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backend/headless: use FBOs instead of pbuffers

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master
Simon Ser 5 years ago committed by Drew DeVault
parent 5dc3a9c754
commit 40513f1a0e
3 changed files with 85 additions and 32 deletions
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27
backend/headless/backend.c
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@ -1,9 +1,10 @@
#include <assert.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <stdlib.h>
#include <wlr/interfaces/wlr_input_device.h>
#include <wlr/interfaces/wlr_output.h>
#include <wlr/render/egl.h>
#include <wlr/render/gles2.h>
#include <wlr/util/log.h>
#include "backend/headless.h"
#include "util/signal.h"
@ -100,9 +101,8 @@ struct wlr_backend *wlr_headless_backend_create(struct wl_display *display,
wl_list_init(&backend->input_devices);
static const EGLint config_attribs[] = {
EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
EGL_SURFACE_TYPE, 0,
EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
EGL_ALPHA_SIZE, 0,
EGL_BLUE_SIZE, 1,
EGL_GREEN_SIZE, 1,
EGL_RED_SIZE, 1,
@ -118,14 +118,31 @@ struct wlr_backend *wlr_headless_backend_create(struct wl_display *display,
(EGLint*)config_attribs, 0);
if (!backend->renderer) {
wlr_log(WLR_ERROR, "Failed to create renderer");
free(backend);
return NULL;
goto error_backend;
}
if (wlr_gles2_renderer_check_ext(backend->renderer, "GL_OES_rgb8_rgba8") ||
wlr_gles2_renderer_check_ext(backend->renderer,
"GL_OES_required_internalformat") ||
wlr_gles2_renderer_check_ext(backend->renderer, "GL_ARM_rgba8")) {
backend->internal_format = GL_RGBA8_OES;
} else {
wlr_log(WLR_INFO, "GL_RGBA8_OES not supported, "
"falling back to GL_RGBA4 internal format "
"(performance may be affected)");
backend->internal_format = GL_RGBA4;
}
backend->display_destroy.notify = handle_display_destroy;
wl_display_add_destroy_listener(display, &backend->display_destroy);
return &backend->backend;
error_renderer:
wlr_renderer_destroy(backend->renderer);
error_backend:
free(backend);
return NULL;
}
bool wlr_backend_is_headless(struct wlr_backend *backend) {

85
backend/headless/output.c
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@ -1,4 +1,6 @@
#include <assert.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <stdlib.h>
#include <wlr/interfaces/wlr_output.h>
#include <wlr/render/wlr_renderer.h>
@ -12,33 +14,59 @@ static struct wlr_headless_output *headless_output_from_output(
return (struct wlr_headless_output *)wlr_output;
}
static EGLSurface egl_create_surface(struct wlr_egl *egl, unsigned int width,
unsigned int height) {
EGLint attribs[] = {EGL_WIDTH, width, EGL_HEIGHT, height, EGL_NONE};
static bool create_fbo(struct wlr_headless_output *output,
unsigned int width, unsigned int height) {
if (!wlr_egl_make_current(&output->backend->egl, EGL_NO_SURFACE, NULL)) {
return false;
}
EGLSurface surf = eglCreatePbufferSurface(egl->display, egl->config, attribs);
if (surf == EGL_NO_SURFACE) {
wlr_log(WLR_ERROR, "Failed to create EGL surface");
return EGL_NO_SURFACE;
GLuint rbo;
glGenRenderbuffers(1, &rbo);
glBindRenderbuffer(GL_RENDERBUFFER, rbo);
glRenderbufferStorage(GL_RENDERBUFFER, output->backend->internal_format,
width, height);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
GLuint fbo;
glGenFramebuffers(1, &fbo);
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER, rbo);
GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
if (status != GL_FRAMEBUFFER_COMPLETE) {
wlr_log(WLR_ERROR, "Failed to create FBO");
return false;
}
return surf;
output->fbo = fbo;
output->rbo = rbo;
return true;
}
static void destroy_fbo(struct wlr_headless_output *output) {
if (!wlr_egl_make_current(&output->backend->egl, EGL_NO_SURFACE, NULL)) {
return;
}
glDeleteFramebuffers(1, &output->fbo);
glDeleteRenderbuffers(1, &output->rbo);
output->fbo = 0;
output->rbo = 0;
}
static bool output_set_custom_mode(struct wlr_output *wlr_output, int32_t width,
int32_t height, int32_t refresh) {
struct wlr_headless_output *output =
headless_output_from_output(wlr_output);
struct wlr_headless_backend *backend = output->backend;
if (refresh <= 0) {
refresh = HEADLESS_DEFAULT_REFRESH;
}
wlr_egl_destroy_surface(&backend->egl, output->egl_surface);
output->egl_surface = egl_create_surface(&backend->egl, width, height);
if (output->egl_surface == EGL_NO_SURFACE) {
wlr_log(WLR_ERROR, "Failed to recreate EGL surface");
destroy_fbo(output);
if (!create_fbo(output, width, height)) {
wlr_output_destroy(wlr_output);
return false;
}
@ -53,8 +81,17 @@ static bool output_attach_render(struct wlr_output *wlr_output,
int *buffer_age) {
struct wlr_headless_output *output =
headless_output_from_output(wlr_output);
return wlr_egl_make_current(&output->backend->egl, output->egl_surface,
buffer_age);
if (!wlr_egl_make_current(&output->backend->egl, EGL_NO_SURFACE, NULL)) {
return false;
}
glBindFramebuffer(GL_FRAMEBUFFER, output->fbo);
if (buffer_age != NULL) {
*buffer_age = 0; // We only have one buffer
}
return true;
}
static bool output_test(struct wlr_output *wlr_output) {
@ -88,11 +125,12 @@ static bool output_commit(struct wlr_output *wlr_output) {
}
if (wlr_output->pending.committed & WLR_OUTPUT_STATE_BUFFER) {
// Nothing needs to be done for pbuffers
// Nothing needs to be done for FBOs
wlr_output_send_present(wlr_output, NULL);
}
wlr_egl_make_current(&output->backend->egl, EGL_NO_SURFACE, NULL);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
return true;
}
@ -101,17 +139,15 @@ static void output_rollback(struct wlr_output *wlr_output) {
struct wlr_headless_output *output =
headless_output_from_output(wlr_output);
wlr_egl_make_current(&output->backend->egl, EGL_NO_SURFACE, NULL);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
static void output_destroy(struct wlr_output *wlr_output) {
struct wlr_headless_output *output =
headless_output_from_output(wlr_output);
wl_list_remove(&output->link);
wl_event_source_remove(output->frame_timer);
wlr_egl_destroy_surface(&output->backend->egl, output->egl_surface);
destroy_fbo(output);
free(output);
}
@ -149,9 +185,7 @@ struct wlr_output *wlr_headless_add_output(struct wlr_backend *wlr_backend,
backend->display);
struct wlr_output *wlr_output = &output->wlr_output;
output->egl_surface = egl_create_surface(&backend->egl, width, height);
if (output->egl_surface == EGL_NO_SURFACE) {
wlr_log(WLR_ERROR, "Failed to create EGL surface");
if (!create_fbo(output, width, height)) {
goto error;
}
@ -166,8 +200,7 @@ struct wlr_output *wlr_headless_add_output(struct wlr_backend *wlr_backend,
"Headless output %zd", backend->last_output_num);
wlr_output_set_description(wlr_output, description);
if (!wlr_egl_make_current(&output->backend->egl, output->egl_surface,
NULL)) {
if (!output_attach_render(wlr_output, NULL)) {
goto error;
}

5
include/backend/headless.h
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@ -3,6 +3,7 @@
#include <wlr/backend/headless.h>
#include <wlr/backend/interface.h>
#include <wlr/render/gles2.h>
#define HEADLESS_DEFAULT_REFRESH (60 * 1000) // 60 Hz
@ -16,6 +17,7 @@ struct wlr_headless_backend {
struct wl_list input_devices;
struct wl_listener display_destroy;
bool started;
GLenum internal_format;
};
struct wlr_headless_output {
@ -24,7 +26,8 @@ struct wlr_headless_output {
struct wlr_headless_backend *backend;
struct wl_list link;
void *egl_surface;
GLuint fbo, rbo;
struct wl_event_source *frame_timer;
int frame_delay; // ms
};

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