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| 4358 | Serge | 1 | /* |
| 2 | * Copyright © 2009 Intel Corporation |
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| 3 | * |
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| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 5 | * copy of this software and associated documentation files (the "Software"), |
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| 6 | * to deal in the Software without restriction, including without limitation |
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| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 9 | * Software is furnished to do so, subject to the following conditions: |
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| 10 | * |
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| 11 | * The above copyright notice and this permission notice (including the next |
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| 12 | * paragraph) shall be included in all copies or substantial portions of the |
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| 13 | * Software. |
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| 14 | * |
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| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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| 20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
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| 21 | * IN THE SOFTWARE. |
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| 22 | * |
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| 23 | * Authors: |
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| 24 | * Eric Anholt |
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| 25 | * |
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| 26 | */ |
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| 27 | |||
| 28 | #include "brw_context.h" |
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| 29 | #include "brw_state.h" |
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| 30 | #include "brw_defines.h" |
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| 31 | #include "brw_util.h" |
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| 32 | #include "intel_batchbuffer.h" |
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| 33 | #include "main/fbobject.h" |
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| 34 | |||
| 35 | static void |
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| 36 | upload_clip_state(struct brw_context *brw) |
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| 37 | { |
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| 38 | struct gl_context *ctx = &brw->ctx; |
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| 39 | uint32_t dw1 = brw->meta_in_progress ? 0 : GEN6_CLIP_STATISTICS_ENABLE; |
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| 40 | uint32_t dw2 = 0; |
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| 41 | |||
| 42 | /* _NEW_BUFFERS */ |
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| 43 | struct gl_framebuffer *fb = ctx->DrawBuffer; |
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| 44 | |||
| 45 | /* CACHE_NEW_WM_PROG */ |
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| 46 | if (brw->wm.prog_data->barycentric_interp_modes & |
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| 47 | BRW_WM_NONPERSPECTIVE_BARYCENTRIC_BITS) { |
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| 48 | dw2 |= GEN6_CLIP_NON_PERSPECTIVE_BARYCENTRIC_ENABLE; |
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| 49 | } |
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| 50 | |||
| 51 | if (!ctx->Transform.DepthClamp) |
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| 52 | dw2 |= GEN6_CLIP_Z_TEST; |
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| 53 | |||
| 54 | /* _NEW_LIGHT */ |
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| 55 | if (ctx->Light.ProvokingVertex == GL_FIRST_VERTEX_CONVENTION) { |
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| 56 | dw2 |= |
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| 57 | (0 << GEN6_CLIP_TRI_PROVOKE_SHIFT) | |
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| 58 | (1 << GEN6_CLIP_TRIFAN_PROVOKE_SHIFT) | |
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| 59 | (0 << GEN6_CLIP_LINE_PROVOKE_SHIFT); |
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| 60 | } else { |
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| 61 | dw2 |= |
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| 62 | (2 << GEN6_CLIP_TRI_PROVOKE_SHIFT) | |
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| 63 | (2 << GEN6_CLIP_TRIFAN_PROVOKE_SHIFT) | |
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| 64 | (1 << GEN6_CLIP_LINE_PROVOKE_SHIFT); |
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| 65 | } |
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| 66 | |||
| 67 | /* _NEW_TRANSFORM */ |
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| 68 | dw2 |= (ctx->Transform.ClipPlanesEnabled << |
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| 69 | GEN6_USER_CLIP_CLIP_DISTANCES_SHIFT); |
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| 70 | |||
| 71 | if (ctx->Viewport.X == 0 && |
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| 72 | ctx->Viewport.Y == 0 && |
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| 73 | ctx->Viewport.Width == fb->Width && |
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| 74 | ctx->Viewport.Height == fb->Height) { |
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| 75 | dw2 |= GEN6_CLIP_GB_TEST; |
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| 76 | } |
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| 77 | |||
| 78 | /* BRW_NEW_RASTERIZER_DISCARD */ |
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| 79 | if (ctx->RasterDiscard) { |
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| 80 | dw2 |= GEN6_CLIP_MODE_REJECT_ALL; |
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| 81 | perf_debug("Rasterizer discard is currently implemented via the clipper; " |
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| 82 | "having the GS not write primitives would likely be faster."); |
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| 83 | } |
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| 84 | |||
| 85 | BEGIN_BATCH(4); |
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| 86 | OUT_BATCH(_3DSTATE_CLIP << 16 | (4 - 2)); |
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| 87 | OUT_BATCH(dw1); |
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| 88 | OUT_BATCH(GEN6_CLIP_ENABLE | |
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| 89 | GEN6_CLIP_API_OGL | |
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| 90 | GEN6_CLIP_MODE_NORMAL | |
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| 91 | GEN6_CLIP_XY_TEST | |
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| 92 | dw2); |
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| 93 | OUT_BATCH(U_FIXED(0.125, 3) << GEN6_CLIP_MIN_POINT_WIDTH_SHIFT | |
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| 94 | U_FIXED(255.875, 3) << GEN6_CLIP_MAX_POINT_WIDTH_SHIFT | |
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| 95 | GEN6_CLIP_FORCE_ZERO_RTAINDEX); |
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| 96 | ADVANCE_BATCH(); |
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| 97 | } |
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| 98 | |||
| 99 | const struct brw_tracked_state gen6_clip_state = { |
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| 100 | .dirty = { |
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| 101 | .mesa = _NEW_TRANSFORM | _NEW_LIGHT | _NEW_BUFFERS, |
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| 102 | .brw = BRW_NEW_CONTEXT | |
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| 103 | BRW_NEW_META_IN_PROGRESS | |
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| 104 | BRW_NEW_RASTERIZER_DISCARD, |
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| 105 | .cache = CACHE_NEW_WM_PROG |
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| 106 | }, |
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| 107 | .emit = upload_clip_state, |
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| 108 | }; |