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Reuse input buffer for RGB/UNSIGNED_BYTE in rgba8_image_to_tex_image_data

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This commit is contained in:
Anthony Ramine 2018-09-10 12:55:57 +02:00
parent e1486f7d71
commit dac7740b8c
1 changed files with 8 additions and 7 deletions
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15
components/script/dom/webglrenderingcontext.rs
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@ -4017,14 +4017,15 @@ fn rgba8_image_to_tex_image_data(
match (format, data_type) { match (format, data_type) {
(TexFormat::RGBA, TexDataType::UnsignedByte) => pixels, (TexFormat::RGBA, TexDataType::UnsignedByte) => pixels,
(TexFormat::RGB, TexDataType::UnsignedByte) => { (TexFormat::RGB, TexDataType::UnsignedByte) => {
// Remove alpha channel for i in 0..pixel_count {
let mut rgb8 = Vec::<u8>::with_capacity(pixel_count * 3); let rgb = {
for rgba8 in pixels.chunks(4) { let rgb = &pixels[i * 4..i * 4 + 3];
rgb8.push(rgba8[0]); [rgb[0], rgb[1], rgb[2]]
rgb8.push(rgba8[1]); };
rgb8.push(rgba8[2]); pixels[i * 3..i * 3 + 3].copy_from_slice(&rgb);
} }
rgb8 pixels.truncate(pixel_count * 3);
pixels
}, },
(TexFormat::Alpha, TexDataType::UnsignedByte) => { (TexFormat::Alpha, TexDataType::UnsignedByte) => {
for i in 0..pixel_count { for i in 0..pixel_count {