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blender/source/gameengine/VideoTexture/ImageViewport.cpp
Campbell Barton 8c1cb10cfd code cleanup: unused vars, make other vars static.
2013-04-10 22:49:50 +00:00

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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* 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.
*
* Copyright (c) 2007 The Zdeno Ash Miklas
*
* This source file is part of VideoTexture library
*
* Contributor(s):
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file gameengine/VideoTexture/ImageViewport.cpp
* \ingroup bgevideotex
*/
// implementation
#include "PyObjectPlus.h"
#include <structmember.h>
#include "GL/glew.h"
#include "KX_PythonInit.h"
#include "Texture.h"
#include "ImageBase.h"
#include "VideoBase.h"
#include "FilterSource.h"
#include "ImageViewport.h"
// constructor
ImageViewport::ImageViewport (void) : m_alpha(false), m_texInit(false)
{
// get viewport rectangle
RAS_Rect rect = KX_GetActiveEngine()->GetCanvas()->GetWindowArea();
m_viewport[0] = rect.GetLeft();
m_viewport[1] = rect.GetBottom();
m_viewport[2] = rect.GetWidth();
m_viewport[3] = rect.GetHeight();
//glGetIntegerv(GL_VIEWPORT, m_viewport);
// create buffer for viewport image
// Warning: this buffer is also used to get the depth buffer as an array of
// float (1 float = 4 bytes per pixel)
m_viewportImage = new BYTE [4 * getViewportSize()[0] * getViewportSize()[1]];
// set attributes
setWhole(false);
}
// destructor
ImageViewport::~ImageViewport (void)
{
delete [] m_viewportImage;
}
// use whole viewport to capture image
void ImageViewport::setWhole (bool whole)
{
// set whole
m_whole = whole;
// set capture size to viewport size, if whole,
// otherwise place area in the middle of viewport
for (int idx = 0; idx < 2; ++idx)
{
// capture size
m_capSize[idx] = whole ? short(getViewportSize()[idx])
: calcSize(short(getViewportSize()[idx]));
// position
m_position[idx] = whole ? 0 : ((getViewportSize()[idx] - m_capSize[idx]) >> 1);
}
// init image
init(m_capSize[0], m_capSize[1]);
// set capture position
setPosition();
}
void ImageViewport::setCaptureSize (short size[2])
{
m_whole = false;
if (size == NULL)
size = m_capSize;
for (int idx = 0; idx < 2; ++idx)
{
if (size[idx] < 1)
m_capSize[idx] = 1;
else if (size[idx] > getViewportSize()[idx])
m_capSize[idx] = short(getViewportSize()[idx]);
else
m_capSize[idx] = size[idx];
}
init(m_capSize[0], m_capSize[1]);
// set capture position
setPosition();
}
// set position of capture rectangle
void ImageViewport::setPosition (GLint pos[2])
{
// if new position is not provided, use existing position
if (pos == NULL) pos = m_position;
// save position
for (int idx = 0; idx < 2; ++idx)
m_position[idx] = pos[idx] < 0 ? 0 : pos[idx] >= getViewportSize()[idx]
- m_capSize[idx] ? getViewportSize()[idx] - m_capSize[idx] : pos[idx];
// recalc up left corner
for (int idx = 0; idx < 2; ++idx)
m_upLeft[idx] = m_position[idx] + m_viewport[idx];
}
// capture image from viewport
void ImageViewport::calcImage (unsigned int texId, double ts)
{
// if scale was changed
if (m_scaleChange)
// reset image
init(m_capSize[0], m_capSize[1]);
// if texture wasn't initialized
if (!m_texInit) {
// initialize it
loadTexture(texId, m_image, m_size);
m_texInit = true;
}
// if texture can be directly created
if (texId != 0 && m_pyfilter == NULL && m_capSize[0] == calcSize(m_capSize[0])
&& m_capSize[1] == calcSize(m_capSize[1]) && !m_flip && !m_zbuff && !m_depth)
{
// just copy current viewport to texture
glBindTexture(GL_TEXTURE_2D, texId);
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, m_upLeft[0], m_upLeft[1], (GLsizei)m_capSize[0], (GLsizei)m_capSize[1]);
// image is not available
m_avail = false;
}
// otherwise copy viewport to buffer, if image is not available
else if (!m_avail) {
if (m_zbuff) {
// Use read pixels with the depth buffer
// *** misusing m_viewportImage here, but since it has the correct size
// (4 bytes per pixel = size of float) and we just need it to apply
// the filter, it's ok
glReadPixels(m_upLeft[0], m_upLeft[1], (GLsizei)m_capSize[0], (GLsizei)m_capSize[1],
GL_DEPTH_COMPONENT, GL_FLOAT, m_viewportImage);
// filter loaded data
FilterZZZA filt;
filterImage(filt, (float *)m_viewportImage, m_capSize);
}
else {
if (m_depth) {
// Use read pixels with the depth buffer
// See warning above about m_viewportImage.
glReadPixels(m_upLeft[0], m_upLeft[1], (GLsizei)m_capSize[0], (GLsizei)m_capSize[1],
GL_DEPTH_COMPONENT, GL_FLOAT, m_viewportImage);
// filter loaded data
FilterDEPTH filt;
filterImage(filt, (float *)m_viewportImage, m_capSize);
}
else {
// get frame buffer data
if (m_alpha) {
glReadPixels(m_upLeft[0], m_upLeft[1], (GLsizei)m_capSize[0], (GLsizei)m_capSize[1], GL_RGBA,
GL_UNSIGNED_BYTE, m_viewportImage);
// filter loaded data
FilterRGBA32 filt;
filterImage(filt, m_viewportImage, m_capSize);
}
else {
glReadPixels(m_upLeft[0], m_upLeft[1], (GLsizei)m_capSize[0], (GLsizei)m_capSize[1], GL_RGB,
GL_UNSIGNED_BYTE, m_viewportImage);
// filter loaded data
FilterRGB24 filt;
filterImage(filt, m_viewportImage, m_capSize);
}
}
}
}
}
// cast Image pointer to ImageViewport
inline ImageViewport * getImageViewport (PyImage *self)
{ return static_cast<ImageViewport*>(self->m_image); }
// python methods
// get whole
PyObject *ImageViewport_getWhole (PyImage *self, void *closure)
{
if (self->m_image != NULL && getImageViewport(self)->getWhole()) Py_RETURN_TRUE;
else Py_RETURN_FALSE;
}
// set whole
int ImageViewport_setWhole(PyImage *self, PyObject *value, void *closure)
{
// check parameter, report failure
if (value == NULL || !PyBool_Check(value))
{
PyErr_SetString(PyExc_TypeError, "The value must be a bool");
return -1;
}
try
{
// set whole, can throw in case of resize and buffer exports
if (self->m_image != NULL) getImageViewport(self)->setWhole(value == Py_True);
}
catch (Exception & exp)
{
exp.report();
return -1;
}
// success
return 0;
}
// get alpha
PyObject *ImageViewport_getAlpha (PyImage *self, void *closure)
{
if (self->m_image != NULL && getImageViewport(self)->getAlpha()) Py_RETURN_TRUE;
else Py_RETURN_FALSE;
}
// set whole
int ImageViewport_setAlpha(PyImage *self, PyObject *value, void *closure)
{
// check parameter, report failure
if (value == NULL || !PyBool_Check(value))
{
PyErr_SetString(PyExc_TypeError, "The value must be a bool");
return -1;
}
// set alpha
if (self->m_image != NULL) getImageViewport(self)->setAlpha(value == Py_True);
// success
return 0;
}
// get position
static PyObject *ImageViewport_getPosition (PyImage *self, void *closure)
{
GLint *pos = getImageViewport(self)->getPosition();
PyObject *ret = PyTuple_New(2);
PyTuple_SET_ITEM(ret, 0, PyLong_FromLong(pos[0]));
PyTuple_SET_ITEM(ret, 1, PyLong_FromLong(pos[1]));
return ret;
}
// set position
static int ImageViewport_setPosition(PyImage *self, PyObject *value, void *closure)
{
// check validity of parameter
if (value == NULL ||
!(PyTuple_Check(value) || PyList_Check(value)) ||
PySequence_Fast_GET_SIZE(value) != 2 ||
!PyLong_Check(PySequence_Fast_GET_ITEM(value, 0)) ||
!PyLong_Check(PySequence_Fast_GET_ITEM(value, 1)))
{
PyErr_SetString(PyExc_TypeError, "The value must be a sequence of 2 ints");
return -1;
}
// set position
GLint pos[2] = {
GLint(PyLong_AsLong(PySequence_Fast_GET_ITEM(value, 0))),
GLint(PyLong_AsLong(PySequence_Fast_GET_ITEM(value, 1)))
};
getImageViewport(self)->setPosition(pos);
// success
return 0;
}
// get capture size
PyObject *ImageViewport_getCaptureSize (PyImage *self, void *closure)
{
short *size = getImageViewport(self)->getCaptureSize();
PyObject *ret = PyTuple_New(2);
PyTuple_SET_ITEM(ret, 0, PyLong_FromLong(size[0]));
PyTuple_SET_ITEM(ret, 1, PyLong_FromLong(size[1]));
return ret;
}
// set capture size
int ImageViewport_setCaptureSize(PyImage *self, PyObject *value, void *closure)
{
// check validity of parameter
if (value == NULL ||
!(PyTuple_Check(value) || PyList_Check(value)) ||
PySequence_Fast_GET_SIZE(value) != 2 ||
!PyLong_Check(PySequence_Fast_GET_ITEM(value, 0)) ||
!PyLong_Check(PySequence_Fast_GET_ITEM(value, 1)))
{
PyErr_SetString(PyExc_TypeError, "The value must be a sequence of 2 ints");
return -1;
}
// set capture size
short size[2] = {
short(PyLong_AsLong(PySequence_Fast_GET_ITEM(value, 0))),
short(PyLong_AsLong(PySequence_Fast_GET_ITEM(value, 1)))
};
try
{
// can throw in case of resize and buffer exports
getImageViewport(self)->setCaptureSize(size);
}
catch (Exception & exp)
{
exp.report();
return -1;
}
// success
return 0;
}
// methods structure
static PyMethodDef imageViewportMethods[] =
{ // methods from ImageBase class
{"refresh", (PyCFunction)Image_refresh, METH_NOARGS, "Refresh image - invalidate its current content"},
{NULL}
};
// attributes structure
static PyGetSetDef imageViewportGetSets[] =
{
{(char*)"whole", (getter)ImageViewport_getWhole, (setter)ImageViewport_setWhole, (char*)"use whole viewport to capture", NULL},
{(char*)"position", (getter)ImageViewport_getPosition, (setter)ImageViewport_setPosition, (char*)"upper left corner of captured area", NULL},
{(char*)"capsize", (getter)ImageViewport_getCaptureSize, (setter)ImageViewport_setCaptureSize, (char*)"size of viewport area being captured", NULL},
{(char*)"alpha", (getter)ImageViewport_getAlpha, (setter)ImageViewport_setAlpha, (char*)"use alpha in texture", NULL},
// attributes from ImageBase class
{(char*)"valid", (getter)Image_valid, NULL, (char*)"bool to tell if an image is available", NULL},
{(char*)"image", (getter)Image_getImage, NULL, (char*)"image data", NULL},
{(char*)"size", (getter)Image_getSize, NULL, (char*)"image size", NULL},
{(char*)"scale", (getter)Image_getScale, (setter)Image_setScale, (char*)"fast scale of image (near neighbor)", NULL},
{(char*)"flip", (getter)Image_getFlip, (setter)Image_setFlip, (char*)"flip image vertically", NULL},
{(char*)"zbuff", (getter)Image_getZbuff, (setter)Image_setZbuff, (char*)"use depth buffer as texture", NULL},
{(char*)"depth", (getter)Image_getDepth, (setter)Image_setDepth, (char*)"get depth information from z-buffer as array of float", NULL},
{(char*)"filter", (getter)Image_getFilter, (setter)Image_setFilter, (char*)"pixel filter", NULL},
{NULL}
};
// define python type
PyTypeObject ImageViewportType = {
PyVarObject_HEAD_INIT(NULL, 0)
"VideoTexture.ImageViewport", /*tp_name*/
sizeof(PyImage), /*tp_basicsize*/
0, /*tp_itemsize*/
(destructor)Image_dealloc, /*tp_dealloc*/
0, /*tp_print*/
0, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
0, /*tp_repr*/
0, /*tp_as_number*/
0, /*tp_as_sequence*/
0, /*tp_as_mapping*/
0, /*tp_hash */
0, /*tp_call*/
0, /*tp_str*/
0, /*tp_getattro*/
0, /*tp_setattro*/
&imageBufferProcs, /*tp_as_buffer*/
Py_TPFLAGS_DEFAULT, /*tp_flags*/
"Image source from viewport", /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
imageViewportMethods, /* tp_methods */
0, /* tp_members */
imageViewportGetSets, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
(initproc)Image_init<ImageViewport>, /* tp_init */
0, /* tp_alloc */
Image_allocNew, /* tp_new */
};
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