aboutsummaryrefslogtreecommitdiff
path: root/render/gles2/pixel_format.c
blob: fdf091f158ebce0534148ffbe9f4fb15a898f868 (plain)
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
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
#define _POSIX_C_SOURCE 199309L
#include <drm_fourcc.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include "render/gles2.h"
#include "render/pixel_format.h"

/*
 * The DRM formats are little endian while the GL formats are big endian,
 * so DRM_FORMAT_ARGB8888 is actually compatible with GL_BGRA_EXT.
 */
static const struct wlr_gles2_pixel_format formats[] = {
	{
		.drm_format = DRM_FORMAT_ARGB8888,
		.gl_format = GL_BGRA_EXT,
		.gl_type = GL_UNSIGNED_BYTE,
	},
	{
		.drm_format = DRM_FORMAT_XRGB8888,
		.gl_format = GL_BGRA_EXT,
		.gl_type = GL_UNSIGNED_BYTE,
	},
	{
		.drm_format = DRM_FORMAT_XBGR8888,
		.gl_format = GL_RGBA,
		.gl_type = GL_UNSIGNED_BYTE,
	},
	{
		.drm_format = DRM_FORMAT_ABGR8888,
		.gl_format = GL_RGBA,
		.gl_type = GL_UNSIGNED_BYTE,
	},
	{
		.drm_format = DRM_FORMAT_BGR888,
		.gl_format = GL_RGB,
		.gl_type = GL_UNSIGNED_BYTE,
	},
#if WLR_LITTLE_ENDIAN
	{
		.drm_format = DRM_FORMAT_RGBX4444,
		.gl_format = GL_RGBA,
		.gl_type = GL_UNSIGNED_SHORT_4_4_4_4,
	},
	{
		.drm_format = DRM_FORMAT_RGBA4444,
		.gl_format = GL_RGBA,
		.gl_type = GL_UNSIGNED_SHORT_4_4_4_4,
	},
	{
		.drm_format = DRM_FORMAT_RGBX5551,
		.gl_format = GL_RGBA,
		.gl_type = GL_UNSIGNED_SHORT_5_5_5_1,
	},
	{
		.drm_format = DRM_FORMAT_RGBA5551,
		.gl_format = GL_RGBA,
		.gl_type = GL_UNSIGNED_SHORT_5_5_5_1,
	},
	{
		.drm_format = DRM_FORMAT_RGB565,
		.gl_format = GL_RGB,
		.gl_type = GL_UNSIGNED_SHORT_5_6_5,
	},
	{
		.drm_format = DRM_FORMAT_XBGR2101010,
		.gl_format = GL_RGBA,
		.gl_type = GL_UNSIGNED_INT_2_10_10_10_REV_EXT,
	},
	{
		.drm_format = DRM_FORMAT_ABGR2101010,
		.gl_format = GL_RGBA,
		.gl_type = GL_UNSIGNED_INT_2_10_10_10_REV_EXT,
	},
	{
		.drm_format = DRM_FORMAT_XBGR16161616F,
		.gl_format = GL_RGBA,
		.gl_type = GL_HALF_FLOAT_OES,
	},
	{
		.drm_format = DRM_FORMAT_ABGR16161616F,
		.gl_format = GL_RGBA,
		.gl_type = GL_HALF_FLOAT_OES,
	},
	{
		.drm_format = DRM_FORMAT_XBGR16161616,
		.gl_internalformat = GL_RGBA16_EXT,
		.gl_format = GL_RGBA,
		.gl_type = GL_UNSIGNED_SHORT,
	},
	{
		.drm_format = DRM_FORMAT_ABGR16161616,
		.gl_internalformat = GL_RGBA16_EXT,
		.gl_format = GL_RGBA,
		.gl_type = GL_UNSIGNED_SHORT,
	},
#endif
};

// TODO: more pixel formats

/*
 * Return true if supported for texturing, even if other operations like
 * reading aren't supported.
 */
bool is_gles2_pixel_format_supported(const struct wlr_gles2_renderer *renderer,
		const struct wlr_gles2_pixel_format *format) {
	if (format->gl_type == GL_UNSIGNED_INT_2_10_10_10_REV_EXT
			&& !renderer->exts.EXT_texture_type_2_10_10_10_REV) {
		return false;
	}
	if (format->gl_type == GL_HALF_FLOAT_OES
			&& !renderer->exts.OES_texture_half_float_linear) {
		return false;
	}
	if (format->gl_type == GL_UNSIGNED_SHORT
			&& !renderer->exts.EXT_texture_norm16) {
		return false;
	}
	/*
	 * Note that we don't need to check for GL_EXT_texture_format_BGRA8888
	 * here, since we've already checked if we have it at renderer creation
	 * time and bailed out if not. We do the check there because Wayland
	 * requires all compositors to support SHM buffers in that format.
	 */
	return true;
}

const struct wlr_gles2_pixel_format *get_gles2_format_from_drm(uint32_t fmt) {
	for (size_t i = 0; i < sizeof(formats) / sizeof(*formats); ++i) {
		if (formats[i].drm_format == fmt) {
			return &formats[i];
		}
	}
	return NULL;
}

const struct wlr_gles2_pixel_format *get_gles2_format_from_gl(
		GLint gl_format, GLint gl_type, bool alpha) {
	for (size_t i = 0; i < sizeof(formats) / sizeof(*formats); ++i) {
		if (formats[i].gl_format != gl_format ||
				formats[i].gl_type != gl_type) {
			continue;
		}

		if (pixel_format_has_alpha(formats[i].drm_format) != alpha) {
			continue;
		}

		return &formats[i];
	}
	return NULL;
}

const uint32_t *get_gles2_shm_formats(const struct wlr_gles2_renderer *renderer,
		size_t *len) {
	static uint32_t shm_formats[sizeof(formats) / sizeof(formats[0])];
	size_t j = 0;
	for (size_t i = 0; i < sizeof(formats) / sizeof(formats[0]); i++) {
		if (!is_gles2_pixel_format_supported(renderer, &formats[i])) {
			continue;
		}
		shm_formats[j++] = formats[i].drm_format;
	}
	*len = j;
	return shm_formats;
}