backend/headless: use FBOs instead of pbuffers
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5dc3a9c754
commit
40513f1a0e
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@ -1,9 +1,10 @@
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#include <assert.h>
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#include <GLES2/gl2.h>
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#include <GLES2/gl2ext.h>
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#include <stdlib.h>
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#include <wlr/interfaces/wlr_input_device.h>
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#include <wlr/interfaces/wlr_output.h>
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#include <wlr/render/egl.h>
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#include <wlr/render/gles2.h>
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#include <wlr/util/log.h>
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#include "backend/headless.h"
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#include "util/signal.h"
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@ -100,9 +101,8 @@ struct wlr_backend *wlr_headless_backend_create(struct wl_display *display,
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wl_list_init(&backend->input_devices);
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static const EGLint config_attribs[] = {
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EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
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EGL_SURFACE_TYPE, 0,
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EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
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EGL_ALPHA_SIZE, 0,
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EGL_BLUE_SIZE, 1,
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EGL_GREEN_SIZE, 1,
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EGL_RED_SIZE, 1,
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@ -118,14 +118,31 @@ struct wlr_backend *wlr_headless_backend_create(struct wl_display *display,
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(EGLint*)config_attribs, 0);
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if (!backend->renderer) {
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wlr_log(WLR_ERROR, "Failed to create renderer");
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free(backend);
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return NULL;
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goto error_backend;
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}
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if (wlr_gles2_renderer_check_ext(backend->renderer, "GL_OES_rgb8_rgba8") ||
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wlr_gles2_renderer_check_ext(backend->renderer,
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"GL_OES_required_internalformat") ||
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wlr_gles2_renderer_check_ext(backend->renderer, "GL_ARM_rgba8")) {
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backend->internal_format = GL_RGBA8_OES;
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} else {
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wlr_log(WLR_INFO, "GL_RGBA8_OES not supported, "
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"falling back to GL_RGBA4 internal format "
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"(performance may be affected)");
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backend->internal_format = GL_RGBA4;
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}
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backend->display_destroy.notify = handle_display_destroy;
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wl_display_add_destroy_listener(display, &backend->display_destroy);
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return &backend->backend;
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error_renderer:
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wlr_renderer_destroy(backend->renderer);
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error_backend:
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free(backend);
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return NULL;
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}
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bool wlr_backend_is_headless(struct wlr_backend *backend) {
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@ -1,4 +1,6 @@
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#include <assert.h>
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#include <GLES2/gl2.h>
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#include <GLES2/gl2ext.h>
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#include <stdlib.h>
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#include <wlr/interfaces/wlr_output.h>
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#include <wlr/render/wlr_renderer.h>
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@ -12,33 +14,59 @@ static struct wlr_headless_output *headless_output_from_output(
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return (struct wlr_headless_output *)wlr_output;
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}
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static EGLSurface egl_create_surface(struct wlr_egl *egl, unsigned int width,
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unsigned int height) {
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EGLint attribs[] = {EGL_WIDTH, width, EGL_HEIGHT, height, EGL_NONE};
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EGLSurface surf = eglCreatePbufferSurface(egl->display, egl->config, attribs);
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if (surf == EGL_NO_SURFACE) {
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wlr_log(WLR_ERROR, "Failed to create EGL surface");
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return EGL_NO_SURFACE;
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static bool create_fbo(struct wlr_headless_output *output,
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unsigned int width, unsigned int height) {
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if (!wlr_egl_make_current(&output->backend->egl, EGL_NO_SURFACE, NULL)) {
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return false;
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}
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return surf;
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GLuint rbo;
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glGenRenderbuffers(1, &rbo);
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glBindRenderbuffer(GL_RENDERBUFFER, rbo);
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glRenderbufferStorage(GL_RENDERBUFFER, output->backend->internal_format,
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width, height);
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glBindRenderbuffer(GL_RENDERBUFFER, 0);
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GLuint fbo;
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glGenFramebuffers(1, &fbo);
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glBindFramebuffer(GL_FRAMEBUFFER, fbo);
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glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
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GL_RENDERBUFFER, rbo);
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GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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if (status != GL_FRAMEBUFFER_COMPLETE) {
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wlr_log(WLR_ERROR, "Failed to create FBO");
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return false;
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}
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output->fbo = fbo;
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output->rbo = rbo;
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return true;
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}
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static void destroy_fbo(struct wlr_headless_output *output) {
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if (!wlr_egl_make_current(&output->backend->egl, EGL_NO_SURFACE, NULL)) {
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return;
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}
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glDeleteFramebuffers(1, &output->fbo);
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glDeleteRenderbuffers(1, &output->rbo);
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output->fbo = 0;
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output->rbo = 0;
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}
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static bool output_set_custom_mode(struct wlr_output *wlr_output, int32_t width,
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int32_t height, int32_t refresh) {
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struct wlr_headless_output *output =
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headless_output_from_output(wlr_output);
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struct wlr_headless_backend *backend = output->backend;
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if (refresh <= 0) {
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refresh = HEADLESS_DEFAULT_REFRESH;
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}
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wlr_egl_destroy_surface(&backend->egl, output->egl_surface);
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output->egl_surface = egl_create_surface(&backend->egl, width, height);
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if (output->egl_surface == EGL_NO_SURFACE) {
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wlr_log(WLR_ERROR, "Failed to recreate EGL surface");
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destroy_fbo(output);
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if (!create_fbo(output, width, height)) {
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wlr_output_destroy(wlr_output);
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return false;
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}
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@ -53,8 +81,17 @@ static bool output_attach_render(struct wlr_output *wlr_output,
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int *buffer_age) {
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struct wlr_headless_output *output =
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headless_output_from_output(wlr_output);
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return wlr_egl_make_current(&output->backend->egl, output->egl_surface,
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buffer_age);
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if (!wlr_egl_make_current(&output->backend->egl, EGL_NO_SURFACE, NULL)) {
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return false;
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}
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glBindFramebuffer(GL_FRAMEBUFFER, output->fbo);
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if (buffer_age != NULL) {
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*buffer_age = 0; // We only have one buffer
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}
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return true;
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}
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static bool output_test(struct wlr_output *wlr_output) {
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@ -88,11 +125,12 @@ static bool output_commit(struct wlr_output *wlr_output) {
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}
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if (wlr_output->pending.committed & WLR_OUTPUT_STATE_BUFFER) {
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// Nothing needs to be done for pbuffers
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// Nothing needs to be done for FBOs
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wlr_output_send_present(wlr_output, NULL);
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}
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wlr_egl_make_current(&output->backend->egl, EGL_NO_SURFACE, NULL);
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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return true;
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}
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@ -101,17 +139,15 @@ static void output_rollback(struct wlr_output *wlr_output) {
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struct wlr_headless_output *output =
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headless_output_from_output(wlr_output);
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wlr_egl_make_current(&output->backend->egl, EGL_NO_SURFACE, NULL);
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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}
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static void output_destroy(struct wlr_output *wlr_output) {
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struct wlr_headless_output *output =
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headless_output_from_output(wlr_output);
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wl_list_remove(&output->link);
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wl_event_source_remove(output->frame_timer);
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wlr_egl_destroy_surface(&output->backend->egl, output->egl_surface);
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destroy_fbo(output);
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free(output);
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}
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@ -149,9 +185,7 @@ struct wlr_output *wlr_headless_add_output(struct wlr_backend *wlr_backend,
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backend->display);
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struct wlr_output *wlr_output = &output->wlr_output;
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output->egl_surface = egl_create_surface(&backend->egl, width, height);
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if (output->egl_surface == EGL_NO_SURFACE) {
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wlr_log(WLR_ERROR, "Failed to create EGL surface");
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if (!create_fbo(output, width, height)) {
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goto error;
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}
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@ -166,8 +200,7 @@ struct wlr_output *wlr_headless_add_output(struct wlr_backend *wlr_backend,
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"Headless output %zd", backend->last_output_num);
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wlr_output_set_description(wlr_output, description);
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if (!wlr_egl_make_current(&output->backend->egl, output->egl_surface,
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NULL)) {
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if (!output_attach_render(wlr_output, NULL)) {
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goto error;
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}
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@ -3,6 +3,7 @@
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#include <wlr/backend/headless.h>
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#include <wlr/backend/interface.h>
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#include <wlr/render/gles2.h>
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#define HEADLESS_DEFAULT_REFRESH (60 * 1000) // 60 Hz
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@ -16,6 +17,7 @@ struct wlr_headless_backend {
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struct wl_list input_devices;
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struct wl_listener display_destroy;
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bool started;
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GLenum internal_format;
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};
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struct wlr_headless_output {
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struct wlr_headless_backend *backend;
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struct wl_list link;
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void *egl_surface;
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GLuint fbo, rbo;
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struct wl_event_source *frame_timer;
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int frame_delay; // ms
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};
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