Backends indicate that they support this extension by returning
EGL_TRUE when native_display::get_param() is called with
NATIVE_PARAM_PRESENT_REGION.
native_present_control is extended to include the region that should
be presented. When the whole surface is to be presented, this region
will be a single rect containing the dimensions of the surface.
Signed-off-by: Fredrik Höglund <fred...@kde.org>
---
src/gallium/state_trackers/egl/common/egl_g3d.c | 5 +++
.../state_trackers/egl/common/egl_g3d_api.c | 31 ++++++++++++++++++-
src/gallium/state_trackers/egl/common/native.h | 12 +++++++-
3 files changed, 45 insertions(+), 3 deletions(-)
diff --git a/src/gallium/state_trackers/egl/common/egl_g3d.c
b/src/gallium/state_trackers/egl/common/egl_g3d.c
index 182ce68..feebfaf 100644
--- a/src/gallium/state_trackers/egl/common/egl_g3d.c
+++ b/src/gallium/state_trackers/egl/common/egl_g3d.c
@@ -606,6 +606,11 @@ egl_g3d_initialize(_EGLDriver *drv, _EGLDisplay *dpy)
dpy->Extensions.WL_bind_wayland_display = EGL_TRUE;
#endif
+#ifdef EGL_NOK_swap_region
+ if (gdpy->native->get_param(gdpy->native, NATIVE_PARAM_PRESENT_REGION))
+ dpy->Extensions.NOK_swap_region = EGL_TRUE;
+#endif
+
if (egl_g3d_add_configs(drv, dpy, 1) == 1) {
_eglError(EGL_NOT_INITIALIZED, "eglInitialize(unable to add configs)");
goto fail;
diff --git a/src/gallium/state_trackers/egl/common/egl_g3d_api.c
b/src/gallium/state_trackers/egl/common/egl_g3d_api.c
index 911540e..e8f2abc 100644
--- a/src/gallium/state_trackers/egl/common/egl_g3d_api.c
+++ b/src/gallium/state_trackers/egl/common/egl_g3d_api.c
@@ -546,7 +546,8 @@ egl_g3d_make_current(_EGLDriver *drv, _EGLDisplay *dpy,
}
static EGLBoolean
-egl_g3d_swap_buffers(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf)
+swap_buffers(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf,
+ EGLint num_rects, const EGLint *rects, EGLBoolean preserve)
{
struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
_EGLContext *ctx = _eglGetCurrentContext();
@@ -572,14 +573,36 @@ egl_g3d_swap_buffers(_EGLDriver *drv, _EGLDisplay *dpy,
_EGLSurface *surf)
memset(&ctrl, 0, sizeof(ctrl));
ctrl.natt = NATIVE_ATTACHMENT_BACK_LEFT;
- ctrl.preserve = (gsurf->base.SwapBehavior == EGL_BUFFER_PRESERVED);
+ ctrl.preserve = preserve;
ctrl.swap_interval = gsurf->base.SwapInterval;
ctrl.premultiplied_alpha = (gsurf->base.VGAlphaFormat ==
EGL_VG_ALPHA_FORMAT_PRE);
+ ctrl.num_rects = num_rects;
+ ctrl.rects = rects;
return gsurf->native->present(gsurf->native, &ctrl);
}
static EGLBoolean
+egl_g3d_swap_buffers(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf)
+{
+ struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
+ const EGLint rect[4] = { 0, 0, gsurf->base.Width, gsurf->base.Height };
+
+ return swap_buffers(drv, dpy, surf, 1, rect,
+ (gsurf->base.SwapBehavior == EGL_BUFFER_PRESERVED));
+}
+
+#ifdef EGL_NOK_swap_region
+static EGLBoolean
+egl_g3d_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface
*surf,
+ EGLint num_rects, const EGLint *rects)
+{
+ /* Note: y=0=top */
+ return swap_buffers(drv, dpy, surf, num_rects, rects, EGL_TRUE);
+}
+#endif /* EGL_NOK_swap_region */
+
+static EGLBoolean
egl_g3d_copy_buffers(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf,
EGLNativePixmapType target)
{
@@ -867,4 +890,8 @@ egl_g3d_init_driver_api(_EGLDriver *drv)
drv->API.CreateScreenSurfaceMESA = egl_g3d_create_screen_surface;
drv->API.ShowScreenSurfaceMESA = egl_g3d_show_screen_surface;
#endif
+
+#ifdef EGL_NOK_swap_region
+ drv->API.SwapBuffersRegionNOK = egl_g3d_swap_buffers_region;
+#endif
}
diff --git a/src/gallium/state_trackers/egl/common/native.h
b/src/gallium/state_trackers/egl/common/native.h
index ee24c22..f1e067e 100644
--- a/src/gallium/state_trackers/egl/common/native.h
+++ b/src/gallium/state_trackers/egl/common/native.h
@@ -81,7 +81,13 @@ enum native_param_type {
* EGL_ALPHA_SIZE. EGL_VG_ALPHA_FORMAT attribute of a surface will affect
* how the surface is presented.
*/
- NATIVE_PARAM_PREMULTIPLIED_ALPHA
+ NATIVE_PARAM_PREMULTIPLIED_ALPHA,
+
+ /**
+ * Return TRUE if native_surface::present supports presenting a partial
+ * surface.
+ */
+ NATIVE_PARAM_PRESENT_REGION
};
/**
@@ -99,6 +105,10 @@ struct native_present_control {
/**< pixels use premultiplied alpha */
boolean premultiplied_alpha;
+
+ /**< the region to present. y=0=top */
+ int num_rects;
+ const int *rects; /* x, y, width, height */
};
struct native_surface {
--
1.7.7.3
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