wlroots/backend/drm/renderer.c

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#include <assert.h>
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#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <gbm.h>
#include <GLES2/gl2.h>
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#include <stdbool.h>
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#include <stdlib.h>
#include <unistd.h>
#include <wayland-util.h>
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#include <wlr/render/egl.h>
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#include <wlr/render/gles2.h>
#include <wlr/render/wlr_renderer.h>
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#include <wlr/types/wlr_matrix.h>
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#include <wlr/util/log.h>
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#include "backend/drm/drm.h"
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#include "glapi.h"
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bool wlr_drm_renderer_init(struct wlr_drm_backend *drm,
struct wlr_drm_renderer *renderer) {
renderer->gbm = gbm_create_device(drm->fd);
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if (!renderer->gbm) {
wlr_log(L_ERROR, "Failed to create GBM device");
return false;
}
if (!wlr_egl_init(&renderer->egl, EGL_PLATFORM_GBM_MESA, renderer->gbm,
NULL, GBM_FORMAT_ARGB8888)) {
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goto error_gbm;
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}
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renderer->wlr_rend = wlr_gles2_renderer_create(&drm->backend);
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if (!renderer->wlr_rend) {
wlr_log(L_ERROR, "Failed to create WLR renderer");
goto error_egl;
}
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renderer->fd = drm->fd;
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return true;
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error_egl:
wlr_egl_finish(&renderer->egl);
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error_gbm:
gbm_device_destroy(renderer->gbm);
return false;
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}
void wlr_drm_renderer_finish(struct wlr_drm_renderer *renderer) {
if (!renderer) {
return;
}
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wlr_renderer_destroy(renderer->wlr_rend);
wlr_egl_finish(&renderer->egl);
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gbm_device_destroy(renderer->gbm);
}
bool wlr_drm_surface_init(struct wlr_drm_surface *surf,
struct wlr_drm_renderer *renderer, uint32_t width, uint32_t height,
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uint32_t format, uint32_t flags) {
if (surf->width == width && surf->height == height) {
return true;
}
surf->renderer = renderer;
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surf->width = width;
surf->height = height;
if (surf->gbm) {
if (surf->front) {
gbm_surface_release_buffer(surf->gbm, surf->front);
surf->front = NULL;
}
if (surf->back) {
gbm_surface_release_buffer(surf->gbm, surf->back);
surf->back = NULL;
}
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gbm_surface_destroy(surf->gbm);
}
if (surf->egl) {
eglDestroySurface(surf->renderer->egl.display, surf->egl);
}
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surf->gbm = gbm_surface_create(renderer->gbm, width, height,
format, GBM_BO_USE_RENDERING | flags);
if (!surf->gbm) {
wlr_log_errno(L_ERROR, "Failed to create GBM surface");
goto error_zero;
}
surf->egl = wlr_egl_create_surface(&renderer->egl, surf->gbm);
if (surf->egl == EGL_NO_SURFACE) {
wlr_log(L_ERROR, "Failed to create EGL surface");
goto error_gbm;
}
return true;
error_gbm:
gbm_surface_destroy(surf->gbm);
error_zero:
memset(surf, 0, sizeof(*surf));
return false;
}
void wlr_drm_surface_finish(struct wlr_drm_surface *surf) {
if (!surf || !surf->renderer) {
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return;
}
eglMakeCurrent(surf->renderer->egl.display, EGL_NO_SURFACE, EGL_NO_SURFACE,
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EGL_NO_CONTEXT);
if (surf->front) {
gbm_surface_release_buffer(surf->gbm, surf->front);
}
if (surf->back) {
gbm_surface_release_buffer(surf->gbm, surf->back);
}
if (surf->egl) {
eglDestroySurface(surf->renderer->egl.display, surf->egl);
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}
if (surf->gbm) {
gbm_surface_destroy(surf->gbm);
}
memset(surf, 0, sizeof(*surf));
}
bool wlr_drm_surface_make_current(struct wlr_drm_surface *surf,
int *buffer_damage) {
return wlr_egl_make_current(&surf->renderer->egl, surf->egl, buffer_damage);
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}
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struct gbm_bo *wlr_drm_surface_swap_buffers(struct wlr_drm_surface *surf,
pixman_region32_t *damage) {
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if (surf->front) {
gbm_surface_release_buffer(surf->gbm, surf->front);
}
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wlr_egl_swap_buffers(&surf->renderer->egl, surf->egl, damage);
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surf->front = surf->back;
surf->back = gbm_surface_lock_front_buffer(surf->gbm);
return surf->back;
}
struct gbm_bo *wlr_drm_surface_get_front(struct wlr_drm_surface *surf) {
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if (surf->front) {
return surf->front;
}
wlr_drm_surface_make_current(surf, NULL);
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glViewport(0, 0, surf->width, surf->height);
glClearColor(0.0, 0.0, 0.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
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return wlr_drm_surface_swap_buffers(surf, NULL);
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}
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void wlr_drm_surface_post(struct wlr_drm_surface *surf) {
if (surf->front) {
gbm_surface_release_buffer(surf->gbm, surf->front);
surf->front = NULL;
}
}
struct tex {
struct wlr_egl *egl;
EGLImageKHR img;
struct wlr_texture *tex;
};
static void free_eglimage(struct gbm_bo *bo, void *data) {
struct tex *tex = data;
wlr_egl_destroy_image(tex->egl, tex->img);
wlr_texture_destroy(tex->tex);
free(tex);
}
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static struct wlr_texture *get_tex_for_bo(struct wlr_drm_renderer *renderer,
struct gbm_bo *bo) {
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struct tex *tex = gbm_bo_get_user_data(bo);
if (tex) {
return tex->tex;
}
tex = malloc(sizeof(*tex));
if (!tex) {
wlr_log_errno(L_ERROR, "Allocation failed");
return NULL;
}
tex->egl = &renderer->egl;
int dmabuf_fd = gbm_bo_get_fd(bo);
uint32_t width = gbm_bo_get_width(bo);
uint32_t height = gbm_bo_get_height(bo);
EGLint attribs[] = {
EGL_WIDTH, width,
EGL_HEIGHT, height,
EGL_LINUX_DRM_FOURCC_EXT, gbm_bo_get_format(bo),
EGL_DMA_BUF_PLANE0_FD_EXT, dmabuf_fd,
EGL_DMA_BUF_PLANE0_OFFSET_EXT, gbm_bo_get_offset(bo, 0),
EGL_DMA_BUF_PLANE0_PITCH_EXT, gbm_bo_get_stride_for_plane(bo, 0),
EGL_IMAGE_PRESERVED_KHR, EGL_FALSE,
EGL_NONE,
};
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tex->img = eglCreateImageKHR(renderer->egl.display, EGL_NO_CONTEXT,
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EGL_LINUX_DMA_BUF_EXT, NULL, attribs);
if (!tex->img) {
wlr_log(L_ERROR, "Failed to create EGL image: %s", egl_error());
abort();
}
tex->tex = wlr_render_texture_create(renderer->wlr_rend);
wlr_texture_upload_eglimage(tex->tex, tex->img, width, height);
gbm_bo_set_user_data(bo, tex, free_eglimage);
return tex->tex;
}
struct gbm_bo *wlr_drm_surface_mgpu_copy(struct wlr_drm_surface *dest,
struct gbm_bo *src) {
wlr_drm_surface_make_current(dest, NULL);
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struct wlr_texture *tex = get_tex_for_bo(dest->renderer, src);
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assert(tex);
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static const float color[] = {0.0, 0.0, 0.0, 1.0};
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float mat[9];
wlr_matrix_projection(mat, 1, 1, WL_OUTPUT_TRANSFORM_FLIPPED_180);
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glViewport(0, 0, dest->width, dest->height);
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wlr_renderer_clear(dest->renderer->wlr_rend, color);
wlr_render_texture_with_matrix(dest->renderer->wlr_rend, tex, mat, 1.0f);
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return wlr_drm_surface_swap_buffers(dest, NULL);
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}
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bool wlr_drm_plane_surfaces_init(struct wlr_drm_plane *plane,
struct wlr_drm_backend *drm, int32_t width, uint32_t height,
uint32_t format) {
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if (!drm->parent) {
return wlr_drm_surface_init(&plane->surf, &drm->renderer, width, height,
format, GBM_BO_USE_SCANOUT);
}
if (!wlr_drm_surface_init(&plane->surf, &drm->parent->renderer,
width, height, format, GBM_BO_USE_LINEAR)) {
return false;
}
if (!wlr_drm_surface_init(&plane->mgpu_surf, &drm->renderer,
width, height, format, GBM_BO_USE_SCANOUT)) {
wlr_drm_surface_finish(&plane->surf);
return false;
}
return true;
}