2 * Copyright © 2011 Intel Corporation
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:
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
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
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24 #include "brw_context.h"
25 #include "brw_state.h"
26 #include "brw_defines.h"
27 #include "intel_batchbuffer.h"
30 prepare_sf_clip_viewport(struct brw_context *brw)
32 struct gl_context *ctx = &brw->intel.ctx;
33 const GLfloat depth_scale = 1.0F / ctx->DrawBuffer->_DepthMaxF;
34 GLfloat y_scale, y_bias;
35 const GLboolean render_to_fbo = (ctx->DrawBuffer->Name != 0);
36 const GLfloat *v = ctx->Viewport._WindowMap.m;
37 struct gen7_sf_clip_viewport *vp;
39 vp = brw_state_batch(brw, sizeof(vp), 64, &brw->sf.vp_offset);
40 /* Also assign to clip.vp_offset in case something uses it. */
41 brw->clip.vp_offset = brw->sf.vp_offset;
43 /* Disable guardband clipping (see gen6_viewport_state.c for rationale). */
44 vp->guardband.xmin = -1.0;
45 vp->guardband.xmax = 1.0;
46 vp->guardband.ymin = -1.0;
47 vp->guardband.ymax = 1.0;
55 y_bias = ctx->DrawBuffer->Height;
59 vp->viewport.m00 = v[MAT_SX];
60 vp->viewport.m11 = v[MAT_SY] * y_scale;
61 vp->viewport.m22 = v[MAT_SZ] * depth_scale;
62 vp->viewport.m30 = v[MAT_TX];
63 vp->viewport.m31 = v[MAT_TY] * y_scale + y_bias;
64 vp->viewport.m32 = v[MAT_TZ] * depth_scale;
67 static void upload_sf_clip_viewport_state_pointer(struct brw_context *brw)
69 struct intel_context *intel = &brw->intel;
72 OUT_BATCH(_3DSTATE_VIEWPORT_STATE_POINTERS_SF_CL << 16 | (2 - 2));
73 OUT_BATCH(brw->sf.vp_offset);
77 const struct brw_tracked_state gen7_sf_clip_viewport = {
79 .mesa = _NEW_VIEWPORT | _NEW_BUFFERS,
83 .prepare = prepare_sf_clip_viewport,
84 .emit = upload_sf_clip_viewport_state_pointer,
87 /* ----------------------------------------------------- */
89 static void upload_cc_viewport_state_pointer(struct brw_context *brw)
91 struct intel_context *intel = &brw->intel;
94 OUT_BATCH(_3DSTATE_VIEWPORT_STATE_POINTERS_CC << 16 | (2 - 2));
95 OUT_BATCH(brw->cc.vp_offset);
99 const struct brw_tracked_state gen7_cc_viewport_state_pointer = {
102 .brw = BRW_NEW_BATCH,
103 .cache = CACHE_NEW_CC_VP
105 .emit = upload_cc_viewport_state_pointer,