Implemented OpenGL support on Mac OS X

The OpenGL renderer works without changes, yay! :)
libsdl-org · Jul 25, 2006 · dafecf2 · dafecf2
1 parent a570316
commit dafecf2
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Showing 16 changed files with 528 additions and 214 deletions.
diff --git a/include/SDL_compat.h b/include/SDL_compat.h
@@ -171,7 +171,6 @@ extern DECLSPEC void SDLCALL SDL_UnlockYUVOverlay(SDL_Overlay * overlay);
 extern DECLSPEC int SDLCALL SDL_DisplayYUVOverlay(SDL_Overlay * overlay,
                                                   SDL_Rect * dstrect);
 extern DECLSPEC void SDLCALL SDL_FreeYUVOverlay(SDL_Overlay * overlay);
-extern DECLSPEC int SDLCALL SDL_GL_GetAttribute(SDL_GLattr attr, int *value);
 extern DECLSPEC void SDLCALL SDL_GL_SwapBuffers(void);
 
 /* Ends C function definitions when using C++ */

diff --git a/include/SDL_video.h b/include/SDL_video.h
@@ -1444,6 +1444,10 @@ extern DECLSPEC int SDLCALL SDL_SoftStretch(SDL_Surface * src,
  *
  * \return 0 on success, or -1 if the library couldn't be loaded
  *
+ * This should be done after initializing the video driver, but before
+ * creating any OpenGL windows.  If no OpenGL library is loaded, the default
+ * library will be loaded upon creation of the first OpenGL window.
+ *
  * \note If you do this, you need to retrieve all of the GL functions used in
  *       your program from the dynamic library using SDL_GL_GetProcAddress().
  *
@@ -1476,11 +1480,9 @@ extern DECLSPEC int SDLCALL SDL_GL_SetAttribute(SDL_GLattr attr, int value);
 /**
  * \fn int SDL_GL_GetWindowAttribute(SDL_WindowID windowID, SDL_GLattr attr, int *value)
  *
- * \brief Get the actual value for an OpenGL window attribute.
+ * \brief Get the actual value for an attribute from the current context.
  */
-extern DECLSPEC int SDLCALL SDL_GL_GetWindowAttribute(SDL_WindowID windowID,
-                                                      SDL_GLattr attr,
-                                                      int *value);
+extern DECLSPEC int SDLCALL SDL_GL_GetAttribute(SDL_GLattr attr, int *value);
 
 /**
  * \fn SDL_GLContext SDL_GL_CreateContext(SDL_WindowID windowID)

diff --git a/src/SDL_compat.c b/src/SDL_compat.c
@@ -1432,12 +1432,6 @@ SDL_FreeYUVOverlay(SDL_Overlay * overlay)
     }
 }
 
-int
-SDL_GL_GetAttribute(SDL_GLattr attr, int *value)
-{
-    return SDL_GL_GetWindowAttribute(SDL_VideoWindow, attr, value);
-}
-
 void
 SDL_GL_SwapBuffers(void)
 {

diff --git a/src/video/SDL_sysvideo.h b/src/video/SDL_sysvideo.h
@@ -232,8 +232,6 @@ struct SDL_VideoDevice
      */
     int (*GL_LoadLibrary) (_THIS, const char *path);
     void *(*GL_GetProcAddress) (_THIS, const char *proc);
-    int (*GL_GetWindowAttribute) (_THIS, SDL_Window * window,
-                                  SDL_GLattr attrib, int *value);
       SDL_GLContext(*GL_CreateContext) (_THIS, SDL_Window * window);
     int (*GL_MakeCurrent) (_THIS, SDL_Window * window, SDL_GLContext context);
     int (*GL_SetSwapInterval) (_THIS, int interval);

diff --git a/src/video/SDL_video.c b/src/video/SDL_video.c
@@ -2131,6 +2131,7 @@ SDL_GL_ExtensionSupported(const char *extension)
 int
 SDL_GL_SetAttribute(SDL_GLattr attr, int value)
 {
+#if SDL_VIDEO_OPENGL
     int retval;
 
     if (!_this) {
@@ -2194,26 +2195,101 @@ SDL_GL_SetAttribute(SDL_GLattr attr, int value)
         break;
     }
     return retval;
+#else
+    SDL_Unsupported();
+    return -1;
+#endif /* SDL_VIDEO_OPENGL */
 }
 
 int
-SDL_GL_GetWindowAttribute(SDL_WindowID windowID, SDL_GLattr attr, int *value)
+SDL_GL_GetAttribute(SDL_GLattr attr, int *value)
 {
-    SDL_Window *window = SDL_GetWindowFromID(windowID);
-    int retval;
+#if SDL_VIDEO_OPENGL
+    void (APIENTRY * glGetIntegervFunc) (GLenum pname, GLint * params);
+    GLenum attrib = 0;
 
-    if (!window) {
+    glGetIntegervFunc = SDL_GL_GetProcAddress("glGetIntegerv");
+    if (!glGetIntegervFunc) {
         return -1;
     }
-
-    if (_this->GL_GetWindowAttribute) {
-        retval = _this->GL_GetWindowAttribute(_this, window, attr, value);
-    } else {
-        *value = 0;
-        SDL_SetError("GL_GetWindowAttribute not supported");
-        retval = -1;
+    switch (attr) {
+    case SDL_GL_RED_SIZE:
+        attrib = GL_RED_BITS;
+        break;
+    case SDL_GL_BLUE_SIZE:
+        attrib = GL_BLUE_BITS;
+        break;
+    case SDL_GL_GREEN_SIZE:
+        attrib = GL_GREEN_BITS;
+        break;
+    case SDL_GL_ALPHA_SIZE:
+        attrib = GL_ALPHA_BITS;
+        break;
+    case SDL_GL_DOUBLEBUFFER:
+        attrib = GL_DOUBLEBUFFER;
+        break;
+    case SDL_GL_DEPTH_SIZE:
+        attrib = GL_DEPTH_BITS;
+        break;
+    case SDL_GL_STENCIL_SIZE:
+        attrib = GL_STENCIL_BITS;
+        break;
+    case SDL_GL_ACCUM_RED_SIZE:
+        attrib = GL_ACCUM_RED_BITS;
+        break;
+    case SDL_GL_ACCUM_GREEN_SIZE:
+        attrib = GL_ACCUM_GREEN_BITS;
+        break;
+    case SDL_GL_ACCUM_BLUE_SIZE:
+        attrib = GL_ACCUM_BLUE_BITS;
+        break;
+    case SDL_GL_ACCUM_ALPHA_SIZE:
+        attrib = GL_ACCUM_ALPHA_BITS;
+        break;
+    case SDL_GL_STEREO:
+        attrib = GL_STEREO;
+        break;
+    case SDL_GL_MULTISAMPLEBUFFERS:
+        attrib = GL_SAMPLE_BUFFERS_ARB;
+        break;
+    case SDL_GL_MULTISAMPLESAMPLES:
+        attrib = GL_SAMPLES_ARB;
+        break;
+    case SDL_GL_BUFFER_SIZE:
+        {
+            GLint bits = 0;
+            GLint component;
+
+            /* there doesn't seem to be a single flag in OpenGL for this! */
+            glGetIntegerv(GL_RED_BITS, &component);
+            bits += component;
+            glGetIntegerv(GL_GREEN_BITS, &component);
+            bits += component;
+            glGetIntegerv(GL_BLUE_BITS, &component);
+            bits += component;
+            glGetIntegerv(GL_ALPHA_BITS, &component);
+            bits += component;
+
+            *value = bits;
+            return 0;
+        }
+    case SDL_GL_ACCELERATED_VISUAL:
+        {
+            /* FIXME: How do we get this information? */
+            *value = (_this->gl_config.accelerated != 0);
+            return 0;
+        }
+    default:
+        SDL_SetError("Unknown OpenGL attribute");
+        return -1;
     }
-    return retval;
+
+    glGetIntegerv(attrib, (GLint *) value);
+    return 0;
+#else
+    SDL_Unsupported();
+    return -1;
+#endif /* SDL_VIDEO_OPENGL */
 }
 
 SDL_GLContext
@@ -2240,6 +2316,9 @@ SDL_GL_MakeCurrent(SDL_WindowID windowID, SDL_GLContext context)
         SDL_SetError("The specified window isn't an OpenGL window");
         return -1;
     }
+    if (!context) {
+        window = NULL;
+    }
     return _this->GL_MakeCurrent(_this, window, context);
 }
 
@@ -2296,6 +2375,7 @@ SDL_GL_DeleteContext(SDL_GLContext context)
     if (!_this || !context) {
         return;
     }
+    _this->GL_MakeCurrent(_this, NULL, NULL);
     _this->GL_DeleteContext(_this, context);
 }
 

diff --git a/src/video/cocoa/SDL_cocoaevents.m b/src/video/cocoa/SDL_cocoaevents.m
@@ -30,20 +30,11 @@ - (void)setAppleMenu:(NSMenu *)menu;
 @end
 #endif
 
-@interface SDLApplication : NSApplication
+@implementation NSApplication(SDL)
+- (void)setRunning
 {
-}
-- (void)finishLaunching;
-@end
-
-@implementation SDLApplication
-
-- (void)finishLaunching
-{
-    [super finishLaunching];
     _running = 1;
 }
-
 @end
 
 static NSString *
@@ -141,13 +132,14 @@ - (void)finishLaunching
 
     pool = [[NSAutoreleasePool alloc] init];
     if (NSApp == nil) {
-        [SDLApplication sharedApplication];
+        [NSApplication sharedApplication];
 
         if ([NSApp mainMenu] == nil) {
             CreateApplicationMenus();
         }
         [NSApp finishLaunching];
     }
+    [NSApp setRunning];
     [pool release];
 }
 

diff --git a/src/video/cocoa/SDL_cocoaopengl.h b/src/video/cocoa/SDL_cocoaopengl.h
@@ -0,0 +1,51 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2006 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library 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
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#ifndef _SDL_cocoaopengl_h
+#define _SDL_cocoaopengl_h
+
+#if SDL_VIDEO_OPENGL
+
+struct SDL_GLDriverData
+{
+    int initialized;
+};
+
+/* OpenGL functions */
+extern int Cocoa_GL_LoadLibrary(_THIS, const char *path);
+extern void *Cocoa_GL_GetProcAddress(_THIS, const char *proc);
+extern int Cocoa_GL_SetupWindow(_THIS, SDL_Window * window);
+extern void Cocoa_GL_CleanupWindow(_THIS, SDL_Window * window);
+extern SDL_GLContext Cocoa_GL_CreateContext(_THIS, SDL_Window * window);
+extern int Cocoa_GL_MakeCurrent(_THIS, SDL_Window * window,
+                                SDL_GLContext context);
+extern int Cocoa_GL_SetSwapInterval(_THIS, int interval);
+extern int Cocoa_GL_GetSwapInterval(_THIS);
+extern void Cocoa_GL_SwapWindow(_THIS, SDL_Window * window);
+extern void Cocoa_GL_DeleteContext(_THIS, SDL_GLContext context);
+
+#endif /* SDL_VIDEO_OPENGL */
+
+#endif /* _SDL_cocoaopengl_h */
+
+/* vi: set ts=4 sw=4 expandtab: */