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#ifndef WLR_RENDER_H
#define WLR_RENDER_H
#include <stdint.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <wayland-server-protocol.h>
#include <wlr/types/wlr_box.h>
#include <wlr/types/wlr_output.h>
struct wlr_texture;
struct wlr_renderer;
void wlr_renderer_begin(struct wlr_renderer *r, struct wlr_output *output);
void wlr_renderer_end(struct wlr_renderer *r);
void wlr_renderer_clear(struct wlr_renderer *r, float red, float green,
float blue, float alpha);
/**
* 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);
/**
* Requests a texture handle from this renderer.
*/
struct wlr_texture *wlr_render_texture_create(struct wlr_renderer *r);
/**
* Renders the requested texture using the provided matrix. A typical texture
* rendering goes like so:
*
* struct wlr_renderer *renderer;
* struct wlr_texture *texture;
* float projection[16];
* float matrix[16];
* wlr_texture_get_matrix(texture, &matrix, &projection, 123, 321);
* wlr_render_with_matrix(renderer, texture, &matrix);
*
* This will render the texture at <123, 321>.
*/
bool wlr_render_with_matrix(struct wlr_renderer *r,
struct wlr_texture *texture, const float (*matrix)[16]);
/**
* Renders a solid quad in the specified color.
*/
void wlr_render_colored_quad(struct wlr_renderer *r,
const float (*color)[4], const float (*matrix)[16]);
/**
* Renders a solid ellipse in the specified color.
*/
void wlr_render_colored_ellipse(struct wlr_renderer *r,
const float (*color)[4], const float (*matrix)[16]);
/**
* Returns a list of pixel formats supported by this renderer.
*/
const enum wl_shm_format *wlr_renderer_get_formats(
struct wlr_renderer *r, size_t *len);
/**
* Returns true if this wl_buffer is a DRM buffer.
*/
bool wlr_renderer_buffer_is_drm(struct wlr_renderer *renderer,
struct wl_resource *buffer);
/**
* Reads out of pixels of the currently bound surface into data. `stride` is in
* bytes.
*/
bool wlr_renderer_read_pixels(struct wlr_renderer *r, enum wl_shm_format 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);
/**
* Checks if a format is supported.
*/
bool wlr_renderer_format_supported(struct wlr_renderer *r,
enum wl_shm_format fmt);
/**
* Destroys this wlr_renderer. Textures must be destroyed separately.
*/
void wlr_renderer_destroy(struct wlr_renderer *renderer);
struct wlr_texture_impl;
struct wlr_texture {
struct wlr_texture_impl *impl;
bool valid;
uint32_t format;
int width, height;
struct wl_signal destroy_signal;
struct wl_resource *resource;
};
/**
* Copies pixels to this texture. The buffer is not accessed after this function
* returns.
*/
bool wlr_texture_upload_pixels(struct wlr_texture *tex,
enum wl_shm_format format, int stride, int width, int height,
const unsigned char *pixels);
/**
* Copies pixels to this texture. The buffer is not accessed after this function
* returns. Under some circumstances, this function may re-upload the entire
* buffer - therefore, the entire buffer must be valid.
*/
bool wlr_texture_update_pixels(struct wlr_texture *surf,
enum wl_shm_format format, int stride, int x, int y,
int width, int height, const unsigned char *pixels);
/**
* Copies pixels from a wl_shm_buffer into this texture. The buffer is not
* accessed after this function returns.
*/
bool wlr_texture_upload_shm(struct wlr_texture *tex, uint32_t format,
struct wl_shm_buffer *shm);
/**
* Attaches the contents from the given wl_drm wl_buffer resource onto the
* texture. The wl_resource is not used after this call.
* Will fail (return false) if the given resource is no drm buffer.
*/
bool wlr_texture_upload_drm(struct wlr_texture *tex,
struct wl_resource *drm_buffer);
bool wlr_texture_upload_eglimage(struct wlr_texture *tex,
EGLImageKHR image, uint32_t width, uint32_t height);
/**
* Copies a rectangle of pixels from a wl_shm_buffer onto the texture. The
* buffer is not accessed after this function returns. Under some circumstances,
* this function may re-upload the entire buffer - therefore, the entire buffer
* must be valid.
*/
bool wlr_texture_update_shm(struct wlr_texture *surf, uint32_t format,
int x, int y, int width, int height, struct wl_shm_buffer *shm);
/**
* Prepares a matrix with the appropriate scale for the given texture and
* multiplies it with the projection, producing a matrix that the shader can
* muptlipy vertex coordinates with to get final screen coordinates.
*
* The projection matrix is assumed to be an orthographic projection of [0,
* width) and [0, height], and the x and y coordinates provided are used as
* such.
*/
void wlr_texture_get_matrix(struct wlr_texture *texture,
float (*matrix)[16], const float (*projection)[16], int x, int y);
/**
* Destroys this wlr_texture.
*/
void wlr_texture_destroy(struct wlr_texture *texture);
#endif
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