1 /**********************************************************
2 * Copyright 2008-2009 VMware, Inc. All rights reserved.
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without
7 * restriction, including without limitation the rights to use, copy,
8 * modify, merge, publish, distribute, sublicense, and/or sell copies
9 * of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 **********************************************************/
26 #include "util/u_inlines.h"
27 #include "pipe/p_defines.h"
28 #include "util/u_math.h"
30 #include "svga_context.h"
31 #include "svga_state.h"
33 #include "svga_debug.h"
36 /***********************************************************************
37 * Hardware state update
41 static enum pipe_error
42 emit_framebuffer( struct svga_context
*svga
,
45 const struct pipe_framebuffer_state
*curr
= &svga
->curr
.framebuffer
;
46 struct pipe_framebuffer_state
*hw
= &svga
->state
.hw_clear
.framebuffer
;
47 boolean reemit
= svga
->rebind
.rendertargets
;
52 * We need to reemit non-null surface bindings, even when they are not
53 * dirty, to ensure that the resources are paged in.
56 for(i
= 0; i
< PIPE_MAX_COLOR_BUFS
; ++i
) {
57 if (curr
->cbufs
[i
] != hw
->cbufs
[i
] ||
58 (reemit
&& hw
->cbufs
[i
])) {
59 if (svga
->curr
.nr_fbs
++ > 8)
60 return PIPE_ERROR_OUT_OF_MEMORY
;
62 ret
= SVGA3D_SetRenderTarget(svga
->swc
, SVGA3D_RT_COLOR0
+ i
, curr
->cbufs
[i
]);
66 pipe_surface_reference(&hw
->cbufs
[i
], curr
->cbufs
[i
]);
71 if (curr
->zsbuf
!= hw
->zsbuf
||
72 (reemit
&& hw
->zsbuf
)) {
73 ret
= SVGA3D_SetRenderTarget(svga
->swc
, SVGA3D_RT_DEPTH
, curr
->zsbuf
);
78 curr
->zsbuf
->format
== PIPE_FORMAT_S8_UINT_Z24_UNORM
) {
79 ret
= SVGA3D_SetRenderTarget(svga
->swc
, SVGA3D_RT_STENCIL
, curr
->zsbuf
);
84 ret
= SVGA3D_SetRenderTarget(svga
->swc
, SVGA3D_RT_STENCIL
, NULL
);
89 pipe_surface_reference(&hw
->zsbuf
, curr
->zsbuf
);
92 svga
->rebind
.rendertargets
= FALSE
;
99 * Rebind rendertargets.
101 * Similar to emit_framebuffer, but without any state checking/update.
103 * Called at the beginning of every new command buffer to ensure that
104 * non-dirty rendertargets are properly paged-in.
107 svga_reemit_framebuffer_bindings(struct svga_context
*svga
)
109 struct pipe_framebuffer_state
*hw
= &svga
->state
.hw_clear
.framebuffer
;
113 assert(svga
->rebind
.rendertargets
);
115 for (i
= 0; i
< MIN2(PIPE_MAX_COLOR_BUFS
, 8); ++i
) {
117 ret
= SVGA3D_SetRenderTarget(svga
->swc
, SVGA3D_RT_COLOR0
+ i
, hw
->cbufs
[i
]);
118 if (ret
!= PIPE_OK
) {
125 ret
= SVGA3D_SetRenderTarget(svga
->swc
, SVGA3D_RT_DEPTH
, hw
->zsbuf
);
126 if (ret
!= PIPE_OK
) {
131 hw
->zsbuf
->format
== PIPE_FORMAT_S8_UINT_Z24_UNORM
) {
132 ret
= SVGA3D_SetRenderTarget(svga
->swc
, SVGA3D_RT_STENCIL
, hw
->zsbuf
);
133 if (ret
!= PIPE_OK
) {
138 ret
= SVGA3D_SetRenderTarget(svga
->swc
, SVGA3D_RT_STENCIL
, NULL
);
139 if (ret
!= PIPE_OK
) {
145 svga
->rebind
.rendertargets
= FALSE
;
151 struct svga_tracked_state svga_hw_framebuffer
=
153 "hw framebuffer state",
154 SVGA_NEW_FRAME_BUFFER
,
161 /***********************************************************************
164 static enum pipe_error
165 emit_viewport( struct svga_context
*svga
,
168 const struct pipe_viewport_state
*viewport
= &svga
->curr
.viewport
;
169 struct svga_prescale prescale
;
171 /* Not sure if this state is relevant with POSITIONT. Probably
172 * not, but setting to 0,1 avoids some state pingponging.
174 float range_min
= 0.0;
175 float range_max
= 1.0;
177 boolean degenerate
= FALSE
;
178 boolean invertY
= FALSE
;
181 float fb_width
= (float) svga
->curr
.framebuffer
.width
;
182 float fb_height
= (float) svga
->curr
.framebuffer
.height
;
184 float fx
= viewport
->scale
[0] * -1.0f
+ viewport
->translate
[0];
185 float fy
= flip
* viewport
->scale
[1] * -1.0f
+ viewport
->translate
[1];
186 float fw
= viewport
->scale
[0] * 2.0f
;
187 float fh
= flip
* viewport
->scale
[1] * 2.0f
;
189 memset( &prescale
, 0, sizeof(prescale
) );
191 /* Examine gallium viewport transformation and produce a screen
192 * rectangle and possibly vertex shader pre-transformation to
193 * get the same results.
196 SVGA_DBG(DEBUG_VIEWPORT
,
197 "\ninitial %f,%f %fx%f\n",
203 prescale
.scale
[0] = 1.0;
204 prescale
.scale
[1] = 1.0;
205 prescale
.scale
[2] = 1.0;
206 prescale
.scale
[3] = 1.0;
207 prescale
.translate
[0] = 0;
208 prescale
.translate
[1] = 0;
209 prescale
.translate
[2] = 0;
210 prescale
.translate
[3] = 0;
211 prescale
.enabled
= TRUE
;
216 prescale
.scale
[0] *= -1.0f
;
217 prescale
.translate
[0] += -fw
;
219 fx
= viewport
->scale
[0] * 1.0f
+ viewport
->translate
[0];
223 prescale
.translate
[1] = fh
- 1.0f
+ fy
* 2.0f
;
226 prescale
.scale
[1] = -1.0f
;
231 prescale
.translate
[0] += fx
;
232 prescale
.scale
[0] *= fw
/ (fw
+ fx
);
239 prescale
.translate
[1] -= fy
;
242 prescale
.translate
[1] += fy
;
244 prescale
.scale
[1] *= fh
/ (fh
+ fy
);
249 if (fx
+ fw
> fb_width
) {
250 prescale
.scale
[0] *= fw
/ (fb_width
- fx
);
251 prescale
.translate
[0] -= fx
* (fw
/ (fb_width
- fx
));
252 prescale
.translate
[0] += fx
;
257 if (fy
+ fh
> fb_height
) {
258 prescale
.scale
[1] *= fh
/ (fb_height
- fy
);
260 float in
= fb_height
- fy
; /* number of vp pixels inside view */
261 float out
= fy
+ fh
- fb_height
; /* number of vp pixels out of view */
262 prescale
.translate
[1] += fy
* out
/ in
;
265 prescale
.translate
[1] -= fy
* (fh
/ (fb_height
- fy
));
266 prescale
.translate
[1] += fy
;
271 if (fw
< 0 || fh
< 0) {
272 fw
= fh
= fx
= fy
= 0;
278 /* D3D viewport is integer space. Convert fx,fy,etc. to
281 * TODO: adjust pretranslate correct for any subpixel error
282 * introduced converting to integers.
284 rect
.x
= (uint32
) fx
;
285 rect
.y
= (uint32
) fy
;
286 rect
.w
= (uint32
) fw
;
287 rect
.h
= (uint32
) fh
;
289 SVGA_DBG(DEBUG_VIEWPORT
,
290 "viewport error %f,%f %fx%f\n",
291 fabs((float)rect
.x
- fx
),
292 fabs((float)rect
.y
- fy
),
293 fabs((float)rect
.w
- fw
),
294 fabs((float)rect
.h
- fh
));
296 SVGA_DBG(DEBUG_VIEWPORT
,
297 "viewport %d,%d %dx%d\n",
304 /* Finally, to get GL rasterization rules, need to tweak the
305 * screen-space coordinates slightly relative to D3D which is
306 * what hardware implements natively.
308 if (svga
->curr
.rast
->templ
.gl_rasterization_rules
) {
309 float adjust_x
= 0.0;
310 float adjust_y
= 0.0;
312 switch (svga
->curr
.reduced_prim
) {
313 case PIPE_PRIM_LINES
:
317 case PIPE_PRIM_POINTS
:
318 case PIPE_PRIM_TRIANGLES
:
325 adjust_y
= -adjust_y
;
327 prescale
.translate
[0] += adjust_x
;
328 prescale
.translate
[1] += adjust_y
;
329 prescale
.translate
[2] = 0.5; /* D3D clip space */
330 prescale
.scale
[2] = 0.5; /* D3D clip space */
334 range_min
= viewport
->scale
[2] * -1.0f
+ viewport
->translate
[2];
335 range_max
= viewport
->scale
[2] * 1.0f
+ viewport
->translate
[2];
337 /* D3D (and by implication SVGA) doesn't like dealing with zmax
338 * less than zmin. Detect that case, flip the depth range and
339 * invert our z-scale factor to achieve the same effect.
341 if (range_min
> range_max
) {
343 range_tmp
= range_min
;
344 range_min
= range_max
;
345 range_max
= range_tmp
;
346 prescale
.scale
[2] = -prescale
.scale
[2];
349 if (prescale
.enabled
) {
354 SVGA_DBG(DEBUG_VIEWPORT
,
355 "prescale %f,%f %fx%f\n",
356 prescale
.translate
[0],
357 prescale
.translate
[1],
361 H
[0] = (float)rect
.w
/ 2.0f
;
362 H
[1] = -(float)rect
.h
/ 2.0f
;
363 J
[0] = (float)rect
.x
+ (float)rect
.w
/ 2.0f
;
364 J
[1] = (float)rect
.y
+ (float)rect
.h
/ 2.0f
;
366 SVGA_DBG(DEBUG_VIEWPORT
,
374 /* Adjust prescale to take into account the fact that it is
375 * going to be applied prior to the perspective divide and
376 * viewport transformation.
378 * Vwin = H(Vc/Vc.w) + J
380 * We want to tweak Vwin with scale and translation from above,
385 * But we can only modify the values at Vc. Plugging all the
386 * above together, and rearranging, eventually we get:
388 * Vwin' = H(Vc'/Vc'.w) + J
391 * K = (T + (S-1)J) / H
393 * Overwrite prescale.translate with values for K:
395 for (i
= 0; i
< 2; i
++) {
396 prescale
.translate
[i
] = ((prescale
.translate
[i
] +
397 (prescale
.scale
[i
] - 1.0f
) * J
[i
]) / H
[i
]);
400 SVGA_DBG(DEBUG_VIEWPORT
,
401 "clipspace %f,%f %fx%f\n",
402 prescale
.translate
[0],
403 prescale
.translate
[1],
414 prescale
.enabled
= FALSE
;
417 if (memcmp(&rect
, &svga
->state
.hw_clear
.viewport
, sizeof(rect
)) != 0) {
418 ret
= SVGA3D_SetViewport(svga
->swc
, &rect
);
422 memcpy(&svga
->state
.hw_clear
.viewport
, &rect
, sizeof(rect
));
423 assert(sizeof(rect
) == sizeof(svga
->state
.hw_clear
.viewport
));
426 if (svga
->state
.hw_clear
.depthrange
.zmin
!= range_min
||
427 svga
->state
.hw_clear
.depthrange
.zmax
!= range_max
)
429 ret
= SVGA3D_SetZRange(svga
->swc
, range_min
, range_max
);
433 svga
->state
.hw_clear
.depthrange
.zmin
= range_min
;
434 svga
->state
.hw_clear
.depthrange
.zmax
= range_max
;
437 if (memcmp(&prescale
, &svga
->state
.hw_clear
.prescale
, sizeof prescale
) != 0) {
438 svga
->dirty
|= SVGA_NEW_PRESCALE
;
439 svga
->state
.hw_clear
.prescale
= prescale
;
446 struct svga_tracked_state svga_hw_viewport
=
449 ( SVGA_NEW_FRAME_BUFFER
|
452 SVGA_NEW_REDUCED_PRIMITIVE
),
457 /***********************************************************************
460 static enum pipe_error
461 emit_scissor_rect( struct svga_context
*svga
,
464 const struct pipe_scissor_state
*scissor
= &svga
->curr
.scissor
;
467 rect
.x
= scissor
->minx
;
468 rect
.y
= scissor
->miny
;
469 rect
.w
= scissor
->maxx
- scissor
->minx
; /* + 1 ?? */
470 rect
.h
= scissor
->maxy
- scissor
->miny
; /* + 1 ?? */
472 return SVGA3D_SetScissorRect(svga
->swc
, &rect
);
476 struct svga_tracked_state svga_hw_scissor
=
484 /***********************************************************************
488 static enum pipe_error
489 emit_clip_planes( struct svga_context
*svga
,
495 /* TODO: just emit directly from svga_set_clip_state()?
497 for (i
= 0; i
< SVGA3D_MAX_CLIP_PLANES
; i
++) {
498 /* need to express the plane in D3D-style coordinate space.
499 * GL coords get converted to D3D coords with the matrix:
504 * Apply that matrix to our plane equation, and invert Y.
506 float a
= svga
->curr
.clip
.ucp
[i
][0];
507 float b
= svga
->curr
.clip
.ucp
[i
][1];
508 float c
= svga
->curr
.clip
.ucp
[i
][2];
509 float d
= svga
->curr
.clip
.ucp
[i
][3];
517 ret
= SVGA3D_SetClipPlane(svga
->swc
, i
, plane
);
526 struct svga_tracked_state svga_hw_clip_planes
=