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/* EINA - EFL data type library
* Copyright (C) 2002-2009 Rafael Antognolli
*
* This library 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 library 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 library;
* if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef EINA_TILER_INLINE_H_
#define EINA_TILER_INLINE_H_
#include "eina_safety_checks.h"
/**
* @cond LOCAL
* This struct should not be accessed directly, it is used by
* eina_tile_grid_slicer functions to maintain context and fill "info"
* member with correct values for given iteration.
*/
struct _Eina_Tile_Grid_Slicer
{
unsigned long col1, col2, row1, row2; // initial and final col,row
int tile_w, tile_h; // tile width, height
int x_rel, y_rel; // starting x,y coordinates of the first col,row
int w1_rel, h1_rel; // width,height of the first col,row
int w2_rel, h2_rel; // width,height of the last col,row
struct Eina_Tile_Grid_Info info; // info about the current tile
Eina_Bool first;
};
/**
* @endcond
*/
static inline Eina_Bool
eina_tile_grid_slicer_next(Eina_Tile_Grid_Slicer *slc, const Eina_Tile_Grid_Info **rect)
{
EINA_SAFETY_ON_NULL_RETURN_VAL(slc, 0);
if (slc->first)
{
slc->first = 0;
*rect = &slc->info;
return EINA_TRUE;
}
slc->info.col++;
if (slc->info.col > slc->col2)
{
slc->info.row++;
if (slc->info.row > slc->row2)
return EINA_FALSE;
else if (slc->info.row < slc->row2)
slc->info.rect.h = slc->tile_h;
else
slc->info.rect.h = slc->h2_rel;
slc->info.rect.y = 0;
slc->info.col = slc->col1;
slc->info.rect.x = slc->x_rel;
slc->info.rect.w = slc->w1_rel;
}
else
{
slc->info.rect.x = 0;
if (slc->info.col < slc->col2)
slc->info.rect.w = slc->tile_w;
else
slc->info.rect.w = slc->w2_rel;
}
if (slc->info.rect.w == slc->tile_w && slc->info.rect.h == slc->tile_h)
slc->info.full = EINA_TRUE;
else
slc->info.full = EINA_FALSE;
*rect = &slc->info;
return EINA_TRUE;
}
static inline Eina_Bool
eina_tile_grid_slicer_setup(Eina_Tile_Grid_Slicer *slc, int x, int y, int w, int h, int tile_w, int tile_h)
{
int tx1, tx2, ty1, ty2;
EINA_SAFETY_ON_NULL_RETURN_VAL(slc, 0);
tx1 = x;
ty1 = y;
tx2 = x + w - 1;
ty2 = y + h - 1;
if (x < 0 || y < 0 || w <= 0 || h <= 0 || tile_w <= 0 || tile_h <= 0)
{
slc->first = 0;
slc->col1 = slc->row1 = 0;
slc->col2 = slc->row2 = 0;
slc->info.col = slc->col1;
slc->info.row = slc->row1;
return EINA_TRUE;
}
slc->col1 = tx1 / tile_w;
slc->row1 = ty1 / tile_h;
slc->col2 = (tx2 - 0) / tile_w;
slc->row2 = (ty2 - 0) / tile_h;
slc->x_rel = tx1 % tile_w;
slc->y_rel = ty1 % tile_h;
slc->w1_rel = tile_w - slc->x_rel;
slc->h1_rel = tile_h - slc->y_rel;
slc->w2_rel = tx2 % tile_w + 1;
slc->h2_rel = ty2 % tile_h + 1;
slc->tile_w = tile_w;
slc->tile_h = tile_h;
slc->first = 1;
slc->info.col = slc->col1;
slc->info.row = slc->row1;
slc->info.rect.x = slc->x_rel;
slc->info.rect.y = slc->y_rel;
if (slc->info.col == slc->col2)
slc->w1_rel = slc->w2_rel - slc->x_rel;
if (slc->info.row == slc->row2)
slc->h1_rel = slc->h2_rel - slc->y_rel;
slc->info.rect.w = slc->w1_rel;
slc->info.rect.h = slc->h1_rel;
if (slc->info.rect.w == slc->tile_w && slc->info.rect.h == slc->tile_h)
slc->info.full = EINA_TRUE;
else
slc->info.full = EINA_FALSE;
return EINA_TRUE;
}
#endif
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