src/video/emscripten/SDL_emscriptenvideo.c
changeset 9278 8900afb78a19
child 9294 1865bd71ef12
     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/video/emscripten/SDL_emscriptenvideo.c	Thu Dec 18 00:19:52 2014 -0500
     1.3 @@ -0,0 +1,320 @@
     1.4 +/*
     1.5 +  Simple DirectMedia Layer
     1.6 +  Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
     1.7 +
     1.8 +  This software is provided 'as-is', without any express or implied
     1.9 +  warranty.  In no event will the authors be held liable for any damages
    1.10 +  arising from the use of this software.
    1.11 +
    1.12 +  Permission is granted to anyone to use this software for any purpose,
    1.13 +  including commercial applications, and to alter it and redistribute it
    1.14 +  freely, subject to the following restrictions:
    1.15 +
    1.16 +  1. The origin of this software must not be misrepresented; you must not
    1.17 +     claim that you wrote the original software. If you use this software
    1.18 +     in a product, an acknowledgment in the product documentation would be
    1.19 +     appreciated but is not required.
    1.20 +  2. Altered source versions must be plainly marked as such, and must not be
    1.21 +     misrepresented as being the original software.
    1.22 +  3. This notice may not be removed or altered from any source distribution.
    1.23 +*/
    1.24 +#include "../../SDL_internal.h"
    1.25 +
    1.26 +#if SDL_VIDEO_DRIVER_EMSCRIPTEN
    1.27 +
    1.28 +#include "SDL_video.h"
    1.29 +#include "SDL_mouse.h"
    1.30 +#include "../SDL_sysvideo.h"
    1.31 +#include "../SDL_pixels_c.h"
    1.32 +#include "../SDL_egl_c.h"
    1.33 +#include "../../events/SDL_events_c.h"
    1.34 +
    1.35 +#include "SDL_emscriptenvideo.h"
    1.36 +#include "SDL_emscriptenopengles.h"
    1.37 +#include "SDL_emscriptenframebuffer.h"
    1.38 +#include "SDL_emscriptenevents.h"
    1.39 +#include "SDL_emscriptenmouse.h"
    1.40 +
    1.41 +#define EMSCRIPTENVID_DRIVER_NAME "emscripten"
    1.42 +
    1.43 +/* Initialization/Query functions */
    1.44 +static int Emscripten_VideoInit(_THIS);
    1.45 +static int Emscripten_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode);
    1.46 +static void Emscripten_VideoQuit(_THIS);
    1.47 +
    1.48 +static int Emscripten_CreateWindow(_THIS, SDL_Window * window);
    1.49 +static void Emscripten_SetWindowSize(_THIS, SDL_Window * window);
    1.50 +static void Emscripten_DestroyWindow(_THIS, SDL_Window * window);
    1.51 +static void Emscripten_SetWindowFullscreen(_THIS, SDL_Window * window, SDL_VideoDisplay * display, SDL_bool fullscreen);
    1.52 +static void Emscripten_PumpEvents(_THIS);
    1.53 +
    1.54 +
    1.55 +/* Emscripten driver bootstrap functions */
    1.56 +
    1.57 +static int
    1.58 +Emscripten_Available(void)
    1.59 +{
    1.60 +    return (1);
    1.61 +}
    1.62 +
    1.63 +static void
    1.64 +Emscripten_DeleteDevice(SDL_VideoDevice * device)
    1.65 +{
    1.66 +    SDL_free(device);
    1.67 +}
    1.68 +
    1.69 +static SDL_VideoDevice *
    1.70 +Emscripten_CreateDevice(int devindex)
    1.71 +{
    1.72 +    SDL_VideoDevice *device;
    1.73 +
    1.74 +    /* Initialize all variables that we clean on shutdown */
    1.75 +    device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
    1.76 +    if (!device) {
    1.77 +        SDL_OutOfMemory();
    1.78 +        SDL_free(device);
    1.79 +        return (0);
    1.80 +    }
    1.81 +
    1.82 +    /* Set the function pointers */
    1.83 +    device->VideoInit = Emscripten_VideoInit;
    1.84 +    device->VideoQuit = Emscripten_VideoQuit;
    1.85 +    device->SetDisplayMode = Emscripten_SetDisplayMode;
    1.86 +
    1.87 +
    1.88 +    device->PumpEvents = Emscripten_PumpEvents;
    1.89 +
    1.90 +    device->CreateWindow = Emscripten_CreateWindow;
    1.91 +    /*device->CreateWindowFrom = Emscripten_CreateWindowFrom;
    1.92 +    device->SetWindowTitle = Emscripten_SetWindowTitle;
    1.93 +    device->SetWindowIcon = Emscripten_SetWindowIcon;
    1.94 +    device->SetWindowPosition = Emscripten_SetWindowPosition;*/
    1.95 +    device->SetWindowSize = Emscripten_SetWindowSize;
    1.96 +    /*device->ShowWindow = Emscripten_ShowWindow;
    1.97 +    device->HideWindow = Emscripten_HideWindow;
    1.98 +    device->RaiseWindow = Emscripten_RaiseWindow;
    1.99 +    device->MaximizeWindow = Emscripten_MaximizeWindow;
   1.100 +    device->MinimizeWindow = Emscripten_MinimizeWindow;
   1.101 +    device->RestoreWindow = Emscripten_RestoreWindow;
   1.102 +    device->SetWindowGrab = Emscripten_SetWindowGrab;*/
   1.103 +    device->DestroyWindow = Emscripten_DestroyWindow;
   1.104 +    device->SetWindowFullscreen = Emscripten_SetWindowFullscreen;
   1.105 +
   1.106 +    device->CreateWindowFramebuffer = Emscripten_CreateWindowFramebuffer;
   1.107 +    device->UpdateWindowFramebuffer = Emscripten_UpdateWindowFramebuffer;
   1.108 +    device->DestroyWindowFramebuffer = Emscripten_DestroyWindowFramebuffer;
   1.109 +
   1.110 +    device->GL_LoadLibrary = Emscripten_GLES_LoadLibrary;
   1.111 +    device->GL_GetProcAddress = Emscripten_GLES_GetProcAddress;
   1.112 +    device->GL_UnloadLibrary = Emscripten_GLES_UnloadLibrary;
   1.113 +    device->GL_CreateContext = Emscripten_GLES_CreateContext;
   1.114 +    device->GL_MakeCurrent = Emscripten_GLES_MakeCurrent;
   1.115 +    device->GL_SetSwapInterval = Emscripten_GLES_SetSwapInterval;
   1.116 +    device->GL_GetSwapInterval = Emscripten_GLES_GetSwapInterval;
   1.117 +    device->GL_SwapWindow = Emscripten_GLES_SwapWindow;
   1.118 +    device->GL_DeleteContext = Emscripten_GLES_DeleteContext;
   1.119 +    device->GL_GetDrawableSize = Emscripten_GLES_GetDrawableSize;
   1.120 +
   1.121 +    device->free = Emscripten_DeleteDevice;
   1.122 +
   1.123 +    return device;
   1.124 +}
   1.125 +
   1.126 +VideoBootStrap Emscripten_bootstrap = {
   1.127 +    EMSCRIPTENVID_DRIVER_NAME, "SDL emscripten video driver",
   1.128 +    Emscripten_Available, Emscripten_CreateDevice
   1.129 +};
   1.130 +
   1.131 +
   1.132 +int
   1.133 +Emscripten_VideoInit(_THIS)
   1.134 +{
   1.135 +    SDL_DisplayMode mode;
   1.136 +    double css_w, css_h;
   1.137 +
   1.138 +    /* Use a fake 32-bpp desktop mode */
   1.139 +    mode.format = SDL_PIXELFORMAT_RGB888;
   1.140 +
   1.141 +    emscripten_get_element_css_size(NULL, &css_w, &css_h);
   1.142 +
   1.143 +    mode.w = css_w;
   1.144 +    mode.h = css_h;
   1.145 +
   1.146 +    mode.refresh_rate = 0;
   1.147 +    mode.driverdata = NULL;
   1.148 +    if (SDL_AddBasicVideoDisplay(&mode) < 0) {
   1.149 +        return -1;
   1.150 +    }
   1.151 +
   1.152 +    SDL_zero(mode);
   1.153 +    SDL_AddDisplayMode(&_this->displays[0], &mode);
   1.154 +
   1.155 +    Emscripten_InitMouse();
   1.156 +
   1.157 +    /* We're done! */
   1.158 +    return 0;
   1.159 +}
   1.160 +
   1.161 +static int
   1.162 +Emscripten_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode)
   1.163 +{
   1.164 +    /* can't do this */
   1.165 +    return 0;
   1.166 +}
   1.167 +
   1.168 +static void
   1.169 +Emscripten_VideoQuit(_THIS)
   1.170 +{
   1.171 +    Emscripten_FiniMouse();
   1.172 +}
   1.173 +
   1.174 +static void
   1.175 +Emscripten_PumpEvents(_THIS)
   1.176 +{
   1.177 +    /* do nothing. */
   1.178 +}
   1.179 +
   1.180 +static int
   1.181 +Emscripten_CreateWindow(_THIS, SDL_Window * window)
   1.182 +{
   1.183 +    SDL_WindowData *wdata;
   1.184 +    double scaled_w, scaled_h;
   1.185 +    double css_w, css_h;
   1.186 +
   1.187 +    /* Allocate window internal data */
   1.188 +    wdata = (SDL_WindowData *) SDL_calloc(1, sizeof(SDL_WindowData));
   1.189 +    if (wdata == NULL) {
   1.190 +        return SDL_OutOfMemory();
   1.191 +    }
   1.192 +
   1.193 +    if (window->flags & SDL_WINDOW_ALLOW_HIGHDPI) {
   1.194 +        wdata->pixel_ratio = emscripten_get_device_pixel_ratio();
   1.195 +    } else {
   1.196 +        wdata->pixel_ratio = 1.0f;
   1.197 +    }
   1.198 +
   1.199 +    scaled_w = SDL_floor(window->w * wdata->pixel_ratio);
   1.200 +    scaled_h = SDL_floor(window->h * wdata->pixel_ratio);
   1.201 +
   1.202 +    emscripten_set_canvas_size(scaled_w, scaled_h);
   1.203 +
   1.204 +    emscripten_get_element_css_size(NULL, &css_w, &css_h);
   1.205 +
   1.206 +    wdata->external_size = css_w != scaled_w || css_h != scaled_h;
   1.207 +
   1.208 +    if ((window->flags & SDL_WINDOW_RESIZABLE) && wdata->external_size) {
   1.209 +        /* external css has resized us */
   1.210 +        scaled_w = css_w * wdata->pixel_ratio;
   1.211 +        scaled_h = css_h * wdata->pixel_ratio;
   1.212 +
   1.213 +        emscripten_set_canvas_size(scaled_w, scaled_h);
   1.214 +        SDL_SendWindowEvent(window, SDL_WINDOWEVENT_RESIZED, css_w, css_h);
   1.215 +    }
   1.216 +
   1.217 +    /* if the size is not being controlled by css, we need to scale down for hidpi */
   1.218 +    if (!wdata->external_size) {
   1.219 +        if (wdata->pixel_ratio != 1.0f) {
   1.220 +            /*scale canvas down*/
   1.221 +            emscripten_set_element_css_size(NULL, window->w, window->h);
   1.222 +        }
   1.223 +    }
   1.224 +
   1.225 +    wdata->windowed_width = scaled_w;
   1.226 +    wdata->windowed_height = scaled_h;
   1.227 +
   1.228 +    if (window->flags & SDL_WINDOW_OPENGL) {
   1.229 +        if (!_this->egl_data) {
   1.230 +            if (SDL_GL_LoadLibrary(NULL) < 0) {
   1.231 +                return -1;
   1.232 +            }
   1.233 +        }
   1.234 +        wdata->egl_surface = SDL_EGL_CreateSurface(_this, NULL);
   1.235 +
   1.236 +        if (wdata->egl_surface == EGL_NO_SURFACE) {
   1.237 +            return SDL_SetError("Could not create GLES window surface");
   1.238 +        }
   1.239 +    }
   1.240 +
   1.241 +    wdata->window = window;
   1.242 +
   1.243 +    /* Setup driver data for this window */
   1.244 +    window->driverdata = wdata;
   1.245 +
   1.246 +    /* One window, it always has focus */
   1.247 +    SDL_SetMouseFocus(window);
   1.248 +    SDL_SetKeyboardFocus(window);
   1.249 +
   1.250 +    Emscripten_RegisterEventHandlers(wdata);
   1.251 +
   1.252 +    /* Window has been successfully created */
   1.253 +    return 0;
   1.254 +}
   1.255 +
   1.256 +static void Emscripten_SetWindowSize(_THIS, SDL_Window * window)
   1.257 +{
   1.258 +    SDL_WindowData *data;
   1.259 +
   1.260 +    if (window->driverdata) {
   1.261 +        data = (SDL_WindowData *) window->driverdata;
   1.262 +        emscripten_set_canvas_size(window->w * data->pixel_ratio, window->h * data->pixel_ratio);
   1.263 +
   1.264 +        /*scale canvas down*/
   1.265 +        if (!data->external_size && data->pixel_ratio != 1.0f) {
   1.266 +            emscripten_set_element_css_size(NULL, window->w, window->h);
   1.267 +        }
   1.268 +    }
   1.269 +}
   1.270 +
   1.271 +static void
   1.272 +Emscripten_DestroyWindow(_THIS, SDL_Window * window)
   1.273 +{
   1.274 +    SDL_WindowData *data;
   1.275 +
   1.276 +    if(window->driverdata) {
   1.277 +        data = (SDL_WindowData *) window->driverdata;
   1.278 +
   1.279 +        Emscripten_UnregisterEventHandlers(data);
   1.280 +        if (data->egl_surface != EGL_NO_SURFACE) {
   1.281 +            SDL_EGL_DestroySurface(_this, data->egl_surface);
   1.282 +            data->egl_surface = EGL_NO_SURFACE;
   1.283 +        }
   1.284 +        SDL_free(window->driverdata);
   1.285 +        window->driverdata = NULL;
   1.286 +    }
   1.287 +}
   1.288 +
   1.289 +static void
   1.290 +Emscripten_SetWindowFullscreen(_THIS, SDL_Window * window, SDL_VideoDisplay * display, SDL_bool fullscreen)
   1.291 +{
   1.292 +    SDL_WindowData *data;
   1.293 +    if(window->driverdata) {
   1.294 +        data = (SDL_WindowData *) window->driverdata;
   1.295 +
   1.296 +        if(fullscreen) {
   1.297 +            data->requested_fullscreen_mode = window->flags & (SDL_WINDOW_FULLSCREEN_DESKTOP | SDL_WINDOW_FULLSCREEN);
   1.298 +            /*unset the fullscreen flags as we're not actually fullscreen yet*/
   1.299 +            window->flags &= ~(SDL_WINDOW_FULLSCREEN_DESKTOP | SDL_WINDOW_FULLSCREEN);
   1.300 +
   1.301 +            EM_ASM({
   1.302 +                //reparent canvas (similar to Module.requestFullscreen)
   1.303 +                var canvas = Module['canvas'];
   1.304 +                if(canvas.parentNode.id != "SDLFullscreenElement") {
   1.305 +                    var canvasContainer = document.createElement("div");
   1.306 +                    canvasContainer.id = "SDLFullscreenElement";
   1.307 +                    canvas.parentNode.insertBefore(canvasContainer, canvas);
   1.308 +                    canvasContainer.appendChild(canvas);
   1.309 +                }
   1.310 +            });
   1.311 +
   1.312 +            int is_fullscreen;
   1.313 +            emscripten_get_canvas_size(&data->windowed_width, &data->windowed_height, &is_fullscreen);
   1.314 +            emscripten_request_fullscreen("SDLFullscreenElement", 1);
   1.315 +        }
   1.316 +        else
   1.317 +            emscripten_exit_fullscreen();
   1.318 +    }
   1.319 +}
   1.320 +
   1.321 +#endif /* SDL_VIDEO_DRIVER_EMSCRIPTEN */
   1.322 +
   1.323 +/* vi: set ts=4 sw=4 expandtab: */