ws/gdi: sketch of gdi changes

src/gallium/winsys/gdi/gdi_llvmpipe_winsys.c

@@ -36,7 +36,7 @@
 
 #include <windows.h>
 
-#include "gdi_winsys.h"
+#include "gdi_sw_winsys.h"
 #include "llvmpipe/lp_texture.h"
 
 

src/gallium/winsys/gdi/gdi_softpipe_winsys.c

@@ -36,7 +36,7 @@
 
 #include <windows.h>
 
-#include "gdi_winsys.h"
+#include "gdi_sw_winsys.h"
 #include "softpipe/sp_texture.h"
 
 

src/gallium/winsys/gdi/gdi_sw_winsys.c

@@ -0,0 +1,214 @@
+/**************************************************************************
+ *
+ * Copyright 2009 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 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
+ * THE COPYRIGHT HOLDERS, AUTHORS 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.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ *
+ **************************************************************************/
+
+/**
+ * @file
+ * LLVMpipe support.
+ *
+ * @author Jose Fonseca <jfonseca@vmware.com>
+ */
+
+
+#include <windows.h>
+
+#include "pipe/p_format.h"
+#include "pipe/p_context.h"
+#include "util/u_inlines.h"
+#include "util/u_format.h"
+#include "util/u_math.h"
+#include "util/u_memory.h"
+#include "state_tracker/sw_winsys.h"
+#include "stw_winsys.h"
+
+
+struct gdi_sw_displaytarget
+{
+   enum pipe_format format;
+   unsigned width;
+   unsigned height;
+   unsigned stride;
+
+   unsigned size;
+
+   void *data;
+
+   BITMAPINFO bmi;
+};
+
+
+/** Cast wrapper */
+static INLINE struct gdi_sw_displaytarget *
+gdi_sw_displaytarget( struct sw_displaytarget *buf )
+{
+   return (struct gdi_sw_displaytarget *)buf;
+}
+
+
+static boolean
+gdi_sw_is_displaytarget_format_supported( struct sw_winsys *ws,
+                                                enum pipe_format format )
+{
+   switch(format) {
+   case PIPE_FORMAT_B8G8R8X8_UNORM:
+   case PIPE_FORMAT_B8G8R8A8_UNORM:
+      return TRUE;
+
+   /* TODO: Support other formats possible with BMPs, as described in 
+    * http://msdn.microsoft.com/en-us/library/dd183376(VS.85).aspx */
+      
+   default:
+      return FALSE;
+   }
+}
+
+
+static void *
+gdi_sw_displaytarget_map(struct sw_winsys *ws,
+                               struct sw_displaytarget *dt,
+                               unsigned flags )
+{
+   struct gdi_sw_displaytarget *gdt = gdi_sw_displaytarget(dt);
+
+   return gdt->data;
+}
+
+
+static void
+gdi_sw_displaytarget_unmap(struct sw_winsys *ws,
+                                 struct sw_displaytarget *dt )
+{
+
+}
+
+
+static void
+gdi_sw_displaytarget_destroy(struct sw_winsys *winsys,
+                                   struct sw_displaytarget *dt)
+{
+   struct gdi_sw_displaytarget *gdt = gdi_sw_displaytarget(dt);
+
+   align_free(gdt->data);
+   FREE(gdt);
+}
+
+
+static struct sw_displaytarget *
+gdi_sw_displaytarget_create(struct sw_winsys *winsys,
+                                  enum pipe_format format,
+                                  unsigned width, unsigned height,
+                                  unsigned alignment,
+                                  unsigned *stride)
+{
+   struct gdi_sw_displaytarget *gdt;
+   unsigned cpp;
+   unsigned bpp;
+   
+   gdt = CALLOC_STRUCT(gdi_sw_displaytarget);
+   if(!gdt)
+      goto no_gdt;
+
+   gdt->format = format;
+   gdt->width = width;
+   gdt->height = height;
+
+   bpp = util_format_get_blocksizebits(format);
+   cpp = util_format_get_blocksize(format);
+   
+   gdt->stride = align(width * cpp, alignment);
+   gdt->size = gdt->stride * height;
+   
+   gdt->data = align_malloc(gdt->size, alignment);
+   if(!gdt->data)
+      goto no_data;
+
+   gdt->bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
+   gdt->bmi.bmiHeader.biWidth = gdt->stride / cpp;
+   gdt->bmi.bmiHeader.biHeight= -(long)height;
+   gdt->bmi.bmiHeader.biPlanes = 1;
+   gdt->bmi.bmiHeader.biBitCount = bpp;
+   gdt->bmi.bmiHeader.biCompression = BI_RGB;
+   gdt->bmi.bmiHeader.biSizeImage = 0;
+   gdt->bmi.bmiHeader.biXPelsPerMeter = 0;
+   gdt->bmi.bmiHeader.biYPelsPerMeter = 0;
+   gdt->bmi.bmiHeader.biClrUsed = 0;
+   gdt->bmi.bmiHeader.biClrImportant = 0;
+
+   *stride = gdt->stride;
+   return (struct sw_displaytarget *)gdt;
+
+no_data:
+   FREE(gdt);
+no_gdt:
+   return NULL;
+}
+
+
+static void
+gdi_sw_displaytarget_display(struct sw_winsys *winsys, 
+                             struct sw_displaytarget *dt,
+                             void *context_private)
+{
+    struct gdi_softpipe_displaytarget *gdt = gdi_sw_displaytarget(dt);
+
+    /* nasty:
+     */
+    HDC hDC = (HDC)context_private;
+
+    StretchDIBits(hDC,
+                  0, 0, gdt->width, gdt->height,
+                  0, 0, gdt->width, gdt->height,
+                  gdt->data, &gdt->bmi, 0, SRCCOPY);
+}
+
+
+static void
+gdi_sw_destroy(struct sw_winsys *winsys)
+{
+   FREE(winsys);
+}
+
+struct sw_winsys *
+gdi_create_sw_winsys(void)
+{
+   static struct sw_winsys *winsys;
+
+   winsys = CALLOC_STRUCT(sw_winsys);
+   if(!winsys)
+      return NULL;
+
+   winsys->destroy = gdi_sw_destroy;
+   winsys->is_displaytarget_format_supported = gdi_sw_is_displaytarget_format_supported;
+   winsys->displaytarget_create = gdi_sw_displaytarget_create;
+   winsys->displaytarget_map = gdi_sw_displaytarget_map;
+   winsys->displaytarget_unmap = gdi_sw_displaytarget_unmap;
+   winsys->displaytarget_display = gdi_sw_displaytarget_display;
+   winsys->displaytarget_destroy = gdi_sw_displaytarget_destroy;
+
+   return winsys;
+}
+