From f2be08ae0e20b3da8ff684ffeb94412cc6a5a5a1 Mon Sep 17 00:00:00 2001
From: José Fonseca <jfonseca@vmware.com>
Date: Mon, 19 Oct 2009 11:53:22 +0100
Subject: llvmpipe: Allocate the blend color from the data store, and ensure
 it's aligned.

---
 src/gallium/drivers/llvmpipe/lp_setup.c         | 34 +++++++++++++++++--------
 src/gallium/drivers/llvmpipe/lp_setup_context.h | 28 ++++++++++++++++++--
 2 files changed, 50 insertions(+), 12 deletions(-)

diff --git a/src/gallium/drivers/llvmpipe/lp_setup.c b/src/gallium/drivers/llvmpipe/lp_setup.c
index 08dac459db..da5a68cd40 100644
--- a/src/gallium/drivers/llvmpipe/lp_setup.c
+++ b/src/gallium/drivers/llvmpipe/lp_setup.c
@@ -105,6 +105,7 @@ static void reset_context( struct setup_context *setup )
    pipe_buffer_reference(&setup->constants.current, NULL);
    setup->constants.stored_size = 0;
    setup->constants.stored_data = NULL;
+   setup->dirty = ~0;
 
    /* Free all but last binner command lists:
     */
@@ -453,20 +454,14 @@ void
 lp_setup_set_blend_color( struct setup_context *setup,
                           const struct pipe_blend_color *blend_color )
 {
-   unsigned i, j;
-
    SETUP_DEBUG("%s\n", __FUNCTION__);
 
-   if(!setup->fs.current.jit_context.blend_color)
-      setup->fs.current.jit_context.blend_color = align_malloc(4 * 16, 16);
+   assert(blend_color);
 
-   for (i = 0; i < 4; ++i) {
-      uint8_t c = float_to_ubyte(blend_color->color[i]);
-      for (j = 0; j < 16; ++j)
-         setup->fs.current.jit_context.blend_color[i*4 + j] = c;
+   if(memcmp(&setup->blend_color.current, blend_color, sizeof *blend_color) != 0) {
+      memcpy(&setup->blend_color.current, blend_color, sizeof *blend_color);
+      setup->dirty |= LP_SETUP_NEW_BLEND_COLOR;
    }
-
-   setup->dirty |= LP_SETUP_NEW_FS;
 }
 
 void
@@ -522,6 +517,25 @@ lp_setup_update_shader_state( struct setup_context *setup )
 
    assert(setup->fs.current.jit_function);
 
+   if(setup->dirty & LP_SETUP_NEW_BLEND_COLOR) {
+      uint8_t *stored;
+      unsigned i, j;
+
+      stored = get_data_aligned(&setup->data, 4 * 16, 16);
+
+      for (i = 0; i < 4; ++i) {
+         uint8_t c = float_to_ubyte(setup->blend_color.current.color[i]);
+         for (j = 0; j < 16; ++j)
+            stored[i*4 + j] = c;
+      }
+
+      setup->blend_color.stored = stored;
+
+      setup->fs.current.jit_context.blend_color = setup->blend_color.stored;
+      setup->dirty |= LP_SETUP_NEW_FS;
+   }
+
+
    if(setup->dirty & LP_SETUP_NEW_CONSTANTS) {
       struct pipe_buffer *buffer = setup->constants.current;
 
diff --git a/src/gallium/drivers/llvmpipe/lp_setup_context.h b/src/gallium/drivers/llvmpipe/lp_setup_context.h
index 82ec71f100..bcd3b9b7aa 100644
--- a/src/gallium/drivers/llvmpipe/lp_setup_context.h
+++ b/src/gallium/drivers/llvmpipe/lp_setup_context.h
@@ -43,8 +43,9 @@
 #define DATA_BLOCK_SIZE (16 * 1024 - sizeof(unsigned) - sizeof(void *))
    
 
-#define LP_SETUP_NEW_FS        0x01
-#define LP_SETUP_NEW_CONSTANTS 0x02
+#define LP_SETUP_NEW_FS          0x01
+#define LP_SETUP_NEW_CONSTANTS   0x02
+#define LP_SETUP_NEW_BLEND_COLOR 0x04
 
 
 /* switch to a non-pointer value for this:
@@ -124,6 +125,11 @@ struct setup_context {
       const void *stored_data;
    } constants;
 
+   struct {
+      struct pipe_blend_color current;
+      uint8_t *stored;
+   } blend_color;
+
    unsigned dirty;
 
    void (*point)( struct setup_context *,
@@ -163,6 +169,24 @@ static INLINE void *get_data( struct data_block_list *list,
    }
 }
 
+static INLINE void *get_data_aligned( struct data_block_list *list,
+                                      unsigned size,
+                                      unsigned alignment )
+{
+
+   if (list->tail->used + size + alignment - 1 > DATA_BLOCK_SIZE) {
+      lp_setup_new_data_block( list );
+   }
+
+   {
+      struct data_block *tail = list->tail;
+      ubyte *data = tail->data + tail->used;
+      unsigned offset = (((uintptr_t)data + alignment - 1) & ~(alignment - 1)) - (uintptr_t)data;
+      tail->used += offset + size;
+      return data + offset;
+   }
+}
+
 /* Add a command to a given bin.
  */
 static INLINE void bin_command( struct cmd_block_list *list,
-- 
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