1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrShaderCaps.h"
#include "GrContextOptions.h"
////////////////////////////////////////////////////////////////////////////////////////////
static const char* shader_type_to_string(GrShaderType type) {
switch (type) {
case kVertex_GrShaderType:
return "vertex";
case kGeometry_GrShaderType:
return "geometry";
case kFragment_GrShaderType:
return "fragment";
}
return "";
}
static const char* precision_to_string(GrSLPrecision p) {
switch (p) {
case kLow_GrSLPrecision:
return "low";
case kMedium_GrSLPrecision:
return "medium";
case kHigh_GrSLPrecision:
return "high";
default:
SkFAIL("Unexpected precision type.");
return "";
}
}
GrShaderCaps::GrShaderCaps(const GrContextOptions& options) {
fGLSLGeneration = k330_GrGLSLGeneration;
fShaderDerivativeSupport = false;
fGeometryShaderSupport = false;
fPathRenderingSupport = false;
fDstReadInShaderSupport = false;
fDualSourceBlendingSupport = false;
fIntegerSupport = false;
fTexelBufferSupport = false;
fImageLoadStoreSupport = false;
fShaderPrecisionVaries = false;
fDropsTileOnZeroDivide = false;
fFBFetchSupport = false;
fFBFetchNeedsCustomOutput = false;
fBindlessTextureSupport = false;
fUsesPrecisionModifiers = false;
fCanUseAnyFunctionInShader = true;
fCanUseMinAndAbsTogether = true;
fMustForceNegatedAtanParamToFloat = false;
fAtan2ImplementedAsAtanYOverX = false;
fRequiresLocalOutputColorForFBFetch = false;
fMustImplementGSInvocationsWithLoop = false;
fFlatInterpolationSupport = false;
fNoPerspectiveInterpolationSupport = false;
fMultisampleInterpolationSupport = false;
fSampleVariablesSupport = false;
fSampleMaskOverrideCoverageSupport = false;
fExternalTextureSupport = false;
fTexelFetchSupport = false;
fVersionDeclString = nullptr;
fShaderDerivativeExtensionString = nullptr;
fFragCoordConventionsExtensionString = nullptr;
fSecondaryOutputExtensionString = nullptr;
fExternalTextureExtensionString = nullptr;
fTexelBufferExtensionString = nullptr;
fNoPerspectiveInterpolationExtensionString = nullptr;
fMultisampleInterpolationExtensionString = nullptr;
fSampleVariablesExtensionString = nullptr;
fFBFetchColorName = nullptr;
fFBFetchExtensionString = nullptr;
fImageLoadStoreExtensionString = nullptr;
fMaxVertexSamplers = 0;
fMaxGeometrySamplers = 0;
fMaxFragmentSamplers = 0;
fMaxCombinedSamplers = 0;
fMaxVertexImageStorages = 0;
fMaxGeometryImageStorages = 0;
fMaxFragmentImageStorages = 0;
fMaxCombinedImageStorages = 0;
fAdvBlendEqInteraction = kNotSupported_AdvBlendEqInteraction;
}
SkString GrShaderCaps::dump() const {
SkString r;
static const char* gNY[] = { "NO", "YES" };
r.appendf("Shader Derivative Support : %s\n", gNY[fShaderDerivativeSupport]);
r.appendf("Geometry Shader Support : %s\n", gNY[fGeometryShaderSupport]);
r.appendf("Path Rendering Support : %s\n", gNY[fPathRenderingSupport]);
r.appendf("Dst Read In Shader Support : %s\n", gNY[fDstReadInShaderSupport]);
r.appendf("Dual Source Blending Support : %s\n", gNY[fDualSourceBlendingSupport]);
r.appendf("Integer Support : %s\n", gNY[fIntegerSupport]);
r.appendf("Texel Buffer Support : %s\n", gNY[fTexelBufferSupport]);
r.appendf("Image Load Store Support : %s\n", gNY[fImageLoadStoreSupport]);
r.appendf("Shader Float Precisions (varies: %s):\n", gNY[fShaderPrecisionVaries]);
for (int s = 0; s < kGrShaderTypeCount; ++s) {
GrShaderType shaderType = static_cast<GrShaderType>(s);
r.appendf("\t%s:\n", shader_type_to_string(shaderType));
for (int p = 0; p < kGrSLPrecisionCount; ++p) {
if (fFloatPrecisions[s][p].supported()) {
GrSLPrecision precision = static_cast<GrSLPrecision>(p);
r.appendf("\t\t%s: log_low: %d log_high: %d bits: %d\n",
precision_to_string(precision),
fFloatPrecisions[s][p].fLogRangeLow,
fFloatPrecisions[s][p].fLogRangeHigh,
fFloatPrecisions[s][p].fBits);
}
}
}
static const char* kAdvBlendEqInteractionStr[] = {
"Not Supported",
"Automatic",
"General Enable",
"Specific Enables",
};
GR_STATIC_ASSERT(0 == kNotSupported_AdvBlendEqInteraction);
GR_STATIC_ASSERT(1 == kAutomatic_AdvBlendEqInteraction);
GR_STATIC_ASSERT(2 == kGeneralEnable_AdvBlendEqInteraction);
GR_STATIC_ASSERT(3 == kSpecificEnables_AdvBlendEqInteraction);
GR_STATIC_ASSERT(SK_ARRAY_COUNT(kAdvBlendEqInteractionStr) == kLast_AdvBlendEqInteraction + 1);
r.appendf("--- GLSL-Specific ---\n");
r.appendf("FB Fetch Support: %s\n", (fFBFetchSupport ? "YES" : "NO"));
r.appendf("Drops tile on zero divide: %s\n", (fDropsTileOnZeroDivide ? "YES" : "NO"));
r.appendf("Bindless texture support: %s\n", (fBindlessTextureSupport ? "YES" : "NO"));
r.appendf("Uses precision modifiers: %s\n", (fUsesPrecisionModifiers ? "YES" : "NO"));
r.appendf("Can use any() function: %s\n", (fCanUseAnyFunctionInShader ? "YES" : "NO"));
r.appendf("Can use min() and abs() together: %s\n", (fCanUseMinAndAbsTogether ? "YES" : "NO"));
r.appendf("Must force negated atan param to float: %s\n", (fMustForceNegatedAtanParamToFloat ?
"YES" : "NO"));
r.appendf("Must use local out color for FBFetch: %s\n", (fRequiresLocalOutputColorForFBFetch ?
"YES" : "NO"));
r.appendf("Must implement geo shader invocations with loop : %s\n",
(fMustImplementGSInvocationsWithLoop ? "YES" : "NO"));
r.appendf("Flat interpolation support: %s\n", (fFlatInterpolationSupport ? "YES" : "NO"));
r.appendf("No perspective interpolation support: %s\n", (fNoPerspectiveInterpolationSupport ?
"YES" : "NO"));
r.appendf("Multisample interpolation support: %s\n", (fMultisampleInterpolationSupport ?
"YES" : "NO"));
r.appendf("Sample variables support: %s\n", (fSampleVariablesSupport ? "YES" : "NO"));
r.appendf("Sample mask override coverage support: %s\n", (fSampleMaskOverrideCoverageSupport ?
"YES" : "NO"));
r.appendf("External texture support: %s\n", (fExternalTextureSupport ? "YES" : "NO"));
r.appendf("texelFetch support: %s\n", (fTexelFetchSupport ? "YES" : "NO"));
r.appendf("Max VS Samplers: %d\n", fMaxVertexSamplers);
r.appendf("Max GS Samplers: %d\n", fMaxGeometrySamplers);
r.appendf("Max FS Samplers: %d\n", fMaxFragmentSamplers);
r.appendf("Max Combined Samplers: %d\n", fMaxFragmentSamplers);
r.appendf("Max VS Image Storages: %d\n", fMaxVertexImageStorages);
r.appendf("Max GS Image Storages: %d\n", fMaxGeometryImageStorages);
r.appendf("Max FS Image Storages: %d\n", fMaxFragmentImageStorages);
r.appendf("Max Combined Image Storages: %d\n", fMaxFragmentImageStorages);
r.appendf("Advanced blend equation interaction: %s\n",
kAdvBlendEqInteractionStr[fAdvBlendEqInteraction]);
return r;
}
void GrShaderCaps::initSamplerPrecisionTable() {
// Determine the largest precision qualifiers that are effectively the same as lowp/mediump.
// e.g. if lowp == mediump, then use mediump instead of lowp.
GrSLPrecision effectiveMediumP[kGrShaderTypeCount];
GrSLPrecision effectiveLowP[kGrShaderTypeCount];
for (int s = 0; s < kGrShaderTypeCount; ++s) {
const PrecisionInfo* info = fFloatPrecisions[s];
effectiveMediumP[s] = info[kHigh_GrSLPrecision] == info[kMedium_GrSLPrecision] ?
kHigh_GrSLPrecision : kMedium_GrSLPrecision;
effectiveLowP[s] = info[kMedium_GrSLPrecision] == info[kLow_GrSLPrecision] ?
effectiveMediumP[s] : kLow_GrSLPrecision;
}
// Determine which precision qualifiers should be used with samplers.
for (int visibility = 0; visibility < (1 << kGrShaderTypeCount); ++visibility) {
GrSLPrecision mediump = kHigh_GrSLPrecision;
GrSLPrecision lowp = kHigh_GrSLPrecision;
for (int s = 0; s < kGrShaderTypeCount; ++s) {
if (visibility & (1 << s)) {
mediump = SkTMin(mediump, effectiveMediumP[s]);
lowp = SkTMin(lowp, effectiveLowP[s]);
}
GR_STATIC_ASSERT(0 == kLow_GrSLPrecision);
GR_STATIC_ASSERT(1 == kMedium_GrSLPrecision);
GR_STATIC_ASSERT(2 == kHigh_GrSLPrecision);
GR_STATIC_ASSERT((1 << kVertex_GrShaderType) == kVertex_GrShaderFlag);
GR_STATIC_ASSERT((1 << kGeometry_GrShaderType) == kGeometry_GrShaderFlag);
GR_STATIC_ASSERT((1 << kFragment_GrShaderType) == kFragment_GrShaderFlag);
GR_STATIC_ASSERT(3 == kGrShaderTypeCount);
}
uint8_t* table = fSamplerPrecisions[visibility];
table[kUnknown_GrPixelConfig] = lowp;
table[kAlpha_8_GrPixelConfig] = lowp;
table[kGray_8_GrPixelConfig] = lowp;
table[kRGB_565_GrPixelConfig] = lowp;
table[kRGBA_4444_GrPixelConfig] = lowp;
table[kRGBA_8888_GrPixelConfig] = lowp;
table[kBGRA_8888_GrPixelConfig] = lowp;
table[kSRGBA_8888_GrPixelConfig] = lowp;
table[kSBGRA_8888_GrPixelConfig] = lowp;
table[kRGBA_8888_sint_GrPixelConfig] = lowp;
table[kETC1_GrPixelConfig] = lowp;
table[kRGBA_float_GrPixelConfig] = kHigh_GrSLPrecision;
table[kRG_float_GrPixelConfig] = kHigh_GrSLPrecision;
table[kAlpha_half_GrPixelConfig] = mediump;
table[kRGBA_half_GrPixelConfig] = mediump;
GR_STATIC_ASSERT(15 == kGrPixelConfigCnt);
}
}
void GrShaderCaps::applyOptionsOverrides(const GrContextOptions& options) {
fDualSourceBlendingSupport = fDualSourceBlendingSupport && !options.fSuppressDualSourceBlending;
}
|
