pan_sfbd.c revision b8e80941 
1/*
2 * Copyright 2018-2019 Alyssa Rosenzweig
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 FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 *
23 */
24
25#include "pan_context.h"
26#include "pan_util.h"
27#include "pan_format.h"
28
29#include "util/u_format.h"
30
31static unsigned
32panfrost_sfbd_format(struct pipe_surface *surf)
33{
34        /* TODO */
35        return 0xb84e0281; /* RGB32, no MSAA */
36}
37
38static void
39panfrost_sfbd_clear(
40                struct panfrost_job *job,
41                struct mali_single_framebuffer *sfbd)
42{
43        struct panfrost_context *ctx = job->ctx;
44
45        if (job->clear & PIPE_CLEAR_COLOR) {
46                sfbd->clear_color_1 = job->clear_color;
47                sfbd->clear_color_2 = job->clear_color;
48                sfbd->clear_color_3 = job->clear_color;
49                sfbd->clear_color_4 = job->clear_color;
50        }
51
52        if (job->clear & PIPE_CLEAR_DEPTH) {
53                sfbd->clear_depth_1 = job->clear_depth;
54                sfbd->clear_depth_2 = job->clear_depth;
55                sfbd->clear_depth_3 = job->clear_depth;
56                sfbd->clear_depth_4 = job->clear_depth;
57
58                sfbd->depth_buffer = ctx->depth_stencil_buffer.gpu;
59                sfbd->depth_buffer_enable = MALI_DEPTH_STENCIL_ENABLE;
60        }
61
62        if (job->clear & PIPE_CLEAR_STENCIL) {
63                sfbd->clear_stencil = job->clear_stencil;
64
65                sfbd->stencil_buffer = ctx->depth_stencil_buffer.gpu;
66                sfbd->stencil_buffer_enable = MALI_DEPTH_STENCIL_ENABLE;
67        }
68
69        /* Set flags based on what has been cleared, for the SFBD case */
70        /* XXX: What do these flags mean? */
71        int clear_flags = 0x101100;
72
73        if (!(job->clear & ~(PIPE_CLEAR_COLOR | PIPE_CLEAR_DEPTH | PIPE_CLEAR_STENCIL))) {
74                /* On a tiler like this, it's fastest to clear all three buffers at once */
75
76                clear_flags |= MALI_CLEAR_FAST;
77        } else {
78                clear_flags |= MALI_CLEAR_SLOW;
79
80                if (job->clear & PIPE_CLEAR_STENCIL)
81                        clear_flags |= MALI_CLEAR_SLOW_STENCIL;
82        }
83
84        sfbd->clear_flags = clear_flags;
85}
86
87static void
88panfrost_sfbd_set_cbuf(
89                struct mali_single_framebuffer *fb,
90                struct pipe_surface *surf,
91                bool flip_y)
92{
93        struct panfrost_resource *rsrc = pan_resource(surf->texture);
94
95        signed stride = rsrc->bo->slices[0].stride;
96
97        fb->format = panfrost_sfbd_format(surf);
98
99        if (rsrc->bo->layout == PAN_LINEAR) {
100                mali_ptr framebuffer = rsrc->bo->gpu;
101
102                /* The default is upside down from OpenGL's perspective. */
103                if (flip_y) {
104                        framebuffer += stride * (surf->texture->height0 - 1);
105                        stride = -stride;
106                }
107
108                fb->framebuffer = framebuffer;
109                fb->stride = stride;
110        } else {
111                fprintf(stderr, "Invalid render layout\n");
112                assert(0);
113        }
114}
115
116/* Creates an SFBD for the FRAGMENT section of the bound framebuffer */
117
118mali_ptr
119panfrost_sfbd_fragment(struct panfrost_context *ctx, bool flip_y)
120{
121        struct panfrost_job *job = panfrost_get_job_for_fbo(ctx);
122        struct mali_single_framebuffer fb = panfrost_emit_sfbd(ctx);
123
124        panfrost_sfbd_clear(job, &fb);
125
126        /* SFBD does not support MRT natively; sanity check */
127        assert(ctx->pipe_framebuffer.nr_cbufs == 1);
128        panfrost_sfbd_set_cbuf(&fb, ctx->pipe_framebuffer.cbufs[0], flip_y);
129
130        if (ctx->pipe_framebuffer.zsbuf) {
131                /* TODO */
132        }
133
134        if (job->requirements & PAN_REQ_MSAA)
135                fb.format |= MALI_FRAMEBUFFER_MSAA_A | MALI_FRAMEBUFFER_MSAA_B;
136
137        return panfrost_upload_transient(ctx, &fb, sizeof(fb)) | MALI_SFBD;
138}
139