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.
84 lines
2.4 KiB
C
84 lines
2.4 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 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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#ifndef __COGL_TEXTURE_2D_H
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#define __COGL_TEXTURE_2D_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_2D(tex) ((CoglTexture2D *) tex)
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typedef struct _CoglTexture2D CoglTexture2D;
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struct _CoglTexture2D
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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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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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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_2d_get_type (void);
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CoglHandle
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_cogl_texture_2d_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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CoglHandle
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_cogl_texture_2d_new_from_bitmap (CoglHandle bmp_handle,
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CoglTextureFlags flags,
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CoglPixelFormat internal_format);
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/*
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* _cogl_texture_2d_externally_modified:
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* @handle: A handle to a 2D texture
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*
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* This should be called whenever the texture is modified other than
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* by using cogl_texture_set_region. It will cause the mipmaps to be
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* invalidated
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*/
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void
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_cogl_texture_2d_externally_modified (CoglHandle handle);
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#endif /* __COGL_TEXTURE_2D_H */
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