Struct CompressorImageRef

pub struct CompressorImageRef(pub *mut basisu_image);

A reference to an image being stored by CompressorParams. Generally used to insert the source data that is to be encoded by a Compressor.

Tuple Fields

0: *mut basisu_image

Implementations

impl CompressorImageRef

pub fn invalidate(&mut self)

Sets the image to be completely empty (i.e. 0 width, 0 height). (This was called clear in the upstream API.)

pub fn resize(&mut self, width: u32, height: u32)

Resizes the image to the given width/height

By default the pitch will be equal to the width. To customize this, use resize_with_pitch

pub fn resize_with_pitch(&mut self, width: u32, height: u32, pitch: u32)

Resize the image to the given width/height with a custom “pitch”. The pitch is the offset between rows and is not needed for all formats. By default, the pitch will be equal to the width

pub fn init(&mut self, data: &[u8], width: u32, height: u32, channel_count: u8)

Resize the image and populate it with the given data.

channel_count should be the number of channels in the image (so >=1 and <= 4)

pub fn pixel_at(&self, width: u32, height: u32) -> Option<ColorU8>

Returns the pixel value at a given x,y

pub unsafe fn pixel_at_unchecked(&self, width: u32, height: u32) -> ColorU8

Returns teh pixel value at a given x,y without doing bounds checking

Safety

Accessing pixel out of bounds of the image will result in undefined behavior

pub fn width(&self) -> u32

Returns the width of the image in pixels

pub fn height(&self) -> u32

Returns the height of the image in pixels

pub fn pitch(&self) -> u32

Returns the pitch of the image in pixels, which represents the offset between rows

pub fn total_pixels(&self) -> u32

Returns the total number of pixels in the image

pub fn block_width(&self, w: u32) -> u32

Returns how many blocks wide the image is, given w, the width of a block in pixels

pub fn block_height(&self, h: u32) -> u32

Returns how many blocks high the image is, given h, the height of a block in pixels

pub fn total_blocks(&self, w: u32, h: u32) -> u32

Returns the number of blocks required to store the image, given w and h, the width and height of a block in pixels

pub fn pixel_data_mut(&mut self) -> &mut [ColorU8]

Returns a mutable reference to the pixel data as a slice of ColorU8

pub fn pixel_data_u8_mut(&mut self) -> &mut [u8]

Returns a mutable reference to the pixel data as a slice of u8

pub fn pixel_data_u32_mut(&mut self) -> &mut [u32]

Returns a mutable reference to the pixel data as a slice of u32