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more formatting and doc comments

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Gered 2022-06-04 16:22:51 -04:00
parent 1d9fceb98c
commit 819603ca2a
1 changed files with 40 additions and 5 deletions
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45
libretrogd/src/graphics/bitmap/blit.rs
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@ -3,15 +3,50 @@ use crate::math::*;
#[derive(Debug, Copy, Clone, PartialEq)]
pub enum BlitMethod {
/// Solid blit, no transparency or other per-pixel adjustments.
Solid,
/// Transparent blit, the specified source color pixels are skipped.
Transparent(u8),
TransparentSingle(u8, u8), // transparent color, single visible color
/// Same as [BlitMethod::Transparent] except that the visible pixels on the destination are all
/// drawn using the same color.
TransparentSingle(u8, u8),
/// Same as [BlitMethod::Solid] except that the drawn pixels have their color indices offset
/// by the amount given.
SolidOffset(u8),
/// Same as [BlitMethod::Transparent] except that the drawn pixels have their color indices
/// offset by the amount given.
TransparentOffset(u8, u8),
RotoZoom { angle: f32, scale_x: f32, scale_y: f32 },
RotoZoomTransparent { angle: f32, scale_x: f32, scale_y: f32, transparent_color: u8 },
RotoZoomOffset { angle: f32, scale_x: f32, scale_y: f32, offset: u8 },
RotoZoomTransparentOffset { angle: f32, scale_x: f32, scale_y: f32, transparent_color: u8, offset: u8 },
/// Rotozoom blit, works the same as [BlitMethod::Solid] except that rotation and scaling is
/// performed.
RotoZoom {
angle: f32,
scale_x: f32,
scale_y: f32,
},
/// Same as [BlitMethod::RotoZoom] except that the specified source color pixels are skipped.
RotoZoomTransparent {
angle: f32,
scale_x: f32,
scale_y: f32,
transparent_color: u8,
},
/// Same as [BlitMethod::RotoZoom] except that the drawn pixels have their color indices
/// offset by the amount given.
RotoZoomOffset {
angle: f32,
scale_x: f32,
scale_y: f32,
offset: u8,
},
/// Same as [BlitMethod::RotoZoomTransparent] except that the drawn pixels have their color
/// indices offset by the amount given.
RotoZoomTransparentOffset {
angle: f32,
scale_x: f32,
scale_y: f32,
transparent_color: u8,
offset: u8,
},
}
/// Clips the region for a source bitmap to be used in a subsequent blit operation. The source