1 files changed, 192 insertions, 0 deletions
diff --git a/src/glx/windows/windows_drawable.c b/src/glx/windows/windows_drawable.c
new file mode 100644
index 0000000000..3d8227d3b7
--- /dev/null
+++ b/src/glx/windows/windows_drawable.c
@@ -0,0 +1,192 @@
+/*
+ * Copyright © 2014 Jon Turney
+ *
+ * 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 (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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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 "windowsgl.h"
+#include "windowsgl_internal.h"
+#include "windowsdriconst.h"
+#include "wgl.h"
+
+#include <stdio.h>
+
+/*
+ * Window drawable
+ */
+
+static
+HDC window_getdc(windowsDrawable *d)
+{
+   return GetDC(d->hWnd);
+}
+
+static
+void window_releasedc(windowsDrawable *d, HDC dc)
+{
+   ReleaseDC(d->hWnd, dc);
+}
+
+static struct windowsdrawable_callbacks window_callbacks = {
+   .type = WindowsDRIDrawableWindow,
+   .getdc = window_getdc,
+   .releasedc = window_releasedc
+};
+
+/*
+ * Pixmap drawable
+ */
+
+static
+HDC pixmap_getdc(windowsDrawable *d)
+{
+   return d->dibDC;
+}
+
+static
+void pixmap_releasedc(windowsDrawable *d, HDC dc)
+{
+   GdiFlush();
+}
+
+static struct windowsdrawable_callbacks pixmap_callbacks = {
+   .type = WindowsDRIDrawablePixmap,
+   .getdc = pixmap_getdc,
+   .releasedc = pixmap_releasedc
+};
+
+/*
+ * Pbuffer drawable
+ */
+
+static
+HDC pbuffer_getdc(windowsDrawable *d)
+{
+   return wglGetPbufferDCARB(d->hPbuffer);
+}
+
+static
+void pbuffer_releasedc(windowsDrawable *d, HDC dc)
+{
+   wglReleasePbufferDCARB(d->hPbuffer, dc);
+}
+
+static struct windowsdrawable_callbacks pbuffer_callbacks = {
+   .type = WindowsDRIDrawablePbuffer,
+   .getdc = pbuffer_getdc,
+   .releasedc = pbuffer_releasedc
+};
+
+/*
+ *
+ */
+
+windowsDrawable *
+windows_create_drawable(int type, void *handle)
+{
+   windowsDrawable *d;
+
+   d = calloc(1, sizeof *d);
+   if (d == NULL)
+      return NULL;
+
+   switch (type)
+   {
+   case WindowsDRIDrawableWindow:
+      d->hWnd = handle;
+      d->callbacks = &window_callbacks;
+      break;
+
+   case WindowsDRIDrawablePixmap:
+   {
+      BITMAPINFOHEADER *pBmpHeader;
+      void *pBits;
+
+      char name[MAX_PATH];
+
+      d->callbacks = &pixmap_callbacks;
+
+      // Access file mapping object by a name
+      snprintf(name, sizeof(name), "Local\\CYGWINX_WINDOWSDRI_%08lx", (uintptr_t)handle);
+      d->hSection = OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, name);
+      if (!d->hSection)
+         printf("OpenFileMapping failed %x\n", GetLastError());
+
+      // Create a screen-compatible DC
+      d->dibDC = CreateCompatibleDC(NULL);
+
+      // Map the shared memory section to access the BITMAPINFOHEADER
+      pBmpHeader = (BITMAPINFOHEADER *)MapViewOfFile(d->hSection, FILE_MAP_ALL_ACCESS, 0, 0, sizeof(BITMAPINFOHEADER));
+      if (!pBmpHeader)
+         printf("MapViewOfFile failed %x\n", GetLastError());
+
+      // Create a DIB using the file mapping
+      d->hDIB = CreateDIBSection(d->dibDC, (BITMAPINFO *) pBmpHeader,
+                                 DIB_RGB_COLORS, &pBits, d->hSection,
+                                 sizeof(BITMAPINFOHEADER));
+
+      // Done with the BITMAPINFOHEADER
+      UnmapViewOfFile(pBmpHeader);
+
+      // Select the DIB into the DC
+      d->hOldDIB = SelectObject(d->dibDC, d->hDIB);
+   }
+   break;
+
+   case WindowsDRIDrawablePbuffer:
+      d->hPbuffer = handle;
+      d->callbacks = &pbuffer_callbacks;
+      break;
+   }
+
+   return d;
+}
+
+void
+windows_destroy_drawable(windowsDrawable *drawable)
+{
+   switch (drawable->callbacks->type)
+   {
+   case WindowsDRIDrawableWindow:
+      break;
+
+   case WindowsDRIDrawablePixmap:
+   {
+      // Select the default DIB into the DC
+      SelectObject(drawable->dibDC, drawable->hOldDIB);
+
+      // delete the screen-compatible DC
+      DeleteDC(drawable->dibDC);
+
+      // Delete the DIB
+      DeleteObject(drawable->hDIB);
+
+      // Close the file mapping object
+      CloseHandle(drawable->hSection);
+   }
+   break;
+
+   case WindowsDRIDrawablePbuffer:
+
+      break;
+   }
+
+   free(drawable);
+}