--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-2.6.1/Modules/imgfile.c Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,509 @@
+
+/* IMGFILE module - Interface to sgi libimage */
+
+/* XXX This module should be done better at some point. It should return
+** an object of image file class, and have routines to manipulate these
+** image files in a neater way (so you can get rgb images off a greyscale
+** file, for instance, or do a straight display without having to get the
+** image bits into python, etc).
+**
+** Warning: this module is very non-reentrant (esp. the readscaled stuff)
+*/
+
+#include "Python.h"
+
+#include <gl/image.h>
+
+#include "/usr/people/4Dgifts/iristools/include/izoom.h"
+
+/* Bunch of missing extern decls; keep gcc -Wall happy... */
+extern void i_seterror();
+extern void iclose();
+extern void filterzoom();
+extern void putrow();
+extern void getrow();
+
+static PyObject * ImgfileError; /* Exception we raise for various trouble */
+
+static int top_to_bottom; /* True if we want top-to-bottom images */
+
+/* The image library does not always call the error hander :-(,
+ therefore we have a global variable indicating that it was called.
+ It is cleared by imgfile_open(). */
+
+static int error_called;
+
+
+/* The error handler */
+
+static void
+imgfile_error(char *str)
+{
+ PyErr_SetString(ImgfileError, str);
+ error_called = 1;
+ return; /* To imglib, which will return a failure indicator */
+}
+
+
+/* Open an image file and return a pointer to it.
+ Make sure we raise an exception if we fail. */
+
+static IMAGE *
+imgfile_open(char *fname)
+{
+ IMAGE *image;
+ i_seterror(imgfile_error);
+ error_called = 0;
+ errno = 0;
+ if ( (image = iopen(fname, "r")) == NULL ) {
+ /* Error may already be set by imgfile_error */
+ if ( !error_called ) {
+ if (errno)
+ PyErr_SetFromErrno(ImgfileError);
+ else
+ PyErr_SetString(ImgfileError,
+ "Can't open image file");
+ }
+ return NULL;
+ }
+ return image;
+}
+
+static PyObject *
+imgfile_ttob(PyObject *self, PyObject *args)
+{
+ int newval;
+ PyObject *rv;
+
+ if (!PyArg_ParseTuple(args, "i:ttob", &newval))
+ return NULL;
+ rv = PyInt_FromLong(top_to_bottom);
+ top_to_bottom = newval;
+ return rv;
+}
+
+static PyObject *
+imgfile_read(PyObject *self, PyObject *args)
+{
+ char *fname;
+ PyObject *rv;
+ int xsize, ysize, zsize;
+ char *cdatap;
+ long *idatap;
+ static short rs[8192], gs[8192], bs[8192];
+ int x, y;
+ IMAGE *image;
+ int yfirst, ylast, ystep;
+
+ if ( !PyArg_ParseTuple(args, "s:read", &fname) )
+ return NULL;
+
+ if ( (image = imgfile_open(fname)) == NULL )
+ return NULL;
+
+ if ( image->colormap != CM_NORMAL ) {
+ iclose(image);
+ PyErr_SetString(ImgfileError,
+ "Can only handle CM_NORMAL images");
+ return NULL;
+ }
+ if ( BPP(image->type) != 1 ) {
+ iclose(image);
+ PyErr_SetString(ImgfileError,
+ "Can't handle imgfiles with bpp!=1");
+ return NULL;
+ }
+ xsize = image->xsize;
+ ysize = image->ysize;
+ zsize = image->zsize;
+ if ( zsize != 1 && zsize != 3) {
+ iclose(image);
+ PyErr_SetString(ImgfileError,
+ "Can only handle 1 or 3 byte pixels");
+ return NULL;
+ }
+ if ( xsize > 8192 ) {
+ iclose(image);
+ PyErr_SetString(ImgfileError,
+ "Can't handle image with > 8192 columns");
+ return NULL;
+ }
+
+ if ( zsize == 3 ) zsize = 4;
+ rv = PyString_FromStringAndSize((char *)NULL, xsize*ysize*zsize);
+ if ( rv == NULL ) {
+ iclose(image);
+ return NULL;
+ }
+ cdatap = PyString_AsString(rv);
+ idatap = (long *)cdatap;
+
+ if (top_to_bottom) {
+ yfirst = ysize-1;
+ ylast = -1;
+ ystep = -1;
+ } else {
+ yfirst = 0;
+ ylast = ysize;
+ ystep = 1;
+ }
+ for ( y=yfirst; y != ylast && !error_called; y += ystep ) {
+ if ( zsize == 1 ) {
+ getrow(image, rs, y, 0);
+ for(x=0; x<xsize; x++ )
+ *cdatap++ = rs[x];
+ } else {
+ getrow(image, rs, y, 0);
+ getrow(image, gs, y, 1);
+ getrow(image, bs, y, 2);
+ for(x=0; x<xsize; x++ )
+ *idatap++ = (rs[x] & 0xff) |
+ ((gs[x] & 0xff)<<8) |
+ ((bs[x] & 0xff)<<16);
+ }
+ }
+ iclose(image);
+ if ( error_called ) {
+ Py_DECREF(rv);
+ return NULL;
+ }
+ return rv;
+}
+
+static IMAGE *glob_image;
+static long *glob_datap;
+static int glob_width, glob_z, glob_ysize;
+
+static void
+xs_get(short *buf, int y)
+{
+ if (top_to_bottom)
+ getrow(glob_image, buf, (glob_ysize-1-y), glob_z);
+ else
+ getrow(glob_image, buf, y, glob_z);
+}
+
+static void
+xs_put_c(short *buf, int y)
+{
+ char *datap = (char *)glob_datap + y*glob_width;
+ int width = glob_width;
+
+ while ( width-- )
+ *datap++ = (*buf++) & 0xff;
+}
+
+static void
+xs_put_0(short *buf, int y)
+{
+ long *datap = glob_datap + y*glob_width;
+ int width = glob_width;
+
+ while ( width-- )
+ *datap++ = (*buf++) & 0xff;
+}
+static void
+xs_put_12(short *buf, int y)
+{
+ long *datap = glob_datap + y*glob_width;
+ int width = glob_width;
+
+ while ( width-- )
+ *datap++ |= ((*buf++) & 0xff) << (glob_z*8);
+}
+
+static void
+xscale(IMAGE *image, int xsize, int ysize, int zsize,
+ long *datap, int xnew, int ynew, int fmode, double blur)
+{
+ glob_image = image;
+ glob_datap = datap;
+ glob_width = xnew;
+ glob_ysize = ysize;
+ if ( zsize == 1 ) {
+ glob_z = 0;
+ filterzoom(xs_get, xs_put_c, xsize, ysize,
+ xnew, ynew, fmode, blur);
+ } else {
+ glob_z = 0;
+ filterzoom(xs_get, xs_put_0, xsize, ysize,
+ xnew, ynew, fmode, blur);
+ glob_z = 1;
+ filterzoom(xs_get, xs_put_12, xsize, ysize,
+ xnew, ynew, fmode, blur);
+ glob_z = 2;
+ filterzoom(xs_get, xs_put_12, xsize, ysize,
+ xnew, ynew, fmode, blur);
+ }
+}
+
+
+static PyObject *
+imgfile_readscaled(PyObject *self, PyObject *args)
+{
+ char *fname;
+ PyObject *rv;
+ int xsize, ysize, zsize;
+ char *cdatap;
+ long *idatap;
+ static short rs[8192], gs[8192], bs[8192];
+ int x, y;
+ int xwtd, ywtd, xorig, yorig;
+ float xfac, yfac;
+ IMAGE *image;
+ char *filter;
+ double blur = 1.0;
+ int extended;
+ int fmode = 0;
+ int yfirst, ylast, ystep;
+
+ /*
+ ** Parse args. Funny, since arg 4 and 5 are optional
+ ** (filter name and blur factor). Also, 4 or 5 arguments indicates
+ ** extended scale algorithm in stead of simple-minded pixel drop/dup.
+ */
+ extended = PyTuple_Size(args) >= 4;
+ if ( !PyArg_ParseTuple(args, "sii|sd",
+ &fname, &xwtd, &ywtd, &filter, &blur) )
+ return NULL;
+
+ /*
+ ** Check parameters, open file and check type, rows, etc.
+ */
+ if ( extended ) {
+ if ( strcmp(filter, "impulse") == 0 )
+ fmode = IMPULSE;
+ else if ( strcmp( filter, "box") == 0 )
+ fmode = BOX;
+ else if ( strcmp( filter, "triangle") == 0 )
+ fmode = TRIANGLE;
+ else if ( strcmp( filter, "quadratic") == 0 )
+ fmode = QUADRATIC;
+ else if ( strcmp( filter, "gaussian") == 0 )
+ fmode = GAUSSIAN;
+ else {
+ PyErr_SetString(ImgfileError, "Unknown filter type");
+ return NULL;
+ }
+ }
+
+ if ( (image = imgfile_open(fname)) == NULL )
+ return NULL;
+
+ if ( image->colormap != CM_NORMAL ) {
+ iclose(image);
+ PyErr_SetString(ImgfileError,
+ "Can only handle CM_NORMAL images");
+ return NULL;
+ }
+ if ( BPP(image->type) != 1 ) {
+ iclose(image);
+ PyErr_SetString(ImgfileError,
+ "Can't handle imgfiles with bpp!=1");
+ return NULL;
+ }
+ xsize = image->xsize;
+ ysize = image->ysize;
+ zsize = image->zsize;
+ if ( zsize != 1 && zsize != 3) {
+ iclose(image);
+ PyErr_SetString(ImgfileError,
+ "Can only handle 1 or 3 byte pixels");
+ return NULL;
+ }
+ if ( xsize > 8192 ) {
+ iclose(image);
+ PyErr_SetString(ImgfileError,
+ "Can't handle image with > 8192 columns");
+ return NULL;
+ }
+
+ if ( zsize == 3 ) zsize = 4;
+ rv = PyString_FromStringAndSize(NULL, xwtd*ywtd*zsize);
+ if ( rv == NULL ) {
+ iclose(image);
+ return NULL;
+ }
+ PyFPE_START_PROTECT("readscaled", return 0)
+ xfac = (float)xsize/(float)xwtd;
+ yfac = (float)ysize/(float)ywtd;
+ PyFPE_END_PROTECT(yfac)
+ cdatap = PyString_AsString(rv);
+ idatap = (long *)cdatap;
+
+ if ( extended ) {
+ xscale(image, xsize, ysize, zsize,
+ idatap, xwtd, ywtd, fmode, blur);
+ } else {
+ if (top_to_bottom) {
+ yfirst = ywtd-1;
+ ylast = -1;
+ ystep = -1;
+ } else {
+ yfirst = 0;
+ ylast = ywtd;
+ ystep = 1;
+ }
+ for ( y=yfirst; y != ylast && !error_called; y += ystep ) {
+ yorig = (int)(y*yfac);
+ if ( zsize == 1 ) {
+ getrow(image, rs, yorig, 0);
+ for(x=0; x<xwtd; x++ ) {
+ *cdatap++ = rs[(int)(x*xfac)];
+ }
+ } else {
+ getrow(image, rs, yorig, 0);
+ getrow(image, gs, yorig, 1);
+ getrow(image, bs, yorig, 2);
+ for(x=0; x<xwtd; x++ ) {
+ xorig = (int)(x*xfac);
+ *idatap++ = (rs[xorig] & 0xff) |
+ ((gs[xorig] & 0xff)<<8) |
+ ((bs[xorig] & 0xff)<<16);
+ }
+ }
+ }
+ }
+ iclose(image);
+ if ( error_called ) {
+ Py_DECREF(rv);
+ return NULL;
+ }
+ return rv;
+}
+
+static PyObject *
+imgfile_getsizes(PyObject *self, PyObject *args)
+{
+ char *fname;
+ PyObject *rv;
+ IMAGE *image;
+
+ if ( !PyArg_ParseTuple(args, "s:getsizes", &fname) )
+ return NULL;
+
+ if ( (image = imgfile_open(fname)) == NULL )
+ return NULL;
+ rv = Py_BuildValue("(iii)", image->xsize, image->ysize, image->zsize);
+ iclose(image);
+ return rv;
+}
+
+static PyObject *
+imgfile_write(PyObject *self, PyObject *args)
+{
+ IMAGE *image;
+ char *fname;
+ int xsize, ysize, zsize, len;
+ char *cdatap;
+ long *idatap;
+ short rs[8192], gs[8192], bs[8192];
+ short r, g, b;
+ long rgb;
+ int x, y;
+ int yfirst, ylast, ystep;
+
+
+ if ( !PyArg_ParseTuple(args, "ss#iii:write",
+ &fname, &cdatap, &len, &xsize, &ysize, &zsize) )
+ return NULL;
+
+ if ( zsize != 1 && zsize != 3 ) {
+ PyErr_SetString(ImgfileError,
+ "Can only handle 1 or 3 byte pixels");
+ return NULL;
+ }
+ if ( len != xsize * ysize * (zsize == 1 ? 1 : 4) ) {
+ PyErr_SetString(ImgfileError, "Data does not match sizes");
+ return NULL;
+ }
+ if ( xsize > 8192 ) {
+ PyErr_SetString(ImgfileError,
+ "Can't handle image with > 8192 columns");
+ return NULL;
+ }
+
+ error_called = 0;
+ errno = 0;
+ image =iopen(fname, "w", RLE(1), 3, xsize, ysize, zsize);
+ if ( image == 0 ) {
+ if ( ! error_called ) {
+ if (errno)
+ PyErr_SetFromErrno(ImgfileError);
+ else
+ PyErr_SetString(ImgfileError,
+ "Can't create image file");
+ }
+ return NULL;
+ }
+
+ idatap = (long *)cdatap;
+
+ if (top_to_bottom) {
+ yfirst = ysize-1;
+ ylast = -1;
+ ystep = -1;
+ } else {
+ yfirst = 0;
+ ylast = ysize;
+ ystep = 1;
+ }
+ for ( y=yfirst; y != ylast && !error_called; y += ystep ) {
+ if ( zsize == 1 ) {
+ for( x=0; x<xsize; x++ )
+ rs[x] = *cdatap++;
+ putrow(image, rs, y, 0);
+ } else {
+ for( x=0; x<xsize; x++ ) {
+ rgb = *idatap++;
+ r = rgb & 0xff;
+ g = (rgb >> 8 ) & 0xff;
+ b = (rgb >> 16 ) & 0xff;
+ rs[x] = r;
+ gs[x] = g;
+ bs[x] = b;
+ }
+ putrow(image, rs, y, 0);
+ putrow(image, gs, y, 1);
+ putrow(image, bs, y, 2);
+ }
+ }
+ iclose(image);
+ if ( error_called )
+ return NULL;
+ Py_INCREF(Py_None);
+ return Py_None;
+
+}
+
+
+static PyMethodDef imgfile_methods[] = {
+ { "getsizes", imgfile_getsizes, METH_VARARGS },
+ { "read", imgfile_read, METH_VARARGS },
+ { "readscaled", imgfile_readscaled, METH_VARARGS},
+ { "write", imgfile_write, METH_VARARGS },
+ { "ttob", imgfile_ttob, METH_VARARGS },
+ { NULL, NULL } /* Sentinel */
+};
+
+
+void
+initimgfile(void)
+{
+ PyObject *m, *d;
+
+ if (PyErr_WarnPy3k("the imgfile module has been removed in "
+ "Python 3.0", 2) < 0)
+ return;
+
+ m = Py_InitModule("imgfile", imgfile_methods);
+ if (m == NULL)
+ return;
+ d = PyModule_GetDict(m);
+ ImgfileError = PyErr_NewException("imgfile.error", NULL, NULL);
+ if (ImgfileError != NULL)
+ PyDict_SetItemString(d, "error", ImgfileError);
+}
+
+
+