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cogl/egl: Use EGL_IMG_context_priority

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As long as the context_priority extension is available request a high
priority context, to help the compositor look fluid despite heavy GPU usage
from other applications at a regular priority.

This becomes sort of pointless if/when unredirection applies, should still
help with overview/workspace switch animations, or if the application is
not fullscreen.

Based on a similar patch by Daniel Stone to Weston.
This commit is contained in:
Carlos Garnacho 2018-03-01 23:52:57 +01:00
parent ff507273d2
commit 162d6d45a0
3 changed files with 31 additions and 3 deletions
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8
cogl/cogl/winsys/cogl-winsys-egl-feature-functions.h
View File

@ -147,3 +147,11 @@ COGL_WINSYS_FEATURE_BEGIN (surfaceless_context,
"surfaceless_context\0",
COGL_EGL_WINSYS_FEATURE_SURFACELESS_CONTEXT)
COGL_WINSYS_FEATURE_END ()
#ifdef EGL_IMG_context_priority
COGL_WINSYS_FEATURE_BEGIN (context_priority,
"IMG\0",
"context_priority\0",
COGL_EGL_WINSYS_FEATURE_CONTEXT_PRIORITY)
COGL_WINSYS_FEATURE_END ()
#endif

3
cogl/cogl/winsys/cogl-winsys-egl-private.h
View File

@ -105,7 +105,8 @@ typedef enum _CoglEGLWinsysFeature
COGL_EGL_WINSYS_FEATURE_CREATE_CONTEXT =1L<<3,
COGL_EGL_WINSYS_FEATURE_BUFFER_AGE =1L<<4,
COGL_EGL_WINSYS_FEATURE_FENCE_SYNC =1L<<5,
COGL_EGL_WINSYS_FEATURE_SURFACELESS_CONTEXT =1L<<6
COGL_EGL_WINSYS_FEATURE_SURFACELESS_CONTEXT =1L<<6,
COGL_EGL_WINSYS_FEATURE_CONTEXT_PRIORITY =1L<<7,
} CoglEGLWinsysFeature;
typedef struct _CoglRendererEGL

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

@ -345,7 +345,7 @@ try_create_context (CoglDisplay *display,
CoglRendererEGL *egl_renderer = renderer->winsys;
EGLDisplay edpy;
EGLConfig config;
EGLint attribs[9];
EGLint attribs[11];
EGLint cfg_attribs[MAX_EGL_CONFIG_ATTRIBS];
GError *config_error = NULL;
const char *error_message;
@ -394,7 +394,15 @@ try_create_context (CoglDisplay *display,
attribs[5] = EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR;
attribs[6] = EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR;
attribs[7] = EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR;
attribs[8] = EGL_NONE;
if (egl_renderer->private_features & COGL_EGL_WINSYS_FEATURE_CONTEXT_PRIORITY)
{
attribs[8] = EGL_CONTEXT_PRIORITY_LEVEL_IMG;
attribs[9] = EGL_CONTEXT_PRIORITY_HIGH_IMG;
attribs[10] = EGL_NONE;
}
else
attribs[8] = EGL_NONE;
}
else if (display->renderer->driver == COGL_DRIVER_GLES2)
{
@ -416,6 +424,17 @@ try_create_context (CoglDisplay *display,
goto fail;
}
if (egl_renderer->private_features & COGL_EGL_WINSYS_FEATURE_CONTEXT_PRIORITY)
{
EGLint value = EGL_CONTEXT_PRIORITY_MEDIUM_IMG;
eglQueryContext(egl_renderer->edpy, egl_display->egl_context,
EGL_CONTEXT_PRIORITY_LEVEL_IMG, &value);
if (value != EGL_CONTEXT_PRIORITY_HIGH_IMG)
g_warning ("Failed to obtain high priority context");
}
if (egl_renderer->platform_vtable->context_created &&
!egl_renderer->platform_vtable->context_created (display, error))
return FALSE;