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/*
* MapViewCache.cpp, part of VCMI engine
*
* Authors: listed in file AUTHORS in main folder
*
* License: GNU General Public License v2.0 or later
* Full text of license available in license.txt file, in main folder
*
*/
#include "StdInc.h"
#include "MapViewCache.h"
#include "IMapRendererContext.h"
#include "MapRenderer.h"
#include "MapViewModel.h"
#include "../render/CAnimation.h"
#include "../render/Canvas.h"
#include "../render/IImage.h"
#include "../render/IFont.h"
#include "../render/IRenderHandler.h"
#include "../render/Graphics.h"
#include "../gui/CGuiHandler.h"
#include "../widgets/TextControls.h"
#include "../../lib/mapObjects/CObjectHandler.h"
#include "../../lib/int3.h"
MapViewCache::~MapViewCache() = default;
MapViewCache::MapViewCache(const std::shared_ptr<MapViewModel> & model)
: model(model)
, cachedLevel(0)
, overlayWasVisible(false)
, mapRenderer(new MapRenderer())
, iconsStorage(GH.renderHandler().loadAnimation(AnimationPath::builtin("VwSymbol"), EImageBlitMode::COLORKEY))
, intermediate(new Canvas(Point(32, 32), CanvasScalingPolicy::AUTO))
, terrain(new Canvas(model->getCacheDimensionsPixels(), CanvasScalingPolicy::AUTO))
, terrainTransition(new Canvas(model->getPixelsVisibleDimensions(), CanvasScalingPolicy::AUTO))
{
Point visibleSize = model->getTilesVisibleDimensions();
terrainChecksum.resize(boost::extents[visibleSize.x][visibleSize.y]);
tilesUpToDate.resize(boost::extents[visibleSize.x][visibleSize.y]);
}
Canvas MapViewCache::getTile(const int3 & coordinates)
{
return Canvas(*terrain, model->getCacheTileArea(coordinates));
}
std::shared_ptr<IImage> MapViewCache::getOverlayImageForTile(const std::shared_ptr<IMapRendererContext> & context, const int3 & coordinates)
{
size_t imageIndex = context->overlayImageIndex(coordinates);
if(imageIndex < iconsStorage->size())
return iconsStorage->getImage(imageIndex);
return nullptr;
}
void MapViewCache::invalidate(const std::shared_ptr<IMapRendererContext> & context, const ObjectInstanceID & object)
{
for(size_t cacheY = 0; cacheY < terrainChecksum.shape()[1]; ++cacheY)
{
for(size_t cacheX = 0; cacheX < terrainChecksum.shape()[0]; ++cacheX)
{
auto & entry = terrainChecksum[cacheX][cacheY];
int3 tile(entry.tileX, entry.tileY, cachedLevel);
if(context->isInMap(tile) && vstd::contains(context->getObjects(tile), object))
entry = TileChecksum{};
}
}
}
void MapViewCache::updateTile(const std::shared_ptr<IMapRendererContext> & context, const int3 & coordinates)
{
int cacheX = (terrainChecksum.shape()[0] + coordinates.x) % terrainChecksum.shape()[0];
int cacheY = (terrainChecksum.shape()[1] + coordinates.y) % terrainChecksum.shape()[1];
auto & oldCacheEntry = terrainChecksum[cacheX][cacheY];
TileChecksum newCacheEntry;
newCacheEntry.tileX = coordinates.x;
newCacheEntry.tileY = coordinates.y;
newCacheEntry.checksum = mapRenderer->getTileChecksum(*context, coordinates);
if(cachedLevel == coordinates.z && oldCacheEntry == newCacheEntry && !context->tileAnimated(coordinates))
return;
Canvas target = getTile(coordinates);
if(model->getSingleTileSize() == Point(32, 32))
{
mapRenderer->renderTile(*context, target, coordinates);
}
else
{
mapRenderer->renderTile(*context, *intermediate, coordinates);
target.drawScaled(*intermediate, Point(0, 0), model->getSingleTileSize());
}
if(context->filterGrayscale())
target.applyGrayscale();
oldCacheEntry = newCacheEntry;
tilesUpToDate[cacheX][cacheY] = false;
}
void MapViewCache::update(const std::shared_ptr<IMapRendererContext> & context)
{
Rect dimensions = model->getTilesTotalRect();
bool mapResized = cachedSize != model->getSingleTileSize();
if(mapResized || dimensions.w != terrainChecksum.shape()[0] || dimensions.h != terrainChecksum.shape()[1])
{
boost::multi_array<TileChecksum, 2> newCache;
newCache.resize(boost::extents[dimensions.w][dimensions.h]);
terrainChecksum.resize(boost::extents[dimensions.w][dimensions.h]);
terrainChecksum = newCache;
}
if(mapResized || dimensions.w != tilesUpToDate.shape()[0] || dimensions.h != tilesUpToDate.shape()[1])
{
boost::multi_array<bool, 2> newCache;
newCache.resize(boost::extents[dimensions.w][dimensions.h]);
tilesUpToDate.resize(boost::extents[dimensions.w][dimensions.h]);
tilesUpToDate = newCache;
}
for(int y = dimensions.top(); y < dimensions.bottom(); ++y)
for(int x = dimensions.left(); x < dimensions.right(); ++x)
updateTile(context, {x, y, model->getLevel()});
cachedSize = model->getSingleTileSize();
cachedLevel = model->getLevel();
}
void MapViewCache::render(const std::shared_ptr<IMapRendererContext> & context, Canvas & target, bool fullRedraw)
{
bool mapMoved = (cachedPosition != model->getMapViewCenter());
bool overlayVisible = context->showImageOverlay() || context->showTextOverlay();
bool overlayVisibilityChanged = overlayVisible != overlayWasVisible;
bool lazyUpdate = !overlayVisibilityChanged && !mapMoved && !fullRedraw && vstd::isAlmostZero(context->viewTransitionProgress());
Rect dimensions = model->getTilesTotalRect();
for(int y = dimensions.top(); y < dimensions.bottom(); ++y)
{
for(int x = dimensions.left(); x < dimensions.right(); ++x)
{
int cacheX = (terrainChecksum.shape()[0] + x) % terrainChecksum.shape()[0];
int cacheY = (terrainChecksum.shape()[1] + y) % terrainChecksum.shape()[1];
int3 tile(x, y, model->getLevel());
if(lazyUpdate && tilesUpToDate[cacheX][cacheY])
continue;
Canvas source = getTile(tile);
Rect targetRect = model->getTargetTileArea(tile);
target.draw(source, targetRect.topLeft());
if (!fullRedraw)
tilesUpToDate[cacheX][cacheY] = true;
}
}
if(context->showImageOverlay())
{
for(int y = dimensions.top(); y < dimensions.bottom(); ++y)
{
for(int x = dimensions.left(); x < dimensions.right(); ++x)
{
int3 tile(x, y, model->getLevel());
auto overlay = getOverlayImageForTile(context, tile);
if(overlay)
{
Rect targetRect = model->getTargetTileArea(tile);
Point position = targetRect.center() - overlay->dimensions() / 2;
target.draw(overlay, position);
}
}
}
}
if(context->showTextOverlay())
{
const auto & font = GH.renderHandler().loadFont(FONT_TINY);
for(int y = dimensions.top(); y < dimensions.bottom(); ++y)
{
for(int x = dimensions.left(); x < dimensions.right(); ++x)
{
int3 tile(x, y, model->getLevel());
auto overlay = context->overlayText(tile);
if(!overlay.empty())
{
Rect targetRect = model->getTargetTileArea(tile);
Point position = targetRect.center();
if (x % 2 == 0)
position.y += targetRect.h / 4;
else
position.y -= targetRect.h / 4;
Point dimensions(font->getStringWidth(overlay), font->getLineHeight());
Rect textRect = Rect(position - dimensions / 2, dimensions).resize(2);
target.drawColor(textRect, context->overlayTextColor(tile));
target.drawBorder(textRect, Colors::BRIGHT_YELLOW);
target.drawText(position, EFonts::FONT_TINY, Colors::BLACK, ETextAlignment::CENTER, overlay);
}
}
}
}
if(!vstd::isAlmostZero(context->viewTransitionProgress()))
target.drawTransparent(*terrainTransition, Point(0, 0), 1.0 - context->viewTransitionProgress());
cachedPosition = model->getMapViewCenter();
overlayWasVisible = overlayVisible;
}
void MapViewCache::createTransitionSnapshot(const std::shared_ptr<IMapRendererContext> & context)
{
update(context);
render(context, *terrainTransition, true);
}
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