1 /*
2 * Copyright (C) 2018 Alyssa Rosenzweig
3 * Copyright (C) 2019-2021 Collabora, Ltd.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 */
24
25 #ifndef __PAN_BLEND_H__
26 #define __PAN_BLEND_H__
27
28 #include "genxml/gen_macros.h"
29
30 #include "util/u_dynarray.h"
31 #include "util/format/u_format.h"
32 #include "compiler/shader_enums.h"
33 #include "compiler/nir/nir.h"
34
35 #include "panfrost/util/pan_ir.h"
36
37 struct MALI_BLEND_EQUATION;
38 struct panfrost_device;
39
40 struct pan_blend_equation {
41 unsigned blend_enable : 1;
42 enum blend_func rgb_func : 3;
43 unsigned rgb_invert_src_factor : 1;
44 enum blend_factor rgb_src_factor : 4;
45 unsigned rgb_invert_dst_factor : 1;
46 enum blend_factor rgb_dst_factor : 4;
47 enum blend_func alpha_func : 3;
48 unsigned alpha_invert_src_factor : 1;
49 enum blend_factor alpha_src_factor : 4;
50 unsigned alpha_invert_dst_factor : 1;
51 enum blend_factor alpha_dst_factor : 4;
52 unsigned color_mask : 4;
53 };
54
55 struct pan_blend_rt_state {
56 /* RT format */
57 enum pipe_format format;
58
59 /* Number of samples */
60 unsigned nr_samples;
61
62 struct pan_blend_equation equation;
63 };
64
65 struct pan_blend_state {
66 bool logicop_enable;
67 enum pipe_logicop logicop_func;
68 float constants[4];
69 unsigned rt_count;
70 struct pan_blend_rt_state rts[8];
71 };
72
73 struct pan_blend_shader_key {
74 enum pipe_format format;
75 nir_alu_type src0_type, src1_type;
76 uint32_t rt : 3;
77 uint32_t has_constants : 1;
78 uint32_t logicop_enable : 1;
79 uint32_t logicop_func:4;
80 uint32_t nr_samples : 5;
81 uint32_t padding : 18;
82 struct pan_blend_equation equation;
83 };
84
85 struct pan_blend_shader_variant {
86 struct list_head node;
87 float constants[4];
88 struct util_dynarray binary;
89 unsigned first_tag;
90 unsigned work_reg_count;
91 };
92
93 #define PAN_BLEND_SHADER_MAX_VARIANTS 16
94
95 struct pan_blend_shader {
96 struct pan_blend_shader_key key;
97 unsigned nvariants;
98 struct list_head variants;
99 };
100
101 bool
102 pan_blend_reads_dest(const struct pan_blend_equation eq);
103
104 bool
105 pan_blend_can_fixed_function(const struct pan_blend_equation equation,
106 bool supports_2src);
107
108 bool
109 pan_blend_is_opaque(const struct pan_blend_equation eq);
110
111 unsigned
112 pan_blend_constant_mask(const struct pan_blend_equation eq);
113
114 /* Fixed-function blending only supports a single constant, so if multiple bits
115 * are set in constant_mask, the constants must match. Therefore we may pick
116 * just the first constant. */
117
118 static inline float
pan_blend_get_constant(unsigned mask,const float * constants)119 pan_blend_get_constant(unsigned mask, const float *constants)
120 {
121 return mask ? constants[ffs(mask) - 1] : 0.0;
122 }
123
124 /* v6 doesn't support blend constants in FF blend equations whatsoever, and v7
125 * only uses the constant from RT 0 (TODO: what if it's the same constant? or a
126 * constant is shared?) */
127
128 static inline bool
pan_blend_supports_constant(unsigned arch,unsigned rt)129 pan_blend_supports_constant(unsigned arch, unsigned rt)
130 {
131 return !((arch == 6) || (arch == 7 && rt > 0));
132 }
133
134 /* The SOURCE_2 value is new in Bifrost */
135
136 static inline bool
pan_blend_supports_2src(unsigned arch)137 pan_blend_supports_2src(unsigned arch)
138 {
139 return (arch >= 6);
140 }
141
142 bool
143 pan_blend_is_homogenous_constant(unsigned mask, const float *constants);
144
145 void
146 pan_blend_to_fixed_function_equation(const struct pan_blend_equation eq,
147 struct MALI_BLEND_EQUATION *equation);
148
149 uint32_t
150 pan_pack_blend(const struct pan_blend_equation equation);
151
152 void
153 pan_blend_shaders_init(struct panfrost_device *dev);
154
155 void
156 pan_blend_shaders_cleanup(struct panfrost_device *dev);
157
158 #ifdef PAN_ARCH
159
160 nir_shader *
161 GENX(pan_blend_create_shader)(const struct panfrost_device *dev,
162 const struct pan_blend_state *state,
163 nir_alu_type src0_type,
164 nir_alu_type src1_type,
165 unsigned rt);
166
167 #if PAN_ARCH >= 6
168 uint64_t
169 GENX(pan_blend_get_internal_desc)(const struct panfrost_device *dev,
170 enum pipe_format fmt, unsigned rt,
171 unsigned force_size, bool dithered);
172 #endif
173
174 /* Take blend_shaders.lock before calling this function and release it when
175 * you're done with the shader variant object.
176 */
177 struct pan_blend_shader_variant *
178 GENX(pan_blend_get_shader_locked)(const struct panfrost_device *dev,
179 const struct pan_blend_state *state,
180 nir_alu_type src0_type,
181 nir_alu_type src1_type,
182 unsigned rt);
183 #endif
184
185 #endif
186