| /* |
| * Copyright © 2013 Intel Corporation |
| * |
| * 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 (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 NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS 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. |
| */ |
| |
| #ifndef BRW_MULTISAMPLE_STATE_H |
| #define BRW_MULTISAMPLE_STATE_H |
| |
| #include <stdint.h> |
| |
| /** |
| * Note: There are no standard multisample positions defined in OpenGL |
| * specifications. Implementations have the freedom to pick the positions |
| * which give plausible results. But the Vulkan specification does define |
| * standard sample positions. So, we decided to pick the same pattern in |
| * OpenGL as in Vulkan to keep it uniform across drivers and also to avoid |
| * breaking applications which rely on this standard pattern. |
| */ |
| |
| /** |
| * 1x MSAA has a single sample at the center: (0.5, 0.5) -> (0x8, 0x8). |
| * |
| * 2x MSAA sample positions are (0.25, 0.25) and (0.75, 0.75): |
| * 4 c |
| * 4 0 |
| * c 1 |
| */ |
| static const uint32_t |
| brw_multisample_positions_1x_2x = 0x0088cc44; |
| |
| /** |
| * Sample positions: |
| * 2 6 a e |
| * 2 0 |
| * 6 1 |
| * a 2 |
| * e 3 |
| */ |
| static const uint32_t |
| brw_multisample_positions_4x = 0xae2ae662; |
| |
| /** |
| * Sample positions: |
| * |
| * From the Ivy Bridge PRM, Vol2 Part1 p304 (3DSTATE_MULTISAMPLE: |
| * Programming Notes): |
| * "When programming the sample offsets (for NUMSAMPLES_4 or _8 and |
| * MSRASTMODE_xxx_PATTERN), the order of the samples 0 to 3 (or 7 |
| * for 8X) must have monotonically increasing distance from the |
| * pixel center. This is required to get the correct centroid |
| * computation in the device." |
| * |
| * Sample positions: |
| * 1 3 5 7 9 b d f |
| * 1 7 |
| * 3 3 |
| * 5 0 |
| * 7 5 |
| * 9 2 |
| * b 1 |
| * d 4 |
| * f 6 |
| */ |
| static const uint32_t |
| brw_multisample_positions_8x[] = { 0x53d97b95, 0xf1bf173d }; |
| |
| /** |
| * Sample positions: |
| * |
| * 0 1 2 3 4 5 6 7 8 9 a b c d e f |
| * 0 15 |
| * 1 9 |
| * 2 10 |
| * 3 7 |
| * 4 13 |
| * 5 1 |
| * 6 4 |
| * 7 3 |
| * 8 12 |
| * 9 0 |
| * a 2 |
| * b 6 |
| * c 11 |
| * d 5 |
| * e 8 |
| * f 14 |
| */ |
| static const uint32_t |
| brw_multisample_positions_16x[] = { |
| 0xc75a7599, 0xb3dbad36, 0x2c42816e, 0x10eff408 |
| }; |
| |
| #endif /* BRW_MULTISAMPLE_STATE_H */ |
