Chrome's Native Client backend implementation

src/video/nacl/SDL_naclvideo.c

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+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "../../SDL_internal.h"
+
+#if SDL_VIDEO_DRIVER_NACL
+
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/c/pp_instance.h"
+#include "ppapi_simple/ps.h"
+#include "ppapi_simple/ps_interface.h"
+#include "ppapi_simple/ps_event.h"
+#include "nacl_io/nacl_io.h"
+
+#include "SDL_naclvideo.h"
+#include "SDL_naclwindow.h"
+#include "SDL_naclevents_c.h"
+#include "SDL_naclopengles.h"   
+#include "SDL_video.h"
+#include "../SDL_sysvideo.h"
+#include "../../events/SDL_events_c.h"
+
+#define NACLVID_DRIVER_NAME "nacl"
+
+/* Static init required because NACL_SetScreenResolution 
+ * may appear even before SDL starts and we want to remember
+ * the window width and height
+ */
+static SDL_VideoData nacl = {0};
+
+void
+NACL_SetScreenResolution(int width, int height, Uint32 format)
+{
+    PP_Resource context;
+
+    nacl.w = width;
+    nacl.h = height;   
+    nacl.format = format;
+
+    if (nacl.window) {
+        nacl.window->w = width;
+        nacl.window->h = height;
+        SDL_SendWindowEvent(nacl.window, SDL_WINDOWEVENT_RESIZED, width, height);
+    }
+
+    /* FIXME: Check threading issues...otherwise use a hardcoded _this->context across all threads */
+    context = (PP_Resource) SDL_GL_GetCurrentContext();
+    if (context) {
+        PSInterfaceGraphics3D()->ResizeBuffers(context, width, height);
+    }
+
+}
+
+
+
+/* Initialization/Query functions */
+static int NACL_VideoInit(_THIS);
+static void NACL_VideoQuit(_THIS);
+
+static int NACL_Available(void) {
+    return PSGetInstanceId() != 0;
+}
+
+static void NACL_DeleteDevice(SDL_VideoDevice *device) {
+    SDL_VideoData *driverdata = (SDL_VideoData*) device->driverdata;
+    driverdata->ppb_core->ReleaseResource((PP_Resource) driverdata->ppb_message_loop);
+    SDL_free(device->driverdata);
+    SDL_free(device);
+}
+
+static int
+NACL_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode)
+{
+    return 0;
+}
+
+static SDL_VideoDevice *NACL_CreateDevice(int devindex) {
+    SDL_VideoDevice *device;
+
+    /* Initialize all variables that we clean on shutdown */
+    device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
+    if (!device) {
+        SDL_OutOfMemory();
+        return NULL;
+    }
+    device->driverdata = &nacl;
+
+    /* Set the function pointers */
+    device->VideoInit = NACL_VideoInit;
+    device->VideoQuit = NACL_VideoQuit;
+    device->PumpEvents = NACL_PumpEvents;
+
+    device->CreateWindow = NACL_CreateWindow;
+    device->SetWindowTitle = NACL_SetWindowTitle;
+    device->DestroyWindow = NACL_DestroyWindow;
+
+    device->SetDisplayMode = NACL_SetDisplayMode;
+
+    device->free = NACL_DeleteDevice;
+
+    /* GL pointers */
+    device->GL_LoadLibrary = NACL_GLES_LoadLibrary;
+    device->GL_GetProcAddress = NACL_GLES_GetProcAddress;
+    device->GL_UnloadLibrary = NACL_GLES_UnloadLibrary;
+    device->GL_CreateContext = NACL_GLES_CreateContext;
+    device->GL_MakeCurrent = NACL_GLES_MakeCurrent;
+    device->GL_SetSwapInterval = NACL_GLES_SetSwapInterval;
+    device->GL_GetSwapInterval = NACL_GLES_GetSwapInterval;
+    device->GL_SwapWindow = NACL_GLES_SwapWindow;
+    device->GL_DeleteContext = NACL_GLES_DeleteContext;
+
+
+    return device;
+}
+
+VideoBootStrap NACL_bootstrap = {
+    NACLVID_DRIVER_NAME, "SDL Native Client Video Driver",
+    NACL_Available, NACL_CreateDevice
+};
+
+int NACL_VideoInit(_THIS) {
+    SDL_VideoData *driverdata = (SDL_VideoData *) _this->driverdata;
+    SDL_DisplayMode mode;
+
+    mode.format = driverdata->format;
+    mode.w = driverdata->w;
+    mode.h = driverdata->h;
+    mode.refresh_rate = 0;
+    mode.driverdata = NULL;
+    if (SDL_AddBasicVideoDisplay(&mode) < 0) {
+        return -1;
+    }
+
+    SDL_zero(mode);
+    SDL_AddDisplayMode(&_this->displays[0], &mode);
+
+    PSInterfaceInit();
+    driverdata->instance = PSGetInstanceId();
+    driverdata->ppb_graphics = PSInterfaceGraphics3D();
+    driverdata->ppb_message_loop = PSInterfaceMessageLoop();
+    driverdata->ppb_core = PSInterfaceCore();
+    driverdata->ppb_fullscreen = PSInterfaceFullscreen();
+    driverdata->ppb_instance = PSInterfaceInstance();
+    driverdata->ppb_image_data = PSInterfaceImageData();
+    driverdata->ppb_view = PSInterfaceView();
+    driverdata->ppb_var = PSInterfaceVar();
+    driverdata->ppb_input_event = (PPB_InputEvent*) PSGetInterface(PPB_INPUT_EVENT_INTERFACE);
+    driverdata->ppb_keyboard_input_event = (PPB_KeyboardInputEvent*) PSGetInterface(PPB_KEYBOARD_INPUT_EVENT_INTERFACE);
+    driverdata->ppb_mouse_input_event = (PPB_MouseInputEvent*) PSGetInterface(PPB_MOUSE_INPUT_EVENT_INTERFACE);
+    driverdata->ppb_wheel_input_event = (PPB_WheelInputEvent*) PSGetInterface(PPB_WHEEL_INPUT_EVENT_INTERFACE);
+    driverdata->ppb_touch_input_event = (PPB_TouchInputEvent*) PSGetInterface(PPB_TOUCH_INPUT_EVENT_INTERFACE);
+
+
+    driverdata->message_loop = driverdata->ppb_message_loop->Create(driverdata->instance);
+
+    PSEventSetFilter(PSE_ALL);
+
+    /* We're done! */
+    return 0;
+}
+
+void NACL_VideoQuit(_THIS) {
+}
+
+#endif /* SDL_VIDEO_DRIVER_NACL */
+/* vi: set ts=4 sw=4 expandtab: */