"""Functions used to generate source files during build time"""
import os.path
from typing import Optional
from methods import print_error, to_raw_cstring
class GLES3HeaderStruct:
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 = []
self.specialization_values = []
def include_file_in_gles3_header(filename: str, header_data: GLES3HeaderStruct, depth: int):
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
return header_data
def build_gles3_header(
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")
fd.write(to_raw_cstring(header_data.vertex_lines))
fd.write("\n\t\t};\n\n")
fd.write("\t\tstatic const char _fragment_code[]={\n")
fd.write(to_raw_cstring(header_data.fragment_lines))
fd.write("\n\t\t};\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")
fd.write("#endif\n")
def build_gles3_headers(target, source, env):
for x in source:
build_gles3_header(str(x), include="drivers/gles3/shader_gles3.h", class_suffix="GLES3")
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