1 files changed, 111 insertions, 0 deletions
diff --git a/src/mesa/drivers/x11/xm_buffer.c b/src/mesa/drivers/x11/xm_buffer.c
new file mode 100644
index 00000000000..9f481aaba12
--- /dev/null
+++ b/src/mesa/drivers/x11/xm_buffer.c
@@ -0,0 +1,111 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  6.3
+ *
+ * Copyright (C) 1999-2005  Brian Paul   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
+ * BRIAN PAUL 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 "glxheader.h"
+#include "GL/xmesa.h"
+#include "xmesaP.h"
+#include "imports.h"
+#include "renderbuffer.h"
+
+
+static void
+xmesa_delete_renderbuffer(struct gl_renderbuffer *rb)
+{
+   /* XXX this routine should really delete the attached ximage, etc. */
+}
+
+
+/**
+ * Reallocate renderbuffer storage.
+ * This is called when the window's resized.  It'll get called once for
+ * the front color renderbuffer and again for the back color renderbuffer.
+ */
+static GLboolean
+xmesa_alloc_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
+                    GLenum internalFormat, GLuint width, GLuint height)
+{
+   struct xmesa_renderbuffer *xrb = (struct xmesa_renderbuffer *) rb;
+
+   if (xrb->ximage) {
+      /* Needed by PIXELADDR1 macro */
+      xrb->width1 = xrb->ximage->bytes_per_line;
+      xrb->origin1 = (GLubyte *) xrb->ximage->data + xrb->width1 * (height - 1);
+
+      /* Needed by PIXELADDR2 macro */
+      xrb->width2 = xrb->ximage->bytes_per_line / 2;
+      xrb->origin2 = (GLushort *) xrb->ximage->data + xrb->width2 * (height - 1);
+
+      /* Needed by PIXELADDR3 macro */
+      xrb->width3 = xrb->ximage->bytes_per_line;
+      xrb->origin3 = (GLubyte *) xrb->ximage->data + xrb->width3 * (height - 1);
+
+      /* Needed by PIXELADDR4 macro */
+      xrb->width4 = xrb->ximage->width;
+      xrb->origin4 = (GLuint *) xrb->ximage->data + xrb->width4 * (height - 1);
+   }
+   else {
+      assert(xrb->pixmap);
+   }
+
+   /* for the FLIP macro: */
+   xrb->bottom = height - 1;
+
+   rb->Width = width;
+   rb->Height = height;
+   rb->InternalFormat = internalFormat;
+
+   return GL_TRUE;
+}
+
+
+struct xmesa_renderbuffer *
+xmesa_new_renderbuffer(GLcontext *ctx, GLuint name, GLboolean rgbMode)
+{
+   struct xmesa_renderbuffer *xrb = CALLOC_STRUCT(xmesa_renderbuffer);
+   if (xrb) {
+      GLuint name = 0;
+      _mesa_init_renderbuffer(&xrb->Base, name);
+
+      xrb->Base.Delete = xmesa_delete_renderbuffer;
+      xrb->Base.AllocStorage = xmesa_alloc_storage;
+
+      if (rgbMode) {
+         xrb->Base.InternalFormat = GL_RGBA;
+         xrb->Base._BaseFormat = GL_RGBA;
+         xrb->Base.DataType = GL_UNSIGNED_BYTE;
+      }
+      else {
+         xrb->Base.InternalFormat = GL_COLOR_INDEX;
+         xrb->Base._BaseFormat = GL_COLOR_INDEX;
+         xrb->Base.DataType = GL_UNSIGNED_INT;
+      }
+      xrb->Base.ComponentSizes[0] = 0; /* XXX fix? */
+   }
+   return xrb;
+}
+
+
+
+