1 Problem:  webGL sites are displayed in the wrong color (usually blue-ish)

     2 Solution: Problem is with skia once again. Output of webgl seems endian-correct, but skia only

     3           knows how to deal with little endian.

     4           So we swizzle the output of webgl after reading it from readpixels()

     5 Note:     This does not fix all webGL sites, but is a step in the right direction

     6 diff -r 6b017d3e9733 gfx/gl/GLContext.h

     7 --- a/gfx/gl/GLContext.h    Mon Sep 09 10:04:05 2019 +0200

     8 +++ b/gfx/gl/GLContext.h    Wed Nov 13 17:13:04 2019 +0100

     9 @@ -1551,6 +1551,13 @@

    10      BEFORE_GL_CALL;

    11      mSymbols.fReadPixels(x, y, width, height, format, type, pixels);

    12      OnSyncCall();

    13 +#if MOZ_BIG_ENDIAN

    14 +    uint8_t* itr = (uint8_t*)pixels;

    15 +    for (GLsizei i = 0; i < width * height; i++) {

    16 +      NativeEndian::swapToLittleEndianInPlace((uint32_t*)itr, 1);

    17 +      itr += 4;

    18 +    }

    19 +#endif

    20      AFTER_GL_CALL;

    21      mHeavyGLCallsSinceLastFlush = true;

    22    }

    23