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 "qemu-common.h" 30 #include "ui/console.h" 31 #include "ui/input.h" 32 #include "ui/sdl2.h" 33 #include "sysemu/sysemu.h" 34 35 #include <epoxy/gl.h> 36 37 static void sdl2_set_scanout_mode(struct sdl2_console *scon, bool scanout) 38 { 39 if (scon->scanout_mode == scanout) { 40 return; 41 } 42 43 scon->scanout_mode = scanout; 44 if (!scon->scanout_mode) { 45 if (scon->fbo_id) { 46 glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, 47 GL_COLOR_ATTACHMENT0_EXT, 48 GL_TEXTURE_2D, 0, 0); 49 glDeleteFramebuffers(1, &scon->fbo_id); 50 glBindFramebuffer(GL_FRAMEBUFFER_EXT, 0); 51 scon->fbo_id = 0; 52 } 53 if (scon->surface) { 54 surface_gl_destroy_texture(scon->gls, scon->surface); 55 surface_gl_create_texture(scon->gls, scon->surface); 56 } 57 } 58 } 59 60 static void sdl2_gl_render_surface(struct sdl2_console *scon) 61 { 62 int ww, wh; 63 64 SDL_GL_MakeCurrent(scon->real_window, scon->winctx); 65 sdl2_set_scanout_mode(scon, false); 66 67 SDL_GetWindowSize(scon->real_window, &ww, &wh); 68 surface_gl_setup_viewport(scon->gls, scon->surface, ww, wh); 69 70 surface_gl_render_texture(scon->gls, scon->surface); 71 SDL_GL_SwapWindow(scon->real_window); 72 } 73 74 void sdl2_gl_update(DisplayChangeListener *dcl, 75 int x, int y, int w, int h) 76 { 77 struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl); 78 79 assert(scon->opengl); 80 81 SDL_GL_MakeCurrent(scon->real_window, scon->winctx); 82 surface_gl_update_texture(scon->gls, scon->surface, x, y, w, h); 83 scon->updates++; 84 } 85 86 void sdl2_gl_switch(DisplayChangeListener *dcl, 87 DisplaySurface *new_surface) 88 { 89 struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl); 90 DisplaySurface *old_surface = scon->surface; 91 92 assert(scon->opengl); 93 94 SDL_GL_MakeCurrent(scon->real_window, scon->winctx); 95 surface_gl_destroy_texture(scon->gls, scon->surface); 96 97 scon->surface = new_surface; 98 99 if (!new_surface) { 100 console_gl_fini_context(scon->gls); 101 scon->gls = NULL; 102 sdl2_window_destroy(scon); 103 return; 104 } 105 106 if (!scon->real_window) { 107 sdl2_window_create(scon); 108 scon->gls = console_gl_init_context(); 109 } else if (old_surface && 110 ((surface_width(old_surface) != surface_width(new_surface)) || 111 (surface_height(old_surface) != surface_height(new_surface)))) { 112 sdl2_window_resize(scon); 113 } 114 115 surface_gl_create_texture(scon->gls, scon->surface); 116 } 117 118 void sdl2_gl_refresh(DisplayChangeListener *dcl) 119 { 120 struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl); 121 122 assert(scon->opengl); 123 124 graphic_hw_update(dcl->con); 125 if (scon->updates && scon->surface) { 126 scon->updates = 0; 127 sdl2_gl_render_surface(scon); 128 } 129 sdl2_poll_events(scon); 130 } 131 132 void sdl2_gl_redraw(struct sdl2_console *scon) 133 { 134 assert(scon->opengl); 135 136 if (scon->surface) { 137 sdl2_gl_render_surface(scon); 138 } 139 } 140 141 QEMUGLContext sdl2_gl_create_context(DisplayChangeListener *dcl, 142 QEMUGLParams *params) 143 { 144 struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl); 145 SDL_GLContext ctx; 146 147 assert(scon->opengl); 148 149 SDL_GL_MakeCurrent(scon->real_window, scon->winctx); 150 151 SDL_GL_SetAttribute(SDL_GL_SHARE_WITH_CURRENT_CONTEXT, 1); 152 SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, 153 SDL_GL_CONTEXT_PROFILE_CORE); 154 SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, params->major_ver); 155 SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, params->minor_ver); 156 157 ctx = SDL_GL_CreateContext(scon->real_window); 158 return (QEMUGLContext)ctx; 159 } 160 161 void sdl2_gl_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx) 162 { 163 SDL_GLContext sdlctx = (SDL_GLContext)ctx; 164 165 SDL_GL_DeleteContext(sdlctx); 166 } 167 168 int sdl2_gl_make_context_current(DisplayChangeListener *dcl, 169 QEMUGLContext ctx) 170 { 171 struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl); 172 SDL_GLContext sdlctx = (SDL_GLContext)ctx; 173 174 assert(scon->opengl); 175 176 return SDL_GL_MakeCurrent(scon->real_window, sdlctx); 177 } 178 179 QEMUGLContext sdl2_gl_get_current_context(DisplayChangeListener *dcl) 180 { 181 SDL_GLContext sdlctx; 182 183 sdlctx = SDL_GL_GetCurrentContext(); 184 return (QEMUGLContext)sdlctx; 185 } 186 187 void sdl2_gl_scanout(DisplayChangeListener *dcl, 188 uint32_t backing_id, bool backing_y_0_top, 189 uint32_t x, uint32_t y, 190 uint32_t w, uint32_t h) 191 { 192 struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl); 193 194 assert(scon->opengl); 195 scon->x = x; 196 scon->y = y; 197 scon->w = w; 198 scon->h = h; 199 scon->tex_id = backing_id; 200 scon->y0_top = backing_y_0_top; 201 202 SDL_GL_MakeCurrent(scon->real_window, scon->winctx); 203 204 if (scon->tex_id == 0 || scon->w == 0 || scon->h == 0) { 205 sdl2_set_scanout_mode(scon, false); 206 return; 207 } 208 209 sdl2_set_scanout_mode(scon, true); 210 if (!scon->fbo_id) { 211 glGenFramebuffers(1, &scon->fbo_id); 212 } 213 214 glBindFramebuffer(GL_FRAMEBUFFER_EXT, scon->fbo_id); 215 glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, 216 GL_TEXTURE_2D, scon->tex_id, 0); 217 } 218 219 void sdl2_gl_scanout_flush(DisplayChangeListener *dcl, 220 uint32_t x, uint32_t y, uint32_t w, uint32_t h) 221 { 222 struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl); 223 int ww, wh, y1, y2; 224 225 assert(scon->opengl); 226 if (!scon->scanout_mode) { 227 return; 228 } 229 if (!scon->fbo_id) { 230 return; 231 } 232 233 SDL_GL_MakeCurrent(scon->real_window, scon->winctx); 234 235 glBindFramebuffer(GL_READ_FRAMEBUFFER, scon->fbo_id); 236 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0); 237 238 SDL_GetWindowSize(scon->real_window, &ww, &wh); 239 glViewport(0, 0, ww, wh); 240 y1 = scon->y0_top ? 0 : scon->h; 241 y2 = scon->y0_top ? scon->h : 0; 242 glBlitFramebuffer(0, y1, scon->w, y2, 243 0, 0, ww, wh, 244 GL_COLOR_BUFFER_BIT, GL_NEAREST); 245 glBindFramebuffer(GL_FRAMEBUFFER_EXT, scon->fbo_id); 246 247 SDL_GL_SwapWindow(scon->real_window); 248 } 249