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
27static void
28swr_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
96void
97swr_clear_init(struct pipe_context *pipe)
98{
99   pipe->clear = swr_clear;
100}
101