cbd6951134
This introduces the internal idea of texture loaders that track the
state for loading and allocating a texture. This defers a lot more work
until the texture is allocated.
There are several intentions to this change:
- provides a means for extending how textures are allocated without
requiring all the parameters to be supplied in a single _texture_new()
function call.
- allow us to remove the internal_format argument from all
_texture_new() apis since using CoglPixelFormat is bad way of
expressing the internal format constraints because it is too specific.
For now the internal_format arguments haven't actually been removed
but this patch does introduce replacement apis for controlling the
internal format:
cogl_texture_set_components() lets you specify what components your
texture needs when it is allocated.
cogl_texture_set_premultiplied() lets you specify whether a texture
data should be interpreted as premultiplied or not.
- Enable us to support asynchronous texture loading + allocation in the
future.
Of note, the _new_from_data() texture constructors all continue to
allocate textures immediately so that existing code doesn't need to be
adapted to manage the lifetime of the data being uploaded.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 6a83de9ef4210f380a31f410797447b365a8d02c)
Note: Compared to the original patch, the ->premultipled state for
textures isn't forced to be %TRUE in _cogl_texture_init since that
effectively ignores the users explicitly given internal_format which was
a mistake and on master that change should have been made in the patch
that followed. The gtk-doc comments for cogl_texture_set_premultiplied()
and cogl_texture_set_components() have also been updated in-line with
this fix.
126 lines
3.5 KiB
C
126 lines
3.5 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) 2009,2010,2011,2012 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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* Authors:
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* Neil Roberts <neil@linux.intel.com>
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* Robert Bragg <robert@linux.intel.com>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include "cogl-private.h"
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#include "cogl-texture-2d-nop-private.h"
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#include "cogl-texture-2d-private.h"
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#include "cogl-error-private.h"
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void
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_cogl_texture_2d_nop_free (CoglTexture2D *tex_2d)
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{
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}
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CoglBool
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_cogl_texture_2d_nop_can_create (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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{
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return TRUE;
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}
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void
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_cogl_texture_2d_nop_init (CoglTexture2D *tex_2d)
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{
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}
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CoglBool
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_cogl_texture_2d_nop_allocate (CoglTexture *tex,
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CoglError **error)
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{
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return TRUE;
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}
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void
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_cogl_texture_2d_nop_flush_legacy_texobj_filters (CoglTexture *tex,
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GLenum min_filter,
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GLenum mag_filter)
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{
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}
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void
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_cogl_texture_2d_nop_flush_legacy_texobj_wrap_modes (CoglTexture *tex,
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GLenum wrap_mode_s,
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GLenum wrap_mode_t,
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GLenum wrap_mode_p)
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{
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}
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void
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_cogl_texture_2d_nop_copy_from_framebuffer (CoglTexture2D *tex_2d,
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int src_x,
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int src_y,
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int width,
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int height,
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CoglFramebuffer *src_fb,
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int dst_x,
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int dst_y,
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int level)
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{
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}
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unsigned int
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_cogl_texture_2d_nop_get_gl_handle (CoglTexture2D *tex_2d)
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{
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return 0;
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}
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void
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_cogl_texture_2d_nop_generate_mipmap (CoglTexture2D *tex_2d)
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{
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}
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CoglBool
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_cogl_texture_2d_nop_copy_from_bitmap (CoglTexture2D *tex_2d,
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int src_x,
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int src_y,
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int width,
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int height,
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CoglBitmap *bitmap,
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int dst_x,
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int dst_y,
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int level,
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CoglError **error)
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{
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return TRUE;
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}
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void
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_cogl_texture_2d_nop_get_data (CoglTexture2D *tex_2d,
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CoglPixelFormat format,
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size_t rowstride,
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uint8_t *data)
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{
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}
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