quorum: Inline quorum_aio_cb()
[qemu.git] / ui / console-gl.c
1 /*
2 * QEMU graphical console -- opengl helper bits
3 *
4 * Copyright (c) 2014 Red Hat
5 *
6 * Authors:
7 * Gerd Hoffmann <kraxel@redhat.com>
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a copy
10 * of this software and associated documentation files (the "Software"), to deal
11 * in the Software without restriction, including without limitation the rights
12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 * copies of the Software, and to permit persons to whom the Software is
14 * furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 * THE SOFTWARE.
26 */
27 #include "qemu/osdep.h"
28 #include "qemu-common.h"
29 #include "ui/console.h"
30 #include "ui/shader.h"
31
32 #include "shader/texture-blit-vert.h"
33 #include "shader/texture-blit-frag.h"
34
35 struct ConsoleGLState {
36 GLint texture_blit_prog;
37 GLint texture_blit_vao;
38 };
39
40 /* ---------------------------------------------------------------------- */
41
42 ConsoleGLState *console_gl_init_context(void)
43 {
44 ConsoleGLState *gls = g_new0(ConsoleGLState, 1);
45
46 gls->texture_blit_prog = qemu_gl_create_compile_link_program
47 (texture_blit_vert_src, texture_blit_frag_src);
48 if (!gls->texture_blit_prog) {
49 exit(1);
50 }
51
52 gls->texture_blit_vao =
53 qemu_gl_init_texture_blit(gls->texture_blit_prog);
54
55 return gls;
56 }
57
58 void console_gl_fini_context(ConsoleGLState *gls)
59 {
60 if (!gls) {
61 return;
62 }
63 g_free(gls);
64 }
65
66 bool console_gl_check_format(DisplayChangeListener *dcl,
67 pixman_format_code_t format)
68 {
69 switch (format) {
70 case PIXMAN_BE_b8g8r8x8:
71 case PIXMAN_BE_b8g8r8a8:
72 case PIXMAN_r5g6b5:
73 return true;
74 default:
75 return false;
76 }
77 }
78
79 void surface_gl_create_texture(ConsoleGLState *gls,
80 DisplaySurface *surface)
81 {
82 assert(gls);
83 assert(surface_stride(surface) % surface_bytes_per_pixel(surface) == 0);
84
85 switch (surface->format) {
86 case PIXMAN_BE_b8g8r8x8:
87 case PIXMAN_BE_b8g8r8a8:
88 surface->glformat = GL_BGRA_EXT;
89 surface->gltype = GL_UNSIGNED_BYTE;
90 break;
91 case PIXMAN_BE_x8r8g8b8:
92 case PIXMAN_BE_a8r8g8b8:
93 surface->glformat = GL_RGBA;
94 surface->gltype = GL_UNSIGNED_BYTE;
95 break;
96 case PIXMAN_r5g6b5:
97 surface->glformat = GL_RGB;
98 surface->gltype = GL_UNSIGNED_SHORT_5_6_5;
99 break;
100 default:
101 g_assert_not_reached();
102 }
103
104 glGenTextures(1, &surface->texture);
105 glEnable(GL_TEXTURE_2D);
106 glBindTexture(GL_TEXTURE_2D, surface->texture);
107 glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT,
108 surface_stride(surface) / surface_bytes_per_pixel(surface));
109 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
110 surface_width(surface),
111 surface_height(surface),
112 0, surface->glformat, surface->gltype,
113 surface_data(surface));
114
115 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
116 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
117 }
118
119 void surface_gl_update_texture(ConsoleGLState *gls,
120 DisplaySurface *surface,
121 int x, int y, int w, int h)
122 {
123 uint8_t *data = (void *)surface_data(surface);
124
125 assert(gls);
126
127 glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT,
128 surface_stride(surface) / surface_bytes_per_pixel(surface));
129 glTexSubImage2D(GL_TEXTURE_2D, 0,
130 x, y, w, h,
131 surface->glformat, surface->gltype,
132 data + surface_stride(surface) * y
133 + surface_bytes_per_pixel(surface) * x);
134 }
135
136 void surface_gl_render_texture(ConsoleGLState *gls,
137 DisplaySurface *surface)
138 {
139 assert(gls);
140
141 glClearColor(0.1f, 0.1f, 0.1f, 0.0f);
142 glClear(GL_COLOR_BUFFER_BIT);
143
144 qemu_gl_run_texture_blit(gls->texture_blit_prog,
145 gls->texture_blit_vao);
146 }
147
148 void surface_gl_destroy_texture(ConsoleGLState *gls,
149 DisplaySurface *surface)
150 {
151 if (!surface || !surface->texture) {
152 return;
153 }
154 glDeleteTextures(1, &surface->texture);
155 surface->texture = 0;
156 }
157
158 void surface_gl_setup_viewport(ConsoleGLState *gls,
159 DisplaySurface *surface,
160 int ww, int wh)
161 {
162 int gw, gh, stripe;
163 float sw, sh;
164
165 assert(gls);
166
167 gw = surface_width(surface);
168 gh = surface_height(surface);
169
170 sw = (float)ww/gw;
171 sh = (float)wh/gh;
172 if (sw < sh) {
173 stripe = wh - wh*sw/sh;
174 glViewport(0, stripe / 2, ww, wh - stripe);
175 } else {
176 stripe = ww - ww*sh/sw;
177 glViewport(stripe / 2, 0, ww - stripe, wh);
178 }
179 }