xref: /openbmc/qemu/ui/sdl2-gl.c (revision 9badf12a)
1 /*
2  * QEMU SDL display driver -- opengl support
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 
28 #include "qemu/osdep.h"
29 #include "ui/console.h"
30 #include "ui/input.h"
31 #include "ui/sdl2.h"
32 
sdl2_set_scanout_mode(struct sdl2_console * scon,bool scanout)33 static void sdl2_set_scanout_mode(struct sdl2_console *scon, bool scanout)
34 {
35     if (scon->scanout_mode == scanout) {
36         return;
37     }
38 
39     scon->scanout_mode = scanout;
40     if (!scon->scanout_mode) {
41         egl_fb_destroy(&scon->guest_fb);
42         if (scon->surface) {
43             surface_gl_destroy_texture(scon->gls, scon->surface);
44             surface_gl_create_texture(scon->gls, scon->surface);
45         }
46     }
47 }
48 
sdl2_gl_render_surface(struct sdl2_console * scon)49 static void sdl2_gl_render_surface(struct sdl2_console *scon)
50 {
51     int ww, wh;
52 
53     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
54     sdl2_set_scanout_mode(scon, false);
55 
56     SDL_GetWindowSize(scon->real_window, &ww, &wh);
57     surface_gl_setup_viewport(scon->gls, scon->surface, ww, wh);
58 
59     surface_gl_render_texture(scon->gls, scon->surface);
60     SDL_GL_SwapWindow(scon->real_window);
61 }
62 
sdl2_gl_update(DisplayChangeListener * dcl,int x,int y,int w,int h)63 void sdl2_gl_update(DisplayChangeListener *dcl,
64                     int x, int y, int w, int h)
65 {
66     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
67 
68     assert(scon->opengl);
69 
70     if (!scon->real_window) {
71         return;
72     }
73 
74     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
75     surface_gl_update_texture(scon->gls, scon->surface, x, y, w, h);
76     scon->updates++;
77 }
78 
sdl2_gl_switch(DisplayChangeListener * dcl,DisplaySurface * new_surface)79 void sdl2_gl_switch(DisplayChangeListener *dcl,
80                     DisplaySurface *new_surface)
81 {
82     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
83     DisplaySurface *old_surface = scon->surface;
84 
85     assert(scon->opengl);
86 
87     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
88     surface_gl_destroy_texture(scon->gls, scon->surface);
89 
90     scon->surface = new_surface;
91 
92     if (surface_is_placeholder(new_surface) && qemu_console_get_index(dcl->con)) {
93         qemu_gl_fini_shader(scon->gls);
94         scon->gls = NULL;
95         sdl2_window_destroy(scon);
96         return;
97     }
98 
99     if (!scon->real_window) {
100         sdl2_window_create(scon);
101         scon->gls = qemu_gl_init_shader();
102     } else if (old_surface &&
103                ((surface_width(old_surface)  != surface_width(new_surface)) ||
104                 (surface_height(old_surface) != surface_height(new_surface)))) {
105         sdl2_window_resize(scon);
106     }
107 
108     surface_gl_create_texture(scon->gls, scon->surface);
109 }
110 
sdl2_gl_refresh(DisplayChangeListener * dcl)111 void sdl2_gl_refresh(DisplayChangeListener *dcl)
112 {
113     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
114 
115     assert(scon->opengl);
116 
117     graphic_hw_update(dcl->con);
118     if (scon->updates && scon->real_window) {
119         scon->updates = 0;
120         sdl2_gl_render_surface(scon);
121     }
122     sdl2_poll_events(scon);
123 }
124 
sdl2_gl_redraw(struct sdl2_console * scon)125 void sdl2_gl_redraw(struct sdl2_console *scon)
126 {
127     assert(scon->opengl);
128 
129     if (scon->scanout_mode) {
130         /* sdl2_gl_scanout_flush actually only care about
131          * the first argument. */
132         return sdl2_gl_scanout_flush(&scon->dcl, 0, 0, 0, 0);
133     }
134     if (scon->surface) {
135         sdl2_gl_render_surface(scon);
136     }
137 }
138 
sdl2_gl_create_context(DisplayGLCtx * dgc,QEMUGLParams * params)139 QEMUGLContext sdl2_gl_create_context(DisplayGLCtx *dgc,
140                                      QEMUGLParams *params)
141 {
142     struct sdl2_console *scon = container_of(dgc, struct sdl2_console, dgc);
143     SDL_GLContext ctx;
144 
145     assert(scon->opengl);
146 
147     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
148 
149     SDL_GL_SetAttribute(SDL_GL_SHARE_WITH_CURRENT_CONTEXT, 1);
150     if (scon->opts->gl == DISPLAYGL_MODE_ON ||
151         scon->opts->gl == DISPLAYGL_MODE_CORE) {
152         SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK,
153                             SDL_GL_CONTEXT_PROFILE_CORE);
154     } else if (scon->opts->gl == DISPLAYGL_MODE_ES) {
155         SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK,
156                             SDL_GL_CONTEXT_PROFILE_ES);
157     }
158     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, params->major_ver);
159     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, params->minor_ver);
160 
161     ctx = SDL_GL_CreateContext(scon->real_window);
162 
163     /* If SDL fail to create a GL context and we use the "on" flag,
164      * then try to fallback to GLES.
165      */
166     if (!ctx && scon->opts->gl == DISPLAYGL_MODE_ON) {
167         SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK,
168                             SDL_GL_CONTEXT_PROFILE_ES);
169         ctx = SDL_GL_CreateContext(scon->real_window);
170     }
171     return (QEMUGLContext)ctx;
172 }
173 
sdl2_gl_destroy_context(DisplayGLCtx * dgc,QEMUGLContext ctx)174 void sdl2_gl_destroy_context(DisplayGLCtx *dgc, QEMUGLContext ctx)
175 {
176     SDL_GLContext sdlctx = (SDL_GLContext)ctx;
177 
178     SDL_GL_DeleteContext(sdlctx);
179 }
180 
sdl2_gl_make_context_current(DisplayGLCtx * dgc,QEMUGLContext ctx)181 int sdl2_gl_make_context_current(DisplayGLCtx *dgc,
182                                  QEMUGLContext ctx)
183 {
184     struct sdl2_console *scon = container_of(dgc, struct sdl2_console, dgc);
185     SDL_GLContext sdlctx = (SDL_GLContext)ctx;
186 
187     assert(scon->opengl);
188 
189     return SDL_GL_MakeCurrent(scon->real_window, sdlctx);
190 }
191 
sdl2_gl_scanout_disable(DisplayChangeListener * dcl)192 void sdl2_gl_scanout_disable(DisplayChangeListener *dcl)
193 {
194     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
195 
196     assert(scon->opengl);
197     scon->w = 0;
198     scon->h = 0;
199     sdl2_set_scanout_mode(scon, false);
200 }
201 
sdl2_gl_scanout_texture(DisplayChangeListener * dcl,uint32_t backing_id,bool backing_y_0_top,uint32_t backing_width,uint32_t backing_height,uint32_t x,uint32_t y,uint32_t w,uint32_t h,void * d3d_tex2d)202 void sdl2_gl_scanout_texture(DisplayChangeListener *dcl,
203                              uint32_t backing_id,
204                              bool backing_y_0_top,
205                              uint32_t backing_width,
206                              uint32_t backing_height,
207                              uint32_t x, uint32_t y,
208                              uint32_t w, uint32_t h,
209                              void *d3d_tex2d)
210 {
211     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
212 
213     assert(scon->opengl);
214     scon->x = x;
215     scon->y = y;
216     scon->w = w;
217     scon->h = h;
218     scon->y0_top = backing_y_0_top;
219 
220     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
221 
222     sdl2_set_scanout_mode(scon, true);
223     egl_fb_setup_for_tex(&scon->guest_fb, backing_width, backing_height,
224                          backing_id, false);
225 }
226 
sdl2_gl_scanout_flush(DisplayChangeListener * dcl,uint32_t x,uint32_t y,uint32_t w,uint32_t h)227 void sdl2_gl_scanout_flush(DisplayChangeListener *dcl,
228                            uint32_t x, uint32_t y, uint32_t w, uint32_t h)
229 {
230     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
231     int ww, wh;
232 
233     assert(scon->opengl);
234     if (!scon->scanout_mode) {
235         return;
236     }
237     if (!scon->guest_fb.framebuffer) {
238         return;
239     }
240 
241     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
242 
243     SDL_GetWindowSize(scon->real_window, &ww, &wh);
244     egl_fb_setup_default(&scon->win_fb, ww, wh);
245     egl_fb_blit(&scon->win_fb, &scon->guest_fb, !scon->y0_top);
246 
247     SDL_GL_SwapWindow(scon->real_window);
248 }
249