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render/gles2: restore EGL context after texture operations

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It can be surprising and unexpected that texture operations (such as
texture upload and import) change the current EGL context, especially
when it's done under-the-hood by wlroots in response to wl_surface
requests.

To prevent surprises, save and restore the previous EGL context.
This commit is contained in:
Simon Ser 2021-01-14 15:02:19 +01:00
parent cc56b4f073
commit 642b349e94
1 changed files with 43 additions and 29 deletions
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72
render/gles2/texture.c
View file

@ -26,13 +26,6 @@ struct wlr_gles2_texture *gles2_get_texture(
return (struct wlr_gles2_texture *)wlr_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);
wlr_egl_make_current(texture->renderer->egl);
return texture;
}
static bool gles2_texture_is_opaque(struct wlr_texture *wlr_texture) {
struct wlr_gles2_texture *texture = gles2_get_texture(wlr_texture);
return !texture->has_alpha;
@ -42,12 +35,10 @@ static bool gles2_texture_write_pixels(struct wlr_texture *wlr_texture,
uint32_t stride, uint32_t width, uint32_t height,
uint32_t src_x, uint32_t src_y, uint32_t dst_x, uint32_t dst_y,
const void *data) {
struct wlr_gles2_texture *texture =
get_gles2_texture_in_context(wlr_texture);
struct wlr_gles2_texture *texture = gles2_get_texture(wlr_texture);
if (texture->target != GL_TEXTURE_2D) {
wlr_log(WLR_ERROR, "Cannot write pixels to immutable texture");
wlr_egl_unset_current(texture->renderer->egl);
return false;
}
@ -55,6 +46,10 @@ static bool gles2_texture_write_pixels(struct wlr_texture *wlr_texture,
get_gles2_format_from_wl(texture->wl_format);
assert(fmt);
struct wlr_egl_context prev_ctx;
wlr_egl_save_context(&prev_ctx);
wlr_egl_make_current(texture->renderer->egl);
push_gles2_debug(texture->renderer);
glBindTexture(GL_TEXTURE_2D, texture->tex);
@ -74,7 +69,8 @@ static bool gles2_texture_write_pixels(struct wlr_texture *wlr_texture,
pop_gles2_debug(texture->renderer);
wlr_egl_unset_current(texture->renderer->egl);
wlr_egl_restore_context(&prev_ctx);
return true;
}
@ -111,8 +107,11 @@ static void gles2_texture_destroy(struct wlr_texture *wlr_texture) {
return;
}
struct wlr_gles2_texture *texture =
get_gles2_texture_in_context(wlr_texture);
struct wlr_gles2_texture *texture = gles2_get_texture(wlr_texture);
struct wlr_egl_context prev_ctx;
wlr_egl_save_context(&prev_ctx);
wlr_egl_make_current(texture->renderer->egl);
push_gles2_debug(texture->renderer);
@ -121,7 +120,7 @@ static void gles2_texture_destroy(struct wlr_texture *wlr_texture) {
pop_gles2_debug(texture->renderer);
wlr_egl_unset_current(texture->renderer->egl);
wlr_egl_restore_context(&prev_ctx);
free(texture);
}
@ -138,8 +137,6 @@ struct wlr_texture *gles2_texture_from_pixels(struct wlr_renderer *wlr_renderer,
uint32_t height, const void *data) {
struct wlr_gles2_renderer *renderer = gles2_get_renderer(wlr_renderer);
wlr_egl_make_current(renderer->egl);
const struct wlr_gles2_pixel_format *fmt = get_gles2_format_from_wl(wl_fmt);
if (fmt == NULL) {
wlr_log(WLR_ERROR, "Unsupported pixel format %"PRIu32, wl_fmt);
@ -158,6 +155,10 @@ struct wlr_texture *gles2_texture_from_pixels(struct wlr_renderer *wlr_renderer,
texture->has_alpha = fmt->has_alpha;
texture->wl_format = fmt->wl_format;
struct wlr_egl_context prev_ctx;
wlr_egl_save_context(&prev_ctx);
wlr_egl_make_current(renderer->egl);
push_gles2_debug(renderer);
glGenTextures(1, &texture->tex);
@ -172,7 +173,8 @@ struct wlr_texture *gles2_texture_from_pixels(struct wlr_renderer *wlr_renderer,
pop_gles2_debug(renderer);
wlr_egl_unset_current(renderer->egl);
wlr_egl_restore_context(&prev_ctx);
return &texture->wlr_texture;
}
@ -180,12 +182,14 @@ struct wlr_texture *gles2_texture_from_wl_drm(struct wlr_renderer *wlr_renderer,
struct wl_resource *resource) {
struct wlr_gles2_renderer *renderer = gles2_get_renderer(wlr_renderer);
wlr_egl_make_current(renderer->egl);
if (!renderer->procs.glEGLImageTargetTexture2DOES) {
return NULL;
}
struct wlr_egl_context prev_ctx;
wlr_egl_save_context(&prev_ctx);
wlr_egl_make_current(renderer->egl);
EGLint fmt;
int width, height;
bool inverted_y;
@ -193,15 +197,14 @@ struct wlr_texture *gles2_texture_from_wl_drm(struct wlr_renderer *wlr_renderer,
&fmt, &width, &height, &inverted_y);
if (image == EGL_NO_IMAGE_KHR) {
wlr_log(WLR_ERROR, "Failed to create EGL image from wl_drm resource");
return NULL;
goto error_ctx;
}
struct wlr_gles2_texture *texture =
calloc(1, sizeof(struct wlr_gles2_texture));
if (texture == NULL) {
wlr_log(WLR_ERROR, "Allocation failed");
wlr_egl_destroy_image(renderer->egl, image);
return NULL;
goto error_image;
}
wlr_texture_init(&texture->wlr_texture, &texture_impl, width, height);
texture->renderer = renderer;
@ -220,9 +223,7 @@ struct wlr_texture *gles2_texture_from_wl_drm(struct wlr_renderer *wlr_renderer,
break;
default:
wlr_log(WLR_ERROR, "Invalid or unsupported EGL buffer format");
wlr_egl_destroy_image(renderer->egl, image);
free(texture);
return NULL;
goto error_texture;
}
texture->target = GL_TEXTURE_EXTERNAL_OES;
@ -237,16 +238,23 @@ struct wlr_texture *gles2_texture_from_wl_drm(struct wlr_renderer *wlr_renderer,
pop_gles2_debug(renderer);
wlr_egl_unset_current(renderer->egl);
wlr_egl_restore_context(&prev_ctx);
return &texture->wlr_texture;
error_texture:
free(texture);
error_image:
wlr_egl_destroy_image(renderer->egl, image);
error_ctx:
wlr_egl_restore_context(&prev_ctx);
return NULL;
}
struct wlr_texture *gles2_texture_from_dmabuf(struct wlr_renderer *wlr_renderer,
struct wlr_dmabuf_attributes *attribs) {
struct wlr_gles2_renderer *renderer = gles2_get_renderer(wlr_renderer);
wlr_egl_make_current(renderer->egl);
if (!renderer->procs.glEGLImageTargetTexture2DOES) {
return NULL;
}
@ -283,11 +291,16 @@ struct wlr_texture *gles2_texture_from_dmabuf(struct wlr_renderer *wlr_renderer,
texture->inverted_y =
(attribs->flags & WLR_DMABUF_ATTRIBUTES_FLAGS_Y_INVERT) != 0;
struct wlr_egl_context prev_ctx;
wlr_egl_save_context(&prev_ctx);
wlr_egl_make_current(renderer->egl);
bool external_only;
texture->image =
wlr_egl_create_image_from_dmabuf(renderer->egl, attribs, &external_only);
if (texture->image == EGL_NO_IMAGE_KHR) {
wlr_log(WLR_ERROR, "Failed to create EGL image from DMA-BUF");
wlr_egl_restore_context(&prev_ctx);
free(texture);
return NULL;
}
@ -303,7 +316,8 @@ struct wlr_texture *gles2_texture_from_dmabuf(struct wlr_renderer *wlr_renderer,
pop_gles2_debug(renderer);
wlr_egl_unset_current(renderer->egl);
wlr_egl_restore_context(&prev_ctx);
return &texture->wlr_texture;
}