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src/glx/apple/apple_glapi.c

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+/*
+ * GLX implementation that uses Apple's OpenGL.framework
+ *
+ * Copyright (c) 2007-2011 Apple Inc.
+ * Copyright (c) 2004 Torrey T. Lyons. All Rights Reserved.
+ * Copyright (c) 2002 Greg Parker. All Rights Reserved.
+ *
+ * Portions of this file are copied from Mesa's xf86glx.c,
+ * which contains the following copyright:
+ *
+ * Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <assert.h>
+#include <dlfcn.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include <GL/gl.h>
+
+#include "glapi.h"
+#include "dispatch.h"
+
+#include "apple_glx.h"
+#include "apple_xgl_api.h"
+#include "apple_cgl.h"
+
+struct _glapi_table * __ogl_framework_api = NULL;
+struct _glapi_table * __applegl_api = NULL;
+
+static void _apple_glapi_create_table(void) {
+    if (__applegl_api)
+        return;
+
+    __ogl_framework_api = _glapi_create_table_from_handle(apple_cgl_get_dl_handle(), "gl");
+    assert(__ogl_framework_api);
+
+    size_t glapi_table_size = _gloffset_COUNT * sizeof(_glapi_proc*);
+    __applegl_api = malloc(glapi_table_size);
+    assert(__applegl_api);
+    memcpy(__applegl_api, __ogl_framework_api, glapi_table_size);
+
+    _glapi_table_patch(__applegl_api, "ReadPixels", __applegl_glReadPixels);
+    _glapi_table_patch(__applegl_api, "CopyPixels", __applegl_glCopyPixels);
+    _glapi_table_patch(__applegl_api, "DrawBuffers", __applegl_glDrawBuffer);
+    _glapi_table_patch(__applegl_api, "Viewport", __applegl_glViewport);
+}
+
+void apple_mesa_glapi_set_dispatch(void) {
+    _apple_glapi_create_table();
+    _mesa_glapi_set_dispatch(__applegl_api);
+}
+
+void apple_glapi_oglfw_viewport_scissor(GLint x, GLint y, GLsizei width, GLsizei height) {
+    _apple_glapi_create_table();
+
+    CALL_Viewport(__ogl_framework_api, (x, y, width, height));
+    CALL_Scissor(__ogl_framework_api, (x, y, width, height));
+}