src/mesa/drivers/x11/xm_image.c

   1 /**************************************************************************
   2
   3 Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
   4 All Rights Reserved.
   5
   6 Permission is hereby granted, free of charge, to any person obtaining a
   7 copy of this software and associated documentation files (the
   8 "Software"), to deal in the Software without restriction, including
   9 without limitation the rights to use, copy, modify, merge, publish,
  10 distribute, sub license, and/or sell copies of the Software, and to
  11 permit persons to whom the Software is furnished to do so, subject to
  12 the following conditions:
  13
  14 The above copyright notice and this permission notice (including the
  15 next paragraph) shall be included in all copies or substantial portions
  16 of the Software.
  17
  18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21 IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
  22 ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25
  26 **************************************************************************/
  27
  28 /*
  29  * Authors:
  30  *   Kevin E. Martin <kevin@precisioninsight.com>
  31  *   Brian Paul <brian@precisioninsight.com>
  32  */
  33
  34 #ifdef HAVE_DIX_CONFIG_H
  35 #include <dix-config.h>
  36 #endif
  37
  38 #include <stdlib.h>
  39
  40 #include "xf86glx_util.h"
  41 #include <X11/Xmd.h>
  42
  43 #ifdef ROUNDUP
  44 #undef ROUNDUP
  45 #endif
  46
  47 #define ROUNDUP(nbytes, pad) ((((nbytes) + ((pad)-1)) / (pad)) * ((pad)>>3))
  48
  49 XMesaImage *XMesaCreateImage(int bitsPerPixel, int width, int height, char *data)
  50 {
  51     XMesaImage *image;
  52
  53     image = (XMesaImage *)xalloc(sizeof(XMesaImage));
  54
  55     if (image) {
  56         image->width = width;
  57         image->height = height;
  58         image->data = data;
  59         /* Always pad to 32 bits */
  60         image->bytes_per_line = ROUNDUP((bitsPerPixel * width), 32);
  61         image->bits_per_pixel = bitsPerPixel;
  62     }
  63
  64     return image;
  65 }
  66
  67 void XMesaDestroyImage(XMesaImage *image)
  68 {
  69     if (image->data)
  70         free(image->data);
  71     xfree(image);
  72 }
  73
  74 unsigned long XMesaGetPixel(XMesaImage *image, int x, int y)
  75 {
  76     CARD8  *row = (CARD8 *)(image->data + y*image->bytes_per_line);
  77     CARD8  *i8;
  78     CARD16 *i16;
  79     CARD32 *i32;
  80     switch (image->bits_per_pixel) {
  81     case 8:
  82         i8 = (CARD8 *)row;
  83         return i8[x];
  84         break;
  85     case 15:
  86     case 16:
  87         i16 = (CARD16 *)row;
  88         return i16[x];
  89         break;
  90     case 24: /* WARNING: architecture specific code */
  91         i8 = (CARD8 *)row;
  92         return (((CARD32)i8[x*3]) |
  93                 (((CARD32)i8[x*3+1])<<8) |
  94                 (((CARD32)i8[x*3+2])<<16));
  95         break;
  96     case 32:
  97         i32 = (CARD32 *)row;
  98         return i32[x];
  99         break;
 100     }
 101     return 0;
 102 }
 103
 104 #ifndef XMESA_USE_PUTPIXEL_MACRO
 105 void XMesaPutPixel(XMesaImage *image, int x, int y, unsigned long pixel)
 106 {
 107     CARD8  *row = (CARD8 *)(image->data + y*image->bytes_per_line);
 108     CARD8  *i8;
 109     CARD16 *i16;
 110     CARD32 *i32;
 111     switch (image->bits_per_pixel) {
 112     case 8:
 113         i8 = (CARD8 *)row;
 114         i8[x] = (CARD8)pixel;
 115         break;
 116     case 15:
 117     case 16:
 118         i16 = (CARD16 *)row;
 119         i16[x] = (CARD16)pixel;
 120         break;
 121     case 24: /* WARNING: architecture specific code */
 122         i8 = (CARD8 *)__row;
 123         i8[x*3]   = (CARD8)(p);
 124         i8[x*3+1] = (CARD8)(p>>8);
 125         i8[x*3+2] = (CARD8)(p>>16);
 126     case 32:
 127         i32 = (CARD32 *)row;
 128         i32[x] = (CARD32)pixel;
 129         break;
 130     }
 131 }
 132 #endif
 133
 134 void XMesaPutImageHelper(ScreenPtr display,
 135                          DrawablePtr d, GCPtr gc,
 136                          XMesaImage *image,
 137                          int src_x, int src_y,
 138                          int dest_x, int dest_y,
 139                          unsigned int width, unsigned int height)
 140 {
 141     /* NOT_DONE: Verify that the following works for all depths */
 142     char *src = (image->data +
 143                  src_y * image->bytes_per_line +
 144                  ((src_x * image->bits_per_pixel) >> 3));
 145
 146     ValidateGC(d, gc);
 147     (*gc->ops->PutImage)(d, gc, d->depth, dest_x, dest_y, width, height,
 148                          0, ZPixmap, src);
 149 }