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/** \file
* \brief Cairo Native Window Driver
*
* See Copyright Notice in cd.h
*/
#include <stdlib.h>
#include <stdio.h>
#include "cdcairoctx.h"
#include "cdnative.h"
#include <windows.h>
#include <cairo-win32.h>
static void cdkillcanvas(cdCtxCanvas *ctxcanvas)
{
if (ctxcanvas->hDC)
ReleaseDC(ctxcanvas->hWnd, ctxcanvas->hDC);
cdcairoKillCanvas(ctxcanvas);
}
int cdactivate(cdCtxCanvas *ctxcanvas)
{
if (ctxcanvas->hWnd)
{
RECT rect;
GetClientRect(ctxcanvas->hWnd, &rect);
ctxcanvas->canvas->w = rect.right - rect.left;
ctxcanvas->canvas->h = rect.bottom - rect.top;
ctxcanvas->canvas->bpp = cdGetScreenColorPlanes();
}
/* Se nao e' ownwer, tem que restaurar o contexto */
if (!ctxcanvas->isOwnedDC)
{
cairo_surface_t *surface;
if (ctxcanvas->hDC) /* deactivate not called */
{
cairo_destroy(ctxcanvas->cr);
ReleaseDC(ctxcanvas->hWnd, ctxcanvas->hDC);
}
ctxcanvas->hDC = GetDC(ctxcanvas->hWnd);
surface = cairo_win32_surface_create(ctxcanvas->hDC);
ctxcanvas->cr = cairo_create(surface);
cairo_surface_destroy(surface);
}
ctxcanvas->canvas->w_mm = ((double)ctxcanvas->canvas->w) / ctxcanvas->canvas->xres;
ctxcanvas->canvas->h_mm = ((double)ctxcanvas->canvas->h) / ctxcanvas->canvas->yres;
if (ctxcanvas->canvas->use_matrix)
ctxcanvas->canvas->cxTransform(ctxcanvas, ctxcanvas->canvas->matrix);
return CD_OK;
}
static void cddeactivate(cdCtxCanvas *ctxcanvas)
{
/* If not owner, release the DC */
if (!ctxcanvas->isOwnedDC && ctxcanvas->hDC)
{
cairo_destroy(ctxcanvas->cr);
ReleaseDC(ctxcanvas->hWnd, ctxcanvas->hDC);
ctxcanvas->cr = NULL;
ctxcanvas->hDC = NULL;
}
}
static void cdcreatecanvas(cdCanvas* canvas, void *data)
{
cdCtxCanvas* ctxcanvas;
cairo_surface_t *surface;
HWND hWnd = (HWND)data;
HDC ScreenDC, hDC;
HRGN clip_hrgn;
ScreenDC = GetDC(NULL);
canvas->bpp = GetDeviceCaps(ScreenDC, BITSPIXEL);
canvas->xres = (float)(((double)GetDeviceCaps(ScreenDC, LOGPIXELSX)) / 25.4);
canvas->yres = (float)(((double)GetDeviceCaps(ScreenDC, LOGPIXELSY)) / 25.4);
ReleaseDC(NULL, ScreenDC);
if (!data)
{
hDC = GetDC(NULL);
canvas->w = GetDeviceCaps(hDC, HORZRES);
canvas->h = GetDeviceCaps(hDC, VERTRES);
}
else
{
RECT rect;
hWnd = (HWND)data;
hDC = GetDC(hWnd);
GetClientRect(hWnd, &rect);
canvas->w = rect.right - rect.left;
canvas->h = rect.bottom - rect.top;
}
/* initial clip extents controls size */
clip_hrgn = CreateRectRgn(0, 0, canvas->w, canvas->h);
SelectClipRgn(hDC, clip_hrgn);
DeleteObject(clip_hrgn);
surface = cairo_win32_surface_create(hDC);
canvas->w_mm = ((double)canvas->w) / canvas->xres;
canvas->h_mm = ((double)canvas->h) / canvas->yres;
ctxcanvas = cdcairoCreateCanvas(canvas, cairo_create(surface));
cairo_surface_destroy(surface);
ctxcanvas->hDC = hDC;
ctxcanvas->hWnd = hWnd;
if (hWnd)
{
LONG style = GetClassLong(hWnd, GCL_STYLE);
ctxcanvas->isOwnedDC = (int) ((style & CS_OWNDC) || (style & CS_CLASSDC));
}
else
ctxcanvas->isOwnedDC = 1;
}
static void cdinittable(cdCanvas* canvas)
{
cdcairoInitTable(canvas);
canvas->cxKillCanvas = cdkillcanvas;
canvas->cxActivate = cdactivate;
canvas->cxDeactivate = cddeactivate;
}
/******************************************************/
static cdContext cdNativeWindowContext =
{
CD_CAP_ALL & ~(CD_CAP_PLAY | CD_CAP_YAXIS | CD_CAP_REGION | CD_CAP_WRITEMODE | CD_CAP_PALETTE),
CD_CTX_WINDOW|CD_CTX_PLUS,
cdcreatecanvas,
cdinittable,
NULL,
NULL,
};
cdContext* cdContextCairoNativeWindow(void)
{
return &cdNativeWindowContext;
}
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