added glad generator and a glad runtime

tools/glad-0.1.14a0/glad/lang/volt/loader/__init__.py

@@ -0,0 +1,64 @@
+
+LOAD_OPENGL_DLL = '''
+private global Library libGL;
+extern(System) private alias gladGetProcAddressPtrType = void* function(const(char)*);
+private global gladGetProcAddressPtrType gladGetProcAddressPtr;
+
+%(pre)s
+bool %(init)s() {
+    version(Windows) {
+        libGL = Library.load("opengl32.dll");
+    } else version(OSX) {
+        libGL = Library.loads([
+            "../Frameworks/OpenGL.framework/OpenGL",
+            "/Library/Frameworks/OpenGL.framework/OpenGL",
+            "/System/Library/Frameworks/OpenGL.framework/OpenGL",
+            "/System/Library/Frameworks/OpenGL.framework/Versions/Current/OpenGL"
+        ]);
+    } else {
+        libGL = Library.loads(["libGL.so.1", "libGL.so"]);
+    }
+
+    if(libGL !is null) {
+        version(Windows) {
+            string sym = "wglGetProcAddress";
+        } else {
+            string sym = "glXGetProcAddressARB";
+        }
+        // returns null on OSX, but that's fine
+        gladGetProcAddressPtr = cast(typeof(gladGetProcAddressPtr))libGL.symbol(sym);
+        return true;
+    }
+
+    return false;
+}
+
+private struct StructToDg {
+    void* instance;
+    void* func;
+}
+
+%(pre)s
+void* %(proc)s(string name) {
+    if(libGL is null) return null;
+    void* result;
+
+    if(gladGetProcAddressPtr !is null) {
+        // TODO: name.ptr
+        result = gladGetProcAddressPtr(name.ptr);
+    }
+    if(result is null) {
+        result = libGL.symbol(name);
+    }
+
+    return result;
+}
+
+%(pre)s
+void %(terminate)s() {
+    if(libGL !is null) {
+        libGL.free();
+    }
+    return;
+}
+'''

tools/glad-0.1.14a0/glad/lang/volt/loader/egl.py

@@ -0,0 +1,48 @@
+from glad.lang.common.loader import BaseLoader
+from glad.lang.d.loader.egl import _EGL_HAS_EXT as _D_EGL_HAS_EXT
+
+
+_EGL_LOADER = '''
+private struct StructToDg {
+    void* instance;
+    void* func;
+}
+
+private void* get_proc(string name) {
+    return eglGetProcAddress(arg.ptr);
+}
+
+bool gladLoadEGL() {
+    StructToDg structToDg;
+    structToDg.func = cast(void*)get_proc;
+    auto dg = *cast(Loader*)&structToDg;
+
+    return gladLoadEGL(dg);
+}
+'''
+_EGL_HAS_EXT = _D_EGL_HAS_EXT
+
+
+class EGLVoltLoader(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:
+            fobj.write(_EGL_LOADER)
+
+    def write_begin_load(self, fobj):
+        pass
+
+    def write_end_load(self, fobj):
+        fobj.write('\treturn true;')
+
+    def write_find_core(self, fobj):
+        pass
+
+    def write_has_ext(self, fobj):
+        fobj.write(_EGL_HAS_EXT)

tools/glad-0.1.14a0/glad/lang/volt/loader/gl.py

@@ -0,0 +1,60 @@
+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)

tools/glad-0.1.14a0/glad/lang/volt/loader/glx.py

@@ -0,0 +1,47 @@
+from glad.lang.common.loader import BaseLoader
+from glad.lang.volt.loader import LOAD_OPENGL_DLL
+
+
+_GLX_LOADER = \
+    LOAD_OPENGL_DLL % {'pre':'private', 'init':'open_gl',
+                       'proc':'get_proc', 'terminate':'close_gl'} + '''
+bool gladLoadGLX() {
+    StructToDg structToDg;
+    structToDg.func = cast(void*)get_proc;
+    auto dg = *cast(Loader*)&structToDg;
+
+    bool status = false;
+
+    if(open_gl()) {
+        status = gladLoadGLX(dg);
+        close_gl();
+    }
+
+    return status;
+}
+'''
+
+_GLX_HAS_EXT = '''
+private bool has_ext(const(char)* name) {
+    return true;
+}
+'''
+
+
+class GLXVoltLoader(BaseLoader):
+    def write(self, fobj):
+        fobj.write('import watt.library;\n')
+        if not self.disabled:
+            fobj.write(_GLX_LOADER)
+
+    def write_begin_load(self, fobj):
+        pass
+
+    def write_end_load(self, fobj):
+        fobj.write('\treturn true;\n')
+
+    def write_find_core(self, fobj):
+        pass
+
+    def write_has_ext(self, fobj):
+        fobj.write(_GLX_HAS_EXT)

tools/glad-0.1.14a0/glad/lang/volt/loader/wgl.py

@@ -0,0 +1,35 @@
+from glad.lang.common.loader import BaseLoader
+from glad.lang.volt.loader.glx import _GLX_LOADER
+
+
+_WGL_LOADER = _GLX_LOADER.replace('GLX', 'WGL')
+_WGL_HAS_EXT = '''
+private bool has_ext(const(char)* name) {
+    return true;
+}
+'''
+
+
+class WGLVoltLoader(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:
+            fobj.write(_WGL_LOADER)
+
+    def write_begin_load(self, fobj):
+        pass
+
+    def write_end_load(self, fobj):
+        fobj.write('\treturn true;\n')
+
+    def write_find_core(self, fobj):
+        pass
+
+    def write_has_ext(self, fobj):
+        fobj.write(_WGL_HAS_EXT)