X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;f=src%2Fgtkgl.c;h=b10c52d328f3186135376ae34a9ddf1f78c24027;hb=c605da71628f672c2ff94018e92eb245685d51a1;hp=bb8749403e63ca72bee0dfb5a6356be9a4fc6f75;hpb=76547a2ce3597d4d6e99d8057503be1ab957dad6;p=grits

diff --git a/src/gtkgl.c b/src/gtkgl.c
index bb87494..b10c52d 100644
--- a/src/gtkgl.c
+++ b/src/gtkgl.c
@@ -119,6 +119,42 @@ void gtk_gl_disable(GtkWidget *widget)
 #elif defined(SYS_WIN)
 #include <windows.h>
 #include <gdk/gdkwin32.h>
+#include <GL/gl.h>
+
+/* Windows doens't define OpenGL extensions */
+static void APIENTRY (*glMultiTexCoord2dvPtr)(int target, const double *v);
+static void APIENTRY (*glActiveTexturePtr)(int texture);
+
+void APIENTRY glMultiTexCoord2dv(int target, const double *v)
+{
+	glMultiTexCoord2dvPtr(target, v);
+}
+
+void APIENTRY glActiveTexture(int texture)
+{
+	glActiveTexturePtr(texture);
+}
+
+static void init_extensions(void)
+{
+	static gboolean init_done = FALSE;
+	if (init_done)
+		return;
+	init_done = TRUE;
+
+	g_debug("GtkGl: init_extensions");
+	const guchar *exts = NULL;
+	if (!(exts = glGetString(GL_EXTENSIONS)))
+		g_error("GtkGl: Unable to query extensions");
+	if (!(glMultiTexCoord2dvPtr = (void*)wglGetProcAddress("glMultiTexCoord2dvARB")))
+		g_error("GtkGl: Unable to load glMultiTexCoord2dv extension:\n%s", exts);
+	if (!(glActiveTexturePtr    = (void*)wglGetProcAddress("glActiveTextureARB")))
+		g_error("GtkGl: Unable to load glActiveTexture extension\n%s", exts);
+	g_debug("GtkGl: extensions - glMultiTexCoord2dvPtr=%p glActiveTexturePtr=%p",
+			glMultiTexCoord2dvPtr, glActiveTexturePtr);
+}
+
+/* gtkgl implementation */
 static void on_realize(GtkWidget *widget, gpointer _)
 {
 	g_debug("GtkGl: on_realize");
@@ -167,6 +203,7 @@ void gtk_gl_begin(GtkWidget *widget)
 	HGLRC hRC  = g_object_get_data(G_OBJECT(widget), "glcontext");
 	if (!wglMakeCurrent(hDC, hRC))
 		g_error("GtkGl: wglMakeCurrent failed");
+	init_extensions();
 }
 
 void gtk_gl_end(GtkWidget *widget)
@@ -186,7 +223,6 @@ void gtk_gl_disable(GtkWidget *widget)
 }
 
 
-
 /**************************
  * Mac OSX implementation *
  **************************/