stw_framebuffer.c File Reference

Include dependency graph for stw_framebuffer.c:

Go to the source code of this file.

Functions
void	framebuffer_resize (struct stw_framebuffer *fb, GLuint width, GLuint height)
static LRESULT CALLBACK	window_proc (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
struct stw_framebuffer *	framebuffer_create (HDC hdc, GLvisual *visual, GLuint width, GLuint height)
void	framebuffer_destroy (struct stw_framebuffer *fb)
struct stw_framebuffer *	framebuffer_from_hdc (HDC hdc)
Variables
static struct stw_framebuffer *	fb_head = NULL

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Function Documentation

struct stw_framebuffer* framebuffer_create	(	HDC	hdc,
		GLvisual *	visual,
		GLuint	width,
		GLuint	height
	)			[read]

Definition at line 80 of file stw_framebuffer.c.

References CALLOC_STRUCT, PIPE_FORMAT_A8R8G8B8_UNORM, PIPE_FORMAT_NONE, PIPE_FORMAT_S8_UNORM, PIPE_FORMAT_S8Z24_UNORM, PIPE_FORMAT_Z16_UNORM, PIPE_FORMAT_Z32_UNORM, st_create_framebuffer(), stw_framebuffer::stfb, and window_proc().

{
   struct stw_framebuffer *fb;
   enum pipe_format colorFormat, depthFormat, stencilFormat;

   fb = CALLOC_STRUCT( stw_framebuffer );
   if (fb == NULL)
      return NULL;

   /* Determine PIPE_FORMATs for buffers.
    */
   colorFormat = PIPE_FORMAT_A8R8G8B8_UNORM;

   if (visual->depthBits == 0)
      depthFormat = PIPE_FORMAT_NONE;
   else if (visual->depthBits <= 16)
      depthFormat = PIPE_FORMAT_Z16_UNORM;
   else if (visual->depthBits <= 24)
      depthFormat = PIPE_FORMAT_S8Z24_UNORM;
   else
      depthFormat = PIPE_FORMAT_Z32_UNORM;

   if (visual->stencilBits == 8) {
      if (depthFormat == PIPE_FORMAT_S8Z24_UNORM)
         stencilFormat = depthFormat;
      else
         stencilFormat = PIPE_FORMAT_S8_UNORM;
   }
   else {
      stencilFormat = PIPE_FORMAT_NONE;
   }

   fb->stfb = st_create_framebuffer(
      visual,
      colorFormat,
      depthFormat,
      stencilFormat,
      width,
      height,
      (void *) fb );

   fb->cColorBits = GetDeviceCaps( hdc, BITSPIXEL );
   fb->hDC = hdc;

   /* Subclass a window associated with the device context.
    */
   fb->hWnd = WindowFromDC( hdc );
   if (fb->hWnd != NULL) {
      fb->WndProc = (WNDPROC) SetWindowLong(
         fb->hWnd,
         GWL_WNDPROC,
         (LONG) window_proc );
   }

   fb->next = fb_head;
   fb_head = fb;
   return fb;
}

void framebuffer_destroy

(

struct stw_framebuffer *

fb

)

Definition at line 144 of file stw_framebuffer.c.

References FREE, stw_framebuffer::hWnd, stw_framebuffer::next, and stw_framebuffer::WndProc.

{
   struct stw_framebuffer **link = &fb_head;
   struct stw_framebuffer *pfb = fb_head;

   while (pfb != NULL) {
      if (pfb == fb) {
         if (fb->hWnd != NULL) {
            SetWindowLong(
               fb->hWnd,
               GWL_WNDPROC,
               (LONG) fb->WndProc );
         }

         *link = fb->next;
         FREE( fb );
         return;
      }

      link = &pfb->next;
      pfb = pfb->next;
   }
}

struct stw_framebuffer* framebuffer_from_hdc

(

HDC

hdc

)

[read]

Definition at line 172 of file stw_framebuffer.c.

References stw_framebuffer::hDC, and stw_framebuffer::next.

{
   struct stw_framebuffer *fb;

   for (fb = fb_head; fb != NULL; fb = fb->next)
      if (fb->hDC == hdc)
         return fb;
   return NULL;
}

void framebuffer_resize	(	struct stw_framebuffer *	fb,
		GLuint	width,
		GLuint	height
	)

Definition at line 37 of file stw_framebuffer.c.

References st_framebuffer::Base, stw_framebuffer::hbmDIB, stw_framebuffer::hDC, st_resize_framebuffer(), and stw_framebuffer::stfb.

{
   if (fb->hbmDIB == NULL || fb->stfb->Base.Width != width || fb->stfb->Base.Height != height) {
      if (fb->hbmDIB)
         DeleteObject( fb->hbmDIB );

      fb->hbmDIB = CreateCompatibleBitmap(
         fb->hDC,
         width,
         height );
   }

   st_resize_framebuffer( fb->stfb, width, height );
}

static LRESULT CALLBACK window_proc	(	HWND	hWnd,
		UINT	uMsg,
		WPARAM	wParam,
		LPARAM	lParam
	)			[static]

Definition at line 58 of file stw_framebuffer.c.

References assert, framebuffer_resize(), stw_framebuffer::hWnd, stw_framebuffer::next, and stw_framebuffer::WndProc.

{
   struct stw_framebuffer *fb;

   for (fb = fb_head; fb != NULL; fb = fb->next)
      if (fb->hWnd == hWnd)
         break;
   assert( fb != NULL );

   if (uMsg == WM_SIZE && wParam != SIZE_MINIMIZED)
      framebuffer_resize( fb, LOWORD( lParam ), HIWORD( lParam ) );

   return CallWindowProc( fb->WndProc, hWnd, uMsg, wParam, lParam );
}

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Variable Documentation

struct stw_framebuffer* fb_head = NULL [static]

Definition at line 55 of file stw_framebuffer.c.

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