| /* |
| * Copyright © 2009 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. |
| * |
| * Authors: |
| * Eric Anholt <eric@anholt.net> |
| * |
| */ |
| |
| #include "brw_context.h" |
| #include "brw_state.h" |
| #include "brw_defines.h" |
| #include "brw_util.h" |
| #include "intel_batchbuffer.h" |
| #include "main/fbobject.h" |
| #include "main/framebuffer.h" |
| |
| bool |
| brw_is_drawing_points(const struct brw_context *brw) |
| { |
| /* Determine if the primitives *reaching the SF* are points */ |
| /* _NEW_POLYGON */ |
| if (brw->ctx.Polygon.FrontMode == GL_POINT || |
| brw->ctx.Polygon.BackMode == GL_POINT) { |
| return true; |
| } |
| |
| if (brw->gs.base.prog_data) { |
| /* BRW_NEW_GS_PROG_DATA */ |
| return brw_gs_prog_data(brw->gs.base.prog_data)->output_topology == |
| _3DPRIM_POINTLIST; |
| } else if (brw->tes.base.prog_data) { |
| /* BRW_NEW_TES_PROG_DATA */ |
| return brw_tes_prog_data(brw->tes.base.prog_data)->output_topology == |
| BRW_TESS_OUTPUT_TOPOLOGY_POINT; |
| } else { |
| /* BRW_NEW_PRIMITIVE */ |
| return brw->primitive == _3DPRIM_POINTLIST; |
| } |
| } |
| |
| bool |
| brw_is_drawing_lines(const struct brw_context *brw) |
| { |
| /* Determine if the primitives *reaching the SF* are points */ |
| /* _NEW_POLYGON */ |
| if (brw->ctx.Polygon.FrontMode == GL_LINE || |
| brw->ctx.Polygon.BackMode == GL_LINE) { |
| return true; |
| } |
| |
| if (brw->gs.base.prog_data) { |
| /* BRW_NEW_GS_PROG_DATA */ |
| return brw_gs_prog_data(brw->gs.base.prog_data)->output_topology == |
| _3DPRIM_LINESTRIP; |
| } else if (brw->tes.base.prog_data) { |
| /* BRW_NEW_TES_PROG_DATA */ |
| return brw_tes_prog_data(brw->tes.base.prog_data)->output_topology == |
| BRW_TESS_OUTPUT_TOPOLOGY_LINE; |
| } else { |
| /* BRW_NEW_PRIMITIVE */ |
| switch (brw->primitive) { |
| case _3DPRIM_LINELIST: |
| case _3DPRIM_LINESTRIP: |
| case _3DPRIM_LINELOOP: |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| static void |
| upload_clip_state(struct brw_context *brw) |
| { |
| struct gl_context *ctx = &brw->ctx; |
| /* BRW_NEW_META_IN_PROGRESS */ |
| uint32_t dw1 = brw->meta_in_progress ? 0 : GEN6_CLIP_STATISTICS_ENABLE; |
| uint32_t dw2 = 0; |
| |
| /* _NEW_BUFFERS */ |
| struct gl_framebuffer *fb = ctx->DrawBuffer; |
| |
| /* BRW_NEW_FS_PROG_DATA */ |
| if (brw_wm_prog_data(brw->wm.base.prog_data)->barycentric_interp_modes & |
| BRW_BARYCENTRIC_NONPERSPECTIVE_BITS) { |
| dw2 |= GEN6_CLIP_NON_PERSPECTIVE_BARYCENTRIC_ENABLE; |
| } |
| |
| /* BRW_NEW_VS_PROG_DATA */ |
| dw1 |= brw_vue_prog_data(brw->vs.base.prog_data)->cull_distance_mask; |
| |
| if (brw->gen >= 7) |
| dw1 |= GEN7_CLIP_EARLY_CULL; |
| |
| if (brw->gen == 7) { |
| /* _NEW_POLYGON */ |
| if (ctx->Polygon._FrontBit == _mesa_is_user_fbo(fb)) |
| dw1 |= GEN7_CLIP_WINDING_CCW; |
| |
| if (ctx->Polygon.CullFlag) { |
| switch (ctx->Polygon.CullFaceMode) { |
| case GL_FRONT: |
| dw1 |= GEN7_CLIP_CULLMODE_FRONT; |
| break; |
| case GL_BACK: |
| dw1 |= GEN7_CLIP_CULLMODE_BACK; |
| break; |
| case GL_FRONT_AND_BACK: |
| dw1 |= GEN7_CLIP_CULLMODE_BOTH; |
| break; |
| default: |
| unreachable("Should not get here: invalid CullFlag"); |
| } |
| } else { |
| dw1 |= GEN7_CLIP_CULLMODE_NONE; |
| } |
| } |
| |
| if (brw->gen < 8 && !ctx->Transform.DepthClamp) |
| dw2 |= GEN6_CLIP_Z_TEST; |
| |
| /* _NEW_LIGHT */ |
| if (ctx->Light.ProvokingVertex == GL_FIRST_VERTEX_CONVENTION) { |
| dw2 |= |
| (0 << GEN6_CLIP_TRI_PROVOKE_SHIFT) | |
| (1 << GEN6_CLIP_TRIFAN_PROVOKE_SHIFT) | |
| (0 << GEN6_CLIP_LINE_PROVOKE_SHIFT); |
| } else { |
| dw2 |= |
| (2 << GEN6_CLIP_TRI_PROVOKE_SHIFT) | |
| (2 << GEN6_CLIP_TRIFAN_PROVOKE_SHIFT) | |
| (1 << GEN6_CLIP_LINE_PROVOKE_SHIFT); |
| } |
| |
| /* _NEW_TRANSFORM */ |
| dw2 |= (ctx->Transform.ClipPlanesEnabled << |
| GEN6_USER_CLIP_CLIP_DISTANCES_SHIFT); |
| |
| /* Have the hardware use the user clip distance clip test enable bitmask |
| * specified here in 3DSTATE_CLIP rather than the one in 3DSTATE_VS/DS/GS. |
| * We already listen to _NEW_TRANSFORM here, but the other atoms don't |
| * need to other than this. |
| */ |
| if (brw->gen >= 8) |
| dw1 |= GEN8_CLIP_FORCE_USER_CLIP_DISTANCE_BITMASK; |
| |
| if (ctx->Transform.ClipDepthMode == GL_ZERO_TO_ONE) |
| dw2 |= GEN6_CLIP_API_D3D; |
| else |
| dw2 |= GEN6_CLIP_API_OGL; |
| |
| dw2 |= GEN6_CLIP_GB_TEST; |
| |
| /* BRW_NEW_VIEWPORT_COUNT */ |
| const unsigned viewport_count = brw->clip.viewport_count; |
| |
| /* BRW_NEW_RASTERIZER_DISCARD */ |
| if (ctx->RasterDiscard) { |
| dw2 |= GEN6_CLIP_MODE_REJECT_ALL; |
| if (brw->gen == 6) { |
| perf_debug("Rasterizer discard is currently implemented via the " |
| "clipper; having the GS not write primitives would " |
| "likely be faster.\n"); |
| } |
| } |
| |
| uint32_t enable; |
| if (brw->primitive == _3DPRIM_RECTLIST) |
| enable = 0; |
| else |
| enable = GEN6_CLIP_ENABLE; |
| |
| /* _NEW_POLYGON, |
| * BRW_NEW_GEOMETRY_PROGRAM | BRW_NEW_TES_PROG_DATA | BRW_NEW_PRIMITIVE |
| */ |
| if (!brw_is_drawing_points(brw) && !brw_is_drawing_lines(brw)) |
| dw2 |= GEN6_CLIP_XY_TEST; |
| |
| BEGIN_BATCH(4); |
| OUT_BATCH(_3DSTATE_CLIP << 16 | (4 - 2)); |
| OUT_BATCH(dw1); |
| OUT_BATCH(enable | |
| GEN6_CLIP_MODE_NORMAL | |
| dw2); |
| OUT_BATCH(U_FIXED(0.125, 3) << GEN6_CLIP_MIN_POINT_WIDTH_SHIFT | |
| U_FIXED(255.875, 3) << GEN6_CLIP_MAX_POINT_WIDTH_SHIFT | |
| (_mesa_geometric_layers(fb) > 0 ? 0 : GEN6_CLIP_FORCE_ZERO_RTAINDEX) | |
| ((viewport_count - 1) & GEN6_CLIP_MAX_VP_INDEX_MASK)); |
| ADVANCE_BATCH(); |
| } |
| |
| const struct brw_tracked_state gen6_clip_state = { |
| .dirty = { |
| .mesa = _NEW_BUFFERS | |
| _NEW_LIGHT | |
| _NEW_POLYGON | |
| _NEW_TRANSFORM, |
| .brw = BRW_NEW_BLORP | |
| BRW_NEW_CONTEXT | |
| BRW_NEW_FS_PROG_DATA | |
| BRW_NEW_GS_PROG_DATA | |
| BRW_NEW_VS_PROG_DATA | |
| BRW_NEW_META_IN_PROGRESS | |
| BRW_NEW_PRIMITIVE | |
| BRW_NEW_RASTERIZER_DISCARD | |
| BRW_NEW_TES_PROG_DATA | |
| BRW_NEW_VIEWPORT_COUNT, |
| }, |
| .emit = upload_clip_state, |
| }; |
