fb7f1a7fd6
GL supports setting different wrap modes for the s, t and r coordinates so we should design the backend interface to support that also. The r coordinate is not currently used by any of the backends but we might as well have it to make life easier if we ever add support for 3D textures. http://bugzilla.openedhand.com/show_bug.cgi?id=2063
102 lines
3.5 KiB
C
102 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) 2007,2008,2009 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_SLICED_H
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#define __COGL_TEXTURE_2D_SLICED_H
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#include "cogl-bitmap-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_2D_SLICED(tex) ((CoglTexture2DSliced *)tex)
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typedef struct _CoglTexture2DSliced CoglTexture2DSliced;
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typedef struct _CoglTexturePixel CoglTexturePixel;
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/* This is used to store the first pixel of each slice. This is only
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used when glGenerateMipmap is not available */
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struct _CoglTexturePixel
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{
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/* We need to store the format of the pixel because we store the
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data in the source format which might end up being different for
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each slice if a subregion is updated with a different format */
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GLenum gl_format;
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GLenum gl_type;
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guint8 data[4];
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};
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struct _CoglTexture2DSliced
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{
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CoglTexture _parent;
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GArray *slice_x_spans;
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GArray *slice_y_spans;
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GArray *slice_gl_handles;
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int max_waste;
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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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GLenum gl_target;
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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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gboolean is_foreign;
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GLenum wrap_mode_s;
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GLenum wrap_mode_t;
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gboolean auto_mipmap;
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gboolean mipmaps_dirty;
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/* This holds a copy of the first pixel in each slice. It is only
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used to force an automatic update of the mipmaps when
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glGenerateMipmap is not available. */
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CoglTexturePixel *first_pixels;
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};
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GQuark
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_cogl_handle_texture_2d_sliced_get_type (void);
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CoglHandle
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_cogl_texture_2d_sliced_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_sliced_new_from_foreign (GLuint gl_handle,
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GLenum gl_target,
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GLuint width,
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GLuint height,
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GLuint x_pot_waste,
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GLuint y_pot_waste,
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CoglPixelFormat format);
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CoglHandle
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_cogl_texture_2d_sliced_new_from_bitmap (CoglHandle bmp_handle,
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CoglTextureFlags flags,
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CoglPixelFormat internal_format);
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#endif /* __COGL_TEXTURE_2D_SLICED_H */
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