409 lines
10 KiB
C
409 lines
10 KiB
C
#define _POSIX_C_SOURCE 200809L
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#include <assert.h>
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#include <fcntl.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <wlr/render/interface.h>
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#include <wlr/render/pixman.h>
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#include <wlr/render/wlr_renderer.h>
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#include <wlr/types/wlr_drm.h>
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#include <wlr/types/wlr_linux_dmabuf_v1.h>
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#include <wlr/types/wlr_matrix.h>
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#include <wlr/types/wlr_shm.h>
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#include <wlr/util/box.h>
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#include <wlr/util/log.h>
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#include <xf86drm.h>
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#include <wlr/config.h>
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#if WLR_HAS_GLES2_RENDERER
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#include <wlr/render/egl.h>
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#include <wlr/render/gles2.h>
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#endif
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#if WLR_HAS_VULKAN_RENDERER
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#include <wlr/render/vulkan.h>
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#endif // WLR_HAS_VULKAN_RENDERER
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#include "backend/backend.h"
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#include "render/pixel_format.h"
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#include "render/wlr_renderer.h"
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#include "util/env.h"
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void wlr_renderer_init(struct wlr_renderer *renderer,
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const struct wlr_renderer_impl *impl) {
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assert(impl->begin);
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assert(impl->clear);
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assert(impl->scissor);
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assert(impl->render_subtexture_with_matrix);
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assert(impl->render_quad_with_matrix);
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assert(impl->get_shm_texture_formats);
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assert(impl->get_render_buffer_caps);
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memset(renderer, 0, sizeof(*renderer));
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renderer->impl = impl;
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wl_signal_init(&renderer->events.destroy);
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wl_signal_init(&renderer->events.lost);
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}
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void wlr_renderer_destroy(struct wlr_renderer *r) {
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if (!r) {
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return;
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}
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assert(!r->rendering);
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wl_signal_emit_mutable(&r->events.destroy, r);
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if (r->impl && r->impl->destroy) {
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r->impl->destroy(r);
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} else {
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free(r);
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}
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}
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bool renderer_bind_buffer(struct wlr_renderer *r, struct wlr_buffer *buffer) {
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assert(!r->rendering);
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if (!r->impl->bind_buffer) {
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return false;
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}
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return r->impl->bind_buffer(r, buffer);
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}
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bool wlr_renderer_begin(struct wlr_renderer *r, uint32_t width, uint32_t height) {
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assert(!r->rendering);
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if (!r->impl->begin(r, width, height)) {
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return false;
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}
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r->rendering = true;
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return true;
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}
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bool wlr_renderer_begin_with_buffer(struct wlr_renderer *r,
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struct wlr_buffer *buffer) {
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if (!renderer_bind_buffer(r, buffer)) {
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return false;
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}
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if (!wlr_renderer_begin(r, buffer->width, buffer->height)) {
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renderer_bind_buffer(r, NULL);
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return false;
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}
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r->rendering_with_buffer = true;
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return true;
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}
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void wlr_renderer_end(struct wlr_renderer *r) {
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assert(r->rendering);
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if (r->impl->end) {
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r->impl->end(r);
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}
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r->rendering = false;
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if (r->rendering_with_buffer) {
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renderer_bind_buffer(r, NULL);
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r->rendering_with_buffer = false;
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}
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}
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void wlr_renderer_clear(struct wlr_renderer *r, const float color[static 4]) {
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assert(r->rendering);
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r->impl->clear(r, color);
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}
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void wlr_renderer_scissor(struct wlr_renderer *r, struct wlr_box *box) {
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assert(r->rendering);
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r->impl->scissor(r, box);
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}
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bool wlr_render_texture(struct wlr_renderer *r, struct wlr_texture *texture,
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const float projection[static 9], int x, int y, float alpha) {
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struct wlr_box box = {
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.x = x,
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.y = y,
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.width = texture->width,
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.height = texture->height,
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};
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float matrix[9];
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wlr_matrix_project_box(matrix, &box, WL_OUTPUT_TRANSFORM_NORMAL, 0,
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projection);
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return wlr_render_texture_with_matrix(r, texture, matrix, alpha);
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}
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bool wlr_render_texture_with_matrix(struct wlr_renderer *r,
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struct wlr_texture *texture, const float matrix[static 9],
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float alpha) {
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struct wlr_fbox box = {
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.x = 0,
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.y = 0,
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.width = texture->width,
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.height = texture->height,
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};
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return wlr_render_subtexture_with_matrix(r, texture, &box, matrix, alpha);
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}
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bool wlr_render_subtexture_with_matrix(struct wlr_renderer *r,
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struct wlr_texture *texture, const struct wlr_fbox *box,
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const float matrix[static 9], float alpha) {
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assert(r->rendering);
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return r->impl->render_subtexture_with_matrix(r, texture,
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box, matrix, alpha);
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}
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void wlr_render_rect(struct wlr_renderer *r, const struct wlr_box *box,
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const float color[static 4], const float projection[static 9]) {
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if (box->width == 0 || box->height == 0) {
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return;
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}
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assert(box->width > 0 && box->height > 0);
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float matrix[9];
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wlr_matrix_project_box(matrix, box, WL_OUTPUT_TRANSFORM_NORMAL, 0,
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projection);
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wlr_render_quad_with_matrix(r, color, matrix);
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}
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void wlr_render_quad_with_matrix(struct wlr_renderer *r,
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const float color[static 4], const float matrix[static 9]) {
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assert(r->rendering);
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r->impl->render_quad_with_matrix(r, color, matrix);
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}
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const uint32_t *wlr_renderer_get_shm_texture_formats(struct wlr_renderer *r,
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size_t *len) {
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return r->impl->get_shm_texture_formats(r, len);
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}
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const struct wlr_drm_format_set *wlr_renderer_get_dmabuf_texture_formats(
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struct wlr_renderer *r) {
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if (!r->impl->get_dmabuf_texture_formats) {
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return NULL;
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}
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return r->impl->get_dmabuf_texture_formats(r);
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}
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const struct wlr_drm_format_set *wlr_renderer_get_render_formats(
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struct wlr_renderer *r) {
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if (!r->impl->get_render_formats) {
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return NULL;
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}
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return r->impl->get_render_formats(r);
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}
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uint32_t renderer_get_render_buffer_caps(struct wlr_renderer *r) {
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return r->impl->get_render_buffer_caps(r);
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}
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bool wlr_renderer_read_pixels(struct wlr_renderer *r, uint32_t fmt,
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uint32_t stride, uint32_t width, uint32_t height,
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uint32_t src_x, uint32_t src_y, uint32_t dst_x, uint32_t dst_y,
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void *data) {
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if (!r->impl->read_pixels) {
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return false;
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}
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return r->impl->read_pixels(r, fmt, stride, width, height,
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src_x, src_y, dst_x, dst_y, data);
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}
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bool wlr_renderer_init_wl_shm(struct wlr_renderer *r,
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struct wl_display *wl_display) {
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return wlr_shm_create_with_renderer(wl_display, 1, r) != NULL;
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}
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bool wlr_renderer_init_wl_display(struct wlr_renderer *r,
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struct wl_display *wl_display) {
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if (!wlr_renderer_init_wl_shm(r, wl_display)) {
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return false;
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}
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if (wlr_renderer_get_dmabuf_texture_formats(r) != NULL) {
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if (wlr_renderer_get_drm_fd(r) >= 0) {
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if (wlr_drm_create(wl_display, r) == NULL) {
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return false;
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}
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} else {
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wlr_log(WLR_INFO, "Cannot get renderer DRM FD, disabling wl_drm");
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}
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if (wlr_linux_dmabuf_v1_create_with_renderer(wl_display, r) == NULL) {
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return false;
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}
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}
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return true;
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}
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static void log_creation_failure(bool is_auto, const char *msg) {
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wlr_log(is_auto ? WLR_DEBUG : WLR_ERROR, "%s%s", msg, is_auto ? ". Skipping!" : "");
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}
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struct wlr_renderer *renderer_autocreate_with_drm_fd(int drm_fd) {
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const char *renderer_options[] = {
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"auto",
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#if WLR_HAS_GLES2_RENDERER
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"gles2",
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#endif
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#if WLR_HAS_VULKAN_RENDERER
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"vulkan",
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#endif
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"pixman",
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NULL
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};
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const char *renderer_name = renderer_options[env_parse_switch("WLR_RENDERER", renderer_options)];
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bool is_auto = strcmp(renderer_name, "auto") == 0;
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struct wlr_renderer *renderer = NULL;
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#if WLR_HAS_GLES2_RENDERER
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if (!renderer && (is_auto || strcmp(renderer_name, "gles2") == 0)) {
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if (drm_fd < 0) {
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log_creation_failure(is_auto, "Cannot create GLES2 renderer: no DRM FD available");
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} else {
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renderer = wlr_gles2_renderer_create_with_drm_fd(drm_fd);
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if (!renderer) {
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log_creation_failure(is_auto, "Failed to create a GLES2 renderer");
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}
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}
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}
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#endif
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#if WLR_HAS_VULKAN_RENDERER
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if (!renderer && strcmp(renderer_name, "vulkan") == 0) {
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if (drm_fd < 0) {
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log_creation_failure(is_auto, "Cannot create Vulkan renderer: no DRM FD available");
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} else {
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renderer = wlr_vk_renderer_create_with_drm_fd(drm_fd);
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if (!renderer) {
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log_creation_failure(is_auto, "Failed to create a Vulkan renderer");
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}
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}
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}
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#endif
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bool has_render_node = false;
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if (!renderer && is_auto && drm_fd >= 0) {
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char *render_node = drmGetRenderDeviceNameFromFd(drm_fd);
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has_render_node = render_node != NULL;
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free(render_node);
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}
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if (!renderer && ((is_auto && !has_render_node) ||
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strcmp(renderer_name, "pixman") == 0)) {
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renderer = wlr_pixman_renderer_create();
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if (!renderer) {
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log_creation_failure(is_auto, "Failed to create a pixman renderer");
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}
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}
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if (!renderer) {
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wlr_log(WLR_ERROR, "Could not initialize renderer");
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}
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return renderer;
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}
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static int open_drm_render_node(void) {
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uint32_t flags = 0;
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int devices_len = drmGetDevices2(flags, NULL, 0);
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if (devices_len < 0) {
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wlr_log(WLR_ERROR, "drmGetDevices2 failed: %s", strerror(-devices_len));
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return -1;
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}
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drmDevice **devices = calloc(devices_len, sizeof(drmDevice *));
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if (devices == NULL) {
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wlr_log_errno(WLR_ERROR, "Allocation failed");
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return -1;
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}
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devices_len = drmGetDevices2(flags, devices, devices_len);
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if (devices_len < 0) {
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free(devices);
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wlr_log(WLR_ERROR, "drmGetDevices2 failed: %s", strerror(-devices_len));
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return -1;
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}
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int fd = -1;
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for (int i = 0; i < devices_len; i++) {
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drmDevice *dev = devices[i];
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if (dev->available_nodes & (1 << DRM_NODE_RENDER)) {
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const char *name = dev->nodes[DRM_NODE_RENDER];
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wlr_log(WLR_DEBUG, "Opening DRM render node '%s'", name);
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fd = open(name, O_RDWR | O_CLOEXEC);
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if (fd < 0) {
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wlr_log_errno(WLR_ERROR, "Failed to open '%s'", name);
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goto out;
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}
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break;
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}
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}
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if (fd < 0) {
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wlr_log(WLR_ERROR, "Failed to find any DRM render node");
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}
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out:
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for (int i = 0; i < devices_len; i++) {
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drmFreeDevice(&devices[i]);
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}
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free(devices);
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return fd;
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}
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struct wlr_renderer *wlr_renderer_autocreate(struct wlr_backend *backend) {
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int drm_fd = -1;
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int render_drm_fd = -1;
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// Allow the user to override the render node
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const char *render_name = getenv("WLR_RENDER_DRM_DEVICE");
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if (render_name != NULL) {
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wlr_log(WLR_INFO,
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"Opening DRM render node '%s' from WLR_RENDER_DRM_DEVICE",
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render_name);
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render_drm_fd = open(render_name, O_RDWR | O_CLOEXEC);
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if (render_drm_fd < 0) {
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wlr_log_errno(WLR_ERROR, "Failed to open '%s'", render_name);
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return NULL;
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}
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if (drmGetNodeTypeFromFd(render_drm_fd) != DRM_NODE_RENDER) {
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wlr_log(WLR_ERROR, "'%s' is not a DRM render node", render_name);
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close(render_drm_fd);
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return NULL;
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}
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drm_fd = render_drm_fd;
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}
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if (drm_fd < 0) {
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drm_fd = wlr_backend_get_drm_fd(backend);
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}
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// If the backend hasn't picked a DRM FD, but accepts DMA-BUFs, pick an
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// arbitrary render node
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uint32_t backend_caps = backend_get_buffer_caps(backend);
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if (drm_fd < 0 && (backend_caps & WLR_BUFFER_CAP_DMABUF) != 0) {
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render_drm_fd = open_drm_render_node();
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drm_fd = render_drm_fd;
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}
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// Note, drm_fd may be negative if unavailable
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struct wlr_renderer *renderer = renderer_autocreate_with_drm_fd(drm_fd);
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if (render_drm_fd >= 0) {
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close(render_drm_fd);
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}
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return renderer;
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}
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int wlr_renderer_get_drm_fd(struct wlr_renderer *r) {
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if (!r->impl->get_drm_fd) {
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return -1;
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}
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return r->impl->get_drm_fd(r);
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}
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