122 lines
3.5 KiB
C++
122 lines
3.5 KiB
C++
/* Copyright 2015, Michele Santullo
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* This file is part of DoorKeeper.
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*
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* DoorKeeper is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* DoorKeeper is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with DoorKeeper. If not, see <http://www.gnu.org/licenses/>.
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*/
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namespace dk {
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template <uint32_t D>
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TileInfo<D>::TileInfo (const LayerBase<D>& parLayer) :
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tile_size(parLayer.tile_size()),
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map_size(parLayer.map_size())
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{
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}
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template <uint32_t D>
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bool TileInfo<D>::operator== (const TileInfo& parOther) const {
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return tile_size == parOther.tile_size and map_size == parOther.map_size;
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}
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template <uint32_t D>
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Viewport<D>::Viewport (Tyler<D>& parTyler, const TileInfo<D>* parTileInfo) :
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m_view(parTileInfo->map_size - 1),
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m_pixel_offset(0),
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m_tyler(&parTyler),
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m_tile_info(parTileInfo)
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{
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DK_ASSERT(parTileInfo);
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DK_ASSERT(m_tyler);
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}
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template <uint32_t D>
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Viewport<D>::Viewport (Tyler<D>& parTyler, const TileInfo<D>* parTileInfo, const coords& parPos) :
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m_view(parPos, parTileInfo->map_size - 1),
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m_pixel_offset(0),
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m_tyler(&parTyler),
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m_tile_info(parTileInfo)
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{
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DK_ASSERT(parTileInfo);
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DK_ASSERT(parPos < parPos + m_tile_info->map_size); //parSize > 0
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DK_ASSERT(m_tile_info->map_size + parPos <= m_tile_info->map_size);
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DK_ASSERT(m_tyler);
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m_tyler->preload(m_view.position(), m_view.position() + this->size());
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}
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template <uint32_t D>
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void Viewport<D>::setFrom (const coords& parFrom) {
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DK_ASSERT(this->size() + parFrom <= m_tile_info->map_size);
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m_view.set_position(parFrom);
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m_tyler->preload(m_view.position(), m_view.position() + this->size());
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}
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template <uint32_t D>
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typename Viewport<D>::coords Viewport<D>::size() const {
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return (m_view.upper() + 1);
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}
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template <uint32_t D>
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Viewport<D>& Viewport<D>::operator+= (const coords_f& parValue) {
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m_pixel_offset += parValue;
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clip_pixel_offset();
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return *this;
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}
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template <uint32_t D>
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Viewport<D>& Viewport<D>::operator-= (const coords_f& parValue) {
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m_pixel_offset -= parValue;
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clip_pixel_offset();
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return *this;
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}
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template <uint32_t D>
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void Viewport<D>::clip_pixel_offset() {
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const auto& tile_size = m_tile_info->tile_size;
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for (uint32_t z = 0; z < D; ++z) {
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auto offs = static_cast<CoordinateScalarType>(m_pixel_offset[z]);
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if (std::abs(offs) >= tile_size[z]) {
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auto curr_tile_size_f = static_cast<CoordinateAccumType>(tile_size[z]);
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if (offs < 0) {
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do {
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offs += tile_size[z];
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m_pixel_offset[z] += curr_tile_size_f;
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--m_view;
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} while(offs >= tile_size[z]);
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}
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else {
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DK_ASSERT(offs > 0);
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do {
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offs -= tile_size[z];
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m_pixel_offset[z] -= curr_tile_size_f;
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++m_view;
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} while(offs >= tile_size[z]);
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}
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}
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}
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}
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template <uint32_t D>
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auto Viewport<D>::pixel_offset() const -> coords {
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return static_cast<coords>(m_pixel_offset);
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}
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template <uint32_t D>
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auto Viewport<D>::upper() const -> const coords& {
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return m_view.upper();
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}
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template <uint32_t D>
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auto Viewport<D>::block_position() const -> const coords& {
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return m_view.position();
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}
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} //namespace dk
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