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framebuffer: track fb color mask like other fb state

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We should not be deciding whether we need to really update the GL color
mask state at the point where a new framebuffer has been pushed, we
should be waiting until we have really been asked to flush some
framebuffer state otherwise we may do redundant work if multiple
framebuffers are pushed/popped before something is really drawn.

This integrates the color mask state tracking with the design we have
for handling most of the other framebuffer state so we benefit from the
optimizations for minimizing the cost of _cogl_framebuffer_flush_state()

Reviewed-by: Neil Roberts <neil@linux.intel.com>
This commit is contained in:
Robert Bragg 2011-11-21 17:58:45 +00:00
parent 042dc7c8cd
commit cf4b228fc0
2 changed files with 41 additions and 19 deletions
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6
cogl/cogl-framebuffer-private.h
View file

@ -71,7 +71,8 @@ typedef enum _CoglFramebufferStateIndex
COGL_FRAMEBUFFER_STATE_INDEX_DITHER = 3,
COGL_FRAMEBUFFER_STATE_INDEX_MODELVIEW = 4,
COGL_FRAMEBUFFER_STATE_INDEX_PROJECTION = 5,
COGL_FRAMEBUFFER_STATE_INDEX_MAX = 6
COGL_FRAMEBUFFER_STATE_INDEX_COLOR_MASK = 6,
COGL_FRAMEBUFFER_STATE_INDEX_MAX = 7
} CoglFramebufferStateIndex;
typedef enum _CoglFramebufferState
@ -81,7 +82,8 @@ typedef enum _CoglFramebufferState
COGL_FRAMEBUFFER_STATE_CLIP = 1<<2,
COGL_FRAMEBUFFER_STATE_DITHER = 1<<3,
COGL_FRAMEBUFFER_STATE_MODELVIEW = 1<<4,
COGL_FRAMEBUFFER_STATE_PROJECTION = 1<<5
COGL_FRAMEBUFFER_STATE_PROJECTION = 1<<5,
COGL_FRAMEBUFFER_STATE_COLOR_MASK = 1<<6
} CoglFramebufferState;
#define COGL_FRAMEBUFFER_STATE_ALL ((1<<COGL_FRAMEBUFFER_STATE_INDEX_MAX) - 1)

54
cogl/cogl-framebuffer.c
View file

@ -1108,17 +1108,6 @@ notify_buffers_changed (CoglFramebuffer *old_draw_buffer,
if (old_draw_buffer && new_draw_buffer)
{
/* If the two draw framebuffers have a different color mask then
we need to ensure the logic ops are reflushed the next time
something is drawn */
if (cogl_framebuffer_get_color_mask (old_draw_buffer) !=
cogl_framebuffer_get_color_mask (new_draw_buffer))
{
ctx->current_pipeline_changes_since_flush |=
COGL_PIPELINE_STATE_LOGIC_OPS;
ctx->current_pipeline_age--;
}
/* If we're switching from onscreen to offscreen and the last
flush pipeline is using backface culling then we also need to
reflush the cull face state because the winding order of the
@ -1428,6 +1417,17 @@ _cogl_framebuffer_compare_projection_state (CoglFramebuffer *a,
return 0;
}
static unsigned long
_cogl_framebuffer_compare_color_mask_state (CoglFramebuffer *a,
CoglFramebuffer *b)
{
if (cogl_framebuffer_get_color_mask (a) !=
cogl_framebuffer_get_color_mask (b))
return COGL_FRAMEBUFFER_STATE_COLOR_MASK;
else
return 0;
}
static unsigned long
_cogl_framebuffer_compare (CoglFramebuffer *a,
CoglFramebuffer *b,
@ -1468,6 +1468,10 @@ _cogl_framebuffer_compare (CoglFramebuffer *a,
differences |=
_cogl_framebuffer_compare_projection_state (a, b);
break;
case COGL_FRAMEBUFFER_STATE_INDEX_COLOR_MASK:
differences |=
_cogl_framebuffer_compare_color_mask_state (a, b);
break;
default:
g_warn_if_reached ();
}
@ -1547,6 +1551,20 @@ _cogl_framebuffer_flush_projection_state (CoglFramebuffer *framebuffer)
COGL_MATRIX_PROJECTION);
}
static void
_cogl_framebuffer_flush_color_mask_state (CoglFramebuffer *framebuffer)
{
CoglContext *context = framebuffer->context;
/* The color mask state is really owned by a CoglPipeline so to
* ensure the color mask is updated the next time we draw something
* we need to make sure the logic ops for the pipeline are
* re-flushed... */
context->current_pipeline_changes_since_flush |=
COGL_PIPELINE_STATE_LOGIC_OPS;
context->current_pipeline_age--;
}
void
_cogl_framebuffer_flush_state (CoglFramebuffer *draw_buffer,
CoglFramebuffer *read_buffer,
@ -1647,6 +1665,9 @@ _cogl_framebuffer_flush_state (CoglFramebuffer *draw_buffer,
case COGL_FRAMEBUFFER_STATE_INDEX_PROJECTION:
_cogl_framebuffer_flush_projection_state (draw_buffer);
break;
case COGL_FRAMEBUFFER_STATE_INDEX_COLOR_MASK:
_cogl_framebuffer_flush_color_mask_state (draw_buffer);
break;
default:
g_warn_if_reached ();
}
@ -1699,15 +1720,14 @@ void
cogl_framebuffer_set_color_mask (CoglFramebuffer *framebuffer,
CoglColorMask color_mask)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* XXX: Currently color mask changes don't go through the journal */
_cogl_framebuffer_flush_journal (framebuffer);
cogl_flush (); /* XXX: Currently color mask changes don't go through the journal */
framebuffer->color_mask = color_mask;
/* Make sure the ColorMask is updated when the next primitive is drawn */
ctx->current_pipeline_changes_since_flush |=
COGL_PIPELINE_STATE_LOGIC_OPS;
ctx->current_pipeline_age--;
if (framebuffer->context->current_draw_buffer == framebuffer)
framebuffer->context->current_draw_buffer_changes |=
COGL_FRAMEBUFFER_STATE_COLOR_MASK;
}
gboolean