148 lines
3.9 KiB
C
148 lines
3.9 KiB
C
/* $XFree86: xc/programs/Xserver/GL/mesa/src/X/xf86glx_util.c,v 1.5 2000/03/02 16:07:39 martin Exp $ */
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/**************************************************************************
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Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
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All Rights Reserved.
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sub license, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice (including the
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next paragraph) shall be included in all copies or substantial portions
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of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
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ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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**************************************************************************/
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/*
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* Authors:
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* Kevin E. Martin <kevin@precisioninsight.com>
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* Brian Paul <brian@precisioninsight.com>
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*/
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#include <gcstruct.h>
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#include "pixmapstr.h"
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#include "xf86glx_util.h"
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#include <X11/Xmd.h>
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#include "GL/xf86glx.h"
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#ifdef ROUNDUP
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#undef ROUNDUP
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#endif
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#define ROUNDUP(nbytes, pad) ((((nbytes) + ((pad)-1)) / (pad)) * ((pad)>>3))
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XMesaImage *XMesaCreateImage(int bitsPerPixel, int width, int height, char *data)
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{
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XMesaImage *image;
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image = (XMesaImage *)xalloc(sizeof(XMesaImage));
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if (image) {
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image->width = width;
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image->height = height;
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image->data = data;
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/* Always pad to 32 bits */
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image->bytes_per_line = ROUNDUP((bitsPerPixel * width), 32);
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image->bits_per_pixel = bitsPerPixel;
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}
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return image;
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}
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void XMesaDestroyImage(XMesaImage *image)
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{
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if (image->data)
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free(image->data);
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xfree(image);
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}
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unsigned long XMesaGetPixel(XMesaImage *image, int x, int y)
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{
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CARD8 *row = (CARD8 *)(image->data + y*image->bytes_per_line);
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CARD8 *i8;
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CARD16 *i16;
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CARD32 *i32;
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switch (image->bits_per_pixel) {
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case 8:
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i8 = (CARD8 *)row;
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return i8[x];
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break;
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case 15:
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case 16:
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i16 = (CARD16 *)row;
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return i16[x];
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break;
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case 24: /* WARNING: architecture specific code */
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i8 = (CARD8 *)row;
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return (((CARD32)i8[x*3]) |
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(((CARD32)i8[x*3+1])<<8) |
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(((CARD32)i8[x*3+2])<<16));
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break;
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case 32:
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i32 = (CARD32 *)row;
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return i32[x];
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break;
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}
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return 0;
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}
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#ifndef XMESA_USE_PUTPIXEL_MACRO
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void XMesaPutPixel(XMesaImage *image, int x, int y, unsigned long pixel)
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{
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CARD8 *row = (CARD8 *)(image->data + y*image->bytes_per_line);
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CARD8 *i8;
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CARD16 *i16;
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CARD32 *i32;
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switch (image->bits_per_pixel) {
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case 8:
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i8 = (CARD8 *)row;
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i8[x] = (CARD8)pixel;
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break;
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case 15:
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case 16:
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i16 = (CARD16 *)row;
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i16[x] = (CARD16)pixel;
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break;
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case 24: /* WARNING: architecture specific code */
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i8 = (CARD8 *)__row;
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i8[x*3] = (CARD8)(p);
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i8[x*3+1] = (CARD8)(p>>8);
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i8[x*3+2] = (CARD8)(p>>16);
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case 32:
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i32 = (CARD32 *)row;
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i32[x] = (CARD32)pixel;
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break;
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}
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}
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#endif
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void XMesaPutImageHelper(ScreenPtr display,
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DrawablePtr d, GCPtr gc,
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XMesaImage *image,
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int src_x, int src_y,
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int dest_x, int dest_y,
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unsigned int width, unsigned int height)
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{
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/* NOT_DONE: Verify that the following works for all depths */
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char *src = (image->data +
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src_y * image->bytes_per_line +
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((src_x * image->bits_per_pixel) >> 3));
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ValidateGC(d, gc);
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(*gc->ops->PutImage)(d, gc, d->depth, dest_x, dest_y, width, height,
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0, ZPixmap, src);
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}
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