diff options
Diffstat (limited to 'src/mesa/pipe/softpipe/sp_tile_output.c')
-rw-r--r-- | src/mesa/pipe/softpipe/sp_tile_output.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/src/mesa/pipe/softpipe/sp_tile_output.c b/src/mesa/pipe/softpipe/sp_tile_output.c new file mode 100644 index 0000000000..b1eb9e8c9f --- /dev/null +++ b/src/mesa/pipe/softpipe/sp_tile_output.c @@ -0,0 +1,92 @@ +/* + * Mesa 3-D graphics library + * Version: 6.5 + * + * Copyright (C) 1999-2005 Brian Paul 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, sublicense, + * 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 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 NONINFRINGEMENT. IN NO EVENT SHALL + * BRIAN PAUL 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. + */ + +/* Vertices are just an array of floats, with all the attributes + * packed. We currently assume a layout like: + * + * attr[0][0..3] - window position + * attr[1..n][0..3] - remaining attributes. + * + * Attributes are assumed to be 4 floats wide but are packed so that + * all the enabled attributes run contiguously. + */ + +#include "glheader.h" +#include "sp_context.h" +#include "sp_headers.h" +#include "sp_surface.h" +#include "sp_tile.h" + + +static void mask_copy( GLfloat (*dest)[4], + GLfloat (*src)[4], + GLuint mask ) +{ + GLuint i, j; + + for (i = 0; i < 4; i++) { + if (mask & (1<<i)) { + for (j = 0; j < 4; j++) { + dest[j][i] = src[j][i]; + } + } + } +} + + +/* Write to the output, taking mask into account. + * + * Note that surfaces support only full quad reads and writes. + */ +void quad_output( struct softpipe_context *softpipe, + struct quad_header *quad ) +{ + + if (quad->mask != MASK_ALL) + { + GLfloat tmp[4][QUAD_SIZE]; + + /* Yes, we'll probably have a masked write as well, but this is + * how blend will be done at least. + */ + gs_read_quad_f_swz( softpipe->cbuf_surface, + quad->x0, + quad->y0, + tmp ); + + mask_copy( tmp, quad->outputs.color, quad->mask ); + + gs_write_quad_f_swz( softpipe->cbuf_surface, + quad->x0, + quad->y0, + tmp ); + } + else + { + gs_write_quad_f_swz( softpipe->cbuf_surface, + quad->x0, + quad->y0, + quad->outputs.color ); + } +} |