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use crate::{Context, Object, PixelBuffer, PixelFormat};
use glib::translate::*;
use std::{fmt, mem, ptr};
glib_wrapper! {
pub struct Bitmap(Object<ffi::CoglBitmap, BitmapClass>) @extends Object;
match fn {
get_type => || ffi::cogl_bitmap_get_gtype(),
}
}
impl Bitmap {
/// Creates a bitmap using some existing data. The data is not copied
/// so the application must keep the buffer alive for the lifetime of
/// the `Bitmap`. This can be used for example with
/// `Framebuffer::read_pixels_into_bitmap` to read data directly
/// into an application buffer with the specified rowstride.
/// ## `context`
/// A `Context`
/// ## `width`
/// The width of the bitmap.
/// ## `height`
/// The height of the bitmap.
/// ## `format`
/// The format of the pixel data.
/// ## `rowstride`
/// The rowstride of the bitmap (the number of bytes from
/// the start of one row of the bitmap to the next).
/// ## `data`
/// A pointer to the data. The bitmap will take ownership of this data.
///
/// # Returns
///
/// A new `Bitmap`.
pub fn new_for_data(
context: &Context,
width: i32,
height: i32,
format: PixelFormat,
rowstride: i32,
data: &[u8],
) -> Bitmap {
unsafe {
from_glib_full(ffi::cogl_bitmap_new_for_data(
context.to_glib_none().0,
width,
height,
format.to_glib(),
rowstride,
data.to_glib_none().0,
))
}
}
//pub fn from_buffer(buffer: /*Unknown conversion*//*Unimplemented*/Buffer, format: PixelFormat, width: i32, height: i32, rowstride: i32, offset: i32) -> Bitmap {
// unsafe { TODO: call cogl_sys:cogl_bitmap_new_from_buffer() }
//}
pub fn from_file(filename: &str) -> Result<Bitmap, glib::Error> {
unsafe {
let mut error = ptr::null_mut();
let ret = ffi::cogl_bitmap_new_from_file(filename.to_glib_none().0, &mut error);
if error.is_null() {
Ok(from_glib_full(ret))
} else {
Err(from_glib_full(error))
}
}
}
pub fn with_size(context: &Context, width: u32, height: u32, format: PixelFormat) -> Bitmap {
unsafe {
from_glib_full(ffi::cogl_bitmap_new_with_size(
context.to_glib_none().0,
width,
height,
format.to_glib(),
))
}
}
///
/// # Returns
///
/// the `PixelBuffer` that this
/// buffer uses for storage. Note that if the bitmap was created with
/// `Bitmap::new_from_file` then it will not actually be using a
/// pixel buffer and this function will return `None`.
pub fn get_buffer(&self) -> Option<PixelBuffer> {
unsafe { from_glib_none(ffi::cogl_bitmap_get_buffer(self.to_glib_none().0)) }
}
///
/// # Returns
///
/// the `PixelFormat` that the data for the bitmap is in.
pub fn get_format(&self) -> PixelFormat {
unsafe { from_glib(ffi::cogl_bitmap_get_format(self.to_glib_none().0)) }
}
///
/// # Returns
///
/// the height of the bitmap
pub fn get_height(&self) -> i32 {
unsafe { ffi::cogl_bitmap_get_height(self.to_glib_none().0) }
}
///
/// # Returns
///
/// the rowstride of the bitmap. This is the number of
/// bytes between the address of start of one row to the address of the
/// next row in the image.
pub fn get_rowstride(&self) -> i32 {
unsafe { ffi::cogl_bitmap_get_rowstride(self.to_glib_none().0) }
}
///
/// # Returns
///
/// the width of the bitmap
pub fn get_width(&self) -> i32 {
unsafe { ffi::cogl_bitmap_get_width(self.to_glib_none().0) }
}
/// Parses an image file enough to extract the width and height
/// of the bitmap.
/// ## `filename`
/// the file to check
/// ## `width`
/// return location for the bitmap width, or `None`
/// ## `height`
/// return location for the bitmap height, or `None`
///
/// # Returns
///
/// `true` if the image was successfully parsed
pub fn get_size_from_file(filename: &str) -> (bool, i32, i32) {
unsafe {
let mut width = mem::MaybeUninit::uninit();
let mut height = mem::MaybeUninit::uninit();
let ret = ffi::cogl_bitmap_get_size_from_file(
filename.to_glib_none().0,
width.as_mut_ptr(),
height.as_mut_ptr(),
);
let width = width.assume_init();
let height = height.assume_init();
(ret == crate::TRUE, width, height)
}
}
}
impl fmt::Display for Bitmap {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "Bitmap")
}
}