1 /**************************************************************************
3 * Copyright 2007 VMware, Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
30 * Keith Whitwell <keithw@vmware.com>
36 #include "st_context.h"
38 #include "st_cb_bitmap.h"
39 #include "st_cb_fbo.h"
40 #include "st_texture.h"
41 #include "pipe/p_context.h"
42 #include "cso_cache/cso_context.h"
43 #include "util/u_math.h"
44 #include "util/u_inlines.h"
45 #include "util/u_format.h"
46 #include "main/framebuffer.h"
50 * Update framebuffer size.
52 * We need to derive pipe_framebuffer size from the bound pipe_surfaces here
53 * instead of copying gl_framebuffer size because for certain target types
54 * (like PIPE_TEXTURE_1D_ARRAY) gl_framebuffer::Height has the number of layers
58 update_framebuffer_size(struct pipe_framebuffer_state
*framebuffer
,
59 struct pipe_surface
*surface
)
62 assert(surface
->width
< UINT_MAX
);
63 assert(surface
->height
< UINT_MAX
);
64 framebuffer
->width
= MIN2(framebuffer
->width
, surface
->width
);
65 framebuffer
->height
= MIN2(framebuffer
->height
, surface
->height
);
69 * Round up the requested multisample count to the next supported sample size.
72 framebuffer_quantize_num_samples(struct st_context
*st
, unsigned num_samples
)
74 struct pipe_screen
*screen
= st
->pipe
->screen
;
75 int quantized_samples
= 0;
81 /* Assumes the highest supported MSAA is a power of 2 */
82 msaa_mode
= util_next_power_of_two(st
->ctx
->Const
.MaxFramebufferSamples
);
83 assert(!(num_samples
> msaa_mode
)); /* be safe from infinite loops */
86 * Check if the MSAA mode that is higher than the requested
87 * num_samples is supported, and if so returning it.
89 for (; msaa_mode
>= num_samples
; msaa_mode
= msaa_mode
/ 2) {
91 * For ARB_framebuffer_no_attachment, A format of
92 * PIPE_FORMAT_NONE implies what number of samples is
93 * supported for a framebuffer with no attachment. Thus the
94 * drivers callback must be adjusted for this.
96 if (screen
->is_format_supported(screen
, PIPE_FORMAT_NONE
,
97 PIPE_TEXTURE_2D
, msaa_mode
,
98 PIPE_BIND_RENDER_TARGET
))
99 quantized_samples
= msaa_mode
;
101 return quantized_samples
;
105 * Update framebuffer state (color, depth, stencil, etc. buffers)
108 update_framebuffer_state( struct st_context
*st
)
110 struct pipe_framebuffer_state
*framebuffer
= &st
->state
.framebuffer
;
111 struct gl_framebuffer
*fb
= st
->ctx
->DrawBuffer
;
112 struct st_renderbuffer
*strb
;
115 st_flush_bitmap_cache(st
);
116 st_invalidate_readpix_cache(st
);
118 st
->state
.fb_orientation
= st_fb_orientation(fb
);
121 * Quantize the derived default number of samples:
123 * A query to the driver of supported MSAA values the
124 * hardware supports is done as to legalize the number
125 * of application requested samples, NumSamples.
126 * See commit eb9cf3c for more information.
128 fb
->DefaultGeometry
._NumSamples
=
129 framebuffer_quantize_num_samples(st
, fb
->DefaultGeometry
.NumSamples
);
131 framebuffer
->width
= _mesa_geometric_width(fb
);
132 framebuffer
->height
= _mesa_geometric_height(fb
);
133 framebuffer
->samples
= _mesa_geometric_samples(fb
);
134 framebuffer
->layers
= _mesa_geometric_layers(fb
);
136 /* Examine Mesa's ctx->DrawBuffer->_ColorDrawBuffers state
137 * to determine which surfaces to draw to
139 framebuffer
->nr_cbufs
= fb
->_NumColorDrawBuffers
;
141 for (i
= 0; i
< fb
->_NumColorDrawBuffers
; i
++) {
142 pipe_surface_reference(&framebuffer
->cbufs
[i
], NULL
);
144 strb
= st_renderbuffer(fb
->_ColorDrawBuffers
[i
]);
147 if (strb
->is_rtt
|| (strb
->texture
&&
148 _mesa_get_format_color_encoding(strb
->Base
.Format
) == GL_SRGB
)) {
149 /* rendering to a GL texture, may have to update surface */
150 st_update_renderbuffer_surface(st
, strb
);
154 pipe_surface_reference(&framebuffer
->cbufs
[i
], strb
->surface
);
155 update_framebuffer_size(framebuffer
, strb
->surface
);
157 strb
->defined
= GL_TRUE
; /* we'll be drawing something */
161 for (i
= framebuffer
->nr_cbufs
; i
< PIPE_MAX_COLOR_BUFS
; i
++) {
162 pipe_surface_reference(&framebuffer
->cbufs
[i
], NULL
);
165 /* Remove trailing GL_NONE draw buffers. */
166 while (framebuffer
->nr_cbufs
&&
167 !framebuffer
->cbufs
[framebuffer
->nr_cbufs
-1]) {
168 framebuffer
->nr_cbufs
--;
172 * Depth/Stencil renderbuffer/surface.
174 strb
= st_renderbuffer(fb
->Attachment
[BUFFER_DEPTH
].Renderbuffer
);
177 /* rendering to a GL texture, may have to update surface */
178 st_update_renderbuffer_surface(st
, strb
);
180 pipe_surface_reference(&framebuffer
->zsbuf
, strb
->surface
);
181 update_framebuffer_size(framebuffer
, strb
->surface
);
184 strb
= st_renderbuffer(fb
->Attachment
[BUFFER_STENCIL
].Renderbuffer
);
187 /* rendering to a GL texture, may have to update surface */
188 st_update_renderbuffer_surface(st
, strb
);
190 pipe_surface_reference(&framebuffer
->zsbuf
, strb
->surface
);
191 update_framebuffer_size(framebuffer
, strb
->surface
);
194 pipe_surface_reference(&framebuffer
->zsbuf
, NULL
);
198 /* Make sure the resource binding flags were set properly */
199 for (i
= 0; i
< framebuffer
->nr_cbufs
; i
++) {
200 assert(!framebuffer
->cbufs
[i
] ||
201 framebuffer
->cbufs
[i
]->texture
->bind
& PIPE_BIND_RENDER_TARGET
);
203 if (framebuffer
->zsbuf
) {
204 assert(framebuffer
->zsbuf
->texture
->bind
& PIPE_BIND_DEPTH_STENCIL
);
208 if (framebuffer
->width
== UINT_MAX
)
209 framebuffer
->width
= 0;
210 if (framebuffer
->height
== UINT_MAX
)
211 framebuffer
->height
= 0;
213 cso_set_framebuffer(st
->cso_context
, framebuffer
);
217 const struct st_tracked_state st_update_framebuffer
= {
218 update_framebuffer_state
/* update */