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- /*
- Copyright (C) 2015 Aaron Suen <warr1024@gmail.com>
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser 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.
- */
- #include "guiscalingfilter.h"
- #include "imagefilters.h"
- #include "settings.h"
- #include "util/numeric.h"
- #include <cstdio>
- #include "client/renderingengine.h"
- /* Maintain a static cache to store the images that correspond to textures
- * in a format that's manipulable by code. Some platforms exhibit issues
- * converting textures back into images repeatedly, and some don't even
- * allow it at all.
- */
- std::map<io::path, video::IImage *> g_imgCache;
- /* Maintain a static cache of all pre-scaled textures. These need to be
- * cleared as well when the cached images.
- */
- std::map<io::path, video::ITexture *> g_txrCache;
- /* Manually insert an image into the cache, useful to avoid texture-to-image
- * conversion whenever we can intercept it.
- */
- void guiScalingCache(io::path key, video::IVideoDriver *driver, video::IImage *value)
- {
- if (!g_settings->getBool("gui_scaling_filter"))
- return;
- video::IImage *copied = driver->createImage(value->getColorFormat(),
- value->getDimension());
- value->copyTo(copied);
- g_imgCache[key] = copied;
- }
- // Manually clear the cache, e.g. when switching to different worlds.
- void guiScalingCacheClear()
- {
- for (auto &it : g_imgCache) {
- if (it.second)
- it.second->drop();
- }
- g_imgCache.clear();
- for (auto &it : g_txrCache) {
- if (it.second)
- RenderingEngine::get_video_driver()->removeTexture(it.second);
- }
- g_txrCache.clear();
- }
- /* Get a cached, high-quality pre-scaled texture for display purposes. If the
- * texture is not already cached, attempt to create it. Returns a pre-scaled texture,
- * or the original texture if unable to pre-scale it.
- */
- video::ITexture *guiScalingResizeCached(video::IVideoDriver *driver,
- video::ITexture *src, const core::rect<s32> &srcrect,
- const core::rect<s32> &destrect)
- {
- if (src == NULL)
- return src;
- if (!g_settings->getBool("gui_scaling_filter"))
- return src;
- // Calculate scaled texture name.
- char rectstr[200];
- snprintf(rectstr, sizeof(rectstr), "%d:%d:%d:%d:%d:%d",
- srcrect.UpperLeftCorner.X,
- srcrect.UpperLeftCorner.Y,
- srcrect.getWidth(),
- srcrect.getHeight(),
- destrect.getWidth(),
- destrect.getHeight());
- io::path origname = src->getName().getPath();
- io::path scalename = origname + "@guiScalingFilter:" + rectstr;
- // Search for existing scaled texture.
- video::ITexture *scaled = g_txrCache[scalename];
- if (scaled)
- return scaled;
- // Try to find the texture converted to an image in the cache.
- // If the image was not found, try to extract it from the texture.
- video::IImage* srcimg = g_imgCache[origname];
- if (srcimg == NULL) {
- if (!g_settings->getBool("gui_scaling_filter_txr2img"))
- return src;
- srcimg = driver->createImageFromData(src->getColorFormat(),
- src->getSize(), src->lock(), false);
- src->unlock();
- g_imgCache[origname] = srcimg;
- }
- // Create a new destination image and scale the source into it.
- imageCleanTransparent(srcimg, 0);
- video::IImage *destimg = driver->createImage(src->getColorFormat(),
- core::dimension2d<u32>((u32)destrect.getWidth(),
- (u32)destrect.getHeight()));
- imageScaleNNAA(srcimg, srcrect, destimg);
- #ifdef __ANDROID__
- // Android is very picky about textures being powers of 2, so expand
- // the image dimensions to the next power of 2, if necessary, for
- // that platform.
- video::IImage *po2img = driver->createImage(src->getColorFormat(),
- core::dimension2d<u32>(npot2((u32)destrect.getWidth()),
- npot2((u32)destrect.getHeight())));
- po2img->fill(video::SColor(0, 0, 0, 0));
- destimg->copyTo(po2img);
- destimg->drop();
- destimg = po2img;
- #endif
- // Convert the scaled image back into a texture.
- scaled = driver->addTexture(scalename, destimg, NULL);
- destimg->drop();
- g_txrCache[scalename] = scaled;
- return scaled;
- }
- /* Convenience wrapper for guiScalingResizeCached that accepts parameters that
- * are available at GUI imagebutton creation time.
- */
- video::ITexture *guiScalingImageButton(video::IVideoDriver *driver,
- video::ITexture *src, s32 width, s32 height)
- {
- if (src == NULL)
- return src;
- return guiScalingResizeCached(driver, src,
- core::rect<s32>(0, 0, src->getSize().Width, src->getSize().Height),
- core::rect<s32>(0, 0, width, height));
- }
- /* Replacement for driver->draw2DImage() that uses the high-quality pre-scaled
- * texture, if configured.
- */
- void draw2DImageFilterScaled(video::IVideoDriver *driver, video::ITexture *txr,
- const core::rect<s32> &destrect, const core::rect<s32> &srcrect,
- const core::rect<s32> *cliprect, const video::SColor *const colors,
- bool usealpha)
- {
- // Attempt to pre-scale image in software in high quality.
- video::ITexture *scaled = guiScalingResizeCached(driver, txr, srcrect, destrect);
- if (scaled == NULL)
- return;
- // Correct source rect based on scaled image.
- const core::rect<s32> mysrcrect = (scaled != txr)
- ? core::rect<s32>(0, 0, destrect.getWidth(), destrect.getHeight())
- : srcrect;
- driver->draw2DImage(scaled, destrect, mysrcrect, cliprect, colors, usealpha);
- }
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