def __init__(self):

self.vertex_lines = []

self.fragment_lines = []

self.uniforms = []

self.fbos = []

self.texunits = []

self.texunit_names = []

self.ubos = []

self.ubo_names = []

self.feedbacks = []

self.vertex_included_files = []

self.fragment_included_files = []

self.reading = ""

self.line_offset = 0

self.vertex_offset = 0

self.fragment_offset = 0

self.variant_defines = []

self.variant_names = []

self.specialization_names = []

with open(filename, "r", encoding="utf-8") as fs:

line = fs.readline()

while line:

if line.find("=") != -1 and header_data.reading == "":

# Mode

eqpos = line.find("=")

defname = line[:eqpos].strip().upper()

define = line[eqpos + 1 :].strip()

header_data.variant_names.append(defname)

header_data.variant_defines.append(define)

line = fs.readline()

header_data.line_offset += 1

header_data.vertex_offset = header_data.line_offset

continue

if line.find("=") != -1 and header_data.reading == "specializations":

# Specialization

eqpos = line.find("=")

specname = line[:eqpos].strip()

specvalue = line[eqpos + 1 :]

header_data.specialization_names.append(specname)

header_data.specialization_values.append(specvalue)

line = fs.readline()

header_data.line_offset += 1

header_data.vertex_offset = header_data.line_offset

continue

if line.find("#[modes]") != -1:

# Nothing really, just skip

line = fs.readline()

header_data.line_offset += 1

header_data.vertex_offset = header_data.line_offset

continue

if line.find("#[specializations]") != -1:

header_data.reading = "specializations"

line = fs.readline()

header_data.line_offset += 1

header_data.vertex_offset = header_data.line_offset

continue

if line.find("#[vertex]") != -1:

header_data.reading = "vertex"

line = fs.readline()

header_data.line_offset += 1

header_data.vertex_offset = header_data.line_offset

continue

if line.find("#[fragment]") != -1:

header_data.reading = "fragment"

line = fs.readline()

header_data.line_offset += 1

header_data.fragment_offset = header_data.line_offset

continue

while line.find("#include ") != -1:

includeline = line.replace("#include ", "").strip()[1:-1]

included_file = os.path.relpath(os.path.dirname(filename) + "/" + includeline)

if included_file not in header_data.vertex_included_files and header_data.reading == "vertex":

header_data.vertex_included_files += [included_file]

if include_file_in_gles3_header(included_file, header_data, depth + 1) is None:

print_error(f'In file "{filename}": #include "{includeline}" could not be found!"')

elif included_file not in header_data.fragment_included_files and header_data.reading == "fragment":

header_data.fragment_included_files += [included_file]

if include_file_in_gles3_header(included_file, header_data, depth + 1) is None:

print_error(f'In file "{filename}": #include "{includeline}" could not be found!"')

line = fs.readline()

if line.find("uniform") != -1 and line.lower().find("texunit:") != -1:

# texture unit

texunitstr = line[line.find(":") + 1 :].strip()

if texunitstr == "auto":

texunit = "-1"

else:

texunit = str(int(texunitstr))

uline = line[: line.lower().find("//")]

uline = uline.replace("uniform", "")

uline = uline.replace("highp", "")

uline = uline.replace(";", "")

lines = uline.split(",")

for x in lines:

x = x.strip()

x = x[x.rfind(" ") + 1 :]

if x.find("[") != -1:

# unfiorm array

x = x[: x.find("[")]

if x not in header_data.texunit_names:

header_data.texunits += [(x, texunit)]

header_data.texunit_names += [x]

elif line.find("uniform") != -1 and line.lower().find("ubo:") != -1:

# uniform buffer object

ubostr = line[line.find(":") + 1 :].strip()

ubo = str(int(ubostr))

uline = line[: line.lower().find("//")]

uline = uline[uline.find("uniform") + len("uniform") :]

uline = uline.replace("highp", "")

uline = uline.replace(";", "")

uline = uline.replace("{", "").strip()

lines = uline.split(",")

for x in lines:

x = x.strip()

x = x[x.rfind(" ") + 1 :]

if x.find("[") != -1:

# unfiorm array

x = x[: x.find("[")]

if x not in header_data.ubo_names:

header_data.ubos += [(x, ubo)]

header_data.ubo_names += [x]

elif line.find("uniform") != -1 and line.find("{") == -1 and line.find(";") != -1:

uline = line.replace("uniform", "")

uline = uline.replace(";", "")

lines = uline.split(",")

for x in lines:

x = x.strip()

x = x[x.rfind(" ") + 1 :]

if x.find("[") != -1:

# unfiorm array

x = x[: x.find("[")]

if x not in header_data.uniforms:

header_data.uniforms += [x]

if (line.strip().find("out ") == 0 or line.strip().find("flat ") == 0) and line.find("tfb:") != -1:

uline = line.replace("flat ", "")

uline = uline.replace("out ", "")

uline = uline.replace("highp ", "")

uline = uline.replace(";", "")

uline = uline[uline.find(" ") :].strip()

if uline.find("//") != -1:

name, bind = uline.split("//")

if bind.find("tfb:") != -1:

name = name.strip()

bind = bind.replace("tfb:", "").strip()

header_data.feedbacks += [(name, bind)]

line = line.replace("\r", "")

line = line.replace("\n", "")

if header_data.reading == "vertex":

header_data.vertex_lines += [line]

if header_data.reading == "fragment":

header_data.fragment_lines += [line]

line = fs.readline()

header_data.line_offset += 1

filename: str,

include: str,

class_suffix: str,

optional_output_filename: Optional[str] = None,

header_data: Optional[GLES3HeaderStruct] = None,

):

header_data = header_data or GLES3HeaderStruct()

include_file_in_gles3_header(filename, header_data, 0)

if optional_output_filename is None:

out_file = filename + ".gen.h"

else:

out_file = optional_output_filename

with open(out_file, "w", encoding="utf-8", newline="\n") as fd:

defspec = 0

defvariant = ""

fd.write("/* WARNING, THIS FILE WAS GENERATED, DO NOT EDIT */\n")

out_file_base = out_file

out_file_base = out_file_base[out_file_base.rfind("/") + 1 :]

out_file_base = out_file_base[out_file_base.rfind("\\") + 1 :]

out_file_ifdef = out_file_base.replace(".", "_").upper()

fd.write("#ifndef " + out_file_ifdef + class_suffix + "_GLES3\n")

fd.write("#define " + out_file_ifdef + class_suffix + "_GLES3\n")

out_file_class = (

out_file_base.replace(".glsl.gen.h", "").title().replace("_", "").replace(".", "") + "Shader" + class_suffix

)

fd.write("\n\n")

fd.write('#include "' + include + '"\n\n\n')

fd.write("class " + out_file_class + " : public Shader" + class_suffix + " {\n\n")

fd.write("public:\n\n")

if header_data.uniforms:

fd.write("\tenum Uniforms {\n")

for x in header_data.uniforms:

fd.write("\t\t" + x.upper() + ",\n")

fd.write("\t};\n\n")

if header_data.variant_names:

fd.write("\tenum ShaderVariant {\n")

for x in header_data.variant_names:

fd.write("\t\t" + x + ",\n")

fd.write("\t};\n\n")

else:

fd.write("\tenum ShaderVariant { DEFAULT };\n\n")

defvariant = "=DEFAULT"

if header_data.specialization_names:

fd.write("\tenum Specializations {\n")

counter = 0

for x in header_data.specialization_names:

fd.write("\t\t" + x.upper() + "=" + str(1 << counter) + ",\n")

counter += 1

fd.write("\t};\n\n")

for i in range(len(header_data.specialization_names)):

defval = header_data.specialization_values[i].strip()

if defval.upper() == "TRUE" or defval == "1":

defspec |= 1 << i

fd.write(

"\t_FORCE_INLINE_ bool version_bind_shader(RID p_version,ShaderVariant p_variant"

+ defvariant

+ ",uint64_t p_specialization="

+ str(defspec)

+ ") { return _version_bind_shader(p_version,p_variant,p_specialization); }\n\n"

)

if header_data.uniforms:

fd.write(

"\t_FORCE_INLINE_ int version_get_uniform(Uniforms p_uniform,RID p_version,ShaderVariant p_variant"

+ defvariant

+ ",uint64_t p_specialization="

+ str(defspec)

+ ") { return _version_get_uniform(p_uniform,p_version,p_variant,p_specialization); }\n\n"

)

fd.write(

"\t#define _FU if (version_get_uniform(p_uniform,p_version,p_variant,p_specialization)<0) return; \n\n "

)

fd.write(

"\t_FORCE_INLINE_ void version_set_uniform(Uniforms p_uniform, float p_value,RID p_version,ShaderVariant p_variant"

+ defvariant

+ ",uint64_t p_specialization="

+ str(defspec)

+ ") { _FU glUniform1f(version_get_uniform(p_uniform,p_version,p_variant,p_specialization),p_value); }\n\n"

)

fd.write(

"\t_FORCE_INLINE_ void version_set_uniform(Uniforms p_uniform, double p_value,RID p_version,ShaderVariant p_variant"

+ defvariant

+ ",uint64_t p_specialization="

+ str(defspec)

+ ") { _FU glUniform1f(version_get_uniform(p_uniform,p_version,p_variant,p_specialization),p_value); }\n\n"

)

fd.write(

"\t_FORCE_INLINE_ void version_set_uniform(Uniforms p_uniform, uint8_t p_value,RID p_version,ShaderVariant p_variant"

+ defvariant

+ ",uint64_t p_specialization="

+ str(defspec)

+ ") { _FU glUniform1ui(version_get_uniform(p_uniform,p_version,p_variant,p_specialization),p_value); }\n\n"

)

fd.write(

"\t_FORCE_INLINE_ void version_set_uniform(Uniforms p_uniform, int8_t p_value,RID p_version,ShaderVariant p_variant"

+ defvariant

+ ",uint64_t p_specialization="

+ str(defspec)

+ ") { _FU glUniform1i(version_get_uniform(p_uniform,p_version,p_variant,p_specialization),p_value); }\n\n"

)

fd.write(

"\t_FORCE_INLINE_ void version_set_uniform(Uniforms p_uniform, uint16_t p_value,RID p_version,ShaderVariant p_variant"

+ defvariant

+ ",uint64_t p_specialization="

+ str(defspec)

+ ") { _FU glUniform1ui(version_get_uniform(p_uniform,p_version,p_variant,p_specialization),p_value); }\n\n"

)

fd.write(

"\t_FORCE_INLINE_ void version_set_uniform(Uniforms p_uniform, int16_t p_value,RID p_version,ShaderVariant p_variant"

+ defvariant

+ ",uint64_t p_specialization="

+ str(defspec)

+ ") { _FU glUniform1i(version_get_uniform(p_uniform,p_version,p_variant,p_specialization),p_value); }\n\n"

)

fd.write(

"\t_FORCE_INLINE_ void version_set_uniform(Uniforms p_uniform, uint32_t p_value,RID p_version,ShaderVariant p_variant"

+ defvariant

+ ",uint64_t p_specialization="

+ str(defspec)

+ ") { _FU glUniform1ui(version_get_uniform(p_uniform,p_version,p_variant,p_specialization),p_value); }\n\n"

)

fd.write(

"\t_FORCE_INLINE_ void version_set_uniform(Uniforms p_uniform, int32_t p_value,RID p_version,ShaderVariant p_variant"

+ defvariant

+ ",uint64_t p_specialization="

+ str(defspec)

+ ") { _FU glUniform1i(version_get_uniform(p_uniform,p_version,p_variant,p_specialization),p_value); }\n\n"

)

fd.write(

"\t_FORCE_INLINE_ void version_set_uniform(Uniforms p_uniform, const Color& p_color,RID p_version,ShaderVariant p_variant"

+ defvariant

+ ",uint64_t p_specialization="

+ str(defspec)

+ ") { _FU GLfloat col[4]={p_color.r,p_color.g,p_color.b,p_color.a}; glUniform4fv(version_get_uniform(p_uniform,p_version,p_variant,p_specialization),1,col); }\n\n"

)

fd.write(

"\t_FORCE_INLINE_ void version_set_uniform(Uniforms p_uniform, const Vector2& p_vec2,RID p_version,ShaderVariant p_variant"

+ defvariant

+ ",uint64_t p_specialization="

+ str(defspec)

+ ") { _FU GLfloat vec2[2]={float(p_vec2.x),float(p_vec2.y)}; glUniform2fv(version_get_uniform(p_uniform,p_version,p_variant,p_specialization),1,vec2); }\n\n"

)

fd.write(

"\t_FORCE_INLINE_ void version_set_uniform(Uniforms p_uniform, const Size2i& p_vec2,RID p_version,ShaderVariant p_variant"

+ defvariant

+ ",uint64_t p_specialization="

+ str(defspec)

+ ") { _FU GLint vec2[2]={GLint(p_vec2.x),GLint(p_vec2.y)}; glUniform2iv(version_get_uniform(p_uniform,p_version,p_variant,p_specialization),1,vec2); }\n\n"

)

fd.write(

"\t_FORCE_INLINE_ void version_set_uniform(Uniforms p_uniform, const Vector3& p_vec3,RID p_version,ShaderVariant p_variant"

+ defvariant

+ ",uint64_t p_specialization="

+ str(defspec)

+ ") { _FU GLfloat vec3[3]={float(p_vec3.x),float(p_vec3.y),float(p_vec3.z)}; glUniform3fv(version_get_uniform(p_uniform,p_version,p_variant,p_specialization),1,vec3); }\n\n"

)

fd.write(

"\t_FORCE_INLINE_ void version_set_uniform(Uniforms p_uniform, const Vector4& p_vec4,RID p_version,ShaderVariant p_variant"

+ defvariant

+ ",uint64_t p_specialization="

+ str(defspec)

+ ") { _FU GLfloat vec4[4]={float(p_vec4.x),float(p_vec4.y),float(p_vec4.z),float(p_vec4.w)}; glUniform4fv(version_get_uniform(p_uniform,p_version,p_variant,p_specialization),1,vec4); }\n\n"

)

fd.write(

"\t_FORCE_INLINE_ void version_set_uniform(Uniforms p_uniform, float p_a, float p_b,RID p_version,ShaderVariant p_variant"

+ defvariant

+ ",uint64_t p_specialization="

+ str(defspec)

+ ") { _FU glUniform2f(version_get_uniform(p_uniform,p_version,p_variant,p_specialization),p_a,p_b); }\n\n"

)

fd.write(

"\t_FORCE_INLINE_ void version_set_uniform(Uniforms p_uniform, float p_a, float p_b, float p_c,RID p_version,ShaderVariant p_variant"

+ defvariant

+ ",uint64_t p_specialization="

+ str(defspec)

+ ") { _FU glUniform3f(version_get_uniform(p_uniform,p_version,p_variant,p_specialization),p_a,p_b,p_c); }\n\n"

)

fd.write(

"\t_FORCE_INLINE_ void version_set_uniform(Uniforms p_uniform, float p_a, float p_b, float p_c, float p_d,RID p_version,ShaderVariant p_variant"

+ defvariant

+ ",uint64_t p_specialization="

+ str(defspec)

+ ") { _FU glUniform4f(version_get_uniform(p_uniform,p_version,p_variant,p_specialization),p_a,p_b,p_c,p_d); }\n\n"

)

fd.write(

"""\t_FORCE_INLINE_ void version_set_uniform(Uniforms p_uniform, const Transform3D& p_transform,RID p_version,ShaderVariant p_variant"""

+ defvariant

+ """,uint64_t p_specialization="""

+ str(defspec)

+ """) { _FU

const Transform3D &tr = p_transform;

GLfloat matrix[16]={ /* build a 16x16 matrix */

(GLfloat)tr.basis.rows[0][0],

(GLfloat)tr.basis.rows[1][0],

(GLfloat)tr.basis.rows[2][0],

(GLfloat)0,

(GLfloat)tr.basis.rows[0][1],

(GLfloat)tr.basis.rows[1][1],

(GLfloat)tr.basis.rows[2][1],

(GLfloat)0,

(GLfloat)tr.basis.rows[0][2],

(GLfloat)tr.basis.rows[1][2],

(GLfloat)tr.basis.rows[2][2],

(GLfloat)0,

(GLfloat)tr.origin.x,

(GLfloat)tr.origin.y,

(GLfloat)tr.origin.z,

(GLfloat)1

};

glUniformMatrix4fv(version_get_uniform(p_uniform,p_version,p_variant,p_specialization),1,false,matrix);

}

"""

)

fd.write(

"""_FORCE_INLINE_ void version_set_uniform(Uniforms p_uniform, const Transform2D& p_transform,RID p_version,ShaderVariant p_variant"""

+ defvariant

+ """,uint64_t p_specialization="""

+ str(defspec)

+ """) { _FU

const Transform2D &tr = p_transform;

GLfloat matrix[16]={ /* build a 16x16 matrix */

(GLfloat)tr.columns[0][0],

(GLfloat)tr.columns[0][1],

(GLfloat)0,

(GLfloat)0,

(GLfloat)tr.columns[1][0],

(GLfloat)tr.columns[1][1],

(GLfloat)0,

(GLfloat)0,

(GLfloat)0,

(GLfloat)0,

(GLfloat)1,

(GLfloat)0,

(GLfloat)tr.columns[2][0],

(GLfloat)tr.columns[2][1],

(GLfloat)0,

(GLfloat)1

};

glUniformMatrix4fv(version_get_uniform(p_uniform,p_version,p_variant,p_specialization),1,false,matrix);

}

"""

)

fd.write(

"""_FORCE_INLINE_ void version_set_uniform(Uniforms p_uniform, const Projection& p_matrix, RID p_version, ShaderVariant p_variant"""

+ defvariant

+ """,uint64_t p_specialization="""

+ str(defspec)

+ """) { _FU

GLfloat matrix[16];

for (int i = 0; i < 4; i++) {

for (int j = 0; j < 4; j++) {

matrix[i * 4 + j] = p_matrix.columns[i][j];

}

}

glUniformMatrix4fv(version_get_uniform(p_uniform, p_version, p_variant, p_specialization), 1, false, matrix);

}"""

)

fd.write("\n\n#undef _FU\n\n\n")

fd.write("protected:\n\n")

fd.write("\tvirtual void _init() override {\n\n")

if header_data.uniforms:

fd.write("\t\tstatic const char* _uniform_strings[]={\n")

if header_data.uniforms:

for x in header_data.uniforms:

fd.write('\t\t\t"' + x + '",\n')

fd.write("\t\t};\n\n")

else:

fd.write("\t\tstatic const char **_uniform_strings=nullptr;\n")

variant_count = 1

if len(header_data.variant_defines) > 0:

fd.write("\t\tstatic const char* _variant_defines[]={\n")

for x in header_data.variant_defines:

fd.write('\t\t\t"' + x + '",\n')

fd.write("\t\t};\n\n")

variant_count = len(header_data.variant_defines)

else:

fd.write("\t\tstatic const char **_variant_defines[]={" "};\n")

if header_data.texunits:

fd.write("\t\tstatic TexUnitPair _texunit_pairs[]={\n")

for x in header_data.texunits:

fd.write('\t\t\t{"' + x[0] + '",' + x[1] + "},\n")

fd.write("\t\t};\n\n")

else:

fd.write("\t\tstatic TexUnitPair *_texunit_pairs=nullptr;\n")

if header_data.ubos:

fd.write("\t\tstatic UBOPair _ubo_pairs[]={\n")

for x in header_data.ubos:

fd.write('\t\t\t{"' + x[0] + '",' + x[1] + "},\n")

fd.write("\t\t};\n\n")

else:

fd.write("\t\tstatic UBOPair *_ubo_pairs=nullptr;\n")

specializations_found = []

if header_data.specialization_names:

fd.write("\t\tstatic Specialization _spec_pairs[]={\n")

for i in range(len(header_data.specialization_names)):

defval = header_data.specialization_values[i].strip()

if defval.upper() == "TRUE" or defval == "1":

defval = "true"

else:

defval = "false"

fd.write('\t\t\t{"' + header_data.specialization_names[i] + '",' + defval + "},\n")

specializations_found.append(header_data.specialization_names[i])

fd.write("\t\t};\n\n")

else:

fd.write("\t\tstatic Specialization *_spec_pairs=nullptr;\n")

feedback_count = 0

if header_data.feedbacks:

fd.write("\t\tstatic const Feedback _feedbacks[]={\n")

for x in header_data.feedbacks:

name = x[0]

spec = x[1]

if spec in specializations_found:

fd.write('\t\t\t{"' + name + '",' + str(1 << specializations_found.index(spec)) + "},\n")

else:

fd.write('\t\t\t{"' + name + '",0},\n')

feedback_count += 1

fd.write("\t\t};\n\n")

else:

fd.write("\t\tstatic const Feedback* _feedbacks=nullptr;\n")

fd.write("\t\tstatic const char _vertex_code[]={\n")

for x in header_data.vertex_lines:

for c in x:

fd.write(str(ord(c)) + ",")

fd.write(str(ord("\n")) + ",")

fd.write("\t\t0};\n\n")

fd.write("\t\tstatic const char _fragment_code[]={\n")

for x in header_data.fragment_lines:

for c in x:

fd.write(str(ord(c)) + ",")

fd.write(str(ord("\n")) + ",")

fd.write("\t\t0};\n\n")

fd.write(

'\t\t_setup(_vertex_code,_fragment_code,"'

+ out_file_class

+ '",'

+ str(len(header_data.uniforms))

+ ",_uniform_strings,"

+ str(len(header_data.ubos))

+ ",_ubo_pairs,"

+ str(feedback_count)

+ ",_feedbacks,"

+ str(len(header_data.texunits))

+ ",_texunit_pairs,"

+ str(len(header_data.specialization_names))

+ ",_spec_pairs,"

+ str(variant_count)

+ ",_variant_defines);\n"

)

fd.write("\t}\n\n")

fd.write("};\n\n")