2 Copyright (C) Intel Corp. 2006. All Rights Reserved.
3 Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
4 develop this 3D driver.
6 Permission is hereby granted, free of charge, to any person obtaining
7 a 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, sublicense, 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
16 portions of the Software.
18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
21 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **********************************************************************/
29 * Keith Whitwell <keith@tungstengraphics.com>
33 #include "brw_context.h"
34 #include "brw_state.h"
35 #include "brw_defines.h"
37 #include "main/macros.h"
39 static void prepare_cc_vp( struct brw_context
*brw
)
41 GLcontext
*ctx
= &brw
->intel
.ctx
;
42 struct brw_cc_viewport ccv
;
44 memset(&ccv
, 0, sizeof(ccv
));
47 if (ctx
->Transform
.DepthClamp
) {
49 ccv
.min_depth
= MIN2(ctx
->Viewport
.Near
, ctx
->Viewport
.Far
);
50 ccv
.max_depth
= MAX2(ctx
->Viewport
.Near
, ctx
->Viewport
.Far
);
56 dri_bo_unreference(brw
->cc
.vp_bo
);
57 brw
->cc
.vp_bo
= brw_cache_data(&brw
->cache
, BRW_CC_VP
, &ccv
, sizeof(ccv
),
61 const struct brw_tracked_state brw_cc_vp
= {
63 .mesa
= _NEW_VIEWPORT
| _NEW_TRANSFORM
,
64 .brw
= BRW_NEW_CONTEXT
,
67 .prepare
= prepare_cc_vp
70 struct brw_cc_unit_key
{
71 GLboolean stencil
, stencil_two_side
, color_blend
, alpha_enabled
;
73 GLenum stencil_func
[2], stencil_fail_op
[2];
74 GLenum stencil_pass_depth_fail_op
[2], stencil_pass_depth_pass_op
[2];
75 GLubyte stencil_ref
[2], stencil_write_mask
[2], stencil_test_mask
[2];
78 GLenum blend_eq_rgb
, blend_eq_a
;
79 GLenum blend_src_rgb
, blend_src_a
;
80 GLenum blend_dst_rgb
, blend_dst_a
;
87 GLboolean depth_test
, depth_write
;
92 * Modify blend function to force destination alpha to 1.0
94 * If \c function specifies a blend function that uses destination alpha,
95 * replace it with a function that hard-wires destination alpha to 1.0. This
96 * is used when rendering to xRGB targets.
99 fix_xRGB_alpha(GLenum function
)
105 case GL_ONE_MINUS_DST_ALPHA
:
106 case GL_SRC_ALPHA_SATURATE
:
114 cc_unit_populate_key(struct brw_context
*brw
, struct brw_cc_unit_key
*key
)
116 GLcontext
*ctx
= &brw
->intel
.ctx
;
117 const unsigned back
= ctx
->Stencil
._BackFace
;
119 memset(key
, 0, sizeof(*key
));
121 key
->stencil
= ctx
->Stencil
._Enabled
;
122 key
->stencil_two_side
= ctx
->Stencil
._TestTwoSide
;
125 key
->stencil_func
[0] = ctx
->Stencil
.Function
[0];
126 key
->stencil_fail_op
[0] = ctx
->Stencil
.FailFunc
[0];
127 key
->stencil_pass_depth_fail_op
[0] = ctx
->Stencil
.ZFailFunc
[0];
128 key
->stencil_pass_depth_pass_op
[0] = ctx
->Stencil
.ZPassFunc
[0];
129 key
->stencil_ref
[0] = ctx
->Stencil
.Ref
[0];
130 key
->stencil_write_mask
[0] = ctx
->Stencil
.WriteMask
[0];
131 key
->stencil_test_mask
[0] = ctx
->Stencil
.ValueMask
[0];
133 if (key
->stencil_two_side
) {
134 key
->stencil_func
[1] = ctx
->Stencil
.Function
[back
];
135 key
->stencil_fail_op
[1] = ctx
->Stencil
.FailFunc
[back
];
136 key
->stencil_pass_depth_fail_op
[1] = ctx
->Stencil
.ZFailFunc
[back
];
137 key
->stencil_pass_depth_pass_op
[1] = ctx
->Stencil
.ZPassFunc
[back
];
138 key
->stencil_ref
[1] = ctx
->Stencil
.Ref
[back
];
139 key
->stencil_write_mask
[1] = ctx
->Stencil
.WriteMask
[back
];
140 key
->stencil_test_mask
[1] = ctx
->Stencil
.ValueMask
[back
];
143 if (ctx
->Color
._LogicOpEnabled
)
144 key
->logic_op
= ctx
->Color
.LogicOp
;
146 key
->logic_op
= GL_COPY
;
148 key
->color_blend
= ctx
->Color
.BlendEnabled
;
149 if (key
->color_blend
) {
150 key
->blend_eq_rgb
= ctx
->Color
.BlendEquationRGB
;
151 key
->blend_eq_a
= ctx
->Color
.BlendEquationA
;
152 key
->blend_src_rgb
= ctx
->Color
.BlendSrcRGB
;
153 key
->blend_dst_rgb
= ctx
->Color
.BlendDstRGB
;
154 key
->blend_src_a
= ctx
->Color
.BlendSrcA
;
155 key
->blend_dst_a
= ctx
->Color
.BlendDstA
;
157 /* If the renderbuffer is XRGB, we have to frob the blend function to
158 * force the destination alpha to 1.0. This means replacing GL_DST_ALPHA
159 * with GL_ONE and GL_ONE_MINUS_DST_ALPHA with GL_ZERO.
161 if (ctx
->DrawBuffer
->Visual
.alphaBits
== 0) {
162 key
->blend_src_rgb
= fix_xRGB_alpha(key
->blend_src_rgb
);
163 key
->blend_src_a
= fix_xRGB_alpha(key
->blend_src_a
);
164 key
->blend_dst_rgb
= fix_xRGB_alpha(key
->blend_dst_rgb
);
165 key
->blend_dst_a
= fix_xRGB_alpha(key
->blend_dst_a
);
169 key
->alpha_enabled
= ctx
->Color
.AlphaEnabled
;
170 if (key
->alpha_enabled
) {
171 key
->alpha_func
= ctx
->Color
.AlphaFunc
;
172 key
->alpha_ref
= ctx
->Color
.AlphaRef
;
175 key
->dither
= ctx
->Color
.DitherFlag
;
177 key
->depth_test
= ctx
->Depth
.Test
;
178 if (key
->depth_test
) {
179 key
->depth_func
= ctx
->Depth
.Func
;
180 key
->depth_write
= ctx
->Depth
.Mask
;
185 * Creates the state cache entry for the given CC unit key.
188 cc_unit_create_from_key(struct brw_context
*brw
, struct brw_cc_unit_key
*key
)
190 struct brw_cc_unit_state cc
;
193 memset(&cc
, 0, sizeof(cc
));
197 cc
.cc0
.stencil_enable
= 1;
198 cc
.cc0
.stencil_func
=
199 intel_translate_compare_func(key
->stencil_func
[0]);
200 cc
.cc0
.stencil_fail_op
=
201 intel_translate_stencil_op(key
->stencil_fail_op
[0]);
202 cc
.cc0
.stencil_pass_depth_fail_op
=
203 intel_translate_stencil_op(key
->stencil_pass_depth_fail_op
[0]);
204 cc
.cc0
.stencil_pass_depth_pass_op
=
205 intel_translate_stencil_op(key
->stencil_pass_depth_pass_op
[0]);
206 cc
.cc1
.stencil_ref
= key
->stencil_ref
[0];
207 cc
.cc1
.stencil_write_mask
= key
->stencil_write_mask
[0];
208 cc
.cc1
.stencil_test_mask
= key
->stencil_test_mask
[0];
210 if (key
->stencil_two_side
) {
211 cc
.cc0
.bf_stencil_enable
= 1;
212 cc
.cc0
.bf_stencil_func
=
213 intel_translate_compare_func(key
->stencil_func
[1]);
214 cc
.cc0
.bf_stencil_fail_op
=
215 intel_translate_stencil_op(key
->stencil_fail_op
[1]);
216 cc
.cc0
.bf_stencil_pass_depth_fail_op
=
217 intel_translate_stencil_op(key
->stencil_pass_depth_fail_op
[1]);
218 cc
.cc0
.bf_stencil_pass_depth_pass_op
=
219 intel_translate_stencil_op(key
->stencil_pass_depth_pass_op
[1]);
220 cc
.cc1
.bf_stencil_ref
= key
->stencil_ref
[1];
221 cc
.cc2
.bf_stencil_write_mask
= key
->stencil_write_mask
[1];
222 cc
.cc2
.bf_stencil_test_mask
= key
->stencil_test_mask
[1];
225 /* Not really sure about this:
227 if (key
->stencil_write_mask
[0] ||
228 (key
->stencil_two_side
&& key
->stencil_write_mask
[1]))
229 cc
.cc0
.stencil_write_enable
= 1;
233 if (key
->logic_op
!= GL_COPY
) {
234 cc
.cc2
.logicop_enable
= 1;
235 cc
.cc5
.logicop_func
= intel_translate_logic_op(key
->logic_op
);
236 } else if (key
->color_blend
) {
237 GLenum eqRGB
= key
->blend_eq_rgb
;
238 GLenum eqA
= key
->blend_eq_a
;
239 GLenum srcRGB
= key
->blend_src_rgb
;
240 GLenum dstRGB
= key
->blend_dst_rgb
;
241 GLenum srcA
= key
->blend_src_a
;
242 GLenum dstA
= key
->blend_dst_a
;
244 if (eqRGB
== GL_MIN
|| eqRGB
== GL_MAX
) {
245 srcRGB
= dstRGB
= GL_ONE
;
248 if (eqA
== GL_MIN
|| eqA
== GL_MAX
) {
249 srcA
= dstA
= GL_ONE
;
252 cc
.cc6
.dest_blend_factor
= brw_translate_blend_factor(dstRGB
);
253 cc
.cc6
.src_blend_factor
= brw_translate_blend_factor(srcRGB
);
254 cc
.cc6
.blend_function
= brw_translate_blend_equation(eqRGB
);
256 cc
.cc5
.ia_dest_blend_factor
= brw_translate_blend_factor(dstA
);
257 cc
.cc5
.ia_src_blend_factor
= brw_translate_blend_factor(srcA
);
258 cc
.cc5
.ia_blend_function
= brw_translate_blend_equation(eqA
);
260 cc
.cc3
.blend_enable
= 1;
261 cc
.cc3
.ia_blend_enable
= (srcA
!= srcRGB
||
266 if (key
->alpha_enabled
) {
267 cc
.cc3
.alpha_test
= 1;
268 cc
.cc3
.alpha_test_func
= intel_translate_compare_func(key
->alpha_func
);
269 cc
.cc3
.alpha_test_format
= BRW_ALPHATEST_FORMAT_UNORM8
;
271 UNCLAMPED_FLOAT_TO_UBYTE(cc
.cc7
.alpha_ref
.ub
[0], key
->alpha_ref
);
275 cc
.cc5
.dither_enable
= 1;
276 cc
.cc6
.y_dither_offset
= 0;
277 cc
.cc6
.x_dither_offset
= 0;
281 if (key
->depth_test
) {
282 cc
.cc2
.depth_test
= 1;
283 cc
.cc2
.depth_test_function
= intel_translate_compare_func(key
->depth_func
);
284 cc
.cc2
.depth_write_enable
= key
->depth_write
;
287 /* CACHE_NEW_CC_VP */
288 cc
.cc4
.cc_viewport_state_offset
= brw
->cc
.vp_bo
->offset
>> 5; /* reloc */
290 if (INTEL_DEBUG
& DEBUG_STATS
)
291 cc
.cc5
.statistics_enable
= 1;
293 bo
= brw_upload_cache(&brw
->cache
, BRW_CC_UNIT
,
298 /* Emit CC viewport relocation */
299 dri_bo_emit_reloc(bo
,
300 I915_GEM_DOMAIN_INSTRUCTION
,
303 offsetof(struct brw_cc_unit_state
, cc4
),
309 static void prepare_cc_unit( struct brw_context
*brw
)
311 struct brw_cc_unit_key key
;
313 cc_unit_populate_key(brw
, &key
);
315 dri_bo_unreference(brw
->cc
.state_bo
);
316 brw
->cc
.state_bo
= brw_search_cache(&brw
->cache
, BRW_CC_UNIT
,
321 if (brw
->cc
.state_bo
== NULL
)
322 brw
->cc
.state_bo
= cc_unit_create_from_key(brw
, &key
);
325 const struct brw_tracked_state brw_cc_unit
= {
327 .mesa
= _NEW_STENCIL
| _NEW_COLOR
| _NEW_DEPTH
,
329 .cache
= CACHE_NEW_CC_VP
331 .prepare
= prepare_cc_unit
,