mirror of https://github.com/aap/librw.git
Get the SDL2 backend working again
This commit is contained in:
Cameron Cawley
parent
9c578580ec
commit
366f909bc7
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@ -25,32 +25,35 @@
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namespace rw {
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namespace gl3 {
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#ifndef LIBRW_SDL2
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struct DisplayMode
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{
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#ifdef LIBRW_SDL2
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SDL_DisplayMode mode;
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#else
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GLFWvidmode mode;
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#endif
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int32 depth;
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uint32 flags;
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};
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#endif
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struct GlGlobals
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{
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#ifdef LIBRW_SDL2
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SDL_Window **pWindow;
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SDL_Window *window;
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SDL_GLContext glcontext;
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#else
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GLFWwindow **pWindow;
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GLFWwindow *window;
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GLFWmonitor *monitor;
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int numMonitors;
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int currentMonitor;
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#endif
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DisplayMode *modes;
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int numModes;
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int currentMode;
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GLFWwindow **pWindow;
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#endif
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int presentWidth, presentHeight;
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int presentOffX, presentOffY;
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@ -1434,6 +1437,10 @@ showRaster(Raster *raster, uint32 flags)
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{
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// TODO: do this properly!
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#ifdef LIBRW_SDL2
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if(flags & Raster::FLIPWAITVSYNCH)
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SDL_GL_SetSwapInterval(1);
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else
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SDL_GL_SetSwapInterval(0);
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SDL_GL_SwapWindow(glGlobals.window);
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#else
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if(flags & Raster::FLIPWAITVSYNCH)
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@ -1471,70 +1478,164 @@ rasterRenderFast(Raster *raster, int32 x, int32 y)
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}
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#ifdef LIBRW_SDL2
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static void
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addVideoMode(int displayIndex, int modeIndex)
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{
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int i;
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SDL_DisplayMode mode;
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SDL_GetDisplayMode(displayIndex, modeIndex, &mode);
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for(i = 1; i < glGlobals.numModes; i++){
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if(glGlobals.modes[i].mode.w == mode.w &&
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glGlobals.modes[i].mode.h == mode.h &&
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glGlobals.modes[i].mode.format == mode.format){
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// had this mode already, remember highest refresh rate
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if(mode.refresh_rate > glGlobals.modes[i].mode.refresh_rate)
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glGlobals.modes[i].mode.refresh_rate = mode.refresh_rate;
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return;
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}
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}
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// none found, add
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glGlobals.modes[glGlobals.numModes].mode = mode;
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glGlobals.modes[glGlobals.numModes].flags = VIDEOMODEEXCLUSIVE;
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glGlobals.numModes++;
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}
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static void
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makeVideoModeList(int displayIndex)
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{
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int i, num, depth;
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num = SDL_GetNumDisplayModes(displayIndex);
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rwFree(glGlobals.modes);
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glGlobals.modes = rwNewT(DisplayMode, num+1, ID_DRIVER | MEMDUR_EVENT);
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SDL_GetCurrentDisplayMode(displayIndex, &glGlobals.modes[0].mode);
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glGlobals.modes[0].flags = 0;
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glGlobals.numModes = 1;
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for(i = 0; i < num; i++)
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addVideoMode(displayIndex, i);
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for(i = 0; i < glGlobals.numModes; i++){
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depth = SDL_BITSPERPIXEL(glGlobals.modes[i].mode.format);
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// set depth to power of two
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for(glGlobals.modes[i].depth = 1; glGlobals.modes[i].depth < depth; glGlobals.modes[i].depth <<= 1);
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}
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}
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static int
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openSDL2(EngineOpenParams *openparams)
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{
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if (!openparams){
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RWERROR((ERR_GENERAL, "openparams invalid"));
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return 0;
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}
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glGlobals.winWidth = openparams->width;
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glGlobals.winHeight = openparams->height;
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glGlobals.winTitle = openparams->windowtitle;
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glGlobals.pWindow = openparams->window;
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GLenum status;
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SDL_Window *win;
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SDL_GLContext ctx;
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memset(&gl3Caps, 0, sizeof(gl3Caps));
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/* Init SDL */
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if(SDL_InitSubSystem(SDL_INIT_VIDEO)){
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RWERROR((ERR_ENGINEOPEN, SDL_GetError()));
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RWERROR((ERR_GENERAL, SDL_GetError()));
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return 0;
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}
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SDL_ClearHints();
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 3);
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SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES, 0);
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, SDL_GL_CONTEXT_FORWARD_COMPATIBLE_FLAG);
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
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int flags = SDL_WINDOW_RESIZABLE | SDL_WINDOW_OPENGL;
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if (openparams->fullscreen)
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flags |= SDL_WINDOW_FULLSCREEN;
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win = SDL_CreateWindow(openparams->windowtitle, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, openparams->width, openparams->height, flags);
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if(win == nil){
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RWERROR((ERR_ENGINEOPEN, SDL_GetError()));
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SDL_QuitSubSystem(SDL_INIT_VIDEO);
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return 0;
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}
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ctx = SDL_GL_CreateContext(win);
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makeVideoModeList(0);
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/* Init GLEW */
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glewExperimental = GL_TRUE;
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status = glewInit();
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if(status != GLEW_OK){
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RWERROR((ERR_ENGINEOPEN, glewGetErrorString(status)));
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SDL_GL_DeleteContext(ctx);
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SDL_DestroyWindow(win);
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SDL_QuitSubSystem(SDL_INIT_VIDEO);
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return 0;
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}
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if(!GLEW_VERSION_3_3){
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RWERROR((ERR_VERSION, "OpenGL 3.3 needed"));
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SDL_GL_DeleteContext(ctx);
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SDL_DestroyWindow(win);
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SDL_QuitSubSystem(SDL_INIT_VIDEO);
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return 0;
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}
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glGlobals.window = win;
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glGlobals.glcontext = ctx;
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*openparams->window = win;
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return 1;
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}
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static int
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closeSDL2(void)
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{
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SDL_QuitSubSystem(SDL_INIT_VIDEO);
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return 1;
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}
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static struct {
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int gl;
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int major, minor;
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} profiles[] = {
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{ SDL_GL_CONTEXT_PROFILE_CORE, 3, 3 },
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{ SDL_GL_CONTEXT_PROFILE_CORE, 2, 1 },
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{ SDL_GL_CONTEXT_PROFILE_ES, 3, 1 },
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{ SDL_GL_CONTEXT_PROFILE_ES, 2, 0 },
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{ 0, 0, 0 },
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};
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static int
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startSDL2(void)
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{
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GLenum status;
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SDL_Window *win;
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SDL_GLContext ctx;
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DisplayMode *mode;
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mode = &glGlobals.modes[glGlobals.currentMode];
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SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES, glGlobals.numSamples);
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int i;
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for(i = 0; profiles[i].gl; i++){
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, profiles[i].gl);
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, profiles[i].major);
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, profiles[i].minor);
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if(mode->flags & VIDEOMODEEXCLUSIVE) {
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win = SDL_CreateWindow(glGlobals.winTitle, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, mode->mode.w, mode->mode.h, SDL_WINDOW_RESIZABLE | SDL_WINDOW_OPENGL | SDL_WINDOW_FULLSCREEN);
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if (win)
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SDL_SetWindowDisplayMode(win, &mode->mode);
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} else {
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win = SDL_CreateWindow(glGlobals.winTitle, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, glGlobals.winWidth, glGlobals.winHeight, SDL_WINDOW_RESIZABLE | SDL_WINDOW_OPENGL);
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if (win)
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SDL_SetWindowDisplayMode(win, NULL);
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}
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if(win){
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gl3Caps.gles = profiles[i].gl == SDL_GL_CONTEXT_PROFILE_ES;
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gl3Caps.glversion = profiles[i].major*10 + profiles[i].minor;
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break;
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}
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}
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if(win == nil){
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RWERROR((ERR_GENERAL, SDL_GetError()));
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return 0;
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}
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ctx = SDL_GL_CreateContext(win);
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printf("OpenGL version: %s\n", glGetString(GL_VERSION));
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/* Init GLEW */
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glewExperimental = GL_TRUE;
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status = glewInit();
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if(status != GLEW_OK){
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RWERROR((ERR_GENERAL, glewGetErrorString(status)));
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SDL_GL_DeleteContext(ctx);
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SDL_DestroyWindow(win);
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return 0;
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}
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if(!GLEW_VERSION_3_3){
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RWERROR((ERR_GENERAL, "OpenGL 3.3 needed"));
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SDL_GL_DeleteContext(ctx);
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SDL_DestroyWindow(win);
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return 0;
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}
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glGlobals.window = win;
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glGlobals.glcontext = ctx;
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*glGlobals.pWindow = win;
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glGlobals.presentWidth = 0;
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glGlobals.presentHeight = 0;
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glGlobals.presentOffX = 0;
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glGlobals.presentOffY = 0;
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return 1;
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}
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static int
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stopSDL2(void)
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{
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SDL_GL_DeleteContext(glGlobals.glcontext);
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SDL_DestroyWindow(glGlobals.window);
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SDL_QuitSubSystem(SDL_INIT_VIDEO);
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return 1;
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}
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#else
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@ -1831,6 +1932,8 @@ finalizeOpenGL(void)
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static int
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deviceSystemSDL2(DeviceReq req, void *arg, int32 n)
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{
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VideoMode *rwmode;
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switch(req){
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case DEVICEOPEN:
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return openSDL2((EngineOpenParams*)arg);
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@ -1838,12 +1941,50 @@ deviceSystemSDL2(DeviceReq req, void *arg, int32 n)
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return closeSDL2();
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case DEVICEINIT:
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return initOpenGL();
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return startSDL2() && initOpenGL();
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case DEVICETERM:
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return termOpenGL();
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return termOpenGL() && stopSDL2();
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// TODO: implement subsystems and video modes
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case DEVICEFINALIZE:
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return finalizeOpenGL();
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// TODO: implement subsystems
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case DEVICEGETNUMVIDEOMODES:
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return glGlobals.numModes;
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case DEVICEGETCURRENTVIDEOMODE:
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return glGlobals.currentMode;
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case DEVICESETVIDEOMODE:
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if(n >= glGlobals.numModes)
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return 0;
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glGlobals.currentMode = n;
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return 1;
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case DEVICEGETVIDEOMODEINFO:
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rwmode = (VideoMode*)arg;
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rwmode->width = glGlobals.modes[n].mode.w;
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rwmode->height = glGlobals.modes[n].mode.h;
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rwmode->depth = glGlobals.modes[n].depth;
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rwmode->flags = glGlobals.modes[n].flags;
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return 1;
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case DEVICEGETMAXMULTISAMPLINGLEVELS:
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{
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GLint maxSamples;
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glGetIntegerv(GL_MAX_SAMPLES, &maxSamples);
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if(maxSamples == 0)
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return 1;
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return maxSamples;
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}
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case DEVICEGETMULTISAMPLINGLEVELS:
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if(glGlobals.numSamples == 0)
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return 1;
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return glGlobals.numSamples;
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case DEVICESETMULTISAMPLINGLEVELS:
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glGlobals.numSamples = (uint32)n;
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return 1;
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default:
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assert(0 && "not implemented");
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return 0;
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