static BOOL get_vis_rectangles( DC *dc_dst, struct bitblt_coords *dst,
DC *dc_src, struct bitblt_coords *src )
{
RECT rect;
/* get the destination visible rectangle */
rect.left = dst->log_x;
rect.top = dst->log_y;
rect.right = dst->log_x + dst->log_width;
rect.bottom = dst->log_y + dst->log_height;
LPtoDP( dc_dst->hSelf, (POINT *)&rect, 2 );
dst->x = rect.left;
dst->y = rect.top;
dst->width = rect.right - rect.left;
dst->height = rect.bottom - rect.top;
if (dst->layout & LAYOUT_RTL && dst->layout & LAYOUT_BITMAPORIENTATIONPRESERVED)
{
dst->x += dst->width;
dst->width = -dst->width;
}
get_bounding_rect( &rect, dst->x, dst->y, dst->width, dst->height );
clip_visrect( dc_dst, &dst->visrect, &rect );
/* get the source visible rectangle */
if (!src) return !is_rect_empty( &dst->visrect );
rect.left = src->log_x;
rect.top = src->log_y;
rect.right = src->log_x + src->log_width;
rect.bottom = src->log_y + src->log_height;
LPtoDP( dc_src->hSelf, (POINT *)&rect, 2 );
src->x = rect.left;
src->y = rect.top;
src->width = rect.right - rect.left;
src->height = rect.bottom - rect.top;
if (src->layout & LAYOUT_RTL && src->layout & LAYOUT_BITMAPORIENTATIONPRESERVED)
{
src->x += src->width;
src->width = -src->width;
}
get_bounding_rect( &rect, src->x, src->y, src->width, src->height );
if (!clip_device_rect( dc_src, &src->visrect, &rect )) return FALSE;
if (is_rect_empty( &dst->visrect )) return FALSE;
return intersect_vis_rectangles( dst, src );
}
/***********************************************************************
* GetClipBox (GDI32.@)
*/
INT WINAPI GetClipBox( HDC hdc, LPRECT rect )
{
RECT visrect;
INT ret;
DC *dc = get_dc_ptr( hdc );
if (!dc) return ERROR;
update_dc( dc );
if (get_dc_region( dc ))
{
ret = GetRgnBox( get_dc_region( dc ), rect );
}
else
{
ret = is_rect_empty( &dc->vis_rect ) ? ERROR : SIMPLEREGION;
*rect = dc->vis_rect;
}
if (get_dc_device_rect( dc, &visrect ) && !intersect_rect( rect, rect, &visrect )) ret = NULLREGION;
if (dc->layout & LAYOUT_RTL)
{
int tmp = rect->left;
rect->left = rect->right - 1;
rect->right = tmp - 1;
}
DPtoLP( hdc, (LPPOINT)rect, 2 );
release_dc_ptr( dc );
TRACE("%p => %d %s\n", hdc, ret, wine_dbgstr_rect( rect ));
return ret;
}
int clip_rect_to_dib( const dib_info *dib, RECT *rc )
{
RECT rect;
rect.left = max( 0, -dib->rect.left );
rect.top = max( 0, -dib->rect.top );
rect.right = min( dib->rect.right, dib->width ) - dib->rect.left;
rect.bottom = min( dib->rect.bottom, dib->height ) - dib->rect.top;
if (is_rect_empty( &rect )) return 0;
return intersect_rect( rc, &rect, rc );
}
/***********************************************************************
* GetRandomRgn [GDI32.@]
*
* NOTES
* This function is documented in MSDN online for the case of
* iCode == SYSRGN (4).
*
* For iCode == 1 it should return the clip region
* 2 " " " the meta region
* 3 " " " the intersection of the clip with
* the meta region (== 'Rao' region).
*
* See http://www.codeproject.com/gdi/cliprgnguide.asp
*/
INT WINAPI GetRandomRgn(HDC hDC, HRGN hRgn, INT iCode)
{
INT ret = 1;
DC *dc = get_dc_ptr( hDC );
if (!dc) return -1;
switch (iCode)
{
case 1:
if (dc->hClipRgn) CombineRgn( hRgn, dc->hClipRgn, 0, RGN_COPY );
else ret = 0;
break;
case 2:
if (dc->hMetaRgn) CombineRgn( hRgn, dc->hMetaRgn, 0, RGN_COPY );
else ret = 0;
break;
case 3:
if (dc->hClipRgn && dc->hMetaRgn) CombineRgn( hRgn, dc->hClipRgn, dc->hMetaRgn, RGN_AND );
else if (dc->hClipRgn) CombineRgn( hRgn, dc->hClipRgn, 0, RGN_COPY );
else if (dc->hMetaRgn) CombineRgn( hRgn, dc->hMetaRgn, 0, RGN_COPY );
else ret = 0;
break;
case SYSRGN: /* == 4 */
update_dc( dc );
if (dc->hVisRgn)
{
CombineRgn( hRgn, dc->hVisRgn, 0, RGN_COPY );
/* On Windows NT/2000, the SYSRGN returned is in screen coordinates */
if (!(GetVersion() & 0x80000000)) OffsetRgn( hRgn, dc->vis_rect.left, dc->vis_rect.top );
}
else if (!is_rect_empty( &dc->device_rect ))
SetRectRgn( hRgn, dc->device_rect.left, dc->device_rect.top,
dc->device_rect.right, dc->device_rect.bottom );
else
ret = 0;
break;
default:
WARN("Unknown code %d\n", iCode);
ret = -1;
break;
}
release_dc_ptr( dc );
return ret;
}
void add_clipped_bounds( dibdrv_physdev *dev, const RECT *rect, HRGN clip )
{
const WINEREGION *region;
RECT rc;
if (!dev->bounds) return;
if (clip)
{
if (!(region = get_wine_region( clip ))) return;
if (!rect) rc = region->extents;
else intersect_rect( &rc, rect, ®ion->extents );
release_wine_region( clip );
}
else rc = *rect;
if (is_rect_empty( &rc )) return;
offset_rect( &rc, dev->dib.rect.left, dev->dib.rect.top );
add_bounds_rect( dev->bounds, &rc );
}
int get_clipped_rects( const dib_info *dib, const RECT *rc, HRGN clip, struct clipped_rects *clip_rects )
{
const WINEREGION *region;
RECT rect, *out = clip_rects->buffer;
int i;
init_clipped_rects( clip_rects );
rect.left = max( 0, -dib->rect.left );
rect.top = max( 0, -dib->rect.top );
rect.right = min( dib->rect.right, dib->width ) - dib->rect.left;
rect.bottom = min( dib->rect.bottom, dib->height ) - dib->rect.top;
if (is_rect_empty( &rect )) return 0;
if (rc && !intersect_rect( &rect, &rect, rc )) return 0;
if (!clip)
{
*out = rect;
clip_rects->count = 1;
return 1;
}
if (!(region = get_wine_region( clip ))) return 0;
for (i = 0; i < region->numRects; i++)
{
if (region->rects[i].top >= rect.bottom) break;
if (!intersect_rect( out, &rect, ®ion->rects[i] )) continue;
out++;
if (out == &clip_rects->buffer[sizeof(clip_rects->buffer) / sizeof(RECT)])
{
clip_rects->rects = HeapAlloc( GetProcessHeap(), 0, region->numRects * sizeof(RECT) );
if (!clip_rects->rects) return 0;
memcpy( clip_rects->rects, clip_rects->buffer, (out - clip_rects->buffer) * sizeof(RECT) );
out = clip_rects->rects + (out - clip_rects->buffer);
}
}
release_wine_region( clip );
clip_rects->count = out - clip_rects->rects;
return clip_rects->count;
}
/******************************************************************************
* GdiAlphaBlend [GDI32.@]
*/
BOOL WINAPI GdiAlphaBlend(HDC hdcDst, int xDst, int yDst, int widthDst, int heightDst,
HDC hdcSrc, int xSrc, int ySrc, int widthSrc, int heightSrc,
BLENDFUNCTION blendFunction)
{
BOOL ret = FALSE;
DC *dcDst, *dcSrc;
dcSrc = get_dc_ptr( hdcSrc );
if (!dcSrc) return FALSE;
if ((dcDst = get_dc_ptr( hdcDst )))
{
struct bitblt_coords src, dst;
update_dc( dcSrc );
update_dc( dcDst );
src.log_x = xSrc;
src.log_y = ySrc;
src.log_width = widthSrc;
src.log_height = heightSrc;
src.layout = GetLayout( hdcSrc );
dst.log_x = xDst;
dst.log_y = yDst;
dst.log_width = widthDst;
dst.log_height = heightDst;
dst.layout = GetLayout( hdcDst );
ret = !get_vis_rectangles( dcDst, &dst, dcSrc, &src );
TRACE("src %p log=%d,%d %dx%d phys=%d,%d %dx%d vis=%s dst %p log=%d,%d %dx%d phys=%d,%d %dx%d vis=%s blend=%02x/%02x/%02x/%02x\n",
hdcSrc, src.log_x, src.log_y, src.log_width, src.log_height,
src.x, src.y, src.width, src.height, wine_dbgstr_rect(&src.visrect),
hdcDst, dst.log_x, dst.log_y, dst.log_width, dst.log_height,
dst.x, dst.y, dst.width, dst.height, wine_dbgstr_rect(&dst.visrect),
blendFunction.BlendOp, blendFunction.BlendFlags,
blendFunction.SourceConstantAlpha, blendFunction.AlphaFormat );
if (src.x < 0 || src.y < 0 || src.width < 0 || src.height < 0 ||
src.log_width < 0 || src.log_height < 0 ||
(!is_rect_empty( &dcSrc->device_rect ) &&
(src.width > dcSrc->device_rect.right - dcSrc->vis_rect.left - src.x ||
src.height > dcSrc->device_rect.bottom - dcSrc->vis_rect.top - src.y)))
{
WARN( "Invalid src coords: (%d,%d), size %dx%d\n", src.x, src.y, src.width, src.height );
SetLastError( ERROR_INVALID_PARAMETER );
ret = FALSE;
}
else if (dst.log_width < 0 || dst.log_height < 0)
{
WARN( "Invalid dst coords: (%d,%d), size %dx%d\n",
dst.log_x, dst.log_y, dst.log_width, dst.log_height );
SetLastError( ERROR_INVALID_PARAMETER );
ret = FALSE;
}
else if (dcSrc == dcDst && src.x + src.width > dst.x && src.x < dst.x + dst.width &&
src.y + src.height > dst.y && src.y < dst.y + dst.height)
{
WARN( "Overlapping coords: (%d,%d), %dx%d and (%d,%d), %dx%d\n",
src.x, src.y, src.width, src.height, dst.x, dst.y, dst.width, dst.height );
SetLastError( ERROR_INVALID_PARAMETER );
ret = FALSE;
}
else if (!ret)
{
PHYSDEV src_dev = GET_DC_PHYSDEV( dcSrc, pAlphaBlend );
PHYSDEV dst_dev = GET_DC_PHYSDEV( dcDst, pAlphaBlend );
ret = dst_dev->funcs->pAlphaBlend( dst_dev, &dst, src_dev, &src, blendFunction );
}
release_dc_ptr( dcDst );
}
release_dc_ptr( dcSrc );
return ret;
}
/* return the DC device rectangle if not empty */
static inline BOOL get_dc_device_rect( DC *dc, RECT *rect )
{
*rect = dc->device_rect;
offset_rect( rect, -dc->vis_rect.left, -dc->vis_rect.top );
return !is_rect_empty( rect );
}
static inline void lock_surface( struct windrv_physdev *dev )
{
GDI_CheckNotLock();
dev->surface->funcs->lock( dev->surface );
if (is_rect_empty( dev->dibdrv->bounds )) dev->start_ticks = GetTickCount();
}