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comparison render_sdl.c @ 1328:70faad89d491

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Add config file option to disable Open GL rendering
author Michael Pavone <pavone@retrodev.com>
date Sun, 23 Apr 2017 00:54:33 -0700
parents 071e761bcdcf
children baaf05fd64c4
comparison
equal deleted inserted replaced
1327:57637d17b59e 1328:70faad89d491
384 } 384 }
385 } 385 }
386 } 386 }
387 387
388 #ifndef DISABLE_OPENGL 388 #ifndef DISABLE_OPENGL
389 flags |= SDL_WINDOW_OPENGL; 389 char *gl_enabled_str = tern_find_path_default(config, "video\0gl\0", def, TVAL_PTR).ptrval;
390 SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5); 390 uint8_t gl_enabled = strcmp(gl_enabled_str, "off") != 0;
391 SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 5); 391 if (gl_enabled)
392 SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5); 392 {
393 SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0); 393 flags |= SDL_WINDOW_OPENGL;
394 SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1); 394 SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
395 SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 5);
396 SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
397 SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
398 SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
399 }
395 #endif 400 #endif
396 main_window = SDL_CreateWindow(title, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, width, height, flags); 401 main_window = SDL_CreateWindow(title, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, width, height, flags);
397 if (!main_window) { 402 if (!main_window) {
398 fatal_error("Unable to create SDL window: %s\n", SDL_GetError()); 403 fatal_error("Unable to create SDL window: %s\n", SDL_GetError());
399 } 404 }
400 #ifndef DISABLE_OPENGL 405 #ifndef DISABLE_OPENGL
401 main_context = SDL_GL_CreateContext(main_window); 406 if (gl_enabled)
402 GLenum res = glewInit(); 407 {
403 if (res != GLEW_OK) { 408 main_context = SDL_GL_CreateContext(main_window);
404 warning("Initialization of GLEW failed with code %d\n", res); 409 GLenum res = glewInit();
405 } 410 if (res != GLEW_OK) {
406 411 warning("Initialization of GLEW failed with code %d\n", res);
407 if (res == GLEW_OK && GLEW_VERSION_2_0) { 412 }
408 render_gl = 1; 413
409 if (!strcmp("tear", vsync)) { 414 if (res == GLEW_OK && GLEW_VERSION_2_0) {
410 if (SDL_GL_SetSwapInterval(-1) < 0) { 415 render_gl = 1;
411 warning("late tear is not available (%s), using normal vsync\n", SDL_GetError()); 416 if (!strcmp("tear", vsync)) {
412 vsync = "on"; 417 if (SDL_GL_SetSwapInterval(-1) < 0) {
413 } else { 418 warning("late tear is not available (%s), using normal vsync\n", SDL_GetError());
414 vsync = NULL; 419 vsync = "on";
415 } 420 } else {
416 } 421 vsync = NULL;
417 if (vsync) { 422 }
418 if (SDL_GL_SetSwapInterval(!strcmp("on", vsync)) < 0) { 423 }
419 warning("Failed to set vsync to %s: %s\n", vsync, SDL_GetError()); 424 if (vsync) {
420 } 425 if (SDL_GL_SetSwapInterval(!strcmp("on", vsync)) < 0) {
421 } 426 warning("Failed to set vsync to %s: %s\n", vsync, SDL_GetError());
422 } else { 427 }
423 warning("OpenGL 2.0 is unavailable, falling back to SDL2 renderer\n"); 428 }
429 } else {
430 warning("OpenGL 2.0 is unavailable, falling back to SDL2 renderer\n");
431 }
432 }
433 if (!render_gl) {
424 #endif 434 #endif
425 flags = SDL_RENDERER_ACCELERATED; 435 flags = SDL_RENDERER_ACCELERATED;
426 if (!strcmp("on", vsync) || !strcmp("tear", vsync)) { 436 if (!strcmp("on", vsync) || !strcmp("tear", vsync)) {
427 flags |= SDL_RENDERER_PRESENTVSYNC; 437 flags |= SDL_RENDERER_PRESENTVSYNC;
428 } 438 }