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cbe9d758d5
Drawing and clipping to paths is generally quite expensive because the geometry has to be tessellated into triangles in a single VBO which breaks up the journal batching. If we can detect when the path contains just a single rectangle then we can instead divert to calling cogl_rectangle which will take advantage of the journal, or by pushing a rectangle clip which usually ends up just using the scissor. This patch adds a boolean to each path to mark when it is a rectangle. It gets cleared whenever a node is added or gets set to TRUE whenever cogl2_path_rectangle is called. This doesn't try to catch cases where a rectangle is composed by cogl_path_line_to and cogl_path_move_to commands.
116 lines
2.8 KiB
C
116 lines
2.8 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) 2010 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_PATH_PRIVATE_H
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#define __COGL_PATH_PRIVATE_H
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#include "cogl-object.h"
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typedef struct _floatVec2
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{
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float x;
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float y;
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} floatVec2;
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typedef struct _CoglPathNode
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{
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float x;
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float y;
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unsigned int path_size;
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} CoglPathNode;
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typedef struct _CoglBezQuad
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{
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floatVec2 p1;
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floatVec2 p2;
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floatVec2 p3;
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} CoglBezQuad;
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typedef struct _CoglBezCubic
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{
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floatVec2 p1;
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floatVec2 p2;
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floatVec2 p3;
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floatVec2 p4;
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} CoglBezCubic;
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typedef struct _CoglPathData CoglPathData;
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struct _CoglPath
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{
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CoglObject _parent;
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CoglPathData *data;
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};
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#define COGL_PATH_N_ATTRIBUTES 2
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struct _CoglPathData
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{
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unsigned int ref_count;
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CoglPathFillRule fill_rule;
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GArray *path_nodes;
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floatVec2 path_start;
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floatVec2 path_pen;
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unsigned int last_path;
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floatVec2 path_nodes_min;
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floatVec2 path_nodes_max;
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CoglVertexArray *fill_vbo;
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CoglIndices *fill_vbo_indices;
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unsigned int fill_vbo_n_indices;
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CoglAttribute *fill_vbo_attributes[COGL_PATH_N_ATTRIBUTES + 1];
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CoglVertexArray *stroke_vbo;
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CoglAttribute **stroke_vbo_attributes;
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unsigned int stroke_vbo_n_attributes;
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/* This is used as an optimisation for when the path contains a
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single contour specified using cogl2_path_rectangle. Cogl is more
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optimised to handle rectangles than paths so we can detect this
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case and divert to the journal or a rectangle clip. If it is TRUE
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then the entire path can be described by calling
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_cogl_path_get_bounds */
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gboolean is_rectangle;
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};
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void
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_cogl_add_path_to_stencil_buffer (CoglPath *path,
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gboolean merge,
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gboolean need_clear);
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void
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_cogl_path_get_bounds (CoglPath *path,
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float *min_x,
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float *min_y,
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float *max_x,
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float *max_y);
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gboolean
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_cogl_path_is_rectangle (CoglPath *path);
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#endif /* __COGL_PATH_PRIVATE_H */
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