diff options
Diffstat (limited to 'src/gallium/auxiliary/indices/u_unfilled_indices.c')
| -rw-r--r-- | src/gallium/auxiliary/indices/u_unfilled_indices.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/indices/u_unfilled_indices.c b/src/gallium/auxiliary/indices/u_unfilled_indices.c new file mode 100644 index 0000000000..26c5d4d4c7 --- /dev/null +++ b/src/gallium/auxiliary/indices/u_unfilled_indices.c @@ -0,0 +1,186 @@ +/* + * Copyright 2009 VMware, Inc. + * 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 + * on 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 + * VMWARE AND/OR THEIR 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. + */ + +#include "u_indices.h" +#include "u_indices_priv.h" + + +static void translate_ubyte_ushort( const void *in, + unsigned nr, + void *out ) +{ + const ubyte *in_ub = (const ubyte *)in; + ushort *out_us = (ushort *)out; + unsigned i; + for (i = 0; i < nr; i++) + out_us[i] = (ushort) in_ub[i]; +} + +static void translate_memcpy_ushort( const void *in, + unsigned nr, + void *out ) +{ + memcpy(out, in, nr*sizeof(short)); +} + +static void translate_memcpy_uint( const void *in, + unsigned nr, + void *out ) +{ + memcpy(out, in, nr*sizeof(int)); +} + + +static void generate_linear_ushort( unsigned nr, + void *out ) +{ + ushort *out_us = (ushort *)out; + unsigned i; + for (i = 0; i < nr; i++) + out_us[i] = (ushort) i; +} + +static void generate_linear_uint( unsigned nr, + void *out ) +{ + unsigned *out_ui = (unsigned *)out; + unsigned i; + for (i = 0; i < nr; i++) + out_ui[i] = i; +} + + +static unsigned nr_lines( unsigned prim, + unsigned nr ) +{ + switch (prim) { + case PIPE_PRIM_TRIANGLES: + return (nr / 3) * 6; + case PIPE_PRIM_TRIANGLE_STRIP: + return (nr - 2) * 6; + case PIPE_PRIM_TRIANGLE_FAN: + return (nr - 2) * 6; + case PIPE_PRIM_QUADS: + return (nr / 4) * 8; + case PIPE_PRIM_QUAD_STRIP: + return (nr - 2) / 2 * 8; + case PIPE_PRIM_POLYGON: + return (nr - 2) * 6; + default: + assert(0); + return 0; + } +} + + + +int u_unfilled_translator( unsigned prim, + unsigned in_index_size, + unsigned nr, + unsigned unfilled_mode, + unsigned *out_prim, + unsigned *out_index_size, + unsigned *out_nr, + u_translate_func *out_translate ) +{ + unsigned in_idx; + unsigned out_idx; + + u_unfilled_init(); + + in_idx = in_size_idx(in_index_size); + *out_index_size = (in_index_size == 4) ? 4 : 2; + out_idx = out_size_idx(*out_index_size); + + if (unfilled_mode == PIPE_POLYGON_MODE_POINT) + { + *out_prim = PIPE_PRIM_POINTS; + *out_nr = nr; + + switch (in_index_size) + { + case 1: + *out_translate = translate_ubyte_ushort; + return U_TRANSLATE_NORMAL; + case 2: + *out_translate = translate_memcpy_uint; + return U_TRANSLATE_MEMCPY; + case 4: + *out_translate = translate_memcpy_ushort; + return U_TRANSLATE_MEMCPY; + default: + *out_translate = translate_memcpy_uint; + *out_nr = 0; + assert(0); + return U_TRANSLATE_ERROR; + } + } + else { + assert(unfilled_mode == PIPE_POLYGON_MODE_LINE); + *out_prim = PIPE_PRIM_LINES; + *out_translate = translate_line[in_idx][out_idx][prim]; + *out_nr = nr_lines( prim, nr ); + return U_TRANSLATE_NORMAL; + } +} + + + +int u_unfilled_generator( unsigned prim, + unsigned start, + unsigned nr, + unsigned unfilled_mode, + unsigned *out_prim, + unsigned *out_index_size, + unsigned *out_nr, + u_generate_func *out_generate ) +{ + unsigned out_idx; + + u_unfilled_init(); + + *out_index_size = ((start + nr) > 0xfffe) ? 4 : 2; + out_idx = out_size_idx(*out_index_size); + + if (unfilled_mode == PIPE_POLYGON_MODE_POINT) { + + if (*out_index_size == 4) + *out_generate = generate_linear_uint; + else + *out_generate = generate_linear_ushort; + + *out_prim = PIPE_PRIM_POINTS; + *out_nr = nr; + return U_GENERATE_LINEAR; + } + else { + assert(unfilled_mode == PIPE_POLYGON_MODE_LINE); + *out_prim = PIPE_PRIM_LINES; + *out_generate = generate_line[out_idx][prim]; + *out_nr = nr_lines( prim, nr ); + + return U_GENERATE_REUSABLE; + } +} + |