wlroots/backend/drm/renderer.c

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#include <assert.h>
#include <drm_fourcc.h>
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#include <gbm.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"
bool init_drm_renderer(struct wlr_drm_backend *drm,
struct wlr_drm_renderer *renderer, wlr_renderer_create_func_t create_renderer_func) {
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renderer->gbm = gbm_create_device(drm->fd);
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if (!renderer->gbm) {
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wlr_log(WLR_ERROR, "Failed to create GBM device");
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return false;
}
if (!create_renderer_func) {
create_renderer_func = wlr_renderer_autocreate;
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}
static EGLint config_attribs[] = {
EGL_RED_SIZE, 1,
EGL_GREEN_SIZE, 1,
EGL_BLUE_SIZE, 1,
EGL_ALPHA_SIZE, 1,
EGL_NONE,
};
renderer->gbm_format = GBM_FORMAT_ARGB8888;
renderer->wlr_rend = create_renderer_func(&renderer->egl,
EGL_PLATFORM_GBM_MESA, renderer->gbm,
config_attribs, renderer->gbm_format);
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if (!renderer->wlr_rend) {
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wlr_log(WLR_ERROR, "Failed to create EGL/WLR renderer");
goto error_gbm;
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}
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renderer->fd = drm->fd;
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return true;
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error_gbm:
gbm_device_destroy(renderer->gbm);
return false;
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}
void finish_drm_renderer(struct wlr_drm_renderer *renderer) {
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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 init_drm_surface(struct wlr_drm_surface *surf,
struct wlr_drm_renderer *renderer, uint32_t width, uint32_t height,
uint32_t format, struct wlr_drm_format_set *set, uint32_t flags) {
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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);
surf->gbm = NULL;
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}
wlr_egl_destroy_surface(&surf->renderer->egl, surf->egl);
if (!(flags & GBM_BO_USE_LINEAR) && set != NULL) {
const struct wlr_drm_format *drm_format =
wlr_drm_format_set_get(set, format);
if (drm_format != NULL) {
surf->gbm = gbm_surface_create_with_modifiers(renderer->gbm,
width, height, format, drm_format->modifiers, drm_format->len);
}
}
if (surf->gbm == NULL) {
surf->gbm = gbm_surface_create(renderer->gbm, width, height,
format, GBM_BO_USE_RENDERING | flags);
}
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if (!surf->gbm) {
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wlr_log_errno(WLR_ERROR, "Failed to create GBM surface");
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goto error_zero;
}
surf->egl = wlr_egl_create_surface(&renderer->egl, surf->gbm);
if (surf->egl == EGL_NO_SURFACE) {
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wlr_log(WLR_ERROR, "Failed to create EGL surface");
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goto error_gbm;
}
return true;
error_gbm:
gbm_surface_destroy(surf->gbm);
error_zero:
memset(surf, 0, sizeof(*surf));
return false;
}
void finish_drm_surface(struct wlr_drm_surface *surf) {
if (!surf || !surf->renderer) {
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return;
}
if (surf->front) {
gbm_surface_release_buffer(surf->gbm, surf->front);
}
if (surf->back) {
gbm_surface_release_buffer(surf->gbm, surf->back);
}
wlr_egl_destroy_surface(&surf->renderer->egl, surf->egl);
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if (surf->gbm) {
gbm_surface_destroy(surf->gbm);
}
memset(surf, 0, sizeof(*surf));
}
bool make_drm_surface_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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}
struct gbm_bo *swap_drm_surface_buffers(struct wlr_drm_surface *surf,
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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 *get_drm_surface_front(struct wlr_drm_surface *surf) {
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if (surf->front) {
return surf->front;
}
make_drm_surface_current(surf, NULL);
struct wlr_renderer *renderer = surf->renderer->wlr_rend;
wlr_renderer_begin(renderer, surf->width, surf->height);
wlr_renderer_clear(renderer, (float[]){ 0.0, 0.0, 0.0, 1.0 });
wlr_renderer_end(renderer);
return swap_drm_surface_buffers(surf, NULL);
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}
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void post_drm_surface(struct wlr_drm_surface *surf) {
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if (surf->front) {
gbm_surface_release_buffer(surf->gbm, surf->front);
surf->front = NULL;
}
}
struct gbm_bo *import_gbm_bo(struct wlr_drm_renderer *renderer,
struct wlr_dmabuf_attributes *attribs) {
if (attribs->modifier == DRM_FORMAT_MOD_INVALID && attribs->n_planes == 1
&& attribs->offset[0] == 0) {
struct gbm_import_fd_data data = {
.fd = attribs->fd[0],
.width = attribs->width,
.height = attribs->height,
.stride = attribs->stride[0],
.format = attribs->format,
};
return gbm_bo_import(renderer->gbm, GBM_BO_IMPORT_FD,
&data, GBM_BO_USE_SCANOUT);
} else {
struct gbm_import_fd_modifier_data data = {
.width = attribs->width,
.height = attribs->height,
.format = attribs->format,
.num_fds = attribs->n_planes,
.modifier = attribs->modifier,
};
if ((size_t)attribs->n_planes > sizeof(data.fds) / sizeof(data.fds[0])) {
return NULL;
}
for (size_t i = 0; i < (size_t)attribs->n_planes; ++i) {
data.fds[i] = attribs->fd[i];
data.strides[i] = attribs->stride[i];
data.offsets[i] = attribs->offset[i];
}
return gbm_bo_import(renderer->gbm, GBM_BO_IMPORT_FD_MODIFIER,
&data, GBM_BO_USE_SCANOUT);
}
}
bool export_drm_bo(struct gbm_bo *bo, struct wlr_dmabuf_attributes *attribs) {
memset(attribs, 0, sizeof(struct wlr_dmabuf_attributes));
attribs->n_planes = gbm_bo_get_plane_count(bo);
if (attribs->n_planes > WLR_DMABUF_MAX_PLANES) {
return false;
}
attribs->width = gbm_bo_get_width(bo);
attribs->height = gbm_bo_get_height(bo);
attribs->format = gbm_bo_get_format(bo);
attribs->modifier = gbm_bo_get_modifier(bo);
for (int i = 0; i < attribs->n_planes; ++i) {
attribs->offset[i] = gbm_bo_get_offset(bo, i);
attribs->stride[i] = gbm_bo_get_stride_for_plane(bo, i);
attribs->fd[i] = gbm_bo_get_fd(bo);
if (attribs->fd[i] < 0) {
for (int j = 0; j < i; ++j) {
close(attribs->fd[j]);
}
return false;
}
}
return true;
}
static void free_tex(struct gbm_bo *bo, void *data) {
struct wlr_texture *tex = data;
wlr_texture_destroy(tex);
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}
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static struct wlr_texture *get_tex_for_bo(struct wlr_drm_renderer *renderer,
struct gbm_bo *bo) {
struct wlr_texture *tex = gbm_bo_get_user_data(bo);
if (tex) {
return tex;
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}
struct wlr_dmabuf_attributes attribs;
if (!export_drm_bo(bo, &attribs)) {
return NULL;
}
tex = wlr_texture_from_dmabuf(renderer->wlr_rend, &attribs);
if (tex) {
gbm_bo_set_user_data(bo, tex, free_tex);
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}
return tex;
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}
struct gbm_bo *copy_drm_surface_mgpu(struct wlr_drm_surface *dest,
struct gbm_bo *src) {
make_drm_surface_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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float mat[9];
wlr_matrix_projection(mat, 1, 1, WL_OUTPUT_TRANSFORM_NORMAL);
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struct wlr_renderer *renderer = dest->renderer->wlr_rend;
wlr_renderer_begin(renderer, dest->width, dest->height);
wlr_renderer_clear(renderer, (float[]){ 0.0, 0.0, 0.0, 0.0 });
wlr_render_texture_with_matrix(renderer, tex, mat, 1.0f);
wlr_renderer_end(renderer);
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return swap_drm_surface_buffers(dest, NULL);
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}
bool init_drm_plane_surfaces(struct wlr_drm_plane *plane,
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struct wlr_drm_backend *drm, int32_t width, uint32_t height,
uint32_t format, bool with_modifiers) {
struct wlr_drm_format_set *format_set =
with_modifiers ? &plane->formats : NULL;
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if (!drm->parent) {
return init_drm_surface(&plane->surf, &drm->renderer, width, height,
format, format_set, GBM_BO_USE_SCANOUT);
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}
if (!init_drm_surface(&plane->surf, &drm->parent->renderer,
width, height, format, NULL, GBM_BO_USE_LINEAR)) {
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return false;
}
if (!init_drm_surface(&plane->mgpu_surf, &drm->renderer,
width, height, format, format_set, GBM_BO_USE_SCANOUT)) {
finish_drm_surface(&plane->surf);
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return false;
}
return true;
}