func setSupportInfos() {
// Extensions
var num gl.Int
gl.GetIntegerv(gl.NUM_EXTENSIONS, &num)
Support.Extensions = make([]string, num)
if num > 0 {
for i := gl.Int(0); i < num; i++ {
Support.Extensions[i] = Util.Stri(gl.EXTENSIONS, gl.Uint(i))
}
}
// Sampling limits, textures
// Support.Textures.StreamUpdatesViaPixelBuffer = true
if Util.Extension("texture_filter_anisotropic") {
gl.GetFloatv(gl.MAX_TEXTURE_MAX_ANISOTROPY_EXT, &Support.Textures.MaxFilterAnisotropy)
}
gl.GetFloatv(gl.MAX_TEXTURE_LOD_BIAS, &Support.Textures.MaxMipLoadBias)
Support.Textures.ImageUnits.MaxCombined = Util.Val(gl.MAX_COMBINED_TEXTURE_IMAGE_UNITS)
Support.Textures.ImageUnits.MaxFragment = Util.Val(gl.MAX_TEXTURE_IMAGE_UNITS)
Support.Textures.ImageUnits.MaxGeometry = Util.Val(gl.MAX_GEOMETRY_TEXTURE_IMAGE_UNITS)
Support.Textures.ImageUnits.MaxVertex = Util.Val(gl.MAX_VERTEX_TEXTURE_IMAGE_UNITS)
// GL version-specifics
if Support.GlVersion.Is42 {
Support.Buffers.AtomicCounter, Support.Textures.Immutable = true, true
}
if Support.GlVersion.Is43 {
Support.Textures.ImageUnits.MaxCompute = Util.Val(gl.MAX_COMPUTE_TEXTURE_IMAGE_UNITS)
Support.Buffers.DispatchIndirect, Support.Buffers.ShaderStorage = true, true
}
// GLSL version-specifics
if Support.Glsl.Version.Is400 {
Support.Glsl.Shaders.TessellationStages = true
}
if Support.Glsl.Version.Is430 {
Support.Glsl.Shaders.ComputeStage = true
}
Cache.onGlInit()
}
// Returns the specified n integers as returned by gl.GetIntegerv().
func (_ GlUtil) Vals(name gl.Enum, n uint) (vals []gl.Int) {
vals = make([]gl.Int, n)
gl.GetIntegerv(name, &vals[0])
return
}
// Returns the specified integer as returned by gl.GetIntegerv().
// Example: numExts := GlVal(gl.NUM_EXTENSIONS)
func (_ GlUtil) Val(name gl.Enum) (val gl.Int) {
gl.GetIntegerv(name, &val)
return
}