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/** \file
* \brief Windows EMF Driver
*
* See Copyright Notice in cd.h
*/
#include <stdlib.h>
#include <stdio.h>
#include "cdwin.h"
#include "cdemf.h"
static void cdkillcanvas (cdCtxCanvas* ctxcanvas)
{
HENHMETAFILE hmf;
cdwKillCanvas(ctxcanvas);
hmf = CloseEnhMetaFile(ctxcanvas->hDC);
DeleteEnhMetaFile(hmf);
memset(ctxcanvas, 0, sizeof(cdCtxCanvas));
free(ctxcanvas);
}
/*
%F cdCreateCanvas para EMF.
O DC é um EMF em memoria.
*/
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;
/* 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);
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;
/* Inicializa driver WIN32 */
ctxcanvas = cdwCreateCanvas(canvas, NULL, hDC, CDW_EMF);
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;
ctxcanvas->clip_pnt[2].x = ctxcanvas->clip_pnt[1].x = canvas->w - 1;
ctxcanvas->clip_pnt[3].y = ctxcanvas->clip_pnt[2].y = canvas->h - 1;
}
static void cdinittable(cdCanvas* canvas)
{
cdwInitTable(canvas);
canvas->cxKillCanvas = cdkillcanvas;
}
static cdContext cdEMFContext =
{
CD_CAP_ALL & ~(CD_CAP_CLEAR | CD_CAP_YAXIS |
CD_CAP_IMAGERGBA | CD_CAP_GETIMAGERGB | CD_CAP_IMAGESRV |
CD_CAP_FPRIMTIVES ),
CD_CTX_FILE,
cdcreatecanvas,
cdinittable,
cdplayEMF,
cdregistercallbackEMF
};
cdContext* cdContextEMF(void)
{
if (cdUseContextPlus(CD_QUERY))
{
cdContext* ctx = cdGetContextPlus(CD_CTXPLUS_EMF);
if (ctx != NULL)
return ctx;
}
return &cdEMFContext;
}
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