ae88bff329
The CoglTexture2DSliced backend has a fallback for when the framebuffer extension is missing so it's not possible to use glGenerateMipmap. This involves keeping a copy of the upper-left pixel of the tex image so that we can temporarily enable GL_GENERATE_MIPMAP on the texture object and do a sub texture update by reuploading the contents of the first pixel. This patch copies that mechanism to the 2D and 3D backends. The CoglTexturePixel structure which was previously internal to the sliced backend has been moved to cogl-texture-private.h so that it can be shared.
99 lines
3.5 KiB
C
99 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) 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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* Authors:
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* Neil Roberts <neil@linux.intel.com>
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*/
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#ifndef __COGL_TEXTURE_3D_PRIVATE_H
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#define __COGL_TEXTURE_3D_PRIVATE_H
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#include "cogl-handle.h"
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#include "cogl-material-private.h"
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#include "cogl-texture-private.h"
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#define COGL_TEXTURE_3D(tex) ((CoglTexture3D *) tex)
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typedef struct _CoglTexture3D CoglTexture3D;
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struct _CoglTexture3D
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{
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CoglTexture _parent;
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/* The internal format of the GL texture represented as a
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CoglPixelFormat */
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CoglPixelFormat format;
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/* The internal format of the GL texture represented as a GL enum */
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GLenum gl_format;
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/* The texture object number */
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GLuint gl_texture;
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int width;
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int height;
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int depth;
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GLenum min_filter;
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GLenum mag_filter;
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GLint wrap_mode_s;
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GLint wrap_mode_t;
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GLint wrap_mode_p;
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gboolean auto_mipmap;
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gboolean mipmaps_dirty;
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CoglTexturePixel first_pixel;
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};
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GQuark
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_cogl_handle_texture_3d_get_type (void);
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/*
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* cogl_texture_3d_new_from_bitmap:
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* @bmp_handle: A #CoglHandle to a bitmap.
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* @height: height of the texture in pixels.
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* @depth: depth of the 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 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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* @error: A GError return location.
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*
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* Creates a new 3D texture and initializes it with the images in
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* @bmp_handle. The images are assumed to be packed together after one
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* another in the increasing y axis. The height of individual image is
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* given as @height and the number of images is given in @depth. The
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* actual height of the bitmap can be larger than @height × @depth. In
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* this case it assumes there is padding between the images.
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*
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* Return value: the newly created texture or %COGL_INVALID_HANDLE if
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* there was an error.
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*/
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CoglHandle
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_cogl_texture_3d_new_from_bitmap (CoglHandle bmp_handle,
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unsigned int height,
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unsigned int depth,
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CoglTextureFlags flags,
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CoglPixelFormat internal_format,
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GError **error);
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#endif /* __COGL_TEXTURE_3D_PRIVATE_H */
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