(CGL) Start making Cocoa-less GL context driver

gfx/drivers_context/cgl_ctx.c

@@ -0,0 +1,253 @@
+/*  RetroArch - A frontend for libretro.
+ *  Copyright (C) 2010-2014 - Hans-Kristian Arntzen
+ *  Copyright (C) 2011-2015 - Daniel De Matteis
+ * 
+ *  RetroArch is free software: you can redistribute it and/or modify it under the terms
+ *  of the GNU General Public License as published by the Free Software Found-
+ *  ation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ *  PURPOSE.  See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with RetroArch.
+ *  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Apple CGL context. */
+
+#include <CoreGraphics/CoreGraphics.h>
+#include <OpenGL/CGLTypes.h>
+#include <OpenGL/CGLCurrent.h>
+#include <OpenGL/OpenGL.h>
+#include <OpenGL/gl.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "../../driver.h"
+#include "../video_context_driver.h"
+#include "../video_monitor.h"
+
+typedef int CGSConnectionID;
+typedef int CGSWindowID;
+typedef int CGSSurfaceID;
+
+/* Undocumented CGS */
+extern CGSConnectionID CGSMainConnectionID(void);
+extern CGError CGSAddSurface(CGSConnectionID cid, CGWindowID wid, CGSSurfaceID *sid);
+extern CGError CGSSetSurfaceBounds(CGSConnectionID cid, CGWindowID wid, CGSSurfaceID sid, CGRect rect);
+extern CGError CGSOrderSurface(CGSConnectionID cid, CGWindowID wid, CGSSurface sid, int a, int b);
+
+/* Undocumented CGL */
+extern CGLError CGLSetSurface(CGLContextObj gl, CGSConnectionID, cid, CGSWindowID wid, CGSSurfaceID sid);
+
+typedef struct gfx_ctx_cgl_data
+{
+   CGLContextObj glCtx;
+   CGDirectDisplayID displayID;
+   int width, height;
+} gfx_ctx_cgl_data_t;
+
+static void gfx_ctx_cgl_swap_interval(void *data, unsigned interval)
+{
+   gfx_ctx_cgl_data_t *cgl = (gfx_ctx_cgl_data_t*)data;
+   GLint params            = interval;
+
+   CGLSetParameter(cgl->glCtx, kCGLCPSwapInterval, &params);
+}
+
+static void gfx_ctx_cgl_check_window(void *data, bool *quit,
+      bool *resize, unsigned *width, unsigned *height, unsigned frame_count)
+{
+   (void)frame_count;
+   (void)data;
+   (void)quit;
+   (void)width;
+   (void)height;
+   (void)resize;
+}
+
+static void gfx_ctx_cgl_swap_buffers(void *data)
+{
+   gfx_ctx_cgl_data_t *cgl = (gfx_ctx_cgl_data_t*)data;
+
+   CGLFlushDrawable(cgl->glCtx);
+}
+
+static void gfx_ctx_cgl_set_resize(void *data, unsigned width, unsigned height)
+{
+   (void)data;
+   (void)width;
+   (void)height;
+}
+
+static void gfx_ctx_cgl_update_window_title(void *data)
+{
+   (void)data;
+}
+
+static void gfx_ctx_cgl_get_video_size(void *data, unsigned *width, unsigned *height)
+{
+   (void)data;
+   *width  = 320;
+   *height = 240;
+}
+
+static bool gfx_ctx_cgl_set_video_mode(void *data,
+      unsigned width, unsigned height,
+      bool fullscreen)
+{
+   (void)data;
+   (void)width;
+   (void)height;
+   (void)fullscreen;
+
+   return true;
+}
+
+static void gfx_ctx_cgl_destroy(void *data)
+{
+   gfx_ctx_cgl_data_t *cgl = (gfx_ctx_cgl_data_t*)data;
+   
+   if (cgl->glCtx)
+   {
+      CGLSetCurrentContext(NULL);
+      CGLDestroyContext(cgl->glCtx);
+   }
+
+   if (cgl->displayID)
+      CGDisplayRelease(cgl->displayID);
+
+   if (cgl)
+      free(cgl);
+}
+
+static void gfx_ctx_cgl_input_driver(void *data, const input_driver_t **input, void **input_data)
+{
+   (void)data;
+   (void)input;
+   (void)input_data;
+}
+
+static bool gfx_ctx_cgl_has_focus(void *data)
+{
+   (void)data;
+   return true;
+}
+
+static bool gfx_ctx_cgl_suppress_screensaver(void *data, bool enable)
+{
+   (void)data;
+   (void)enable;
+   return false;
+}
+
+static bool gfx_ctx_cgl_has_windowed(void *data)
+{
+   (void)data;
+   return true;
+}
+
+static bool gfx_ctx_cgl_bind_api(void *data, enum gfx_ctx_api api, unsigned major, unsigned minor)
+{
+   (void)data;
+   (void)api;
+   (void)major;
+   (void)minor;
+
+   return true;
+}
+
+static void gfx_ctx_cgl_show_mouse(void *data, bool state)
+{
+   (void)data;
+   (void)state;
+}
+
+static void gfx_ctx_cgl_bind_hw_render(void *data, bool enable)
+{
+   gfx_ctx_cgl_data_t *cgl = (gfx_ctx_cgl_data_t*)data;
+
+   (void)enable;
+
+   CGLSetCurrentContext(cgl->glCtx);
+
+   /* TODO - needs to handle HW render context too */
+}
+
+static CGLContextObj gfx_ctx_cgl_init_create(void)
+{
+   CGLint num;
+   CGLPixelFormatObj pix;
+   CGLContextObj glCtx = NULL;
+   CGLPixelFormatAttribute attributes[] = {
+      kCGLPFAAccelerated,
+      kCGLPFADoublebuffer,
+      (CGLPixelFormatAttribute)0
+   };
+
+   CGLChoosePixelFormat(attributes, &pix, &num);
+   CGLCreateContext(pix, NULL, &glCtx);
+   CGLDestroyPixelFormat(pix);
+
+   return glCtx;
+}
+
+static bool gfx_ctx_cgl_init(void *data)
+{
+   CGError err;
+   gfx_ctx_cgl_data_t *cgl = (gfx_ctx_cgl_data_t*)calloc(1, sizeof(gfx_ctx_cgl_data_t));
+
+   if (!cgl)
+      goto false;
+
+   cgl->displayID = CGMainDisplayID();
+
+   err = CGDisplayCapture(cgl->displayID);
+
+   if (err != kCGErrorSuccess)
+      goto error;
+
+   cgl->glCtx = gfx_ctx_cgl_init_create();
+
+   if (!cgl->glCtx)
+      goto error;
+
+   driver->video_context_data = cgl;
+
+   return true;
+
+error:
+   gfx_ctx_cgl_destroy(cgl);
+
+   return false;
+}
+
+const gfx_ctx_driver_t gfx_ctx_cgl = {
+   gfx_ctx_cgl_init,
+   gfx_ctx_cgl_destroy,
+   gfx_ctx_cgl_bind_api,
+   gfx_ctx_cgl_swap_interval,
+   gfx_ctx_cgl_set_video_mode,
+   gfx_ctx_cgl_get_video_size,
+   NULL, /* get_video_output_size */
+   NULL, /* get_video_output_prev */
+   NULL, /* get_video_output_next */
+   NULL, /* get_metrics */
+   NULL,
+   gfx_ctx_cgl_update_window_title,
+   gfx_ctx_cgl_check_window,
+   gfx_ctx_cgl_set_resize,
+   gfx_ctx_cgl_has_focus,
+   gfx_ctx_cgl_suppress_screensaver,
+   gfx_ctx_cgl_has_windowed,
+   gfx_ctx_cgl_swap_buffers,
+   gfx_ctx_cgl_input_driver,
+   NULL,
+   NULL,
+   NULL,
+   gfx_ctx_cgl_show_mouse,
+   "cgl",
+   gfx_ctx_cgl_bind_hw_render,
+};

gfx/video_context_driver.h

@@ -163,6 +163,7 @@ extern const gfx_ctx_driver_t gfx_ctx_ps3;
 extern const gfx_ctx_driver_t gfx_ctx_wgl;
 extern const gfx_ctx_driver_t gfx_ctx_videocore;
 extern const gfx_ctx_driver_t gfx_ctx_bbqnx;
+extern const gfx_ctx_driver_t gfx_ctx_cgl;
 extern const gfx_ctx_driver_t gfx_ctx_cocoagl;
 extern const gfx_ctx_driver_t gfx_ctx_emscripten;
 extern const gfx_ctx_driver_t gfx_ctx_null;