int gdi_InvalidateRegion(HGDI_DC hdc, int x, int y, int w, int h)
{
GDI_RECT inv;
GDI_RECT rgn;
HGDI_RGN invalid;
HGDI_BITMAP bmp;
if (hdc->hwnd == NULL)
return 0;
if (hdc->hwnd->invalid == NULL)
return 0;
invalid = hdc->hwnd->invalid;
bmp = (HGDI_BITMAP) hdc->selectedObject;
if (invalid->null)
{
invalid->x = x;
invalid->y = y;
invalid->w = w;
invalid->h = h;
invalid->null = 0;
return 0;
}
gdi_CRgnToRect(x, y, w, h, &rgn);
gdi_RgnToRect(invalid, &inv);
if (rgn.left < 0)
rgn.left = 0;
if (rgn.top < 0)
rgn.top = 0;
if (rgn.left < inv.left)
inv.left = rgn.left;
if (rgn.top < inv.top)
inv.top = rgn.top;
if (rgn.right > inv.right)
inv.right = rgn.right;
if (rgn.bottom > inv.bottom)
inv.bottom = rgn.bottom;
gdi_RectToRgn(&inv, invalid);
return 0;
}
INLINE BOOL gdi_InvalidateRegion(HGDI_DC hdc, int x, int y, int w, int h)
{
GDI_RECT inv;
GDI_RECT rgn;
HGDI_RGN invalid;
HGDI_RGN cinvalid;
if (!hdc->hwnd)
return TRUE;
if (!hdc->hwnd->invalid)
return TRUE;
if (w == 0 || h == 0)
return TRUE;
cinvalid = hdc->hwnd->cinvalid;
if ((hdc->hwnd->ninvalid + 1) > hdc->hwnd->count)
{
int new_cnt;
HGDI_RGN new_rgn;
new_cnt = hdc->hwnd->count * 2;
new_rgn = (HGDI_RGN) realloc(cinvalid, sizeof(GDI_RGN) * new_cnt);
if (!new_rgn)
return FALSE;
hdc->hwnd->count = new_cnt;
cinvalid = new_rgn;
}
gdi_SetRgn(&cinvalid[hdc->hwnd->ninvalid++], x, y, w, h);
hdc->hwnd->cinvalid = cinvalid;
invalid = hdc->hwnd->invalid;
if (invalid->null)
{
invalid->x = x;
invalid->y = y;
invalid->w = w;
invalid->h = h;
invalid->null = 0;
return TRUE;
}
gdi_CRgnToRect(x, y, w, h, &rgn);
gdi_RgnToRect(invalid, &inv);
if (rgn.left < 0)
rgn.left = 0;
if (rgn.top < 0)
rgn.top = 0;
if (rgn.left < inv.left)
inv.left = rgn.left;
if (rgn.top < inv.top)
inv.top = rgn.top;
if (rgn.right > inv.right)
inv.right = rgn.right;
if (rgn.bottom > inv.bottom)
inv.bottom = rgn.bottom;
gdi_RectToRgn(&inv, invalid);
return TRUE;
}
BOOL gdi_ClipCoords(HGDI_DC hdc, INT32* x, INT32* y, INT32* w, INT32* h,
INT32* srcx, INT32* srcy)
{
GDI_RECT bmp;
GDI_RECT clip;
GDI_RECT coords;
HGDI_BITMAP hBmp;
int dx = 0;
int dy = 0;
BOOL draw = TRUE;
if (hdc == NULL)
return FALSE;
hBmp = (HGDI_BITMAP) hdc->selectedObject;
if (hBmp != NULL)
{
if (hdc->clip->null)
{
gdi_CRgnToRect(0, 0, hBmp->width, hBmp->height, &clip);
}
else
{
gdi_RgnToRect(hdc->clip, &clip);
gdi_CRgnToRect(0, 0, hBmp->width, hBmp->height, &bmp);
if (clip.left < bmp.left)
clip.left = bmp.left;
if (clip.right > bmp.right)
clip.right = bmp.right;
if (clip.top < bmp.top)
clip.top = bmp.top;
if (clip.bottom > bmp.bottom)
clip.bottom = bmp.bottom;
}
}
else
{
gdi_RgnToRect(hdc->clip, &clip);
}
gdi_CRgnToRect(*x, *y, *w, *h, &coords);
if (coords.right >= clip.left && coords.left <= clip.right &&
coords.bottom >= clip.top && coords.top <= clip.bottom)
{
/* coordinates overlap with clipping region */
if (coords.left < clip.left)
{
dx = (clip.left - coords.left);
coords.left = clip.left;
}
if (coords.right > clip.right)
coords.right = clip.right;
if (coords.top < clip.top)
{
dy = (clip.top - coords.top);
coords.top = clip.top;
}
if (coords.bottom > clip.bottom)
coords.bottom = clip.bottom;
}
else
{
/* coordinates do not overlap with clipping region */
coords.left = 0;
coords.right = 0;
coords.top = 0;
coords.bottom = 0;
draw = FALSE;
}
if (srcx != NULL)
*srcx += dx;
if (srcy != NULL)
*srcy += dy;
gdi_RectToCRgn(&coords, x, y, w, h);
return draw;
}
INLINE int gdi_InvalidateRegion(HGDI_DC hdc, int x, int y, int w, int h)
{
GDI_RECT inv;
GDI_RECT rgn;
HGDI_RGN invalid;
HGDI_RGN cinvalid;
if (hdc->hwnd == NULL)
return 0;
if (hdc->hwnd->invalid == NULL)
return 0;
cinvalid = hdc->hwnd->cinvalid;
if (hdc->hwnd->ninvalid + 1 > hdc->hwnd->count)
{
hdc->hwnd->count *= 2;
cinvalid = (HGDI_RGN) realloc(cinvalid, sizeof(GDI_RGN) * (hdc->hwnd->count));
}
gdi_SetRgn(&cinvalid[hdc->hwnd->ninvalid++], x, y, w, h);
hdc->hwnd->cinvalid = cinvalid;
invalid = hdc->hwnd->invalid;
if (invalid->null)
{
invalid->x = x;
invalid->y = y;
invalid->w = w;
invalid->h = h;
invalid->null = 0;
return 0;
}
gdi_CRgnToRect(x, y, w, h, &rgn);
gdi_RgnToRect(invalid, &inv);
if (rgn.left < 0)
rgn.left = 0;
if (rgn.top < 0)
rgn.top = 0;
if (rgn.left < inv.left)
inv.left = rgn.left;
if (rgn.top < inv.top)
inv.top = rgn.top;
if (rgn.right > inv.right)
inv.right = rgn.right;
if (rgn.bottom > inv.bottom)
inv.bottom = rgn.bottom;
gdi_RectToRgn(&inv, invalid);
return 0;
}
