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95 lines
3.1 KiB
C
95 lines
3.1 KiB
C
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/*
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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) 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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <strings.h>
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#include "cogl-internal.h"
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#include "cogl-context-private.h"
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#include "cogl-texture-gl-private.h"
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#include "cogl-util.h"
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static inline int
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calculate_alignment (int rowstride)
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{
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int alignment = 1 << (_cogl_util_ffs (rowstride) - 1);
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return MIN (alignment, 8);
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}
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void
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_cogl_texture_gl_prep_alignment_for_pixels_upload (CoglContext *ctx,
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int pixels_rowstride)
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{
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GE( ctx, glPixelStorei (GL_UNPACK_ALIGNMENT,
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calculate_alignment (pixels_rowstride)) );
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}
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void
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_cogl_texture_gl_prep_alignment_for_pixels_download (CoglContext *ctx,
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int bpp,
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int width,
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int rowstride)
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{
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int alignment;
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/* If no padding is needed then we can always use an alignment of 1.
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* We want to do this even though it is equivalent to the alignment
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* of the rowstride because the Intel driver in Mesa currently has
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* an optimisation when reading data into a PBO that only works if
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* the alignment is exactly 1.
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*
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* https://bugs.freedesktop.org/show_bug.cgi?id=46632
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*/
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if (rowstride == bpp * width)
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alignment = 1;
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else
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alignment = calculate_alignment (rowstride);
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GE( ctx, glPixelStorei (GL_PACK_ALIGNMENT, alignment) );
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}
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void
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_cogl_texture_gl_flush_legacy_texobj_wrap_modes (CoglTexture *texture,
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unsigned int wrap_mode_s,
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unsigned int wrap_mode_t,
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unsigned int wrap_mode_p)
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{
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texture->vtable->gl_flush_legacy_texobj_wrap_modes (texture,
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wrap_mode_s,
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wrap_mode_t,
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wrap_mode_p);
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}
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void
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_cogl_texture_gl_flush_legacy_texobj_filters (CoglTexture *texture,
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unsigned int min_filter,
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unsigned int mag_filter)
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{
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texture->vtable->gl_flush_legacy_texobj_filters (texture,
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min_filter, mag_filter);
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}
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