| 0,0 → 1,151 |
|---|
| /* |
| * 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" |
| #include "main/viewport.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. |
| */ |
| static void |
| gen6_upload_clip_vp(struct brw_context *brw) |
| { |
| struct gl_context *ctx = &brw->ctx; |
| struct brw_clipper_viewport *vp; |
| |
| vp = brw_state_batch(brw, AUB_TRACE_CLIP_VP_STATE, |
| sizeof(*vp) * ctx->Const.MaxViewports, 32, &brw->clip.vp_offset); |
| |
| for (unsigned i = 0; i < ctx->Const.MaxViewports; i++) { |
| /* According to the "Vertex X,Y Clamping and Quantization" section of the |
| * Strips and Fans documentation, objects must not have a screen-space |
| * extents of over 8192 pixels, or they may be mis-rasterized. The maximum |
| * screen space coordinates of a small object may larger, but we have no |
| * way to enforce the object size other than through clipping. |
| * |
| * If you're surprised that we set clip to -gbx to +gbx and it seems like |
| * we'll end up with 16384 wide, note that for a 8192-wide render target, |
| * we'll end up with a normal (-1, 1) clip volume that just covers the |
| * drawable. |
| */ |
| const float maximum_post_clamp_delta = 8192; |
| float gbx = maximum_post_clamp_delta / ctx->ViewportArray[i].Width; |
| float gby = maximum_post_clamp_delta / ctx->ViewportArray[i].Height; |
| |
| vp[i].xmin = -gbx; |
| vp[i].xmax = gbx; |
| vp[i].ymin = -gby; |
| vp[i].ymax = gby; |
| } |
| |
| brw->ctx.NewDriverState |= BRW_NEW_CLIP_VP; |
| } |
| |
| const struct brw_tracked_state gen6_clip_vp = { |
| .dirty = { |
| .mesa = _NEW_VIEWPORT, |
| .brw = BRW_NEW_BATCH, |
| }, |
| .emit = gen6_upload_clip_vp, |
| }; |
| |
| static void |
| gen6_upload_sf_vp(struct brw_context *brw) |
| { |
| struct gl_context *ctx = &brw->ctx; |
| struct gen6_sf_viewport *sfv; |
| GLfloat y_scale, y_bias; |
| const bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer); |
| |
| sfv = brw_state_batch(brw, AUB_TRACE_SF_VP_STATE, |
| sizeof(*sfv) * ctx->Const.MaxViewports, |
| 32, &brw->sf.vp_offset); |
| memset(sfv, 0, sizeof(*sfv) * ctx->Const.MaxViewports); |
| |
| /* _NEW_BUFFERS */ |
| if (render_to_fbo) { |
| y_scale = 1.0; |
| y_bias = 0; |
| } else { |
| y_scale = -1.0; |
| y_bias = ctx->DrawBuffer->Height; |
| } |
| |
| for (unsigned i = 0; i < ctx->Const.MaxViewports; i++) { |
| double scale[3], translate[3]; |
| |
| /* _NEW_VIEWPORT */ |
| _mesa_get_viewport_xform(ctx, i, scale, translate); |
| sfv[i].m00 = scale[0]; |
| sfv[i].m11 = scale[1] * y_scale; |
| sfv[i].m22 = scale[2]; |
| sfv[i].m30 = translate[0]; |
| sfv[i].m31 = translate[1] * y_scale + y_bias; |
| sfv[i].m32 = translate[2]; |
| |
| } |
| |
| brw->ctx.NewDriverState |= BRW_NEW_SF_VP; |
| } |
| |
| const struct brw_tracked_state gen6_sf_vp = { |
| .dirty = { |
| .mesa = _NEW_BUFFERS | |
| _NEW_VIEWPORT, |
| .brw = BRW_NEW_BATCH, |
| }, |
| .emit = gen6_upload_sf_vp, |
| }; |
| |
| static void upload_viewport_state_pointers(struct brw_context *brw) |
| { |
| 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_CC_VP | |
| BRW_NEW_CLIP_VP | |
| BRW_NEW_SF_VP | |
| BRW_NEW_STATE_BASE_ADDRESS, |
| }, |
| .emit = upload_viewport_state_pointers, |
| }; |