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