];
-      bool is_centroid = fprog->IsCentroid & BITFIELD64_BIT(attr);
+      bool is_centroid = (fprog->IsCentroid & BITFIELD64_BIT(attr)) &&
+         !persample_shading;
+      bool is_sample = (fprog->IsSample & BITFIELD64_BIT(attr)) ||
+         persample_shading;
       bool is_gl_Color = attr == VARYING_SLOT_COL0 || attr == VARYING_SLOT_COL1;
 
       /* Ignore unused inputs. */
@@ -79,8 +82,12 @@ brw_compute_barycentric_interp_modes(struct brw_context *brw,
          if (is_centroid) {
             barycentric_interp_modes |=
                1 << BRW_WM_NONPERSPECTIVE_CENTROID_BARYCENTRIC;
+         } else if (is_sample) {
+            barycentric_interp_modes |=
+               1 << BRW_WM_NONPERSPECTIVE_SAMPLE_BARYCENTRIC;
          }
-         if (!is_centroid || brw->needs_unlit_centroid_workaround) {
+         if ((!is_centroid && !is_sample) ||
+             brw->needs_unlit_centroid_workaround) {
             barycentric_interp_modes |=
                1 << BRW_WM_NONPERSPECTIVE_PIXEL_BARYCENTRIC;
          }
@@ -90,8 +97,12 @@ brw_compute_barycentric_interp_modes(struct brw_context *brw,
          if (is_centroid) {
             barycentric_interp_modes |=
                1 << BRW_WM_PERSPECTIVE_CENTROID_BARYCENTRIC;
+         } else if (is_sample) {
+            barycentric_interp_modes |=
+               1 << BRW_WM_PERSPECTIVE_SAMPLE_BARYCENTRIC;
          }
-         if (!is_centroid || brw->needs_unlit_centroid_workaround) {
+         if ((!is_centroid && !is_sample) ||
+             brw->needs_unlit_centroid_workaround) {
             barycentric_interp_modes |=
                1 << BRW_WM_PERSPECTIVE_PIXEL_BARYCENTRIC;
          }
@@ -101,54 +112,81 @@ brw_compute_barycentric_interp_modes(struct brw_context *brw,
    return barycentric_interp_modes;
 }
 
+static uint8_t
+computed_depth_mode(struct gl_fragment_program *fp)
+{
+   if (fp->Base.OutputsWritten & BITFIELD64_BIT(FRAG_RESULT_DEPTH)) {
+      switch (fp->FragDepthLayout) {
+      case FRAG_DEPTH_LAYOUT_NONE:
+      case FRAG_DEPTH_LAYOUT_ANY:
+         return BRW_PSCDEPTH_ON;
+      case FRAG_DEPTH_LAYOUT_GREATER:
+         return BRW_PSCDEPTH_ON_GE;
+      case FRAG_DEPTH_LAYOUT_LESS:
+         return BRW_PSCDEPTH_ON_LE;
+      case FRAG_DEPTH_LAYOUT_UNCHANGED:
+         return BRW_PSCDEPTH_OFF;
+      }
+   }
+   return BRW_PSCDEPTH_OFF;
+}
+
 bool
-brw_wm_prog_data_compare(const void *in_a, const void *in_b,
-                         int aux_size, const void *in_key)
+brw_wm_prog_data_compare(const void *in_a, const void *in_b)
 {
    const struct brw_wm_prog_data *a = in_a;
    const struct brw_wm_prog_data *b = in_b;
 
-   /* Compare all the struct up to the pointers. */
-   if (memcmp(a, b, offsetof(struct brw_wm_prog_data, param)))
-      return false;
-
-   if (memcmp(a->param, b->param, a->nr_params * sizeof(void *)))
+   /* Compare the base structure. */
+   if (!brw_stage_prog_data_compare(&a->base, &b->base))
       return false;
 
-   if (memcmp(a->pull_param, b->pull_param, a->nr_pull_params * sizeof(void *)))
+   /* Compare the rest of the structure. */
+   const unsigned offset = sizeof(struct brw_stage_prog_data);
+   if (memcmp(((char *) a) + offset, ((char *) b) + offset,
+              sizeof(struct brw_wm_prog_data) - offset))
       return false;
 
    return true;
 }
 
-void
-brw_wm_prog_data_free(const void *in_prog_data)
-{
-   const struct brw_wm_prog_data *prog_data = in_prog_data;
-
-   ralloc_free((void *)prog_data->param);
-   ralloc_free((void *)prog_data->pull_param);
-}
-
 /**
  * All Mesa program -> GPU code generation goes through this function.
  * Depending on the instructions used (i.e. flow control instructions)
  * we'll use one of two code generators.
  */
-bool do_wm_prog(struct brw_context *brw,
-               struct gl_shader_program *prog,
-               struct brw_fragment_program *fp,
-               struct brw_wm_prog_key *key)
+bool
+brw_codegen_wm_prog(struct brw_context *brw,
+                    struct gl_shader_program *prog,
+                    struct brw_fragment_program *fp,
+                    struct brw_wm_prog_key *key)
 {
-   struct brw_wm_compile *c;
+   struct gl_context *ctx = &brw->ctx;
+   void *mem_ctx = ralloc_context(NULL);
+   struct brw_wm_prog_data prog_data;
    const GLuint *program;
-   struct gl_shader *fs = NULL;
+   struct brw_shader *fs = NULL;
    GLuint program_size;
+   bool start_busy = false;
+   double start_time = 0;
 
    if (prog)
-      fs = prog->_LinkedShaders[MESA_SHADER_FRAGMENT];
+      fs = (struct brw_shader *)prog->_LinkedShaders[MESA_SHADER_FRAGMENT];
 
-   c = rzalloc(NULL, struct brw_wm_compile);
+   memset(&prog_data, 0, sizeof(prog_data));
+   /* key->alpha_test_func means simulating alpha testing via discards,
+    * so the shader definitely kills pixels.
+    */
+   prog_data.uses_kill = fp->program.UsesKill || key->alpha_test_func;
+   prog_data.uses_omask =
+      fp->program.Base.OutputsWritten & BITFIELD64_BIT(FRAG_RESULT_SAMPLE_MASK);
+   prog_data.computed_depth_mode = computed_depth_mode(&fp->program);
+
+   prog_data.early_fragment_tests = fs && fs->base.EarlyFragmentTests;
+
+   /* Use ALT floating point mode for ARB programs so that 0^0 == 1. */
+   if (!prog)
+      prog_data.base.use_alt_mode = true;
 
    /* Allocate the references to the uniforms that will end up in the
     * prog_data associated with the compiled program, and which will be freed
@@ -156,47 +194,67 @@ bool do_wm_prog(struct brw_context *brw,
     */
    int param_count;
    if (fs) {
-      param_count = fs->num_uniform_components;
+      param_count = fs->base.num_uniform_components +
+                    fs->base.NumImages * BRW_IMAGE_PARAM_SIZE;
+      prog_data.base.nr_image_params = fs->base.NumImages;
    } else {
       param_count = fp->program.Base.Parameters->NumParameters * 4;
    }
    /* The backend also sometimes adds params for texture size. */
-   param_count += 2 * BRW_MAX_TEX_UNIT;
-   c->prog_data.param = rzalloc_array(NULL, const float *, param_count);
-   c->prog_data.pull_param = rzalloc_array(NULL, const float *, param_count);
-
-   memcpy(&c->key, key, sizeof(*key));
-
-   c->prog_data.barycentric_interp_modes =
-      brw_compute_barycentric_interp_modes(brw, c->key.flat_shade,
+   param_count += 2 * ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits;
+   prog_data.base.param =
+      rzalloc_array(NULL, const gl_constant_value *, param_count);
+   prog_data.base.pull_param =
+      rzalloc_array(NULL, const gl_constant_value *, param_count);
+   prog_data.base.image_param =
+      rzalloc_array(NULL, struct brw_image_param,
+                    prog_data.base.nr_image_params);
+   prog_data.base.nr_params = param_count;
+
+   prog_data.barycentric_interp_modes =
+      brw_compute_barycentric_interp_modes(brw, key->flat_shade,
+                                           key->persample_shading,
                                            &fp->program);
 
-   program = brw_wm_fs_emit(brw, c, &fp->program, prog, &program_size);
-   if (program == NULL)
+   if (unlikely(brw->perf_debug)) {
+      start_busy = (brw->batch.last_bo &&
+                    drm_intel_bo_busy(brw->batch.last_bo));
+      start_time = get_time();
+   }
+
+   program = brw_wm_fs_emit(brw, mem_ctx, key, &prog_data,
+                            &fp->program, prog, &program_size);
+   if (program == NULL) {
+      ralloc_free(mem_ctx);
       return false;
+   }
 
-   /* Scratch space is used for register spilling */
-   if (c->last_scratch) {
-      perf_debug("Fragment shader triggered register spilling.  "
-                 "Try reducing the number of live scalar values to "
-                 "improve performance.\n");
+   if (unlikely(brw->perf_debug) && fs) {
+      if (fs->compiled_once)
+         brw_wm_debug_recompile(brw, prog, key);
+      fs->compiled_once = true;
 
-      c->prog_data.total_scratch = brw_get_scratch_size(c->last_scratch);
+      if (start_busy && !drm_intel_bo_busy(brw->batch.last_bo)) {
+         perf_debug("FS compile took %.03f ms and stalled the GPU\n",
+                    (get_time() - start_time) * 1000);
+      }
+   }
 
+   if (prog_data.base.total_scratch) {
       brw_get_scratch_bo(brw, &brw->wm.base.scratch_bo,
-                        c->prog_data.total_scratch * brw->max_wm_threads);
+                        prog_data.base.total_scratch * brw->max_wm_threads);
    }
 
    if (unlikely(INTEL_DEBUG & DEBUG_WM))
       fprintf(stderr, "\n");
 
-   brw_upload_cache(&brw->cache, BRW_WM_PROG,
-                   &c->key, sizeof(c->key),
+   brw_upload_cache(&brw->cache, BRW_CACHE_FS_PROG,
+                   key, sizeof(struct brw_wm_prog_key),
                    program, program_size,
-                   &c->prog_data, sizeof(c->prog_data),
+                   &prog_data, sizeof(prog_data),
                    &brw->wm.base.prog_offset, &brw->wm.prog_data);
 
-   ralloc_free(c);
+   ralloc_free(mem_ctx);
 
    return true;
 }
@@ -229,10 +287,16 @@ brw_debug_recompile_sampler_key(struct brw_context *brw,
                       old_key->gl_clamp_mask[1], key->gl_clamp_mask[1]);
    found |= key_debug(brw, "GL_CLAMP enabled on any texture unit's 3rd coordinate",
                       old_key->gl_clamp_mask[2], key->gl_clamp_mask[2]);
-   found |= key_debug(brw, "GL_MESA_ycbcr texturing\n",
-                      old_key->yuvtex_mask, key->yuvtex_mask);
-   found |= key_debug(brw, "GL_MESA_ycbcr UV swapping\n",
-                      old_key->yuvtex_swap_mask, key->yuvtex_swap_mask);
+   found |= key_debug(brw, "gather channel quirk on any texture unit",
+                      old_key->gather_channel_quirk_mask, key->gather_channel_quirk_mask);
+   found |= key_debug(brw, "compressed multisample layout",
+                      old_key->compressed_multisample_layout_mask,
+                      key->compressed_multisample_layout_mask);
+
+   for (unsigned int i = 0; i < MAX_SAMPLERS; i++) {
+      found |= key_debug(brw, "textureGather workarounds",
+                         old_key->gen6_gather_wa[i], key->gen6_gather_wa[i]);
+   }
 
    return found;
 }
@@ -250,7 +314,7 @@ brw_wm_debug_recompile(struct brw_context *brw,
 
    for (unsigned int i = 0; i < brw->cache.size; i++) {
       for (c = brw->cache.items[i]; c; c = c->next) {
-         if (c->cache_id == BRW_WM_PROG) {
+         if (c->cache_id == BRW_CACHE_FS_PROG) {
             old_key = c->key;
 
             if (old_key->program_string_id == key->program_string_id)
@@ -273,6 +337,10 @@ brw_wm_debug_recompile(struct brw_context *brw,
                       old_key->stats_wm, key->stats_wm);
    found |= key_debug(brw, "flat shading",
                       old_key->flat_shade, key->flat_shade);
+   found |= key_debug(brw, "per-sample shading",
+                      old_key->persample_shading, key->persample_shading);
+   found |= key_debug(brw, "per-sample shading and 2x MSAA",
+                      old_key->persample_2x, key->persample_2x);
    found |= key_debug(brw, "number of color buffers",
                       old_key->nr_color_regions, key->nr_color_regions);
    found |= key_debug(brw, "MRT alpha test or alpha-to-coverage",
@@ -287,6 +355,10 @@ brw_wm_debug_recompile(struct brw_context *brw,
                       old_key->drawable_height, key->drawable_height);
    found |= key_debug(brw, "input slots valid",
                       old_key->input_slots_valid, key->input_slots_valid);
+   found |= key_debug(brw, "mrt alpha test function",
+                      old_key->alpha_test_func, key->alpha_test_func);
+   found |= key_debug(brw, "mrt alpha test reference value",
+                      old_key->alpha_test_ref, key->alpha_test_ref);
 
    found |= brw_debug_recompile_sampler_key(brw, &old_key->tex, &key->tex);
 
@@ -295,6 +367,22 @@ brw_wm_debug_recompile(struct brw_context *brw,
    }
 }
 
+static uint8_t
+gen6_gather_workaround(GLenum internalformat)
+{
+   switch (internalformat) {
+   case GL_R8I: return WA_SIGN | WA_8BIT;
+   case GL_R8UI: return WA_8BIT;
+   case GL_R16I: return WA_SIGN | WA_16BIT;
+   case GL_R16UI: return WA_16BIT;
+   default:
+      /* Note that even though GL_R32I and GL_R32UI have format overrides in
+       * the surface state, there is no shader w/a required.
+       */
+      return 0;
+   }
+}
+
 void
 brw_populate_sampler_prog_key_data(struct gl_context *ctx,
                                   const struct gl_program *prog,
@@ -312,7 +400,7 @@ brw_populate_sampler_prog_key_data(struct gl_context *ctx,
       int unit_id = prog->SamplerUnits[s];
       const struct gl_texture_unit *unit = &ctx->Texture.Unit[unit_id];
 
-      if (unit->_ReallyEnabled && unit->_Current->Target != GL_TEXTURE_BUFFER) {
+      if (unit->_Current && unit->_Current->Target != GL_TEXTURE_BUFFER) {
         const struct gl_texture_object *t = unit->_Current;
         const struct gl_texture_image *img = t->Image[0][t->BaseLevel];
         struct gl_sampler_object *sampler = _mesa_get_samplerobj(ctx, unit_id);
@@ -324,16 +412,11 @@ brw_populate_sampler_prog_key_data(struct gl_context *ctx,
          /* Haswell handles texture swizzling as surface format overrides
           * (except for GL_ALPHA); all other platforms need MOVs in the shader.
           */
-         if (!brw->is_haswell || alpha_depth)
+         if (alpha_depth || (brw->gen < 8 && !brw->is_haswell))
             key->swizzles[s] = brw_get_texture_swizzle(ctx, t);
 
-        if (img->InternalFormat == GL_YCBCR_MESA) {
-           key->yuvtex_mask |= 1 << s;
-           if (img->TexFormat == MESA_FORMAT_YCBCR)
-               key->yuvtex_swap_mask |= 1 << s;
-        }
-
-        if (sampler->MinFilter != GL_NEAREST &&
+        if (brw->gen < 8 &&
+             sampler->MinFilter != GL_NEAREST &&
             sampler->MagFilter != GL_NEAREST) {
            if (sampler->WrapS == GL_CLAMP)
               key->gl_clamp_mask[0] |= 1 << s;
@@ -342,21 +425,70 @@ brw_populate_sampler_prog_key_data(struct gl_context *ctx,
            if (sampler->WrapR == GL_CLAMP)
               key->gl_clamp_mask[2] |= 1 << s;
         }
+
+         /* gather4's channel select for green from RG32F is broken; requires
+          * a shader w/a on IVB; fixable with just SCS on HSW.
+          */
+         if (brw->gen == 7 && !brw->is_haswell && prog->UsesGather) {
+            if (img->InternalFormat == GL_RG32F)
+               key->gather_channel_quirk_mask |= 1 << s;
+         }
+
+         /* Gen6's gather4 is broken for UINT/SINT; we treat them as
+          * UNORM/FLOAT instead and fix it in the shader.
+          */
+         if (brw->gen == 6 && prog->UsesGather) {
+            key->gen6_gather_wa[s] = gen6_gather_workaround(img->InternalFormat);
+         }
+
+         /* If this is a multisample sampler, and uses the CMS MSAA layout,
+          * then we need to emit slightly different code to first sample the
+          * MCS surface.
+          */
+         struct intel_texture_object *intel_tex =
+            intel_texture_object((struct gl_texture_object *)t);
+
+         if (brw->gen >= 7 &&
+             intel_tex->mt->msaa_layout == INTEL_MSAA_LAYOUT_CMS) {
+            key->compressed_multisample_layout_mask |= 1 << s;
+         }
       }
    }
 }
 
-static void brw_wm_populate_key( struct brw_context *brw,
-                                struct brw_wm_prog_key *key )
+static bool
+brw_wm_state_dirty (struct brw_context *brw)
+{
+   return brw_state_dirty(brw,
+                          _NEW_BUFFERS |
+                          _NEW_COLOR |
+                          _NEW_DEPTH |
+                          _NEW_FRAG_CLAMP |
+                          _NEW_HINT |
+                          _NEW_LIGHT |
+                          _NEW_LINE |
+                          _NEW_MULTISAMPLE |
+                          _NEW_POLYGON |
+                          _NEW_STENCIL |
+                          _NEW_TEXTURE,
+                          BRW_NEW_FRAGMENT_PROGRAM |
+                          BRW_NEW_REDUCED_PRIMITIVE |
+                          BRW_NEW_STATS_WM |
+                          BRW_NEW_VUE_MAP_GEOM_OUT);
+}
+
+static void
+brw_wm_populate_key(struct brw_context *brw, struct brw_wm_prog_key *key)
 {
    struct gl_context *ctx = &brw->ctx;
    /* BRW_NEW_FRAGMENT_PROGRAM */
-   const struct brw_fragment_program *fp = 
-      (struct brw_fragment_program *)brw->fragment_program;
+   const struct brw_fragment_program *fp =
+      (struct brw_fragment_program *) brw->fragment_program;
    const struct gl_program *prog = (struct gl_program *) brw->fragment_program;
    GLuint lookup = 0;
    GLuint line_aa;
    bool program_uses_dfdy = fp->program.UsesDFdy;
+   const bool multisample_fbo = _mesa_geometric_samples(ctx->DrawBuffer) > 1;
 
    memset(key, 0, sizeof(*key));
 
@@ -417,13 +549,8 @@ static void brw_wm_populate_key( struct brw_context *brw,
    key->line_aa = line_aa;
 
    /* _NEW_HINT */
-   if (brw->disable_derivative_optimization) {
-      key->high_quality_derivatives =
-         ctx->Hint.FragmentShaderDerivative != GL_FASTEST;
-   } else {
-      key->high_quality_derivatives =
-         ctx->Hint.FragmentShaderDerivative == GL_NICEST;
-   }
+   key->high_quality_derivatives =
+      ctx->Hint.FragmentShaderDerivative == GL_NICEST;
 
    if (brw->gen < 6)
       key->stats_wm = brw->stats_wm;
@@ -460,7 +587,7 @@ static void brw_wm_populate_key( struct brw_context *brw,
     * drawable height in order to invert the Y axis.
     */
    if (fp->program.Base.InputsRead & VARYING_BIT_POS) {
-      key->drawable_height = ctx->DrawBuffer->Height;
+      key->drawable_height = _mesa_geometric_height(ctx->DrawBuffer);
    }
 
    if ((fp->program.Base.InputsRead & VARYING_BIT_POS) || program_uses_dfdy) {
@@ -474,55 +601,122 @@ static void brw_wm_populate_key( struct brw_context *brw,
    key->replicate_alpha = ctx->DrawBuffer->_NumColorDrawBuffers > 1 &&
       (ctx->Multisample.SampleAlphaToCoverage || ctx->Color.AlphaEnabled);
 
+   /* _NEW_BUFFERS _NEW_MULTISAMPLE */
+   /* Ignore sample qualifier while computing this flag. */
+   key->persample_shading =
+      _mesa_get_min_invocations_per_fragment(ctx, &fp->program, true) > 1;
+   if (key->persample_shading)
+      key->persample_2x = _mesa_geometric_samples(ctx->DrawBuffer) == 2;
+
+   key->compute_pos_offset =
+      _mesa_get_min_invocations_per_fragment(ctx, &fp->program, false) > 1 &&
+      fp->program.Base.SystemValuesRead & SYSTEM_BIT_SAMPLE_POS;
+
+   key->compute_sample_id =
+      multisample_fbo &&
+      ctx->Multisample.Enabled &&
+      (fp->program.Base.SystemValuesRead & SYSTEM_BIT_SAMPLE_ID);
+
    /* BRW_NEW_VUE_MAP_GEOM_OUT */
    if (brw->gen < 6 || _mesa_bitcount_64(fp->program.Base.InputsRead &
                                          BRW_FS_VARYING_INPUT_MASK) > 16)
       key->input_slots_valid = brw->vue_map_geom_out.slots_valid;
 
+
+   /* _NEW_COLOR | _NEW_BUFFERS */
+   /* Pre-gen6, the hardware alpha test always used each render
+    * target's alpha to do alpha test, as opposed to render target 0's alpha
+    * like GL requires.  Fix that by building the alpha test into the
+    * shader, and we'll skip enabling the fixed function alpha test.
+    */
+   if (brw->gen < 6 && ctx->DrawBuffer->_NumColorDrawBuffers > 1 &&
+       ctx->Color.AlphaEnabled) {
+      key->alpha_test_func = ctx->Color.AlphaFunc;
+      key->alpha_test_ref = ctx->Color.AlphaRef;
+   }
+
    /* The unique fragment program ID */
    key->program_string_id = fp->id;
 }
 
-
-static void
+void
 brw_upload_wm_prog(struct brw_context *brw)
 {
    struct gl_context *ctx = &brw->ctx;
+   struct gl_shader_program *current = ctx->_Shader->_CurrentFragmentProgram;
    struct brw_wm_prog_key key;
    struct brw_fragment_program *fp = (struct brw_fragment_program *)
       brw->fragment_program;
 
+   if (!brw_wm_state_dirty(brw))
+      return;
+
    brw_wm_populate_key(brw, &key);
 
-   if (!brw_search_cache(&brw->cache, BRW_WM_PROG,
+   if (!brw_search_cache(&brw->cache, BRW_CACHE_FS_PROG,
                         &key, sizeof(key),
                         &brw->wm.base.prog_offset, &brw->wm.prog_data)) {
-      bool success = do_wm_prog(brw, ctx->Shader._CurrentFragmentProgram, fp,
-                               &key);
+      bool success = brw_codegen_wm_prog(brw, current, fp, &key);
       (void) success;
       assert(success);
    }
+   brw->wm.base.prog_data = &brw->wm.prog_data->base;
 }
 
+bool
+brw_fs_precompile(struct gl_context *ctx,
+                  struct gl_shader_program *shader_prog,
+                  struct gl_program *prog)
+{
+   struct brw_context *brw = brw_context(ctx);
+   struct brw_wm_prog_key key;
+
+   struct gl_fragment_program *fp = (struct gl_fragment_program *) prog;
+   struct brw_fragment_program *bfp = brw_fragment_program(fp);
+   bool program_uses_dfdy = fp->UsesDFdy;
+
+   memset(&key, 0, sizeof(key));
+
+   if (brw->gen < 6) {
+      if (fp->UsesKill)
+         key.iz_lookup |= IZ_PS_KILL_ALPHATEST_BIT;
+
+      if (fp->Base.OutputsWritten & BITFIELD64_BIT(FRAG_RESULT_DEPTH))
+         key.iz_lookup |= IZ_PS_COMPUTES_DEPTH_BIT;
+
+      /* Just assume depth testing. */
+      key.iz_lookup |= IZ_DEPTH_TEST_ENABLE_BIT;
+      key.iz_lookup |= IZ_DEPTH_WRITE_ENABLE_BIT;
+   }
+
+   if (brw->gen < 6 || _mesa_bitcount_64(fp->Base.InputsRead &
+                                         BRW_FS_VARYING_INPUT_MASK) > 16)
+      key.input_slots_valid = fp->Base.InputsRead | VARYING_BIT_POS;
+
+   brw_setup_tex_for_precompile(brw, &key.tex, &fp->Base);
+
+   if (fp->Base.InputsRead & VARYING_BIT_POS) {
+      key.drawable_height = ctx->DrawBuffer->Height;
+   }
+
+   key.nr_color_regions = _mesa_bitcount_64(fp->Base.OutputsWritten &
+         ~(BITFIELD64_BIT(FRAG_RESULT_DEPTH) |
+         BITFIELD64_BIT(FRAG_RESULT_SAMPLE_MASK)));
 
-const struct brw_tracked_state brw_wm_prog = {
-   .dirty = {
-      .mesa  = (_NEW_COLOR |
-               _NEW_DEPTH |
-               _NEW_STENCIL |
-               _NEW_POLYGON |
-               _NEW_LINE |
-               _NEW_HINT |
-               _NEW_LIGHT |
-               _NEW_FRAG_CLAMP |
-               _NEW_BUFFERS |
-               _NEW_TEXTURE |
-               _NEW_MULTISAMPLE),
-      .brw   = (BRW_NEW_FRAGMENT_PROGRAM |
-               BRW_NEW_REDUCED_PRIMITIVE |
-                BRW_NEW_VUE_MAP_GEOM_OUT |
-                BRW_NEW_STATS_WM)
-   },
-   .emit = brw_upload_wm_prog
-};
+   if ((fp->Base.InputsRead & VARYING_BIT_POS) || program_uses_dfdy) {
+      key.render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer) ||
+                          key.nr_color_regions > 1;
+   }
 
+   key.program_string_id = bfp->id;
+
+   uint32_t old_prog_offset = brw->wm.base.prog_offset;
+   struct brw_wm_prog_data *old_prog_data = brw->wm.prog_data;
+
+   bool success = brw_codegen_wm_prog(brw, shader_prog, bfp, &key);
+
+   brw->wm.base.prog_offset = old_prog_offset;
+   brw->wm.prog_data = old_prog_data;
+
+   return success;
+}