text: /*
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version 2
   * of the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
   */
  
  /** \file
   * \ingroup bpygpu
   *
   * This file defines the gpu.state API.
   *
   * - Use ``bpygpu_`` for local API.
   * - Use ``BPyGPU`` for public API.
   */
  
  #include <Python.h>
  
  #include "GPU_state.h"
  
  #include "../generic/py_capi_utils.h"
  #include "../generic/python_utildefines.h"
  
  #include "gpu_py_state.h" /* own include */
  
  /* -------------------------------------------------------------------- */
  /** \name Helper Functions
   * \{ */
  
  static const struct PyC_StringEnumItems pygpu_state_blend_items[] = {
      {GPU_BLEND_NONE, "NONE"},
      {GPU_BLEND_ALPHA, "ALPHA"},
      {GPU_BLEND_ALPHA_PREMULT, "ALPHA_PREMULT"},
      {GPU_BLEND_ADDITIVE, "ADDITIVE"},
      {GPU_BLEND_ADDITIVE_PREMULT, "ADDITIVE_PREMULT"},
      {GPU_BLEND_MULTIPLY, "MULTIPLY"},
      {GPU_BLEND_SUBTRACT, "SUBTRACT"},
      {GPU_BLEND_INVERT, "INVERT"},
      /**
       * These are quite special cases used inside the draw manager.
       * {GPU_BLEND_OIT, "OIT"},
       * {GPU_BLEND_BACKGROUND, "BACKGROUND"},
       * {GPU_BLEND_CUSTOM, "CUSTOM"},
       */
      {0, NULL},
  };
  
  static const struct PyC_StringEnumItems pygpu_state_depthtest_items[] = {
      {GPU_DEPTH_NONE, "NONE"},
      {GPU_DEPTH_ALWAYS, "ALWAYS"},
      {GPU_DEPTH_LESS, "LESS"},
      {GPU_DEPTH_LESS_EQUAL, "LESS_EQUAL"},
      {GPU_DEPTH_EQUAL, "EQUAL"},
      {GPU_DEPTH_GREATER, "GREATER"},
      {GPU_DEPTH_GREATER_EQUAL, "GREATER_EQUAL"},
      {0, NULL},
  };
  
  static const struct PyC_StringEnumItems pygpu_state_faceculling_items[] = {
      {GPU_CULL_NONE, "NONE"},
      {GPU_CULL_FRONT, "FRONT"},
      {GPU_CULL_BACK, "BACK"},
      {0, NULL},
  };
  
  /** \} */
  
  /* -------------------------------------------------------------------- */
  /** \name Manage Stack
   * \{ */
  
  PyDoc_STRVAR(pygpu_state_blend_set_doc,
               ".. function:: blend_set(mode)\n"
               "\n"
               "   Defines the fixed pipeline blending equation.\n"
               "\n"
               "   :param mode: One of these modes: {\n"
               "      `NONE`,\n"
               "      `ALPHA`,\n"
               "      `ALPHA_PREMULT`,\n"
               "      `ADDITIVE`,\n"
               "      `ADDITIVE_PREMULT`,\n"
               "      `MULTIPLY`,\n"
               "      `SUBTRACT`,\n"
               "      `INVERT`,\n"
               //"      `OIT`,\n"
               //"      `BACKGROUND`,\n"
               //"      `CUSTOM`,\n"
               "   :type mode: `str`\n");
  static PyObject *pygpu_state_blend_set(PyObject *UNUSED(self), PyObject *value)
  {
    struct PyC_StringEnum pygpu_blend = {pygpu_state_blend_items};
    if (!PyC_ParseStringEnum(value, &pygpu_blend)) {
      return NULL;
    }
    GPU_blend(pygpu_blend.value_found);
    Py_RETURN_NONE;
  }
  
  PyDoc_STRVAR(pygpu_state_blend_get_doc,
               ".. function:: blend_get()\n"
               "\n"
               "    Current blending equation.\n"
               "\n");
  static PyObject *pygpu_state_blend_get(PyObject *UNUSED(self))
  {
    eGPUBlend blend = GPU_blend_get();
    return PyUnicode_FromString(PyC_StringEnum_FindIDFromValue(pygpu_state_blend_items, blend));
  }
  
  PyDoc_STRVAR(pygpu_state_depth_test_set_doc,
               ".. function:: depth_test_set(mode)\n"
               "\n"
               "   Defines the depth_test equation.\n"
               "\n"
               "   :param mode: One of these modes: {\n"
               "      `NONE`,\n"
               "      `ALWAYS`,\n"
               "      `LESS`,\n"
               "      `LESS_EQUAL`,\n"
               "      `EQUAL`,\n"
               "      `GREATER`,\n"
               "      `GREATER_EQUAL`,\n"
               "   :type mode: `str`\n");
  static PyObject *pygpu_state_depth_test_set(PyObject *UNUSED(self), PyObject *value)
  {
    struct PyC_StringEnum pygpu_depth_test = {pygpu_state_depthtest_items};
    if (!PyC_ParseStringEnum(value, &pygpu_depth_test)) {
      return NULL;
    }
    GPU_depth_test(pygpu_depth_test.value_found);
    Py_RETURN_NONE;
  }
  
  PyDoc_STRVAR(pygpu_state_depth_test_get_doc,
               ".. function:: blend_depth_test_get()\n"
               "\n"
               "    Current depth_test equation.\n"
               "\n");
  static PyObject *pygpu_state_depth_test_get(PyObject *UNUSED(self))
  {
    eGPUDepthTest test = GPU_depth_test_get();
    return PyUnicode_FromString(PyC_StringEnum_FindIDFromValue(pygpu_state_depthtest_items, test));
  }
  
  PyDoc_STRVAR(pygpu_state_depth_mask_set_doc,
               ".. function:: depth_mask_set(value)\n"
               "\n"
               "   Write to depth component.\n"
               "\n"
               "   :param value: True for writing to the depth component.\n"
               "   :type near: `bool`\n");
  static PyObject *pygpu_state_depth_mask_set(PyObject *UNUSED(self), PyObject *value)
  {
    bool write_to_depth;
    if (!PyC_ParseBool(value, &write_to_depth)) {
      return NULL;
    }
    GPU_depth_mask(write_to_depth);
    Py_RETURN_NONE;
  }
  
  PyDoc_STRVAR(pygpu_state_depth_mask_get_doc,
               ".. function:: depth_mask_set_get()\n"
               "\n"
               "   Writing status in the depth component.\n");
  static PyObject *pygpu_state_depth_mask_get(PyObject *UNUSED(self))
  {
    return PyBool_FromLong(GPU_depth_mask_get());
  }
  
  PyDoc_STRVAR(pygpu_state_viewport_set_doc,
               ".. function:: viewport_set(x, y, xsize, ysize)\n"
               "\n"
               "   Specifies the viewport of the active framebuffer.\n"
               "   Note: The viewport state is not saved upon framebuffer rebind.\n"
               "\n"
               "   :param x, y: lower left corner of the viewport_set rectangle, in pixels.\n"
               "   :param width, height: width and height of the viewport_set.\n"
               "   :type x, y, xsize, ysize: `int`\n");
  static PyObject *pygpu_state_viewport_set(PyObject *UNUSED(self), PyObject *args)
  {
    int x, y, xsize, ysize;
    if (!PyArg_ParseTuple(args, "iiii:viewport_set", &x, &y, &xsize, &ysize)) {
      return NULL;
    }
  
    GPU_viewport(x, y, xsize, ysize);
    Py_RETURN_NONE;
  }
  
  PyDoc_STRVAR(pygpu_state_viewport_get_doc,
               ".. function:: viewport_get()\n"
               "\n"
               "   Viewport of the active framebuffer.\n");
  static PyObject *pygpu_state_viewport_get(PyObject *UNUSED(self), PyObject *UNUSED(args))
  {
    int viewport[4];
    GPU_viewport_size_get_i(viewport);
  
    PyObject *ret = PyTuple_New(4);
    PyTuple_SET_ITEMS(ret,
                      PyLong_FromLong(viewport[0]),
                      PyLong_FromLong(viewport[1]),
                      PyLong_FromLong(viewport[2]),
                      PyLong_FromLong(viewport[3]));
    return ret;
  }
  
  PyDoc_STRVAR(pygpu_state_line_width_set_doc,
               ".. function:: line_width_set(width)\n"
               "\n"
               "   Specify the width of rasterized lines.\n"
               "\n"
               "   :param size: New width.\n"
               "   :type mode: `float`\n");
  static PyObject *pygpu_state_line_width_set(PyObject *UNUSED(self), PyObject *value)
  {
    float width = (float)PyFloat_AsDouble(value);
    if (PyErr_Occurred()) {
      return NULL;
    }
  
    GPU_line_width(width);
    Py_RETURN_NONE;
  }
  
  PyDoc_STRVAR(pygpu_state_line_width_get_doc,
               ".. function:: line_width_get()\n"
               "\n"
               "   Current width of rasterized lines.\n");
  static PyObject *pygpu_state_line_width_get(PyObject *UNUSED(self))
  {
    float width = GPU_line_width_get();
    return PyFloat_FromDouble((double)width);
  }
  
  PyDoc_STRVAR(pygpu_state_point_size_set_doc,
               ".. function:: point_size_set(size)\n"
               "\n"
               "   Specify the diameter of rasterized points.\n"
               "\n"
               "   :param size: New diameter.\n"
               "   :type mode: `float`\n");
  static PyObject *pygpu_state_point_size_set(PyObject *UNUSED(self), PyObject *value)
  {
    float size = (float)PyFloat_AsDouble(value);
    if (PyErr_Occurred()) {
      return NULL;
    }
  
    GPU_point_size(size);
    Py_RETURN_NONE;
  }
  
  PyDoc_STRVAR(pygpu_state_color_mask_set_doc,
               ".. function:: color_mask_set(r, g, b, a)\n"
               "\n"
               "   Enable or disable writing of frame buffer color components.\n"
               "\n"
               "   :param r, g, b, a: components red, green, blue, and alpha.\n"
               "   :type r, g, b, a: `bool`\n");
  static PyObject *pygpu_state_color_mask_set(PyObject *UNUSED(self), PyObject *args)
  {
    int r, g, b, a;
    if (!PyArg_ParseTuple(args, "pppp:color_mask_set", &r, &g, &b, &a)) {
      return NULL;
    }
  
    GPU_color_mask((bool)r, (bool)g, (bool)b, (bool)a);
    Py_RETURN_NONE;
  }
  
  PyDoc_STRVAR(pygpu_state_face_culling_set_doc,
               ".. function:: face_culling_set(culling)\n"
               "\n"
               "   Specify whether none, front-facing or back-facing facets can be culled.\n"
               "\n"
               "   :param mode: One of these modes: {\n"
               "      `NONE`,\n"
               "      `FRONT`,\n"
               "      `BACK`,\n"
               "   :type mode: `str`\n");
  static PyObject *pygpu_state_face_culling_set(PyObject *UNUSED(self), PyObject *value)
  {
    struct PyC_StringEnum pygpu_faceculling = {pygpu_state_faceculling_items};
    if (!PyC_ParseStringEnum(value, &pygpu_faceculling)) {
      return NULL;
    }
  
    GPU_face_culling(pygpu_faceculling.value_found);
    Py_RETURN_NONE;
  }
  
  PyDoc_STRVAR(pygpu_state_front_facing_set_doc,
               ".. function:: front_facing_set(invert)\n"
               "\n"
               "   Specifies the orientation of front-facing polygons.\n"
               "\n"
               "   :param invert: True for clockwise polygons as front-facing.\n"
               "   :type mode: `bool`\n");
  static PyObject *pygpu_state_front_facing_set(PyObject *UNUSED(self), PyObject *value)
  {
    bool invert;
    if (!PyC_ParseBool(value, &invert)) {
      return NULL;
    }
  
    GPU_front_facing(invert);
    Py_RETURN_NONE;
  }
  
  PyDoc_STRVAR(pygpu_state_program_point_size_set_doc,
               ".. function:: use_program_point_size(enable)\n"
               "\n"
               "   If enabled, the derived point size is taken from the (potentially clipped) "
               "shader builtin gl_PointSize.\n"
               "\n"
               "   :param enable: True for shader builtin gl_PointSize.\n"
               "   :type enable: `bool`\n");
  static PyObject *pygpu_state_program_point_size_set(PyObject *UNUSED(self), PyObject *value)
  {
    bool enable;
    if (!PyC_ParseBool(value, &enable)) {
      return NULL;
    }
  
    GPU_program_point_size(enable);
    Py_RETURN_NONE;
  }
  
  /** \} */
  
  /* -------------------------------------------------------------------- */
  /** \name Module
   * \{ */
  
  static struct PyMethodDef pygpu_state__tp_methods[] = {
      /* Manage Stack */
      {"blend_set", (PyCFunction)pygpu_state_blend_set, METH_O, pygpu_state_blend_set_doc},
      {"blend_get", (PyCFunction)pygpu_state_blend_get, METH_NOARGS, pygpu_state_blend_get_doc},
      {"depth_test_set",
       (PyCFunction)pygpu_state_depth_test_set,
       METH_O,
       pygpu_state_depth_test_set_doc},
      {"depth_test_get",
       (PyCFunction)pygpu_state_depth_test_get,
       METH_NOARGS,
       pygpu_state_depth_test_get_doc},
      {"depth_mask_set",
       (PyCFunction)pygpu_state_depth_mask_set,
       METH_O,
       pygpu_state_depth_mask_set_doc},
      {"depth_mask_get",
       (PyCFunction)pygpu_state_depth_mask_get,
       METH_NOARGS,
       pygpu_state_depth_mask_get_doc},
      {"viewport_set",
       (PyCFunction)pygpu_state_viewport_set,
       METH_VARARGS,
       pygpu_state_viewport_set_doc},
      {"viewport_get",
       (PyCFunction)pygpu_state_viewport_get,
       METH_NOARGS,
       pygpu_state_viewport_get_doc},
      {"line_width_set",
       (PyCFunction)pygpu_state_line_width_set,
       METH_O,
       pygpu_state_line_width_set_doc},
      {"line_width_get",
       (PyCFunction)pygpu_state_line_width_get,
       METH_NOARGS,
       pygpu_state_line_width_get_doc},
      {"point_size_set",
       (PyCFunction)pygpu_state_point_size_set,
       METH_O,
       pygpu_state_point_size_set_doc},
      {"color_mask_set",
       (PyCFunction)pygpu_state_color_mask_set,
       METH_VARARGS,
       pygpu_state_color_mask_set_doc},
      {"face_culling_set",
       (PyCFunction)pygpu_state_face_culling_set,
       METH_O,
       pygpu_state_face_culling_set_doc},
      {"front_facing_set",
       (PyCFunction)pygpu_state_front_facing_set,
       METH_O,
       pygpu_state_front_facing_set_doc},
      {"program_point_size_set",
       (PyCFunction)pygpu_state_program_point_size_set,
       METH_O,
       pygpu_state_program_point_size_set_doc},
      {NULL, NULL, 0, NULL},
  };
  
  PyDoc_STRVAR(pygpu_state__tp_doc, "This module provides access to the gpu state.");
  static PyModuleDef pygpu_state_module_def = {
      PyModuleDef_HEAD_INIT,
      .m_name = "gpu.state",
      .m_doc = pygpu_state__tp_doc,
      .m_methods = pygpu_state__tp_methods,
  };
  
  PyObject *bpygpu_state_init(void)
  {
    PyObject *submodule;
  
    submodule = PyModule_Create(&pygpu_state_module_def);
  
    return submodule;
  }
  
  /** \} */
  