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-common.h" 29 #include "ui/console.h" 30 #include "ui/input.h" 31 #include "ui/sdl2.h" 32 #include "sysemu/sysemu.h" 33 34 #include <epoxy/gl.h> 35 36 static void sdl2_set_scanout_mode(struct sdl2_console *scon, bool scanout) 37 { 38 if (scon->scanout_mode == scanout) { 39 return; 40 } 41 42 scon->scanout_mode = scanout; 43 if (!scon->scanout_mode) { 44 if (scon->fbo_id) { 45 glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, 46 GL_COLOR_ATTACHMENT0_EXT, 47 GL_TEXTURE_2D, 0, 0); 48 glDeleteFramebuffers(1, &scon->fbo_id); 49 glBindFramebuffer(GL_FRAMEBUFFER_EXT, 0); 50 scon->fbo_id = 0; 51 } 52 if (scon->surface) { 53 surface_gl_destroy_texture(scon->gls, scon->surface); 54 surface_gl_create_texture(scon->gls, scon->surface); 55 } 56 } 57 } 58 59 static void sdl2_gl_render_surface(struct sdl2_console *scon) 60 { 61 int ww, wh; 62 63 SDL_GL_MakeCurrent(scon->real_window, scon->winctx); 64 sdl2_set_scanout_mode(scon, false); 65 66 SDL_GetWindowSize(scon->real_window, &ww, &wh); 67 surface_gl_setup_viewport(scon->gls, scon->surface, ww, wh); 68 69 surface_gl_render_texture(scon->gls, scon->surface); 70 SDL_GL_SwapWindow(scon->real_window); 71 } 72 73 void sdl2_gl_update(DisplayChangeListener *dcl, 74 int x, int y, int w, int h) 75 { 76 struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl); 77 78 assert(scon->opengl); 79 80 SDL_GL_MakeCurrent(scon->real_window, scon->winctx); 81 surface_gl_update_texture(scon->gls, scon->surface, x, y, w, h); 82 scon->updates++; 83 } 84 85 void sdl2_gl_switch(DisplayChangeListener *dcl, 86 DisplaySurface *new_surface) 87 { 88 struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl); 89 DisplaySurface *old_surface = scon->surface; 90 91 assert(scon->opengl); 92 93 SDL_GL_MakeCurrent(scon->real_window, scon->winctx); 94 surface_gl_destroy_texture(scon->gls, scon->surface); 95 96 scon->surface = new_surface; 97 98 if (!new_surface) { 99 console_gl_fini_context(scon->gls); 100 scon->gls = NULL; 101 sdl2_window_destroy(scon); 102 return; 103 } 104 105 if (!scon->real_window) { 106 sdl2_window_create(scon); 107 scon->gls = console_gl_init_context(); 108 } else if (old_surface && 109 ((surface_width(old_surface) != surface_width(new_surface)) || 110 (surface_height(old_surface) != surface_height(new_surface)))) { 111 sdl2_window_resize(scon); 112 } 113 114 surface_gl_create_texture(scon->gls, scon->surface); 115 } 116 117 void sdl2_gl_refresh(DisplayChangeListener *dcl) 118 { 119 struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl); 120 121 assert(scon->opengl); 122 123 graphic_hw_update(dcl->con); 124 if (scon->updates && scon->surface) { 125 scon->updates = 0; 126 sdl2_gl_render_surface(scon); 127 } 128 sdl2_poll_events(scon); 129 } 130 131 void sdl2_gl_redraw(struct sdl2_console *scon) 132 { 133 assert(scon->opengl); 134 135 if (scon->surface) { 136 sdl2_gl_render_surface(scon); 137 } 138 } 139 140 QEMUGLContext sdl2_gl_create_context(DisplayChangeListener *dcl, 141 QEMUGLParams *params) 142 { 143 struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl); 144 SDL_GLContext ctx; 145 146 assert(scon->opengl); 147 148 SDL_GL_MakeCurrent(scon->real_window, scon->winctx); 149 150 SDL_GL_SetAttribute(SDL_GL_SHARE_WITH_CURRENT_CONTEXT, 1); 151 SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, 152 SDL_GL_CONTEXT_PROFILE_CORE); 153 SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, params->major_ver); 154 SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, params->minor_ver); 155 156 ctx = SDL_GL_CreateContext(scon->real_window); 157 return (QEMUGLContext)ctx; 158 } 159 160 void sdl2_gl_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx) 161 { 162 SDL_GLContext sdlctx = (SDL_GLContext)ctx; 163 164 SDL_GL_DeleteContext(sdlctx); 165 } 166 167 int sdl2_gl_make_context_current(DisplayChangeListener *dcl, 168 QEMUGLContext ctx) 169 { 170 struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl); 171 SDL_GLContext sdlctx = (SDL_GLContext)ctx; 172 173 assert(scon->opengl); 174 175 return SDL_GL_MakeCurrent(scon->real_window, sdlctx); 176 } 177 178 QEMUGLContext sdl2_gl_get_current_context(DisplayChangeListener *dcl) 179 { 180 SDL_GLContext sdlctx; 181 182 sdlctx = SDL_GL_GetCurrentContext(); 183 return (QEMUGLContext)sdlctx; 184 } 185 186 void sdl2_gl_scanout(DisplayChangeListener *dcl, 187 uint32_t backing_id, bool backing_y_0_top, 188 uint32_t x, uint32_t y, 189 uint32_t w, uint32_t h) 190 { 191 struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl); 192 193 assert(scon->opengl); 194 scon->x = x; 195 scon->y = y; 196 scon->w = w; 197 scon->h = h; 198 scon->tex_id = backing_id; 199 scon->y0_top = backing_y_0_top; 200 201 SDL_GL_MakeCurrent(scon->real_window, scon->winctx); 202 203 if (scon->tex_id == 0 || scon->w == 0 || scon->h == 0) { 204 sdl2_set_scanout_mode(scon, false); 205 return; 206 } 207 208 sdl2_set_scanout_mode(scon, true); 209 if (!scon->fbo_id) { 210 glGenFramebuffers(1, &scon->fbo_id); 211 } 212 213 glBindFramebuffer(GL_FRAMEBUFFER_EXT, scon->fbo_id); 214 glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, 215 GL_TEXTURE_2D, scon->tex_id, 0); 216 } 217 218 void sdl2_gl_scanout_flush(DisplayChangeListener *dcl, 219 uint32_t x, uint32_t y, uint32_t w, uint32_t h) 220 { 221 struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl); 222 int ww, wh, y1, y2; 223 224 assert(scon->opengl); 225 if (!scon->scanout_mode) { 226 return; 227 } 228 if (!scon->fbo_id) { 229 return; 230 } 231 232 SDL_GL_MakeCurrent(scon->real_window, scon->winctx); 233 234 glBindFramebuffer(GL_READ_FRAMEBUFFER, scon->fbo_id); 235 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0); 236 237 SDL_GetWindowSize(scon->real_window, &ww, &wh); 238 glViewport(0, 0, ww, wh); 239 y1 = scon->y0_top ? 0 : scon->h; 240 y2 = scon->y0_top ? scon->h : 0; 241 glBlitFramebuffer(0, y1, scon->w, y2, 242 0, 0, ww, wh, 243 GL_COLOR_BUFFER_BIT, GL_NEAREST); 244 glBindFramebuffer(GL_FRAMEBUFFER_EXT, scon->fbo_id); 245 246 SDL_GL_SwapWindow(scon->real_window); 247 } 248