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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4358 | Serge | 1 | /************************************************************************** |
| 2 | * |
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| 3 | * Copyright 2010 VMware, Inc. |
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| 4 | * All Rights Reserved. |
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| 5 | * |
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| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 7 | * copy of this software and associated documentation files (the |
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| 8 | * "Software"), to deal in the Software without restriction, including |
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| 9 | * without limitation the rights to use, copy, modify, merge, publish, |
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| 10 | * distribute, sub license, and/or sell copies of the Software, and to |
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| 11 | * permit persons to whom the Software is furnished to do so, subject to |
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| 12 | * the following conditions: |
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| 13 | * |
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| 14 | * The above copyright notice and this permission notice (including the |
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| 15 | * next paragraph) shall be included in all copies or substantial portions |
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| 16 | * of the Software. |
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| 17 | * |
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| 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 19 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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| 20 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
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| 21 | * IN NO EVENT SHALL THE AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR |
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| 22 | * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
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| 23 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
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| 24 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 25 | * |
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| 26 | **************************************************************************/ |
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| 27 | |||
| 28 | |||
| 29 | #include "st_context.h" |
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| 30 | #include "pipe/p_context.h" |
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| 31 | #include "st_atom.h" |
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| 32 | |||
| 33 | #include "cso_cache/cso_context.h" |
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| 34 | |||
| 35 | |||
| 36 | /* Second state atom for user clip planes: |
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| 37 | */ |
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| 38 | static void update_sample_mask( struct st_context *st ) |
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| 39 | { |
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| 40 | unsigned sample_mask = 0xffffffff; |
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| 41 | unsigned sample_count = 1; |
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| 42 | struct pipe_framebuffer_state *framebuffer = &st->state.framebuffer; |
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| 43 | |||
| 44 | /* dependency here on bound surface (or rather, sample count) is worrying */ |
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| 45 | if (framebuffer->zsbuf) |
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| 46 | sample_count = framebuffer->zsbuf->texture->nr_samples; |
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| 47 | else if (framebuffer->cbufs[0]) |
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| 48 | sample_count = framebuffer->cbufs[0]->texture->nr_samples; |
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| 49 | |||
| 50 | if (st->ctx->Multisample.Enabled && sample_count > 1) { |
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| 51 | /* unlike in gallium/d3d10 the mask is only active if msaa is enabled */ |
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| 52 | if (st->ctx->Multisample.SampleCoverage) { |
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| 53 | unsigned nr_bits; |
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| 54 | nr_bits = (unsigned) |
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| 55 | (st->ctx->Multisample.SampleCoverageValue * (float)sample_count); |
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| 56 | /* there's lot of ways how to do this. We just use first few bits, |
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| 57 | since we have no knowledge of sample positions here. When |
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| 58 | app-supplied mask though is used too might need to be smarter. |
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| 59 | Also, there's a interface restriction here in theory it is |
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| 60 | encouraged this mask not be the same at each pixel. */ |
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| 61 | sample_mask = (1 << nr_bits) - 1; |
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| 62 | if (st->ctx->Multisample.SampleCoverageInvert) |
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| 63 | sample_mask = ~sample_mask; |
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| 64 | } |
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| 65 | if (st->ctx->Multisample.SampleMask) |
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| 66 | sample_mask &= st->ctx->Multisample.SampleMaskValue; |
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| 67 | } |
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| 68 | |||
| 69 | /* mask off unused bits or don't care? */ |
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| 70 | |||
| 71 | if (sample_mask != st->state.sample_mask) { |
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| 72 | st->state.sample_mask = sample_mask; |
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| 73 | cso_set_sample_mask(st->cso_context, sample_mask); |
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| 74 | } |
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| 75 | } |
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| 76 | |||
| 77 | |||
| 78 | const struct st_tracked_state st_update_msaa = { |
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| 79 | "st_update_msaa", /* name */ |
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| 80 | { /* dirty */ |
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| 81 | (_NEW_MULTISAMPLE | _NEW_BUFFERS), /* mesa */ |
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| 82 | ST_NEW_FRAMEBUFFER, /* st */ |
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| 83 | }, |
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| 84 | update_sample_mask /* update */ |
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| 85 | }; |