127 lines
2.9 KiB
C
127 lines
2.9 KiB
C
#include <stdbool.h>
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#include <gbm.h>
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#include <GLES2/gl2.h>
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#include <EGL/egl.h>
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#include <EGL/eglext.h>
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#include <wlr/egl.h>
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#include <wlr/util/log.h>
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#include "backend/drm/drm.h"
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bool wlr_drm_renderer_init(struct wlr_drm_renderer *renderer, int fd) {
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renderer->gbm = gbm_create_device(fd);
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if (!renderer->gbm) {
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wlr_log(L_ERROR, "Failed to create GBM device");
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return false;
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}
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if (!wlr_egl_init(&renderer->egl, EGL_PLATFORM_GBM_MESA,
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GBM_FORMAT_ARGB8888, renderer->gbm)) {
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gbm_device_destroy(renderer->gbm);
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return false;
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}
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renderer->fd = fd;
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return true;
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}
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void wlr_drm_renderer_finish(struct wlr_drm_renderer *renderer) {
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if (!renderer) {
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return;
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}
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wlr_egl_free(&renderer->egl);
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gbm_device_destroy(renderer->gbm);
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}
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bool wlr_drm_surface_init(struct wlr_drm_renderer *renderer,
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struct wlr_drm_surface *surf, uint32_t width, uint32_t height,
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uint32_t format, uint32_t flags) {
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if (surf->width == width && surf->height == height) {
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return true;
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}
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surf->width = width;
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surf->height = height;
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surf->gbm = gbm_surface_create(renderer->gbm, width, height,
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format, GBM_BO_USE_RENDERING | flags);
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if (!surf->gbm) {
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wlr_log_errno(L_ERROR, "Failed to create GBM surface");
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goto error_zero;
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}
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surf->egl = wlr_egl_create_surface(&renderer->egl, surf->gbm);
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if (surf->egl == EGL_NO_SURFACE) {
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wlr_log(L_ERROR, "Failed to create EGL surface");
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goto error_gbm;
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}
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return true;
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error_gbm:
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gbm_surface_destroy(surf->gbm);
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error_zero:
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memset(surf, 0, sizeof(*surf));
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return false;
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}
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void wlr_drm_surface_finish(struct wlr_drm_renderer *renderer,
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struct wlr_drm_surface *surf) {
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if (!renderer || !surf || !surf->gbm) {
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return;
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}
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eglMakeCurrent(renderer->egl.display, EGL_NO_SURFACE, EGL_NO_SURFACE,
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EGL_NO_CONTEXT);
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if (surf->front) {
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gbm_surface_release_buffer(surf->gbm, surf->front);
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}
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if (surf->back) {
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gbm_surface_release_buffer(surf->gbm, surf->back);
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}
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if (surf->egl) {
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eglDestroySurface(renderer->egl.display, surf->egl);
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}
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if (surf->gbm) {
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gbm_surface_destroy(surf->gbm);
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}
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memset(surf, 0, sizeof(*surf));
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}
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void wlr_drm_surface_make_current(struct wlr_drm_renderer *renderer,
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struct wlr_drm_surface *surf) {
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eglMakeCurrent(renderer->egl.display, surf->egl, surf->egl,
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renderer->egl.context);
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}
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struct gbm_bo *wlr_drm_surface_swap_buffers(struct wlr_drm_renderer *renderer,
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struct wlr_drm_surface *surf) {
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if (surf->front) {
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gbm_surface_release_buffer(surf->gbm, surf->front);
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}
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eglSwapBuffers(renderer->egl.display, surf->egl);
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surf->front = surf->back;
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surf->back = gbm_surface_lock_front_buffer(surf->gbm);
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return surf->back;
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}
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struct gbm_bo *wlr_drm_surface_get_front(struct wlr_drm_renderer *renderer,
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struct wlr_drm_surface *surf) {
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if (surf->front) {
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return surf->front;
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}
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wlr_drm_surface_make_current(renderer, surf);
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glViewport(0, 0, surf->width, surf->height);
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glClearColor(0.0, 0.0, 0.0, 1.0);
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glClear(GL_COLOR_BUFFER_BIT);
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return wlr_drm_surface_swap_buffers(renderer, surf);
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}
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