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7365c3aa77
This splits out the cogl_path_ api into a separate cogl-path sub-library
like cogl-pango and cogl-gst. This enables developers to build Cogl with
this sub-library disabled if they don't need it which can be useful when
its important to keep the size of an application and its dependencies
down to a minimum. The functions cogl_framebuffer_{fill,stroke}_path
have been renamed to cogl_path_{fill,stroke}.
There were a few places in core cogl and cogl-gst that referenced the
CoglPath api and these have been decoupled by using the CoglPrimitive
api instead. In the case of cogl_framebuffer_push_path_clip() the core
clip stack no longer accepts path clips directly but it's now possible
to get a CoglPrimitive for the fill of a path and so the implementation
of cogl_framebuffer_push_path_clip() now lives in cogl-path and works as
a shim that first gets a CoglPrimitive and uses
cogl_framebuffer_push_primitive_clip instead.
We may want to consider renaming cogl_framebuffer_push_path_clip to
put it in the cogl_path_ namespace.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 8aadfd829239534fb4ec8255cdea813d698c5a3f)
So as to avoid breaking the 1.x API or even the ABI since we are quite
late in the 1.16 development cycle the patch was modified to build
cogl-path as a noinst_LTLIBRARY before building cogl and link the code
directly into libcogl.so as it was previously. This way we can wait
until the start of the 1.18 cycle before splitting the code into a
separate libcogl-path.so.
This also adds shims for cogl_framebuffer_fill/stroke_path() to avoid
breaking the 1.x API/ABI.
120 lines
2.9 KiB
C
120 lines
2.9 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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#include "cogl-attribute-private.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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CoglContext *context;
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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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CoglAttributeBuffer *fill_attribute_buffer;
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CoglIndices *fill_vbo_indices;
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unsigned int fill_vbo_n_indices;
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CoglAttribute *fill_attributes[COGL_PATH_N_ATTRIBUTES + 1];
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CoglPrimitive *fill_primitive;
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CoglAttributeBuffer *stroke_attribute_buffer;
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CoglAttribute **stroke_attributes;
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unsigned int stroke_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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CoglBool 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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CoglBool merge,
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CoglBool 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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CoglBool
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_cogl_path_is_rectangle (CoglPath *path);
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#endif /* __COGL_PATH_PRIVATE_H */
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