stw_wgl_context.c File Reference

Include dependency graph for stw_wgl_context.c:

Go to the source code of this file.

Functions
WINGDIAPI BOOL APIENTRY	wglCopyContext (HGLRC hglrcSrc, HGLRC hglrcDst, UINT mask)
WINGDIAPI HGLRC APIENTRY	wglCreateContext (HDC hdc)
WINGDIAPI HGLRC APIENTRY	wglCreateLayerContext (HDC hdc, int iLayerPlane)
WINGDIAPI BOOL APIENTRY	wglDeleteContext (HGLRC hglrc)
static void	get_window_size (HDC hdc, GLuint *width, GLuint *height)
WINGDIAPI HGLRC APIENTRY	wglGetCurrentContext (VOID)
WINGDIAPI HDC APIENTRY	wglGetCurrentDC (VOID)
WINGDIAPI BOOL APIENTRY	wglMakeCurrent (HDC hdc, HGLRC hglrc)
struct wgl_context *	wgl_context_from_hdc (HDC hdc)
Variables
static struct wgl_context *	ctx_head = NULL
static HDC	current_hdc = NULL
static HGLRC	current_hrc = NULL

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Function Documentation

static void get_window_size	(	HDC	hdc,
		GLuint *	width,
		GLuint *	height
	)			[static]

Definition at line 183 of file stw_wgl_context.c.

{
   if (WindowFromDC( hdc )) {
      RECT rect;

      GetClientRect( WindowFromDC( hdc ), &rect );
      *width = rect.right - rect.left;
      *height = rect.bottom - rect.top;
   }
   else {
      *width = GetDeviceCaps( hdc, HORZRES );
      *height = GetDeviceCaps( hdc, VERTRES );
   }
}

struct wgl_context* wgl_context_from_hdc

(

HDC

hdc

)

[read]

Definition at line 278 of file stw_wgl_context.c.

References wgl_context::hdc, and wgl_context::next.

{
   struct wgl_context *ctx = ctx_head;

   while (ctx != NULL) {
      if (ctx->hdc == hdc)
         return ctx;
      ctx = ctx->next;
   }
   return NULL;
}

WINGDIAPI BOOL APIENTRY wglCopyContext	(	HGLRC	hglrcSrc,
		HGLRC	hglrcDst,
		UINT	mask
	)

Definition at line 50 of file stw_wgl_context.c.

References FALSE.

{
   (void) hglrcSrc;
   (void) hglrcDst;
   (void) mask;

   return FALSE;
}

WINGDIAPI HGLRC APIENTRY wglCreateContext

(

HDC

hdc

)

Definition at line 63 of file stw_wgl_context.c.

References pixelformat_info::alpha, pixelformat_alpha_info::alphabits, pixelformat_color_info::bluebits, CALLOC_STRUCT, pixelformat_info::color, wgl_context::color_bits, stw_winsys::create_context, st_context::ctx, pixelformat_info::depth, pixelformat_depth_info::depthbits, pipe_context::destroy, pixelformat_info::flags, FREE, pixelformat_color_info::greenbits, wgl_context::hdc, wgl_context::next, PF_FLAG_DOUBLEBUFFER, PF_FLAG_MULTISAMPLED, pixelformat_get_info(), pixelformat_color_info::redbits, stw_device::screen, wgl_context::st, st_create_context(), pixelformat_depth_info::stencilbits, stw_dev, stw_device::stw_winsys, wgl_query_samples(), and wglGetPixelFormat().

{
   uint pfi;
   const struct pixelformat_info *pf;
   struct wgl_context *ctx;
   GLvisual *visual;
   struct pipe_context *pipe;

   pfi = wglGetPixelFormat( hdc );
   if (pfi == 0)
      return NULL;

   pf = pixelformat_get_info( pfi - 1 );

   ctx = CALLOC_STRUCT( wgl_context );
   if (ctx == NULL)
      return NULL;

   ctx->hdc = hdc;
   ctx->color_bits = GetDeviceCaps( ctx->hdc, BITSPIXEL );

   /* Create visual based on flags
    */
   visual = _mesa_create_visual(
      GL_TRUE,
      (pf->flags & PF_FLAG_DOUBLEBUFFER) ? GL_TRUE : GL_FALSE,
      GL_FALSE,
      pf->color.redbits,
      pf->color.greenbits,
      pf->color.bluebits,
      pf->alpha.alphabits,
      0,
      pf->depth.depthbits,
      pf->depth.stencilbits,
      0,
      0,
      0,
      0,
      (pf->flags & PF_FLAG_MULTISAMPLED) ? wgl_query_samples() : 0 );
   if (visual == NULL) {
      FREE( ctx );
      return NULL;
   }

   pipe = stw_dev->stw_winsys->create_context( stw_dev->screen );
   if (!pipe) {
      _mesa_destroy_visual( visual );
      FREE( ctx );
      return NULL;
   }

   ctx->st = st_create_context( pipe, visual, NULL );
   if (ctx->st == NULL) {
      pipe->destroy( pipe );
      _mesa_destroy_visual( visual );
      FREE( ctx );
      return NULL;
   }
   ctx->st->ctx->DriverCtx = ctx;

   ctx->next = ctx_head;
   ctx_head = ctx;

   return (HGLRC) ctx;
}

WINGDIAPI HGLRC APIENTRY wglCreateLayerContext	(	HDC	hdc,
		int	iLayerPlane
	)

Definition at line 131 of file stw_wgl_context.c.

{
   (void) hdc;
   (void) iLayerPlane;

   return NULL;
}

WINGDIAPI BOOL APIENTRY wglDeleteContext

(

HGLRC

hglrc

)

Definition at line 142 of file stw_wgl_context.c.

References st_context::ctx, FALSE, framebuffer_destroy(), framebuffer_from_hdc(), FREE, wgl_context::hdc, wgl_context::next, wgl_context::st, st_destroy_context(), st_make_current(), and TRUE.

{
   struct wgl_context **link = &ctx_head;
   struct wgl_context *ctx = ctx_head;

   while (ctx != NULL) {
      if (ctx == (struct wgl_context *) hglrc) {
         GLcontext *glctx = ctx->st->ctx;
         GET_CURRENT_CONTEXT( glcurctx );
         struct stw_framebuffer *fb;

         /* Unbind current if deleting current context.
          */
         if (glcurctx == glctx)
            st_make_current( NULL, NULL, NULL );

         fb = framebuffer_from_hdc( ctx->hdc );
         if (fb)
            framebuffer_destroy( fb );

         if (WindowFromDC( ctx->hdc ) != NULL)
            ReleaseDC( WindowFromDC( ctx->hdc ), ctx->hdc );

         st_destroy_context( ctx->st );

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

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

   return FALSE;
}

WINGDIAPI HGLRC APIENTRY wglGetCurrentContext

(

VOID

)

Definition at line 199 of file stw_wgl_context.c.

References current_hrc.

{
   return current_hrc;
}

WINGDIAPI HDC APIENTRY wglGetCurrentDC

(

VOID

)

Definition at line 205 of file stw_wgl_context.c.

References current_hdc.

{
    return current_hdc;
}

WINGDIAPI BOOL APIENTRY wglMakeCurrent	(	HDC	hdc,
		HGLRC	hglrc
	)

Definition at line 211 of file stw_wgl_context.c.

References st_context::ctx, current_hdc, current_hrc, stw_framebuffer::dib_hDC, FALSE, framebuffer_create(), framebuffer_from_hdc(), framebuffer_resize(), get_window_size(), stw_framebuffer::hbmDIB, wgl_context::hdc, wgl_context::next, stw_framebuffer::pbPixels, wgl_context::st, st_make_current(), stw_framebuffer::stfb, and TRUE.

{
   struct wgl_context *ctx = ctx_head;
   GET_CURRENT_CONTEXT( glcurctx );
   struct stw_framebuffer *fb;
   GLuint width = 0;
   GLuint height = 0;

   current_hdc = hdc;
   current_hrc = hglrc;

   if (hdc == NULL || hglrc == NULL) {
      st_make_current( NULL, NULL, NULL );
      return TRUE;
   }

   while (ctx != NULL) {
      if (ctx == (struct wgl_context *) hglrc)
         break;
      ctx = ctx->next;
   }
   if (ctx == NULL)
      return FALSE;

   /* Return if already current.
    */
   if (glcurctx != NULL) {
      struct wgl_context *curctx = (struct wgl_context *) glcurctx->DriverCtx;

      if (curctx != NULL && curctx == ctx && ctx->hdc == hdc)
         return TRUE;
   }

   fb = framebuffer_from_hdc( hdc );

   if (hdc != NULL)
      get_window_size( hdc, &width, &height );

   /* Lazy creation of framebuffers.
    */
   if (fb == NULL && ctx != NULL && hdc != NULL) {
      GLvisual *visual = &ctx->st->ctx->Visual;

      fb = framebuffer_create( hdc, visual, width, height );
      if (fb == NULL)
         return FALSE;

      fb->dib_hDC = CreateCompatibleDC( hdc );
      fb->hbmDIB = NULL;
      fb->pbPixels = NULL;
   }

   if (ctx && fb) {
      st_make_current( ctx->st, fb->stfb, fb->stfb );
      framebuffer_resize( fb, width, height );
   }
   else {
      /* Detach */
      st_make_current( NULL, NULL, NULL );
   }

   return TRUE;
}

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Variable Documentation

struct wgl_context* ctx_head = NULL [static]

Definition at line 44 of file stw_wgl_context.c.

HDC current_hdc = NULL [static]

Definition at line 46 of file stw_wgl_context.c.

HGLRC current_hrc = NULL [static]

Definition at line 47 of file stw_wgl_context.c.

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