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).
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 GenRenderbuffers name into an actual struct
61 _mesa_GenRenderbuffers(1, &rbo
);
62 _mesa_BindRenderbuffer(GL_RENDERBUFFER
, rbo
);
64 rb
= ctx
->CurrentRenderbuffer
;
65 irb
= intel_renderbuffer(rb
);
67 rb
->Format
= mt
->format
;
68 rb
->_BaseFormat
= _mesa_get_format_base_format(mt
->format
);
70 /* Program takes care of msaa and mip-level access manually for stencil.
71 * The surface is also treated as Y-tiled instead of as W-tiled calling for
72 * twice the width and half the height in dimensions.
75 const unsigned halign_stencil
= 8;
78 rb
->Width
= ALIGN(mt
->total_width
, halign_stencil
) * 2;
79 rb
->Height
= (mt
->total_height
/ mt
->physical_depth0
) / 2;
82 rb
->NumSamples
= mt
->num_samples
;
83 rb
->Width
= mt
->logical_width0
;
84 rb
->Height
= mt
->logical_height0
;
85 irb
->mt_level
= level
;
88 irb
->mt_layer
= layer
;
90 intel_miptree_reference(&irb
->mt
, mt
);
96 * Implementation of up or downsampling for window-system MSAA miptrees.
99 brw_meta_updownsample(struct brw_context
*brw
,
100 struct intel_mipmap_tree
*src_mt
,
101 struct intel_mipmap_tree
*dst_mt
)
103 struct gl_context
*ctx
= &brw
->ctx
;
104 GLuint fbos
[2], src_rbo
, dst_rbo
, src_fbo
, dst_fbo
;
106 GLbitfield attachment
, blit_bit
;
108 if (_mesa_get_format_base_format(src_mt
->format
) == GL_DEPTH_COMPONENT
||
109 _mesa_get_format_base_format(src_mt
->format
) == GL_DEPTH_STENCIL
) {
110 attachment
= GL_DEPTH_ATTACHMENT
;
111 drawbuffer
= GL_NONE
;
112 blit_bit
= GL_DEPTH_BUFFER_BIT
;
114 attachment
= GL_COLOR_ATTACHMENT0
;
115 drawbuffer
= GL_COLOR_ATTACHMENT0
;
116 blit_bit
= GL_COLOR_BUFFER_BIT
;
119 brw_emit_mi_flush(brw
);
121 _mesa_meta_begin(ctx
, MESA_META_ALL
);
122 _mesa_GenFramebuffers(2, fbos
);
123 src_rbo
= brw_get_rb_for_slice(brw
, src_mt
, 0, 0, false);
124 dst_rbo
= brw_get_rb_for_slice(brw
, dst_mt
, 0, 0, false);
128 _mesa_BindFramebuffer(GL_READ_FRAMEBUFFER
, src_fbo
);
129 _mesa_FramebufferRenderbuffer(GL_READ_FRAMEBUFFER
, attachment
,
130 GL_RENDERBUFFER
, src_rbo
);
131 _mesa_ReadBuffer(drawbuffer
);
133 _mesa_BindFramebuffer(GL_DRAW_FRAMEBUFFER
, dst_fbo
);
134 _mesa_FramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER
, attachment
,
135 GL_RENDERBUFFER
, dst_rbo
);
136 _mesa_DrawBuffer(drawbuffer
);
138 _mesa_BlitFramebuffer(0, 0,
139 src_mt
->logical_width0
, src_mt
->logical_height0
,
141 dst_mt
->logical_width0
, dst_mt
->logical_height0
,
142 blit_bit
, GL_NEAREST
);
144 _mesa_DeleteRenderbuffers(1, &src_rbo
);
145 _mesa_DeleteRenderbuffers(1, &dst_rbo
);
146 _mesa_DeleteFramebuffers(2, fbos
);
150 brw_emit_mi_flush(brw
);