i965g: re-starting from the dri driver

1 files changed, 375 insertions, 0 deletions

diff --git a/src/gallium/drivers/i965/brw_wm.c b/src/gallium/drivers/i965/brw_wm.c
new file mode 100644
index 0000000000..2292de94c4
--- /dev/null
+++ b/src/gallium/drivers/i965/brw_wm.c
@@ -0,0 +1,375 @@
+/*
+ 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 "main/texformat.h"
+#include "brw_context.h"
+#include "brw_util.h"
+#include "brw_wm.h"
+#include "brw_state.h"
+
+
+/** Return number of src args for given instruction */
+GLuint brw_wm_nr_args( GLuint opcode )
+{
+   switch (opcode) {
+   case WM_FRONTFACING:
+   case WM_PIXELXY:
+      return 0;
+   case WM_CINTERP:
+   case WM_WPOSXY:
+   case WM_DELTAXY:
+      return 1;
+   case WM_LINTERP:
+   case WM_PIXELW:
+      return 2;
+   case WM_FB_WRITE:
+   case WM_PINTERP:
+      return 3;
+   default:
+      assert(opcode < MAX_OPCODE);
+      return _mesa_num_inst_src_regs(opcode);
+   }
+}
+
+
+GLuint brw_wm_is_scalar_result( GLuint opcode )
+{
+   switch (opcode) {
+   case OPCODE_COS:
+   case OPCODE_EX2:
+   case OPCODE_LG2:
+   case OPCODE_POW:
+   case OPCODE_RCP:
+   case OPCODE_RSQ:
+   case OPCODE_SIN:
+   case OPCODE_DP3:
+   case OPCODE_DP4:
+   case OPCODE_DPH:
+   case OPCODE_DST:
+      return 1;
+      
+   default:
+      return 0;
+   }
+}
+
+
+/**
+ * Do GPU code generation for non-GLSL shader.  non-GLSL shaders have
+ * no flow control instructions so we can more readily do SSA-style
+ * optimizations.
+ */
+static void
+brw_wm_non_glsl_emit(struct brw_context *brw, struct brw_wm_compile *c)
+{
+   /* Augment fragment program.  Add instructions for pre- and
+    * post-fragment-program tasks such as interpolation and fogging.
+    */
+   brw_wm_pass_fp(c);
+
+   /* Translate to intermediate representation.  Build register usage
+    * chains.
+    */
+   brw_wm_pass0(c);
+
+   /* Dead code removal.
+    */
+   brw_wm_pass1(c);
+
+   /* Register allocation.
+    * Divide by two because we operate on 16 pixels at a time and require
+    * two GRF entries for each logical shader register.
+    */
+   c->grf_limit = BRW_WM_MAX_GRF / 2;
+
+   brw_wm_pass2(c);
+
+   /* how many general-purpose registers are used */
+   c->prog_data.total_grf = c->max_wm_grf;
+
+   /* Scratch space is used for register spilling */
+   if (c->last_scratch) {
+      c->prog_data.total_scratch = c->last_scratch + 0x40;
+   }
+   else {
+      c->prog_data.total_scratch = 0;
+   }
+
+   /* Emit GEN4 code.
+    */
+   brw_wm_emit(c);
+}
+
+
+/**
+ * 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.
+ */
+static void do_wm_prog( struct brw_context *brw,
+			struct brw_fragment_program *fp, 
+			struct brw_wm_prog_key *key)
+{
+   struct brw_wm_compile *c;
+   const GLuint *program;
+   GLuint program_size;
+
+   c = brw->wm.compile_data;
+   if (c == NULL) {
+      brw->wm.compile_data = calloc(1, sizeof(*brw->wm.compile_data));
+      c = brw->wm.compile_data;
+      if (c == NULL) {
+         /* Ouch - big out of memory problem.  Can't continue
+          * without triggering a segfault, no way to signal,
+          * so just return.
+          */
+         return;
+      }
+   } else {
+      memset(c, 0, sizeof(*brw->wm.compile_data));
+   }
+   memcpy(&c->key, key, sizeof(*key));
+
+   c->fp = fp;
+   c->env_param = brw->intel.ctx.FragmentProgram.Parameters;
+
+   brw_init_compile(brw, &c->func);
+
+   /* temporary sanity check assertion */
+   ASSERT(fp->isGLSL == brw_wm_is_glsl(&c->fp->program));
+
+   /*
+    * Shader which use GLSL features such as flow control are handled
+    * differently from "simple" shaders.
+    */
+   if (fp->isGLSL) {
+      c->dispatch_width = 8;
+      brw_wm_glsl_emit(brw, c);
+   }
+   else {
+      c->dispatch_width = 16;
+      brw_wm_non_glsl_emit(brw, c);
+   }
+
+   if (INTEL_DEBUG & DEBUG_WM)
+      fprintf(stderr, "\n");
+
+   /* get the program
+    */
+   program = brw_get_program(&c->func, &program_size);
+
+   dri_bo_unreference(brw->wm.prog_bo);
+   brw->wm.prog_bo = brw_upload_cache( &brw->cache, BRW_WM_PROG,
+				       &c->key, sizeof(c->key),
+				       NULL, 0,
+				       program, program_size,
+				       &c->prog_data,
+				       &brw->wm.prog_data );
+}
+
+
+
+static void brw_wm_populate_key( struct brw_context *brw,
+				 struct brw_wm_prog_key *key )
+{
+   GLcontext *ctx = &brw->intel.ctx;
+   /* BRW_NEW_FRAGMENT_PROGRAM */
+   const struct brw_fragment_program *fp = 
+      (struct brw_fragment_program *)brw->fragment_program;
+   GLboolean uses_depth = (fp->program.Base.InputsRead & (1 << FRAG_ATTRIB_WPOS)) != 0;
+   GLuint lookup = 0;
+   GLuint line_aa;
+   GLuint i;
+
+   memset(key, 0, sizeof(*key));
+
+   /* Build the index for table lookup
+    */
+   /* _NEW_COLOR */
+   if (fp->program.UsesKill ||
+       ctx->Color.AlphaEnabled)
+      lookup |= IZ_PS_KILL_ALPHATEST_BIT;
+
+   if (fp->program.Base.OutputsWritten & (1<<FRAG_RESULT_DEPTH))
+      lookup |= IZ_PS_COMPUTES_DEPTH_BIT;
+
+   /* _NEW_DEPTH */
+   if (ctx->Depth.Test)
+      lookup |= IZ_DEPTH_TEST_ENABLE_BIT;
+
+   if (ctx->Depth.Test &&  
+       ctx->Depth.Mask) /* ?? */
+      lookup |= IZ_DEPTH_WRITE_ENABLE_BIT;
+
+   /* _NEW_STENCIL */
+   if (ctx->Stencil._Enabled) {
+      lookup |= IZ_STENCIL_TEST_ENABLE_BIT;
+
+      if (ctx->Stencil.WriteMask[0] ||
+	  ctx->Stencil.WriteMask[ctx->Stencil._BackFace])
+	 lookup |= IZ_STENCIL_WRITE_ENABLE_BIT;
+   }
+
+   line_aa = AA_NEVER;
+
+   /* _NEW_LINE, _NEW_POLYGON, BRW_NEW_REDUCED_PRIMITIVE */
+   if (ctx->Line.SmoothFlag) {
+      if (brw->intel.reduced_primitive == GL_LINES) {
+	 line_aa = AA_ALWAYS;
+      }
+      else if (brw->intel.reduced_primitive == GL_TRIANGLES) {
+	 if (ctx->Polygon.FrontMode == GL_LINE) {
+	    line_aa = AA_SOMETIMES;
+
+	    if (ctx->Polygon.BackMode == GL_LINE ||
+		(ctx->Polygon.CullFlag &&
+		 ctx->Polygon.CullFaceMode == GL_BACK))
+	       line_aa = AA_ALWAYS;
+	 }
+	 else if (ctx->Polygon.BackMode == GL_LINE) {
+	    line_aa = AA_SOMETIMES;
+
+	    if ((ctx->Polygon.CullFlag &&
+		 ctx->Polygon.CullFaceMode == GL_FRONT))
+	       line_aa = AA_ALWAYS;
+	 }
+      }
+   }
+	 
+   brw_wm_lookup_iz(line_aa,
+		    lookup,
+		    uses_depth,
+		    key);
+
+
+   /* BRW_NEW_WM_INPUT_DIMENSIONS */
+   key->proj_attrib_mask = brw->wm.input_size_masks[4-1];
+
+   /* _NEW_LIGHT */
+   key->flat_shade = (ctx->Light.ShadeModel == GL_FLAT);
+
+   /* _NEW_HINT */
+   key->linear_color = (ctx->Hint.PerspectiveCorrection == GL_FASTEST);
+
+   /* _NEW_TEXTURE */
+   for (i = 0; i < BRW_MAX_TEX_UNIT; i++) {
+      const struct gl_texture_unit *unit = &ctx->Texture.Unit[i];
+
+      if (unit->_ReallyEnabled) {
+         const struct gl_texture_object *t = unit->_Current;
+         const struct gl_texture_image *img = t->Image[0][t->BaseLevel];
+	 if (img->InternalFormat == GL_YCBCR_MESA) {
+	    key->yuvtex_mask |= 1 << i;
+	    if (img->TexFormat->MesaFormat == MESA_FORMAT_YCBCR)
+		key->yuvtex_swap_mask |= 1 << i;
+	 }
+
+         key->tex_swizzles[i] = t->_Swizzle;
+      }
+      else {
+         key->tex_swizzles[i] = SWIZZLE_NOOP;
+      }
+   }
+
+   /* Shadow */
+   key->shadowtex_mask = fp->program.Base.ShadowSamplers;
+
+   /* _NEW_BUFFERS */
+   /*
+    * Include the draw buffer origin and height so that we can calculate
+    * fragment position values relative to the bottom left of the drawable,
+    * from the incoming screen origin relative position we get as part of our
+    * payload.
+    *
+    * We could avoid recompiling by including this as a constant referenced by
+    * our program, but if we were to do that it would also be nice to handle
+    * getting that constant updated at batchbuffer submit time (when we
+    * hold the lock and know where the buffer really is) rather than at emit
+    * time when we don't hold the lock and are just guessing.  We could also
+    * just avoid using this as key data if the program doesn't use
+    * fragment.position.
+    *
+    * This pretty much becomes moot with DRI2 and redirected buffers anyway,
+    * as our origins will always be zero then.
+    */
+   if (brw->intel.driDrawable != NULL) {
+      key->origin_x = brw->intel.driDrawable->x;
+      key->origin_y = brw->intel.driDrawable->y;
+      key->drawable_height = brw->intel.driDrawable->h;
+   }
+
+   /* CACHE_NEW_VS_PROG */
+   key->vp_outputs_written = brw->vs.prog_data->outputs_written & DO_SETUP_BITS;
+
+   /* The unique fragment program ID */
+   key->program_string_id = fp->id;
+}
+
+
+static void brw_prepare_wm_prog(struct brw_context *brw)
+{
+   struct brw_wm_prog_key key;
+   struct brw_fragment_program *fp = (struct brw_fragment_program *)
+      brw->fragment_program;
+     
+   brw_wm_populate_key(brw, &key);
+
+   /* Make an early check for the key.
+    */
+   dri_bo_unreference(brw->wm.prog_bo);
+   brw->wm.prog_bo = brw_search_cache(&brw->cache, BRW_WM_PROG,
+				      &key, sizeof(key),
+				      NULL, 0,
+				      &brw->wm.prog_data);
+   if (brw->wm.prog_bo == NULL)
+      do_wm_prog(brw, fp, &key);
+}
+
+
+const struct brw_tracked_state brw_wm_prog = {
+   .dirty = {
+      .mesa  = (_NEW_COLOR |
+		_NEW_DEPTH |
+                _NEW_HINT |
+		_NEW_STENCIL |
+		_NEW_POLYGON |
+		_NEW_LINE |
+		_NEW_LIGHT |
+		_NEW_BUFFERS |
+		_NEW_TEXTURE),
+      .brw   = (BRW_NEW_FRAGMENT_PROGRAM |
+		BRW_NEW_WM_INPUT_DIMENSIONS |
+		BRW_NEW_REDUCED_PRIMITIVE),
+      .cache = CACHE_NEW_VS_PROG,
+   },
+   .prepare = brw_prepare_wm_prog
+};
+