2 * Copyright © 2014 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
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
24 #include "brw_context.h"
25 #include "intel_batchbuffer.h"
26 #include "intel_fbo.h"
28 #include "main/blit.h"
29 #include "main/buffers.h"
30 #include "main/enums.h"
31 #include "main/fbobject.h"
33 #include "drivers/common/meta.h"
36 * @file brw_meta_updownsample.c
38 * Implements upsampling and downsampling of miptrees for window system
43 * Creates a new named renderbuffer that wraps the first slice
44 * of an existing miptree.
46 * Clobbers the current renderbuffer binding (ctx->CurrentRenderbuffer).
48 struct gl_renderbuffer *
49 brw_get_rb_for_slice(struct brw_context *brw,
50 struct intel_mipmap_tree *mt,
51 unsigned level, unsigned layer, bool flat)
53 struct gl_context *ctx = &brw->ctx;
55 struct gl_renderbuffer *rb;
56 struct intel_renderbuffer *irb;
58 /* This turns the CreateRenderbuffers name into an actual struct
61 _mesa_CreateRenderbuffers(1, &rbo);
63 rb = _mesa_lookup_renderbuffer(ctx, rbo);
64 irb = intel_renderbuffer(rb);
66 rb->Format = mt->format;
67 rb->_BaseFormat = _mesa_get_format_base_format(mt->format);
69 /* Program takes care of msaa and mip-level access manually for stencil.
70 * The surface is also treated as Y-tiled instead of as W-tiled calling for
71 * twice the width and half the height in dimensions.
74 const unsigned halign_stencil = 8;
77 rb->Width = ALIGN(mt->total_width, halign_stencil) * 2;
78 rb->Height = (mt->total_height / mt->physical_depth0) / 2;
81 rb->NumSamples = mt->num_samples;
82 rb->Width = mt->logical_width0;
83 rb->Height = mt->logical_height0;
84 irb->mt_level = level;
87 irb->mt_layer = layer;
89 intel_miptree_reference(&irb->mt, mt);
95 * Implementation of up or downsampling for window-system MSAA miptrees.
98 brw_meta_updownsample(struct brw_context *brw,
99 struct intel_mipmap_tree *src_mt,
100 struct intel_mipmap_tree *dst_mt)
102 struct gl_context *ctx = &brw->ctx;
103 GLuint fbos[2], src_fbo, dst_fbo;
104 struct gl_renderbuffer *src_rb;
105 struct gl_renderbuffer *dst_rb;
107 GLbitfield attachment, blit_bit;
109 if (_mesa_get_format_base_format(src_mt->format) == GL_DEPTH_COMPONENT ||
110 _mesa_get_format_base_format(src_mt->format) == GL_DEPTH_STENCIL) {
111 attachment = GL_DEPTH_ATTACHMENT;
112 drawbuffer = GL_NONE;
113 blit_bit = GL_DEPTH_BUFFER_BIT;
115 attachment = GL_COLOR_ATTACHMENT0;
116 drawbuffer = GL_COLOR_ATTACHMENT0;
117 blit_bit = GL_COLOR_BUFFER_BIT;
120 brw_emit_mi_flush(brw);
122 _mesa_meta_begin(ctx, MESA_META_ALL);
123 _mesa_GenFramebuffers(2, fbos);
124 src_rb = brw_get_rb_for_slice(brw, src_mt, 0, 0, false);
125 dst_rb = brw_get_rb_for_slice(brw, dst_mt, 0, 0, false);
129 _mesa_BindFramebuffer(GL_READ_FRAMEBUFFER, src_fbo);
130 _mesa_framebuffer_renderbuffer(ctx, ctx->ReadBuffer, attachment, src_rb);
131 _mesa_ReadBuffer(drawbuffer);
133 _mesa_BindFramebuffer(GL_DRAW_FRAMEBUFFER, dst_fbo);
134 _mesa_framebuffer_renderbuffer(ctx, ctx->DrawBuffer, attachment, dst_rb);
135 _mesa_DrawBuffer(drawbuffer);
137 _mesa_BlitFramebuffer(0, 0,
138 src_mt->logical_width0, src_mt->logical_height0,
140 dst_mt->logical_width0, dst_mt->logical_height0,
141 blit_bit, GL_NEAREST);
143 _mesa_DeleteRenderbuffers(1, &src_rb->Name);
144 _mesa_DeleteRenderbuffers(1, &dst_rb->Name);
145 _mesa_DeleteFramebuffers(2, fbos);
149 brw_emit_mi_flush(brw);