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"
29 #include "svga_screen.h"
30 #include "svga_context.h"
31 #include "svga_state.h"
33 #include "svga_tgsi.h"
34 #include "svga_debug.h"
36 #include "svga_hw_reg.h"
40 * Don't try to send more than 4kb of successive constants.
42 #define MAX_CONST_REG_COUNT 256 /**< number of float[4] constants */
47 * Convert from PIPE_SHADER_* to SVGA3D_SHADERTYPE_*
50 svga_shader_type(unsigned shader
)
53 case PIPE_SHADER_VERTEX
:
54 return SVGA3D_SHADERTYPE_VS
;
55 case PIPE_SHADER_FRAGMENT
:
56 return SVGA3D_SHADERTYPE_PS
;
58 assert(!"Unexpected shader type");
59 return SVGA3D_SHADERTYPE_VS
;
65 * Check and emit one shader constant register.
66 * \param shader PIPE_SHADER_FRAGMENT or PIPE_SHADER_VERTEX
67 * \param i which float[4] constant to change
68 * \param value the new float[4] value
70 static enum pipe_error
71 emit_const(struct svga_context
*svga
, unsigned shader
, unsigned i
,
74 enum pipe_error ret
= PIPE_OK
;
76 assert(shader
< PIPE_SHADER_TYPES
);
77 assert(i
< SVGA3D_CONSTREG_MAX
);
79 if (memcmp(svga
->state
.hw_draw
.cb
[shader
][i
], value
,
80 4 * sizeof(float)) != 0) {
81 if (SVGA_DEBUG
& DEBUG_CONSTS
)
82 debug_printf("%s %s %u: %f %f %f %f\n",
84 shader
== PIPE_SHADER_VERTEX
? "VERT" : "FRAG",
91 ret
= SVGA3D_SetShaderConst( svga
->swc
,
93 svga_shader_type(shader
),
94 SVGA3D_CONST_TYPE_FLOAT
,
99 memcpy(svga
->state
.hw_draw
.cb
[shader
][i
], value
, 4 * sizeof(float));
107 * Check and emit a range of shader constant registers, trying to coalesce
108 * successive shader constant updates in a single command in order to save
109 * space on the command buffer. This is a HWv8 feature.
111 static enum pipe_error
112 emit_const_range(struct svga_context
*svga
,
116 const float (*values
)[4])
122 if (offset
+ count
> SVGA3D_CONSTREG_MAX
) {
123 debug_printf("svga: too many constants (offset + count = %u)\n",
128 if (offset
> SVGA3D_CONSTREG_MAX
) {
129 /* This isn't OK, but if we propagate an error all the way up we'll
130 * just get into more trouble.
131 * XXX note that offset is always zero at this time so this is moot.
136 if (offset
+ count
> SVGA3D_CONSTREG_MAX
) {
137 /* Just drop the extra constants for now.
138 * Ideally we should not have allowed the app to create a shader
139 * that exceeds our constant buffer size but there's no way to
140 * express that in gallium at this time.
142 count
= SVGA3D_CONSTREG_MAX
- offset
;
147 if (memcmp(svga
->state
.hw_draw
.cb
[shader
][offset
+ i
],
149 4 * sizeof(float)) != 0) {
150 /* Found one dirty constant
152 if (SVGA_DEBUG
& DEBUG_CONSTS
)
153 debug_printf("%s %s %d: %f %f %f %f\n",
155 shader
== PIPE_SHADER_VERTEX
? "VERT" : "FRAG",
162 /* Look for more consecutive dirty constants.
166 j
< i
+ MAX_CONST_REG_COUNT
&&
167 memcmp(svga
->state
.hw_draw
.cb
[shader
][offset
+ j
],
169 4 * sizeof(float)) != 0) {
171 if (SVGA_DEBUG
& DEBUG_CONSTS
)
172 debug_printf("%s %s %d: %f %f %f %f\n",
174 shader
== PIPE_SHADER_VERTEX
? "VERT" : "FRAG",
186 /* Send them all together.
188 ret
= SVGA3D_SetShaderConsts(svga
->swc
,
190 svga_shader_type(shader
),
191 SVGA3D_CONST_TYPE_FLOAT
,
193 if (ret
!= PIPE_OK
) {
198 * Local copy of the hardware state.
200 memcpy(svga
->state
.hw_draw
.cb
[shader
][offset
+ i
],
202 (j
- i
) * 4 * sizeof(float));
215 * Emit all the constants in a constant buffer for a shader stage.
217 static enum pipe_error
218 emit_consts(struct svga_context
*svga
, unsigned shader
)
220 struct svga_screen
*ss
= svga_screen(svga
->pipe
.screen
);
221 struct pipe_transfer
*transfer
= NULL
;
223 const float (*data
)[4] = NULL
;
225 enum pipe_error ret
= PIPE_OK
;
226 const unsigned offset
= 0;
228 assert(shader
< PIPE_SHADER_TYPES
);
230 if (svga
->curr
.cb
[shader
] == NULL
)
233 count
= svga
->curr
.cb
[shader
]->width0
/ (4 * sizeof(float));
235 data
= (const float (*)[4])pipe_buffer_map(&svga
->pipe
,
236 svga
->curr
.cb
[shader
],
240 ret
= PIPE_ERROR_OUT_OF_MEMORY
;
244 if (ss
->hw_version
>= SVGA3D_HWVERSION_WS8_B1
) {
245 ret
= emit_const_range( svga
, shader
, offset
, count
, data
);
246 if (ret
!= PIPE_OK
) {
250 for (i
= 0; i
< count
; i
++) {
251 ret
= emit_const( svga
, shader
, offset
+ i
, data
[i
] );
252 if (ret
!= PIPE_OK
) {
260 pipe_buffer_unmap(&svga
->pipe
, transfer
);
266 static enum pipe_error
267 emit_fs_consts(struct svga_context
*svga
, unsigned dirty
)
269 const struct svga_shader_variant
*variant
= svga
->state
.hw_draw
.fs
;
270 enum pipe_error ret
= PIPE_OK
;
272 ret
= emit_consts( svga
, PIPE_SHADER_FRAGMENT
);
276 /* The internally generated fragment shader for xor blending
277 * doesn't have a 'variant' struct. It should be fixed to avoid
278 * this special case, but work around it with a NULL check:
281 const struct svga_fs_compile_key
*key
= &variant
->key
.fkey
;
282 if (key
->num_unnormalized_coords
) {
283 const unsigned offset
=
284 variant
->shader
->info
.file_max
[TGSI_FILE_CONSTANT
] + 1;
287 for (i
= 0; i
< key
->num_textures
; i
++) {
288 if (key
->tex
[i
].unnormalized
) {
289 struct pipe_resource
*tex
= svga
->curr
.sampler_views
[i
]->texture
;
292 data
[0] = 1.0f
/ (float) tex
->width0
;
293 data
[1] = 1.0f
/ (float) tex
->height0
;
297 ret
= emit_const(svga
,
298 PIPE_SHADER_FRAGMENT
,
299 key
->tex
[i
].width_height_idx
+ offset
,
301 if (ret
!= PIPE_OK
) {
313 struct svga_tracked_state svga_hw_fs_constants
=
316 (SVGA_NEW_FS_CONST_BUFFER
|
317 SVGA_NEW_FS_VARIANT
|
318 SVGA_NEW_TEXTURE_BINDING
),
324 static enum pipe_error
325 emit_vs_consts(struct svga_context
*svga
, unsigned dirty
)
327 const struct svga_shader_variant
*variant
= svga
->state
.hw_draw
.vs
;
328 const struct svga_vs_compile_key
*key
;
329 enum pipe_error ret
= PIPE_OK
;
332 /* SVGA_NEW_VS_VARIANT
337 key
= &variant
->key
.vkey
;
339 /* SVGA_NEW_VS_CONST_BUFFER
341 ret
= emit_consts( svga
, PIPE_SHADER_VERTEX
);
345 /* offset = number of constants in the VS const buffer */
346 offset
= variant
->shader
->info
.file_max
[TGSI_FILE_CONSTANT
] + 1;
348 /* SVGA_NEW_VS_PRESCALE
349 * Put the viewport pre-scale/translate values into the const buffer.
351 if (key
->need_prescale
) {
352 ret
= emit_const( svga
, PIPE_SHADER_VERTEX
, offset
++,
353 svga
->state
.hw_clear
.prescale
.scale
);
357 ret
= emit_const( svga
, PIPE_SHADER_VERTEX
, offset
++,
358 svga
->state
.hw_clear
.prescale
.translate
);
367 struct svga_tracked_state svga_hw_vs_constants
=
371 SVGA_NEW_VS_CONST_BUFFER
|
372 SVGA_NEW_VS_VARIANT
),