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/** \file
* \brief EMF Printer Driver (Win32 Only)
*
* See Copyright Notice in cd.h
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <windows.h>
#include "cdcairoctx.h"
#include "cdprint.h"
#include "cairo-win32.h"
static void cdkillcanvas(cdCtxCanvas *ctxcanvas)
{
cairo_surface_t* surface = cairo_get_target(ctxcanvas->cr);
HDC hDC = cairo_win32_surface_get_dc(surface);
HENHMETAFILE hEMF;
cairo_surface_finish(surface);
hEMF = CloseEnhMetaFile (hDC);
DeleteEnhMetaFile (hEMF);
cdcairoKillCanvas(ctxcanvas);
}
static void cdflush(cdCtxCanvas *ctxcanvas)
{
(void)ctxcanvas;
/* does nothing in EMF */
}
static void cdcreatecanvas(cdCanvas* canvas, void *data)
{
cdCtxCanvas* ctxcanvas;
char* strdata = (char*)data;
int w = 0, h = 0;
double xres, yres;
FILE* file;
char filename[10240] = "";
HDC ScreenDC, hDC;
RECT rect;
HRGN clip_hrgn;
/* Inicializa parametros */
if (strdata == NULL)
return;
strdata += cdGetFileName(strdata, filename);
if (filename[0] == 0)
return;
sscanf(strdata,"%dx%d", &w, &h);
if (w == 0 || h == 0)
return;
/* Verifica se o arquivo pode ser aberto para escrita */
file = fopen(filename, "wb");
if (file == NULL) return;
fclose(file);
ScreenDC = GetDC(NULL);
/* LOGPIXELS can not be used for EMF */
xres = (double)GetDeviceCaps(ScreenDC, HORZRES) / (double)GetDeviceCaps(ScreenDC, HORZSIZE);
yres = (double)GetDeviceCaps(ScreenDC, VERTRES) / (double)GetDeviceCaps(ScreenDC, VERTSIZE);
/* The rectangle dimensions are given in hundredths of a millimeter */
rect.left = 0;
rect.top = 0;
rect.right = (int)(100. * w / xres);
rect.bottom = (int)(100. * h / yres);
hDC = CreateEnhMetaFile(ScreenDC,filename,&rect,NULL);
ReleaseDC(NULL, ScreenDC);
if(!hDC)
return;
canvas->w = w;
canvas->h = h;
canvas->xres = xres;
canvas->yres = yres;
canvas->w_mm = ((double)w) / xres;
canvas->h_mm = ((double)h) / yres;
canvas->bpp = 24;
/* The DC will be queried for its initial clip extents, and this will be used as the size of the cairo surface. */
clip_hrgn = CreateRectRgn(0, 0, canvas->w, canvas->h);
SelectClipRgn(hDC, clip_hrgn);
DeleteObject(clip_hrgn);
ctxcanvas = cdcairoCreateCanvas(canvas, cairo_create(cairo_win32_printing_surface_create(hDC)));
}
static void cdinittable(cdCanvas* canvas)
{
cdcairoInitTable(canvas);
canvas->cxFlush = cdflush;
canvas->cxKillCanvas = cdkillcanvas;
}
static cdContext cdEMFCairoContext =
{
CD_CAP_ALL & ~(CD_CAP_PLAY | CD_CAP_YAXIS | CD_CAP_REGION | CD_CAP_GETIMAGERGB |
CD_CAP_WRITEMODE | CD_CAP_PALETTE | CD_CAP_IMAGESRV),
0,
cdcreatecanvas,
cdinittable,
NULL,
NULL,
};
cdContext* cdContextCairoEMF(void)
{
return &cdEMFCairoContext;
}
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