[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Public WebGL] Shader validator issue.

I think I may have found a validator bug.

This shader is boiled down to the bare essentials from a much bigger

#ifdef GL_ES
precision highp float;

uniform sampler2D diffuseMap ;

void main()
  gl_FragColor = texture2DLod ( diffuseMap, vec2(0.5,0.5), 0.0 ) ;

It compiles and runs just fine under last nights' Firefox/Minefield in
both Linux & Windows with the validator disabled - but fails with this
error with the validator turned on:

  Error compiling shader:
  ERROR: 0:10: 'texture2DLod' : no matching overloaded function found
  ERROR: 0:10: 'assign' : cannot convert from 'const mediump float'
               to 'FragColor mediump 4-component vector of float'
  ERROR: 2 compilation errors. No code generated.
  GL Error: 1281 in loadShaderPairFromString

(It also fails in more sane cases, like when the second parameter is a
simple varying texCoord and when the third parameter is a float variable).

Is there a problem with texture2DLod?  I think I'm using it correctly per
page 77 of

It says:

  vec4 texture2DLod (sampler2D sampler, vec2 coord, float lod)


  -- Steve

You are currently subscribed to public_webgl@khronos.org.
To unsubscribe, send an email to majordomo@khronos.org with
the following command in the body of your email: