bgfx/3rdparty/glsl-optimizer/Changelog.md

GLSL optimizer Change Log

2014 03

Fixes:

• Fixed missing precision qualifier in some ES shaders (mostly due to expansion of ternary ?: check).

2014 02

Fixes:

• Fixed vectorize pass introduced last month going wrong with dot products.

2014 01

Goodies:

• Better optimization: vectorize assignments to individual vector channels.
• More OpenGL ES 2.0 conformant printing of complex for-loops (loop inductions printed as += or ++; loop initializers inside loop body).

Fixes:

• Fixed array assignments sometimes appearing in pre-GLSL1.20 versions, especially with complex loops that couldn't be unrolled.
• Fixed output of textureOffset and texelFetch.
• Fixed error messages on MRT outputs on GL & GLES3 (now supports 4 MRTs).

2013 12

Goodies:

• Optimized performance; was spending half of the time in stupid string code.
• Added glslopt_shader_get_stats to get very approximate shader complexity stats.
• Nicer printing of complicated for-loops.

Fixes:

• Fixed printing of struct initializers.

2013 11

Goodies:

• Better optimizations: CSE; A+(-B) => A-B; !A || !B => !(A && B).
• Merged with upstream Mesa.

Fixes:

• Fixed location qualifiers, ES3.0 version printing, samplerCubeShadow sampling operations.

2013 10

Goodies:

• Initial OpenGL ES 3.0 support
• API to query shader input names; glslopt_shader_get_input_count and glslopt_shader_get_input_name

Changes:

• Xcode project files updated to Xcode 5

Fixes:

• VS2013 fixes