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 **************************************************************************/
29 #include "main/context.h"
30 #include "main/viewport.h"
31 #include "st_context.h"
34 #include "pipe/p_context.h"
35 #include "cso_cache/cso_context.h"
37 static enum pipe_viewport_swizzle
38 viewport_swizzle_from_glenum(GLenum16 swizzle
)
40 return swizzle
- GL_VIEWPORT_SWIZZLE_POSITIVE_X_NV
;
44 * Update the viewport transformation matrix. Depends on:
47 * - window pos/size or FBO size
50 st_update_viewport( struct st_context
*st
)
52 struct gl_context
*ctx
= st
->ctx
;
57 for (i
= 0; i
< st
->state
.num_viewports
; i
++) {
58 float *scale
= st
->state
.viewport
[i
].scale
;
59 float *translate
= st
->state
.viewport
[i
].translate
;
61 _mesa_get_viewport_xform(ctx
, i
, scale
, translate
);
64 /* Drawing to a window where the coordinate system is upside down. */
65 if (st
->state
.fb_orientation
== Y_0_TOP
) {
67 translate
[1] = st
->state
.fb_height
- translate
[1];
70 st
->state
.viewport
[i
].swizzle_x
= viewport_swizzle_from_glenum(ctx
->ViewportArray
[i
].SwizzleX
);
71 st
->state
.viewport
[i
].swizzle_y
= viewport_swizzle_from_glenum(ctx
->ViewportArray
[i
].SwizzleY
);
72 st
->state
.viewport
[i
].swizzle_z
= viewport_swizzle_from_glenum(ctx
->ViewportArray
[i
].SwizzleZ
);
73 st
->state
.viewport
[i
].swizzle_w
= viewport_swizzle_from_glenum(ctx
->ViewportArray
[i
].SwizzleW
);
76 cso_set_viewport(st
->cso_context
, &st
->state
.viewport
[0]);
78 if (st
->state
.num_viewports
> 1) {
79 struct pipe_context
*pipe
= st
->pipe
;
81 pipe
->set_viewport_states(pipe
, 1, st
->state
.num_viewports
- 1,
82 &st
->state
.viewport
[1]);