render: constify struct wlr_buffer_pass_options

Let's not allow renderer implementations to mutate the passed in
options.

include/wlr/render/interface.h

@@ -49,7 +49,7 @@ struct wlr_renderer_impl {
 	struct wlr_texture *(*texture_from_buffer)(struct wlr_renderer *renderer,
 		struct wlr_buffer *buffer);
 	struct wlr_render_pass *(*begin_buffer_pass)(struct wlr_renderer *renderer,
-		struct wlr_buffer *buffer, struct wlr_buffer_pass_options *options);
+		struct wlr_buffer *buffer, const struct wlr_buffer_pass_options *options);
 	struct wlr_render_timer *(*render_timer_create)(struct wlr_renderer *renderer);
 };
 

include/wlr/render/wlr_renderer.h

@@ -177,7 +177,7 @@ struct wlr_buffer_pass_options {
  * render pass.
  */
 struct wlr_render_pass *wlr_renderer_begin_buffer_pass(struct wlr_renderer *renderer,
-	struct wlr_buffer *buffer, struct wlr_buffer_pass_options *options);
+	struct wlr_buffer *buffer, const struct wlr_buffer_pass_options *options);
 
 /**
  * Submit the render pass.

render/gles2/renderer.c

@@ -552,7 +552,7 @@ static void gles2_destroy(struct wlr_renderer *wlr_renderer) {
 }
 
 static struct wlr_render_pass *gles2_begin_buffer_pass(struct wlr_renderer *wlr_renderer,
-		struct wlr_buffer *wlr_buffer, struct wlr_buffer_pass_options *options) {
+		struct wlr_buffer *wlr_buffer, const struct wlr_buffer_pass_options *options) {
 	struct wlr_gles2_renderer *renderer = gles2_get_renderer(wlr_renderer);
 	if (!wlr_egl_make_current(renderer->egl)) {
 		return NULL;

render/pixman/renderer.c

@@ -493,7 +493,7 @@ static uint32_t pixman_get_render_buffer_caps(struct wlr_renderer *renderer) {
 }
 
 static struct wlr_render_pass *pixman_begin_buffer_pass(struct wlr_renderer *wlr_renderer,
-		struct wlr_buffer *wlr_buffer, struct wlr_buffer_pass_options *options) {
+		struct wlr_buffer *wlr_buffer, const struct wlr_buffer_pass_options *options) {
 	struct wlr_pixman_renderer *renderer = get_renderer(wlr_renderer);
 
 	struct wlr_pixman_buffer *buffer = get_buffer(renderer, wlr_buffer);

render/vulkan/renderer.c

@@ -1922,7 +1922,7 @@ static uint32_t vulkan_get_render_buffer_caps(struct wlr_renderer *wlr_renderer)
 }
 
 static struct wlr_render_pass *vulkan_begin_buffer_pass(struct wlr_renderer *wlr_renderer,
-		struct wlr_buffer *buffer, struct wlr_buffer_pass_options *options) {
+		struct wlr_buffer *buffer, const struct wlr_buffer_pass_options *options) {
 	struct wlr_vk_renderer *renderer = vulkan_get_renderer(wlr_renderer);
 
 	struct wlr_vk_render_buffer *render_buffer = get_render_buffer(renderer, buffer);

render/wlr_renderer.c

@@ -415,7 +415,7 @@ int wlr_renderer_get_drm_fd(struct wlr_renderer *r) {
 }
 
 struct wlr_render_pass *wlr_renderer_begin_buffer_pass(struct wlr_renderer *renderer,
-		struct wlr_buffer *buffer, struct wlr_buffer_pass_options *options) {
+		struct wlr_buffer *buffer, const struct wlr_buffer_pass_options *options) {
 	if (!renderer->impl->begin_buffer_pass) {
 		return begin_legacy_buffer_render_pass(renderer, buffer);
 	}