diff options
Diffstat (limited to 'src/gallium/winsys/xlib/xm_image.c')
-rw-r--r-- | src/gallium/winsys/xlib/xm_image.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/src/gallium/winsys/xlib/xm_image.c b/src/gallium/winsys/xlib/xm_image.c new file mode 100644 index 0000000..087b4e4 --- /dev/null +++ b/src/gallium/winsys/xlib/xm_image.c @@ -0,0 +1,133 @@ +/************************************************************************** + +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 */ |