1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
#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, const float (*color)[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);
/**
* 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
|
