1 files changed, 156 insertions, 0 deletions
diff --git a/xorg-server/hw/xwin/glx/glwrap.c b/xorg-server/hw/xwin/glx/glwrap.c
new file mode 100644
index 000000000..9733e7526
--- /dev/null
+++ b/xorg-server/hw/xwin/glx/glwrap.c
@@ -0,0 +1,156 @@
+/*
+ * File: glwrap.c
+ * Purpose: Wrapper functions for Win32 OpenGL functions
+ *
+ * Authors: Alexander Gottwald
+ *          Jon TURNEY
+ *
+ * Copyright (c) Jon TURNEY 2009
+ * Copyright (c) Alexander Gottwald 2004
+ *
+ *
+ * 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.
+ */
+
+// define USE_OPENGL32 makes gl.h declare gl*() function prototypes with stdcall linkage,
+// so our generated wrappers will correctly link with the functions in opengl32.dll
+#define USE_OPENGL32
+
+#ifdef HAVE_XWIN_CONFIG_H
+#include <xwin-config.h>
+#endif
+
+#include <X11/Xwindows.h>
+#include <GL/gl.h>
+#include <GL/glext.h>
+#include <glx/glheader.h>
+#include <glx/glxserver.h>
+#include <glx/glxext.h>
+#include <glx/glapi.h>
+#include <glx/dispatch.h>
+#include <glwindows.h>
+#include <winmsg.h>
+
+#ifdef _DEBUG
+static unsigned int glWinIndirectProcCalls = 0;
+static unsigned int glWinDirectProcCalls = 0;
+
+void
+glWinCallDelta(void)
+{
+    static unsigned int glWinIndirectProcCallsLast = 0;
+    static unsigned int glWinDirectProcCallsLast = 0;
+
+    if ((glWinIndirectProcCalls != glWinIndirectProcCallsLast) ||
+        (glWinDirectProcCalls != glWinDirectProcCallsLast)) {
+        if (glxWinDebugSettings.enableTrace) {
+            ErrorF("after %d direct and %d indirect GL calls\n",
+                   glWinDirectProcCalls - glWinDirectProcCallsLast,
+                   glWinIndirectProcCalls - glWinIndirectProcCallsLast);
+        }
+        glWinDirectProcCallsLast = glWinDirectProcCalls;
+        glWinIndirectProcCallsLast = glWinIndirectProcCalls;
+    }
+}
+#endif
+
+static PROC
+glWinResolveHelper(PROC * cache, const char *symbol)
+{
+    PROC proc = NULL;
+
+    /* If not yet cached, call wglGetProcAddress */
+    if ((*cache) == NULL) {
+        proc = wglGetProcAddress(symbol);
+        if (proc == NULL) {
+            winDebug("glwrap: Can't resolve \"%s\"\n", symbol);
+            (*cache) = (PROC) - 1;
+        }
+        else {
+            winDebug("glwrap: Resolved \"%s\"\n", symbol);
+            (*cache) = proc;
+        }
+    }
+    /* Cached wglGetProcAddress failure */
+    else if ((*cache) == (PROC) - 1) {
+        proc = 0;
+    }
+    /* Cached wglGetProcAddress result */
+    else {
+        proc = (*cache);
+    }
+
+    return proc;
+}
+
+#ifdef _DEBUG
+#define INCPROCCALLS   glWinIndirectProcCalls++;
+#else
+#define INCPROCCALLS
+#endif
+
+#define RESOLVE_RET(proctype, symbol, retval) \
+    static PROC cache = NULL; \
+    proctype proc = (proctype)glWinResolveHelper(&cache, symbol); \
+    if (proc == NULL) { \
+        __glXErrorCallBack(0); \
+        return retval; \
+    } \
+    INCPROCCALLS
+
+#define RESOLVE(proctype, symbol) RESOLVE_RET(proctype, symbol,)
+
+#define RESOLVED_PROC(proctype) proc
+
+/*
+  Include generated cdecl wrappers for stdcall gl*() functions in opengl32.dll
+
+  OpenGL 1.2 and upward is treated as extensions, function address must
+  found using wglGetProcAddress(), but also stdcall so still need wrappers...
+
+  Include generated dispatch table setup function
+*/
+
+#include "generated_gl_wrappers.c"
+
+/*
+  Special non-static wrapper for glGetString for debug output
+*/
+
+const GLubyte *
+glGetStringWrapperNonstatic(GLenum name)
+{
+    return glGetString(name);
+}
+
+/*
+  Special non-static wrapper for glAddSwapHintRectWIN for copySubBuffers
+*/
+
+typedef void (__stdcall * PFNGLADDSWAPHINTRECTWIN) (GLint x, GLint y,
+                                                    GLsizei width,
+                                                    GLsizei height);
+
+void
+glAddSwapHintRectWINWrapperNonstatic(GLint x, GLint y, GLsizei width,
+                                     GLsizei height)
+{
+    RESOLVE(PFNGLADDSWAPHINTRECTWIN, "glAddSwapHintRectWIN");
+    proc(x, y, width, height);
+}