mutter/cogl/cogl-texture-2d-private.h
Robert Bragg 73e8a6d7ce Allow lazy texture storage allocation
Consistent with how we lazily allocate framebuffers this patch allows us
to instantiate textures but still specify constraints and requirements
before allocating storage so that we can be sure to allocate the most
appropriate/efficient storage.

This adds a cogl_texture_allocate() function that is analogous to
cogl_framebuffer_allocate() which can optionally be called to explicitly
allocate storage and catch any errors. If this function isn't used
explicitly then Cogl will implicitly ensure textures are allocated
before the storage is needed.

It is generally recommended to rely on lazy storage allocation or at
least perform explicit allocation as late as possible so Cogl can be
fully informed about the best way to allocate storage.

Reviewed-by: Neil Roberts <neil@linux.intel.com>

(cherry picked from commit 1fa7c0f10a8a03043e3c75cb079a49625df098b7)

Note: This reverts the cogl_texture_rectangle_new_with_size API change
that dropped the CoglError argument and keeps the semantics of
allocating the texture immediately. This is because Mutter currently
uses this API so we will probably look at updating this later once
we have a corresponding Mutter patch prepared. The other API changes
were kept since they only affected experimental api.
2013-01-22 17:48:17 +00:00

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4.0 KiB
C

/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2009 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*
*/
#ifndef __COGL_TEXTURE_2D_PRIVATE_H
#define __COGL_TEXTURE_2D_PRIVATE_H
#include "cogl-object-private.h"
#include "cogl-pipeline-private.h"
#include "cogl-texture-private.h"
#include "cogl-texture-2d.h"
#ifdef COGL_HAS_EGL_SUPPORT
#include "cogl-egl-defines.h"
#endif
struct _CoglTexture2D
{
CoglTexture _parent;
/* The internal format of the GL texture represented as a
CoglPixelFormat */
CoglPixelFormat internal_format;
CoglBool auto_mipmap;
CoglBool mipmaps_dirty;
CoglBool is_foreign;
/* TODO: factor out these OpenGL specific members into some form
* of driver private state. */
/* The internal format of the GL texture represented as a GL enum */
GLenum gl_internal_format;
/* The texture object number */
GLuint gl_texture;
GLenum gl_legacy_texobj_min_filter;
GLenum gl_legacy_texobj_mag_filter;
GLint gl_legacy_texobj_wrap_mode_s;
GLint gl_legacy_texobj_wrap_mode_t;
CoglTexturePixel first_pixel;
};
#if defined (COGL_HAS_EGL_SUPPORT) && defined (EGL_KHR_image_base)
/* NB: The reason we require the width, height and format to be passed
* even though they may seem redundant is because GLES 1/2 don't
* provide a way to query these properties. */
CoglTexture2D *
_cogl_egl_texture_2d_new_from_image (CoglContext *ctx,
int width,
int height,
CoglPixelFormat format,
EGLImageKHR image,
CoglError **error);
#endif
CoglTexture2D *
_cogl_texture_2d_create_base (CoglContext *ctx,
int width,
int height,
CoglPixelFormat internal_format);
void
_cogl_texture_2d_set_auto_mipmap (CoglTexture *tex,
CoglBool value);
/*
* _cogl_texture_2d_externally_modified:
* @texture: A #CoglTexture2D object
*
* This should be called whenever the texture is modified other than
* by using cogl_texture_set_region. It will cause the mipmaps to be
* invalidated
*/
void
_cogl_texture_2d_externally_modified (CoglTexture *texture);
/*
* _cogl_texture_2d_copy_from_framebuffer:
* @texture: A #CoglTexture2D pointer
* @src_x: X-position to within the framebuffer to read from
* @src_y: Y-position to within the framebuffer to read from
* @width: width of the rectangle to copy
* @height: height of the rectangle to copy
* @src_fb: A source #CoglFramebuffer to copy from
* @dst_x: X-position to store the image within the texture
* @dst_y: Y-position to store the image within the texture
* @level: The mipmap level of @texture to copy too
*
* This copies a portion of the given @src_fb into the
* texture.
*/
void
_cogl_texture_2d_copy_from_framebuffer (CoglTexture2D *texture,
int src_x,
int src_y,
int width,
int height,
CoglFramebuffer *src_fb,
int dst_x,
int dst_y,
int level);
#endif /* __COGL_TEXTURE_2D_PRIVATE_H */