234 lines
6.4 KiB
C
234 lines
6.4 KiB
C
#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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#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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static struct wlr_headless_output *headless_output_from_output(
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struct wlr_output *wlr_output) {
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assert(wlr_output_is_headless(wlr_output));
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return (struct wlr_headless_output *)wlr_output;
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}
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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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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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wlr_egl_unset_current(output->backend->egl);
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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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wlr_egl_unset_current(output->backend->egl);
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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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if (refresh <= 0) {
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refresh = HEADLESS_DEFAULT_REFRESH;
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}
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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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output->frame_delay = 1000000 / refresh;
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wlr_output_update_custom_mode(&output->wlr_output, width, height, refresh);
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return true;
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}
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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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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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if (wlr_output->pending.committed & WLR_OUTPUT_STATE_ENABLED) {
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wlr_log(WLR_DEBUG, "Cannot disable a headless output");
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return false;
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}
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if (wlr_output->pending.committed & WLR_OUTPUT_STATE_MODE) {
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assert(wlr_output->pending.mode_type == WLR_OUTPUT_STATE_MODE_CUSTOM);
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}
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return true;
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}
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static bool output_commit(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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if (!output_test(wlr_output)) {
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return false;
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}
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if (wlr_output->pending.committed & WLR_OUTPUT_STATE_MODE) {
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if (!output_set_custom_mode(wlr_output,
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wlr_output->pending.custom_mode.width,
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wlr_output->pending.custom_mode.height,
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wlr_output->pending.custom_mode.refresh)) {
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return false;
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}
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}
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if (wlr_output->pending.committed & WLR_OUTPUT_STATE_BUFFER) {
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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wlr_egl_unset_current(output->backend->egl);
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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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return true;
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}
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static void output_rollback_render(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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assert(wlr_egl_is_current(output->backend->egl));
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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wlr_egl_unset_current(output->backend->egl);
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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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destroy_fbo(output);
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free(output);
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}
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static const struct wlr_output_impl output_impl = {
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.destroy = output_destroy,
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.attach_render = output_attach_render,
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.commit = output_commit,
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.rollback_render = output_rollback_render,
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};
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bool wlr_output_is_headless(struct wlr_output *wlr_output) {
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return wlr_output->impl == &output_impl;
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}
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static int signal_frame(void *data) {
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struct wlr_headless_output *output = data;
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wlr_output_send_frame(&output->wlr_output);
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wl_event_source_timer_update(output->frame_timer, output->frame_delay);
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return 0;
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}
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struct wlr_output *wlr_headless_add_output(struct wlr_backend *wlr_backend,
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unsigned int width, unsigned int height) {
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struct wlr_headless_backend *backend =
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headless_backend_from_backend(wlr_backend);
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struct wlr_headless_output *output =
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calloc(1, sizeof(struct wlr_headless_output));
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if (output == NULL) {
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wlr_log(WLR_ERROR, "Failed to allocate wlr_headless_output");
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return NULL;
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}
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output->backend = backend;
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wlr_output_init(&output->wlr_output, &backend->backend, &output_impl,
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backend->display);
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struct wlr_output *wlr_output = &output->wlr_output;
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if (!create_fbo(output, width, height)) {
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goto error;
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}
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output_set_custom_mode(wlr_output, width, height, 0);
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strncpy(wlr_output->make, "headless", sizeof(wlr_output->make));
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strncpy(wlr_output->model, "headless", sizeof(wlr_output->model));
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snprintf(wlr_output->name, sizeof(wlr_output->name), "HEADLESS-%zd",
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++backend->last_output_num);
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char description[128];
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snprintf(description, sizeof(description),
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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 (!output_attach_render(wlr_output, NULL)) {
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goto error;
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}
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wlr_renderer_begin(backend->renderer, wlr_output->width, wlr_output->height);
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wlr_renderer_clear(backend->renderer, (float[]){ 1.0, 1.0, 1.0, 1.0 });
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wlr_renderer_end(backend->renderer);
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struct wl_event_loop *ev = wl_display_get_event_loop(backend->display);
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output->frame_timer = wl_event_loop_add_timer(ev, signal_frame, output);
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wl_list_insert(&backend->outputs, &output->link);
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if (backend->started) {
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wl_event_source_timer_update(output->frame_timer, output->frame_delay);
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wlr_output_update_enabled(wlr_output, true);
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wlr_signal_emit_safe(&backend->backend.events.new_output, wlr_output);
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}
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return wlr_output;
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error:
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wlr_output_destroy(&output->wlr_output);
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return NULL;
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}
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