These changes are the raw update to qemu-2.6.
[kvmfornfv.git] / qemu / 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_r5g6b5:
92         surface->glformat = GL_RGB;
93         surface->gltype = GL_UNSIGNED_SHORT_5_6_5;
94         break;
95     default:
96         g_assert_not_reached();
97     }
98
99     glGenTextures(1, &surface->texture);
100     glEnable(GL_TEXTURE_2D);
101     glBindTexture(GL_TEXTURE_2D, surface->texture);
102     glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT,
103                   surface_stride(surface) / surface_bytes_per_pixel(surface));
104     glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
105                  surface_width(surface),
106                  surface_height(surface),
107                  0, surface->glformat, surface->gltype,
108                  surface_data(surface));
109
110     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
111     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
112 }
113
114 void surface_gl_update_texture(ConsoleGLState *gls,
115                                DisplaySurface *surface,
116                                int x, int y, int w, int h)
117 {
118     uint8_t *data = (void *)surface_data(surface);
119
120     assert(gls);
121
122     glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT,
123                   surface_stride(surface) / surface_bytes_per_pixel(surface));
124     glTexSubImage2D(GL_TEXTURE_2D, 0,
125                     x, y, w, h,
126                     surface->glformat, surface->gltype,
127                     data + surface_stride(surface) * y
128                     + surface_bytes_per_pixel(surface) * x);
129 }
130
131 void surface_gl_render_texture(ConsoleGLState *gls,
132                                DisplaySurface *surface)
133 {
134     assert(gls);
135
136     glClearColor(0.1f, 0.1f, 0.1f, 0.0f);
137     glClear(GL_COLOR_BUFFER_BIT);
138
139     qemu_gl_run_texture_blit(gls->texture_blit_prog,
140                              gls->texture_blit_vao);
141 }
142
143 void surface_gl_destroy_texture(ConsoleGLState *gls,
144                                 DisplaySurface *surface)
145 {
146     if (!surface || !surface->texture) {
147         return;
148     }
149     glDeleteTextures(1, &surface->texture);
150     surface->texture = 0;
151 }
152
153 void surface_gl_setup_viewport(ConsoleGLState *gls,
154                                DisplaySurface *surface,
155                                int ww, int wh)
156 {
157     int gw, gh, stripe;
158     float sw, sh;
159
160     assert(gls);
161
162     gw = surface_width(surface);
163     gh = surface_height(surface);
164
165     sw = (float)ww/gw;
166     sh = (float)wh/gh;
167     if (sw < sh) {
168         stripe = wh - wh*sw/sh;
169         glViewport(0, stripe / 2, ww, wh - stripe);
170     } else {
171         stripe = ww - ww*sh/sw;
172         glViewport(stripe / 2, 0, ww - stripe, wh);
173     }
174 }