Initial implementation of a software pipeline for quad rasterization (fragment ops).

This is very much like the clipper/setup pipeline for primitives.

11 files changed, 252 insertions, 23 deletions

diff --git a/src/mesa/pipe/softpipe/sp_context.c b/src/mesa/pipe/softpipe/sp_context.c
index 7ab65162bd..d1023fb782 100644
--- a/src/mesa/pipe/softpipe/sp_context.c
+++ b/src/mesa/pipe/softpipe/sp_context.c
@@ -32,9 +32,6 @@
 #include "imports.h"
 #include "macros.h"
 
-#include "tnl/t_context.h"
-#include "vf/vf.h"
-
 #include "sp_context.h"
 #include "sp_clear.h"
 #include "sp_prim.h"
@@ -88,6 +85,9 @@ struct pipe_context *softpipe_create( void )
    softpipe->prim.flatshade = prim_flatshade( softpipe );
    softpipe->prim.cull      = prim_cull( softpipe );
 
+   softpipe->quad.blend = sp_quad_blend_stage(softpipe);
+   softpipe->quad.shade = sp_quad_shade_stage(softpipe);
+   softpipe->quad.output = sp_quad_output_stage(softpipe);
 
    softpipe->draw = draw_create( softpipe );
 
diff --git a/src/mesa/pipe/softpipe/sp_context.h b/src/mesa/pipe/softpipe/sp_context.h
index 0a183ea385..4e6168fe33 100644
--- a/src/mesa/pipe/softpipe/sp_context.h
+++ b/src/mesa/pipe/softpipe/sp_context.h
@@ -36,6 +36,7 @@
 #include "pipe/p_state.h"
 #include "pipe/p_context.h"
 
+#include "sp_tile.h"
 
 
 struct softpipe_surface;
@@ -129,6 +130,18 @@ struct softpipe_context {
       GLuint vertex_size;
    } prim;
 
+   /*
+    * Software quad rendering pipeline
+    */
+   struct {
+      struct quad_stage *shade;
+      struct quad_stage *depth_test;
+      struct quad_stage *blend;
+      struct quad_stage *output;
+
+      struct quad_stage *first; /**< points to one of the above stages */
+   } quad;
+
    /* Temp kludge:
     */
    struct draw_context *draw;
@@ -144,6 +157,4 @@ softpipe_context( struct pipe_context *pipe )
 }
 
 
-
-
 #endif
diff --git a/src/mesa/pipe/softpipe/sp_prim_setup.c b/src/mesa/pipe/softpipe/sp_prim_setup.c
index 8ef0fcbf9c..29bb936540 100644
--- a/src/mesa/pipe/softpipe/sp_prim_setup.c
+++ b/src/mesa/pipe/softpipe/sp_prim_setup.c
@@ -36,6 +36,18 @@
 #include "sp_tile.h"
 
 
+
+/**
+ * Emit/render a quad.
+ * This passes the quad to the first stage of per-fragment operations.
+ */
+static INLINE void
+quad_emit(struct softpipe_context *sp, struct quad_header *quad)
+{
+   sp->quad.first->run(sp->quad.first, quad);
+}
+
+
 /**
  * Triangle edge info
  */
@@ -121,7 +133,7 @@ static void run_shader_block( struct setup_stage *setup,
    setup->quad.y0 = y;
    setup->quad.mask = mask;
 
-   quad_shade( setup->stage.softpipe, &setup->quad );
+   quad_emit(setup->stage.softpipe, &setup->quad);
 }
 
 
@@ -652,7 +664,7 @@ plot(struct setup_stage *setup, GLint x, GLint y)
       /* flush prev quad, start new quad */
 
       if (setup->quad.x0 != -1) 
-	 quad_shade(setup->stage.softpipe, &setup->quad);
+	 quad_emit(setup->stage.softpipe, &setup->quad);
 
       setup->quad.x0 = quadX;
       setup->quad.y0 = quadY;
@@ -755,7 +767,7 @@ setup_line(struct prim_stage *stage, struct prim_header *prim)
 
    /* draw final quad */
    if (setup->quad.mask) {
-      quad_shade(setup->stage.softpipe, &setup->quad);
+      quad_emit(setup->stage.softpipe, &setup->quad);
    }
 }
 
@@ -810,7 +822,7 @@ setup_point(struct prim_stage *stage, struct prim_header *prim)
       setup->quad.x0 = x - ix;
       setup->quad.y0 = y - iy;
       setup->quad.mask = (1 << ix) << (2 * iy);
-      quad_shade(setup->stage.softpipe, &setup->quad);
+      quad_emit(setup->stage.softpipe, &setup->quad);
    }
    else {
       const GLint ixmin = block((GLint) (x - halfSize));
@@ -870,7 +882,7 @@ setup_point(struct prim_stage *stage, struct prim_header *prim)
             if (setup->quad.mask) {
                setup->quad.x0 = ix;
                setup->quad.y0 = iy;
-               quad_shade( setup->stage.softpipe, &setup->quad );
+               quad_emit( setup->stage.softpipe, &setup->quad );
             }
          }
       }
diff --git a/src/mesa/pipe/softpipe/sp_state_derived.c b/src/mesa/pipe/softpipe/sp_state_derived.c
index 1f7329600a..b53c842366 100644
--- a/src/mesa/pipe/softpipe/sp_state_derived.c
+++ b/src/mesa/pipe/softpipe/sp_state_derived.c
@@ -132,5 +132,8 @@ void softpipe_update_derived( struct softpipe_context *softpipe )
    if (softpipe->dirty & (G_NEW_SETUP | G_NEW_FS))
       calculate_vertex_layout( softpipe );
 
+   if (softpipe->dirty & (G_NEW_BLEND | G_NEW_FS))
+      sp_build_quad_pipeline(softpipe);
+
    softpipe->dirty = 0;
 }
diff --git a/src/mesa/pipe/softpipe/sp_tile.c b/src/mesa/pipe/softpipe/sp_tile.c
new file mode 100644
index 0000000000..168872c64d
--- /dev/null
+++ b/src/mesa/pipe/softpipe/sp_tile.c
@@ -0,0 +1,24 @@
+
+
+#include "sp_context.h"
+
+
+
+void
+sp_build_quad_pipeline(struct softpipe_context *sp)
+{
+
+   sp->quad.first = sp->quad.output;
+
+   if (sp->blend.blend_enable) {
+      sp->quad.blend->next = sp->quad.first;
+      sp->quad.first = sp->quad.blend;
+   }
+
+   /* XXX always enable shader? */
+   if (1) {
+      sp->quad.shade->next = sp->quad.first;
+      sp->quad.first = sp->quad.shade;
+   }
+
+}
diff --git a/src/mesa/pipe/softpipe/sp_tile.h b/src/mesa/pipe/softpipe/sp_tile.h
index f4808b99d2..86c17180bf 100644
--- a/src/mesa/pipe/softpipe/sp_tile.h
+++ b/src/mesa/pipe/softpipe/sp_tile.h
@@ -33,10 +33,24 @@
 struct softpipe_context;
 struct quad_header;
 
-void quad_shade( struct softpipe_context *softpipe,
-		 struct quad_header *quad );
 
-void quad_output( struct softpipe_context *softpipe,
-		  struct quad_header *quad );
+struct quad_stage {
+   struct softpipe_context *softpipe;
+
+   struct quad_stage *next;
+
+   /** the stage action */
+   void (*run)(struct quad_stage *qs, struct quad_header *quad);
+};
+
+
+
+struct quad_stage *sp_quad_shade_stage( struct softpipe_context *softpipe );
+struct quad_stage *sp_quad_depth_test_stage( struct softpipe_context *softpipe );
+struct quad_stage *sp_quad_blend_stage( struct softpipe_context *softpipe );
+struct quad_stage *sp_quad_output_stage( struct softpipe_context *softpipe );
+
+void
+sp_build_quad_pipeline(struct softpipe_context *sp);
 
 #endif
diff --git a/src/mesa/pipe/softpipe/sp_tile_blend.c b/src/mesa/pipe/softpipe/sp_tile_blend.c
new file mode 100644
index 0000000000..5681528d06
--- /dev/null
+++ b/src/mesa/pipe/softpipe/sp_tile_blend.c
@@ -0,0 +1,70 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  6.5
+ *
+ * Copyright (C) 1999-2005  Brian Paul   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, 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 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
+ * BRIAN PAUL 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.
+ */
+
+/**
+ * quad blending
+ */
+
+#include "glheader.h"
+#include "imports.h"
+#include "sp_context.h"
+#include "sp_headers.h"
+#include "sp_surface.h"
+#include "sp_tile.h"
+
+
+
+static void
+blend_quad(struct quad_stage *qs, struct quad_header *quad)
+{
+   struct softpipe_context *softpipe = qs->softpipe;
+   GLfloat dest[4][QUAD_SIZE], result[4][QUAD_SIZE];
+   GLuint i;
+
+   /* XXX we're also looping in output_quad() !?! */
+
+   for (i = 0; i < softpipe->framebuffer.num_cbufs; i++) {
+      struct softpipe_surface *sps
+         = softpipe_surface(softpipe->framebuffer.cbufs[i]);
+   
+      sps->read_quad_f_swz(sps, quad->x0, quad->y0, dest);
+
+      /* XXX do blend here */
+
+      qs->next->run(qs->next, quad);
+   }
+}
+
+
+
+
+struct quad_stage *sp_quad_blend_stage( struct softpipe_context *softpipe )
+{
+   struct quad_stage *stage = CALLOC_STRUCT(quad_stage);
+
+   stage->softpipe = softpipe;
+   stage->run = blend_quad;
+
+   return stage;
+}
diff --git a/src/mesa/pipe/softpipe/sp_tile_depth_test.c b/src/mesa/pipe/softpipe/sp_tile_depth_test.c
new file mode 100644
index 0000000000..5bc2648531
--- /dev/null
+++ b/src/mesa/pipe/softpipe/sp_tile_depth_test.c
@@ -0,0 +1,73 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  6.5
+ *
+ * Copyright (C) 1999-2005  Brian Paul   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, 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 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
+ * BRIAN PAUL 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.
+ */
+
+/**
+ * quad blending
+ */
+
+#include "glheader.h"
+#include "imports.h"
+#include "sp_context.h"
+#include "sp_headers.h"
+#include "sp_surface.h"
+#include "sp_tile.h"
+
+
+
+static void
+depth_test_quad(struct quad_stage *qs, struct quad_header *quad)
+{
+#if 0
+   struct softpipe_context *softpipe = qs->softpipe;
+   GLfloat dest[4][QUAD_SIZE], result[4][QUAD_SIZE];
+   GLuint i;
+
+   /* XXX we're also looping in output_quad() !?! */
+
+   for (i = 0; i < softpipe->framebuffer.num_cbufs; i++) {
+      struct softpipe_surface *sps
+         = softpipe_surface(softpipe->framebuffer.cbufs[i]);
+   
+      sps->read_quad_f_swz(sps, quad->x0, quad->y0, dest);
+
+      /* XXX do blend here */
+
+   }
+#endif
+
+   qs->next->run(qs->next, quad);
+}
+
+
+
+
+struct quad_stage *sp_quad_depth_test_stage( struct softpipe_context *softpipe )
+{
+   struct quad_stage *stage = CALLOC_STRUCT(quad_stage);
+
+   stage->softpipe = softpipe;
+   stage->run = depth_test_quad;
+
+   return stage;
+}
diff --git a/src/mesa/pipe/softpipe/sp_tile_fs.c b/src/mesa/pipe/softpipe/sp_tile_fs.c
index c145fcf089..912831fefa 100644
--- a/src/mesa/pipe/softpipe/sp_tile_fs.c
+++ b/src/mesa/pipe/softpipe/sp_tile_fs.c
@@ -33,6 +33,7 @@
  */
 
 #include "glheader.h"
+#include "imports.h"
 #include "sp_context.h"
 #include "sp_headers.h"
 #include "sp_tile.h"
@@ -116,9 +117,10 @@ static INLINE void pinterp( struct exec_machine *exec,
 /* This should be done by the fragment shader execution unit (code
  * generated from the decl instructions).  Do it here for now.
  */
-void quad_shade( struct softpipe_context *softpipe,
-		 struct quad_header *quad )
+static void
+shade_quad( struct quad_stage *qs, struct quad_header *quad )
 {
+   struct softpipe_context *softpipe = qs->softpipe;
    struct exec_machine exec;
    GLfloat fx = quad->x0;
    GLfloat fy = quad->y0;
@@ -190,14 +192,17 @@ void quad_shade( struct softpipe_context *softpipe,
    }
 #endif
 
-
-   if (quad->mask)
-      quad_output( softpipe, quad );
+   qs->next->run(qs->next, quad);
 }
 
 
 
+struct quad_stage *sp_quad_shade_stage( struct softpipe_context *softpipe )
+{
+   struct quad_stage *stage = CALLOC_STRUCT(quad_stage);
 
+   stage->softpipe = softpipe;
+   stage->run = shade_quad;
 
-
-
+   return stage;
+}
diff --git a/src/mesa/pipe/softpipe/sp_tile_output.c b/src/mesa/pipe/softpipe/sp_tile_output.c
index 23086b7020..4f4421891b 100644
--- a/src/mesa/pipe/softpipe/sp_tile_output.c
+++ b/src/mesa/pipe/softpipe/sp_tile_output.c
@@ -33,6 +33,7 @@
  */
 
 #include "glheader.h"
+#include "imports.h"
 #include "sp_context.h"
 #include "sp_headers.h"
 #include "sp_surface.h"
@@ -60,9 +61,10 @@ static void mask_copy( GLfloat (*dest)[4],
  *
  * Note that surfaces support only full quad reads and writes.
  */
-void quad_output( struct softpipe_context *softpipe,
-		  struct quad_header *quad )
+static void
+output_quad(struct quad_stage *qs, struct quad_header *quad)
 {
+   struct softpipe_context *softpipe = qs->softpipe;
    GLuint i;
 
    for (i = 0; i < softpipe->framebuffer.num_cbufs; i++) {
@@ -87,3 +89,15 @@ void quad_output( struct softpipe_context *softpipe,
       }
    }
 }
+
+
+struct quad_stage *sp_quad_output_stage( struct softpipe_context *softpipe )
+{
+   struct quad_stage *stage = CALLOC_STRUCT(quad_stage);
+
+   stage->softpipe = softpipe;
+   stage->run = output_quad;
+
+   return stage;
+}
+
diff --git a/src/mesa/sources b/src/mesa/sources
index 97801648c4..d07bd3fbe0 100644
--- a/src/mesa/sources
+++ b/src/mesa/sources
@@ -171,6 +171,9 @@ SOFTPIPE_SOURCES = \
 	pipe/softpipe/sp_state_point.c \
 	pipe/softpipe/sp_state_setup.c \
 	pipe/softpipe/sp_state_surface.c \
+	pipe/softpipe/sp_tile.c \
+	pipe/softpipe/sp_tile_blend.c \
+	pipe/softpipe/sp_tile_depth_test.c \
 	pipe/softpipe/sp_tile_fs.c \
 	pipe/softpipe/sp_tile_output.c