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+// Filename: fadeImagePool.cxx
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+// Created by: drose (30Jul01)
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+//
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+////////////////////////////////////////////////////////////////////
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+//
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+// PANDA 3D SOFTWARE
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+// Copyright (c) 2001, Disney Enterprises, Inc. All rights reserved
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+//
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+// All use of this software is subject to the terms of the Panda 3d
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+// Software license. You should have received a copy of this license
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+// along with this source code; you will also find a current copy of
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+// the license at http://www.panda3d.org/license.txt .
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+//
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+// To contact the maintainers of this program write to
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+// [email protected] .
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+//
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+////////////////////////////////////////////////////////////////////
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+
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+#include "fadeImagePool.h"
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+#include "pnmImage.h"
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+
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+FadeImagePool *FadeImagePool::_global_ptr = (FadeImagePool *)NULL;
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+
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+////////////////////////////////////////////////////////////////////
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+// Function: FadeImagePool::Constructor
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+// Access: Private
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+// Description: The constructor is never called explicitly; there is
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+// only one FadeImagePool and it constructs itself.
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+////////////////////////////////////////////////////////////////////
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+FadeImagePool::
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+FadeImagePool() {
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+}
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+
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+////////////////////////////////////////////////////////////////////
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+// Function: FadeImagePool::ns_get_image
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+// Access: Private
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+// Description: The nonstatic implementation of get_image(). This
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+// loads up the image if it is not already, scales it to
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+// the indicated size if it is not already, and returns
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+// it.
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+////////////////////////////////////////////////////////////////////
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+const PNMImage *FadeImagePool::
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+ns_get_image(const Filename &filename, int x_size, int y_size) {
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+ Images::iterator ii = _images.find(filename);
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+ if (ii == _images.end()) {
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+ // The image has not yet been loaded. Load it.
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+ cerr << "Reading fade image " << filename << "\n";
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+ PNMImage *image = new PNMImage(filename);
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+ if (!image->is_valid()) {
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+ cerr << "Unable to read fade image.\n";
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+ delete image;
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+ return (const PNMImage *)NULL;
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+ }
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+
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+ // Make sure it's a grayscale image. This will save a bit of time
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+ // later.
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+ image->set_color_type(PNMImage::CT_grayscale);
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+
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+ ii = _images.insert(Images::value_type(filename, ImageSizes())).first;
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+ (*ii).second.push_back(image);
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+ }
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+
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+ // Now see if we have a fade image of the requested size.
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+ ImageSizes &sizes = (*ii).second;
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+ ImageSizes::iterator si;
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+ for (si = sizes.begin(); si != sizes.end(); ++si) {
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+ PNMImage *image = (*si);
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+ if (image->get_x_size() == x_size && image->get_y_size() == y_size) {
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+ // Here's one that suits!
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+ return image;
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+ }
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+ }
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+
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+ // None of our images were of a suitable size, so make one.
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+ nassertr(!sizes.empty(), NULL);
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+
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+ PNMImage *orig_image = sizes.front();
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+ cerr << "Resizing fade image to " << x_size << " by " << y_size << "\n";
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+ PNMImage *resized_image =
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+ new PNMImage(x_size, y_size, PNMImage::CT_grayscale,
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+ orig_image->get_maxval());
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+ resized_image->quick_filter_from(*orig_image);
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+
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+ sizes.push_back(resized_image);
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+ return resized_image;
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+}
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+
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+////////////////////////////////////////////////////////////////////
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+// Function: FadeImagePool::get_ptr
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+// Access: Private, Static
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+// Description: Returns the global FadeImagePool pointer.
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+////////////////////////////////////////////////////////////////////
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+FadeImagePool *FadeImagePool::
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+get_ptr() {
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+ if (_global_ptr == (FadeImagePool *)NULL) {
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+ _global_ptr = new FadeImagePool;
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+ }
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+ return _global_ptr;
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+}
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+
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David Rose