| /* |
| * 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 "intel_batchbuffer.h" |
| #include "main/fbobject.h" |
| |
| /* The clip VP defines the guardband region where expensive clipping is skipped |
| * and fragments are allowed to be generated and clipped out cheaply by the SF. |
| * |
| * By setting it to NDC bounds of [-1,1], we don't do GB clipping. It's |
| * supposed to cause seams to become visible in apps due to shared edges taking |
| * different clip/no clip paths depending on whether the rest of the prim ends |
| * up in the guardband or not. |
| */ |
| static void |
| gen6_upload_clip_vp(struct brw_context *brw) |
| { |
| struct brw_clipper_viewport *vp; |
| |
| vp = brw_state_batch(brw, AUB_TRACE_CLIP_VP_STATE, |
| sizeof(*vp), 32, &brw->clip.vp_offset); |
| |
| vp->xmin = -1.0; |
| vp->xmax = 1.0; |
| vp->ymin = -1.0; |
| vp->ymax = 1.0; |
| |
| brw->state.dirty.cache |= CACHE_NEW_CLIP_VP; |
| } |
| |
| const struct brw_tracked_state gen6_clip_vp = { |
| .dirty = { |
| .mesa = 0, |
| .brw = BRW_NEW_BATCH, |
| .cache = 0, |
| }, |
| .emit = gen6_upload_clip_vp, |
| }; |
| |
| static void |
| gen6_upload_sf_vp(struct brw_context *brw) |
| { |
| struct gl_context *ctx = &brw->intel.ctx; |
| const GLfloat depth_scale = 1.0F / ctx->DrawBuffer->_DepthMaxF; |
| struct brw_sf_viewport *sfv; |
| GLfloat y_scale, y_bias; |
| const bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer); |
| const GLfloat *v = ctx->Viewport._WindowMap.m; |
| |
| sfv = brw_state_batch(brw, AUB_TRACE_SF_VP_STATE, |
| sizeof(*sfv), 32, &brw->sf.vp_offset); |
| memset(sfv, 0, sizeof(*sfv)); |
| |
| /* _NEW_BUFFERS */ |
| if (render_to_fbo) { |
| y_scale = 1.0; |
| y_bias = 0; |
| } else { |
| y_scale = -1.0; |
| y_bias = ctx->DrawBuffer->Height; |
| } |
| |
| /* _NEW_VIEWPORT */ |
| sfv->viewport.m00 = v[MAT_SX]; |
| sfv->viewport.m11 = v[MAT_SY] * y_scale; |
| sfv->viewport.m22 = v[MAT_SZ] * depth_scale; |
| sfv->viewport.m30 = v[MAT_TX]; |
| sfv->viewport.m31 = v[MAT_TY] * y_scale + y_bias; |
| sfv->viewport.m32 = v[MAT_TZ] * depth_scale; |
| |
| brw->state.dirty.cache |= CACHE_NEW_SF_VP; |
| } |
| |
| const struct brw_tracked_state gen6_sf_vp = { |
| .dirty = { |
| .mesa = _NEW_VIEWPORT | _NEW_BUFFERS, |
| .brw = BRW_NEW_BATCH, |
| .cache = 0, |
| }, |
| .emit = gen6_upload_sf_vp, |
| }; |
| |
| static void upload_viewport_state_pointers(struct brw_context *brw) |
| { |
| struct intel_context *intel = &brw->intel; |
| |
| BEGIN_BATCH(4); |
| OUT_BATCH(_3DSTATE_VIEWPORT_STATE_POINTERS << 16 | (4 - 2) | |
| GEN6_CC_VIEWPORT_MODIFY | |
| GEN6_SF_VIEWPORT_MODIFY | |
| GEN6_CLIP_VIEWPORT_MODIFY); |
| OUT_BATCH(brw->clip.vp_offset); |
| OUT_BATCH(brw->sf.vp_offset); |
| OUT_BATCH(brw->cc.vp_offset); |
| ADVANCE_BATCH(); |
| } |
| |
| const struct brw_tracked_state gen6_viewport_state = { |
| .dirty = { |
| .mesa = 0, |
| .brw = (BRW_NEW_BATCH | |
| BRW_NEW_STATE_BASE_ADDRESS), |
| .cache = (CACHE_NEW_CLIP_VP | |
| CACHE_NEW_SF_VP | |
| CACHE_NEW_CC_VP) |
| }, |
| .emit = upload_viewport_state_pointers, |
| }; |