HDC SWELL_CreateGfxContext(void *c)
{
HDC__ *ctx=SWELL_GDP_CTX_NEW();
return ctx;
}
HDC SWELL_CreateMemContext(HDC hdc, int w, int h)
{
// we could use CGLayer here, but it's 10.4+ and seems to be slower than this
// if (w&1) w++;
void *buf=calloc(w*4,h);
if (!buf) return 0;
HDC__ *ctx=SWELL_GDP_CTX_NEW();
ctx->ownedData=buf;
SetTextColor(ctx,0);
return ctx;
}
HDC SWELL_CreateMemContext(HDC hdc, int w, int h)
{
LICE_MemBitmap * bm = new LICE_MemBitmap(w,h);
if (!bm) return 0;
HDC__ *ctx=SWELL_GDP_CTX_NEW();
ctx->surface = bm;
ctx->surface_offs.x=0;
ctx->surface_offs.y=0;
ctx->dirty_rect_valid=false;
SetTextColor(ctx,0);
return ctx;
}
HDC SWELL_internalGetWindowDC(HWND h, bool calcsize_on_first)
{
if (!h || !IsWindowVisible(h)) return NULL;
int xoffs=0,yoffs=0;
int wndw = h->m_position.right-h->m_position.left;
int wndh = h->m_position.bottom-h->m_position.top;
HWND starth = h;
while (h)
{
if ((calcsize_on_first || h!=starth) && h->m_wndproc)
{
RECT r;
GetWindowContentViewRect(h,&r);
NCCALCSIZE_PARAMS p={{r,},};
h->m_wndproc(h,WM_NCCALCSIZE,FALSE,(LPARAM)&p);
RECT r2=r;
r=p.rgrc[0];
// todo: handle left edges and adjust postions/etc accordingly
if (h==starth) // if initial window, adjust rects to client area (this implies calcsize_on_first being false)
{
wndw=r.right-r.left;
wndh=r.bottom-r.top;
}
yoffs += r.top-r2.top;
xoffs += r.left-r2.left;
}
if (h->m_backingstore) break; // found our target window
xoffs += h->m_position.left;
yoffs += h->m_position.top;
h = h->m_parent;
}
if (!h) return NULL;
swell_gdpLocalContext *p = (swell_gdpLocalContext*)SWELL_GDP_CTX_NEW();
// todo: GDI defaults?
p->ctx.surface=new LICE_SubBitmap(h->m_backingstore,xoffs,yoffs,wndw,wndh);
if (xoffs<0) p->ctx.surface_offs.x = xoffs;
if (yoffs<0) p->ctx.surface_offs.y = yoffs;
p->clipr.left=xoffs;
p->clipr.top=yoffs;
p->clipr.right=xoffs + p->ctx.surface->getWidth();
p->clipr.bottom=yoffs + p->ctx.surface->getHeight();
return (HDC)p;
}
