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117 lines
3.1 KiB
C
117 lines
3.1 KiB
C
/*
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* $Id: icpixels.c,v 1.9 2005-06-25 03:13:19 jrmuizel Exp $
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*
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* Copyright © 1998 Keith Packard
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of Keith Packard not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. Keith Packard makes no
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* representations about the suitability of this software for any purpose. It
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* is provided "as is" without express or implied warranty.
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*
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* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "pixman-xserver-compat.h"
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static void
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FbPixelsInit (FbPixels *pixels, pixman_bits_t *buf, int width, int height, int depth, int bpp, int stride);
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static unsigned int
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pixman_bits_per_pixel (unsigned int depth);
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static unsigned int
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pixman_bits_per_pixel (unsigned int depth)
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{
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if (depth > 8)
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if (depth > 16)
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return 32;
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else
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return 16;
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else
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if (depth > 4)
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return 8;
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else if (depth > 1)
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return 4;
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else
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return 1;
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}
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FbPixels *
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FbPixelsCreate (int width, int height, int depth)
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{
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FbPixels *pixels;
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pixman_bits_t *buf;
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unsigned int buf_size;
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unsigned int bpp;
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unsigned int stride;
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unsigned int adjust;
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unsigned int base;
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bpp = pixman_bits_per_pixel (depth);
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stride = ((width * bpp + FB_MASK) >> FB_SHIFT) * sizeof (pixman_bits_t);
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buf_size = height * stride;
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base = sizeof (FbPixels);
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adjust = 0;
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if (base & 7)
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adjust = 8 - (base & 7);
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buf_size += adjust;
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pixels = malloc(base + buf_size);
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if (!pixels)
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return NULL;
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buf = (pixman_bits_t *) ((char *)pixels + base + adjust);
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FbPixelsInit (pixels, buf, width, height, depth, bpp, stride);
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return pixels;
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}
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FbPixels *
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FbPixelsCreateForData (pixman_bits_t *data, int width, int height, int depth, int bpp, int stride)
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{
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FbPixels *pixels;
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pixels = malloc (sizeof (FbPixels));
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if (pixels == NULL)
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return NULL;
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FbPixelsInit (pixels, data, width, height, depth, bpp, stride);
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return pixels;
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}
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static void
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FbPixelsInit (FbPixels *pixels, pixman_bits_t *buf, int width, int height, int depth, int bpp, int stride)
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{
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pixels->data = buf;
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pixels->width = width;
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pixels->height = height;
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pixels->depth = depth;
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pixels->bpp = bpp;
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pixels->stride = stride;
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pixels->x = 0;
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pixels->y = 0;
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pixels->refcnt = 1;
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}
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void
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FbPixelsDestroy (FbPixels *pixels)
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{
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if(--pixels->refcnt)
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return;
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free(pixels);
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}
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