gl.py (1863B)
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from glad.lang.common.loader import BaseLoader
from glad.lang.volt.loader import LOAD_OPENGL_DLL
from glad.lang.d.loader.gl import _OPENGL_HAS_EXT as _D_OPENGL_HAS_EXT
_OPENGL_LOADER = \
LOAD_OPENGL_DLL % {'pre':'private', 'init':'open_gl',
'proc':'get_proc', 'terminate':'close_gl'} + '''
bool gladLoadGL() {
StructToDg structToDg;
structToDg.func = cast(void*)get_proc;
auto dg = *cast(Loader*)&structToDg;
bool status = false;
if(open_gl()) {
status = gladLoadGL(dg);
close_gl();
}
return status;
}
'''
_OPENGL_HAS_EXT = (
'global int GL_MAJOR = 0;\nglobal int GL_MINOR = 0;' +
'\n'.join(l for l in _D_OPENGL_HAS_EXT.replace('@nogc', '').splitlines() if 'struct' not in l)
.replace('GLVersion.major', 'GL_MAJOR') +
'\n\n'
)
class OpenGLVoltLoader(BaseLoader):
def write_header_end(self, fobj):
pass
def write_header(self, fobj):
pass
def write(self, fobj):
fobj.write('import watt.library;\n')
if not self.disabled and 'gl' in self.apis:
fobj.write(_OPENGL_LOADER)
def write_begin_load(self, fobj):
fobj.write('\tglGetString = cast(typeof(glGetString))load("glGetString");\n')
fobj.write('\tif(glGetString is null) { return false; }\n')
fobj.write('\tif(glGetString(GL_VERSION) is null) { return false; }\n\n')
def write_end_load(self, fobj):
fobj.write('\treturn GL_MAJOR != 0 || GL_MINOR != 0;\n')
def write_find_core(self, fobj):
fobj.write('\tconst(char)* v = cast(const(char)*)glGetString(GL_VERSION);\n')
fobj.write('\tint major = v[0] - \'0\';\n')
fobj.write('\tint minor = v[2] - \'0\';\n')
fobj.write('\tGL_MAJOR = major; GL_MINOR = minor;\n')
def write_has_ext(self, fobj):
fobj.write(_OPENGL_HAS_EXT) |