From 3d79cfaba1a09c0e0ce3e1933478977af77da8f2 Mon Sep 17 00:00:00 2001
From: Robert Bragg <robert@linux.intel.com>
Date: Wed, 17 Jun 2009 02:08:31 +0100
Subject: [PATCH] [cogl matrix] Adds ability to dirty state cached by the
 client matrix apis

To be able to load matrices to GL manually within Cogl we need a way to
dirty the state cached by the client matrix stack API.
---
 common/cogl-current-matrix.c | 15 +++++++++++++++
 common/cogl-current-matrix.h |  1 +
 common/cogl-matrix-stack.c   |  7 +++++++
 common/cogl-matrix-stack.h   |  1 +
 4 files changed, 24 insertions(+)

diff --git a/common/cogl-current-matrix.c b/common/cogl-current-matrix.c
index 6d069bc66..7c3bc57a3 100644
--- a/common/cogl-current-matrix.c
+++ b/common/cogl-current-matrix.c
@@ -354,6 +354,21 @@ _cogl_current_matrix_state_flush (void)
     }
 }
 
+void
+_cogl_current_matrix_state_dirty (void)
+{
+  _COGL_GET_CONTEXT (ctx, NO_RETVAL);
+
+  if (ctx->matrix_mode != COGL_MATRIX_MODELVIEW)
+    {
+      g_warning ("matrix state must be dirtied in MODELVIEW mode");
+      return;
+    }
+
+  if (ctx->modelview_stack)
+    _cogl_matrix_stack_dirty (ctx->modelview_stack);
+}
+
 void
 cogl_push_matrix (void)
 {
diff --git a/common/cogl-current-matrix.h b/common/cogl-current-matrix.h
index d1b1bdec7..876c72bbb 100644
--- a/common/cogl-current-matrix.h
+++ b/common/cogl-current-matrix.h
@@ -88,5 +88,6 @@ void _cogl_get_matrix                    (CoglMatrixMode    mode,
 void _cogl_current_matrix_state_init     (void);
 void _cogl_current_matrix_state_destroy  (void);
 void _cogl_current_matrix_state_flush    (void);
+void _cogl_current_matrix_state_dirty    (void);
 
 #endif /* __COGL_CURRENT_MATRIX_H */
diff --git a/common/cogl-matrix-stack.c b/common/cogl-matrix-stack.c
index 6ba909840..e395ee1c6 100644
--- a/common/cogl-matrix-stack.c
+++ b/common/cogl-matrix-stack.c
@@ -360,3 +360,10 @@ _cogl_matrix_stack_flush_to_gl (CoglMatrixStack *stack,
   if (gl_mode != GL_MODELVIEW)
     GE (glMatrixMode (GL_MODELVIEW));
 }
+
+void
+_cogl_matrix_stack_dirty (CoglMatrixStack *stack)
+{
+  stack->flushed_state = NULL;
+}
+
diff --git a/common/cogl-matrix-stack.h b/common/cogl-matrix-stack.h
index a766f4bbc..c2d0048f5 100644
--- a/common/cogl-matrix-stack.h
+++ b/common/cogl-matrix-stack.h
@@ -76,5 +76,6 @@ void             _cogl_matrix_stack_set           (CoglMatrixStack  *stack,
                                                    const CoglMatrix *matrix);
 void             _cogl_matrix_stack_flush_to_gl   (CoglMatrixStack  *stack,
                                                    GLenum            gl_mode);
+void             _cogl_matrix_stack_dirty         (CoglMatrixStack  *stack);
 
 #endif /* __COGL_MATRIX_STACK_H */