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/*
* This an unstable interface of wlroots. No guarantees are made regarding the
* future consistency of this API.
*/
#ifndef WLR_USE_UNSTABLE
#error "Add -DWLR_USE_UNSTABLE to enable unstable wlroots features"
#endif
#ifndef WLR_RENDER_WLR_RENDERER_H
#define WLR_RENDER_WLR_RENDERER_H
#include <stdint.h>
#include <wayland-server-core.h>
#include <wlr/render/wlr_texture.h>
struct wlr_backend;
struct wlr_renderer_impl;
struct wlr_drm_format_set;
struct wlr_buffer;
struct wlr_box;
struct wlr_fbox;
/**
* A renderer for basic 2D operations.
*/
struct wlr_renderer {
struct {
struct wl_signal destroy;
/**
* Emitted when the GPU is lost, e.g. on GPU reset.
*
* Compositors should destroy the renderer and re-create it.
*/
struct wl_signal lost;
} events;
// private state
const struct wlr_renderer_impl *impl;
bool rendering;
bool rendering_with_buffer;
};
/**
* Automatically create a new renderer.
*
* Selects an appropriate renderer type to use depending on the backend,
* platform, environment, etc.
*/
struct wlr_renderer *wlr_renderer_autocreate(struct wlr_backend *backend);
/**
* Start a render pass with the provided viewport.
*
* This should be called after wlr_output_attach_render(). Compositors must call
* wlr_renderer_end() when they are done.
*
* Returns false on failure, in which case compositors shouldn't try rendering.
*/
bool wlr_renderer_begin(struct wlr_renderer *r, uint32_t width, uint32_t height);
/**
* Start a render pass on the provided struct wlr_buffer.
*
* Compositors must call wlr_renderer_end() when they are done.
*/
bool wlr_renderer_begin_with_buffer(struct wlr_renderer *r,
struct wlr_buffer *buffer);
/**
* End a render pass.
*/
void wlr_renderer_end(struct wlr_renderer *r);
/**
* Clear the viewport with the provided color.
*/
void wlr_renderer_clear(struct wlr_renderer *r, const float color[static 4]);
/**
* Defines a scissor box. Only pixels that lie within the scissor box can be
* modified by drawing functions. Providing a NULL `box` disables the scissor
* box.
*/
void wlr_renderer_scissor(struct wlr_renderer *r, struct wlr_box *box);
/**
* Renders the requested texture.
*/
bool wlr_render_texture(struct wlr_renderer *r, struct wlr_texture *texture,
const float projection[static 9], int x, int y, float alpha);
/**
* Renders the requested texture using the provided matrix.
*/
bool wlr_render_texture_with_matrix(struct wlr_renderer *r,
struct wlr_texture *texture, const float matrix[static 9], float alpha);
/**
* Renders the requested texture using the provided matrix, after cropping it
* to the provided rectangle.
*/
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);
/**
* Renders a solid rectangle in the specified color.
*/
void wlr_render_rect(struct wlr_renderer *r, const struct wlr_box *box,
const float color[static 4], const float projection[static 9]);
/**
* Renders a solid quadrangle in the specified color with the specified matrix.
*/
void wlr_render_quad_with_matrix(struct wlr_renderer *r,
const float color[static 4], const float matrix[static 9]);
/**
* Get the shared-memory formats supporting import usage. Buffers allocated
* with a format from this list may be imported via wlr_texture_from_pixels().
*/
const uint32_t *wlr_renderer_get_shm_texture_formats(
struct wlr_renderer *r, size_t *len);
/**
* Get the DMA-BUF formats supporting sampling usage. Buffers allocated with
* a format from this list may be imported via wlr_texture_from_dmabuf().
*/
const struct wlr_drm_format_set *wlr_renderer_get_dmabuf_texture_formats(
struct wlr_renderer *renderer);
/**
* Reads out of pixels of the currently bound surface into data. `stride` is in
* bytes.
*/
bool wlr_renderer_read_pixels(struct wlr_renderer *r, uint32_t fmt,
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);
/**
* Initializes wl_shm, linux-dmabuf and other buffer factory protocols.
*
* Returns false on failure.
*/
bool wlr_renderer_init_wl_display(struct wlr_renderer *r,
struct wl_display *wl_display);
/**
* Initializes wl_shm on the provided struct wl_display.
*/
bool wlr_renderer_init_wl_shm(struct wlr_renderer *r,
struct wl_display *wl_display);
/**
* Obtains the FD of the DRM device used for rendering, or -1 if unavailable.
*
* The caller doesn't have ownership of the FD, it must not close it.
*/
int wlr_renderer_get_drm_fd(struct wlr_renderer *r);
/**
* Destroys the renderer.
*
* Textures must be destroyed separately.
*/
void wlr_renderer_destroy(struct wlr_renderer *renderer);
#endif
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