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Sweden-Number/dlls/gdi32/dc.c

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/*
* GDI Device Context functions
*
* Copyright 1993 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <assert.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winreg.h"
#include "winnls.h"
#include "winternl.h"
#include "winerror.h"
#include "ntgdi_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(dc);
static BOOL DC_DeleteObject( HGDIOBJ handle );
static const struct gdi_obj_funcs dc_funcs =
{
NULL, /* pGetObjectW */
NULL, /* pUnrealizeObject */
DC_DeleteObject /* pDeleteObject */
};
static inline DC *get_dc_obj( HDC hdc )
{
DWORD type;
DC *dc = get_any_obj_ptr( hdc, &type );
if (!dc) return NULL;
switch (type)
{
case NTGDI_OBJ_DC:
case NTGDI_OBJ_MEMDC:
case NTGDI_OBJ_ENHMETADC:
return dc;
default:
GDI_ReleaseObj( hdc );
SetLastError( ERROR_INVALID_HANDLE );
return NULL;
}
}
/***********************************************************************
* set_initial_dc_state
*/
static void set_initial_dc_state( DC *dc )
{
dc->attr->wnd_org.x = 0;
dc->attr->wnd_org.y = 0;
dc->attr->wnd_ext.cx = 1;
dc->attr->wnd_ext.cy = 1;
dc->attr->vport_org.x = 0;
dc->attr->vport_org.y = 0;
dc->attr->vport_ext.cx = 1;
dc->attr->vport_ext.cy = 1;
dc->attr->miter_limit = 10.0f; /* 10.0 is the default, from MSDN */
dc->attr->layout = 0;
dc->attr->rop_mode = R2_COPYPEN;
dc->attr->font_code_page = CP_ACP;
dc->attr->poly_fill_mode = ALTERNATE;
dc->attr->stretch_blt_mode = BLACKONWHITE;
dc->attr->rel_abs_mode = ABSOLUTE;
dc->attr->background_mode = OPAQUE;
dc->attr->background_color = RGB( 255, 255, 255 );
dc->attr->brush_color = RGB( 255, 255, 255 );
dc->attr->pen_color = RGB( 0, 0, 0 );
dc->attr->text_color = RGB( 0, 0, 0 );
dc->attr->brush_org.x = 0;
dc->attr->brush_org.y = 0;
dc->attr->mapper_flags = 0;
dc->attr->text_align = TA_LEFT | TA_TOP | TA_NOUPDATECP;
dc->attr->char_extra = 0;
dc->breakExtra = 0;
dc->breakRem = 0;
dc->attr->map_mode = MM_TEXT;
dc->attr->graphics_mode = GM_COMPATIBLE;
dc->attr->cur_pos.x = 0;
dc->attr->cur_pos.y = 0;
dc->attr->arc_direction = AD_COUNTERCLOCKWISE;
dc->xformWorld2Wnd.eM11 = 1.0f;
dc->xformWorld2Wnd.eM12 = 0.0f;
dc->xformWorld2Wnd.eM21 = 0.0f;
dc->xformWorld2Wnd.eM22 = 1.0f;
dc->xformWorld2Wnd.eDx = 0.0f;
dc->xformWorld2Wnd.eDy = 0.0f;
dc->xformWorld2Vport = dc->xformWorld2Wnd;
dc->xformVport2World = dc->xformWorld2Wnd;
dc->vport2WorldValid = TRUE;
reset_bounds( &dc->bounds );
}
/***********************************************************************
* alloc_dc_ptr
*/
DC *alloc_dc_ptr( DWORD magic )
{
DC *dc;
if (!(dc = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*dc) ))) return NULL;
if (!(dc->attr = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*dc->attr))))
{
HeapFree( GetProcessHeap(), 0, dc );
return NULL;
}
dc->nulldrv.funcs = &null_driver;
dc->physDev = &dc->nulldrv;
dc->thread = GetCurrentThreadId();
dc->refcount = 1;
dc->hPen = GDI_inc_ref_count( get_stock_object( BLACK_PEN ));
dc->hBrush = GDI_inc_ref_count( get_stock_object( WHITE_BRUSH ));
dc->hFont = GDI_inc_ref_count( get_stock_object( SYSTEM_FONT ));
dc->hPalette = get_stock_object( DEFAULT_PALETTE );
set_initial_dc_state( dc );
if (!(dc->hSelf = alloc_gdi_handle( &dc->obj, magic, &dc_funcs )))
{
HeapFree( GetProcessHeap(), 0, dc->attr );
HeapFree( GetProcessHeap(), 0, dc );
return NULL;
}
dc->attr->hdc = dc->nulldrv.hdc = dc->hSelf;
set_gdi_client_ptr( dc->hSelf, dc->attr );
if (!font_driver.pCreateDC( &dc->physDev, NULL, NULL, NULL, NULL ))
{
free_dc_ptr( dc );
return NULL;
}
return dc;
}
/***********************************************************************
* free_dc_state
*/
static void free_dc_state( DC *dc )
{
if (dc->hClipRgn) NtGdiDeleteObjectApp( dc->hClipRgn );
if (dc->hMetaRgn) NtGdiDeleteObjectApp( dc->hMetaRgn );
if (dc->hVisRgn) NtGdiDeleteObjectApp( dc->hVisRgn );
if (dc->region) NtGdiDeleteObjectApp( dc->region );
if (dc->path) free_gdi_path( dc->path );
HeapFree( GetProcessHeap(), 0, dc->attr );
HeapFree( GetProcessHeap(), 0, dc );
}
/***********************************************************************
* free_dc_ptr
*/
void free_dc_ptr( DC *dc )
{
assert( dc->refcount == 1 );
while (dc->physDev != &dc->nulldrv)
{
PHYSDEV physdev = dc->physDev;
dc->physDev = physdev->next;
physdev->funcs->pDeleteDC( physdev );
}
GDI_dec_ref_count( dc->hPen );
GDI_dec_ref_count( dc->hBrush );
GDI_dec_ref_count( dc->hFont );
if (dc->hBitmap) GDI_dec_ref_count( dc->hBitmap );
free_gdi_handle( dc->hSelf );
free_dc_state( dc );
}
/***********************************************************************
* get_dc_ptr
*
* Retrieve a DC pointer but release the GDI lock.
*/
DC *get_dc_ptr( HDC hdc )
{
DC *dc = get_dc_obj( hdc );
if (!dc) return NULL;
if (dc->attr->disabled)
{
GDI_ReleaseObj( hdc );
return NULL;
}
if (!InterlockedCompareExchange( &dc->refcount, 1, 0 ))
{
dc->thread = GetCurrentThreadId();
}
else if (dc->thread != GetCurrentThreadId())
{
WARN( "dc %p belongs to thread %04x\n", hdc, dc->thread );
GDI_ReleaseObj( hdc );
return NULL;
}
else InterlockedIncrement( &dc->refcount );
GDI_ReleaseObj( hdc );
return dc;
}
/***********************************************************************
* release_dc_ptr
*/
void release_dc_ptr( DC *dc )
{
LONG ref;
dc->thread = 0;
ref = InterlockedDecrement( &dc->refcount );
assert( ref >= 0 );
if (ref) dc->thread = GetCurrentThreadId(); /* we still own it */
}
/***********************************************************************
* update_dc
*
* Make sure the DC vis region is up to date.
* This function may call up to USER so the GDI lock should _not_
* be held when calling it.
*/
void update_dc( DC *dc )
{
if (InterlockedExchange( &dc->dirty, 0 ) && dc->hookProc)
dc->hookProc( dc->hSelf, DCHC_INVALIDVISRGN, dc->dwHookData, 0 );
}
static void set_bk_color( DC *dc, COLORREF color )
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetBkColor );
dc->attr->background_color = physdev->funcs->pSetBkColor( physdev, color );
}
static void set_text_color( DC *dc, COLORREF color )
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetTextColor );
dc->attr->text_color = physdev->funcs->pSetTextColor( physdev, color );
}
/***********************************************************************
* DC_InitDC
*
* Setup device-specific DC values for a newly created DC.
*/
void DC_InitDC( DC* dc )
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pRealizeDefaultPalette );
physdev->funcs->pRealizeDefaultPalette( physdev );
set_text_color( dc, dc->attr->text_color );
set_bk_color( dc, dc->attr->background_color );
NtGdiSelectPen( dc->hSelf, dc->hPen );
NtGdiSelectBrush( dc->hSelf, dc->hBrush );
NtGdiSelectFont( dc->hSelf, dc->hFont );
update_dc_clipping( dc );
NtGdiSetVirtualResolution( dc->hSelf, 0, 0, 0, 0 );
physdev = GET_DC_PHYSDEV( dc, pSetBoundsRect );
physdev->funcs->pSetBoundsRect( physdev, &dc->bounds, dc->bounds_enabled ? DCB_ENABLE : DCB_DISABLE );
}
/***********************************************************************
* DC_InvertXform
*
* Computes the inverse of the transformation xformSrc and stores it to
* xformDest. Returns TRUE if successful or FALSE if the xformSrc matrix
* is singular.
*/
static BOOL DC_InvertXform( const XFORM *xformSrc, XFORM *xformDest )
{
double determinant;
determinant = xformSrc->eM11*xformSrc->eM22 -
xformSrc->eM12*xformSrc->eM21;
if (determinant > -1e-12 && determinant < 1e-12)
return FALSE;
xformDest->eM11 = xformSrc->eM22 / determinant;
xformDest->eM12 = -xformSrc->eM12 / determinant;
xformDest->eM21 = -xformSrc->eM21 / determinant;
xformDest->eM22 = xformSrc->eM11 / determinant;
xformDest->eDx = -xformSrc->eDx * xformDest->eM11 -
xformSrc->eDy * xformDest->eM21;
xformDest->eDy = -xformSrc->eDx * xformDest->eM12 -
xformSrc->eDy * xformDest->eM22;
return TRUE;
}
/* Construct a transformation to do the window-to-viewport conversion */
static void construct_window_to_viewport(DC *dc, XFORM *xform)
{
double scaleX, scaleY;
scaleX = (double)dc->attr->vport_ext.cx / (double)dc->attr->wnd_ext.cx;
scaleY = (double)dc->attr->vport_ext.cy / (double)dc->attr->wnd_ext.cy;
if (dc->attr->layout & LAYOUT_RTL) scaleX = -scaleX;
xform->eM11 = scaleX;
xform->eM12 = 0.0;
xform->eM21 = 0.0;
xform->eM22 = scaleY;
xform->eDx = (double)dc->attr->vport_org.x - scaleX * (double)dc->attr->wnd_org.x;
xform->eDy = (double)dc->attr->vport_org.y - scaleY * (double)dc->attr->wnd_org.y;
if (dc->attr->layout & LAYOUT_RTL)
xform->eDx = dc->attr->vis_rect.right - dc->attr->vis_rect.left - 1 - xform->eDx;
}
/***********************************************************************
* linear_xform_cmp
*
* Compares the linear transform portion of two XFORMs (i.e. the 2x2 submatrix).
* Returns 0 if they match.
*/
static inline int linear_xform_cmp( const XFORM *a, const XFORM *b )
{
return memcmp( a, b, FIELD_OFFSET( XFORM, eDx ) );
}
/***********************************************************************
* DC_UpdateXforms
*
* Updates the xformWorld2Vport, xformVport2World and vport2WorldValid
* fields of the specified DC by creating a transformation that
* represents the current mapping mode and combining it with the DC's
* world transform. This function should be called whenever the
* parameters associated with the mapping mode (window and viewport
* extents and origins) or the world transform change.
*/
void DC_UpdateXforms( DC *dc )
{
XFORM xformWnd2Vport, oldworld2vport;
construct_window_to_viewport(dc, &xformWnd2Vport);
oldworld2vport = dc->xformWorld2Vport;
/* Combine with the world transformation */
combine_transform( &dc->xformWorld2Vport, &dc->xformWorld2Wnd, &xformWnd2Vport );
/* Create inverse of world-to-viewport transformation */
dc->vport2WorldValid = DC_InvertXform( &dc->xformWorld2Vport,
&dc->xformVport2World );
/* Reselect the font and pen back into the dc so that the size
gets updated. */
if (linear_xform_cmp( &oldworld2vport, &dc->xformWorld2Vport ) &&
get_gdi_object_type( dc->hSelf ) != NTGDI_OBJ_METADC)
{
NtGdiSelectFont(dc->hSelf, dc->hFont);
NtGdiSelectPen(dc->hSelf, dc->hPen);
}
}
/***********************************************************************
* reset_dc_state
*/
static BOOL reset_dc_state( HDC hdc )
{
DC *dc, *dcs, *next;
if (!(dc = get_dc_ptr( hdc ))) return FALSE;
set_initial_dc_state( dc );
set_bk_color( dc, RGB( 255, 255, 255 ));
set_text_color( dc, RGB( 0, 0, 0 ));
NtGdiSelectBrush( hdc, get_stock_object( WHITE_BRUSH ));
NtGdiSelectFont( hdc, get_stock_object( SYSTEM_FONT ));
NtGdiSelectPen( hdc, get_stock_object( BLACK_PEN ));
NtGdiSetVirtualResolution( hdc, 0, 0, 0, 0 );
GDISelectPalette( hdc, get_stock_object( DEFAULT_PALETTE ), FALSE );
NtGdiSetBoundsRect( hdc, NULL, DCB_DISABLE );
NtGdiAbortPath( hdc );
if (dc->hClipRgn) NtGdiDeleteObjectApp( dc->hClipRgn );
if (dc->hMetaRgn) NtGdiDeleteObjectApp( dc->hMetaRgn );
dc->hClipRgn = 0;
dc->hMetaRgn = 0;
update_dc_clipping( dc );
for (dcs = dc->saved_dc; dcs; dcs = next)
{
next = dcs->saved_dc;
free_dc_state( dcs );
}
dc->saved_dc = NULL;
dc->attr->save_level = 0;
release_dc_ptr( dc );
return TRUE;
}
/***********************************************************************
* DC_DeleteObject
*/
static BOOL DC_DeleteObject( HGDIOBJ handle )
{
DC *dc;
TRACE( "%p\n", handle );
GDI_CheckNotLock();
if (!(dc = get_dc_ptr( handle ))) return FALSE;
if (dc->refcount != 1)
{
FIXME( "not deleting busy DC %p refcount %u\n", dc->hSelf, dc->refcount );
release_dc_ptr( dc );
return FALSE;
}
/* Call hook procedure to check whether is it OK to delete this DC */
if (dc->hookProc && !dc->hookProc( dc->hSelf, DCHC_DELETEDC, dc->dwHookData, 0 ))
{
release_dc_ptr( dc );
return TRUE;
}
reset_dc_state( handle );
free_dc_ptr( dc );
return TRUE;
}
/***********************************************************************
* NtGdiSaveDC (win32u.@)
*/
INT WINAPI NtGdiSaveDC( HDC hdc )
{
DC *dc, *newdc;
INT ret;
if (!(dc = get_dc_ptr( hdc ))) return 0;
if (!(newdc = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*newdc ))))
{
release_dc_ptr( dc );
return 0;
}
if (!(newdc->attr = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*newdc->attr) )))
{
HeapFree( GetProcessHeap(), 0, newdc );
release_dc_ptr( dc );
return 0;
}
*newdc->attr = *dc->attr;
newdc->hPen = dc->hPen;
newdc->hBrush = dc->hBrush;
newdc->hFont = dc->hFont;
newdc->hBitmap = dc->hBitmap;
newdc->hPalette = dc->hPalette;
newdc->breakExtra = dc->breakExtra;
newdc->breakRem = dc->breakRem;
newdc->xformWorld2Wnd = dc->xformWorld2Wnd;
newdc->xformWorld2Vport = dc->xformWorld2Vport;
newdc->xformVport2World = dc->xformVport2World;
newdc->vport2WorldValid = dc->vport2WorldValid;
/* Get/SetDCState() don't change hVisRgn field ("Undoc. Windows" p.559). */
if (dc->hClipRgn)
{
newdc->hClipRgn = NtGdiCreateRectRgn( 0, 0, 0, 0 );
NtGdiCombineRgn( newdc->hClipRgn, dc->hClipRgn, 0, RGN_COPY );
}
if (dc->hMetaRgn)
{
newdc->hMetaRgn = NtGdiCreateRectRgn( 0, 0, 0, 0 );
NtGdiCombineRgn( newdc->hMetaRgn, dc->hMetaRgn, 0, RGN_COPY );
}
if (!PATH_SavePath( newdc, dc ))
{
release_dc_ptr( dc );
free_dc_state( newdc );
return 0;
}
newdc->saved_dc = dc->saved_dc;
dc->saved_dc = newdc;
ret = ++dc->attr->save_level;
release_dc_ptr( dc );
return ret;
}
/***********************************************************************
* NtGdiRestoreDC (win32u.@)
*/
BOOL WINAPI NtGdiRestoreDC( HDC hdc, INT level )
{
DC *dc, *dcs, *first_dcs;
INT save_level;
TRACE("%p %d\n", hdc, level );
if (!(dc = get_dc_ptr( hdc ))) return FALSE;
update_dc( dc );
/* find the state level to restore */
if (abs(level) > dc->attr->save_level || level == 0)
{
release_dc_ptr( dc );
return FALSE;
}
if (level < 0) level = dc->attr->save_level + level + 1;
first_dcs = dc->saved_dc;
for (dcs = first_dcs, save_level = dc->attr->save_level; save_level > level; save_level--)
dcs = dcs->saved_dc;
/* restore the state */
if (!PATH_RestorePath( dc, dcs ))
{
release_dc_ptr( dc );
return FALSE;
}
dc->attr->layout = dcs->attr->layout;
dc->attr->rop_mode = dcs->attr->rop_mode;
dc->attr->poly_fill_mode = dcs->attr->poly_fill_mode;
dc->attr->stretch_blt_mode = dcs->attr->stretch_blt_mode;
dc->attr->rel_abs_mode = dcs->attr->rel_abs_mode;
dc->attr->background_mode = dcs->attr->background_mode;
dc->attr->background_color = dcs->attr->background_color;
dc->attr->text_color = dcs->attr->text_color;
dc->attr->brush_color = dcs->attr->brush_color;
dc->attr->pen_color = dcs->attr->pen_color;
dc->attr->brush_org = dcs->attr->brush_org;
dc->attr->mapper_flags = dcs->attr->mapper_flags;
dc->attr->text_align = dcs->attr->text_align;
dc->attr->char_extra = dcs->attr->char_extra;
dc->attr->map_mode = dcs->attr->map_mode;
dc->attr->graphics_mode = dcs->attr->graphics_mode;
dc->attr->cur_pos = dcs->attr->cur_pos;
dc->attr->arc_direction = dcs->attr->arc_direction;
dc->attr->wnd_org = dcs->attr->wnd_org;
dc->attr->wnd_ext = dcs->attr->wnd_ext;
dc->attr->vport_org = dcs->attr->vport_org;
dc->attr->vport_ext = dcs->attr->vport_ext;
dc->attr->virtual_res = dcs->attr->virtual_res;
dc->attr->virtual_size = dcs->attr->virtual_size;
dc->breakExtra = dcs->breakExtra;
dc->breakRem = dcs->breakRem;
dc->xformWorld2Wnd = dcs->xformWorld2Wnd;
dc->xformWorld2Vport = dcs->xformWorld2Vport;
dc->xformVport2World = dcs->xformVport2World;
dc->vport2WorldValid = dcs->vport2WorldValid;
if (dcs->hClipRgn)
{
if (!dc->hClipRgn) dc->hClipRgn = NtGdiCreateRectRgn( 0, 0, 0, 0 );
NtGdiCombineRgn( dc->hClipRgn, dcs->hClipRgn, 0, RGN_COPY );
}
else
{
if (dc->hClipRgn) NtGdiDeleteObjectApp( dc->hClipRgn );
dc->hClipRgn = 0;
}
if (dcs->hMetaRgn)
{
if (!dc->hMetaRgn) dc->hMetaRgn = NtGdiCreateRectRgn( 0, 0, 0, 0 );
NtGdiCombineRgn( dc->hMetaRgn, dcs->hMetaRgn, 0, RGN_COPY );
}
else
{
if (dc->hMetaRgn) NtGdiDeleteObjectApp( dc->hMetaRgn );
dc->hMetaRgn = 0;
}
DC_UpdateXforms( dc );
update_dc_clipping( dc );
NtGdiSelectBitmap( hdc, dcs->hBitmap );
NtGdiSelectBrush( hdc, dcs->hBrush );
NtGdiSelectFont( hdc, dcs->hFont );
NtGdiSelectPen( hdc, dcs->hPen );
set_bk_color( dc, dcs->attr->background_color);
set_text_color( dc, dcs->attr->text_color);
GDISelectPalette( hdc, dcs->hPalette, FALSE );
dc->saved_dc = dcs->saved_dc;
dcs->saved_dc = 0;
dc->attr->save_level = save_level - 1;
/* now destroy all the saved DCs */
while (first_dcs)
{
DC *next = first_dcs->saved_dc;
free_dc_state( first_dcs );
first_dcs = next;
}
release_dc_ptr( dc );
return TRUE;
}
/***********************************************************************
* CreateDCW (GDI32.@)
*/
HDC WINAPI CreateDCW( LPCWSTR driver, LPCWSTR device, LPCWSTR output,
const DEVMODEW *initData )
{
const WCHAR *display, *p;
HDC hdc;
DC * dc;
const struct gdi_dc_funcs *funcs;
WCHAR buf[300];
GDI_CheckNotLock();
if (!device || !DRIVER_GetDriverName( device, buf, 300 ))
{
if (!driver)
{
ERR( "no device found for %s\n", debugstr_w(device) );
return 0;
}
lstrcpyW(buf, driver);
}
if (!(funcs = DRIVER_load_driver( buf )))
{
ERR( "no driver found for %s\n", debugstr_w(buf) );
return 0;
}
if (!(dc = alloc_dc_ptr( NTGDI_OBJ_DC ))) return 0;
hdc = dc->hSelf;
dc->hBitmap = GDI_inc_ref_count( get_stock_object( DEFAULT_BITMAP ));
TRACE("(driver=%s, device=%s, output=%s): returning %p\n",
debugstr_w(driver), debugstr_w(device), debugstr_w(output), dc->hSelf );
if (funcs->pCreateDC)
{
if (!funcs->pCreateDC( &dc->physDev, buf, device, output, initData ))
{
WARN("creation aborted by device\n" );
free_dc_ptr( dc );
return 0;
}
}
if (is_display_device( driver ))
display = driver;
else if (is_display_device( device ))
display = device;
else
display = NULL;
if (display)
{
/* Copy only the display name. For example, \\.\DISPLAY1 in \\.\DISPLAY1\Monitor0 */
p = display + 12;
while (iswdigit( *p ))
++p;
lstrcpynW( dc->display, display, p - display + 1 );
dc->display[p - display] = '\0';
}
dc->attr->vis_rect.left = 0;
dc->attr->vis_rect.top = 0;
dc->attr->vis_rect.right = NtGdiGetDeviceCaps( hdc, DESKTOPHORZRES );
dc->attr->vis_rect.bottom = NtGdiGetDeviceCaps( hdc, DESKTOPVERTRES );
DC_InitDC( dc );
release_dc_ptr( dc );
return hdc;
}
/***********************************************************************
* NtGdiCreateCompatibleDC (win32u.@)
*/
HDC WINAPI NtGdiCreateCompatibleDC( HDC hdc )
{
DC *dc, *origDC;
HDC ret;
const struct gdi_dc_funcs *funcs;
PHYSDEV physDev = NULL;
GDI_CheckNotLock();
if (hdc)
{
if (!(origDC = get_dc_ptr( hdc ))) return 0;
physDev = GET_DC_PHYSDEV( origDC, pCreateCompatibleDC );
funcs = physDev->funcs;
release_dc_ptr( origDC );
}
else funcs = DRIVER_load_driver( L"display" );
if (!(dc = alloc_dc_ptr( NTGDI_OBJ_MEMDC ))) return 0;
TRACE("(%p): returning %p\n", hdc, dc->hSelf );
dc->hBitmap = GDI_inc_ref_count( get_stock_object( DEFAULT_BITMAP ));
dc->attr->vis_rect.left = 0;
dc->attr->vis_rect.top = 0;
dc->attr->vis_rect.right = 1;
dc->attr->vis_rect.bottom = 1;
dc->device_rect = dc->attr->vis_rect;
ret = dc->hSelf;
if (funcs->pCreateCompatibleDC && !funcs->pCreateCompatibleDC( physDev, &dc->physDev ))
{
WARN("creation aborted by device\n");
free_dc_ptr( dc );
return 0;
}
if (!dib_driver.pCreateDC( &dc->physDev, NULL, NULL, NULL, NULL ))
{
free_dc_ptr( dc );
return 0;
}
physDev = GET_DC_PHYSDEV( dc, pSelectBitmap );
physDev->funcs->pSelectBitmap( physDev, dc->hBitmap );
DC_InitDC( dc );
release_dc_ptr( dc );
return ret;
}
/***********************************************************************
* NtGdiResetDC (win32u.@)
*/
BOOL WINAPI NtGdiResetDC( HDC hdc, const DEVMODEW *devmode, BOOL *banding,
DRIVER_INFO_2W *driver_info, void *dev )
{
DC *dc;
BOOL ret = FALSE;
if ((dc = get_dc_ptr( hdc )))
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pResetDC );
ret = physdev->funcs->pResetDC( physdev, devmode ) != 0;
if (ret) /* reset the visible region */
{
dc->dirty = 0;
dc->attr->vis_rect.left = 0;
dc->attr->vis_rect.top = 0;
dc->attr->vis_rect.right = NtGdiGetDeviceCaps( hdc, DESKTOPHORZRES );
dc->attr->vis_rect.bottom = NtGdiGetDeviceCaps( hdc, DESKTOPVERTRES );
if (dc->hVisRgn) NtGdiDeleteObjectApp( dc->hVisRgn );
dc->hVisRgn = 0;
update_dc_clipping( dc );
}
release_dc_ptr( dc );
}
return ret;
}
/***********************************************************************
* NtGdiGetDeviceCaps (win32u.@)
*/
INT WINAPI NtGdiGetDeviceCaps( HDC hdc, INT cap )
{
DC *dc;
INT ret = 0;
if ((dc = get_dc_ptr( hdc )))
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pGetDeviceCaps );
ret = physdev->funcs->pGetDeviceCaps( physdev, cap );
release_dc_ptr( dc );
}
return ret;
}
static BOOL set_graphics_mode( DC *dc, int mode )
{
if (mode == dc->attr->graphics_mode) return TRUE;
if (mode <= 0 || mode > GM_LAST) return FALSE;
/* One would think that setting the graphics mode to GM_COMPATIBLE
* would also reset the world transformation matrix to the unity
* matrix. However, in Windows, this is not the case. This doesn't
* make a lot of sense to me, but that's the way it is.
*/
dc->attr->graphics_mode = mode;
/* font metrics depend on the graphics mode */
NtGdiSelectFont(dc->hSelf, dc->hFont);
return TRUE;
}
/***********************************************************************
* NtGdiGetAndSetDCDword (win32u.@)
*/
BOOL WINAPI NtGdiGetAndSetDCDword( HDC hdc, UINT method, DWORD value, DWORD *prev_value )
{
PHYSDEV physdev;
BOOL ret = TRUE;
DWORD prev;
DC *dc;
if (!(dc = get_dc_ptr( hdc ))) return 0;
switch (method)
{
case NtGdiSetMapMode:
prev = dc->attr->map_mode;
ret = set_map_mode( dc, value );
break;
case NtGdiSetBkColor:
prev = dc->attr->background_color;
set_bk_color( dc, value );
break;
case NtGdiSetTextColor:
prev = dc->attr->text_color;
set_text_color( dc, value );
break;
case NtGdiSetDCBrushColor:
physdev = GET_DC_PHYSDEV( dc, pSetDCBrushColor );
prev = dc->attr->brush_color;
value = physdev->funcs->pSetDCBrushColor( physdev, value );
if (value != CLR_INVALID) dc->attr->brush_color = value;
break;
case NtGdiSetDCPenColor:
physdev = GET_DC_PHYSDEV( dc, pSetDCPenColor );
prev = dc->attr->pen_color;
value = physdev->funcs->pSetDCPenColor( physdev, value );
if (value != CLR_INVALID) dc->attr->pen_color = value;
break;
case NtGdiSetGraphicsMode:
prev = dc->attr->graphics_mode;
ret = set_graphics_mode( dc, value );
break;
default:
WARN( "unknown method %u\n", method );
ret = FALSE;
break;
}
release_dc_ptr( dc );
if (!ret || !prev_value) return FALSE;
*prev_value = prev;
return TRUE;
}
/***********************************************************************
* NtGdiSetBrushOrg (win32u.@)
*/
BOOL WINAPI NtGdiSetBrushOrg( HDC hdc, INT x, INT y, POINT *oldorg )
{
DC *dc;
if (!(dc = get_dc_ptr( hdc ))) return FALSE;
if (oldorg) *oldorg = dc->attr->brush_org;
dc->attr->brush_org.x = x;
dc->attr->brush_org.y = y;
release_dc_ptr( dc );
return TRUE;
}
/***********************************************************************
* NtGdiGetTransform (win32u.@)
*
* Undocumented
*
* Returns one of the co-ordinate space transforms
*
* PARAMS
* hdc [I] Device context.
* which [I] Which xform to return:
* 0x203 World -> Page transform (that set by SetWorldTransform).
* 0x304 Page -> Device transform (the mapping mode transform).
* 0x204 World -> Device transform (the combination of the above two).
* 0x402 Device -> World transform (the inversion of the above).
* xform [O] The xform.
*
*/
BOOL WINAPI NtGdiGetTransform( HDC hdc, DWORD which, XFORM *xform )
{
BOOL ret = TRUE;
DC *dc = get_dc_ptr( hdc );
if (!dc) return FALSE;
switch(which)
{
case 0x203:
*xform = dc->xformWorld2Wnd;
break;
case 0x304:
construct_window_to_viewport(dc, xform);
break;
case 0x204:
*xform = dc->xformWorld2Vport;
break;
case 0x402:
*xform = dc->xformVport2World;
break;
default:
FIXME("Unknown code %x\n", which);
ret = FALSE;
}
release_dc_ptr( dc );
return ret;
}
/***********************************************************************
* SetDCHook (win32u.@)
*
* Note: this doesn't exist in Win32, we add it here because user32 needs it.
*/
BOOL WINAPI SetDCHook( HDC hdc, DCHOOKPROC hookProc, DWORD_PTR dwHookData )
{
DC *dc = get_dc_ptr( hdc );
if (!dc) return FALSE;
dc->dwHookData = dwHookData;
dc->hookProc = hookProc;
release_dc_ptr( dc );
return TRUE;
}
/***********************************************************************
* GetDCHook (win32u.@)
*
* Note: this doesn't exist in Win32, we add it here because user32 needs it.
*/
DWORD_PTR WINAPI GetDCHook( HDC hdc, DCHOOKPROC *proc )
{
DC *dc = get_dc_ptr( hdc );
DWORD_PTR ret;
if (!dc) return 0;
if (proc) *proc = dc->hookProc;
ret = dc->dwHookData;
release_dc_ptr( dc );
return ret;
}
/***********************************************************************
* SetHookFlags (win32u.@)
*
* Note: this doesn't exist in Win32, we add it here because user32 needs it.
*/
WORD WINAPI SetHookFlags( HDC hdc, WORD flags )
{
DC *dc = get_dc_obj( hdc ); /* not get_dc_ptr, this needs to work from any thread */
LONG ret = 0;
if (!dc) return 0;
TRACE("hDC %p, flags %04x\n",hdc,flags);
if (flags & DCHF_INVALIDATEVISRGN)
ret = InterlockedExchange( &dc->dirty, 1 );
else if (flags & DCHF_VALIDATEVISRGN || !flags)
ret = InterlockedExchange( &dc->dirty, 0 );
if (flags & DCHF_DISABLEDC)
ret = InterlockedExchange( &dc->attr->disabled, 1 );
else if (flags & DCHF_ENABLEDC)
ret = InterlockedExchange( &dc->attr->disabled, 0 );
GDI_ReleaseObj( hdc );
if (flags & DCHF_RESETDC) ret = reset_dc_state( hdc );
return ret;
}
/***********************************************************************
* NtGdiGetDeviceGammaRamp (win32u.@)
*/
BOOL WINAPI NtGdiGetDeviceGammaRamp( HDC hdc, void *ptr )
{
BOOL ret = FALSE;
DC *dc = get_dc_ptr( hdc );
TRACE("%p, %p\n", hdc, ptr);
if( dc )
{
if (get_gdi_object_type( hdc ) != NTGDI_OBJ_MEMDC)
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pGetDeviceGammaRamp );
ret = physdev->funcs->pGetDeviceGammaRamp( physdev, ptr );
}
else SetLastError( ERROR_INVALID_PARAMETER );
release_dc_ptr( dc );
}
return ret;
}
static BOOL check_gamma_ramps(void *ptr)
{
WORD *ramp = ptr;
while (ramp < (WORD*)ptr + 3 * 256)
{
float r_x, r_y, r_lx, r_ly, r_d, r_v, r_e, g_avg, g_min, g_max;
unsigned i, f, l, g_n, c;
f = ramp[0];
l = ramp[255];
if (f >= l)
{
TRACE("inverted or flat gamma ramp (%d->%d), rejected\n", f, l);
return FALSE;
}
r_d = l - f;
g_min = g_max = g_avg = 0.0;
/* check gamma ramp entries to estimate the gamma */
TRACE("analyzing gamma ramp (%d->%d)\n", f, l);
for (i=1, g_n=0; i<255; i++)
{
if (ramp[i] < f || ramp[i] > l)
{
TRACE("strange gamma ramp ([%d]=%d for %d->%d), rejected\n", i, ramp[i], f, l);
return FALSE;
}
c = ramp[i] - f;
if (!c) continue; /* avoid log(0) */
/* normalize entry values into 0..1 range */
r_x = i/255.0; r_y = c / r_d;
/* compute logarithms of values */
r_lx = log(r_x); r_ly = log(r_y);
/* compute gamma for this entry */
r_v = r_ly / r_lx;
/* compute differential (error estimate) for this entry */
/* some games use table-based logarithms that magnifies the error by 128 */
r_e = -r_lx * 128 / (c * r_lx * r_lx);
/* compute min & max while compensating for estimated error */
if (!g_n || g_min > (r_v + r_e)) g_min = r_v + r_e;
if (!g_n || g_max < (r_v - r_e)) g_max = r_v - r_e;
/* add to average */
g_avg += r_v;
g_n++;
}
if (!g_n)
{
TRACE("no gamma data, shouldn't happen\n");
return FALSE;
}
g_avg /= g_n;
TRACE("low bias is %d, high is %d, gamma is %5.3f\n", f, 65535-l, g_avg);
/* check that the gamma is reasonably uniform across the ramp */
if (g_max - g_min > 12.8)
{
TRACE("ramp not uniform (max=%f, min=%f, avg=%f), rejected\n", g_max, g_min, g_avg);
return FALSE;
}
/* check that the gamma is not too bright */
if (g_avg < 0.2)
{
TRACE("too bright gamma ( %5.3f), rejected\n", g_avg);
return FALSE;
}
ramp += 256;
}
return TRUE;
}
/***********************************************************************
* NtGdiSetDeviceGammaRamp (win32u.@)
*/
BOOL WINAPI NtGdiSetDeviceGammaRamp( HDC hdc, void *ptr )
{
BOOL ret = FALSE;
DC *dc = get_dc_ptr( hdc );
TRACE( "%p, %p\n", hdc, ptr );
if( dc )
{
if (get_gdi_object_type( hdc ) != NTGDI_OBJ_MEMDC)
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetDeviceGammaRamp );
if (check_gamma_ramps(ptr))
ret = physdev->funcs->pSetDeviceGammaRamp( physdev, ptr );
}
else SetLastError( ERROR_INVALID_PARAMETER );
release_dc_ptr( dc );
}
return ret;
}
/***********************************************************************
* NtGdiGetBoundsRect (win32u.@)
*/
UINT WINAPI NtGdiGetBoundsRect( HDC hdc, RECT *rect, UINT flags )
{
PHYSDEV physdev;
RECT device_rect;
UINT ret;
DC *dc = get_dc_ptr( hdc );
if ( !dc ) return 0;
physdev = GET_DC_PHYSDEV( dc, pGetBoundsRect );
ret = physdev->funcs->pGetBoundsRect( physdev, &device_rect, DCB_RESET );
if (!ret)
{
release_dc_ptr( dc );
return 0;
}
if (dc->bounds_enabled && ret == DCB_SET) add_bounds_rect( &dc->bounds, &device_rect );
if (rect)
{
if (is_rect_empty( &dc->bounds ))
{
rect->left = rect->top = rect->right = rect->bottom = 0;
ret = DCB_RESET;
}
else
{
*rect = dc->bounds;
rect->left = max( rect->left, 0 );
rect->top = max( rect->top, 0 );
rect->right = min( rect->right, dc->attr->vis_rect.right - dc->attr->vis_rect.left );
rect->bottom = min( rect->bottom, dc->attr->vis_rect.bottom - dc->attr->vis_rect.top );
ret = DCB_SET;
}
dp_to_lp( dc, (POINT *)rect, 2 );
}
else ret = 0;
if (flags & DCB_RESET) reset_bounds( &dc->bounds );
release_dc_ptr( dc );
return ret;
}
/***********************************************************************
* NtGdiSetBoundsRect (win32u.@)
*/
UINT WINAPI NtGdiSetBoundsRect( HDC hdc, const RECT *rect, UINT flags )
{
PHYSDEV physdev;
UINT ret;
DC *dc;
if ((flags & DCB_ENABLE) && (flags & DCB_DISABLE)) return 0;
if (!(dc = get_dc_ptr( hdc ))) return 0;
physdev = GET_DC_PHYSDEV( dc, pSetBoundsRect );
ret = physdev->funcs->pSetBoundsRect( physdev, &dc->bounds, flags );
if (!ret)
{
release_dc_ptr( dc );
return 0;
}
ret = (dc->bounds_enabled ? DCB_ENABLE : DCB_DISABLE) |
(is_rect_empty( &dc->bounds ) ? ret & DCB_SET : DCB_SET);
if (flags & DCB_RESET) reset_bounds( &dc->bounds );
if ((flags & DCB_ACCUMULATE) && rect)
{
RECT rc = *rect;
lp_to_dp( dc, (POINT *)&rc, 2 );
add_bounds_rect( &dc->bounds, &rc );
}
if (flags & DCB_ENABLE) dc->bounds_enabled = TRUE;
if (flags & DCB_DISABLE) dc->bounds_enabled = FALSE;
release_dc_ptr( dc );
return ret;
}
/***********************************************************************
* NtGdiSetLayout (win32u.@)
*
* Sets left->right or right->left text layout flags of a dc.
*
*/
DWORD WINAPI NtGdiSetLayout( HDC hdc, LONG wox, DWORD layout )
{
DWORD old_layout = GDI_ERROR;
DC *dc;
if ((dc = get_dc_ptr( hdc )))
{
old_layout = dc->attr->layout;
dc->attr->layout = layout;
if (layout != old_layout)
{
if (layout & LAYOUT_RTL) dc->attr->map_mode = MM_ANISOTROPIC;
DC_UpdateXforms( dc );
}
release_dc_ptr( dc );
}
TRACE("hdc : %p, old layout : %08x, new layout : %08x\n", hdc, old_layout, layout);
return old_layout;
}
/**********************************************************************
* get_icm_profile (win32u.@)
*/
BOOL get_icm_profile( HDC hdc, BOOL allow_default, DWORD *size, WCHAR *filename )
{
PHYSDEV physdev;
DC *dc;
BOOL ret;
if (!(dc = get_dc_ptr(hdc))) return FALSE;
physdev = GET_DC_PHYSDEV( dc, pGetICMProfile );
ret = physdev->funcs->pGetICMProfile( physdev, allow_default, size, filename );
release_dc_ptr(dc);
return ret;
}
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