1 /*
2 * Copyright (c) 2012-2015 Etnaviv Project
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sub license,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the
12 * next paragraph) shall be included in all copies or substantial portions
13 * of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Wladimir J. van der Laan <[email protected]>
25 */
26
27 #include "etnaviv_blend.h"
28
29 #include "etnaviv_context.h"
30 #include "etnaviv_screen.h"
31 #include "etnaviv_translate.h"
32 #include "pipe/p_defines.h"
33 #include "util/u_memory.h"
34 #include "util/half_float.h"
35
36 void *
etna_blend_state_create(struct pipe_context * pctx,const struct pipe_blend_state * so)37 etna_blend_state_create(struct pipe_context *pctx,
38 const struct pipe_blend_state *so)
39 {
40 struct etna_context *ctx = etna_context(pctx);
41 const struct pipe_rt_blend_state *rt0 = &so->rt[0];
42 struct etna_blend_state *co = CALLOC_STRUCT(etna_blend_state);
43 bool alpha_enable, logicop_enable;
44
45 /* pipe_blend_func happens to match the hardware. */
46 STATIC_ASSERT(PIPE_BLEND_ADD == BLEND_EQ_ADD);
47 STATIC_ASSERT(PIPE_BLEND_SUBTRACT == BLEND_EQ_SUBTRACT);
48 STATIC_ASSERT(PIPE_BLEND_REVERSE_SUBTRACT == BLEND_EQ_REVERSE_SUBTRACT);
49 STATIC_ASSERT(PIPE_BLEND_MIN == BLEND_EQ_MIN);
50 STATIC_ASSERT(PIPE_BLEND_MAX == BLEND_EQ_MAX);
51
52 if (!co)
53 return NULL;
54
55 co->base = *so;
56
57 /* Enable blending if
58 * - blend enabled in blend state
59 * - NOT source factor is ONE and destination factor ZERO and eq is ADD for
60 * both rgb and alpha (which mean that blending is effectively disabled)
61 */
62 alpha_enable = rt0->blend_enable &&
63 !(rt0->rgb_src_factor == PIPE_BLENDFACTOR_ONE &&
64 rt0->rgb_dst_factor == PIPE_BLENDFACTOR_ZERO &&
65 rt0->rgb_func == PIPE_BLEND_ADD &&
66 rt0->alpha_src_factor == PIPE_BLENDFACTOR_ONE &&
67 rt0->alpha_dst_factor == PIPE_BLENDFACTOR_ZERO &&
68 rt0->alpha_func == PIPE_BLEND_ADD);
69
70 /* Enable separate alpha if
71 * - Blending enabled (see above)
72 * - NOT source/destination factor and eq is same for both rgb and alpha
73 * (which would effectively that mean alpha is not separate), and
74 */
75 bool separate_alpha = alpha_enable &&
76 !(rt0->rgb_src_factor == rt0->alpha_src_factor &&
77 rt0->rgb_dst_factor == rt0->alpha_dst_factor &&
78 rt0->rgb_func == rt0->alpha_func);
79
80 if (alpha_enable) {
81 co->PE_ALPHA_CONFIG =
82 VIVS_PE_ALPHA_CONFIG_BLEND_ENABLE_COLOR |
83 COND(separate_alpha, VIVS_PE_ALPHA_CONFIG_BLEND_SEPARATE_ALPHA) |
84 VIVS_PE_ALPHA_CONFIG_SRC_FUNC_COLOR(translate_blend_factor(rt0->rgb_src_factor)) |
85 VIVS_PE_ALPHA_CONFIG_SRC_FUNC_ALPHA(translate_blend_factor(rt0->alpha_src_factor)) |
86 VIVS_PE_ALPHA_CONFIG_DST_FUNC_COLOR(translate_blend_factor(rt0->rgb_dst_factor)) |
87 VIVS_PE_ALPHA_CONFIG_DST_FUNC_ALPHA(translate_blend_factor(rt0->alpha_dst_factor)) |
88 VIVS_PE_ALPHA_CONFIG_EQ_COLOR(rt0->rgb_func) |
89 VIVS_PE_ALPHA_CONFIG_EQ_ALPHA(rt0->alpha_func);
90 } else {
91 co->PE_ALPHA_CONFIG = 0;
92 }
93
94 logicop_enable = so->logicop_enable &&
95 VIV_FEATURE(ctx->screen, ETNA_FEATURE_LOGIC_OP);
96
97 co->PE_LOGIC_OP =
98 VIVS_PE_LOGIC_OP_OP(logicop_enable ? so->logicop_func : LOGIC_OP_COPY) |
99 VIVS_PE_LOGIC_OP_DITHER_MODE(3) | /* TODO: related to dithering, sometimes 2 */
100 0x000E4000 /* ??? */;
101
102 co->fo_allowed = !alpha_enable && !logicop_enable;
103
104 /* independent_blend_enable not needed: only one rt supported */
105 /* XXX alpha_to_coverage / alpha_to_one? */
106 /* Set dither registers based on dither status. These registers set the
107 * dither pattern,
108 * for now, set the same values as the blob.
109 */
110 if (so->dither &&
111 (!alpha_enable ||
112 VIV_FEATURE(ctx->screen, ETNA_FEATURE_PE_DITHER_FIX))) {
113 co->PE_DITHER[0] = 0x6e4ca280;
114 co->PE_DITHER[1] = 0x5d7f91b3;
115 } else {
116 co->PE_DITHER[0] = 0xffffffff;
117 co->PE_DITHER[1] = 0xffffffff;
118 }
119
120 return co;
121 }
122
123 bool
etna_update_blend(struct etna_context * ctx)124 etna_update_blend(struct etna_context *ctx)
125 {
126 struct pipe_framebuffer_state *pfb = &ctx->framebuffer_s;
127 struct pipe_blend_state *pblend = ctx->blend;
128 struct etna_blend_state *blend = etna_blend_state(pblend);
129 const struct pipe_rt_blend_state *rt0 = &pblend->rt[0];
130 const struct util_format_description *desc;
131 uint32_t colormask;
132
133 if (pfb->cbufs[0] &&
134 translate_pe_format_rb_swap(pfb->cbufs[0]->format)) {
135 colormask = rt0->colormask & (PIPE_MASK_A | PIPE_MASK_G);
136 if (rt0->colormask & PIPE_MASK_R)
137 colormask |= PIPE_MASK_B;
138 if (rt0->colormask & PIPE_MASK_B)
139 colormask |= PIPE_MASK_R;
140 } else {
141 colormask = rt0->colormask;
142 }
143
144 /* If the complete render target is written, set full_overwrite:
145 * - The color mask covers all channels of the render target
146 * - No blending or logicop is used
147 */
148 if (pfb->cbufs[0])
149 desc = util_format_description(pfb->cbufs[0]->format);
150 bool full_overwrite = !pfb->cbufs[0] || ((blend->fo_allowed &&
151 util_format_colormask_full(desc, colormask)));
152 blend->PE_COLOR_FORMAT =
153 VIVS_PE_COLOR_FORMAT_COMPONENTS(colormask) |
154 COND(full_overwrite, VIVS_PE_COLOR_FORMAT_OVERWRITE);
155
156 return true;
157 }
158
159 void
etna_set_blend_color(struct pipe_context * pctx,const struct pipe_blend_color * bc)160 etna_set_blend_color(struct pipe_context *pctx, const struct pipe_blend_color *bc)
161 {
162 struct etna_context *ctx = etna_context(pctx);
163 struct compiled_blend_color *cs = &ctx->blend_color;
164
165 memcpy(cs->color, bc->color, sizeof(float) * 4);
166
167 ctx->dirty |= ETNA_DIRTY_BLEND_COLOR;
168 }
169
170 bool
etna_update_blend_color(struct etna_context * ctx)171 etna_update_blend_color(struct etna_context *ctx)
172 {
173 struct pipe_framebuffer_state *pfb = &ctx->framebuffer_s;
174 struct compiled_blend_color *cs = &ctx->blend_color;
175 bool rb_swap = (pfb->cbufs[0] && translate_pe_format_rb_swap(pfb->cbufs[0]->format));
176
177 cs->PE_ALPHA_BLEND_COLOR =
178 VIVS_PE_ALPHA_BLEND_COLOR_R(float_to_ubyte(cs->color[rb_swap ? 2 : 0])) |
179 VIVS_PE_ALPHA_BLEND_COLOR_G(float_to_ubyte(cs->color[1])) |
180 VIVS_PE_ALPHA_BLEND_COLOR_B(float_to_ubyte(cs->color[rb_swap ? 0 : 2])) |
181 VIVS_PE_ALPHA_BLEND_COLOR_A(float_to_ubyte(cs->color[3]));
182
183 cs->PE_ALPHA_COLOR_EXT0 =
184 VIVS_PE_ALPHA_COLOR_EXT0_B(_mesa_float_to_half(cs->color[rb_swap ? 2 : 0])) |
185 VIVS_PE_ALPHA_COLOR_EXT0_G(_mesa_float_to_half(cs->color[1]));
186 cs->PE_ALPHA_COLOR_EXT1 =
187 VIVS_PE_ALPHA_COLOR_EXT1_R(_mesa_float_to_half(cs->color[rb_swap ? 0 : 2])) |
188 VIVS_PE_ALPHA_COLOR_EXT1_A(_mesa_float_to_half(cs->color[3]));
189
190 return true;
191 }
192