1 files changed, 212 insertions, 0 deletions
diff --git a/src/gallium/state_trackers/wgl/stw_ext_pbuffer.c b/src/gallium/state_trackers/wgl/stw_ext_pbuffer.c
new file mode 100644
index 0000000000..32636c603d
--- /dev/null
+++ b/src/gallium/state_trackers/wgl/stw_ext_pbuffer.c
@@ -0,0 +1,212 @@
+/**************************************************************************
+ * 
+ * Copyright 2010 VMware, Inc.
+ * 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, sub license, 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 (including the
+ * next paragraph) 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS 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 <windows.h>
+
+#define WGL_WGLEXT_PROTOTYPES
+
+#include <GL/gl.h>
+#include <GL/wglext.h>
+
+#include "pipe/p_defines.h"
+#include "pipe/p_screen.h"
+
+#include "stw_device.h"
+#include "stw_pixelformat.h"
+#include "stw_framebuffer.h"
+
+
+HPBUFFERARB WINAPI
+wglCreatePbufferARB(HDC _hDC,
+                    int iPixelFormat,
+                    int iWidth,
+                    int iHeight,
+                    const int *piAttribList)
+{
+   static boolean first = TRUE;
+   const int *piAttrib;
+   int useLargest = 0;
+   const struct stw_pixelformat_info *info;
+   struct stw_framebuffer *fb;
+   HWND hWnd;
+   HDC hDC;
+
+   info = stw_pixelformat_get_info(iPixelFormat);
+   if (!info) {
+      SetLastError(ERROR_INVALID_PIXEL_FORMAT);
+      return 0;
+   }
+
+   if (iWidth <= 0 || iHeight <= 0) {
+      SetLastError(ERROR_INVALID_DATA);
+      return 0;
+   }
+
+   for (piAttrib = piAttribList; *piAttrib; piAttrib++) {
+      switch (*piAttrib) {
+      case WGL_PBUFFER_LARGEST_ARB:
+         piAttrib++;
+         useLargest = *piAttrib;
+         break;
+      default:
+         SetLastError(ERROR_INVALID_DATA);
+         return 0;
+      }
+   }
+
+   if (iWidth > stw_dev->max_2d_length) {
+      if (useLargest) {
+         iWidth = stw_dev->max_2d_length;
+      } else {
+         SetLastError(ERROR_NO_SYSTEM_RESOURCES);
+         return 0;
+      }
+   }
+
+   if (iHeight > stw_dev->max_2d_length) {
+      if (useLargest) {
+         iHeight = stw_dev->max_2d_length;
+      } else {
+         SetLastError(ERROR_NO_SYSTEM_RESOURCES);
+         return 0;
+      }
+   }
+
+   /*
+    * Implement pbuffers through invisible windows
+    */
+
+   if (first) {
+      WNDCLASS wc;
+      memset(&wc, 0, sizeof wc);
+      wc.hbrBackground = (HBRUSH) (COLOR_BTNFACE + 1);
+      wc.hCursor = LoadCursor(NULL, IDC_ARROW);
+      wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
+      wc.lpfnWndProc = DefWindowProc;
+      wc.lpszClassName = "wglpbuffer";
+      wc.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
+      RegisterClass(&wc);
+      first = FALSE;
+   }
+
+   hWnd = CreateWindowEx(0,
+                         "wglpbuffer", /* wc.lpszClassName */
+                         "wglpbuffer",
+#if 0 /* Useful for debugging what the application is drawing */
+                         WS_VISIBLE |
+#endif
+                         WS_CLIPSIBLINGS | WS_CLIPCHILDREN,
+                         CW_USEDEFAULT, CW_USEDEFAULT, /* x, y */
+                         iWidth, iHeight,
+                         NULL,
+                         NULL,
+                         NULL,
+                         NULL);
+   if (!hWnd) {
+      return 0;
+   }
+
+   hDC = GetDC(hWnd);
+   if (!hDC) {
+      return 0;
+   }
+
+   SetPixelFormat(hDC, iPixelFormat, &info->pfd);
+
+   fb = stw_framebuffer_create(hDC, iPixelFormat);
+   if (!fb) {
+      SetLastError(ERROR_NO_SYSTEM_RESOURCES);
+   }
+
+   return (HPBUFFERARB)fb;
+}
+
+
+HDC WINAPI
+wglGetPbufferDCARB(HPBUFFERARB hPbuffer)
+{
+   struct stw_framebuffer *fb;
+   HDC hDC;
+
+   fb = (struct stw_framebuffer *)hPbuffer;
+
+   hDC = GetDC(fb->hWnd);
+   SetPixelFormat(hDC, fb->iPixelFormat, &fb->pfi->pfd);
+
+   return hDC;
+}
+
+
+int WINAPI
+wglReleasePbufferDCARB(HPBUFFERARB hPbuffer,
+                       HDC hDC)
+{
+   struct stw_framebuffer *fb;
+
+   fb = (struct stw_framebuffer *)hPbuffer;
+
+   return ReleaseDC(fb->hWnd, hDC);
+}
+
+
+BOOL WINAPI
+wglDestroyPbufferARB(HPBUFFERARB hPbuffer)
+{
+   struct stw_framebuffer *fb;
+
+   fb = (struct stw_framebuffer *)hPbuffer;
+
+   /* This will destroy all our data */
+   return DestroyWindow(fb->hWnd);
+}
+
+
+BOOL WINAPI
+wglQueryPbufferARB(HPBUFFERARB hPbuffer,
+                   int iAttribute,
+                   int *piValue)
+{
+   struct stw_framebuffer *fb;
+
+   fb = (struct stw_framebuffer *)hPbuffer;
+
+   switch (iAttribute) {
+   case WGL_PBUFFER_WIDTH_ARB:
+      *piValue = fb->width;
+      return TRUE;
+   case WGL_PBUFFER_HEIGHT_ARB:
+      *piValue = fb->width;
+      return TRUE;
+   case WGL_PBUFFER_LOST_ARB:
+      /* We assume that no content is ever lost due to display mode change */
+      *piValue = FALSE;
+      return TRUE;
+   default:
+      SetLastError(ERROR_INVALID_DATA);
+      return FALSE;
+   }
+}