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egl: support EGL_EXT_buffer_age

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This adds support for the EGL_EXT_buffer_age extension which is a
counterpart to the GLX_EXT_buffer_age extension.

Reviewed-by: Neil Roberts <neil@linux.intel.com>

(cherry picked from commit 92d869764c03d0bac6b51dac833510c22669ac4a)
This commit is contained in:
Robert Bragg 2013-01-22 21:21:33 +00:00
parent 860fb00fdc
commit d521b61a49
3 changed files with 31 additions and 1 deletions
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6
cogl/winsys/cogl-winsys-egl-feature-functions.h
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@ -94,4 +94,10 @@ COGL_WINSYS_FEATURE_BEGIN (create_context,
COGL_EGL_WINSYS_FEATURE_CREATE_CONTEXT)
COGL_WINSYS_FEATURE_END ()
COGL_WINSYS_FEATURE_BEGIN (buffer_age,
"EXT\0",
"buffer_age\0",
COGL_EGL_WINSYS_FEATURE_BUFFER_AGE)
COGL_WINSYS_FEATURE_END ()
#endif

3
cogl/winsys/cogl-winsys-egl-private.h
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@ -69,7 +69,8 @@ typedef enum _CoglEGLWinsysFeature
COGL_EGL_WINSYS_FEATURE_SWAP_REGION =1L<<0,
COGL_EGL_WINSYS_FEATURE_EGL_IMAGE_FROM_X11_PIXMAP =1L<<1,
COGL_EGL_WINSYS_FEATURE_EGL_IMAGE_FROM_WAYLAND_BUFFER =1L<<2,
COGL_EGL_WINSYS_FEATURE_CREATE_CONTEXT =1L<<3
COGL_EGL_WINSYS_FEATURE_CREATE_CONTEXT =1L<<3,
COGL_EGL_WINSYS_FEATURE_BUFFER_AGE =1L<<4
} CoglEGLWinsysFeature;
typedef struct _CoglRendererEGL

23
cogl/winsys/cogl-winsys-egl.c
View File

@ -689,6 +689,28 @@ _cogl_winsys_onscreen_bind (CoglOnscreen *onscreen)
bind_onscreen (onscreen);
}
#ifndef EGL_BUFFER_AGE_EXT
#define EGL_BUFFER_AGE_EXT 0x313D
#endif
static int
_cogl_winsys_onscreen_get_buffer_age (CoglOnscreen *onscreen)
{
CoglContext *context = COGL_FRAMEBUFFER (onscreen)->context;
CoglRenderer *renderer = context->display->renderer;
CoglRendererEGL *egl_renderer = renderer->winsys;
CoglOnscreenEGL *egl_onscreen = onscreen->winsys;
EGLSurface surface = egl_onscreen->egl_surface;
int age;
if (!(egl_renderer->private_features & COGL_EGL_WINSYS_FEATURE_BUFFER_AGE))
return 0;
eglQuerySurface (egl_renderer->edpy, surface, EGL_BUFFER_AGE_EXT, &age);
return age;
}
static void
_cogl_winsys_onscreen_swap_region (CoglOnscreen *onscreen,
const int *user_rectangles,
@ -848,6 +870,7 @@ static CoglWinsysVtable _cogl_winsys_vtable =
.onscreen_bind = _cogl_winsys_onscreen_bind,
.onscreen_swap_buffers = _cogl_winsys_onscreen_swap_buffers,
.onscreen_swap_region = _cogl_winsys_onscreen_swap_region,
.onscreen_get_buffer_age = _cogl_winsys_onscreen_get_buffer_age,
.onscreen_update_swap_throttled =
_cogl_winsys_onscreen_update_swap_throttled,