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mini refactor

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This commit is contained in:
Gered 2022-06-04 16:26:51 -04:00
parent 819603ca2a
commit 12ad705fce
1 changed files with 17 additions and 12 deletions
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29
libretrogd/src/graphics/bitmap/blit.rs
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@ -274,6 +274,8 @@ impl Bitmap {
if new_width as i32 <= 0 || new_height as i32 <= 0 {
return;
}
let half_new_width = new_width * 0.5;
let half_new_height = new_height * 0.5;
let angle_cos = angle.cos();
let angle_sin = angle.sin();
@ -284,8 +286,8 @@ impl Bitmap {
let mut src_x = 0.0;
let mut src_y = 0.0;
let dest_center_x = dest_x as f32 + (new_width / 2.0);
let dest_center_y = dest_y as f32 + (new_height / 2.0);
let dest_center_x = dest_x as f32 + half_new_width;
let dest_center_y = dest_y as f32 + half_new_height;
for point_y in 0..new_height as i32 {
let src_pixels = src.pixels_at_unchecked(src_region.x, src_region.y + src_y as i32);
@ -293,11 +295,11 @@ impl Bitmap {
for point_x in 0..new_width as i32 {
let pixel = src_pixels[src_x as usize];
if transparent_color.is_none() || transparent_color != Some(pixel) {
let draw_x = ((angle_cos * (point_x as f32 - (new_width / 2.0)))
- (angle_sin * (point_y as f32 - (new_height / 2.0)))
let draw_x = ((angle_cos * (point_x as f32 - half_new_width))
- (angle_sin * (point_y as f32 - half_new_height))
+ dest_center_x) as i32;
let draw_y = ((angle_cos * (point_y as f32 - (new_height / 2.0)))
+ (angle_sin * (point_x as f32 - (new_width / 2.0)))
let draw_y = ((angle_cos * (point_y as f32 - half_new_height))
+ (angle_sin * (point_x as f32 - half_new_width))
+ dest_center_y) as i32;
// write the same pixel twice to mask some floating point issues (?) which would
@ -337,6 +339,9 @@ impl Bitmap {
return;
}
let half_new_width = new_width * 0.5;
let half_new_height = new_height * 0.5;
let angle_cos = angle.cos();
let angle_sin = angle.sin();
@ -346,8 +351,8 @@ impl Bitmap {
let mut src_x = 0.0;
let mut src_y = 0.0;
let dest_center_x = dest_x as f32 + (new_width / 2.0);
let dest_center_y = dest_y as f32 + (new_height / 2.0);
let dest_center_x = dest_x as f32 + half_new_width;
let dest_center_y = dest_y as f32 + half_new_height;
for point_y in 0..new_height as i32 {
let src_pixels = src.pixels_at_unchecked(src_region.x, src_region.y + src_y as i32);
@ -355,11 +360,11 @@ impl Bitmap {
for point_x in 0..new_width as i32 {
let pixel = src_pixels[src_x as usize];
if transparent_color.is_none() || transparent_color != Some(pixel) {
let draw_x = ((angle_cos * (point_x as f32 - (new_width / 2.0)))
- (angle_sin * (point_y as f32 - (new_height / 2.0)))
let draw_x = ((angle_cos * (point_x as f32 - half_new_width))
- (angle_sin * (point_y as f32 - half_new_height))
+ dest_center_x) as i32;
let draw_y = ((angle_cos * (point_y as f32 - (new_height / 2.0)))
+ (angle_sin * (point_x as f32 - (new_width / 2.0)))
let draw_y = ((angle_cos * (point_y as f32 - half_new_height))
+ (angle_sin * (point_x as f32 - half_new_width))
+ dest_center_y) as i32;
let pixel = pixel.wrapping_add(offset);