81 lines
2.2 KiB
C
81 lines
2.2 KiB
C
/*
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* Cogl
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*
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* A Low Level GPU Graphics and Utilities API
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*
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* Copyright (C) 2007,2008,2009 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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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-object-private.h"
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#include "cogl-pipeline-layer-state.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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const CoglSpan *spans;
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int n_spans;
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const 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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CoglBool intersects;
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CoglBool flipped;
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CoglPipelineWrapMode wrap_mode;
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int mirror_direction;
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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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const CoglSpan *spans,
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int n_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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CoglPipelineWrapMode wrap_mode);
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void
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_cogl_span_iter_next (CoglSpanIter *iter);
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CoglBool
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_cogl_span_iter_end (CoglSpanIter *iter);
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#endif /* __COGL_SPANS_PRIVATE_H */
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