render/gles2: make wlr_renderer_begin take viewport size

This allows raw GL calls outside wlr_renderer to be removed.

backend/drm/drm.c

@@ -643,14 +643,13 @@ static bool wlr_drm_connector_set_cursor(struct wlr_output *output,
 		wlr_texture_upload_pixels(plane->wlr_tex, WL_SHM_FORMAT_ARGB8888,
 			stride, width, height, buf);
 
-		glViewport(0, 0, plane->surf.width, plane->surf.height);
-		glClearColor(0.0, 0.0, 0.0, 0.0);
-		glClear(GL_COLOR_BUFFER_BIT);
+		struct wlr_renderer *rend = plane->surf.renderer->wlr_rend;
+		wlr_renderer_begin(rend, plane->surf.width, plane->surf.height);
+		wlr_renderer_clear(rend, (float[]){ 0.0, 0.0, 0.0, 0.0 });
+		wlr_render_texture(rend, plane->wlr_tex, plane->matrix, 0, 0, 1.0f);
+		wlr_renderer_end(rend);
 
-		wlr_render_texture(plane->surf.renderer->wlr_rend, plane->wlr_tex,
-			plane->matrix, 0, 0, 1.0f);
-
-		glFinish();
+		// TODO: remove these raw GL calls
 		glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, bo_stride);
 		glReadPixels(0, 0, plane->surf.width, plane->surf.height, GL_BGRA_EXT,
 			GL_UNSIGNED_BYTE, bo_data);

backend/drm/renderer.c

@@ -2,7 +2,6 @@
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
 #include <gbm.h>
-#include <GLES2/gl2.h>
 #include <stdbool.h>
 #include <stdlib.h>
 #include <unistd.h>
@@ -107,9 +106,6 @@ void wlr_drm_surface_finish(struct wlr_drm_surface *surf) {
 		return;
 	}
 
-	eglMakeCurrent(surf->renderer->egl.display, EGL_NO_SURFACE, EGL_NO_SURFACE,
-		EGL_NO_CONTEXT);
-
 	if (surf->front) {
 		gbm_surface_release_buffer(surf->gbm, surf->front);
 	}
@@ -151,9 +147,10 @@ struct gbm_bo *wlr_drm_surface_get_front(struct wlr_drm_surface *surf) {
 	}
 
 	wlr_drm_surface_make_current(surf, NULL);
-	glViewport(0, 0, surf->width, surf->height);
-	glClearColor(0.0, 0.0, 0.0, 1.0);
-	glClear(GL_COLOR_BUFFER_BIT);
+	struct wlr_renderer *renderer = surf->renderer->wlr_rend;
+	wlr_renderer_begin(renderer, surf->width, surf->height);
+	wlr_renderer_clear(renderer, (float[]){ 0.0, 0.0, 0.0, 1.0 });
+	wlr_renderer_end(renderer);
 	return wlr_drm_surface_swap_buffers(surf, NULL);
 }
 
@@ -185,6 +182,8 @@ static struct wlr_texture *get_tex_for_bo(struct wlr_drm_renderer *renderer,
 		return tex->tex;
 	}
 
+	// TODO: use wlr_texture_upload_dmabuf instead
+
 	tex = malloc(sizeof(*tex));
 	if (!tex) {
 		wlr_log_errno(L_ERROR, "Allocation failed");
@@ -230,14 +229,14 @@ struct gbm_bo *wlr_drm_surface_mgpu_copy(struct wlr_drm_surface *dest,
 	struct wlr_texture *tex = get_tex_for_bo(dest->renderer, src);
 	assert(tex);
 
-	static const float color[] = {0.0, 0.0, 0.0, 1.0};
-
 	float mat[9];
 	wlr_matrix_projection(mat, 1, 1, WL_OUTPUT_TRANSFORM_FLIPPED_180);
 
-	glViewport(0, 0, dest->width, dest->height);
-	wlr_renderer_clear(dest->renderer->wlr_rend, color);
-	wlr_render_texture_with_matrix(dest->renderer->wlr_rend, tex, mat, 1.0f);
+	struct wlr_renderer *renderer = dest->renderer->wlr_rend;
+	wlr_renderer_begin(renderer, dest->width, dest->height);
+	wlr_renderer_clear(renderer, (float[]){ 0.0, 0.0, 0.0, 1.0 });
+	wlr_render_texture_with_matrix(renderer, tex, mat, 1.0f);
+	wlr_renderer_end(renderer);
 
 	return wlr_drm_surface_swap_buffers(dest, NULL);
 }

backend/headless/output.c

@@ -1,8 +1,8 @@
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
-#include <GLES2/gl2.h>
 #include <stdlib.h>
 #include <wlr/interfaces/wlr_output.h>
+#include <wlr/render/wlr_renderer.h>
 #include <wlr/util/log.h>
 #include "backend/headless.h"
 #include "util/signal.h"
@@ -120,16 +120,14 @@ struct wlr_output *wlr_headless_add_output(struct wlr_backend *wlr_backend,
 	snprintf(wlr_output->name, sizeof(wlr_output->name), "HEADLESS-%d",
 		wl_list_length(&backend->outputs) + 1);
 
-	if (!eglMakeCurrent(output->backend->egl.display,
-			output->egl_surface, output->egl_surface,
-			output->backend->egl.context)) {
-		wlr_log(L_ERROR, "eglMakeCurrent failed: %s", egl_error());
+	if (!wlr_egl_make_current(&output->backend->egl, output->egl_surface,
+			NULL)) {
 		goto error;
 	}
 
-	glViewport(0, 0, wlr_output->width, wlr_output->height);
-	glClearColor(1.0, 1.0, 1.0, 1.0);
-	glClear(GL_COLOR_BUFFER_BIT);
+	wlr_renderer_begin(backend->renderer, wlr_output->width, wlr_output->height);
+	wlr_renderer_clear(backend->renderer, (float[]){ 1.0, 1.0, 1.0, 1.0 });
+	wlr_renderer_end(backend->renderer);
 
 	struct wl_event_loop *ev = wl_display_get_event_loop(backend->display);
 	output->frame_timer = wl_event_loop_add_timer(ev, signal_frame, output);

backend/wayland/output.c

@@ -1,5 +1,4 @@
 #include <assert.h>
-#include <GLES2/gl2.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -9,6 +8,7 @@
 #include <unistd.h>
 #include <wayland-client.h>
 #include <wlr/interfaces/wlr_output.h>
+#include <wlr/render/wlr_renderer.h>
 #include <wlr/util/log.h>
 #include "backend/wayland.h"
 #include "util/signal.h"
@@ -313,27 +313,26 @@ struct wlr_output *wlr_wl_output_create(struct wlr_backend *_backend) {
 
 	output->egl_window = wl_egl_window_create(output->surface,
 			wlr_output->width, wlr_output->height);
-	output->egl_surface = wlr_egl_create_surface(&backend->egl, output->egl_window);
+	output->egl_surface = wlr_egl_create_surface(&backend->egl,
+		output->egl_window);
 
 	wl_display_roundtrip(output->backend->remote_display);
 
 	// start rendering loop per callbacks by rendering first frame
-	if (!eglMakeCurrent(output->backend->egl.display,
-		output->egl_surface, output->egl_surface,
-		output->backend->egl.context)) {
-		wlr_log(L_ERROR, "eglMakeCurrent failed: %s", egl_error());
+	if (!wlr_egl_make_current(&output->backend->egl, output->egl_surface,
+			NULL)) {
 		goto error;
 	}
 
-	glViewport(0, 0, wlr_output->width, wlr_output->height);
-	glClearColor(1.0, 1.0, 1.0, 1.0);
-	glClear(GL_COLOR_BUFFER_BIT);
+	wlr_renderer_begin(backend->renderer, wlr_output->width, wlr_output->height);
+	wlr_renderer_clear(backend->renderer, (float[]){ 1.0, 1.0, 1.0, 1.0 });
+	wlr_renderer_end(backend->renderer);
 
 	output->frame_callback = wl_surface_frame(output->surface);
 	wl_callback_add_listener(output->frame_callback, &frame_listener, output);
 
-	if (!eglSwapBuffers(output->backend->egl.display, output->egl_surface)) {
-		wlr_log(L_ERROR, "eglSwapBuffers failed: %s", egl_error());
+	if (!wlr_egl_swap_buffers(&output->backend->egl, output->egl_surface,
+			NULL)) {
 		goto error;
 	}
 

examples/output-layout.c

@@ -101,7 +101,7 @@ static void handle_output_frame(struct output_state *output,
 	struct wlr_output *wlr_output = output->output;
 
 	wlr_output_make_current(wlr_output, NULL);
-	wlr_renderer_begin(sample->renderer, wlr_output);
+	wlr_renderer_begin(sample->renderer, wlr_output->width, wlr_output->height);
 	wlr_renderer_clear(sample->renderer, (float[]){0.25f, 0.25f, 0.25f, 1});
 
 	animate_cat(sample, output->output);

examples/rotation.c

@@ -43,7 +43,7 @@ static void handle_output_frame(struct output_state *output, struct timespec *ts
 	wlr_output_effective_resolution(wlr_output, &width, &height);
 
 	wlr_output_make_current(wlr_output, NULL);
-	wlr_renderer_begin(sample->renderer, wlr_output);
+	wlr_renderer_begin(sample->renderer, wlr_output->width, wlr_output->height);
 	wlr_renderer_clear(sample->renderer, (float[]){0.25f, 0.25f, 0.25f, 1});
 
 	for (int y = -128 + (int)odata->y_offs; y < height; y += 128) {

examples/tablet.c

@@ -46,7 +46,7 @@ static void handle_output_frame(struct output_state *output, struct timespec *ts
 	wlr_output_effective_resolution(wlr_output, &width, &height);
 
 	wlr_output_make_current(wlr_output, NULL);
-	wlr_renderer_begin(sample->renderer, wlr_output);
+	wlr_renderer_begin(sample->renderer, wlr_output->width, wlr_output->height);
 	wlr_renderer_clear(sample->renderer, (float[]){0.25f, 0.25f, 0.25f, 1});
 
 	float matrix[9];

examples/touch.c

@@ -42,7 +42,7 @@ static void handle_output_frame(struct output_state *output, struct timespec *ts
 	wlr_output_effective_resolution(wlr_output, &width, &height);
 
 	wlr_output_make_current(wlr_output, NULL);
-	wlr_renderer_begin(sample->renderer, wlr_output);
+	wlr_renderer_begin(sample->renderer, wlr_output->width, wlr_output->height);
 	wlr_renderer_clear(sample->renderer, (float[]){0.25f, 0.25f, 0.25f, 1});
 
 	struct touch_point *p;

include/wlr/render/interface.h

@@ -18,7 +18,8 @@ struct wlr_renderer {
 };
 
 struct wlr_renderer_impl {
-	void (*begin)(struct wlr_renderer *renderer, struct wlr_output *output);
+	void (*begin)(struct wlr_renderer *renderer, uint32_t width,
+		uint32_t height);
 	void (*end)(struct wlr_renderer *renderer);
 	void (*clear)(struct wlr_renderer *renderer, const float color[static 4]);
 	void (*scissor)(struct wlr_renderer *renderer, struct wlr_box *box);

include/wlr/render/wlr_renderer.h

@@ -12,7 +12,7 @@ struct wlr_output;
 
 struct wlr_renderer;
 
-void wlr_renderer_begin(struct wlr_renderer *r, struct wlr_output *output);
+void wlr_renderer_begin(struct wlr_renderer *r, int width, int height);
 void wlr_renderer_end(struct wlr_renderer *r);
 void wlr_renderer_clear(struct wlr_renderer *r, const float color[static 4]);
 /**

render/gles2/renderer.c

@@ -26,13 +26,13 @@ static struct wlr_gles2_renderer *gles2_get_renderer(
 	return renderer;
 }
 
-static void gles2_begin(struct wlr_renderer *wlr_renderer,
-		struct wlr_output *output) {
+static void gles2_begin(struct wlr_renderer *wlr_renderer, uint32_t width,
+		uint32_t height) {
 	gles2_get_renderer(wlr_renderer);
 
 	GLES2_DEBUG_PUSH;
 
-	glViewport(0, 0, output->width, output->height);
+	glViewport(0, 0, width, height);
 
 	// enable transparency
 	glEnable(GL_BLEND);

render/wlr_renderer.c

@@ -17,8 +17,8 @@ void wlr_renderer_destroy(struct wlr_renderer *r) {
 	}
 }
 
-void wlr_renderer_begin(struct wlr_renderer *r, struct wlr_output *o) {
-	r->impl->begin(r, o);
+void wlr_renderer_begin(struct wlr_renderer *r, int width, int height) {
+	r->impl->begin(r, width, height);
 }
 
 void wlr_renderer_end(struct wlr_renderer *r) {

rootston/output.c

@@ -479,7 +479,7 @@ static void render_output(struct roots_output *output) {
 		goto damage_finish;
 	}
 
-	wlr_renderer_begin(renderer, wlr_output);
+	wlr_renderer_begin(renderer, wlr_output->width, wlr_output->height);
 
 	if (!pixman_region32_not_empty(&damage)) {
 		// Output isn't damaged but needs buffer swap

wlroots.syms

@@ -15,8 +15,8 @@ WLROOTS_0_0_0 {
         wlr_drm_get_connector_props;
         wlr_drm_get_crtc_props;
         wlr_drm_get_plane_props;
-        wlr_drm_get_prop;
         wlr_drm_get_prop_blob;
+        wlr_drm_get_prop;
         wlr_drm_plane_surfaces_init;
         wlr_drm_renderer_finish;
         wlr_drm_renderer_init;