static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_surface_t *surface;
cairo_translate (cr, PAD, PAD);
cairo_save (cr);
/* Draw overlapping circle and fallback circle */
cairo_set_source_rgb (cr, 0.0, 1.0, 0.0);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
draw_circle (cr, CIRCLE_SIZE*0.5, CIRCLE_SIZE*1.5);
cairo_set_source_rgb (cr, 1.0, 0.0, 0.0);
cairo_set_operator (cr, CAIRO_OPERATOR_ADD);
draw_circle (cr, CIRCLE_SIZE*0.75, CIRCLE_SIZE*1.75);
/* Draw circles */
cairo_set_source_rgb (cr, 0.0, 1.0, 0.0);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
cairo_translate (cr, CIRCLE_SIZE*2.5, CIRCLE_SIZE*0.6);
draw_circles (cr);
/* Draw fallback circles */
cairo_set_source_rgb (cr, 1.0, 0.0, 0.0);
cairo_set_operator (cr, CAIRO_OPERATOR_ADD);
cairo_translate (cr, 0, CIRCLE_SIZE*2);
draw_circles (cr);
cairo_restore (cr);
cairo_translate (cr, 0, CIRCLE_SIZE * 3.5);
/* Draw using fallback surface */
surface = surface_create (cr);
cairo_set_source_rgb (cr, 0.0, 1.0, 0.0);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
draw_circle (cr, CIRCLE_SIZE*0.5, CIRCLE_SIZE*1.5);
cairo_set_operator (cr, CAIRO_OPERATOR_ADD);
draw_image_circle (cr, surface, CIRCLE_SIZE/4, CIRCLE_SIZE + CIRCLE_SIZE/4);
/* Draw circles */
cairo_set_source_rgb (cr, 0.0, 1.0, 0.0);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
cairo_translate (cr, CIRCLE_SIZE*2.5, CIRCLE_SIZE*0.6);
draw_circles (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_ADD);
cairo_translate (cr, -CIRCLE_SIZE/2, CIRCLE_SIZE*1.5);
draw_image_circles (cr, surface);
cairo_surface_destroy (surface);
return CAIRO_TEST_SUCCESS;
}
void draw_shapes(IplImage *img)
{
CvScalar bkgd_clr = cvScalarAll(BACKGROUND_COLOR);
cvSet(img, bkgd_clr, 0);
draw_circles(img, 0, 3, 0);
draw_circles(img, 0, 2, 1);
draw_ellipses(img, 0, 3);
}
// Do what's necessary for the next frame of the sunshow
void do_sun_frame (double day_fraction) {
color_t *color_map;
coordinates_t center;
center.azimuth = 0;
center.az_cos = cos(center.azimuth);
center.az_sin = sin(center.azimuth);
center.elevation = 2*PI*day_fraction;
center.ele_cos = cos(center.elevation);
center.ele_sin = sin(center.elevation);
color_map = get_color_map((int) NUM_MAPS*day_fraction);
printf ("Calling draw_circles %4.2f\n", center.elevation);
draw_circles(¢er, color_map);
}
void main()
{
hires();
draw_rectangles();
draw_circles();
}
int
main (int argc, char **argv)
{
HPDF_Doc pdf;
HPDF_Page page;
char fname[256];
HPDF_Font hfont;
HPDF_ExtGState gstate;
const HPDF_REAL PAGE_WIDTH = 600;
const HPDF_REAL PAGE_HEIGHT = 900;
strcpy (fname, argv[0]);
strcat (fname, ".pdf");
pdf = HPDF_New (error_handler, NULL);
if (!pdf) {
printf ("error: cannot create PdfDoc object\n");
return 1;
}
if (setjmp(env)) {
HPDF_Free (pdf);
return 1;
}
hfont = HPDF_GetFont (pdf, "Helvetica-Bold", NULL);
/* add a new page object. */
page = HPDF_AddPage (pdf);
HPDF_Page_SetFontAndSize (page, hfont, 10);
HPDF_Page_SetHeight (page, PAGE_HEIGHT);
HPDF_Page_SetWidth (page, PAGE_WIDTH);
/* normal */
HPDF_Page_GSave (page);
draw_circles (page, "normal", 40.0f, PAGE_HEIGHT - 170);
HPDF_Page_GRestore (page);
/* transparency (0.8) */
HPDF_Page_GSave (page);
gstate = HPDF_CreateExtGState (pdf);
HPDF_ExtGState_SetAlphaFill (gstate, 0.8);
HPDF_ExtGState_SetAlphaStroke (gstate, 0.8);
HPDF_Page_SetExtGState (page, gstate);
draw_circles (page, "alpha fill = 0.8", 230.0f, PAGE_HEIGHT - 170);
HPDF_Page_GRestore (page);
/* transparency (0.4) */
HPDF_Page_GSave (page);
gstate = HPDF_CreateExtGState (pdf);
HPDF_ExtGState_SetAlphaFill (gstate, 0.4);
HPDF_Page_SetExtGState (page, gstate);
draw_circles (page, "alpha fill = 0.4", 420.0f, PAGE_HEIGHT - 170);
HPDF_Page_GRestore (page);
/* blend-mode=HPDF_BM_MULTIPLY */
HPDF_Page_GSave (page);
gstate = HPDF_CreateExtGState (pdf);
HPDF_ExtGState_SetBlendMode (gstate, HPDF_BM_MULTIPLY);
HPDF_Page_SetExtGState (page, gstate);
draw_circles (page, "HPDF_BM_MULTIPLY", 40.0f, PAGE_HEIGHT - 340);
HPDF_Page_GRestore (page);
/* blend-mode=HPDF_BM_SCREEN */
HPDF_Page_GSave (page);
gstate = HPDF_CreateExtGState (pdf);
HPDF_ExtGState_SetBlendMode (gstate, HPDF_BM_SCREEN);
HPDF_Page_SetExtGState (page, gstate);
draw_circles (page, "HPDF_BM_SCREEN", 230.0f, PAGE_HEIGHT - 340);
HPDF_Page_GRestore (page);
/* blend-mode=HPDF_BM_OVERLAY */
HPDF_Page_GSave (page);
gstate = HPDF_CreateExtGState (pdf);
HPDF_ExtGState_SetBlendMode (gstate, HPDF_BM_OVERLAY);
HPDF_Page_SetExtGState (page, gstate);
draw_circles (page, "HPDF_BM_OVERLAY", 420.0f, PAGE_HEIGHT - 340);
HPDF_Page_GRestore (page);
/* blend-mode=HPDF_BM_DARKEN */
HPDF_Page_GSave (page);
gstate = HPDF_CreateExtGState (pdf);
HPDF_ExtGState_SetBlendMode (gstate, HPDF_BM_DARKEN);
HPDF_Page_SetExtGState (page, gstate);
draw_circles (page, "HPDF_BM_DARKEN", 40.0f, PAGE_HEIGHT - 510);
HPDF_Page_GRestore (page);
/* blend-mode=HPDF_BM_LIGHTEN */
HPDF_Page_GSave (page);
gstate = HPDF_CreateExtGState (pdf);
HPDF_ExtGState_SetBlendMode (gstate, HPDF_BM_LIGHTEN);
HPDF_Page_SetExtGState (page, gstate);
draw_circles (page, "HPDF_BM_LIGHTEN", 230.0f, PAGE_HEIGHT - 510);
HPDF_Page_GRestore (page);
/* blend-mode=HPDF_BM_COLOR_DODGE */
HPDF_Page_GSave (page);
gstate = HPDF_CreateExtGState (pdf);
HPDF_ExtGState_SetBlendMode (gstate, HPDF_BM_COLOR_DODGE);
HPDF_Page_SetExtGState (page, gstate);
draw_circles (page, "HPDF_BM_COLOR_DODGE", 420.0f, PAGE_HEIGHT - 510);
HPDF_Page_GRestore (page);
/* blend-mode=HPDF_BM_COLOR_BUM */
HPDF_Page_GSave (page);
gstate = HPDF_CreateExtGState (pdf);
HPDF_ExtGState_SetBlendMode (gstate, HPDF_BM_COLOR_BUM);
HPDF_Page_SetExtGState (page, gstate);
draw_circles (page, "HPDF_BM_COLOR_BUM", 40.0f, PAGE_HEIGHT - 680);
HPDF_Page_GRestore (page);
/* blend-mode=HPDF_BM_HARD_LIGHT */
HPDF_Page_GSave (page);
gstate = HPDF_CreateExtGState (pdf);
HPDF_ExtGState_SetBlendMode (gstate, HPDF_BM_HARD_LIGHT);
HPDF_Page_SetExtGState (page, gstate);
draw_circles (page, "HPDF_BM_HARD_LIGHT", 230.0f, PAGE_HEIGHT - 680);
HPDF_Page_GRestore (page);
/* blend-mode=HPDF_BM_SOFT_LIGHT */
HPDF_Page_GSave (page);
gstate = HPDF_CreateExtGState (pdf);
HPDF_ExtGState_SetBlendMode (gstate, HPDF_BM_SOFT_LIGHT);
HPDF_Page_SetExtGState (page, gstate);
draw_circles (page, "HPDF_BM_SOFT_LIGHT", 420.0f, PAGE_HEIGHT - 680);
HPDF_Page_GRestore (page);
/* blend-mode=HPDF_BM_DIFFERENCE */
HPDF_Page_GSave (page);
gstate = HPDF_CreateExtGState (pdf);
HPDF_ExtGState_SetBlendMode (gstate, HPDF_BM_DIFFERENCE);
HPDF_Page_SetExtGState (page, gstate);
draw_circles (page, "HPDF_BM_DIFFERENCE", 40.0f, PAGE_HEIGHT - 850);
HPDF_Page_GRestore (page);
/* blend-mode=HPDF_BM_EXCLUSHON */
HPDF_Page_GSave (page);
gstate = HPDF_CreateExtGState (pdf);
HPDF_ExtGState_SetBlendMode (gstate, HPDF_BM_EXCLUSHON);
HPDF_Page_SetExtGState (page, gstate);
draw_circles (page, "HPDF_BM_EXCLUSHON", 230.0f, PAGE_HEIGHT - 850);
HPDF_Page_GRestore (page);
/* save the document to a file */
HPDF_SaveToFile (pdf, fname);
/* clean up */
HPDF_Free (pdf);
return 0;
}
