mirror of
https://github.com/brl/mutter.git
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eb109e6cc0
Commit 3c1e83c7 changed uses of arrays of CoglAttributes to take a
length instead of being NULL terminated. In cogl_primitive_new it was
still adding the NULL terminator to the array it passes to
cogl_primitive_new_with_attributes but then it was also including this
terminator in the count so it would just segfault when it tries to ref
the NULL pointer. Also _cogl_primitive_new_with_attributes_unref was
still trying to detect the NULL terminator so it would also crash.
559 lines
18 KiB
C
559 lines
18 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
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* <http://www.gnu.org/licenses/>.
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*
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*
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*
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* Authors:
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* Robert Bragg <robert@linux.intel.com>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "cogl-object-private.h"
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#include "cogl-primitive.h"
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#include "cogl-primitive-private.h"
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#include "cogl-attribute-private.h"
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#include <stdarg.h>
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static void _cogl_primitive_free (CoglPrimitive *primitive);
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COGL_OBJECT_DEFINE (Primitive, primitive);
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CoglPrimitive *
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cogl_primitive_new_with_attributes (CoglVerticesMode mode,
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int n_vertices,
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CoglAttribute **attributes,
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int n_attributes)
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{
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CoglPrimitive *primitive = g_slice_new (CoglPrimitive);
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int i;
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primitive->mode = mode;
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primitive->first_vertex = 0;
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primitive->n_vertices = n_vertices;
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primitive->indices = NULL;
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primitive->attributes =
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g_array_new (TRUE, FALSE, sizeof (CoglAttribute *));
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primitive->immutable_ref = 0;
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for (i = 0; i < n_attributes; i++)
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{
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CoglAttribute *attribute = attributes[i];
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cogl_object_ref (attribute);
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g_return_val_if_fail (cogl_is_attribute (attribute), NULL);
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g_array_append_val (primitive->attributes, attribute);
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}
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return _cogl_primitive_object_new (primitive);
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}
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/* This is just an internal convenience wrapper around
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new_with_attributes that also unrefs the attributes. It is just
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used for the builtin struct constructors */
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static CoglPrimitive *
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_cogl_primitive_new_with_attributes_unref (CoglVerticesMode mode,
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int n_vertices,
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CoglAttribute **attributes,
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int n_attributes)
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{
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CoglPrimitive *primitive;
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int i;
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primitive = cogl_primitive_new_with_attributes (mode,
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n_vertices,
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attributes,
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n_attributes);
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for (i = 0; i < n_attributes; i++)
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cogl_object_unref (attributes[i]);
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return primitive;
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}
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CoglPrimitive *
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cogl_primitive_new (CoglVerticesMode mode,
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int n_vertices,
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...)
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{
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va_list ap;
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int n_attributes;
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CoglAttribute **attributes;
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int i;
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CoglAttribute *attribute;
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va_start (ap, n_vertices);
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for (n_attributes = 0; va_arg (ap, CoglAttribute *); n_attributes++)
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;
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va_end (ap);
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attributes = g_alloca (sizeof (CoglAttribute *) * n_attributes);
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va_start (ap, n_vertices);
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for (i = 0; (attribute = va_arg (ap, CoglAttribute *)); i++)
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attributes[i] = attribute;
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va_end (ap);
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return cogl_primitive_new_with_attributes (mode, n_vertices,
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attributes,
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i);
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}
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CoglPrimitive *
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cogl_primitive_new_p2 (CoglVerticesMode mode,
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int n_vertices,
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const CoglVertexP2 *data)
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{
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CoglAttributeBuffer *attribute_buffer =
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cogl_attribute_buffer_new (n_vertices * sizeof (CoglVertexP2), data);
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CoglAttribute *attributes[1];
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attributes[0] = cogl_attribute_new (attribute_buffer,
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"cogl_position_in",
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sizeof (CoglVertexP2),
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offsetof (CoglVertexP2, x),
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2,
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COGL_ATTRIBUTE_TYPE_FLOAT);
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cogl_object_unref (attribute_buffer);
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return _cogl_primitive_new_with_attributes_unref (mode, n_vertices,
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attributes,
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1);
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}
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CoglPrimitive *
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cogl_primitive_new_p3 (CoglVerticesMode mode,
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int n_vertices,
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const CoglVertexP3 *data)
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{
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CoglAttributeBuffer *attribute_buffer =
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cogl_attribute_buffer_new (n_vertices * sizeof (CoglVertexP3), data);
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CoglAttribute *attributes[1];
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attributes[0] = cogl_attribute_new (attribute_buffer,
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"cogl_position_in",
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sizeof (CoglVertexP3),
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offsetof (CoglVertexP3, x),
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3,
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COGL_ATTRIBUTE_TYPE_FLOAT);
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cogl_object_unref (attribute_buffer);
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return _cogl_primitive_new_with_attributes_unref (mode, n_vertices,
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attributes,
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1);
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}
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CoglPrimitive *
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cogl_primitive_new_p2c4 (CoglVerticesMode mode,
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int n_vertices,
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const CoglVertexP2C4 *data)
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{
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CoglAttributeBuffer *attribute_buffer =
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cogl_attribute_buffer_new (n_vertices * sizeof (CoglVertexP2C4), data);
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CoglAttribute *attributes[2];
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attributes[0] = cogl_attribute_new (attribute_buffer,
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"cogl_position_in",
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sizeof (CoglVertexP2C4),
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offsetof (CoglVertexP2C4, x),
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2,
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COGL_ATTRIBUTE_TYPE_FLOAT);
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attributes[1] = cogl_attribute_new (attribute_buffer,
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"cogl_color_in",
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sizeof (CoglVertexP2C4),
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offsetof (CoglVertexP2C4, r),
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4,
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COGL_ATTRIBUTE_TYPE_UNSIGNED_BYTE);
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cogl_object_unref (attribute_buffer);
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return _cogl_primitive_new_with_attributes_unref (mode, n_vertices,
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attributes,
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2);
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}
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CoglPrimitive *
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cogl_primitive_new_p3c4 (CoglVerticesMode mode,
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int n_vertices,
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const CoglVertexP3C4 *data)
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{
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CoglAttributeBuffer *attribute_buffer =
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cogl_attribute_buffer_new (n_vertices * sizeof (CoglVertexP3C4), data);
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CoglAttribute *attributes[2];
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attributes[0] = cogl_attribute_new (attribute_buffer,
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"cogl_position_in",
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sizeof (CoglVertexP3C4),
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offsetof (CoglVertexP3C4, x),
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3,
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COGL_ATTRIBUTE_TYPE_FLOAT);
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attributes[1] = cogl_attribute_new (attribute_buffer,
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"cogl_color_in",
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sizeof (CoglVertexP3C4),
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offsetof (CoglVertexP3C4, r),
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4,
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COGL_ATTRIBUTE_TYPE_UNSIGNED_BYTE);
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cogl_object_unref (attribute_buffer);
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return _cogl_primitive_new_with_attributes_unref (mode, n_vertices,
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attributes,
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2);
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}
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CoglPrimitive *
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cogl_primitive_new_p2t2 (CoglVerticesMode mode,
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int n_vertices,
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const CoglVertexP2T2 *data)
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{
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CoglAttributeBuffer *attribute_buffer =
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cogl_attribute_buffer_new (n_vertices * sizeof (CoglVertexP2T2), data);
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CoglAttribute *attributes[2];
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attributes[0] = cogl_attribute_new (attribute_buffer,
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"cogl_position_in",
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sizeof (CoglVertexP2T2),
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offsetof (CoglVertexP2T2, x),
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2,
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COGL_ATTRIBUTE_TYPE_FLOAT);
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attributes[1] = cogl_attribute_new (attribute_buffer,
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"cogl_tex_coord0_in",
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sizeof (CoglVertexP2T2),
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offsetof (CoglVertexP2T2, s),
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2,
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COGL_ATTRIBUTE_TYPE_FLOAT);
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cogl_object_unref (attribute_buffer);
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return _cogl_primitive_new_with_attributes_unref (mode, n_vertices,
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attributes,
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2);
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}
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CoglPrimitive *
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cogl_primitive_new_p3t2 (CoglVerticesMode mode,
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int n_vertices,
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const CoglVertexP3T2 *data)
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{
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CoglAttributeBuffer *attribute_buffer =
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cogl_attribute_buffer_new (n_vertices * sizeof (CoglVertexP3T2), data);
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CoglAttribute *attributes[2];
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attributes[0] = cogl_attribute_new (attribute_buffer,
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"cogl_position_in",
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sizeof (CoglVertexP3T2),
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offsetof (CoglVertexP3T2, x),
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3,
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COGL_ATTRIBUTE_TYPE_FLOAT);
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attributes[1] = cogl_attribute_new (attribute_buffer,
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"cogl_tex_coord0_in",
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sizeof (CoglVertexP3T2),
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offsetof (CoglVertexP3T2, s),
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2,
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COGL_ATTRIBUTE_TYPE_FLOAT);
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cogl_object_unref (attribute_buffer);
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return _cogl_primitive_new_with_attributes_unref (mode, n_vertices,
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attributes,
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2);
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}
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CoglPrimitive *
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cogl_primitive_new_p2t2c4 (CoglVerticesMode mode,
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int n_vertices,
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const CoglVertexP2T2C4 *data)
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{
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CoglAttributeBuffer *attribute_buffer =
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cogl_attribute_buffer_new (n_vertices * sizeof (CoglVertexP2T2C4), data);
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CoglAttribute *attributes[3];
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attributes[0] = cogl_attribute_new (attribute_buffer,
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"cogl_position_in",
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sizeof (CoglVertexP2T2C4),
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offsetof (CoglVertexP2T2C4, x),
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2,
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COGL_ATTRIBUTE_TYPE_FLOAT);
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attributes[1] = cogl_attribute_new (attribute_buffer,
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"cogl_tex_coord0_in",
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sizeof (CoglVertexP2T2C4),
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offsetof (CoglVertexP2T2C4, s),
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2,
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COGL_ATTRIBUTE_TYPE_FLOAT);
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attributes[2] = cogl_attribute_new (attribute_buffer,
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"cogl_color_in",
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sizeof (CoglVertexP2T2C4),
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offsetof (CoglVertexP2T2C4, r),
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4,
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COGL_ATTRIBUTE_TYPE_UNSIGNED_BYTE);
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cogl_object_unref (attribute_buffer);
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return _cogl_primitive_new_with_attributes_unref (mode, n_vertices,
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attributes,
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3);
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}
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CoglPrimitive *
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cogl_primitive_new_p3t2c4 (CoglVerticesMode mode,
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int n_vertices,
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const CoglVertexP3T2C4 *data)
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{
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CoglAttributeBuffer *attribute_buffer =
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cogl_attribute_buffer_new (n_vertices * sizeof (CoglVertexP3T2C4), data);
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CoglAttribute *attributes[3];
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attributes[0] = cogl_attribute_new (attribute_buffer,
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"cogl_position_in",
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sizeof (CoglVertexP3T2C4),
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offsetof (CoglVertexP3T2C4, x),
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3,
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COGL_ATTRIBUTE_TYPE_FLOAT);
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attributes[1] = cogl_attribute_new (attribute_buffer,
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"cogl_tex_coord0_in",
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sizeof (CoglVertexP3T2C4),
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offsetof (CoglVertexP3T2C4, s),
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2,
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COGL_ATTRIBUTE_TYPE_FLOAT);
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attributes[2] = cogl_attribute_new (attribute_buffer,
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"cogl_color_in",
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sizeof (CoglVertexP3T2C4),
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offsetof (CoglVertexP3T2C4, r),
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4,
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COGL_ATTRIBUTE_TYPE_UNSIGNED_BYTE);
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cogl_object_unref (attribute_buffer);
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return _cogl_primitive_new_with_attributes_unref (mode, n_vertices,
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attributes,
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3);
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}
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static void
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free_attributes_list (CoglPrimitive *primitive)
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{
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int i;
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for (i = 0; i < primitive->attributes->len; i++)
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{
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CoglAttribute *attribute =
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g_array_index (primitive->attributes, CoglAttribute *, i);
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cogl_object_unref (attribute);
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}
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g_array_set_size (primitive->attributes, 0);
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}
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static void
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_cogl_primitive_free (CoglPrimitive *primitive)
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{
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free_attributes_list (primitive);
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g_array_free (primitive->attributes, TRUE);
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g_slice_free (CoglPrimitive, primitive);
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}
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static void
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warn_about_midscene_changes (void)
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{
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static gboolean seen = FALSE;
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if (!seen)
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{
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g_warning ("Mid-scene modification of buffers has "
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"undefined results\n");
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seen = TRUE;
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}
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}
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void
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cogl_primitive_set_attributes (CoglPrimitive *primitive,
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CoglAttribute **attributes,
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int n_attributes)
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{
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int i;
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g_return_if_fail (cogl_is_primitive (primitive));
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if (G_UNLIKELY (primitive->immutable_ref))
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{
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warn_about_midscene_changes ();
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return;
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}
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free_attributes_list (primitive);
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g_array_set_size (primitive->attributes, 0);
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for (i = 0; i < n_attributes; i++)
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{
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cogl_object_ref (attributes[i]);
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g_return_if_fail (cogl_is_attribute (attributes[i]));
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g_array_append_val (primitive->attributes, attributes[i]);
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}
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}
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int
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cogl_primitive_get_first_vertex (CoglPrimitive *primitive)
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{
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g_return_val_if_fail (cogl_is_primitive (primitive), 0);
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return primitive->first_vertex;
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}
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void
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cogl_primitive_set_first_vertex (CoglPrimitive *primitive,
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int first_vertex)
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{
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g_return_if_fail (cogl_is_primitive (primitive));
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if (G_UNLIKELY (primitive->immutable_ref))
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{
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warn_about_midscene_changes ();
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return;
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}
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primitive->first_vertex = first_vertex;
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}
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int
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cogl_primitive_get_n_vertices (CoglPrimitive *primitive)
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{
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g_return_val_if_fail (cogl_is_primitive (primitive), 0);
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return primitive->n_vertices;
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}
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void
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cogl_primitive_set_n_vertices (CoglPrimitive *primitive,
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int n_vertices)
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{
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g_return_if_fail (cogl_is_primitive (primitive));
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primitive->n_vertices = n_vertices;
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}
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CoglVerticesMode
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cogl_primitive_get_mode (CoglPrimitive *primitive)
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{
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g_return_val_if_fail (cogl_is_primitive (primitive), 0);
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return primitive->mode;
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}
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void
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cogl_primitive_set_mode (CoglPrimitive *primitive,
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CoglVerticesMode mode)
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{
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g_return_if_fail (cogl_is_primitive (primitive));
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if (G_UNLIKELY (primitive->immutable_ref))
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{
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warn_about_midscene_changes ();
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return;
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}
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primitive->mode = mode;
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}
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void
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cogl_primitive_set_indices (CoglPrimitive *primitive,
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CoglIndices *indices)
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{
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g_return_if_fail (cogl_is_primitive (primitive));
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if (G_UNLIKELY (primitive->immutable_ref))
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{
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warn_about_midscene_changes ();
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return;
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}
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if (indices)
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cogl_object_ref (indices);
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if (primitive->indices)
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cogl_object_unref (primitive->indices);
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primitive->indices = indices;
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}
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CoglPrimitive *
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_cogl_primitive_immutable_ref (CoglPrimitive *primitive)
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{
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int i;
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g_return_val_if_fail (cogl_is_primitive (primitive), NULL);
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primitive->immutable_ref++;
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for (i = 0; i < primitive->attributes->len; i++)
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{
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CoglAttribute *attribute =
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g_array_index (primitive->attributes, CoglAttribute *, i);
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_cogl_attribute_immutable_ref (attribute);
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}
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return primitive;
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}
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void
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_cogl_primitive_immutable_unref (CoglPrimitive *primitive)
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{
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int i;
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g_return_if_fail (cogl_is_primitive (primitive));
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g_return_if_fail (primitive->immutable_ref > 0);
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primitive->immutable_ref--;
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for (i = 0; i < primitive->attributes->len; i++)
|
|
{
|
|
CoglAttribute *attribute =
|
|
g_array_index (primitive->attributes, CoglAttribute *, i);
|
|
_cogl_attribute_immutable_unref (attribute);
|
|
}
|
|
}
|
|
|
|
/* XXX: cogl_draw_primitive() ? */
|
|
void
|
|
cogl_primitive_draw (CoglPrimitive *primitive)
|
|
{
|
|
CoglAttribute **attributes =
|
|
(CoglAttribute **)primitive->attributes->data;
|
|
|
|
if (primitive->indices)
|
|
cogl_draw_indexed_attributes (primitive->mode,
|
|
primitive->first_vertex,
|
|
primitive->n_vertices,
|
|
primitive->indices,
|
|
attributes,
|
|
primitive->attributes->len);
|
|
else
|
|
cogl_draw_attributes (primitive->mode,
|
|
primitive->first_vertex,
|
|
primitive->n_vertices,
|
|
attributes,
|
|
primitive->attributes->len);
|
|
}
|
|
|