First stab at immutable state objects (create/bind/delete)

We want our state objects to be immutable, handled via the
create/bind/delete calls instead of struct propagation.
Only implementing the blend state to see how it would look like
and work.

15 files changed, 103 insertions, 50 deletions

diff --git a/src/mesa/pipe/failover/fo_context.h b/src/mesa/pipe/failover/fo_context.h
index 5666d4e8306..b065aa832a4 100644
--- a/src/mesa/pipe/failover/fo_context.h
+++ b/src/mesa/pipe/failover/fo_context.h
@@ -67,8 +67,9 @@ struct failover_context {
 
    /* The most recent drawing state as set by the driver:
     */
+   const struct pipe_blend_state *blend;
+
    struct pipe_alpha_test_state alpha_test;
-   struct pipe_blend_state blend;
    struct pipe_blend_color blend_color;
    struct pipe_clear_color_state clear_color;
    struct pipe_clip_state clip;
diff --git a/src/mesa/pipe/failover/fo_state.c b/src/mesa/pipe/failover/fo_state.c
index 097acf7d579..2357d7ef5ce 100644
--- a/src/mesa/pipe/failover/fo_state.c
+++ b/src/mesa/pipe/failover/fo_state.c
@@ -58,14 +58,14 @@ failover_set_alpha_test_state(struct pipe_context *pipe,
 
 
 static void 
-failover_set_blend_state( struct pipe_context *pipe,
+failover_bind_blend_state( struct pipe_context *pipe,
 			  const struct pipe_blend_state *blend )
 {
    struct failover_context *failover = failover_context(pipe);
 
-   failover->blend = *blend;
+   failover->blend = blend;
    failover->dirty |= FO_NEW_BLEND;
-   failover->hw->set_blend_state( failover->hw, blend );
+   failover->hw->bind_blend_state( failover->hw, blend );
 }
 
 
@@ -266,9 +266,10 @@ failover_set_vertex_element(struct pipe_context *pipe,
 void
 failover_init_state_functions( struct failover_context *failover )
 {
+   failover->pipe.bind_blend_state = failover_bind_blend_state;
+
    failover->pipe.set_alpha_test_state = failover_set_alpha_test_state;
    failover->pipe.set_blend_color = failover_set_blend_color;
-   failover->pipe.set_blend_state = failover_set_blend_state;
    failover->pipe.set_clip_state = failover_set_clip_state;
    failover->pipe.set_clear_color_state = failover_set_clear_color_state;
    failover->pipe.set_depth_state = failover_set_depth_test_state;
diff --git a/src/mesa/pipe/failover/fo_state_emit.c b/src/mesa/pipe/failover/fo_state_emit.c
index 52fcf5dbc95..77413d100b3 100644
--- a/src/mesa/pipe/failover/fo_state_emit.c
+++ b/src/mesa/pipe/failover/fo_state_emit.c
@@ -59,7 +59,7 @@ failover_state_emit( struct failover_context *failover )
       failover->sw->set_alpha_test_state( failover->sw, &failover->alpha_test );
 
    if (failover->dirty & FO_NEW_BLEND)
-      failover->sw->set_blend_state( failover->sw, &failover->blend );
+      failover->sw->bind_blend_state( failover->sw, failover->blend );
 
    if (failover->dirty & FO_NEW_BLEND_COLOR)
       failover->sw->set_blend_color( failover->sw, &failover->blend_color );
diff --git a/src/mesa/pipe/i915simple/i915_context.h b/src/mesa/pipe/i915simple/i915_context.h
index c30c79d83c9..215c5294fa6 100644
--- a/src/mesa/pipe/i915simple/i915_context.h
+++ b/src/mesa/pipe/i915simple/i915_context.h
@@ -123,8 +123,9 @@ struct i915_context
 
    /* The most recent drawing state as set by the driver:
     */
+   const struct pipe_blend_state *blend;
+
    struct pipe_alpha_test_state alpha_test;
-   struct pipe_blend_state blend;
    struct pipe_blend_color blend_color;
    struct pipe_clear_color_state clear_color;
    struct pipe_clip_state clip;
diff --git a/src/mesa/pipe/i915simple/i915_state.c b/src/mesa/pipe/i915simple/i915_state.c
index f5ea721cc8e..478988fd4a9 100644
--- a/src/mesa/pipe/i915simple/i915_state.c
+++ b/src/mesa/pipe/i915simple/i915_state.c
@@ -37,17 +37,37 @@
 
 /* None of this state is actually used for anything yet.
  */
-static void i915_set_blend_state( struct pipe_context *pipe,
+
+static const struct pipe_blend_state *
+i915_create_blend_state(struct pipe_context *pipe,
+                        const struct pipe_blend_state *blend)
+{
+   /*struct i915_context *i915 = i915_context(pipe);*/
+
+   struct pipe_blend_state *new_blend = malloc(sizeof(struct pipe_blend_state));
+   memcpy(new_blend, blend, sizeof(struct pipe_blend_state));
+
+   return new_blend;
+}
+
+static void i915_bind_blend_state( struct pipe_context *pipe,
 			     const struct pipe_blend_state *blend )
 {
    struct i915_context *i915 = i915_context(pipe);
 
-   i915->blend = *blend;
+   i915->blend = blend;
 
    i915->dirty |= I915_NEW_BLEND;
 }
 
 
+static void i915_delete_blend_state( struct pipe_context *pipe,
+			     const struct pipe_blend_state *blend )
+{
+   /*struct i915_context *i915 = i915_context(pipe);*/
+   free(blend);
+}
+
 static void i915_set_blend_color( struct pipe_context *pipe,
 			     const struct pipe_blend_color *blend_color )
 {
@@ -289,9 +309,12 @@ static void i915_set_vertex_element( struct pipe_context *pipe,
 void
 i915_init_state_functions( struct i915_context *i915 )
 {
+   i915->pipe.create_blend_state = i915_create_blend_state;
+   i915->pipe.bind_blend_state = i915_bind_blend_state;
+   i915->pipe.delete_blend_state = i915_delete_blend_state;
+
    i915->pipe.set_alpha_test_state = i915_set_alpha_test_state;
    i915->pipe.set_blend_color = i915_set_blend_color;
-   i915->pipe.set_blend_state = i915_set_blend_state;
    i915->pipe.set_clip_state = i915_set_clip_state;
    i915->pipe.set_clear_color_state = i915_set_clear_color_state;
    i915->pipe.set_constant_buffer = i915_set_constant_buffer;
diff --git a/src/mesa/pipe/i915simple/i915_state_dynamic.c b/src/mesa/pipe/i915simple/i915_state_dynamic.c
index e648357754f..49a30fac115 100644
--- a/src/mesa/pipe/i915simple/i915_state_dynamic.c
+++ b/src/mesa/pipe/i915simple/i915_state_dynamic.c
@@ -82,7 +82,7 @@ static void upload_MODES4( struct i915_context *i915 )
    {
       modes4 |= (_3DSTATE_MODES_4_CMD |
 		 ENABLE_LOGIC_OP_FUNC |
-		 LOGIC_OP_FUNC(i915_translate_logic_op(i915->blend.logicop_func)));
+		 LOGIC_OP_FUNC(i915_translate_logic_op(i915->blend->logicop_func)));
    }
    
    /* Always, so that we know when state is in-active: 
@@ -204,13 +204,13 @@ static void upload_IAB( struct i915_context *i915 )
    unsigned iab = 0;
 
    {
-      unsigned eqRGB  = i915->blend.rgb_func;
-      unsigned srcRGB = i915->blend.rgb_src_factor;
-      unsigned dstRGB = i915->blend.rgb_dst_factor;
+      unsigned eqRGB  = i915->blend->rgb_func;
+      unsigned srcRGB = i915->blend->rgb_src_factor;
+      unsigned dstRGB = i915->blend->rgb_dst_factor;
 
-      unsigned eqA    = i915->blend.alpha_func;
-      unsigned srcA   = i915->blend.alpha_src_factor;
-      unsigned dstA   = i915->blend.alpha_dst_factor;
+      unsigned eqA    = i915->blend->alpha_func;
+      unsigned srcA   = i915->blend->alpha_src_factor;
+      unsigned dstA   = i915->blend->alpha_dst_factor;
 
       /* Special handling for MIN/MAX filter modes handled at
        * state_tracker level.
diff --git a/src/mesa/pipe/i915simple/i915_state_immediate.c b/src/mesa/pipe/i915simple/i915_state_immediate.c
index 38a24733e12..aaca534f5ad 100644
--- a/src/mesa/pipe/i915simple/i915_state_immediate.c
+++ b/src/mesa/pipe/i915simple/i915_state_immediate.c
@@ -145,22 +145,22 @@ static void upload_S5( struct i915_context *i915 )
    }
 
    /* I915_NEW_BLEND */
-   if (i915->blend.logicop_enable) 
+   if (i915->blend->logicop_enable) 
       LIS5 |= S5_LOGICOP_ENABLE;
 
-   if (i915->blend.dither) 
+   if (i915->blend->dither) 
       LIS5 |= S5_COLOR_DITHER_ENABLE;
 
-   if ((i915->blend.colormask & PIPE_MASK_R) == 0)
+   if ((i915->blend->colormask & PIPE_MASK_R) == 0)
       LIS5 |= S5_WRITEDISABLE_RED;
 
-   if ((i915->blend.colormask & PIPE_MASK_G) == 0)
+   if ((i915->blend->colormask & PIPE_MASK_G) == 0)
       LIS5 |= S5_WRITEDISABLE_GREEN;
    
-   if ((i915->blend.colormask & PIPE_MASK_B) == 0)
+   if ((i915->blend->colormask & PIPE_MASK_B) == 0)
       LIS5 |= S5_WRITEDISABLE_BLUE;
 
-   if ((i915->blend.colormask & PIPE_MASK_A) == 0)
+   if ((i915->blend->colormask & PIPE_MASK_A) == 0)
       LIS5 |= S5_WRITEDISABLE_ALPHA;
 
 
@@ -205,11 +205,11 @@ static void upload_S6( struct i915_context *i915 )
 
    /* I915_NEW_BLEND
     */
-   if (i915->blend.blend_enable)
+   if (i915->blend->blend_enable)
    {
-      unsigned funcRGB = i915->blend.rgb_func;
-      unsigned srcRGB = i915->blend.rgb_src_factor;
-      unsigned dstRGB = i915->blend.rgb_dst_factor;
+      unsigned funcRGB = i915->blend->rgb_func;
+      unsigned srcRGB = i915->blend->rgb_src_factor;
+      unsigned dstRGB = i915->blend->rgb_dst_factor;
       
       LIS6 |= (S6_CBUF_BLEND_ENABLE |
 	       SRC_BLND_FACT(i915_translate_blend_factor(srcRGB)) |
diff --git a/src/mesa/pipe/p_context.h b/src/mesa/pipe/p_context.h
index ec5555c38e9..b9af69fc050 100644
--- a/src/mesa/pipe/p_context.h
+++ b/src/mesa/pipe/p_context.h
@@ -31,7 +31,7 @@
 #include "p_state.h"
 #include "p_compiler.h"
 
-
+struct pipe_state_cache;
 /**
  * Software pipeline rendering context.  Basically a collection of
  * state setting functions, plus VBO drawing entrypoint.
@@ -85,12 +85,16 @@ struct pipe_context {
    /*
     * State functions
     */
+   const struct pipe_blend_state * (*create_blend_state)(struct pipe_context *,
+                                                         const struct pipe_blend_state *);
+   void (*bind_blend_state)(struct pipe_context *,
+                            const struct pipe_blend_state *);
+   void (*delete_blend_state)(struct pipe_context *,
+                              const struct pipe_blend_state *);
+
    void (*set_alpha_test_state)( struct pipe_context *,
                                  const struct pipe_alpha_test_state * );
 
-   void (*set_blend_state)( struct pipe_context *,
-                            const struct pipe_blend_state * );
-
    void (*set_blend_color)( struct pipe_context *,
                             const struct pipe_blend_color * );
 
diff --git a/src/mesa/pipe/softpipe/sp_context.c b/src/mesa/pipe/softpipe/sp_context.c
index 92357808e29..b9c7013e9e1 100644
--- a/src/mesa/pipe/softpipe/sp_context.c
+++ b/src/mesa/pipe/softpipe/sp_context.c
@@ -250,9 +250,12 @@ struct pipe_context *softpipe_create( struct pipe_winsys *pipe_winsys,
    softpipe->pipe.max_texture_size = softpipe_max_texture_size;
 
    /* state setters */
+   softpipe->pipe.create_blend_state = softpipe_create_blend_state;
+   softpipe->pipe.bind_blend_state = softpipe_bind_blend_state;
+   softpipe->pipe.delete_blend_state = softpipe_delete_blend_state;
+
    softpipe->pipe.set_alpha_test_state = softpipe_set_alpha_test_state;
    softpipe->pipe.set_blend_color = softpipe_set_blend_color;
-   softpipe->pipe.set_blend_state = softpipe_set_blend_state;
    softpipe->pipe.set_clip_state = softpipe_set_clip_state;
    softpipe->pipe.set_clear_color_state = softpipe_set_clear_color_state;
    softpipe->pipe.set_constant_buffer = softpipe_set_constant_buffer;
diff --git a/src/mesa/pipe/softpipe/sp_context.h b/src/mesa/pipe/softpipe/sp_context.h
index 13d1143c890..7fecf2974ac 100644
--- a/src/mesa/pipe/softpipe/sp_context.h
+++ b/src/mesa/pipe/softpipe/sp_context.h
@@ -71,8 +71,9 @@ struct softpipe_context {
 
    /* The most recent drawing state as set by the driver:
     */
+   const struct pipe_blend_state *blend;
+
    struct pipe_alpha_test_state alpha_test;
-   struct pipe_blend_state blend;
    struct pipe_blend_color blend_color;
    struct pipe_clear_color_state clear_color;
    struct pipe_clip_state clip;
diff --git a/src/mesa/pipe/softpipe/sp_quad.c b/src/mesa/pipe/softpipe/sp_quad.c
index 0f0736479f2..2fcbea1f22e 100644
--- a/src/mesa/pipe/softpipe/sp_quad.c
+++ b/src/mesa/pipe/softpipe/sp_quad.c
@@ -11,12 +11,12 @@ sp_build_quad_pipeline(struct softpipe_context *sp)
 
    sp->quad.first = sp->quad.output;
 
-   if (sp->blend.colormask != 0xf) {
+   if (sp->blend->colormask != 0xf) {
       sp->quad.colormask->next = sp->quad.first;
       sp->quad.first = sp->quad.colormask;
    }
 
-   if (sp->blend.blend_enable) {
+   if (sp->blend->blend_enable) {
       sp->quad.blend->next = sp->quad.first;
       sp->quad.first = sp->quad.blend;
    }
diff --git a/src/mesa/pipe/softpipe/sp_quad_blend.c b/src/mesa/pipe/softpipe/sp_quad_blend.c
index e5335f3b19a..6c7135e53c5 100755
--- a/src/mesa/pipe/softpipe/sp_quad_blend.c
+++ b/src/mesa/pipe/softpipe/sp_quad_blend.c
@@ -111,7 +111,7 @@ blend_quad(struct quad_stage *qs, struct quad_header *quad)
    /*
     * Compute src/first term RGB
     */
-   switch (softpipe->blend.rgb_src_factor) {
+   switch (softpipe->blend->rgb_src_factor) {
    case PIPE_BLENDFACTOR_ONE:
       VEC4_COPY(source[0], quad->outputs.color[0]); /* R */
       VEC4_COPY(source[1], quad->outputs.color[1]); /* G */
@@ -253,7 +253,7 @@ blend_quad(struct quad_stage *qs, struct quad_header *quad)
    /*
     * Compute src/first term A
     */
-   switch (softpipe->blend.alpha_src_factor) {
+   switch (softpipe->blend->alpha_src_factor) {
    case PIPE_BLENDFACTOR_ONE:
       VEC4_COPY(source[3], quad->outputs.color[3]); /* A */
       break;
@@ -275,7 +275,7 @@ blend_quad(struct quad_stage *qs, struct quad_header *quad)
    /*
     * Compute dest/second term RGB
     */
-   switch (softpipe->blend.rgb_dst_factor) {
+   switch (softpipe->blend->rgb_dst_factor) {
    case PIPE_BLENDFACTOR_ONE:
       /* dest = dest * 1   NO-OP, leave dest as-is */
       break;
@@ -301,7 +301,7 @@ blend_quad(struct quad_stage *qs, struct quad_header *quad)
    /*
     * Compute dest/second term A
     */
-   switch (softpipe->blend.alpha_dst_factor) {
+   switch (softpipe->blend->alpha_dst_factor) {
    case PIPE_BLENDFACTOR_ONE:
       /* dest = dest * 1   NO-OP, leave dest as-is */
       break;
@@ -323,7 +323,7 @@ blend_quad(struct quad_stage *qs, struct quad_header *quad)
    /*
     * Combine RGB terms
     */
-   switch (softpipe->blend.rgb_func) {
+   switch (softpipe->blend->rgb_func) {
    case PIPE_BLEND_ADD:
       VEC4_ADD(quad->outputs.color[0], source[0], dest[0]); /* R */
       VEC4_ADD(quad->outputs.color[1], source[1], dest[1]); /* G */
@@ -356,7 +356,7 @@ blend_quad(struct quad_stage *qs, struct quad_header *quad)
    /*
     * Combine A terms
     */
-   switch (softpipe->blend.alpha_func) {
+   switch (softpipe->blend->alpha_func) {
    case PIPE_BLEND_ADD:
       VEC4_ADD(quad->outputs.color[3], source[3], dest[3]); /* A */
       break;
diff --git a/src/mesa/pipe/softpipe/sp_quad_colormask.c b/src/mesa/pipe/softpipe/sp_quad_colormask.c
index 7bb65bf8c80..c3e110532a1 100644
--- a/src/mesa/pipe/softpipe/sp_quad_colormask.c
+++ b/src/mesa/pipe/softpipe/sp_quad_colormask.c
@@ -49,19 +49,19 @@ colormask_quad(struct quad_stage *qs, struct quad_header *quad)
    sps->read_quad_f_swz(sps, quad->x0, quad->y0, dest);
 
    /* R */
-   if (!(softpipe->blend.colormask & PIPE_MASK_R))
+   if (!(softpipe->blend->colormask & PIPE_MASK_R))
        COPY_4V(quad->outputs.color[0], dest[0]);
 
    /* G */
-   if (!(softpipe->blend.colormask & PIPE_MASK_G))
+   if (!(softpipe->blend->colormask & PIPE_MASK_G))
        COPY_4V(quad->outputs.color[1], dest[1]);
 
    /* B */
-   if (!(softpipe->blend.colormask & PIPE_MASK_B))
+   if (!(softpipe->blend->colormask & PIPE_MASK_B))
        COPY_4V(quad->outputs.color[2], dest[2]);
 
    /* A */
-   if (!(softpipe->blend.colormask & PIPE_MASK_A))
+   if (!(softpipe->blend->colormask & PIPE_MASK_A))
        COPY_4V(quad->outputs.color[3], dest[3]);
 
    /* pass quad to next stage */
diff --git a/src/mesa/pipe/softpipe/sp_state.h b/src/mesa/pipe/softpipe/sp_state.h
index f40ebe3e2b8..e2b1a2a1641 100644
--- a/src/mesa/pipe/softpipe/sp_state.h
+++ b/src/mesa/pipe/softpipe/sp_state.h
@@ -33,6 +33,13 @@
 
 #include "pipe/p_state.h"
 
+const struct pipe_blend_state *
+softpipe_create_blend_state(struct pipe_context *,
+                            const struct pipe_blend_state *);
+void softpipe_bind_blend_state(struct pipe_context *,
+                               const struct pipe_blend_state *);
+void softpipe_delete_blend_state(struct pipe_context *,
+                                 const struct pipe_blend_state *);
 
 void softpipe_set_framebuffer_state( struct pipe_context *,
 			     const struct pipe_framebuffer_state * );
@@ -40,9 +47,6 @@ void softpipe_set_framebuffer_state( struct pipe_context *,
 void softpipe_set_alpha_test_state( struct pipe_context *,
                                     const struct pipe_alpha_test_state * );
 
-void softpipe_set_blend_state( struct pipe_context *,
-                               const struct pipe_blend_state * );
-
 void softpipe_set_blend_color( struct pipe_context *pipe,
                                const struct pipe_blend_color *blend_color );
 
diff --git a/src/mesa/pipe/softpipe/sp_state_blend.c b/src/mesa/pipe/softpipe/sp_state_blend.c
index b2e85d86cc0..57f2df79238 100644
--- a/src/mesa/pipe/softpipe/sp_state_blend.c
+++ b/src/mesa/pipe/softpipe/sp_state_blend.c
@@ -30,17 +30,32 @@
 #include "sp_context.h"
 #include "sp_state.h"
 
+const struct pipe_blend_state *
+softpipe_create_blend_state(struct pipe_context *pipe,
+                            const struct pipe_blend_state *blend)
+{
+   struct pipe_blend_state *new_blend = malloc(sizeof(struct pipe_blend_state));
+   memcpy(new_blend, blend, sizeof(struct pipe_blend_state));
+
+   return new_blend;
+}
 
-void softpipe_set_blend_state( struct pipe_context *pipe,
+void softpipe_bind_blend_state( struct pipe_context *pipe,
 			     const struct pipe_blend_state *blend )
 {
    struct softpipe_context *softpipe = softpipe_context(pipe);
 
-   softpipe->blend = *blend;
+   softpipe->blend = blend;
 
    softpipe->dirty |= SP_NEW_BLEND;
 }
 
+void softpipe_delete_blend_state(struct pipe_context *pipe,
+                                 const struct pipe_blend_state *blend )
+{
+   free(blend);
+}
+
 
 void softpipe_set_blend_color( struct pipe_context *pipe,
 			     const struct pipe_blend_color *blend_color )