func (im *Image) AnnotateImage(x, y int, text string, fontSize int, color string) { image_info := C.CloneImageInfo(nil) defer C.DestroyImageInfo(image_info) draw_info := C.CloneDrawInfo(image_info, nil) defer C.DestroyDrawInfo(draw_info) textBytes := []byte(text) bytesPointer := unsafe.Pointer(&textBytes[0]) textArray := (*C.uchar)(bytesPointer) colorArray := C.CString(color) defer C.free(unsafe.Pointer(colorArray)) draw_context := C.DrawAllocateContext(draw_info, im.image) defer C.DrawDestroyContext(draw_context) C.DrawSetFontSize(draw_context, C.double(fontSize)) C.DrawSetStrokeColorString(draw_context, colorArray) C.DrawSetFillColorString(draw_context, colorArray) C.DrawAnnotation(draw_context, C.double(x), C.double(y), textArray) C.DrawRender(draw_context) }
// Sets the font pointsize to use when annotating with text. // // pointSize: text pointsize func (dw *DrawingWand) SetFontSize(pointSize float64) { C.DrawSetFontSize(dw.dw, C.double(pointSize)) }
// Sets canvas' default font size func (self *Canvas) SetFontSize(size float64) { self.text.Size = size C.DrawSetFontSize(self.drawing, C.double(size)) }