[cairo] A newbie question about printing with Cairo on Win32

[Caleb Land]

Skipped content of type multipart/alternative-------------- next part --------------
#include <windows.h>
#include <cairo.h>
#include <math.h>

void snippet_normalize (cairo_t *cr, double width, double height)
{
    cairo_scale (cr, width, height);
    cairo_set_line_width (cr, 0.04);
}

void draw_shape(cairo_t* cr, int width, int height) {
    snippet_normalize (cr, width, height);
    cairo_set_line_width (cr, 0.16);
    cairo_move_to (cr, 0.3, 0.33);
    cairo_rel_line_to (cr, 0.2, -0.2);
    cairo_rel_line_to (cr, 0.2, 0.2);
    cairo_set_line_join (cr, CAIRO_LINE_JOIN_MITER); /* default */
    cairo_stroke (cr);
    cairo_move_to (cr, 0.3, 0.63);
    cairo_rel_line_to (cr, 0.2, -0.2);
    cairo_rel_line_to (cr, 0.2, 0.2);
    cairo_set_line_join (cr, CAIRO_LINE_JOIN_BEVEL);
    cairo_stroke (cr);
    cairo_move_to (cr, 0.3, 0.93);
    cairo_rel_line_to (cr, 0.2, -0.2);
    cairo_rel_line_to (cr, 0.2, 0.2);
    cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
    cairo_stroke (cr);
}

int main (int argc, char** argv) {
    DOCINFO di;
    PRINTDLG pd;
    HWND hwnd;
    int nError;

    // Initialize PRINTDLG
    ZeroMemory(&pd, sizeof(pd));
    pd.lStructSize = sizeof(pd);
    //pd.hwndOwner   = hwnd;
    pd.hDevMode    = NULL;     // Don't forget to free or store hDevMode
    pd.hDevNames   = NULL;     // Don't forget to free or store hDevNames
    pd.Flags       = PD_USEDEVMODECOPIESANDCOLLATE | PD_RETURNDC;
    pd.nCopies     = 1;
    pd.nFromPage   = 0xFFFF;
    pd.nToPage     = 0xFFFF;
    pd.nMinPage    = 1;
    pd.nMaxPage    = 0xFFFF;

    double width = 800, height = 800;
    
    cairo_surface_t* surface;
    cairo_t* cr;

    if (PrintDlg(&pd)==TRUE)
    {
        // GDI calls to render output.
        memset( &di, 0, sizeof(DOCINFO) );
        di.cbSize = sizeof(DOCINFO);
        di.lpszDocName = "Bitmap Printing Test";
        di.lpszOutput = (LPTSTR) NULL;
        di.lpszDatatype = (LPTSTR) NULL;
        di.fwType = 0;

        // Begin a print job by calling the StartDoc function.
        nError = StartDoc(pd.hDC, &di);

        if (nError == SP_ERROR)
        {
            //errhandler("StartDoc", hwnd);
            goto Error;
        }

        // Inform the driver that the application is about to begin
        // sending data.
        nError = StartPage(pd.hDC);
        if (nError <= 0)
        {
            goto Error;
        }
        surface = cairo_win32_surface_create(pd.hDC);
        cr = cairo_create(surface);
        cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
        
        // uncomment this line to draw with a "white" pen
        // cairo_set_source_rgb(cr, 1, 1, 1);

        draw_shape(cr, width, height);
        nError = EndPage(pd.hDC);
        if (nError <= 0)
        {
            goto Error;
        }
        // Inform the driver that document has ended.
        nError = EndDoc(pd.hDC);
        if (nError <= 0)
            //errhandler("EndDoc", hwnd);
Error:
        // clean up
        cairo_destroy(cr);
        cairo_surface_destroy (surface);
        // Delete DC when done.
        DeleteDC(pd.hDC);
    }
}