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pub mod freetype {
//! # Drawing UTF-8 strings with freetype/harfbuzz
//!
//! This modules is to draw UTF-8 strings with freetype/harfbuzz.
//!
//! 1. Install freetype2 and harfbuzz in your system.
//! 2. Create FreeType2 instance with createFreeType2() function.
//! 3. Load font file with loadFontData() function.
//! 4. Draw text with putText() function.
//!
//! - If thickness parameter is negative, drawing glyph is filled.
//! - If thickness parameter is positive, drawing glyph is outlined with thickness.
//! - If line_type parameter is 16(or CV_AA), drawing glyph is smooth.
use crate::{mod_prelude::*, core, sys, types};
pub mod prelude {
pub use { super::FreeType2Const, super::FreeType2 };
}
/// Create FreeType2 Instance
///
/// The function createFreeType2 create instance to draw UTF-8 strings.
#[inline]
pub fn create_free_type2() -> Result<core::Ptr<dyn crate::freetype::FreeType2>> {
return_send!(via ocvrs_return);
unsafe { sys::cv_freetype_createFreeType2(ocvrs_return.as_mut_ptr()) };
return_receive!(unsafe ocvrs_return => ret);
let ret = ret.into_result()?;
let ret = unsafe { core::Ptr::<dyn crate::freetype::FreeType2>::opencv_from_extern(ret) };
Ok(ret)
}
/// Constant methods for [crate::freetype::FreeType2]
pub trait FreeType2Const: core::AlgorithmTraitConst {
fn as_raw_FreeType2(&self) -> *const c_void;
}
pub trait FreeType2: core::AlgorithmTrait + crate::freetype::FreeType2Const {
fn as_raw_mut_FreeType2(&mut self) -> *mut c_void;
/// Load font data.
///
/// The function loadFontData loads font data.
///
/// ## Parameters
/// * fontFileName: FontFile Name
/// * idx: face_index to select a font faces in a single file.
#[inline]
fn load_font_data(&mut self, font_file_name: &str, idx: i32) -> Result<()> {
extern_container_arg!(mut font_file_name);
return_send!(via ocvrs_return);
unsafe { sys::cv_freetype_FreeType2_loadFontData_String_int(self.as_raw_mut_FreeType2(), font_file_name.opencv_as_extern_mut(), idx, ocvrs_return.as_mut_ptr()) };
return_receive!(unsafe ocvrs_return => ret);
let ret = ret.into_result()?;
Ok(ret)
}
/// Set Split Number from Bezier-curve to line
///
/// The function setSplitNumber set the number of split points from bezier-curve to line.
/// If you want to draw large glyph, large is better.
/// If you want to draw small glyph, small is better.
///
/// ## Parameters
/// * num: number of split points from bezier-curve to line
#[inline]
fn set_split_number(&mut self, num: i32) -> Result<()> {
return_send!(via ocvrs_return);
unsafe { sys::cv_freetype_FreeType2_setSplitNumber_int(self.as_raw_mut_FreeType2(), num, ocvrs_return.as_mut_ptr()) };
return_receive!(unsafe ocvrs_return => ret);
let ret = ret.into_result()?;
Ok(ret)
}
/// Draws a text string.
///
/// The function putText renders the specified text string in the image. Symbols that cannot be rendered using the specified font are replaced by "Tofu" or non-drawn.
///
/// ## Parameters
/// * img: Image. (Only 8UC1/8UC3/8UC4 2D mat is supported.)
/// * text: Text string to be drawn.
/// * org: Bottom-left/Top-left corner of the text string in the image.
/// * fontHeight: Drawing font size by pixel unit.
/// * color: Text color.
/// * thickness: Thickness of the lines used to draw a text when negative, the glyph is filled. Otherwise, the glyph is drawn with this thickness.
/// * line_type: Line type. See the line for details.
/// * bottomLeftOrigin: When true, the image data origin is at the bottom-left corner. Otherwise, it is at the top-left corner.
#[inline]
fn put_text(&mut self, img: &mut dyn core::ToInputOutputArray, text: &str, org: core::Point, font_height: i32, color: core::Scalar, thickness: i32, line_type: i32, bottom_left_origin: bool) -> Result<()> {
extern_container_arg!(img);
extern_container_arg!(text);
return_send!(via ocvrs_return);
unsafe { sys::cv_freetype_FreeType2_putText_const__InputOutputArrayR_const_StringR_Point_int_Scalar_int_int_bool(self.as_raw_mut_FreeType2(), img.as_raw__InputOutputArray(), text.opencv_as_extern(), org.opencv_as_extern(), font_height, color.opencv_as_extern(), thickness, line_type, bottom_left_origin, ocvrs_return.as_mut_ptr()) };
return_receive!(unsafe ocvrs_return => ret);
let ret = ret.into_result()?;
Ok(ret)
}
/// Calculates the width and height of a text string.
///
/// The function getTextSize calculates and returns the approximate size of a box that contains the specified text.
/// That is, the following code renders some text, the tight box surrounding it, and the baseline: :
/// ```C++
/// String text = "Funny text inside the box";
/// int fontHeight = 60;
/// int thickness = -1;
/// int linestyle = LINE_8;
///
/// Mat img(600, 800, CV_8UC3, Scalar::all(0));
///
/// int baseline=0;
///
/// cv::Ptr<cv::freetype::FreeType2> ft2;
/// ft2 = cv::freetype::createFreeType2();
/// ft2->loadFontData( "./mplus-1p-regular.ttf", 0 );
///
/// Size textSize = ft2->getTextSize(text,
/// fontHeight,
/// thickness,
/// &baseline);
///
/// if(thickness > 0){
/// baseline += thickness;
/// }
///
/// // center the text
/// Point textOrg((img.cols - textSize.width) / 2,
/// (img.rows + textSize.height) / 2);
///
/// // draw the box
/// rectangle(img, textOrg + Point(0, baseline),
/// textOrg + Point(textSize.width, -textSize.height),
/// Scalar(0,255,0),1,8);
///
/// // ... and the baseline first
/// line(img, textOrg + Point(0, thickness),
/// textOrg + Point(textSize.width, thickness),
/// Scalar(0, 0, 255),1,8);
///
/// // then put the text itself
/// ft2->putText(img, text, textOrg, fontHeight,
/// Scalar::all(255), thickness, linestyle, true );
/// ```
///
///
/// ## Parameters
/// * text: Input text string.
/// * fontHeight: Drawing font size by pixel unit.
/// * thickness: Thickness of lines used to render the text. See putText for details.
/// * baseLine:[out] y-coordinate of the baseline relative to the bottom-most text
/// point.
/// ## Returns
/// The size of a box that contains the specified text.
/// ## See also
/// cv::putText
#[inline]
fn get_text_size(&mut self, text: &str, font_height: i32, thickness: i32, base_line: &mut i32) -> Result<core::Size> {
extern_container_arg!(text);
return_send!(via ocvrs_return);
unsafe { sys::cv_freetype_FreeType2_getTextSize_const_StringR_int_int_intX(self.as_raw_mut_FreeType2(), text.opencv_as_extern(), font_height, thickness, base_line, ocvrs_return.as_mut_ptr()) };
return_receive!(unsafe ocvrs_return => ret);
let ret = ret.into_result()?;
Ok(ret)
}
}
}