a0441778ad
Since the Cogl 1.18 branch is actively maintained in parallel with the
master branch; this is a counter part to commit 1b83ef938fc16b which
re-licensed the master branch to use the MIT license.
This re-licensing is a follow up to the proposal that was sent to the
Cogl mailing list:
http://lists.freedesktop.org/archives/cogl/2013-December/001465.html
Note: there was a copyright assignment policy in place for Clutter (and
therefore Cogl which was part of Clutter at the time) until the 11th of
June 2010 and so we only checked the details after that point (commit
0bbf50f905)
For each file, authors were identified via this Git command:
$ git blame -p -C -C -C20 -M -M10 0bbf50f905..HEAD
We received blanket approvals for re-licensing all Red Hat and Collabora
contributions which reduced how many people needed to be contacted
individually:
- http://lists.freedesktop.org/archives/cogl/2013-December/001470.html
- http://lists.freedesktop.org/archives/cogl/2014-January/001536.html
Individual approval requests were sent to all the other identified authors
who all confirmed the re-license on the Cogl mailinglist:
http://lists.freedesktop.org/archives/cogl/2014-January
As well as updating the copyright header in all sources files, the
COPYING file has been updated to reflect the license change and also
document the other licenses used in Cogl such as the SGI Free Software
License B, version 2.0 and the 3-clause BSD license.
This patch was not simply cherry-picked from master; but the same
methodology was used to check the source files.
452 lines
16 KiB
C
452 lines
16 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) 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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* Authors:
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* Robert Bragg <robert@linux.intel.com>
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*/
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#if !defined(__COGL_H_INSIDE__) && !defined(COGL_COMPILATION)
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#error "Only <cogl/cogl.h> can be included directly."
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#endif
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#ifndef __COGL_VERTEX_BUFFER_H__
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#define __COGL_VERTEX_BUFFER_H__
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#include <glib.h>
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#include <cogl/cogl-defines.h>
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#include <cogl/cogl-types.h>
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#include <cogl/cogl-macros.h>
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COGL_BEGIN_DECLS
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/**
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* SECTION:cogl-vertex-buffer
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* @short_description: An API for submitting extensible arrays of vertex
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* attributes to be mapped into the GPU for fast drawing.
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*
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* For example to describe a textured triangle, you could create a new cogl
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* vertex buffer with 3 vertices, and then you might add 2 attributes for each
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* vertex:
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* <orderedlist>
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* <listitem>
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* a "gl_Position" describing the (x,y,z) position for each vertex.
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* </listitem>
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* <listitem>
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* a "gl_MultiTexCoord0" describing the (tx,ty) texture coordinates for each
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* vertex.
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* </listitem>
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* </orderedlist>
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*
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* The Vertex Buffer API is designed to be a fairly raw mechanism for
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* developers to be able to submit geometry to Cogl in a format that can be
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* directly consumed by an OpenGL driver and mapped into your GPU for fast
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* re-use. It is designed to avoid repeated validation of the attributes by the
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* driver; to minimize transport costs (e.g. considering indirect GLX
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* use-cases) and to potentially avoid repeated format conversions when
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* attributes are supplied in a format that is not natively supported by the
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* GPU.
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*
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* Although this API does allow you to modify attributes after they have been
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* submitted to the GPU you should be aware that modification is not that
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* cheap, since it implies validating the new data and potentially the
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* OpenGL driver will need to reformat it for the GPU.
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*
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* If at all possible think of tricks that let you re-use static attributes,
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* and if you do need to repeatedly update attributes (e.g. for some kind of
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* morphing geometry) then only update and re-submit the specific attributes
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* that have changed.
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*/
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/**
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* cogl_vertex_buffer_new:
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* @n_vertices: The number of vertices that your attributes will correspond to.
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*
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* Creates a new vertex buffer that you can use to add attributes.
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*
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* Return value: a new #CoglHandle
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* Deprecated: 1.16: Use the #CoglPrimitive api instead
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*/
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COGL_DEPRECATED_IN_1_16_FOR (cogl_primitive_API)
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CoglHandle
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cogl_vertex_buffer_new (unsigned int n_vertices);
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/**
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* cogl_vertex_buffer_get_n_vertices:
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* @handle: A vertex buffer handle
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*
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* Retrieves the number of vertices that @handle represents
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*
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* Return value: the number of vertices
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* Deprecated: 1.16: Use the #CoglPrimitive api instead
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*/
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COGL_DEPRECATED_IN_1_16_FOR (cogl_primitive_API)
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unsigned int
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cogl_vertex_buffer_get_n_vertices (CoglHandle handle);
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/**
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* cogl_vertex_buffer_add:
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* @handle: A vertex buffer handle
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* @attribute_name: The name of your attribute. It should be a valid GLSL
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* variable name and standard attribute types must use one of following
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* built-in names: (Note: they correspond to the built-in names of GLSL)
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* <itemizedlist>
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* <listitem>"gl_Color"</listitem>
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* <listitem>"gl_Normal"</listitem>
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* <listitem>"gl_MultiTexCoord0, gl_MultiTexCoord1, ..."</listitem>
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* <listitem>"gl_Vertex"</listitem>
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* </itemizedlist>
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* To support adding multiple variations of the same attribute the name
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* can have a detail component, E.g. "gl_Color::active" or
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* "gl_Color::inactive"
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* @n_components: The number of components per attribute and must be 1, 2,
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* 3 or 4
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* @type: a #CoglAttributeType specifying the data type of each component.
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* @normalized: If %TRUE, this specifies that values stored in an integer
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* format should be mapped into the range [-1.0, 1.0] or [0.0, 1.0]
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* for unsigned values. If %FALSE they are converted to floats
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* directly.
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* @stride: This specifies the number of bytes from the start of one attribute
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* value to the start of the next value (for the same attribute). So, for
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* example, with a position interleved with color like this:
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* XYRGBAXYRGBAXYRGBA, then if each letter represents a byte, the
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* stride for both attributes is 6. The special value 0 means the
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* values are stored sequentially in memory.
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* @pointer: This addresses the first attribute in the vertex array. This
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* must remain valid until you either call cogl_vertex_buffer_submit() or
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* issue a draw call.
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*
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* Adds an attribute to a buffer, or replaces a previously added
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* attribute with the same name.
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*
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* You either can use one of the built-in names such as "gl_Vertex", or
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* "gl_MultiTexCoord0" to add standard attributes, like positions, colors
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* and normals, or you can add custom attributes for use in shaders.
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*
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* The number of vertices declared when calling cogl_vertex_buffer_new()
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* determines how many attribute values will be read from the supplied
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* @pointer.
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*
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* The data for your attribute isn't copied anywhere until you call
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* cogl_vertex_buffer_submit(), or issue a draw call which automatically
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* submits pending attribute changes. so the supplied pointer must remain
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* valid until then. If you are updating an existing attribute (done by
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* re-adding it) then you still need to re-call cogl_vertex_buffer_submit()
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* to commit the changes to the GPU. Be carefull to minimize the number
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* of calls to cogl_vertex_buffer_submit(), though.
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*
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* <note>If you are interleving attributes it is assumed that each interleaved
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* attribute starts no farther than +- stride bytes from the other attributes
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* it is interleved with. I.e. this is ok:
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* <programlisting>
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* |-0-0-0-0-0-0-0-0-0-0|
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* </programlisting>
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* This is not ok:
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* <programlisting>
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* |- - - - -0-0-0-0-0-0 0 0 0 0|
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* </programlisting>
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* (Though you can have multiple groups of interleved attributes)</note>
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*
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* Deprecated: 1.16: Use the #CoglPrimitive api instead
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*/
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COGL_DEPRECATED_IN_1_16_FOR (cogl_primitive_API)
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void
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cogl_vertex_buffer_add (CoglHandle handle,
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const char *attribute_name,
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uint8_t n_components,
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CoglAttributeType type,
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CoglBool normalized,
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uint16_t stride,
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const void *pointer);
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/**
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* cogl_vertex_buffer_delete:
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* @handle: A vertex buffer handle
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* @attribute_name: The name of a previously added attribute
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*
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* Deletes an attribute from a buffer. You will need to call
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* cogl_vertex_buffer_submit() or issue a draw call to commit this
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* change to the GPU.
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*
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* Deprecated: 1.16: Use the #CoglPrimitive api instead
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*/
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COGL_DEPRECATED_IN_1_16_FOR (cogl_primitive_API)
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void
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cogl_vertex_buffer_delete (CoglHandle handle,
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const char *attribute_name);
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/**
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* cogl_vertex_buffer_submit:
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* @handle: A vertex buffer handle
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*
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* Submits all the user added attributes to the GPU; once submitted, the
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* attributes can be used for drawing.
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*
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* You should aim to minimize calls to this function since it implies
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* validating your data; it potentially incurs a transport cost (especially if
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* you are using GLX indirect rendering) and potentially a format conversion
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* cost if the GPU doesn't natively support any of the given attribute formats.
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*
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* Deprecated: 1.16: Use the #CoglPrimitive api instead
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*/
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COGL_DEPRECATED_IN_1_16_FOR (cogl_primitive_API)
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void
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cogl_vertex_buffer_submit (CoglHandle handle);
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/**
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* cogl_vertex_buffer_disable:
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* @handle: A vertex buffer handle
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* @attribute_name: The name of the attribute you want to disable
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*
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* Disables a previosuly added attribute.
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*
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* Since it can be costly to add and remove new attributes to buffers; to make
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* individual buffers more reuseable it is possible to enable and disable
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* attributes before using a buffer for drawing.
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*
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* You don't need to call cogl_vertex_buffer_submit() after using this
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* function.
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*
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* Deprecated: 1.16: Use the #CoglPrimitive api instead
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*/
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COGL_DEPRECATED_IN_1_16_FOR (cogl_primitive_API)
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void
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cogl_vertex_buffer_disable (CoglHandle handle,
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const char *attribute_name);
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/**
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* cogl_vertex_buffer_enable:
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* @handle: A vertex buffer handle
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* @attribute_name: The name of the attribute you want to enable
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*
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* Enables a previosuly disabled attribute.
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*
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* Since it can be costly to add and remove new attributes to buffers; to make
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* individual buffers more reuseable it is possible to enable and disable
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* attributes before using a buffer for drawing.
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*
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* You don't need to call cogl_vertex_buffer_submit() after using this function
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*
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* Deprecated: 1.16: Use the #CoglPrimitive api instead
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*/
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COGL_DEPRECATED_IN_1_16_FOR (cogl_primitive_API)
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void
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cogl_vertex_buffer_enable (CoglHandle handle,
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const char *attribute_name);
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/**
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* cogl_vertex_buffer_draw:
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* @handle: A vertex buffer handle
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* @mode: A #CoglVerticesMode specifying how the vertices should be
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* interpreted.
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* @first: Specifies the index of the first vertex you want to draw with
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* @count: Specifies the number of vertices you want to draw.
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*
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* Allows you to draw geometry using all or a subset of the
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* vertices in a vertex buffer.
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*
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* Any un-submitted attribute changes are automatically submitted before
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* drawing.
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*
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* Deprecated: 1.16: Use the #CoglPrimitive api instead
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*/
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COGL_DEPRECATED_IN_1_16_FOR (cogl_primitive_API)
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void
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cogl_vertex_buffer_draw (CoglHandle handle,
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CoglVerticesMode mode,
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int first,
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int count);
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/**
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* cogl_vertex_buffer_indices_new:
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* @indices_type: a #CoglIndicesType specifying the data type used for
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* the indices.
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* @indices_array: (array length=indices_len): Specifies the address of
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* your array of indices
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* @indices_len: The number of indices in indices_array
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*
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* Depending on how much geometry you are submitting it can be worthwhile
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* optimizing the number of redundant vertices you submit. Using an index
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* array allows you to reference vertices multiple times, for example
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* during triangle strips.
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*
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* Return value: A CoglHandle for the indices which you can pass to
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* cogl_vertex_buffer_draw_elements().
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*
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* Deprecated: 1.16: Use the #CoglPrimitive api instead
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*/
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COGL_DEPRECATED_IN_1_16_FOR (cogl_primitive_API)
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CoglHandle
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cogl_vertex_buffer_indices_new (CoglIndicesType indices_type,
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const void *indices_array,
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int indices_len);
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/**
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* cogl_vertex_buffer_indices_get_type:
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* @indices: An indices handle
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*
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* Queries back the data type used for the given indices
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*
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* Returns: The CoglIndicesType used
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*
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* Deprecated: 1.16: Use the #CoglPrimitive api instead
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*/
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COGL_DEPRECATED_IN_1_16_FOR (cogl_primitive_API)
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CoglIndicesType
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cogl_vertex_buffer_indices_get_type (CoglHandle indices);
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/**
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* cogl_vertex_buffer_draw_elements:
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* @handle: A vertex buffer handle
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* @mode: A #CoglVerticesMode specifying how the vertices should be
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* interpreted.
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* @indices: A CoglHandle for a set of indices allocated via
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* cogl_vertex_buffer_indices_new ()
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* @min_index: Specifies the minimum vertex index contained in indices
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* @max_index: Specifies the maximum vertex index contained in indices
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* @indices_offset: An offset into named indices. The offset marks the first
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* index to use for drawing.
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* @count: Specifies the number of vertices you want to draw.
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*
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* This function lets you use an array of indices to specify the vertices
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* within your vertex buffer that you want to draw. The indices themselves
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* are created by calling cogl_vertex_buffer_indices_new ()
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*
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* Any un-submitted attribute changes are automatically submitted before
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* drawing.
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* Deprecated: 1.16: Use the #CoglPrimitive api instead
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*/
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COGL_DEPRECATED_IN_1_16_FOR (cogl_primitive_API)
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void
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cogl_vertex_buffer_draw_elements (CoglHandle handle,
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CoglVerticesMode mode,
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CoglHandle indices,
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int min_index,
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int max_index,
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int indices_offset,
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int count);
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/**
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* cogl_vertex_buffer_ref:
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* @handle: a @CoglHandle.
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*
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* Increment the reference count for a vertex buffer
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*
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* Return value: the @handle.
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*
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* Deprecated: 1.2: Use cogl_object_ref() instead
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*/
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COGL_DEPRECATED_FOR (cogl_object_ref)
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CoglHandle
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cogl_vertex_buffer_ref (CoglHandle handle);
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/**
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* cogl_vertex_buffer_unref:
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* @handle: a @CoglHandle.
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*
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* Decrement the reference count for a vertex buffer
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*
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* Deprecated: 1.2: Use cogl_object_unref() instead
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*/
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COGL_DEPRECATED_FOR (cogl_object_unref)
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void
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cogl_vertex_buffer_unref (CoglHandle handle);
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/**
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* cogl_vertex_buffer_indices_get_for_quads:
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* @n_indices: the number of indices in the vertex buffer.
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*
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* Creates a vertex buffer containing the indices needed to draw pairs
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* of triangles from a list of vertices grouped as quads. There will
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* be at least @n_indices entries in the buffer (but there may be
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* more).
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*
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* The indices will follow this pattern:
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*
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* 0, 1, 2, 0, 2, 3, 4, 5, 6, 4, 6, 7 ... etc
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*
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* For example, if you submit vertices for a quad like like that shown
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* in <xref linkend="quad-indices-order"/> then you can request 6
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* indices to render two triangles like those shown in <xref
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* linkend="quad-indices-triangles"/>.
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*
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* <figure id="quad-indices-order">
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* <title>Example of vertices submitted to form a quad</title>
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* <graphic fileref="quad-indices-order.png" format="PNG"/>
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* </figure>
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*
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* <figure id="quad-indices-triangles">
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* <title>Illustration of the triangle indices that will be generated</title>
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* <graphic fileref="quad-indices-triangles.png" format="PNG"/>
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* </figure>
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*
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* Returns: A %CoglHandle containing the indices. The handled is
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* owned by Cogl and should not be modified or unref'd.
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*
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* Deprecated: 1.16: Use the #CoglPrimitive api instead
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*/
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COGL_DEPRECATED_IN_1_16_FOR (cogl_primitive_API)
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CoglHandle
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cogl_vertex_buffer_indices_get_for_quads (unsigned int n_indices);
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/**
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* cogl_is_vertex_buffer:
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* @handle: a #CoglHandle for a vertex buffer object
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*
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* Checks whether @handle is a Vertex Buffer Object
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*
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* Return value: %TRUE if the handle is a VBO, and %FALSE
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* otherwise
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*
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* Since: 1.0
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* Deprecated: 1.16: Use the #CoglPrimitive api instead
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*/
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COGL_DEPRECATED_IN_1_16_FOR (cogl_primitive_API)
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CoglBool
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cogl_is_vertex_buffer (CoglHandle handle);
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/**
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* cogl_is_vertex_buffer_indices:
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* @handle: a #CoglHandle
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*
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* Checks whether @handle is a handle to the indices for a vertex
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* buffer object
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*
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* Return value: %TRUE if the handle is indices, and %FALSE
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* otherwise
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*
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* Since: 1.4
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* Deprecated: 1.16: Use the #CoglPrimitive api instead
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*/
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COGL_DEPRECATED_IN_1_16_FOR (cogl_primitive_API)
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CoglBool
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cogl_is_vertex_buffer_indices (CoglHandle handle);
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COGL_END_DECLS
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#endif /* __COGL_VERTEX_BUFFER_H__ */
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