1 files changed, 281 insertions, 0 deletions
diff --git a/src/gallium/drivers/softpipe/sp_state_derived.c b/src/gallium/drivers/softpipe/sp_state_derived.c
new file mode 100644
index 0000000000..3ba4d934fd
--- /dev/null
+++ b/src/gallium/drivers/softpipe/sp_state_derived.c
@@ -0,0 +1,281 @@
+/**************************************************************************
+ * 
+ * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ * 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, sub license, 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS 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 "util/u_math.h"
+#include "util/u_memory.h"
+#include "pipe/p_shader_tokens.h"
+#include "draw/draw_context.h"
+#include "draw/draw_vertex.h"
+#include "sp_context.h"
+#include "sp_screen.h"
+#include "sp_state.h"
+#include "sp_texture.h"
+#include "sp_tex_tile_cache.h"
+
+
+/**
+ * Mark the current vertex layout as "invalid".
+ * We'll validate the vertex layout later, when we start to actually
+ * render a point or line or tri.
+ */
+static void
+invalidate_vertex_layout(struct softpipe_context *softpipe)
+{
+   softpipe->vertex_info.num_attribs =  0;
+}
+
+
+/**
+ * The vertex info describes how to convert the post-transformed vertices
+ * (simple float[][4]) used by the 'draw' module into vertices for
+ * rasterization.
+ *
+ * This function validates the vertex layout and returns a pointer to a
+ * vertex_info object.
+ */
+struct vertex_info *
+softpipe_get_vertex_info(struct softpipe_context *softpipe)
+{
+   struct vertex_info *vinfo = &softpipe->vertex_info;
+
+   if (vinfo->num_attribs == 0) {
+      /* compute vertex layout now */
+      const struct sp_fragment_shader *spfs = softpipe->fs;
+      struct vertex_info *vinfo_vbuf = &softpipe->vertex_info_vbuf;
+      const uint num = draw_num_shader_outputs(softpipe->draw);
+      uint i;
+
+      /* Tell draw_vbuf to simply emit the whole post-xform vertex
+       * as-is.  No longer any need to try and emit draw vertex_header
+       * info.
+       */
+      vinfo_vbuf->num_attribs = 0;
+      for (i = 0; i < num; i++) {
+	 draw_emit_vertex_attr(vinfo_vbuf, EMIT_4F, INTERP_PERSPECTIVE, i);
+      }
+      draw_compute_vertex_size(vinfo_vbuf);
+
+      /*
+       * Loop over fragment shader inputs, searching for the matching output
+       * from the vertex shader.
+       */
+      vinfo->num_attribs = 0;
+      for (i = 0; i < spfs->info.num_inputs; i++) {
+         int src;
+         enum interp_mode interp;
+
+         switch (spfs->info.input_interpolate[i]) {
+         case TGSI_INTERPOLATE_CONSTANT:
+            interp = INTERP_CONSTANT;
+            break;
+         case TGSI_INTERPOLATE_LINEAR:
+            interp = INTERP_LINEAR;
+            break;
+         case TGSI_INTERPOLATE_PERSPECTIVE:
+            interp = INTERP_PERSPECTIVE;
+            break;
+         default:
+            assert(0);
+            interp = INTERP_LINEAR;
+         }
+
+         switch (spfs->info.input_semantic_name[i]) {
+         case TGSI_SEMANTIC_POSITION:
+            interp = INTERP_POS;
+            break;
+
+         case TGSI_SEMANTIC_COLOR:
+            if (softpipe->rasterizer->flatshade) {
+               interp = INTERP_CONSTANT;
+            }
+            break;
+         }
+
+         /* this includes texcoords and varying vars */
+         src = draw_find_shader_output(softpipe->draw,
+                                       spfs->info.input_semantic_name[i],
+                                       spfs->info.input_semantic_index[i]);
+         draw_emit_vertex_attr(vinfo, EMIT_4F, interp, src);
+      }
+
+      softpipe->psize_slot = draw_find_shader_output(softpipe->draw,
+                                                 TGSI_SEMANTIC_PSIZE, 0);
+      if (softpipe->psize_slot > 0) {
+         draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT,
+                               softpipe->psize_slot);
+      }
+
+      draw_compute_vertex_size(vinfo);
+   }
+
+   return vinfo;
+}
+
+
+/**
+ * Called from vbuf module.
+ *
+ * Note that there's actually two different vertex layouts in softpipe.
+ *
+ * The normal one is computed in softpipe_get_vertex_info() above and is
+ * used by the point/line/tri "setup" code.
+ *
+ * The other one (this one) is only used by the vbuf module (which is
+ * not normally used by default but used in testing).  For the vbuf module,
+ * we basically want to pass-through the draw module's vertex layout as-is.
+ * When the softpipe vbuf code begins drawing, the normal vertex layout
+ * will come into play again.
+ */
+struct vertex_info *
+softpipe_get_vbuf_vertex_info(struct softpipe_context *softpipe)
+{
+   (void) softpipe_get_vertex_info(softpipe);
+   return &softpipe->vertex_info_vbuf;
+}
+
+
+/**
+ * Recompute cliprect from scissor bounds, scissor enable and surface size.
+ */
+static void
+compute_cliprect(struct softpipe_context *sp)
+{
+   /* SP_NEW_FRAMEBUFFER
+    */
+   uint surfWidth = sp->framebuffer.width;
+   uint surfHeight = sp->framebuffer.height;
+
+   /* SP_NEW_RASTERIZER
+    */
+   if (sp->rasterizer->scissor) {
+
+      /* SP_NEW_SCISSOR
+       *
+       * clip to scissor rect:
+       */
+      sp->cliprect.minx = MAX2(sp->scissor.minx, 0);
+      sp->cliprect.miny = MAX2(sp->scissor.miny, 0);
+      sp->cliprect.maxx = MIN2(sp->scissor.maxx, surfWidth);
+      sp->cliprect.maxy = MIN2(sp->scissor.maxy, surfHeight);
+   }
+   else {
+      /* clip to surface bounds */
+      sp->cliprect.minx = 0;
+      sp->cliprect.miny = 0;
+      sp->cliprect.maxx = surfWidth;
+      sp->cliprect.maxy = surfHeight;
+   }
+}
+
+
+static void
+update_tgsi_samplers( struct softpipe_context *softpipe )
+{
+   unsigned i;
+
+   softpipe_reset_sampler_varients( softpipe );
+
+   for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
+      struct softpipe_tex_tile_cache *tc = softpipe->tex_cache[i];
+      if (tc->texture) {
+         struct softpipe_resource *spt = softpipe_resource(tc->texture);
+         if (spt->timestamp != tc->timestamp) {
+	    sp_tex_tile_cache_validate_texture( tc );
+            /*
+            _debug_printf("INV %d %d\n", tc->timestamp, spt->timestamp);
+            */
+            tc->timestamp = spt->timestamp;
+         }
+      }
+   }
+
+   for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
+      struct softpipe_tex_tile_cache *tc = softpipe->vertex_tex_cache[i];
+
+      if (tc->texture) {
+         struct softpipe_resource *spt = softpipe_resource(tc->texture);
+
+         if (spt->timestamp != tc->timestamp) {
+	    sp_tex_tile_cache_validate_texture(tc);
+            tc->timestamp = spt->timestamp;
+         }
+      }
+   }
+
+   for (i = 0; i < PIPE_MAX_GEOMETRY_SAMPLERS; i++) {
+      struct softpipe_tex_tile_cache *tc = softpipe->geometry_tex_cache[i];
+
+      if (tc->texture) {
+         struct softpipe_resource *spt = softpipe_resource(tc->texture);
+
+         if (spt->timestamp != tc->timestamp) {
+	    sp_tex_tile_cache_validate_texture(tc);
+            tc->timestamp = spt->timestamp;
+         }
+      }
+   }
+}
+
+
+/* Hopefully this will remain quite simple, otherwise need to pull in
+ * something like the state tracker mechanism.
+ */
+void softpipe_update_derived( struct softpipe_context *softpipe )
+{
+   struct softpipe_screen *sp_screen = softpipe_screen(softpipe->pipe.screen);
+
+   /* Check for updated textures.
+    */
+   if (softpipe->tex_timestamp != sp_screen->timestamp) {
+      softpipe->tex_timestamp = sp_screen->timestamp;
+      softpipe->dirty |= SP_NEW_TEXTURE;
+   }
+      
+   if (softpipe->dirty & (SP_NEW_SAMPLER |
+                          SP_NEW_TEXTURE |
+                          SP_NEW_FS | 
+                          SP_NEW_VS))
+      update_tgsi_samplers( softpipe );
+
+   if (softpipe->dirty & (SP_NEW_RASTERIZER |
+                          SP_NEW_FS |
+                          SP_NEW_VS))
+      invalidate_vertex_layout( softpipe );
+
+   if (softpipe->dirty & (SP_NEW_SCISSOR |
+                          SP_NEW_RASTERIZER |
+                          SP_NEW_FRAMEBUFFER))
+      compute_cliprect(softpipe);
+
+   if (softpipe->dirty & (SP_NEW_BLEND |
+                          SP_NEW_DEPTH_STENCIL_ALPHA |
+                          SP_NEW_FRAMEBUFFER |
+                          SP_NEW_FS))
+      sp_build_quad_pipeline(softpipe);
+
+   softpipe->dirty = 0;
+}