From 29ab55d076eedff3847b13885f8ea8b2374af45c Mon Sep 17 00:00:00 2001
From: Josh Matthews <josh@joshmatthews.net>
Date: Thu, 9 Apr 2020 17:18:35 -0400
Subject: webgl: Fix support for float/half-float texture formats.

---
 components/canvas/webgl_thread.rs | 33 ++++++++++++++++++++++-----------
 1 file changed, 22 insertions(+), 11 deletions(-)

(limited to 'components/canvas/webgl_thread.rs')

diff --git a/components/canvas/webgl_thread.rs b/components/canvas/webgl_thread.rs
index 4613110019a..5e4bdbc4056 100644
--- a/components/canvas/webgl_thread.rs
+++ b/components/canvas/webgl_thread.rs
@@ -2773,7 +2773,8 @@ fn image_to_tex_image_data(
     }
 
     match (format, data_type) {
-        (TexFormat::RGBA, TexDataType::UnsignedByte) => pixels,
+        (TexFormat::RGBA, TexDataType::UnsignedByte) |
+        (TexFormat::RGBA8, TexDataType::UnsignedByte) => pixels,
         (TexFormat::RGB, TexDataType::UnsignedByte) => {
             for i in 0..pixel_count {
                 let rgb = {
@@ -2854,7 +2855,8 @@ fn image_to_tex_image_data(
             pixels.truncate(pixel_count * 2);
             pixels
         },
-        (TexFormat::RGBA, TexDataType::Float) => {
+        (TexFormat::RGBA, TexDataType::Float) |
+        (TexFormat::RGBA32f, TexDataType::Float) => {
             let mut rgbaf32 = Vec::<u8>::with_capacity(pixel_count * 16);
             for rgba8 in pixels.chunks(4) {
                 rgbaf32.write_f32::<NativeEndian>(rgba8[0] as f32).unwrap();
@@ -2865,7 +2867,8 @@ fn image_to_tex_image_data(
             rgbaf32
         },
 
-        (TexFormat::RGB, TexDataType::Float) => {
+        (TexFormat::RGB, TexDataType::Float) |
+        (TexFormat::RGB32f, TexDataType::Float) => {
             let mut rgbf32 = Vec::<u8>::with_capacity(pixel_count * 12);
             for rgba8 in pixels.chunks(4) {
                 rgbf32.write_f32::<NativeEndian>(rgba8[0] as f32).unwrap();
@@ -2875,7 +2878,8 @@ fn image_to_tex_image_data(
             rgbf32
         },
 
-        (TexFormat::Alpha, TexDataType::Float) => {
+        (TexFormat::Alpha, TexDataType::Float) |
+        (TexFormat::Alpha32f, TexDataType::Float) => {
             for rgba8 in pixels.chunks_mut(4) {
                 let p = rgba8[3] as f32;
                 NativeEndian::write_f32(rgba8, p);
@@ -2883,7 +2887,8 @@ fn image_to_tex_image_data(
             pixels
         },
 
-        (TexFormat::Luminance, TexDataType::Float) => {
+        (TexFormat::Luminance, TexDataType::Float) |
+        (TexFormat::Luminance32f, TexDataType::Float) => {
             for rgba8 in pixels.chunks_mut(4) {
                 let p = rgba8[0] as f32;
                 NativeEndian::write_f32(rgba8, p);
@@ -2891,7 +2896,8 @@ fn image_to_tex_image_data(
             pixels
         },
 
-        (TexFormat::LuminanceAlpha, TexDataType::Float) => {
+        (TexFormat::LuminanceAlpha, TexDataType::Float) |
+        (TexFormat::LuminanceAlpha32f, TexDataType::Float) => {
             let mut data = Vec::<u8>::with_capacity(pixel_count * 8);
             for rgba8 in pixels.chunks(4) {
                 data.write_f32::<NativeEndian>(rgba8[0] as f32).unwrap();
@@ -2900,7 +2906,8 @@ fn image_to_tex_image_data(
             data
         },
 
-        (TexFormat::RGBA, TexDataType::HalfFloat) => {
+        (TexFormat::RGBA, TexDataType::HalfFloat) |
+        (TexFormat::RGBA16f, TexDataType::HalfFloat) => {
             let mut rgbaf16 = Vec::<u8>::with_capacity(pixel_count * 8);
             for rgba8 in pixels.chunks(4) {
                 rgbaf16
@@ -2919,7 +2926,8 @@ fn image_to_tex_image_data(
             rgbaf16
         },
 
-        (TexFormat::RGB, TexDataType::HalfFloat) => {
+        (TexFormat::RGB, TexDataType::HalfFloat) |
+        (TexFormat::RGB16f, TexDataType::HalfFloat) => {
             let mut rgbf16 = Vec::<u8>::with_capacity(pixel_count * 6);
             for rgba8 in pixels.chunks(4) {
                 rgbf16
@@ -2934,7 +2942,8 @@ fn image_to_tex_image_data(
             }
             rgbf16
         },
-        (TexFormat::Alpha, TexDataType::HalfFloat) => {
+        (TexFormat::Alpha, TexDataType::HalfFloat) |
+        (TexFormat::Alpha16f, TexDataType::HalfFloat) => {
             for i in 0..pixel_count {
                 let p = f16::from_f32(pixels[i * 4 + 3] as f32).as_bits();
                 NativeEndian::write_u16(&mut pixels[i * 2..i * 2 + 2], p);
@@ -2942,7 +2951,8 @@ fn image_to_tex_image_data(
             pixels.truncate(pixel_count * 2);
             pixels
         },
-        (TexFormat::Luminance, TexDataType::HalfFloat) => {
+        (TexFormat::Luminance, TexDataType::HalfFloat) |
+        (TexFormat::Luminance16f, TexDataType::HalfFloat) => {
             for i in 0..pixel_count {
                 let p = f16::from_f32(pixels[i * 4] as f32).as_bits();
                 NativeEndian::write_u16(&mut pixels[i * 2..i * 2 + 2], p);
@@ -2950,7 +2960,8 @@ fn image_to_tex_image_data(
             pixels.truncate(pixel_count * 2);
             pixels
         },
-        (TexFormat::LuminanceAlpha, TexDataType::HalfFloat) => {
+        (TexFormat::LuminanceAlpha, TexDataType::HalfFloat) |
+        (TexFormat::LuminanceAlpha16f, TexDataType::HalfFloat) => {
             for rgba8 in pixels.chunks_mut(4) {
                 let lum = f16::from_f32(rgba8[0] as f32).as_bits();
                 let a = f16::from_f32(rgba8[3] as f32).as_bits();
-- 
cgit v1.2.3