/* * Copyright © 2011 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. */ #include "brw_context.h" #include "brw_state.h" #include "brw_defines.h" #include "brw_util.h" #include "intel_batchbuffer.h" #include "main/fbobject.h" static void upload_clip_state(struct brw_context *brw) { struct intel_context *intel = &brw->intel; struct gl_context *ctx = &intel->ctx; uint32_t dw1 = 0, dw2 = 0; /* _NEW_BUFFERS */ struct gl_framebuffer *fb = ctx->DrawBuffer; bool render_to_fbo = _mesa_is_user_fbo(fb); /* BRW_NEW_META_IN_PROGRESS */ if (!brw->meta_in_progress) dw1 |= GEN6_CLIP_STATISTICS_ENABLE; /* CACHE_NEW_WM_PROG */ if (brw->wm.prog_data->barycentric_interp_modes & BRW_WM_NONPERSPECTIVE_BARYCENTRIC_BITS) { dw2 |= GEN6_CLIP_NON_PERSPECTIVE_BARYCENTRIC_ENABLE; } dw1 |= GEN7_CLIP_EARLY_CULL; /* _NEW_POLYGON */ if ((ctx->Polygon.FrontFace == GL_CCW) ^ render_to_fbo) 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: assert(!"Should not get here: invalid CullFlag"); break; } } else { dw1 |= GEN7_CLIP_CULLMODE_NONE; } /* _NEW_TRANSFORM */ if (!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); if (ctx->Viewport.X == 0 && ctx->Viewport.Y == 0 && ctx->Viewport.Width == fb->Width && ctx->Viewport.Height == fb->Height) { dw2 |= GEN6_CLIP_GB_TEST; } /* BRW_NEW_RASTERIZER_DISCARD */ if (ctx->RasterDiscard) { dw2 |= GEN6_CLIP_MODE_REJECT_ALL; perf_debug("Rasterizer discard is currently implemented via the clipper; " "using the SOL unit may be faster."); } BEGIN_BATCH(4); OUT_BATCH(_3DSTATE_CLIP << 16 | (4 - 2)); OUT_BATCH(dw1); OUT_BATCH(GEN6_CLIP_ENABLE | GEN6_CLIP_API_OGL | GEN6_CLIP_MODE_NORMAL | GEN6_CLIP_XY_TEST | 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 | GEN6_CLIP_FORCE_ZERO_RTAINDEX); ADVANCE_BATCH(); } const struct brw_tracked_state gen7_clip_state = { .dirty = { .mesa = (_NEW_BUFFERS | _NEW_POLYGON | _NEW_LIGHT | _NEW_TRANSFORM), .brw = BRW_NEW_CONTEXT | BRW_NEW_META_IN_PROGRESS | BRW_NEW_RASTERIZER_DISCARD, .cache = CACHE_NEW_WM_PROG }, .emit = upload_clip_state, };