wlroots/render/wlr_renderer.c

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#include <assert.h>
#include <stdbool.h>
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#include <stdlib.h>
#include <gbm.h>
#include <wlr/render/egl.h>
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#include <wlr/render/gles2.h>
#include <wlr/render/interface.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/types/wlr_matrix.h>
#include <wlr/util/log.h>
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#include "util/signal.h"
#include "render/pixel_format.h"
#include "render/wlr_renderer.h"
#include "backend/backend.h"
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void wlr_renderer_init(struct wlr_renderer *renderer,
const struct wlr_renderer_impl *impl) {
assert(impl->begin);
assert(impl->clear);
assert(impl->scissor);
assert(impl->render_subtexture_with_matrix);
assert(impl->render_quad_with_matrix);
assert(impl->get_shm_texture_formats);
assert(impl->texture_from_pixels);
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renderer->impl = impl;
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wl_signal_init(&renderer->events.destroy);
}
void wlr_renderer_destroy(struct wlr_renderer *r) {
if (!r) {
return;
}
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wlr_signal_emit_safe(&r->events.destroy, r);
if (r->impl && r->impl->destroy) {
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r->impl->destroy(r);
} else {
free(r);
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}
}
bool wlr_renderer_bind_buffer(struct wlr_renderer *r,
struct wlr_buffer *buffer) {
assert(!r->rendering);
if (!r->impl->bind_buffer) {
return false;
}
return r->impl->bind_buffer(r, buffer);
}
void wlr_renderer_begin(struct wlr_renderer *r, uint32_t width, uint32_t height) {
assert(!r->rendering);
r->impl->begin(r, width, height);
r->rendering = true;
}
void wlr_renderer_end(struct wlr_renderer *r) {
assert(r->rendering);
if (r->impl->end) {
r->impl->end(r);
}
r->rendering = false;
}
void wlr_renderer_clear(struct wlr_renderer *r, const float color[static 4]) {
assert(r->rendering);
r->impl->clear(r, color);
}
void wlr_renderer_scissor(struct wlr_renderer *r, struct wlr_box *box) {
assert(r->rendering);
r->impl->scissor(r, box);
}
bool wlr_render_texture(struct wlr_renderer *r, struct wlr_texture *texture,
const float projection[static 9], int x, int y, float alpha) {
struct wlr_box box = {
.x = x,
.y = y,
.width = texture->width,
.height = texture->height,
};
float matrix[9];
wlr_matrix_project_box(matrix, &box, WL_OUTPUT_TRANSFORM_NORMAL, 0,
projection);
return wlr_render_texture_with_matrix(r, texture, matrix, alpha);
}
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bool wlr_render_texture_with_matrix(struct wlr_renderer *r,
struct wlr_texture *texture, const float matrix[static 9],
float alpha) {
struct wlr_fbox box = {
.x = 0,
.y = 0,
.width = texture->width,
.height = texture->height,
};
return wlr_render_subtexture_with_matrix(r, texture, &box, matrix, alpha);
}
bool wlr_render_subtexture_with_matrix(struct wlr_renderer *r,
struct wlr_texture *texture, const struct wlr_fbox *box,
const float matrix[static 9], float alpha) {
assert(r->rendering);
return r->impl->render_subtexture_with_matrix(r, texture,
box, matrix, alpha);
}
void wlr_render_rect(struct wlr_renderer *r, const struct wlr_box *box,
const float color[static 4], const float projection[static 9]) {
if (box->width == 0 || box->height == 0) {
return;
}
assert(box->width > 0 && box->height > 0);
float matrix[9];
wlr_matrix_project_box(matrix, box, WL_OUTPUT_TRANSFORM_NORMAL, 0,
projection);
wlr_render_quad_with_matrix(r, color, matrix);
}
void wlr_render_quad_with_matrix(struct wlr_renderer *r,
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const float color[static 4], const float matrix[static 9]) {
assert(r->rendering);
r->impl->render_quad_with_matrix(r, color, matrix);
}
const uint32_t *wlr_renderer_get_shm_texture_formats(struct wlr_renderer *r,
size_t *len) {
return r->impl->get_shm_texture_formats(r, len);
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}
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bool wlr_renderer_resource_is_wl_drm_buffer(struct wlr_renderer *r,
struct wl_resource *resource) {
if (!r->impl->resource_is_wl_drm_buffer) {
return false;
}
return r->impl->resource_is_wl_drm_buffer(r, resource);
}
void wlr_renderer_wl_drm_buffer_get_size(struct wlr_renderer *r,
struct wl_resource *buffer, int *width, int *height) {
if (!r->impl->wl_drm_buffer_get_size) {
return;
}
return r->impl->wl_drm_buffer_get_size(r, buffer, width, height);
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}
const struct wlr_drm_format_set *wlr_renderer_get_dmabuf_texture_formats(
struct wlr_renderer *r) {
if (!r->impl->get_dmabuf_texture_formats) {
return NULL;
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}
return r->impl->get_dmabuf_texture_formats(r);
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}
const struct wlr_drm_format_set *wlr_renderer_get_dmabuf_render_formats(
struct wlr_renderer *r) {
if (!r->impl->get_dmabuf_render_formats) {
return NULL;
}
return r->impl->get_dmabuf_render_formats(r);
}
bool wlr_renderer_read_pixels(struct wlr_renderer *r, uint32_t fmt,
uint32_t *flags, uint32_t stride, uint32_t width, uint32_t height,
uint32_t src_x, uint32_t src_y, uint32_t dst_x, uint32_t dst_y,
void *data) {
if (!r->impl->read_pixels) {
return false;
}
return r->impl->read_pixels(r, fmt, flags, stride, width, height,
src_x, src_y, dst_x, dst_y, data);
}
bool wlr_renderer_init_wl_display(struct wlr_renderer *r,
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struct wl_display *wl_display) {
if (wl_display_init_shm(wl_display)) {
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wlr_log(WLR_ERROR, "Failed to initialize shm");
return false;
}
size_t len;
const uint32_t *formats = wlr_renderer_get_shm_texture_formats(r, &len);
if (formats == NULL) {
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wlr_log(WLR_ERROR, "Failed to initialize shm: cannot get formats");
return false;
}
bool argb8888 = false, xrgb8888 = false;
for (size_t i = 0; i < len; ++i) {
// ARGB8888 and XRGB8888 must be supported and are implicitly
// advertised by wl_display_init_shm
enum wl_shm_format fmt = convert_drm_format_to_wl_shm(formats[i]);
switch (fmt) {
case WL_SHM_FORMAT_ARGB8888:
argb8888 = true;
break;
case WL_SHM_FORMAT_XRGB8888:
xrgb8888 = true;
break;
default:
wl_display_add_shm_format(wl_display, fmt);
}
}
assert(argb8888 && xrgb8888);
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if (r->impl->init_wl_display) {
if (!r->impl->init_wl_display(r, wl_display)) {
return false;
}
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}
return true;
}
struct wlr_renderer *wlr_renderer_autocreate_with_drm_fd(int drm_fd) {
struct gbm_device *gbm_device = gbm_create_device(drm_fd);
if (!gbm_device) {
wlr_log(WLR_ERROR, "Failed to create GBM device");
return NULL;
}
struct wlr_egl *egl = wlr_egl_create(EGL_PLATFORM_GBM_KHR, gbm_device);
if (egl == NULL) {
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wlr_log(WLR_ERROR, "Could not initialize EGL");
gbm_device_destroy(gbm_device);
return NULL;
}
egl->gbm_device = gbm_device;
struct wlr_renderer *renderer = wlr_gles2_renderer_create(egl);
if (!renderer) {
wlr_log(WLR_ERROR, "Failed to create GLES2 renderer");
wlr_egl_destroy(egl);
}
return renderer;
}
struct wlr_renderer *wlr_renderer_autocreate(struct wlr_backend *backend) {
int drm_fd = backend_get_drm_fd(backend);
if (drm_fd < 0) {
wlr_log(WLR_ERROR, "Failed to get DRM FD from backend");
return NULL;
}
return wlr_renderer_autocreate_with_drm_fd(drm_fd);
}
int wlr_renderer_get_drm_fd(struct wlr_renderer *r) {
if (!r->impl->get_drm_fd) {
return -1;
}
return r->impl->get_drm_fd(r);
}