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[matrix-stack] Adds ctx->flushed_matrix_mode to cache the gl matrix mode

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This cache of the gl matrix mode lets us avoid repeat calls to glMatrixMode
in _cogl_matrix_stack_flush_to_gl when we have lots of sequential modelview
matrix modifications.
This commit is contained in:
Robert Bragg 2009-10-14 10:53:48 +01:00
parent 43f8032a7f
commit 01887460f6
3 changed files with 20 additions and 12 deletions
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1
cogl/cogl-context.c
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@ -65,6 +65,7 @@ cogl_create_context (void)
_context->indirect = gl_is_indirect;
_context->flushed_matrix_mode = COGL_MATRIX_MODELVIEW;
_context->texture_units = NULL;
_context->default_material = cogl_material_new ();

1
cogl/cogl-context.h
View File

@ -59,6 +59,7 @@ typedef struct
gboolean indirect;
CoglMatrixMode matrix_mode;
CoglMatrixMode flushed_matrix_mode;
CoglMatrixStack *projection_stack;
CoglMatrixStack *modelview_stack;

30
cogl/cogl-matrix-stack.c
View File

@ -385,26 +385,32 @@ _cogl_matrix_stack_flush_to_gl (CoglMatrixStack *stack,
CoglMatrixMode mode)
{
CoglMatrixState *state;
GLenum gl_mode;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
state = _cogl_matrix_stack_top (stack);
if (stack->flushed_state == state)
return;
switch (mode)
if (ctx->flushed_matrix_mode != mode)
{
case COGL_MATRIX_MODELVIEW:
gl_mode = GL_MODELVIEW;
break;
case COGL_MATRIX_PROJECTION:
gl_mode = GL_PROJECTION;
break;
case COGL_MATRIX_TEXTURE:
gl_mode = GL_TEXTURE;
break;
GLenum gl_mode;
switch (mode)
{
case COGL_MATRIX_MODELVIEW:
gl_mode = GL_MODELVIEW;
break;
case COGL_MATRIX_PROJECTION:
gl_mode = GL_PROJECTION;
break;
case COGL_MATRIX_TEXTURE:
gl_mode = GL_TEXTURE;
break;
}
GE (glMatrixMode (gl_mode));
ctx->flushed_matrix_mode = mode;
}
GE (glMatrixMode (gl_mode));
/* In theory it might help the GL implementation if we used our
* local analysis of the matrix and called Translate/Scale rather