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render: egl: Add utility functions for saving/restoring context

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This commit is contained in:
Andri Yngvason 2020-06-02 21:49:44 +00:00 • committed by Simon Ser
parent e77c046cf9
commit 11b598fe33
2 changed files with 31 additions and 0 deletions
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19
include/wlr/render/egl.h
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@ -30,6 +30,13 @@
#include <wlr/render/dmabuf.h>
#include <wlr/render/drm_format_set.h>
struct wlr_egl_context {
EGLDisplay display;
EGLContext context;
EGLSurface draw_surface;
EGLSurface read_surface;
};
struct wlr_egl {
EGLenum platform;
EGLDisplay display;
@ -137,6 +144,18 @@ bool wlr_egl_unset_current(struct wlr_egl *egl);
bool wlr_egl_is_current(struct wlr_egl *egl);
/**
* Save the current EGL context to the structure provided in the argument.
*
* This includes display, context, draw surface and read surface.
*/
void wlr_egl_save_context(struct wlr_egl_context *context);
/**
* Restore EGL context that was previously saved using wlr_egl_save_current().
*/
bool wlr_egl_restore_context(struct wlr_egl_context *context);
bool wlr_egl_swap_buffers(struct wlr_egl *egl, EGLSurface surface,
pixman_region32_t *damage);

12
render/egl.c
View file

@ -411,6 +411,18 @@ bool wlr_egl_is_current(struct wlr_egl *egl) {
return eglGetCurrentContext() == egl->context;
}
void wlr_egl_save_context(struct wlr_egl_context *context) {
context->display = eglGetCurrentDisplay();
context->context = eglGetCurrentContext();
context->draw_surface = eglGetCurrentSurface(EGL_DRAW);
context->read_surface = eglGetCurrentSurface(EGL_READ);
}
bool wlr_egl_restore_context(struct wlr_egl_context *context) {
return eglMakeCurrent(context->display, context->draw_surface,
context->read_surface, context->context);
}
bool wlr_egl_swap_buffers(struct wlr_egl *egl, EGLSurface surface,
pixman_region32_t *damage) {
// Never block when swapping buffers on Wayland