6197e3abf3
This adds public constructors which take a CoglBitmap to all primitive texture types. This constructor should be considered the canonical constructor for initializing the texture with data because it should be possible to wrap any type of data in a CoglBitmap. Having at least this single constructor avoids the need to have an explosion of constructors such as new_from_data, new_from_pixel_buffer and new_from_file etc. The already available internal bitmap constructor for CoglTexture2D has had its flags parameter removed under the assumption that flags do not make sense for primitive textures. The meta constructor cogl_texture_new_from_bitmap now just explicitly calls set_auto_mipmap after constructing the texture depending on the value of the COGL_TEXTURE_NO_AUTO_MIPMAP flag. Reviewed-by: Robert Bragg <robert@linux.intel.com>
228 lines
8.6 KiB
C
228 lines
8.6 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) 2011 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*
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* 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(CLUTTER_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_TEXURE_2D_H
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#define __COGL_TEXURE_2D_H
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#include "cogl-context.h"
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#include <glib.h>
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G_BEGIN_DECLS
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/**
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* SECTION:cogl-texture-2d
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* @short_description: Functions for creating and manipulating 2D textures
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*
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* These functions allow low-level 2D textures to be allocated. These
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* differ from sliced textures for example which may internally be
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* made up of multiple 2D textures, or atlas textures where Cogl must
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* internally modify user texture coordinates before they can be used
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* by the GPU.
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*
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* You should be aware that many GPUs only support power of two sizes
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* for #CoglTexture2D textures. You can check support for non power of
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* two textures by checking for the %COGL_FEATURE_ID_TEXTURE_NPOT feature
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* via cogl_has_feature().
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*/
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typedef struct _CoglTexture2D CoglTexture2D;
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#define COGL_TEXTURE_2D(X) ((CoglTexture2D *)X)
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#define cogl_is_texture_2d cogl_is_texture_2d_EXP
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/**
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* cogl_is_texture_2d:
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* @object: A #CoglObject
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*
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* Gets whether the given object references an existing #CoglTexture2D
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* object.
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*
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* Return value: %TRUE if the object references a #CoglTexture2D,
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* %FALSE otherwise
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*/
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gboolean
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cogl_is_texture_2d (void *object);
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#define cogl_texture_2d_new_with_size cogl_texture_2d_new_with_size_EXP
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/**
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* cogl_texture_2d_new_with_size:
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* @ctx: A #CoglContext
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* @width: Width of the texture to allocate
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* @height: Height of the texture to allocate
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* @internal_format: The format of the texture
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* @error: A #GError for exceptions
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*
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* Allocates a low-level #CoglTexture2D texture that your GPU can
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* texture from directly. This is unlike sliced textures for example
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* which may be comprised of multiple internal textures, or atlas
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* textures where Cogl has to modify texture coordinates before they
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* may be used by the GPU.
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*
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* <note>Many GPUs only support power of two sizes for #CoglTexture2D
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* textures. You can check support for non power of two textures by
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* checking for the %COGL_FEATURE_ID_TEXTURE_NPOT feature via
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* cogl_has_feature().</note>
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*
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* Returns: A newly allocated #CoglTexture2D, or if the size is not
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* supported (because it is too large or a non-power-of-two
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* size that the hardware doesn't support) it will return
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* %NULL and set @error.
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*
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* Since: 2.0
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*/
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CoglTexture2D *
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cogl_texture_2d_new_with_size (CoglContext *ctx,
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int width,
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int height,
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CoglPixelFormat internal_format,
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GError **error);
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#define cogl_texture_2d_new_from_data cogl_texture_2d_new_from_data_EXP
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/**
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* cogl_texture_2d_new_from_data:
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* @ctx: A #CoglContext
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* @width: width of texture in pixels
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* @height: height of texture in pixels
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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_pipeline_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. A value of 0 will make Cogl automatically
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* calculate @rowstride from @width and @format.
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* @data: pointer the memory region where the source buffer resides
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* @error: A #GError for exceptions
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*
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* Creates a new #CoglTexture2D texture based on data residing in memory.
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* These are unlike sliced textures for example which may be comprised
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* of multiple internal textures, or atlas textures where Cogl has to
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* modify texture coordinates before they may be used by the GPU.
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*
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* <note>Many GPUs only support power of two sizes for #CoglTexture2D
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* textures. You can check support for non power of two textures by
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* checking for the %COGL_FEATURE_ID_TEXTURE_NPOT feature via
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* cogl_has_feature().</note>
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*
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* Returns: A newly allocated #CoglTexture2D, or if the size is not
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* supported (because it is too large or a non-power-of-two
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* size that the hardware doesn't support) it will return
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* %NULL and set @error.
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*
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* Since: 2.0
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*/
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CoglTexture2D *
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cogl_texture_2d_new_from_data (CoglContext *ctx,
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int width,
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int height,
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CoglPixelFormat format,
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CoglPixelFormat internal_format,
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int rowstride,
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const guint8 *data,
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GError **error);
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/**
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* cogl_texture_2d_new_from_bitmap:
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* @bitmap: A #CoglBitmap
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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_pipeline_set_blend()) or use the data for
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* something other than straight blending.
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* @error: A #GError for exceptions
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*
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* Creates a new #CoglTexture2D texture based on data residing in a
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* bitmap. These are unlike sliced textures for example which may be
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* comprised of multiple internal textures, or atlas textures where
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* Cogl has to modify texture coordinates before they may be used by
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* the GPU.
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*
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* <note>Many GPUs only support power of two sizes for #CoglTexture2D
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* textures. You can check support for non power of two textures by
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* checking for the %COGL_FEATURE_ID_TEXTURE_NPOT feature via
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* cogl_has_feature().</note>
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*
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* Returns: A newly allocated #CoglTexture2D, or if the size is not
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* supported (because it is too large or a non-power-of-two
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* size that the hardware doesn't support) it will return
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* %NULL and set @error.
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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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CoglTexture2D *
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cogl_texture_2d_new_from_bitmap (CoglBitmap *bitmap,
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CoglPixelFormat internal_format,
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GError **error);
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#define cogl_texture_2d_new_from_foreign cogl_texture_2d_new_from_foreign_EXP
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/**
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* cogl_texture_2d_new_from_foreign:
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* @ctx: A #CoglContext
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* @gl_handle: A GL handle for a GL_TEXTURE_2D 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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* @internal_format: The format of the texture
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* @error: A #GError for exceptions
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*
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* Wraps an existing GL_TEXTURE_2D texture object as a #CoglTexture2D.
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* This can be used for integrating Cogl with software using OpenGL
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* directly.
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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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* Returns: A newly allocated #CoglTexture2D, or if Cogl could not
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* validate the @gl_handle in some way (perhaps because of
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* an unsupported format) it will return %NULL and set
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* @error.
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*
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* Since: 2.0
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*/
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CoglTexture2D *
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cogl_texture_2d_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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GError **error);
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G_END_DECLS
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#endif /* __COGL_TEXURE_2D_H */
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