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backend-wayland: Prepare for more renderers, reject no-op

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Turn the Pixman/GL if/else conditionals into switch cases to make it
easier to add support for other renderers in the future.

Also makes sure that weston --backend=wayland --renderer=noop fails
with an error message instead of segfaulting.

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
This commit is contained in:
Philipp Zabel 2023-06-19 08:25:58 +02:00 committed by Daniel Stone
parent ce113969e3
commit 1c262efd70
1 changed files with 37 additions and 14 deletions
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51
libweston/backend-wayland/wayland.c
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@ -693,15 +693,20 @@ wayland_output_disable(struct weston_output *base)
wayland_output_destroy_shm_buffers(output);
if (renderer->type == WESTON_RENDERER_PIXMAN) {
switch (renderer->type) {
case WESTON_RENDERER_PIXMAN:
renderer->pixman->output_destroy(&output->base);
break;
#ifdef ENABLE_EGL
} else {
case WESTON_RENDERER_GL:
weston_gl_borders_fini(&output->gl.borders, &output->base);
renderer->gl->output_destroy(&output->base);
wl_egl_window_destroy(output->gl.egl_window);
break;
#endif
default:
unreachable("invalid renderer");
}
wayland_backend_destroy_output_surface(output);
@ -1021,17 +1026,22 @@ wayland_output_switch_mode_finish(struct wayland_output *output)
{
struct weston_renderer *renderer = output->base.compositor->renderer;
if (renderer->type == WESTON_RENDERER_PIXMAN) {
switch (renderer->type) {
case WESTON_RENDERER_PIXMAN:
renderer->pixman->output_destroy(&output->base);
if (wayland_output_init_pixman_renderer(output) < 0)
return -1;
break;
#ifdef ENABLE_EGL
} else {
case WESTON_RENDERER_GL:
renderer->gl->output_destroy(&output->base);
wl_egl_window_destroy(output->gl.egl_window);
if (wayland_output_init_gl_renderer(output) < 0)
return -1;
break;
#endif
default:
unreachable("invalid renderer");
}
weston_output_schedule_repaint(&output->base);
@ -1245,6 +1255,7 @@ wayland_backend_create_output_surface(struct wayland_output *output)
static int
wayland_output_enable(struct weston_output *base)
{
const struct weston_renderer *renderer = base->compositor->renderer;
struct wayland_output *output = to_wayland_output(base);
struct wayland_backend *b;
enum mode_status mode_status;
@ -1269,18 +1280,23 @@ wayland_output_enable(struct weston_output *base)
if (ret < 0)
return -1;
if (base->compositor->renderer->type == WESTON_RENDERER_PIXMAN) {
switch (renderer->type) {
case WESTON_RENDERER_PIXMAN:
if (wayland_output_init_pixman_renderer(output) < 0)
goto err_output;
output->base.repaint = wayland_output_repaint_pixman;
break;
#ifdef ENABLE_EGL
} else {
case WESTON_RENDERER_GL:
if (wayland_output_init_gl_renderer(output) < 0)
goto err_output;
output->base.repaint = wayland_output_repaint_gl;
break;
#endif
default:
unreachable("invalid renderer");
}
output->base.start_repaint_loop = wayland_output_start_repaint_loop;
@ -2900,8 +2916,9 @@ wayland_backend_create(struct weston_compositor *compositor,
b->formats_count = ARRAY_LENGTH(wayland_formats);
b->formats = pixel_format_get_array(wayland_formats, b->formats_count);
if (renderer == WESTON_RENDERER_AUTO ||
renderer == WESTON_RENDERER_GL) {
switch (renderer) {
case WESTON_RENDERER_AUTO:
case WESTON_RENDERER_GL: {
const struct gl_renderer_display_options options = {
.egl_platform = EGL_PLATFORM_WAYLAND_KHR,
.egl_native_display = b->parent.wl_display,
@ -2914,22 +2931,28 @@ wayland_backend_create(struct weston_compositor *compositor,
WESTON_RENDERER_GL,
&options.base) < 0) {
weston_log("Failed to initialize the GL renderer");
if (renderer == WESTON_RENDERER_AUTO) {
weston_log_continue("; falling back to Pixman.\n");
renderer = WESTON_RENDERER_PIXMAN;
} else {
if (renderer == WESTON_RENDERER_GL) {
weston_log_continue("\n");
goto err_display;
}
renderer = WESTON_RENDERER_PIXMAN;
}
if (renderer != WESTON_RENDERER_PIXMAN)
break;
weston_log_continue("; falling back to Pixman.\n");
}
if (renderer == WESTON_RENDERER_PIXMAN) {
/* fallthrough */
case WESTON_RENDERER_PIXMAN:
if (weston_compositor_init_renderer(compositor,
WESTON_RENDERER_PIXMAN,
NULL) < 0) {
weston_log("Failed to initialize pixman renderer\n");
goto err_display;
}
break;
default:
weston_log("Unsupported renderer requested\n");
goto err_display;
}
b->base.shutdown = wayland_shutdown;