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/* This file is part of Korman.
*
* Korman 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 3 of the License, or
* (at your option) any later version.
*
* Korman 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 Korman. If not, see <http://www.gnu.org/licenses/>.
*/
#include "texture.h"
#include "buffer.h"
#ifdef _WIN32
# define WIN32_LEAN_AND_MEAN
# define NOMINMAX
# include <windows.h>
#endif // _WIN32
#include <gl/gl.h>
#include <PRP/Surface/plMipmap.h>
#ifndef GL_GENERATE_MIPMAP
# define GL_GENERATE_MIPMAP 0x8191
#endif // GL_GENERATE_MIPMAP
extern "C" {
typedef struct {
PyObject_HEAD
PyObject* m_blenderImage;
bool m_ownIt;
GLint m_prevImage;
bool m_changedState;
GLint m_mipmapState;
} pyGLTexture;
typedef struct {
PyObject_HEAD
plMipmap* fThis;
bool fPyOwned;
} pyMipmap;
static void pyGLTexture_dealloc(pyGLTexture* self) {
if (self->m_blenderImage) Py_DECREF(self->m_blenderImage);
Py_TYPE(self)->tp_free((PyObject*)self);
}
static PyObject* pyGLTexture_new(PyTypeObject* type, PyObject* args, PyObject* kwds) {
pyGLTexture* self = (pyGLTexture*)type->tp_alloc(type, 0);
self->m_blenderImage = NULL;
self->m_ownIt = false;
self->m_prevImage = 0;
self->m_changedState = false;
self->m_mipmapState = 0;
return (PyObject*)self;
}
static int pyGLTexture___init__(pyGLTexture* self, PyObject* args, PyObject* kwds) {
PyObject* blender_image;
if (!PyArg_ParseTuple(args, "O", &blender_image)) {
PyErr_SetString(PyExc_TypeError, "expected a bpy.types.Image");
return -1;
}
// Save a reference to the Blender image
Py_INCREF(blender_image);
self->m_blenderImage = blender_image;
// Done!
return 0;
}
static PyObject* pyGLTexture__enter__(pyGLTexture* self) {
// Is the image already loaded?
PyObjectRef bindcode = PyObject_GetAttrString(self->m_blenderImage, "bindcode");
if (!PyLong_Check(bindcode)) {
PyErr_SetString(PyExc_RuntimeError, "Image bindcode isn't a long?");
return NULL;
}
glGetIntegerv(GL_TEXTURE_BINDING_2D, &self->m_prevImage);
GLuint image_bindcode = PyLong_AsUnsignedLong(bindcode);
self->m_ownIt = image_bindcode == 0;
// Load image into GL
if (self->m_ownIt) {
PyObjectRef new_bind = PyObject_CallMethod(self->m_blenderImage, "gl_load", NULL);
if (PyLong_AsSize_t(new_bind) != 0) {
PyErr_SetString(PyExc_RuntimeError, "failed to load image into GL");
return NULL;
}
bindcode = PyObject_GetAttrString(self->m_blenderImage, "bindcode");
image_bindcode = PyLong_AsUnsignedLong(bindcode);
}
// Set image as current in GL
if (self->m_prevImage != image_bindcode) {
self->m_changedState = true;
glBindTexture(GL_TEXTURE_2D, image_bindcode);
}
// Misc GL state
glGetTexParameteriv(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, &self->m_mipmapState);
Py_INCREF(self);
return (PyObject*)self;
}
static PyObject* pyGLTexture__exit__(pyGLTexture* self, PyObject*) {
// We don't care about the args here
glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, self->m_mipmapState);
if (self->m_changedState)
glBindTexture(GL_TEXTURE_2D, self->m_prevImage);
Py_RETURN_NONE;
}
static PyObject* pyGLTexture_generate_mipmap(pyGLTexture* self) {
glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, 1);
Py_RETURN_NONE;
}
struct _LevelData
{
GLint m_width;
GLint m_height;
uint8_t* m_data;
size_t m_dataSize;
_LevelData(GLint w, GLint h, uint8_t* ptr, size_t sz)
: m_width(w), m_height(h), m_data(ptr), m_dataSize(sz)
{ }
};
static _LevelData _get_level_data(pyGLTexture* self, GLint level, bool bgra, bool quiet) {
GLint width, height;
glGetTexLevelParameteriv(GL_TEXTURE_2D, level, GL_TEXTURE_WIDTH, &width);
glGetTexLevelParameteriv(GL_TEXTURE_2D, level, GL_TEXTURE_HEIGHT, &height);
GLenum fmt = bgra ? GL_BGRA_EXT : GL_RGBA;
if (!quiet)
PySys_WriteStdout(" Level #%i: %ix%i\n", level, width, height);
size_t bufsz;
bufsz = (width * height * 4);
uint8_t* buf = new uint8_t[bufsz];
glGetTexImage(GL_TEXTURE_2D, level, fmt, GL_UNSIGNED_BYTE, reinterpret_cast<GLvoid*>(buf));
return _LevelData(width, height, buf, bufsz);
}
static PyObject* pyGLTexture_get_level_data(pyGLTexture* self, PyObject* args, PyObject* kwargs) {
static char* kwlist[] = { _pycs("level"), _pycs("calc_alpha"), _pycs("bgra"),
_pycs("quiet"), _pycs("fast"), NULL };
GLint level = 0;
bool calc_alpha = false;
bool bgra = false;
bool quiet = false;
bool fast = false;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|ibbbb", kwlist, &level, &calc_alpha, &bgra, &quiet, &fast)) {
PyErr_SetString(PyExc_TypeError, "get_level_data expects an optional int, bool, bool, bool, bool");
return NULL;
}
_LevelData data = _get_level_data(self, level, bgra, quiet);
if (fast)
return pyBuffer_Steal(data.m_data, data.m_dataSize);
// OpenGL returns a flipped image, so we must reflip it.
size_t row_stride = data.m_width * 4;
uint8_t* sptr = data.m_data;
uint8_t* eptr = data.m_data + (data.m_dataSize - row_stride);
uint8_t* temp = new uint8_t[row_stride];
do {
memcpy(temp, sptr, row_stride);
memcpy(sptr, eptr, row_stride);
memcpy(eptr, temp, row_stride);
} while ((sptr += row_stride) < (eptr -= row_stride));
delete[] temp;
if (calc_alpha) {
for (size_t i = 0; i < data.m_dataSize; i += 4)
data.m_data[i + 3] = (data.m_data[i + 0] + data.m_data[i + 1] + data.m_data[i + 2]) / 3;
}
return pyBuffer_Steal(data.m_data, data.m_dataSize);
}
static PyObject* pyGLTexture_store_in_mipmap(pyGLTexture* self, PyObject* args) {
pyMipmap* pymipmap;
PyObject* levels;
size_t compression;
if (!PyArg_ParseTuple(args, "OOn", &pymipmap, &levels, &compression) || !PySequence_Check(levels)) {
PyErr_SetString(PyExc_TypeError, "store_in_mipmap expects a plMipmap, sequence of Buffer and int");
return NULL;
}
// Since we actually have no way of knowing if that really is a pyMipmap...
plMipmap* mipmap = plMipmap::Convert(pymipmap->fThis, false);
if (!mipmap) {
PyErr_SetString(PyExc_TypeError, "store_in_mipmap expects a plMipmap, sequence of Buffer and int");
return NULL;
}
for (Py_ssize_t i = 0; i < PySequence_Size(levels); ++i) {
pyBuffer* item = (pyBuffer*)PySequence_GetItem(levels, i);
if (!pyBuffer_Check((PyObject*)item)) {
PyErr_SetString(PyExc_TypeError, "store_in_mipmap expects a plMipmap, sequence of Buffer and int");
return NULL;
}
if (compression == plBitmap::kDirectXCompression)
mipmap->CompressImage(i, item->m_buffer, item->m_size);
else
mipmap->setLevelData(i, item->m_buffer, item->m_size);
}
Py_RETURN_NONE;
}
static PyMethodDef pyGLTexture_Methods[] = {
{ _pycs("__enter__"), (PyCFunction)pyGLTexture__enter__, METH_NOARGS, NULL },
{ _pycs("__exit__"), (PyCFunction)pyGLTexture__enter__, METH_VARARGS, NULL },
{ _pycs("generate_mipmap"), (PyCFunction)pyGLTexture_generate_mipmap, METH_NOARGS, NULL },
{ _pycs("get_level_data"), (PyCFunction)pyGLTexture_get_level_data, METH_KEYWORDS | METH_VARARGS, NULL },
{ _pycs("store_in_mipmap"), (PyCFunction)pyGLTexture_store_in_mipmap, METH_VARARGS, NULL },
{ NULL, NULL, 0, NULL }
};
static PyObject* pyGLTexture_get_has_alpha(pyGLTexture* self, void*) {
_LevelData data = _get_level_data(self, 0, false, true);
for (size_t i = 3; i < data.m_dataSize; i += 4) {
if (data.m_data[i] != 255) {
delete[] data.m_data;
return PyBool_FromLong(1);
}
}
delete[] data.m_data;
return PyBool_FromLong(0);
}
static PyGetSetDef pyGLTexture_GetSet[] = {
{ _pycs("has_alpha"), (getter)pyGLTexture_get_has_alpha, NULL, NULL, NULL },
{ NULL, NULL, NULL, NULL, NULL }
};
PyTypeObject pyGLTexture_Type = {
PyVarObject_HEAD_INIT(NULL, 0)
"_korlib.GLTexture", /* tp_name */
sizeof(pyGLTexture), /* tp_basicsize */
0, /* tp_itemsize */
(destructor)pyGLTexture_dealloc, /* tp_dealloc */
NULL, /* tp_print */
NULL, /* tp_getattr */
NULL, /* tp_setattr */
NULL, /* tp_compare */
NULL, /* tp_repr */
NULL, /* tp_as_number */
NULL, /* tp_as_sequence */
NULL, /* tp_as_mapping */
NULL, /* tp_hash */
NULL, /* tp_call */
NULL, /* tp_str */
NULL, /* tp_getattro */
NULL, /* tp_setattro */
NULL, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
"GLTexture", /* tp_doc */
NULL, /* tp_traverse */
NULL, /* tp_clear */
NULL, /* tp_richcompare */
0, /* tp_weaklistoffset */
NULL, /* tp_iter */
NULL, /* tp_iternext */
pyGLTexture_Methods, /* tp_methods */
NULL, /* tp_members */
pyGLTexture_GetSet, /* tp_getset */
NULL, /* tp_base */
NULL, /* tp_dict */
NULL, /* tp_descr_get */
NULL, /* tp_descr_set */
0, /* tp_dictoffset */
(initproc)pyGLTexture___init__, /* tp_init */
NULL, /* tp_alloc */
pyGLTexture_new, /* tp_new */
NULL, /* tp_free */
NULL, /* tp_is_gc */
NULL, /* tp_bases */
NULL, /* tp_mro */
NULL, /* tp_cache */
NULL, /* tp_subclasses */
NULL, /* tp_weaklist */
NULL, /* tp_del */
0, /* tp_version_tag */
NULL, /* tp_finalize */
};
PyObject* Init_pyGLTexture_Type() {
if (PyType_Ready(&pyGLTexture_Type) < 0)
return NULL;
Py_INCREF(&pyGLTexture_Type);
return (PyObject*)&pyGLTexture_Type;
}
};