Merge remote-tracking branch 'remotes/rth/tags/pull-pa-20200127' into staging
[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 "ui/console.h"
29 #include "ui/shader.h"
30
31 /* ---------------------------------------------------------------------- */
32
33 bool console_gl_check_format(DisplayChangeListener *dcl,
34 pixman_format_code_t format)
35 {
36 switch (format) {
37 case PIXMAN_BE_b8g8r8x8:
38 case PIXMAN_BE_b8g8r8a8:
39 case PIXMAN_r5g6b5:
40 return true;
41 default:
42 return false;
43 }
44 }
45
46 void surface_gl_create_texture(QemuGLShader *gls,
47 DisplaySurface *surface)
48 {
49 assert(gls);
50 assert(QEMU_IS_ALIGNED(surface_stride(surface), surface_bytes_per_pixel(surface)));
51
52 switch (surface->format) {
53 case PIXMAN_BE_b8g8r8x8:
54 case PIXMAN_BE_b8g8r8a8:
55 surface->glformat = GL_BGRA_EXT;
56 surface->gltype = GL_UNSIGNED_BYTE;
57 break;
58 case PIXMAN_BE_x8r8g8b8:
59 case PIXMAN_BE_a8r8g8b8:
60 surface->glformat = GL_RGBA;
61 surface->gltype = GL_UNSIGNED_BYTE;
62 break;
63 case PIXMAN_r5g6b5:
64 surface->glformat = GL_RGB;
65 surface->gltype = GL_UNSIGNED_SHORT_5_6_5;
66 break;
67 default:
68 g_assert_not_reached();
69 }
70
71 glGenTextures(1, &surface->texture);
72 glEnable(GL_TEXTURE_2D);
73 glBindTexture(GL_TEXTURE_2D, surface->texture);
74 glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT,
75 surface_stride(surface) / surface_bytes_per_pixel(surface));
76 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
77 surface_width(surface),
78 surface_height(surface),
79 0, surface->glformat, surface->gltype,
80 surface_data(surface));
81
82 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
83 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
84 }
85
86 void surface_gl_update_texture(QemuGLShader *gls,
87 DisplaySurface *surface,
88 int x, int y, int w, int h)
89 {
90 uint8_t *data = (void *)surface_data(surface);
91
92 assert(gls);
93
94 if (surface->texture) {
95 glBindTexture(GL_TEXTURE_2D, surface->texture);
96 glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT,
97 surface_stride(surface)
98 / surface_bytes_per_pixel(surface));
99 glTexSubImage2D(GL_TEXTURE_2D, 0,
100 x, y, w, h,
101 surface->glformat, surface->gltype,
102 data + surface_stride(surface) * y
103 + surface_bytes_per_pixel(surface) * x);
104 }
105 }
106
107 void surface_gl_render_texture(QemuGLShader *gls,
108 DisplaySurface *surface)
109 {
110 assert(gls);
111
112 glClearColor(0.1f, 0.1f, 0.1f, 0.0f);
113 glClear(GL_COLOR_BUFFER_BIT);
114
115 qemu_gl_run_texture_blit(gls, false);
116 }
117
118 void surface_gl_destroy_texture(QemuGLShader *gls,
119 DisplaySurface *surface)
120 {
121 if (!surface || !surface->texture) {
122 return;
123 }
124 glDeleteTextures(1, &surface->texture);
125 surface->texture = 0;
126 }
127
128 void surface_gl_setup_viewport(QemuGLShader *gls,
129 DisplaySurface *surface,
130 int ww, int wh)
131 {
132 int gw, gh, stripe;
133 float sw, sh;
134
135 assert(gls);
136
137 gw = surface_width(surface);
138 gh = surface_height(surface);
139
140 sw = (float)ww/gw;
141 sh = (float)wh/gh;
142 if (sw < sh) {
143 stripe = wh - wh*sw/sh;
144 glViewport(0, stripe / 2, ww, wh - stripe);
145 } else {
146 stripe = ww - ww*sh/sw;
147 glViewport(stripe / 2, 0, ww - stripe, wh);
148 }
149 }