wgl: Flatten the source tree.

It is easier to have the WGL API on top of the ICD callbacks as
Microsoft's own implementation does, than to have a seperate shared
entity. This source reorganization is in antecipation of that.

1 files changed, 493 insertions, 0 deletions

diff --git a/src/gallium/state_trackers/wgl/stw_framebuffer.c b/src/gallium/state_trackers/wgl/stw_framebuffer.c
new file mode 100644
index 00000000000..b8956bb5509
--- /dev/null
+++ b/src/gallium/state_trackers/wgl/stw_framebuffer.c
@@ -0,0 +1,493 @@
+/**************************************************************************
+ * 
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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 TUNGSTEN GRAPHICS 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>
+
+#include "main/context.h"
+#include "pipe/p_format.h"
+#include "pipe/p_screen.h"
+#include "state_tracker/st_context.h"
+#include "state_tracker/st_public.h"
+
+#ifdef DEBUG
+#include "trace/tr_screen.h"
+#include "trace/tr_texture.h"
+#endif
+
+#include "stw_framebuffer.h"
+#include "stw_device.h"
+#include "stw_public.h"
+#include "stw_winsys.h"
+#include "stw_tls.h"
+
+
+/**
+ * Search the framebuffer with the matching HWND while holding the
+ * stw_dev::fb_mutex global lock.
+ */
+static INLINE struct stw_framebuffer *
+stw_framebuffer_from_hwnd_locked(
+   HWND hwnd )
+{
+   struct stw_framebuffer *fb;
+
+   for (fb = stw_dev->fb_head; fb != NULL; fb = fb->next)
+      if (fb->hWnd == hwnd) {
+         pipe_mutex_lock(fb->mutex);
+         break;
+      }
+
+   return fb;
+}
+
+
+/**
+ * Destroy this framebuffer. Both stw_dev::fb_mutex and stw_framebuffer::mutex
+ * must be held, by this order. Obviously no further access to fb can be done 
+ * after this.
+ */
+static INLINE void
+stw_framebuffer_destroy_locked(
+   struct stw_framebuffer *fb )
+{
+   struct stw_framebuffer **link;
+
+   link = &stw_dev->fb_head;
+   while (*link != fb)
+      link = &(*link)->next;
+   assert(*link);
+   *link = fb->next;
+   fb->next = NULL;
+
+   st_unreference_framebuffer(fb->stfb);
+   
+   pipe_mutex_unlock( fb->mutex );
+
+   pipe_mutex_destroy( fb->mutex );
+   
+   FREE( fb );
+}
+
+
+void
+stw_framebuffer_release(
+   struct stw_framebuffer *fb)
+{
+   assert(fb);
+   pipe_mutex_unlock( fb->mutex );
+}
+
+
+static INLINE void
+stw_framebuffer_get_size( struct stw_framebuffer *fb )
+{
+   unsigned width, height;
+   RECT rect;
+
+   assert(fb->hWnd);
+   
+   GetClientRect( fb->hWnd, &rect );
+   width = rect.right - rect.left;
+   height = rect.bottom - rect.top;
+
+   if(width < 1)
+      width = 1;
+   if(height < 1)
+      height = 1;
+
+   if(width != fb->width || height != fb->height) {
+      fb->must_resize = TRUE;
+      fb->width = width; 
+      fb->height = height; 
+   }
+}
+
+
+/**
+ * @sa http://msdn.microsoft.com/en-us/library/ms644975(VS.85).aspx
+ * @sa http://msdn.microsoft.com/en-us/library/ms644960(VS.85).aspx
+ */
+LRESULT CALLBACK
+stw_call_window_proc(
+   int nCode,
+   WPARAM wParam,
+   LPARAM lParam )
+{
+   struct stw_tls_data *tls_data;
+   PCWPSTRUCT pParams = (PCWPSTRUCT)lParam;
+   struct stw_framebuffer *fb;
+   
+   tls_data = stw_tls_get_data();
+   if(!tls_data)
+      return 0;
+   
+   if (nCode < 0)
+       return CallNextHookEx(tls_data->hCallWndProcHook, nCode, wParam, lParam);
+
+   if (pParams->message == WM_WINDOWPOSCHANGED) {
+      /* We handle WM_WINDOWPOSCHANGED instead of WM_SIZE because according to
+       * http://blogs.msdn.com/oldnewthing/archive/2008/01/15/7113860.aspx 
+       * WM_SIZE is generated from WM_WINDOWPOSCHANGED by DefWindowProc so it 
+       * can be masked out by the application. */
+      LPWINDOWPOS lpWindowPos = (LPWINDOWPOS)pParams->lParam;
+      if((lpWindowPos->flags & SWP_SHOWWINDOW) || 
+         !(lpWindowPos->flags & SWP_NOSIZE)) {
+         fb = stw_framebuffer_from_hwnd( pParams->hwnd );
+         if(fb) {
+            /* Size in WINDOWPOS includes the window frame, so get the size 
+             * of the client area via GetClientRect.  */
+            stw_framebuffer_get_size(fb);
+            stw_framebuffer_release(fb);
+         }
+      }
+   }
+   else if (pParams->message == WM_DESTROY) {
+      pipe_mutex_lock( stw_dev->fb_mutex );
+      fb = stw_framebuffer_from_hwnd_locked( pParams->hwnd );
+      if(fb)
+         stw_framebuffer_destroy_locked(fb);
+      pipe_mutex_unlock( stw_dev->fb_mutex );
+   }
+
+   return CallNextHookEx(tls_data->hCallWndProcHook, nCode, wParam, lParam);
+}
+
+
+struct stw_framebuffer *
+stw_framebuffer_create(
+   HDC hdc,
+   int iPixelFormat )
+{
+   HWND hWnd;
+   struct stw_framebuffer *fb;
+   const struct stw_pixelformat_info *pfi;
+
+   /* We only support drawing to a window. */
+   hWnd = WindowFromDC( hdc );
+   if(!hWnd)
+      return NULL;
+   
+   fb = CALLOC_STRUCT( stw_framebuffer );
+   if (fb == NULL)
+      return NULL;
+
+   fb->hDC = hdc;
+   fb->hWnd = hWnd;
+   fb->iPixelFormat = iPixelFormat;
+
+   fb->pfi = pfi = stw_pixelformat_get_info( iPixelFormat - 1 );
+
+   stw_pixelformat_visual(&fb->visual, pfi);
+   
+   stw_framebuffer_get_size(fb);
+
+   pipe_mutex_init( fb->mutex );
+
+   /* This is the only case where we lock the stw_framebuffer::mutex before
+    * stw_dev::fb_mutex, since no other thread can know about this framebuffer
+    * and we must prevent any other thread from destroying it before we return.
+    */
+   pipe_mutex_lock( fb->mutex );
+
+   pipe_mutex_lock( stw_dev->fb_mutex );
+   fb->next = stw_dev->fb_head;
+   stw_dev->fb_head = fb;
+   pipe_mutex_unlock( stw_dev->fb_mutex );
+
+   return fb;
+}
+
+
+BOOL
+stw_framebuffer_allocate(
+   struct stw_framebuffer *fb)
+{
+   assert(fb);
+   
+   if(!fb->stfb) {
+      const struct stw_pixelformat_info *pfi = fb->pfi;
+      enum pipe_format colorFormat, depthFormat, stencilFormat;
+
+      colorFormat = pfi->color_format;
+      
+      assert(pf_layout( pfi->depth_stencil_format ) == PIPE_FORMAT_LAYOUT_RGBAZS );
+   
+      if(pf_get_component_bits( pfi->depth_stencil_format, PIPE_FORMAT_COMP_Z ))
+         depthFormat = pfi->depth_stencil_format;
+      else
+         depthFormat = PIPE_FORMAT_NONE;
+   
+      if(pf_get_component_bits( pfi->depth_stencil_format, PIPE_FORMAT_COMP_S ))
+         stencilFormat = pfi->depth_stencil_format;
+      else
+         stencilFormat = PIPE_FORMAT_NONE;
+   
+      assert(fb->must_resize);
+      assert(fb->width);
+      assert(fb->height);
+
+      fb->stfb = st_create_framebuffer(
+         &fb->visual,
+         colorFormat,
+         depthFormat,
+         stencilFormat,
+         fb->width,
+         fb->height,
+         (void *) fb );
+      
+      // to notify the context
+      fb->must_resize = TRUE;
+   }
+   
+   return fb->stfb ? TRUE : FALSE;
+}
+
+
+/**
+ * Update the framebuffer's size if necessary.
+ */
+void
+stw_framebuffer_update(
+   struct stw_framebuffer *fb)
+{
+   assert(fb->stfb);
+   assert(fb->height);
+   assert(fb->width);
+   
+   /* XXX: It would be nice to avoid checking the size again -- in theory  
+    * stw_call_window_proc would have cought the resize and stored the right 
+    * size already, but unfortunately threads created before the DllMain is 
+    * called don't get a DLL_THREAD_ATTACH notification, and there is no way
+    * to know of their existing without using the not very portable PSAPI.
+    */
+   stw_framebuffer_get_size(fb);
+   
+   if(fb->must_resize) {
+      st_resize_framebuffer(fb->stfb, fb->width, fb->height);
+      fb->must_resize = FALSE;
+   }
+}                      
+
+
+void
+stw_framebuffer_cleanup( void )
+{
+   struct stw_framebuffer *fb;
+   struct stw_framebuffer *next;
+
+   pipe_mutex_lock( stw_dev->fb_mutex );
+
+   fb = stw_dev->fb_head;
+   while (fb) {
+      next = fb->next;
+      
+      pipe_mutex_lock(fb->mutex);
+      stw_framebuffer_destroy_locked(fb);
+      
+      fb = next;
+   }
+   stw_dev->fb_head = NULL;
+   
+   pipe_mutex_unlock( stw_dev->fb_mutex );
+}
+
+
+/**
+ * Given an hdc, return the corresponding stw_framebuffer.
+ */
+static INLINE struct stw_framebuffer *
+stw_framebuffer_from_hdc_locked(
+   HDC hdc )
+{
+   HWND hwnd;
+   struct stw_framebuffer *fb;
+
+   /* 
+    * Some applications create and use several HDCs for the same window, so 
+    * looking up the framebuffer by the HDC is not reliable. Use HWND whenever
+    * possible.
+    */ 
+   hwnd = WindowFromDC(hdc);
+   if(hwnd)
+      return stw_framebuffer_from_hwnd_locked(hwnd);
+   
+   for (fb = stw_dev->fb_head; fb != NULL; fb = fb->next)
+      if (fb->hDC == hdc) {
+         pipe_mutex_lock(fb->mutex);
+         break;
+      }
+
+   return fb;
+}
+
+
+/**
+ * Given an hdc, return the corresponding stw_framebuffer.
+ */
+struct stw_framebuffer *
+stw_framebuffer_from_hdc(
+   HDC hdc )
+{
+   struct stw_framebuffer *fb;
+
+   pipe_mutex_lock( stw_dev->fb_mutex );
+   fb = stw_framebuffer_from_hdc_locked(hdc);
+   pipe_mutex_unlock( stw_dev->fb_mutex );
+
+   return fb;
+}
+
+
+/**
+ * Given an hdc, return the corresponding stw_framebuffer.
+ */
+struct stw_framebuffer *
+stw_framebuffer_from_hwnd(
+   HWND hwnd )
+{
+   struct stw_framebuffer *fb;
+
+   pipe_mutex_lock( stw_dev->fb_mutex );
+   fb = stw_framebuffer_from_hwnd_locked(hwnd);
+   pipe_mutex_unlock( stw_dev->fb_mutex );
+
+   return fb;
+}
+
+
+BOOL
+stw_pixelformat_set(
+   HDC hdc,
+   int iPixelFormat )
+{
+   uint count;
+   uint index;
+   struct stw_framebuffer *fb;
+
+   index = (uint) iPixelFormat - 1;
+   count = stw_pixelformat_get_extended_count();
+   if (index >= count)
+      return FALSE;
+
+   fb = stw_framebuffer_from_hdc_locked(hdc);
+   if(fb) {
+      /* SetPixelFormat must be called only once */
+      stw_framebuffer_release( fb );
+      return FALSE;
+   }
+
+   fb = stw_framebuffer_create(hdc, iPixelFormat);
+   if(!fb) {
+      return FALSE;
+   }
+      
+   stw_framebuffer_release( fb );
+
+   /* Some applications mistakenly use the undocumented wglSetPixelFormat 
+    * function instead of SetPixelFormat, so we call SetPixelFormat here to 
+    * avoid opengl32.dll's wglCreateContext to fail */
+   if (GetPixelFormat(hdc) == 0) {
+        SetPixelFormat(hdc, iPixelFormat, NULL);
+   }
+   
+   return TRUE;
+}
+
+
+int
+stw_pixelformat_get(
+   HDC hdc )
+{
+   int iPixelFormat = 0;
+   struct stw_framebuffer *fb;
+
+   fb = stw_framebuffer_from_hdc(hdc);
+   if(fb) {
+      iPixelFormat = fb->iPixelFormat;
+      stw_framebuffer_release(fb);
+   }
+   
+   return iPixelFormat;
+}
+
+
+BOOL
+stw_swap_buffers(
+   HDC hdc )
+{
+   struct stw_framebuffer *fb;
+   struct pipe_screen *screen;
+   struct pipe_surface *surface;
+
+   fb = stw_framebuffer_from_hdc( hdc );
+   if (fb == NULL)
+      return FALSE;
+
+   if (!(fb->pfi->pfd.dwFlags & PFD_DOUBLEBUFFER)) {
+      stw_framebuffer_release(fb);
+      return TRUE;
+   }
+
+   /* If we're swapping the buffer associated with the current context
+    * we have to flush any pending rendering commands first.
+    */
+   st_notify_swapbuffers( fb->stfb );
+
+   screen = stw_dev->screen;
+   
+   if(!st_get_framebuffer_surface( fb->stfb, ST_SURFACE_BACK_LEFT, &surface )) {
+      /* FIXME: this shouldn't happen, but does on glean */
+      stw_framebuffer_release(fb);
+      return FALSE;
+   }
+
+#ifdef DEBUG
+   if(stw_dev->trace_running) {
+      screen = trace_screen(screen)->screen;
+      surface = trace_surface(surface)->surface;
+   }
+#endif
+
+   stw_dev->stw_winsys->flush_frontbuffer( screen, surface, hdc );
+   
+   stw_framebuffer_update(fb);
+   stw_framebuffer_release(fb);
+   
+   return TRUE;
+}
+
+
+BOOL
+stw_swap_layer_buffers(
+   HDC hdc,
+   UINT fuPlanes )
+{
+   if(fuPlanes & WGL_SWAP_MAIN_PLANE)
+      return stw_swap_buffers(hdc);
+
+   return FALSE;
+}