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 #include "main/framebuffer.h"
30 #include "main/viewport.h"
31
32 static void
gen7_upload_sf_clip_viewport(struct brw_context * brw)33 gen7_upload_sf_clip_viewport(struct brw_context *brw)
34 {
35 struct gl_context *ctx = &brw->ctx;
36 const struct gen_device_info *devinfo = &brw->screen->devinfo;
37 GLfloat y_scale, y_bias;
38 struct gen7_sf_clip_viewport *vp;
39
40 /* BRW_NEW_VIEWPORT_COUNT */
41 const unsigned viewport_count = brw->clip.viewport_count;
42
43 /* _NEW_BUFFERS */
44 struct gl_framebuffer *fb = ctx->DrawBuffer;
45 const bool render_to_fbo = _mesa_is_user_fbo(fb);
46 const uint32_t fb_width = _mesa_geometric_width(ctx->DrawBuffer);
47 const uint32_t fb_height = _mesa_geometric_height(ctx->DrawBuffer);
48
49 vp = brw_state_batch(brw, AUB_TRACE_SF_VP_STATE,
50 sizeof(*vp) * viewport_count, 64,
51 &brw->sf.vp_offset);
52 /* Also assign to clip.vp_offset in case something uses it. */
53 brw->clip.vp_offset = brw->sf.vp_offset;
54
55 /* _NEW_BUFFERS */
56 if (render_to_fbo) {
57 y_scale = 1.0;
58 y_bias = 0.0;
59 } else {
60 y_scale = -1.0;
61 y_bias = (float)fb_height;
62 }
63
64 for (unsigned i = 0; i < viewport_count; i++) {
65 float scale[3], translate[3];
66 _mesa_get_viewport_xform(ctx, i, scale, translate);
67
68 /* _NEW_VIEWPORT */
69 vp[i].viewport.m00 = scale[0];
70 vp[i].viewport.m11 = scale[1] * y_scale;
71 vp[i].viewport.m22 = scale[2];
72 vp[i].viewport.m30 = translate[0];
73 vp[i].viewport.m31 = translate[1] * y_scale + y_bias;
74 vp[i].viewport.m32 = translate[2];
75
76 brw_calculate_guardband_size(devinfo, fb_width, fb_height,
77 vp[i].viewport.m00, vp[i].viewport.m11,
78 vp[i].viewport.m30, vp[i].viewport.m31,
79 &vp[i].guardband.xmin,
80 &vp[i].guardband.xmax,
81 &vp[i].guardband.ymin,
82 &vp[i].guardband.ymax);
83 }
84
85 BEGIN_BATCH(2);
86 OUT_BATCH(_3DSTATE_VIEWPORT_STATE_POINTERS_SF_CL << 16 | (2 - 2));
87 OUT_BATCH(brw->sf.vp_offset);
88 ADVANCE_BATCH();
89 }
90
91 const struct brw_tracked_state gen7_sf_clip_viewport = {
92 .dirty = {
93 .mesa = _NEW_BUFFERS |
94 _NEW_VIEWPORT,
95 .brw = BRW_NEW_BATCH |
96 BRW_NEW_BLORP |
97 BRW_NEW_VIEWPORT_COUNT,
98 },
99 .emit = gen7_upload_sf_clip_viewport,
100 };
101