| /************************************************************************** |
| |
| Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas. |
| All Rights Reserved. |
| |
| Permission is hereby granted, free of charge, to any person obtaining a |
| copy of this software and associated documentation files (the |
| "Software"), to deal in the Software without restriction, including |
| without limitation the rights to use, copy, modify, merge, publish, |
| distribute, sub license, and/or sell copies of the Software, and to |
| permit persons to whom the Software is furnished to do so, subject to |
| the following conditions: |
| |
| The above copyright notice and this permission notice (including the |
| next paragraph) shall be included in all copies or substantial portions |
| of the Software. |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
| IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR |
| ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| |
| **************************************************************************/ |
| |
| /* |
| * Authors: |
| * Kevin E. Martin <kevin@precisioninsight.com> |
| * Brian Paul <brian@precisioninsight.com> |
| */ |
| |
| #include <stdlib.h> |
| #include <X11/Xmd.h> |
| |
| #include "glxheader.h" |
| #include "xmesaP.h" |
| |
| #ifdef XFree86Server |
| |
| #ifdef ROUNDUP |
| #undef ROUNDUP |
| #endif |
| |
| #define ROUNDUP(nbytes, pad) ((((nbytes) + ((pad)-1)) / (pad)) * ((pad)>>3)) |
| |
| XMesaImage *XMesaCreateImage(int bitsPerPixel, int width, int height, char *data) |
| { |
| XMesaImage *image; |
| |
| image = (XMesaImage *)xalloc(sizeof(XMesaImage)); |
| |
| if (image) { |
| image->width = width; |
| image->height = height; |
| image->data = data; |
| /* Always pad to 32 bits */ |
| image->bytes_per_line = ROUNDUP((bitsPerPixel * width), 32); |
| image->bits_per_pixel = bitsPerPixel; |
| } |
| |
| return image; |
| } |
| |
| void XMesaDestroyImage(XMesaImage *image) |
| { |
| if (image->data) |
| free(image->data); |
| xfree(image); |
| } |
| |
| unsigned long XMesaGetPixel(XMesaImage *image, int x, int y) |
| { |
| CARD8 *row = (CARD8 *)(image->data + y*image->bytes_per_line); |
| CARD8 *i8; |
| CARD16 *i16; |
| CARD32 *i32; |
| switch (image->bits_per_pixel) { |
| case 8: |
| i8 = (CARD8 *)row; |
| return i8[x]; |
| break; |
| case 15: |
| case 16: |
| i16 = (CARD16 *)row; |
| return i16[x]; |
| break; |
| case 24: /* WARNING: architecture specific code */ |
| i8 = (CARD8 *)row; |
| return (((CARD32)i8[x*3]) | |
| (((CARD32)i8[x*3+1])<<8) | |
| (((CARD32)i8[x*3+2])<<16)); |
| break; |
| case 32: |
| i32 = (CARD32 *)row; |
| return i32[x]; |
| break; |
| } |
| return 0; |
| } |
| |
| #ifndef XMESA_USE_PUTPIXEL_MACRO |
| void XMesaPutPixel(XMesaImage *image, int x, int y, unsigned long pixel) |
| { |
| CARD8 *row = (CARD8 *)(image->data + y*image->bytes_per_line); |
| CARD8 *i8; |
| CARD16 *i16; |
| CARD32 *i32; |
| switch (image->bits_per_pixel) { |
| case 8: |
| i8 = (CARD8 *)row; |
| i8[x] = (CARD8)pixel; |
| break; |
| case 15: |
| case 16: |
| i16 = (CARD16 *)row; |
| i16[x] = (CARD16)pixel; |
| break; |
| case 24: /* WARNING: architecture specific code */ |
| i8 = (CARD8 *)__row; |
| i8[x*3] = (CARD8)(p); |
| i8[x*3+1] = (CARD8)(p>>8); |
| i8[x*3+2] = (CARD8)(p>>16); |
| case 32: |
| i32 = (CARD32 *)row; |
| i32[x] = (CARD32)pixel; |
| break; |
| } |
| } |
| #endif |
| |
| #endif /* XFree86Server */ |