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/error-report.h"
29 #include "ui/console.h"
30 #include "ui/shader.h"
31
32 /* ---------------------------------------------------------------------- */
33
console_gl_check_format(DisplayChangeListener * dcl,pixman_format_code_t format)34 bool console_gl_check_format(DisplayChangeListener *dcl,
35 pixman_format_code_t format)
36 {
37 switch (format) {
38 case PIXMAN_BE_b8g8r8x8:
39 case PIXMAN_BE_b8g8r8a8:
40 case PIXMAN_r5g6b5:
41 return true;
42 default:
43 return false;
44 }
45 }
46
surface_gl_create_texture(QemuGLShader * gls,DisplaySurface * surface)47 void surface_gl_create_texture(QemuGLShader *gls,
48 DisplaySurface *surface)
49 {
50 assert(gls);
51 assert(QEMU_IS_ALIGNED(surface_stride(surface), surface_bytes_per_pixel(surface)));
52
53 if (surface->texture) {
54 return;
55 }
56
57 switch (surface_format(surface)) {
58 case PIXMAN_BE_b8g8r8x8:
59 case PIXMAN_BE_b8g8r8a8:
60 surface->glformat = GL_BGRA_EXT;
61 surface->gltype = GL_UNSIGNED_BYTE;
62 break;
63 case PIXMAN_BE_x8r8g8b8:
64 case PIXMAN_BE_a8r8g8b8:
65 surface->glformat = GL_RGBA;
66 surface->gltype = GL_UNSIGNED_BYTE;
67 break;
68 case PIXMAN_r5g6b5:
69 surface->glformat = GL_RGB;
70 surface->gltype = GL_UNSIGNED_SHORT_5_6_5;
71 break;
72 default:
73 g_assert_not_reached();
74 }
75
76 glGenTextures(1, &surface->texture);
77 glEnable(GL_TEXTURE_2D);
78 glBindTexture(GL_TEXTURE_2D, surface->texture);
79 glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT,
80 surface_stride(surface) / surface_bytes_per_pixel(surface));
81 if (epoxy_is_desktop_gl()) {
82 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
83 surface_width(surface),
84 surface_height(surface),
85 0, surface->glformat, surface->gltype,
86 surface_data(surface));
87 } else {
88 glTexImage2D(GL_TEXTURE_2D, 0, surface->glformat,
89 surface_width(surface),
90 surface_height(surface),
91 0, surface->glformat, surface->gltype,
92 surface_data(surface));
93 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_A, GL_ONE);
94 }
95
96 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
97 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
98 }
99
surface_gl_create_texture_from_fd(DisplaySurface * surface,int fd,GLuint * texture,GLuint * mem_obj)100 bool surface_gl_create_texture_from_fd(DisplaySurface *surface,
101 int fd, GLuint *texture,
102 GLuint *mem_obj)
103 {
104 unsigned long size = surface_stride(surface) * surface_height(surface);
105 GLenum err = glGetError();
106 *texture = 0;
107 *mem_obj = 0;
108
109 if (!epoxy_has_gl_extension("GL_EXT_memory_object") ||
110 !epoxy_has_gl_extension("GL_EXT_memory_object_fd")) {
111 error_report("spice: required OpenGL extensions not supported: "
112 "GL_EXT_memory_object and GL_EXT_memory_object_fd");
113 return false;
114 }
115
116 #ifdef GL_EXT_memory_object_fd
117 glCreateMemoryObjectsEXT(1, mem_obj);
118 glImportMemoryFdEXT(*mem_obj, size, GL_HANDLE_TYPE_OPAQUE_FD_EXT, fd);
119
120 err = glGetError();
121 if (err != GL_NO_ERROR) {
122 error_report("spice: cannot import memory object from fd");
123 goto cleanup_mem;
124 }
125
126 glGenTextures(1, texture);
127 glBindTexture(GL_TEXTURE_2D, *texture);
128 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_TILING_EXT, GL_LINEAR_TILING_EXT);
129 glTexStorageMem2DEXT(GL_TEXTURE_2D, 1, GL_RGBA8, surface_width(surface),
130 surface_height(surface), *mem_obj, 0);
131 err = glGetError();
132 if (err != GL_NO_ERROR) {
133 error_report("spice: cannot create texture from memory object");
134 goto cleanup_tex_and_mem;
135 }
136 return true;
137
138 cleanup_tex_and_mem:
139 glDeleteTextures(1, texture);
140 cleanup_mem:
141 glDeleteMemoryObjectsEXT(1, mem_obj);
142
143 #endif
144 return false;
145 }
146
surface_gl_update_texture(QemuGLShader * gls,DisplaySurface * surface,int x,int y,int w,int h)147 void surface_gl_update_texture(QemuGLShader *gls,
148 DisplaySurface *surface,
149 int x, int y, int w, int h)
150 {
151 uint8_t *data = (void *)surface_data(surface);
152
153 assert(gls);
154
155 if (surface->texture) {
156 glBindTexture(GL_TEXTURE_2D, surface->texture);
157 glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT,
158 surface_stride(surface)
159 / surface_bytes_per_pixel(surface));
160 glTexSubImage2D(GL_TEXTURE_2D, 0,
161 x, y, w, h,
162 surface->glformat, surface->gltype,
163 data + surface_stride(surface) * y
164 + surface_bytes_per_pixel(surface) * x);
165 }
166 }
167
surface_gl_render_texture(QemuGLShader * gls,DisplaySurface * surface)168 void surface_gl_render_texture(QemuGLShader *gls,
169 DisplaySurface *surface)
170 {
171 assert(gls);
172
173 glClearColor(0.1f, 0.1f, 0.1f, 0.0f);
174 glClear(GL_COLOR_BUFFER_BIT);
175
176 qemu_gl_run_texture_blit(gls, false);
177 }
178
surface_gl_destroy_texture(QemuGLShader * gls,DisplaySurface * surface)179 void surface_gl_destroy_texture(QemuGLShader *gls,
180 DisplaySurface *surface)
181 {
182 if (!surface || !surface->texture) {
183 return;
184 }
185 glDeleteTextures(1, &surface->texture);
186 surface->texture = 0;
187 #ifdef GL_EXT_memory_object_fd
188 if (surface->mem_obj) {
189 glDeleteMemoryObjectsEXT(1, &surface->mem_obj);
190 surface->mem_obj = 0;
191 }
192 #endif
193 }
194
surface_gl_setup_viewport(QemuGLShader * gls,DisplaySurface * surface,int ww,int wh)195 void surface_gl_setup_viewport(QemuGLShader *gls,
196 DisplaySurface *surface,
197 int ww, int wh)
198 {
199 int gw, gh, stripe;
200 float sw, sh;
201
202 assert(gls);
203
204 gw = surface_width(surface);
205 gh = surface_height(surface);
206
207 sw = (float)ww/gw;
208 sh = (float)wh/gh;
209 if (sw < sh) {
210 stripe = wh - wh*sw/sh;
211 glViewport(0, stripe / 2, ww, wh - stripe);
212 } else {
213 stripe = ww - ww*sh/sw;
214 glViewport(stripe / 2, 0, ww - stripe, wh);
215 }
216 }
217