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d5fc61102f
It was inconsistent that we exposed the CoglBitmap struct instead of an opaque CoglHandle.
195 lines
4.7 KiB
C
195 lines
4.7 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, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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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 "cogl.h"
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#include "cogl-internal.h"
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#include "cogl-bitmap-private.h"
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#include <string.h>
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static void _cogl_bitmap_free (CoglBitmap *bmp);
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COGL_HANDLE_DEFINE (Bitmap, bitmap);
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static void
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_cogl_bitmap_free (CoglBitmap *bmp)
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{
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g_free (bmp->data);
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g_free (bmp);
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}
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gint
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_cogl_get_format_bpp (CoglPixelFormat format)
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{
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gint bpp_lut[] = {
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0, /* invalid */
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1, /* A_8 */
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3, /* 888 */
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4, /* 8888 */
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2, /* 565 */
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2, /* 4444 */
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2, /* 5551 */
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2, /* YUV */
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1 /* G_8 */
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};
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return bpp_lut [format & COGL_UNORDERED_MASK];
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}
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gboolean
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_cogl_bitmap_convert_and_premult (const CoglBitmap *bmp,
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CoglBitmap *dst_bmp,
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CoglPixelFormat dst_format)
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{
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CoglBitmap tmp_bmp = *bmp;
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CoglBitmap new_bmp = *bmp;
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gboolean new_bmp_owner = FALSE;
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/* Is base format different (not considering premult status)? */
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if ((bmp->format & COGL_UNPREMULT_MASK) !=
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(dst_format & COGL_UNPREMULT_MASK))
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{
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/* Try converting using imaging library */
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if (!_cogl_bitmap_convert (&new_bmp, &tmp_bmp, dst_format))
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{
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/* ... or try fallback */
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if (!_cogl_bitmap_fallback_convert (&new_bmp, &tmp_bmp, dst_format))
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return FALSE;
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}
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/* Update bitmap with new data */
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new_bmp = tmp_bmp;
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new_bmp_owner = TRUE;
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}
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/* Do we need to unpremultiply */
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if ((bmp->format & COGL_PREMULT_BIT) == 0 &&
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(dst_format & COGL_PREMULT_BIT) > 0)
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{
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/* Try unpremultiplying using imaging library */
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if (!_cogl_bitmap_unpremult (&new_bmp, &tmp_bmp))
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{
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/* ... or try fallback */
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if (!_cogl_bitmap_fallback_unpremult (&new_bmp, &tmp_bmp))
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{
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if (new_bmp_owner)
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g_free (new_bmp.data);
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return FALSE;
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}
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}
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/* Update bitmap with new data */
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if (new_bmp_owner)
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g_free (new_bmp.data);
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new_bmp = tmp_bmp;
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new_bmp_owner = TRUE;
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}
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/* Do we need to premultiply */
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if ((bmp->format & COGL_PREMULT_BIT) > 0 &&
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(dst_format & COGL_PREMULT_BIT) == 0)
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{
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/* FIXME: implement premultiplication */
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if (new_bmp_owner)
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g_free (new_bmp.data);
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return FALSE;
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}
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/* Output new bitmap info */
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*dst_bmp = new_bmp;
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return TRUE;
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}
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void
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_cogl_bitmap_copy_subregion (CoglBitmap *src,
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CoglBitmap *dst,
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gint src_x,
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gint src_y,
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gint dst_x,
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gint dst_y,
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gint width,
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gint height)
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{
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guchar *srcdata;
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guchar *dstdata;
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gint bpp;
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gint line;
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/* Intended only for fast copies when format is equal! */
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g_assert (src->format == dst->format);
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bpp = _cogl_get_format_bpp (src->format);
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srcdata = src->data + src_y * src->rowstride + src_x * bpp;
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dstdata = dst->data + dst_y * dst->rowstride + dst_x * bpp;
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for (line=0; line<height; ++line)
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{
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memcpy (dstdata, srcdata, width * bpp);
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srcdata += src->rowstride;
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dstdata += dst->rowstride;
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}
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}
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gboolean
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cogl_bitmap_get_size_from_file (const gchar *filename,
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gint *width,
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gint *height)
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{
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return _cogl_bitmap_get_size_from_file (filename, width, height);
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}
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CoglHandle
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cogl_bitmap_new_from_file (const gchar *filename,
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GError **error)
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{
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CoglBitmap bmp;
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CoglBitmap *ret;
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g_return_val_if_fail (error == NULL || *error == NULL, COGL_INVALID_HANDLE);
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/* Try loading with imaging backend */
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if (!_cogl_bitmap_from_file (&bmp, filename, error))
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{
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/* Try fallback */
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if (!_cogl_bitmap_fallback_from_file (&bmp, filename))
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return NULL;
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else if (error && *error)
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{
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g_error_free (*error);
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*error = NULL;
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}
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}
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ret = g_memdup (&bmp, sizeof (CoglBitmap));
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return _cogl_bitmap_handle_new (ret);
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}
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