@samitouri / QOSamiQemu
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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 <epoxy/gl.h>
29 #include "qemu/error-report.h"
30 #include "ui/console.h"
31 #include "ui/shader.h"
32
33 /* ---------------------------------------------------------------------- */
34
35 static bool map_format(pixman_format_code_t format,
36 GLenum *glformat, GLenum *gltype)
37 {
38 switch (format) {
39 case PIXMAN_BE_b8g8r8x8:
40 case PIXMAN_BE_b8g8r8a8:
41 *glformat = GL_BGRA_EXT;
42 *gltype = GL_UNSIGNED_BYTE;
43 return true;
44 case PIXMAN_BE_x8r8g8b8:
45 case PIXMAN_BE_a8r8g8b8:
46 *glformat = GL_RGBA;
47 *gltype = GL_UNSIGNED_BYTE;
48 return true;
49 case PIXMAN_r5g6b5:
50 *glformat = GL_RGB;
51 *gltype = GL_UNSIGNED_SHORT_5_6_5;
52 return true;
53 default:
54 return false;
55 }
56 }
57
58 bool console_gl_check_format(DisplayChangeListener *dcl,
59 pixman_format_code_t format)
60 {
61 GLenum glformat;
62 GLenum gltype;
63
64 return map_format(format, &glformat, &gltype);
65 }
66
67 void surface_gl_create_texture(QemuGLShader *gls,
68 DisplaySurface *surface)
69 {
70 GLenum glformat;
71 GLenum gltype;
72
73 assert(gls);
74 assert(QEMU_IS_ALIGNED(surface_stride(surface), surface_bytes_per_pixel(surface)));
75
76 if (surface->texture) {
77 return;
78 }
79
80 assert(map_format(surface_format(surface), &glformat, &gltype));
81 glGenTextures(1, &surface->texture);
82 glEnable(GL_TEXTURE_2D);
83 glBindTexture(GL_TEXTURE_2D, surface->texture);
84 glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT,
85 surface_stride(surface) / surface_bytes_per_pixel(surface));
86 if (epoxy_is_desktop_gl()) {
87 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
88 surface_width(surface), surface_height(surface), 0,
89 glformat, gltype, surface_data(surface));
90 } else {
91 glTexImage2D(GL_TEXTURE_2D, 0, glformat,
92 surface_width(surface), surface_height(surface), 0,
93 glformat, gltype, surface_data(surface));
94 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_A, GL_ONE);
95 }
96
97 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
98 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
99 }
100
101 bool surface_gl_create_texture_from_fd(DisplaySurface *surface,
102 int fd, GLuint *texture,
103 GLuint *mem_obj)
104 {
105 unsigned long size = surface_stride(surface) * surface_height(surface);
106 GLenum err = glGetError();
107 *texture = 0;
108 *mem_obj = 0;
109
110 if (!epoxy_has_gl_extension("GL_EXT_memory_object") ||
111 !epoxy_has_gl_extension("GL_EXT_memory_object_fd")) {
112 error_report("spice: required OpenGL extensions not supported: "
113 "GL_EXT_memory_object and GL_EXT_memory_object_fd");
114 return false;
115 }
116
117 #ifdef GL_EXT_memory_object_fd
118 glCreateMemoryObjectsEXT(1, mem_obj);
119 glImportMemoryFdEXT(*mem_obj, size, GL_HANDLE_TYPE_OPAQUE_FD_EXT, fd);
120
121 err = glGetError();
122 if (err != GL_NO_ERROR) {
123 error_report("spice: cannot import memory object from fd");
124 goto cleanup_mem;
125 }
126
127 glGenTextures(1, texture);
128 glBindTexture(GL_TEXTURE_2D, *texture);
129 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_TILING_EXT, GL_LINEAR_TILING_EXT);
130 glTexStorageMem2DEXT(GL_TEXTURE_2D, 1, GL_RGBA8, surface_width(surface),
131 surface_height(surface), *mem_obj, 0);
132 err = glGetError();
133 if (err != GL_NO_ERROR) {
134 error_report("spice: cannot create texture from memory object");
135 goto cleanup_tex_and_mem;
136 }
137 return true;
138
139 cleanup_tex_and_mem:
140 glDeleteTextures(1, texture);
141 cleanup_mem:
142 glDeleteMemoryObjectsEXT(1, mem_obj);
143
144 #endif
145 return false;
146 }
147
148 void surface_gl_update_texture(QemuGLShader *gls,
149 DisplaySurface *surface,
150 int x, int y, int w, int h)
151 {
152 uint8_t *data = (void *)surface_data(surface);
153 GLenum glformat;
154 GLenum gltype;
155
156 assert(gls);
157 assert(map_format(surface_format(surface), &glformat, &gltype));
158
159 if (surface->texture) {
160 glBindTexture(GL_TEXTURE_2D, surface->texture);
161 glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT,
162 surface_stride(surface)
163 / surface_bytes_per_pixel(surface));
164 glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, w, h, glformat, gltype,
165 data + surface_stride(surface) * y
166 + surface_bytes_per_pixel(surface) * x);
167 }
168 }
169
170 void surface_gl_render_texture(QemuGLShader *gls,
171 DisplaySurface *surface)
172 {
173 assert(gls);
174
175 glClearColor(0.1f, 0.1f, 0.1f, 0.0f);
176 glClear(GL_COLOR_BUFFER_BIT);
177
178 qemu_gl_run_texture_blit(gls, false);
179 }
180
181 void surface_gl_destroy_texture(QemuGLShader *gls,
182 DisplaySurface *surface)
183 {
184 if (!surface || !surface->texture) {
185 return;
186 }
187 glDeleteTextures(1, &surface->texture);
188 surface->texture = 0;
189 }
190
191 void surface_gl_setup_viewport(QemuGLShader *gls,
192 DisplaySurface *surface,
193 int ww, int wh)
194 {
195 int gw, gh, stripe;
196 float sw, sh;
197
198 assert(gls);
199
200 gw = surface_width(surface);
201 gh = surface_height(surface);
202
203 sw = (float)ww/gw;
204 sh = (float)wh/gh;
205 if (sw < sh) {
206 stripe = wh - wh*sw/sh;
207 glViewport(0, stripe / 2, ww, wh - stripe);
208 } else {
209 stripe = ww - ww*sh/sw;
210 glViewport(stripe / 2, 0, ww - stripe, wh);
211 }
212 }