1/*
2 * Copyright © 2011 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 */
23
24#include "brw_context.h"
25#include "brw_state.h"
26#include "brw_defines.h"
27#include "intel_batchbuffer.h"
28#include "main/fbobject.h"
29
30static void
31gen7_upload_sf_clip_viewport(struct brw_context *brw)
32{
33   struct intel_context *intel = &brw->intel;
34   struct gl_context *ctx = &intel->ctx;
35   const GLfloat depth_scale = 1.0F / ctx->DrawBuffer->_DepthMaxF;
36   GLfloat y_scale, y_bias;
37   const bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer);
38   const GLfloat *v = ctx->Viewport._WindowMap.m;
39   struct gen7_sf_clip_viewport *vp;
40
41   vp = brw_state_batch(brw, AUB_TRACE_SF_VP_STATE,
42			sizeof(*vp), 64, &brw->sf.vp_offset);
43   /* Also assign to clip.vp_offset in case something uses it. */
44   brw->clip.vp_offset = brw->sf.vp_offset;
45
46   /* Disable guardband clipping (see gen6_viewport_state.c for rationale). */
47   vp->guardband.xmin = -1.0;
48   vp->guardband.xmax = 1.0;
49   vp->guardband.ymin = -1.0;
50   vp->guardband.ymax = 1.0;
51
52   /* _NEW_BUFFERS */
53   if (render_to_fbo) {
54      y_scale = 1.0;
55      y_bias = 0;
56   } else {
57      y_scale = -1.0;
58      y_bias = ctx->DrawBuffer->Height;
59   }
60
61   /* _NEW_VIEWPORT */
62   vp->viewport.m00 = v[MAT_SX];
63   vp->viewport.m11 = v[MAT_SY] * y_scale;
64   vp->viewport.m22 = v[MAT_SZ] * depth_scale;
65   vp->viewport.m30 = v[MAT_TX];
66   vp->viewport.m31 = v[MAT_TY] * y_scale + y_bias;
67   vp->viewport.m32 = v[MAT_TZ] * depth_scale;
68
69   BEGIN_BATCH(2);
70   OUT_BATCH(_3DSTATE_VIEWPORT_STATE_POINTERS_SF_CL << 16 | (2 - 2));
71   OUT_BATCH(brw->sf.vp_offset);
72   ADVANCE_BATCH();
73}
74
75const struct brw_tracked_state gen7_sf_clip_viewport = {
76   .dirty = {
77      .mesa = _NEW_VIEWPORT | _NEW_BUFFERS,
78      .brw = BRW_NEW_BATCH,
79      .cache = 0,
80   },
81   .emit = gen7_upload_sf_clip_viewport,
82};
83
84/* ----------------------------------------------------- */
85
86static void upload_cc_viewport_state_pointer(struct brw_context *brw)
87{
88   struct intel_context *intel = &brw->intel;
89
90   BEGIN_BATCH(2);
91   OUT_BATCH(_3DSTATE_VIEWPORT_STATE_POINTERS_CC << 16 | (2 - 2));
92   OUT_BATCH(brw->cc.vp_offset);
93   ADVANCE_BATCH();
94}
95
96const struct brw_tracked_state gen7_cc_viewport_state_pointer = {
97   .dirty = {
98      .mesa = 0,
99      .brw = BRW_NEW_BATCH,
100      .cache = CACHE_NEW_CC_VP
101   },
102   .emit = upload_cc_viewport_state_pointer,
103};
104