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#!/usr/bin/python
from os import path
import sys
def vec_type(g, size):
if size == 1:
if g == "i":
return "int"
elif g == "u":
return "unsigned"
return "float"
return g + "vec" + str(size)
# Get the base dimension - i.e. sampler3D gives 3
def get_coord_dim(sampler_type):
if sampler_type[0].isdigit():
return int(sampler_type[0])
elif sampler_type.startswith("Cube"):
return 3
assert False ("coord_dim: invalid sampler_type: " + sampler_type)
# Get the number of extra vector components (i.e. shadow comparitor)
def get_extra_dim(sampler_type, use_proj, unused_fields):
extra_dim = unused_fields
if sampler_type.find("Shadow") != -1:
extra_dim += 1
if sampler_type.find("Array") != -1:
extra_dim += 1
if use_proj:
extra_dim += 1
return extra_dim
def generate_sigs(g, tex_inst, sampler_type, use_proj = False, unused_fields = 0):
coord_dim = get_coord_dim(sampler_type)
extra_dim = get_extra_dim(sampler_type, use_proj, unused_fields)
# Print parameters
print " (signature " + g + "vec4"
print " (parameters"
print " (declare (in) " + g + "sampler" + sampler_type + " sampler)"
print " (declare (in) " + vec_type("i" if tex_inst == "txf" else "", coord_dim + extra_dim) + " P)",
if tex_inst == "txb":
print "\n (declare (in) float bias)",
elif tex_inst == "txl":
print "\n (declare (in) float lod)",
elif tex_inst == "txf":
print "\n (declare (in) int lod)",
elif tex_inst == "txd":
grad_type = vec_type("", coord_dim)
print "\n (declare (in) " + grad_type + " dPdx)",
print "\n (declare (in) " + grad_type + " dPdy)",
print ")\n ((return (" + tex_inst + " (var_ref sampler)",
# Coordinate
if extra_dim > 0:
print "(swiz " + "xyzw"[:coord_dim] + " (var_ref P))",
else:
print "(var_ref P)",
# Offset
print "(0 0 0)",
if tex_inst != "txf":
# Projective divisor
if use_proj:
print "(swiz " + "xyzw"[coord_dim + extra_dim-1] + " (var_ref P))",
else:
print "1",
# Shadow comparitor
if sampler_type.endswith("Shadow"):
print "(swiz z (var_ref P))",
else:
print "()",
# Bias/explicit LOD/gradient:
if tex_inst == "txb":
print "(var_ref bias)",
elif tex_inst == "txl" or tex_inst == "txf":
print "(var_ref lod)",
elif tex_inst == "txd":
print "((var_ref dPdx) (var_ref dPdy))",
print "))))\n"
def generate_fiu_sigs(tex_inst, sampler_type, use_proj = False, unused_fields = 0):
generate_sigs("", tex_inst, sampler_type, use_proj, unused_fields)
generate_sigs("i", tex_inst, sampler_type, use_proj, unused_fields)
generate_sigs("u", tex_inst, sampler_type, use_proj, unused_fields)
builtins_dir = path.join(path.dirname(path.abspath(__file__)), "..")
with open(path.join(builtins_dir, "130", "texture"), 'w') as sys.stdout:
print "((function texture"
generate_fiu_sigs("tex", "1D")
generate_fiu_sigs("tex", "2D")
generate_fiu_sigs("tex", "3D")
generate_fiu_sigs("tex", "Cube")
generate_fiu_sigs("tex", "1DArray")
generate_fiu_sigs("tex", "2DArray")
print "))"
# txb variants are only allowed within a fragment shader (GLSL 1.30 p. 86)
with open(path.join(builtins_dir, "130_fs", "texture"), 'w') as sys.stdout:
print "((function texture"
generate_fiu_sigs("txb", "1D")
generate_fiu_sigs("txb", "2D")
generate_fiu_sigs("txb", "3D")
generate_fiu_sigs("txb", "Cube")
generate_fiu_sigs("txb", "1DArray")
generate_fiu_sigs("txb", "2DArray")
print "))"
with open(path.join(builtins_dir, "130", "textureLod"), 'w') as sys.stdout:
print "((function textureLod"
generate_fiu_sigs("txl", "1D")
generate_fiu_sigs("txl", "2D")
generate_fiu_sigs("txl", "3D")
generate_fiu_sigs("txl", "Cube")
generate_fiu_sigs("txl", "1DArray")
generate_fiu_sigs("txl", "2DArray")
print "))"
with open(path.join(builtins_dir, "130", "texelFetch"), 'w') as sys.stdout:
print "((function texelFetch"
generate_fiu_sigs("txf", "1D")
generate_fiu_sigs("txf", "2D")
generate_fiu_sigs("txf", "3D")
generate_fiu_sigs("txf", "1DArray")
generate_fiu_sigs("txf", "2DArray")
print "))"
with open(path.join(builtins_dir, "130", "textureGrad"), 'w') as sys.stdout:
print "((function textureGrad"
generate_fiu_sigs("txd", "1D")
generate_fiu_sigs("txd", "2D")
generate_fiu_sigs("txd", "3D")
generate_fiu_sigs("txd", "Cube")
generate_fiu_sigs("txd", "1DArray")
generate_fiu_sigs("txd", "2DArray")
print ")\n)"
# ARB_texture_rectangle extension
with open(path.join(builtins_dir, "ARB_texture_rectangle", "textures"), 'w') as sys.stdout:
print "((function texture2DRect"
generate_sigs("", "tex", "2DRect")
print ")\n (function shadow2DRect"
generate_sigs("", "tex", "2DRectShadow")
print "))"
# Deprecated (110/120 style) functions with silly names:
with open(path.join(builtins_dir, "110", "textures"), 'w') as sys.stdout:
print "((function texture1D"
generate_sigs("", "tex", "1D")
print ")\n (function texture1DLod"
generate_sigs("", "txl", "1D")
print ")\n (function texture1DProj"
generate_sigs("", "tex", "1D", True)
generate_sigs("", "tex", "1D", True, 2)
print ")\n (function texture1DProjLod"
generate_sigs("", "txl", "1D", True)
generate_sigs("", "txl", "1D", True, 2)
print ")\n (function texture2D"
generate_sigs("", "tex", "2D")
print ")\n(function texture2DLod"
generate_sigs("", "txl", "2D")
print ")\n (function texture2DProj"
generate_sigs("", "tex", "2D", True)
generate_sigs("", "tex", "2D", True, 1)
print ")\n (function texture2DProjLod"
generate_sigs("", "txl", "2D", True)
generate_sigs("", "txl", "2D", True, 1)
print ")\n (function texture3D"
generate_sigs("", "tex", "3D")
print ")\n (function texture3DLod"
generate_sigs("", "txl", "3D")
print ")\n (function texture3DProj"
generate_sigs("", "tex", "3D", True)
print ")\n (function texture3DProjLod"
generate_sigs("", "txl", "3D", True)
print ")\n (function textureCube"
generate_sigs("", "tex", "Cube")
print ")\n (function textureCubeLod"
generate_sigs("", "txl", "Cube")
print ")\n (function shadow1D"
generate_sigs("", "tex", "1DShadow", False, 1)
print ")\n (function shadow1DLod"
generate_sigs("", "txl", "1DShadow", False, 1)
print ")\n (function shadow1DProj"
generate_sigs("", "tex", "1DShadow", True, 1)
print ")\n (function shadow1DProjLod"
generate_sigs("", "txl", "1DShadow", True, 1)
print ")\n (function shadow2D"
generate_sigs("", "tex", "2DShadow")
print ")\n (function shadow2DLod"
generate_sigs("", "txl", "2DShadow")
print ")\n (function shadow2DProj"
generate_sigs("", "tex", "2DShadow", True)
print ")\n (function shadow2DProjLod"
generate_sigs("", "txl", "2DShadow", True)
print "))"
with open(path.join(builtins_dir, "110_fs", "textures"), 'w') as sys.stdout:
print "((function texture1D"
generate_sigs("", "txb", "1D")
print ")\n (function texture1DProj"
generate_sigs("", "txb", "1D", True)
generate_sigs("", "txb", "1D", True, 2)
print ")\n (function texture2D"
generate_sigs("", "txb", "2D")
print ")\n (function texture2DProj"
generate_sigs("", "txb", "2D", True)
generate_sigs("", "txb", "2D", True, 1)
print ")\n (function texture3D"
generate_sigs("", "txb", "3D")
print ")\n (function texture3DProj"
generate_sigs("", "txb", "3D", True)
print ")\n (function textureCube"
generate_sigs("", "txb", "Cube")
print ")\n (function shadow1D"
generate_sigs("", "txb", "1DShadow", False, 1)
print ")\n (function shadow1DProj"
generate_sigs("", "txb", "1DShadow", True, 1)
print ")\n (function shadow2D"
generate_sigs("", "txb", "2DShadow")
print ")\n (function shadow2DProj"
generate_sigs("", "txb", "2DShadow", True)
print "))"
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