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c11036cd13
Instead of using integers to represent spans we now use floats instead. This means we are no longer forced to iterate using non-normalized coordinates so we should hopefully be able to avoid numerous redundant unnormalize/normalize steps when using the spans api. Reviewed-by: Neil Roberts <neil@linux.intel.com>
69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2007,2008,2009 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#ifndef __COGL_SPANS_PRIVATE_H
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#define __COGL_SPANS_PRIVATE_H
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#include "cogl-handle.h"
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typedef struct _CoglSpan
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{
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float start;
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float size;
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float waste;
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} CoglSpan;
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typedef struct _CoglSpanIter
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{
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int index;
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GArray *array;
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CoglSpan *span;
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float pos;
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float next_pos;
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float origin;
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float cover_start;
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float cover_end;
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float intersect_start;
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float intersect_end;
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gboolean intersects;
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gboolean flipped;
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} CoglSpanIter;
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void
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_cogl_span_iter_update (CoglSpanIter *iter);
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void
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_cogl_span_iter_begin (CoglSpanIter *iter,
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GArray *spans,
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float normalize_factor,
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float cover_start,
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float cover_end);
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void
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_cogl_span_iter_next (CoglSpanIter *iter);
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gboolean
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_cogl_span_iter_end (CoglSpanIter *iter);
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#endif /* __COGL_SPANS_PRIVATE_H */
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