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.
210 lines
8.0 KiB
C
210 lines
8.0 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) 2011 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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* Authors:
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* Robert Bragg <robert@linux.intel.com>
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*/
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#ifndef __COGL_TEXURE_RECTANGLE_H
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#define __COGL_TEXURE_RECTANGLE_H
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#include "cogl-context.h"
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COGL_BEGIN_DECLS
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/**
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* SECTION:cogl-texture-rectangle
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* @short_description: Functions for creating and manipulating rectangle
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* textures for use with non-normalized coordinates.
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*
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* These functions allow low-level "rectangle" textures to be allocated.
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* These textures are never constrained to power-of-two sizes but they
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* also don't support having a mipmap and can only be wrapped with
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* %COGL_PIPELINE_WRAP_MODE_CLAMP_TO_EDGE.
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*
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* The most notable difference between rectangle textures and 2D
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* textures is that rectangle textures are sampled using un-normalized
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* texture coordinates, so instead of using coordinates (0,0) and
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* (1,1) to map to the top-left and bottom right corners of the
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* texture you would instead use (0,0) and (width,height).
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*
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* The use of non-normalized coordinates can be particularly
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* convenient when writing glsl shaders that use a texture as a lookup
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* table since you don't need to upload separate uniforms to map
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* normalized coordinates to texels.
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*
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* If you want to sample from a rectangle texture from GLSL you should
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* use the sampler2DRect sampler type.
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*
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* Applications wanting to use #CoglTextureRectangle should first check
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* for the %COGL_FEATURE_ID_TEXTURE_RECTANGLE feature using
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* cogl_has_feature().
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*/
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typedef struct _CoglTextureRectangle CoglTextureRectangle;
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#define COGL_TEXTURE_RECTANGLE(X) ((CoglTextureRectangle *)X)
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/**
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* cogl_is_texture_rectangle:
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* @object: A #CoglObject
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*
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* Gets whether the given object references an existing
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* #CoglTextureRectangle object.
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*
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* Return value: %TRUE if the object references a
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* #CoglTextureRectangle, %FALSE otherwise.
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*/
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CoglBool
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cogl_is_texture_rectangle (void *object);
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/**
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* cogl_texture_rectangle_new_with_size:
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* @ctx: A #CoglContext pointer
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* @width: The texture width to allocate
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* @height: The texture height to allocate
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*
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* Creates a new #CoglTextureRectangle texture with a given @width,
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* and @height. This texture is a low-level texture that the GPU can
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* sample from directly unlike high-level textures such as
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* #CoglTexture2DSliced and #CoglAtlasTexture.
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*
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* <note>Unlike for #CoglTexture2D textures, coordinates for
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* #CoglTextureRectangle textures should not be normalized. So instead
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* of using the coordinate (1, 1) to sample the bottom right corner of
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* a rectangle texture you would use (@width, @height) where @width
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* and @height are the width and height of the texture.</note>
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*
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* <note>If you want to sample from a rectangle texture from GLSL you
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* should use the sampler2DRect sampler type.</note>
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*
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* <note>Applications wanting to use #CoglTextureRectangle should
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* first check for the %COGL_FEATURE_ID_TEXTURE_RECTANGLE feature
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* using cogl_has_feature().</note>
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*
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* The storage for the texture is not allocated before this function
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* returns. You can call cogl_texture_allocate() to explicitly
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* allocate the underlying storage or preferably let Cogl
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* automatically allocate storage lazily when it may know more about
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* how the texture is going to be used and can optimize how it is
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* allocated.
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*
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* Returns value: (transfer full): A pointer to a new #CoglTextureRectangle
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* object with no storage allocated yet.
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*
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* Since: 1.10
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* Stability: unstable
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*/
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CoglTextureRectangle *
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cogl_texture_rectangle_new_with_size (CoglContext *ctx,
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int width,
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int height);
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/**
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* cogl_texture_rectangle_new_from_bitmap:
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* @bitmap: A #CoglBitmap
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*
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* Allocates a new #CoglTextureRectangle texture which will be
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* initialized with the pixel data from @bitmap. This texture is a
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* low-level texture that the GPU can sample from directly unlike
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* high-level textures such as #CoglTexture2DSliced and
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* #CoglAtlasTexture.
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*
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* <note>Unlike for #CoglTexture2D textures, coordinates for
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* #CoglTextureRectangle textures should not be normalized. So instead
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* of using the coordinate (1, 1) to sample the bottom right corner of
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* a rectangle texture you would use (@width, @height) where @width
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* and @height are the width and height of the texture.</note>
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*
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* <note>If you want to sample from a rectangle texture from GLSL you
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* should use the sampler2DRect sampler type.</note>
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*
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* <note>Applications wanting to use #CoglTextureRectangle should
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* first check for the %COGL_FEATURE_ID_TEXTURE_RECTANGLE feature
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* using cogl_has_feature().</note>
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*
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* The storage for the texture is not allocated before this function
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* returns. You can call cogl_texture_allocate() to explicitly
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* allocate the underlying storage or preferably let Cogl
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* automatically allocate storage lazily when it may know more about
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* how the texture is going to be used and can optimize how it is
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* allocated.
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*
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* Return value: (transfer full): A pointer to a new
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* #CoglTextureRectangle texture.
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* Since: 2.0
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* Stability: unstable
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*/
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CoglTextureRectangle *
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cogl_texture_rectangle_new_from_bitmap (CoglBitmap *bitmap);
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/**
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* cogl_texture_rectangle_new_from_foreign:
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* @ctx: A #CoglContext
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* @gl_handle: A GL handle for a GL_TEXTURE_RECTANGLE texture object
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* @width: Width of the foreign GL texture
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* @height: Height of the foreign GL texture
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* @format: The format of the texture
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*
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* Wraps an existing GL_TEXTURE_RECTANGLE texture object as a
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* #CoglTextureRectangle. This can be used for integrating Cogl with
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* software using OpenGL directly.
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*
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* <note>Unlike for #CoglTexture2D textures, coordinates for
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* #CoglTextureRectangle textures should not be normalized. So instead
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* of using the coordinate (1, 1) to sample the bottom right corner of
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* a rectangle texture you would use (@width, @height) where @width
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* and @height are the width and height of the texture.</note>
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*
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* <note>The results are undefined for passing an invalid @gl_handle
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* or if @width or @height don't have the correct texture
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* geometry.</note>
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*
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* <note>If you want to sample from a rectangle texture from GLSL you
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* should use the sampler2DRect sampler type.</note>
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*
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* <note>Applications wanting to use #CoglTextureRectangle should
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* first check for the %COGL_FEATURE_ID_TEXTURE_RECTANGLE feature
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* using cogl_has_feature().</note>
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*
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* The texture is still configurable until it has been allocated so
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* for example you can declare whether the texture is premultiplied
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* with cogl_texture_set_premultiplied().
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*
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* Return value: (transfer full): A new #CoglTextureRectangle texture
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*/
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CoglTextureRectangle *
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cogl_texture_rectangle_new_from_foreign (CoglContext *ctx,
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unsigned int gl_handle,
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int width,
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int height,
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CoglPixelFormat format);
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COGL_END_DECLS
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#endif /* __COGL_TEXURE_RECTANGLE_H */
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