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render/egl: introduce wlr_egl_unset_current

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This function can be called after wlr_egl_make_current to cleanup the
EGL context. This avoids having lingering EGL contexts that make things
work by chance.

Closes: https://github.com/swaywm/wlroots/issues/2197
master
Simon Ser 5 years ago committed by Drew DeVault
parent 781ed1ff02
commit 1edc42157b
8 changed files with 62 additions and 29 deletions
Show Stats Download Patch File Download Diff File

4
backend/drm/drm.c
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@ -556,14 +556,14 @@ static bool drm_connector_commit(struct wlr_output *output) {
}
}
wlr_egl_make_current(&drm->renderer.egl, EGL_NO_SURFACE, NULL);
wlr_egl_unset_current(&drm->renderer.egl);
return true;
}
static void drm_connector_rollback(struct wlr_output *output) {
struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
wlr_egl_make_current(&drm->renderer.egl, EGL_NO_SURFACE, NULL);
wlr_egl_unset_current(&drm->renderer.egl);
}
size_t drm_crtc_get_gamma_lut_size(struct wlr_drm_backend *drm,

15
backend/headless/output.c
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@ -35,6 +35,8 @@ static bool create_fbo(struct wlr_headless_output *output,
GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
wlr_egl_unset_current(output->backend->egl);
if (status != GL_FRAMEBUFFER_COMPLETE) {
wlr_log(WLR_ERROR, "Failed to create FBO");
return false;
@ -52,6 +54,9 @@ static void destroy_fbo(struct wlr_headless_output *output) {
glDeleteFramebuffers(1, &output->fbo);
glDeleteRenderbuffers(1, &output->rbo);
wlr_egl_unset_current(output->backend->egl);
output->fbo = 0;
output->rbo = 0;
}
@ -125,21 +130,23 @@ static bool output_commit(struct wlr_output *wlr_output) {
}
if (wlr_output->pending.committed & WLR_OUTPUT_STATE_BUFFER) {
glBindFramebuffer(GL_FRAMEBUFFER, 0);
wlr_egl_unset_current(output->backend->egl);
// Nothing needs to be done for FBOs
wlr_output_send_present(wlr_output, NULL);
}
wlr_egl_make_current(output->backend->egl, EGL_NO_SURFACE, NULL);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
return true;
}
static void output_rollback(struct wlr_output *wlr_output) {
struct wlr_headless_output *output =
headless_output_from_output(wlr_output);
wlr_egl_make_current(output->backend->egl, EGL_NO_SURFACE, NULL);
if (wlr_output->pending.committed & WLR_OUTPUT_STATE_BUFFER) {
glBindFramebuffer(GL_FRAMEBUFFER, 0);
wlr_egl_unset_current(output->backend->egl);
}
}
static void output_destroy(struct wlr_output *wlr_output) {

6
backend/wayland/output.c
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@ -300,7 +300,7 @@ static bool output_commit(struct wlr_output *wlr_output) {
}
}
wlr_egl_make_current(&output->backend->egl, EGL_NO_SURFACE, NULL);
wlr_egl_unset_current(&output->backend->egl);
return true;
}
@ -308,7 +308,7 @@ static bool output_commit(struct wlr_output *wlr_output) {
static void output_rollback(struct wlr_output *wlr_output) {
struct wlr_wl_output *output =
get_wl_output_from_output(wlr_output);
wlr_egl_make_current(&output->backend->egl, EGL_NO_SURFACE, NULL);
wlr_egl_unset_current(&output->backend->egl);
}
static bool output_set_cursor(struct wlr_output *wlr_output,
@ -377,6 +377,7 @@ static bool output_set_cursor(struct wlr_output *wlr_output,
wlr_egl_swap_buffers(&backend->egl, egl_surface, NULL);
wlr_egl_destroy_surface(&backend->egl, egl_surface);
wlr_egl_unset_current(&backend->egl);
} else {
wl_surface_attach(surface, NULL, 0, 0);
wl_surface_commit(surface);
@ -583,6 +584,7 @@ struct wlr_output *wlr_wl_output_create(struct wlr_backend *wlr_backend) {
NULL)) {
goto error;
}
wlr_egl_unset_current(&output->backend->egl);
wl_list_insert(&backend->outputs, &output->link);
wlr_output_update_enabled(wlr_output, true);

4
backend/x11/output.c
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@ -157,14 +157,14 @@ static bool output_commit(struct wlr_output *wlr_output) {
wlr_output_send_present(wlr_output, NULL);
}
wlr_egl_make_current(&x11->egl, EGL_NO_SURFACE, NULL);
wlr_egl_unset_current(&x11->egl);
return true;
}
static void output_rollback(struct wlr_output *wlr_output) {
struct wlr_x11_output *output = get_x11_output_from_output(wlr_output);
wlr_egl_make_current(&output->x11->egl, EGL_NO_SURFACE, NULL);
wlr_egl_unset_current(&output->x11->egl);
}
static const struct wlr_output_impl output_impl = {

9
include/wlr/render/egl.h
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@ -122,9 +122,18 @@ bool wlr_egl_export_image_to_dmabuf(struct wlr_egl *egl, EGLImageKHR image,
*/
bool wlr_egl_destroy_image(struct wlr_egl *egl, EGLImageKHR image);
/**
* Make the EGL context current. The provided surface will be made current
* unless EGL_NO_SURFACE.
*
* Callers are expected to clear the current context when they are done by
* calling wlr_egl_unset_current.
*/
bool wlr_egl_make_current(struct wlr_egl *egl, EGLSurface surface,
int *buffer_age);
bool wlr_egl_unset_current(struct wlr_egl *egl);
bool wlr_egl_is_current(struct wlr_egl *egl);
bool wlr_egl_swap_buffers(struct wlr_egl *egl, EGLSurface surface,

11
render/egl.c
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@ -387,6 +387,15 @@ bool wlr_egl_make_current(struct wlr_egl *egl, EGLSurface surface,
return true;
}
bool wlr_egl_unset_current(struct wlr_egl *egl) {
if (!eglMakeCurrent(egl->display, EGL_NO_SURFACE, EGL_NO_SURFACE,
EGL_NO_CONTEXT)) {
wlr_log(WLR_ERROR, "eglMakeCurrent failed");
return false;
}
return true;
}
bool wlr_egl_is_current(struct wlr_egl *egl) {
return eglGetCurrentContext() == egl->context;
}
@ -690,7 +699,7 @@ bool wlr_egl_destroy_surface(struct wlr_egl *egl, EGLSurface surface) {
// Reset the current EGL surface in case it's the one we're destroying,
// otherwise the next wlr_egl_make_current call will result in a
// use-after-free.
wlr_egl_make_current(egl, NULL, NULL);
wlr_egl_make_current(egl, EGL_NO_SURFACE, NULL);
}
return eglDestroySurface(egl->display, surface);
}

6
render/gles2/renderer.c
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@ -401,6 +401,8 @@ static void gles2_destroy(struct wlr_renderer *wlr_renderer) {
gles2_procs.glDebugMessageCallbackKHR(NULL, NULL);
}
wlr_egl_unset_current(renderer->egl);
free(renderer);
}
@ -670,6 +672,8 @@ struct wlr_renderer *wlr_gles2_renderer_create(struct wlr_egl *egl) {
POP_GLES2_DEBUG;
wlr_egl_unset_current(renderer->egl);
return &renderer->wlr_renderer;
error:
@ -686,6 +690,8 @@ error:
gles2_procs.glDebugMessageCallbackKHR(NULL, NULL);
}
wlr_egl_unset_current(renderer->egl);
free(renderer);
return NULL;
}

26
render/gles2/texture.c
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@ -29,9 +29,7 @@ struct wlr_gles2_texture *gles2_get_texture(
static struct wlr_gles2_texture *get_gles2_texture_in_context(
struct wlr_texture *wlr_texture) {
struct wlr_gles2_texture *texture = gles2_get_texture(wlr_texture);
if (!wlr_egl_is_current(texture->egl)) {
wlr_egl_make_current(texture->egl, EGL_NO_SURFACE, NULL);
}
return texture;
}
@ -49,6 +47,7 @@ static bool gles2_texture_write_pixels(struct wlr_texture *wlr_texture,
if (texture->target != GL_TEXTURE_2D) {
wlr_log(WLR_ERROR, "Cannot write pixels to immutable texture");
wlr_egl_unset_current(texture->egl);
return false;
}
@ -75,6 +74,8 @@ static bool gles2_texture_write_pixels(struct wlr_texture *wlr_texture,
glBindTexture(GL_TEXTURE_2D, 0);
POP_GLES2_DEBUG;
wlr_egl_unset_current(texture->egl);
return true;
}
@ -111,11 +112,8 @@ static void gles2_texture_destroy(struct wlr_texture *wlr_texture) {
return;
}
struct wlr_gles2_texture *texture = gles2_get_texture(wlr_texture);
if (!wlr_egl_is_current(texture->egl)) {
wlr_egl_make_current(texture->egl, EGL_NO_SURFACE, NULL);
}
struct wlr_gles2_texture *texture =
get_gles2_texture_in_context(wlr_texture);
PUSH_GLES2_DEBUG;
@ -124,6 +122,8 @@ static void gles2_texture_destroy(struct wlr_texture *wlr_texture) {
POP_GLES2_DEBUG;
wlr_egl_unset_current(texture->egl);
free(texture);
}
@ -137,9 +137,7 @@ static const struct wlr_texture_impl texture_impl = {
struct wlr_texture *wlr_gles2_texture_from_pixels(struct wlr_egl *egl,
enum wl_shm_format wl_fmt, uint32_t stride, uint32_t width,
uint32_t height, const void *data) {
if (!wlr_egl_is_current(egl)) {
wlr_egl_make_current(egl, EGL_NO_SURFACE, NULL);
}
const struct wlr_gles2_pixel_format *fmt = get_gles2_format_from_wl(wl_fmt);
if (fmt == NULL) {
@ -172,14 +170,14 @@ struct wlr_texture *wlr_gles2_texture_from_pixels(struct wlr_egl *egl,
glBindTexture(GL_TEXTURE_2D, 0);
POP_GLES2_DEBUG;
wlr_egl_unset_current(egl);
return &texture->wlr_texture;
}
struct wlr_texture *wlr_gles2_texture_from_wl_drm(struct wlr_egl *egl,
struct wl_resource *resource) {
if (!wlr_egl_is_current(egl)) {
wlr_egl_make_current(egl, EGL_NO_SURFACE, NULL);
}
if (!gles2_procs.glEGLImageTargetTexture2DOES) {
return NULL;
@ -235,14 +233,14 @@ struct wlr_texture *wlr_gles2_texture_from_wl_drm(struct wlr_egl *egl,
glBindTexture(GL_TEXTURE_EXTERNAL_OES, 0);
POP_GLES2_DEBUG;
wlr_egl_unset_current(egl);
return &texture->wlr_texture;
}
struct wlr_texture *wlr_gles2_texture_from_dmabuf(struct wlr_egl *egl,
struct wlr_dmabuf_attributes *attribs) {
if (!wlr_egl_is_current(egl)) {
wlr_egl_make_current(egl, EGL_NO_SURFACE, NULL);
}
if (!gles2_procs.glEGLImageTargetTexture2DOES) {
return NULL;
@ -297,6 +295,8 @@ struct wlr_texture *wlr_gles2_texture_from_dmabuf(struct wlr_egl *egl,
glBindTexture(GL_TEXTURE_EXTERNAL_OES, 0);
POP_GLES2_DEBUG;
wlr_egl_unset_current(egl);
return &texture->wlr_texture;
}

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