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