91 lines
2.5 KiB
C++
91 lines
2.5 KiB
C++
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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#include "tilebuffer.hxx"
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static const int DPI = 96;
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static float pixelToTwip(float fInput, float zoom)
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{
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return (fInput / DPI / zoom) * 1440.0f;
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}
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static float twipToPixel(float fInput, float zoom)
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{
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return fInput / 1440.0f * DPI * zoom;
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}
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GdkPixbuf* Tile::tile_get_buffer()
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{
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return m_pBuffer;
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}
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void Tile::tile_release()
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{
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gdk_pixbuf_unref(m_pBuffer);
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m_pBuffer = NULL;
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}
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void TileBuffer::tile_buffer_set_zoom(float newZoomFactor, int rows, int columns)
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{
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m_fZoomFactor = newZoomFactor;
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tile_buffer_reset_all_tiles();
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// set new buffer width and height
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m_nWidth = columns;
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m_nHeight = rows;
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m_aTiles.resize(m_nWidth * m_nHeight);
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}
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void TileBuffer::tile_buffer_reset_all_tiles()
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{
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for (size_t i = 0; i < m_aTiles.size(); i++)
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{
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m_aTiles[i].tile_release();
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}
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m_aTiles.clear();
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}
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Tile& TileBuffer::tile_buffer_get_tile(int x, int y)
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{
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int index = x * m_nWidth + y;
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if(!m_aTiles[index].valid)
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{
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GdkPixbuf* pPixBuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, TRUE, 8, m_nTileSize, m_nTileSize);
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if (!pPixBuf){
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g_info ("error allocating memory to pixbuf");
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}
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unsigned char* pBuffer = gdk_pixbuf_get_pixels(pPixBuf);
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GdkRectangle aTileRectangle;
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aTileRectangle.x = pixelToTwip(m_nTileSize, m_fZoomFactor) * y;
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aTileRectangle.y = pixelToTwip(m_nTileSize, m_fZoomFactor) * x;
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g_info ("rendering (%d %d)", x, y);
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m_pLOKDocument->pClass->paintTile(m_pLOKDocument,
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// Buffer and its size, depends on the position only.
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pBuffer,
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m_nTileSize, m_nTileSize,
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// Position of the tile.
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aTileRectangle.x, aTileRectangle.y,
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// Size of the tile, depends on the zoom factor and the tile position only.
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pixelToTwip(m_nTileSize, m_fZoomFactor), pixelToTwip(m_nTileSize, m_fZoomFactor));
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m_aTiles[index].tile_set_pixbuf(pPixBuf);
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m_aTiles[index].valid = 1;
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}
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return m_aTiles[index];
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}
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void Tile::tile_set_pixbuf(GdkPixbuf *buffer)
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{
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m_pBuffer = buffer;
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}
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