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8ae53cea08
This reverts the change in semantics for cogl_texture_new_with_size so that it goes back to allocating textures synchronously and returning NULL if there was a failure to allocate. Only the new/2.0 texture apis will have the lazy allocation behaviour so we avoid breaking existing code. This also fixes a potential crasher by removing a code path that was passing NULL to cogl_texture_allocate() that would have caused and abort if there were an error. Reviewed-by: Neil Roberts <neil@linux.intel.com>
604 lines
20 KiB
C
604 lines
20 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) 2007,2008,2009,2010 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#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_TEXTURE_H__
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#define __COGL_TEXTURE_H__
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/* We forward declare the CoglTexture type here to avoid some circular
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* dependency issues with the following headers.
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*/
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typedef struct _CoglTexture CoglTexture;
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#include <cogl/cogl-types.h>
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#include <cogl/cogl-defines.h>
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#if defined (COGL_ENABLE_EXPERIMENTAL_API)
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#include <cogl/cogl-pixel-buffer.h>
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#endif
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#include <cogl/cogl-bitmap.h>
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COGL_BEGIN_DECLS
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/**
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* SECTION:cogl-texture
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* @short_description: Functions for creating and manipulating textures
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*
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* Cogl allows creating and manipulating textures using a uniform
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* API that tries to hide all the various complexities of creating,
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* loading and manipulating textures.
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*/
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#define COGL_TEXTURE(X) ((CoglTexture *)X)
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#define COGL_TEXTURE_MAX_WASTE 127
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/**
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* COGL_TEXTURE_ERROR:
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*
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* #CoglError domain for texture errors.
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*
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* Since: 2.0
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* Stability: Unstable
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*/
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#define COGL_TEXTURE_ERROR (cogl_texture_error_quark ())
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/**
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* CoglTextureError:
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* @COGL_TEXTURE_ERROR_SIZE: Unsupported size
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*
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* Error codes that can be thrown when allocating textures.
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*
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* Since: 2.0
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* Stability: Unstable
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*/
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typedef enum {
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COGL_TEXTURE_ERROR_SIZE,
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COGL_TEXTURE_ERROR_FORMAT,
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COGL_TEXTURE_ERROR_BAD_PARAMETER,
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COGL_TEXTURE_ERROR_TYPE
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} CoglTextureError;
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/**
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* CoglTextureType:
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* @COGL_TEXTURE_TYPE_2D: A #CoglTexture2D
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* @COGL_TEXTURE_TYPE_3D: A #CoglTexture3D
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* @COGL_TEXTURE_TYPE_RECTANGLE: A #CoglTextureRectangle
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*
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* Constants representing the underlying hardware texture type of a
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* #CoglTexture.
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*
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* Stability: unstable
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* Since: 1.10
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*/
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typedef enum {
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COGL_TEXTURE_TYPE_2D,
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COGL_TEXTURE_TYPE_3D,
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COGL_TEXTURE_TYPE_RECTANGLE
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} CoglTextureType;
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uint32_t cogl_texture_error_quark (void);
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/**
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* cogl_texture_new_with_size:
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* @width: width of texture in pixels.
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* @height: height of texture in pixels.
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* @flags: Optional flags for the texture, or %COGL_TEXTURE_NONE
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* @internal_format: the #CoglPixelFormat to use for the GPU storage of the
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* texture.
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*
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* Creates a new #CoglTexture with the specified dimensions and pixel format.
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*
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* Return value: A newly created #CoglTexture or %NULL on failure
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*
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* Since: 0.8
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*/
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CoglTexture *
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cogl_texture_new_with_size (unsigned int width,
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unsigned int height,
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CoglTextureFlags flags,
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CoglPixelFormat internal_format);
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/**
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* cogl_texture_new_from_file:
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* @filename: the file to load
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* @flags: Optional flags for the texture, or %COGL_TEXTURE_NONE
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* @internal_format: the #CoglPixelFormat to use for the GPU storage of the
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* texture. If %COGL_PIXEL_FORMAT_ANY is given then a premultiplied
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* format similar to the format of the source data will be used. The
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* default blending equations of Cogl expect premultiplied color data;
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* the main use of passing a non-premultiplied format here is if you
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* have non-premultiplied source data and are going to adjust the blend
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* mode (see cogl_material_set_blend()) or use the data for something
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* other than straight blending.
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* @error: return location for a #CoglError or %NULL
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*
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* Creates a #CoglTexture from an image file.
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*
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* Return value: A newly created #CoglTexture or %NULL on failure
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*
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* Since: 0.8
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*/
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CoglTexture *
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cogl_texture_new_from_file (const char *filename,
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CoglTextureFlags flags,
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CoglPixelFormat internal_format,
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CoglError **error);
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/**
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* cogl_texture_new_from_data:
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* @width: width of texture in pixels
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* @height: height of texture in pixels
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* @flags: Optional flags for the texture, or %COGL_TEXTURE_NONE
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* @format: the #CoglPixelFormat the buffer is stored in in RAM
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* @internal_format: the #CoglPixelFormat that will be used for storing
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* the buffer on the GPU. If COGL_PIXEL_FORMAT_ANY is given then a
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* premultiplied format similar to the format of the source data will
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* be used. The default blending equations of Cogl expect premultiplied
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* color data; the main use of passing a non-premultiplied format here
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* is if you have non-premultiplied source data and are going to adjust
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* the blend mode (see cogl_material_set_blend()) or use the data for
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* something other than straight blending.
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* @rowstride: the memory offset in bytes between the starts of
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* scanlines in @data
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* @data: pointer the memory region where the source buffer resides
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*
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* Creates a new #CoglTexture based on data residing in memory.
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*
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* Return value: A newly created #CoglTexture or %NULL on failure
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*
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* Since: 0.8
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*/
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CoglTexture *
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cogl_texture_new_from_data (int width,
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int height,
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CoglTextureFlags flags,
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CoglPixelFormat format,
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CoglPixelFormat internal_format,
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int rowstride,
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const uint8_t *data);
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/**
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* cogl_texture_new_from_foreign:
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* @gl_handle: opengl handle of foreign texture.
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* @gl_target: opengl target type of foreign texture
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* @width: width of foreign texture
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* @height: height of foreign texture.
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* @x_pot_waste: horizontal waste on the right hand edge of the texture.
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* @y_pot_waste: vertical waste on the bottom edge of the texture.
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* @format: format of the foreign texture.
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*
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* Creates a #CoglTexture based on an existing OpenGL texture; the
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* width, height and format are passed along since it is not always
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* possible to query these from OpenGL.
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*
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* The waste arguments allow you to create a Cogl texture that maps to
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* a region smaller than the real OpenGL texture. For instance if your
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* hardware only supports power-of-two textures you may load a
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* non-power-of-two image into a larger power-of-two texture and use
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* the waste arguments to tell Cogl which region should be mapped to
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* the texture coordinate range [0:1].
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*
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* Return value: A newly created #CoglTexture or %NULL on failure
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*
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* Since: 0.8
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*/
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CoglTexture *
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cogl_texture_new_from_foreign (unsigned int gl_handle,
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unsigned int gl_target,
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unsigned int width,
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unsigned int height,
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unsigned int x_pot_waste,
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unsigned int y_pot_waste,
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CoglPixelFormat format);
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/**
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* cogl_texture_new_from_bitmap:
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* @bitmap: A #CoglBitmap pointer
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* @flags: Optional flags for the texture, or %COGL_TEXTURE_NONE
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* @internal_format: the #CoglPixelFormat to use for the GPU storage of the
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* texture
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*
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* Creates a #CoglTexture from a #CoglBitmap.
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*
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* Return value: A newly created #CoglTexture or %NULL on failure
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*
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* Since: 1.0
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*/
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CoglTexture *
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cogl_texture_new_from_bitmap (CoglBitmap *bitmap,
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CoglTextureFlags flags,
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CoglPixelFormat internal_format);
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/**
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* cogl_is_texture:
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* @object: A #CoglObject pointer
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*
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* Gets whether the given object references a texture object.
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*
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* Return value: %TRUE if the @object references a texture, and
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* %FALSE otherwise
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*/
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CoglBool
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cogl_is_texture (void *object);
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/**
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* cogl_texture_get_width:
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* @texture: a #CoglTexture pointer.
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*
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* Queries the width of a cogl texture.
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*
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* Return value: the width of the GPU side texture in pixels
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*/
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unsigned int
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cogl_texture_get_width (CoglTexture *texture);
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/**
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* cogl_texture_get_height:
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* @texture: a #CoglTexture pointer.
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*
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* Queries the height of a cogl texture.
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*
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* Return value: the height of the GPU side texture in pixels
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*/
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unsigned int
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cogl_texture_get_height (CoglTexture *texture);
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/**
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* cogl_texture_get_format:
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* @texture: a #CoglTexture pointer.
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*
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* Queries the #CoglPixelFormat of a cogl texture.
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*
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* Return value: the #CoglPixelFormat of the GPU side texture
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*/
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CoglPixelFormat
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cogl_texture_get_format (CoglTexture *texture);
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/**
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* cogl_texture_get_rowstride:
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* @texture a #CoglTexture pointer.
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*
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* Determines the bytes-per-pixel for the #CoglPixelFormat retrieved
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* from cogl_texture_get_format() and multiplies that by the texture's
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* width.
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*
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* <note>It's very unlikely that anyone would need to use this API to
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* query the internal rowstride of a #CoglTexture which can just be
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* considered an implementation detail. Actually it's not even useful
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* internally since underlying drivers are free to use a different
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* format</note>
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*
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* <note>This API is only here for backwards compatibility and
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* shouldn't be used in new code. In particular please don't be
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* mislead to pass the returned value to cogl_texture_get_data() for
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* the rowstride, since you should be passing the rowstride you desire
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* for your destination buffer not the rowstride of the source
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* texture.</note>
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*
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* Return value: The bytes-per-pixel for the current format
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* multiplied by the texture's width
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*
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* Deprecated: 1.10: There's no replacement for the API but there's
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* also no known need for API either. It was just
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* a mistake that it was ever published.
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*/
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COGL_DEPRECATED_IN_1_10
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unsigned int
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cogl_texture_get_rowstride (CoglTexture *texture);
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/**
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* cogl_texture_get_max_waste:
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* @texture: a #CoglTexture pointer.
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*
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* Queries the maximum wasted (unused) pixels in one dimension of a GPU side
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* texture.
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*
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* Return value: the maximum waste
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*/
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int
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cogl_texture_get_max_waste (CoglTexture *texture);
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/**
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* cogl_texture_is_sliced:
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* @texture: a #CoglTexture pointer.
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*
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* Queries if a texture is sliced (stored as multiple GPU side tecture
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* objects).
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*
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* Return value: %TRUE if the texture is sliced, %FALSE if the texture
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* is stored as a single GPU texture
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*/
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CoglBool
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cogl_texture_is_sliced (CoglTexture *texture);
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/**
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* cogl_texture_get_gl_texture:
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* @texture: a #CoglTexture pointer.
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* @out_gl_handle: (out) (allow-none): pointer to return location for the
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* textures GL handle, or %NULL.
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* @out_gl_target: (out) (allow-none): pointer to return location for the
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* GL target type, or %NULL.
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*
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* Queries the GL handles for a GPU side texture through its #CoglTexture.
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*
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* If the texture is spliced the data for the first sub texture will be
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* queried.
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*
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* Return value: %TRUE if the handle was successfully retrieved, %FALSE
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* if the handle was invalid
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*/
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CoglBool
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cogl_texture_get_gl_texture (CoglTexture *texture,
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unsigned int *out_gl_handle,
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unsigned int *out_gl_target);
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/**
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* cogl_texture_get_data:
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* @texture: a #CoglTexture pointer.
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* @format: the #CoglPixelFormat to store the texture as.
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* @rowstride: the rowstride of @data in bytes or pass 0 to calculate
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* from the bytes-per-pixel of @format multiplied by the
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* @texture width.
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* @data: memory location to write the @texture's contents, or %NULL
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* to only query the data size through the return value.
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*
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* Copies the pixel data from a cogl texture to system memory.
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*
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* <note>Don't pass the value of cogl_texture_get_rowstride() as the
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* @rowstride argument, the rowstride should be the rowstride you
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* want for the destination @data buffer not the rowstride of the
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* source texture</note>
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*
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* Return value: the size of the texture data in bytes
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*/
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int
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cogl_texture_get_data (CoglTexture *texture,
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CoglPixelFormat format,
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unsigned int rowstride,
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uint8_t *data);
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/**
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* cogl_texture_set_region:
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* @texture: a #CoglTexture.
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* @src_x: upper left coordinate to use from source data.
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* @src_y: upper left coordinate to use from source data.
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* @dst_x: upper left destination horizontal coordinate.
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* @dst_y: upper left destination vertical coordinate.
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* @dst_width: width of destination region to write. (Must be less
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* than or equal to @width)
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* @dst_height: height of destination region to write. (Must be less
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* than or equal to @height)
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* @width: width of source data buffer.
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* @height: height of source data buffer.
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* @format: the #CoglPixelFormat used in the source buffer.
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* @rowstride: rowstride of source buffer (computed from width if none
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* specified)
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* @data: the actual pixel data.
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*
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* Sets the pixels in a rectangular subregion of @texture from an in-memory
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* buffer containing pixel data.
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*
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* <note>The region set can't be larger than the source @data</note>
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*
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* Return value: %TRUE if the subregion upload was successful, and
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* %FALSE otherwise
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*/
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CoglBool
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cogl_texture_set_region (CoglTexture *texture,
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int src_x,
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int src_y,
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int dst_x,
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int dst_y,
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unsigned int dst_width,
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unsigned int dst_height,
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int width,
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int height,
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CoglPixelFormat format,
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unsigned int rowstride,
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const uint8_t *data);
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#if defined (COGL_ENABLE_EXPERIMENTAL_API)
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/**
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* cogl_texture_set_data:
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* @texture a #CoglTexture.
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* @format: the #CoglPixelFormat used in the source @data buffer.
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* @rowstride: rowstride of the source @data buffer (computed from
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* the texture width and @format if it equals 0)
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* @data: the source data, pointing to the first top-left pixel to set
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* @level: The mipmap level to update (Normally 0 for the largest,
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* base texture)
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* @error: A #CoglError to return exceptional errors
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*
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* Sets all the pixels for a given mipmap @level by copying the pixel
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* data pointed to by the @data argument into the given @texture.
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*
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* @data should point to the first pixel to copy corresponding
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* to the top left of the mipmap @level being set.
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*
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* If @rowstride equals 0 then it will be automatically calculated
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* from the width of the mipmap level and the bytes-per-pixel for the
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* given @format.
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*
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* A mipmap @level of 0 corresponds to the largest, base image of a
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* texture and @level 1 is half the width and height of level 0. If
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* dividing any dimension of the previous level by two results in a
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* fraction then round the number down (floor()), but clamp to 1
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* something like this:
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*
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* |[
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* next_width = MAX (1, floor (prev_width));
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* ]|
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*
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* You can determine the number of mipmap levels for a given texture
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* like this:
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*
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* |[
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* n_levels = 1 + floor (log2 (max_dimension));
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* ]|
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*
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* Where %max_dimension is the larger of cogl_texture_get_width() and
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* cogl_texture_get_height().
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*
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* It is an error to pass a @level number >= the number of levels that
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* @texture can have according to the above calculation.
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*
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* <note>Since the storage for a #CoglTexture is allocated lazily then
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* if the given @texture has not previously been allocated then this
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* api can return %FALSE and throw an exceptional @error if there is
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* not enough memory to allocate storage for @texture.</note>
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*
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* Return value: %TRUE if the data upload was successful, and
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* %FALSE otherwise
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*/
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CoglBool
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cogl_texture_set_data (CoglTexture *texture,
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CoglPixelFormat format,
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int rowstride,
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const uint8_t *data,
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int level,
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CoglError **error);
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/**
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* cogl_texture_set_region_from_bitmap:
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* @texture: a #CoglTexture pointer
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* @src_x: upper left coordinate to use from the source bitmap.
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* @src_y: upper left coordinate to use from the source bitmap
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* @dst_x: upper left destination horizontal coordinate.
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* @dst_y: upper left destination vertical coordinate.
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* @dst_width: width of destination region to write. (Must be less
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* than or equal to the bitmap width)
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* @dst_height: height of destination region to write. (Must be less
|
|
* than or equal to the bitmap height)
|
|
* @bitmap: The source bitmap to read from
|
|
*
|
|
* Copies a specified source region from @bitmap to the position
|
|
* (@src_x, @src_y) of the given destination texture @handle.
|
|
*
|
|
* <note>The region updated can't be larger than the source
|
|
* bitmap</note>
|
|
*
|
|
* Return value: %TRUE if the subregion upload was successful, and
|
|
* %FALSE otherwise
|
|
*
|
|
* Since: 1.8
|
|
* Stability: unstable
|
|
*/
|
|
CoglBool
|
|
cogl_texture_set_region_from_bitmap (CoglTexture *texture,
|
|
int src_x,
|
|
int src_y,
|
|
int dst_x,
|
|
int dst_y,
|
|
unsigned int dst_width,
|
|
unsigned int dst_height,
|
|
CoglBitmap *bitmap);
|
|
#endif
|
|
|
|
/**
|
|
* cogl_texture_new_from_sub_texture:
|
|
* @full_texture: a #CoglTexture pointer
|
|
* @sub_x: X coordinate of the top-left of the subregion
|
|
* @sub_y: Y coordinate of the top-left of the subregion
|
|
* @sub_width: Width in pixels of the subregion
|
|
* @sub_height: Height in pixels of the subregion
|
|
*
|
|
* Creates a new texture which represents a subregion of another
|
|
* texture. The GL resources will be shared so that no new texture
|
|
* data is actually allocated.
|
|
*
|
|
* Sub textures have undefined behaviour texture coordinates outside
|
|
* of the range [0,1] are used. They also do not work with
|
|
* CoglVertexBuffers.
|
|
*
|
|
* The sub texture will keep a reference to the full texture so you do
|
|
* not need to keep one separately if you only want to use the sub
|
|
* texture.
|
|
*
|
|
* Return value: A newly created #CoglTexture or %NULL on failure
|
|
* Since: 1.2
|
|
*/
|
|
CoglTexture *
|
|
cogl_texture_new_from_sub_texture (CoglTexture *full_texture,
|
|
int sub_x,
|
|
int sub_y,
|
|
int sub_width,
|
|
int sub_height);
|
|
|
|
/**
|
|
* cogl_texture_ref:
|
|
* @texture: a #CoglTexture.
|
|
*
|
|
* Increment the reference count for a cogl texture.
|
|
*
|
|
* Deprecated: 1.2: Use cogl_object_ref() instead
|
|
*
|
|
* Return value: the @texture pointer.
|
|
*/
|
|
COGL_DEPRECATED_FOR (cogl_object_ref)
|
|
void *
|
|
cogl_texture_ref (void *texture);
|
|
|
|
/**
|
|
* cogl_texture_unref:
|
|
* @texture: a #CoglTexture.
|
|
*
|
|
* Decrement the reference count for a cogl texture.
|
|
*
|
|
* Deprecated: 1.2: Use cogl_object_unref() instead
|
|
*/
|
|
COGL_DEPRECATED_FOR (cogl_object_unref)
|
|
void
|
|
cogl_texture_unref (void *texture);
|
|
|
|
/**
|
|
* cogl_texture_allocate:
|
|
* @texture: A #CoglTexture
|
|
* @error: A #CoglError to return exceptional errors or %NULL
|
|
*
|
|
* Explicitly allocates the storage for the given @texture which
|
|
* allows you to be sure that there is enough memory for the
|
|
* texture and if not then the error can be handled gracefully.
|
|
*
|
|
* <note>Normally applications don't need to use this api directly
|
|
* since the texture will be implicitly allocated when data is set on
|
|
* the texture, or if the texture is attached to a #CoglOffscreen
|
|
* framebuffer and rendered too.</note>
|
|
*
|
|
* Return value: %TRUE if the texture was successfully allocated,
|
|
* otherwise %FALSE and @error will be updated if it
|
|
* wasn't %NULL.
|
|
*/
|
|
CoglBool
|
|
cogl_texture_allocate (CoglTexture *texture,
|
|
CoglError **error);
|
|
|
|
COGL_END_DECLS
|
|
|
|
#endif /* __COGL_TEXTURE_H__ */
|