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
30 static void
gen7_upload_sf_clip_viewport(struct brw_context * brw)31 gen7_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
75 const 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
upload_cc_viewport_state_pointer(struct brw_context * brw)86 static 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
96 const 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