1 /****************************************************************************
2 * Copyright (C) 2015 Intel Corporation. All Rights Reserved.
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 "swr_context.h"
25 #include "swr_query.h"
26
27 static void
swr_clear(struct pipe_context * pipe,unsigned buffers,const struct pipe_scissor_state * scissor_state,const union pipe_color_union * color,double depth,unsigned stencil)28 swr_clear(struct pipe_context *pipe,
29 unsigned buffers,
30 const struct pipe_scissor_state *scissor_state,
31 const union pipe_color_union *color,
32 double depth,
33 unsigned stencil)
34 {
35 struct swr_context *ctx = swr_context(pipe);
36 struct pipe_framebuffer_state *fb = &ctx->framebuffer;
37
38 UINT clearMask = 0;
39 unsigned layers = 0;
40
41 if (!swr_check_render_cond(pipe))
42 return;
43
44 swr_update_derived(pipe);
45
46 if (buffers & PIPE_CLEAR_COLOR && fb->nr_cbufs) {
47 for (unsigned i = 0; i < fb->nr_cbufs; ++i)
48 if (fb->cbufs[i] && (buffers & (PIPE_CLEAR_COLOR0 << i))) {
49 clearMask |= (SWR_ATTACHMENT_COLOR0_BIT << i);
50 layers = std::max(layers, fb->cbufs[i]->u.tex.last_layer -
51 fb->cbufs[i]->u.tex.first_layer + 1u);
52 }
53 }
54
55 if (buffers & PIPE_CLEAR_DEPTH && fb->zsbuf) {
56 clearMask |= SWR_ATTACHMENT_DEPTH_BIT;
57 layers = std::max(layers, fb->zsbuf->u.tex.last_layer -
58 fb->zsbuf->u.tex.first_layer + 1u);
59 }
60
61 if (buffers & PIPE_CLEAR_STENCIL && fb->zsbuf) {
62 clearMask |= SWR_ATTACHMENT_STENCIL_BIT;
63 layers = std::max(layers, fb->zsbuf->u.tex.last_layer -
64 fb->zsbuf->u.tex.first_layer + 1u);
65 }
66
67 #if 0 // XXX HACK, override clear color alpha. On ubuntu, clears are
68 // transparent.
69 ((union pipe_color_union *)color)->f[3] = 1.0; /* cast off your const'd-ness */
70 #endif
71
72 /*
73 * Always clear full surface. When GL_SCISSOR_TEST is enabled
74 * glClear is handled by state tracker and there is no need to do this here
75 */
76 SWR_RECT clear_rect = {0, 0, (int32_t)fb->width, (int32_t)fb->height};
77
78 for (unsigned i = 0; i < layers; ++i) {
79 swr_update_draw_context(ctx);
80 ctx->api.pfnSwrClearRenderTarget(ctx->swrContext, clearMask, i,
81 color->f, depth, stencil,
82 clear_rect);
83
84 // Mask out the attachments that are out of layers.
85 if (fb->zsbuf &&
86 (fb->zsbuf->u.tex.last_layer <= fb->zsbuf->u.tex.first_layer + i))
87 clearMask &= ~(SWR_ATTACHMENT_DEPTH_BIT | SWR_ATTACHMENT_STENCIL_BIT);
88 for (unsigned c = 0; c < fb->nr_cbufs; ++c) {
89 const struct pipe_surface *sf = fb->cbufs[c];
90 if (sf && (sf->u.tex.last_layer <= sf->u.tex.first_layer + i))
91 clearMask &= ~(SWR_ATTACHMENT_COLOR0_BIT << c);
92 }
93 }
94 }
95
96 void
swr_clear_init(struct pipe_context * pipe)97 swr_clear_init(struct pipe_context *pipe)
98 {
99 pipe->clear = swr_clear;
100 }
101