SkSLUtil.h 11 KB

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  1. /*
  2. * Copyright 2016 Google Inc.
  3. *
  4. * Use of this source code is governed by a BSD-style license that can be
  5. * found in the LICENSE file.
  6. */
  7. #ifndef SKSL_UTIL
  8. #define SKSL_UTIL
  9. #include <cstdarg>
  10. #include <memory>
  11. #include "stdlib.h"
  12. #include "string.h"
  13. #include "src/sksl/SkSLDefines.h"
  14. #include "src/sksl/SkSLLexer.h"
  15. #ifndef SKSL_STANDALONE
  16. #include "include/core/SkTypes.h"
  17. #if SK_SUPPORT_GPU
  18. #include "include/gpu/GrContextOptions.h"
  19. #include "src/gpu/GrShaderCaps.h"
  20. #endif // SK_SUPPORT_GPU
  21. #endif // SKSL_STANDALONE
  22. class GrShaderCaps;
  23. namespace SkSL {
  24. class OutputStream;
  25. class StringStream;
  26. #if defined(SKSL_STANDALONE) || !SK_SUPPORT_GPU
  27. // we're being compiled standalone, so we don't have access to caps...
  28. enum GrGLSLGeneration {
  29. k110_GrGLSLGeneration,
  30. k130_GrGLSLGeneration,
  31. k140_GrGLSLGeneration,
  32. k150_GrGLSLGeneration,
  33. k330_GrGLSLGeneration,
  34. k400_GrGLSLGeneration,
  35. k420_GrGLSLGeneration,
  36. k310es_GrGLSLGeneration,
  37. k320es_GrGLSLGeneration,
  38. };
  39. #define SKSL_CAPS_CLASS StandaloneShaderCaps
  40. class StandaloneShaderCaps {
  41. public:
  42. GrGLSLGeneration generation() const {
  43. return k400_GrGLSLGeneration;
  44. }
  45. bool atan2ImplementedAsAtanYOverX() const {
  46. return false;
  47. }
  48. bool canUseMinAndAbsTogether() const {
  49. return true;
  50. }
  51. bool mustForceNegatedAtanParamToFloat() const {
  52. return false;
  53. }
  54. bool shaderDerivativeSupport() const {
  55. return true;
  56. }
  57. bool usesPrecisionModifiers() const {
  58. return true;
  59. }
  60. bool mustDeclareFragmentShaderOutput() const {
  61. return true;
  62. }
  63. bool fbFetchSupport() const {
  64. return true;
  65. }
  66. bool fbFetchNeedsCustomOutput() const {
  67. return false;
  68. }
  69. bool flatInterpolationSupport() const {
  70. return true;
  71. }
  72. bool noperspectiveInterpolationSupport() const {
  73. return true;
  74. }
  75. bool multisampleInterpolationSupport() const {
  76. return true;
  77. }
  78. bool sampleVariablesSupport() const {
  79. return true;
  80. }
  81. bool externalTextureSupport() const {
  82. return true;
  83. }
  84. bool mustDoOpBetweenFloorAndAbs() const {
  85. return false;
  86. }
  87. bool mustEnableAdvBlendEqs() const {
  88. return false;
  89. }
  90. bool mustEnableSpecificAdvBlendEqs() const {
  91. return false;
  92. }
  93. bool canUseAnyFunctionInShader() const {
  94. return false;
  95. }
  96. bool floatIs32Bits() const {
  97. return true;
  98. }
  99. bool integerSupport() const {
  100. return false;
  101. }
  102. bool builtinFMASupport() const {
  103. return true;
  104. }
  105. const char* shaderDerivativeExtensionString() const {
  106. return nullptr;
  107. }
  108. const char* fragCoordConventionsExtensionString() const {
  109. return nullptr;
  110. }
  111. const char* geometryShaderExtensionString() const {
  112. return nullptr;
  113. }
  114. const char* gsInvocationsExtensionString() const {
  115. return nullptr;
  116. }
  117. const char* externalTextureExtensionString() const {
  118. return nullptr;
  119. }
  120. const char* secondExternalTextureExtensionString() const {
  121. return nullptr;
  122. }
  123. const char* versionDeclString() const {
  124. return "";
  125. }
  126. bool gsInvocationsSupport() const {
  127. return true;
  128. }
  129. bool canUseFractForNegativeValues() const {
  130. return true;
  131. }
  132. bool canUseFragCoord() const {
  133. return true;
  134. }
  135. bool incompleteShortIntPrecision() const {
  136. return false;
  137. }
  138. bool addAndTrueToLoopCondition() const {
  139. return false;
  140. }
  141. bool unfoldShortCircuitAsTernary() const {
  142. return false;
  143. }
  144. bool emulateAbsIntFunction() const {
  145. return false;
  146. }
  147. bool rewriteDoWhileLoops() const {
  148. return false;
  149. }
  150. bool removePowWithConstantExponent() const {
  151. return false;
  152. }
  153. const char* fbFetchColorName() const {
  154. return nullptr;
  155. }
  156. };
  157. extern StandaloneShaderCaps standaloneCaps;
  158. #else
  159. #define SKSL_CAPS_CLASS GrShaderCaps
  160. // Various sets of caps for use in tests
  161. class ShaderCapsFactory {
  162. public:
  163. static sk_sp<GrShaderCaps> Default() {
  164. sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
  165. result->fVersionDeclString = "#version 400";
  166. result->fShaderDerivativeSupport = true;
  167. return result;
  168. }
  169. static sk_sp<GrShaderCaps> Version450Core() {
  170. sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
  171. result->fVersionDeclString = "#version 450 core";
  172. return result;
  173. }
  174. static sk_sp<GrShaderCaps> Version110() {
  175. sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
  176. result->fVersionDeclString = "#version 110";
  177. result->fGLSLGeneration = GrGLSLGeneration::k110_GrGLSLGeneration;
  178. return result;
  179. }
  180. static sk_sp<GrShaderCaps> UsesPrecisionModifiers() {
  181. sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
  182. result->fVersionDeclString = "#version 400";
  183. result->fUsesPrecisionModifiers = true;
  184. return result;
  185. }
  186. static sk_sp<GrShaderCaps> CannotUseMinAndAbsTogether() {
  187. sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
  188. result->fVersionDeclString = "#version 400";
  189. result->fCanUseMinAndAbsTogether = false;
  190. return result;
  191. }
  192. static sk_sp<GrShaderCaps> CannotUseFractForNegativeValues() {
  193. sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
  194. result->fVersionDeclString = "#version 400";
  195. result->fCanUseFractForNegativeValues = false;
  196. return result;
  197. }
  198. static sk_sp<GrShaderCaps> MustForceNegatedAtanParamToFloat() {
  199. sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
  200. result->fVersionDeclString = "#version 400";
  201. result->fMustForceNegatedAtanParamToFloat = true;
  202. return result;
  203. }
  204. static sk_sp<GrShaderCaps> ShaderDerivativeExtensionString() {
  205. sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
  206. result->fVersionDeclString = "#version 400";
  207. result->fShaderDerivativeSupport = true;
  208. result->fShaderDerivativeExtensionString = "GL_OES_standard_derivatives";
  209. result->fUsesPrecisionModifiers = true;
  210. return result;
  211. }
  212. static sk_sp<GrShaderCaps> FragCoordsOld() {
  213. sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
  214. result->fVersionDeclString = "#version 110";
  215. result->fGLSLGeneration = GrGLSLGeneration::k110_GrGLSLGeneration;
  216. result->fFragCoordConventionsExtensionString = "GL_ARB_fragment_coord_conventions";
  217. return result;
  218. }
  219. static sk_sp<GrShaderCaps> FragCoordsNew() {
  220. sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
  221. result->fVersionDeclString = "#version 400";
  222. result->fFragCoordConventionsExtensionString = "GL_ARB_fragment_coord_conventions";
  223. return result;
  224. }
  225. static sk_sp<GrShaderCaps> GeometryShaderSupport() {
  226. sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
  227. result->fVersionDeclString = "#version 400";
  228. result->fGeometryShaderSupport = true;
  229. result->fGSInvocationsSupport = true;
  230. return result;
  231. }
  232. static sk_sp<GrShaderCaps> NoGSInvocationsSupport() {
  233. sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
  234. result->fVersionDeclString = "#version 400";
  235. result->fGeometryShaderSupport = true;
  236. result->fGSInvocationsSupport = false;
  237. return result;
  238. }
  239. static sk_sp<GrShaderCaps> GeometryShaderExtensionString() {
  240. sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
  241. result->fVersionDeclString = "#version 310es";
  242. result->fGeometryShaderSupport = true;
  243. result->fGeometryShaderExtensionString = "GL_EXT_geometry_shader";
  244. result->fGSInvocationsSupport = true;
  245. return result;
  246. }
  247. static sk_sp<GrShaderCaps> GSInvocationsExtensionString() {
  248. sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
  249. result->fVersionDeclString = "#version 400";
  250. result->fGeometryShaderSupport = true;
  251. result->fGSInvocationsSupport = true;
  252. result->fGSInvocationsExtensionString = "GL_ARB_gpu_shader5";
  253. return result;
  254. }
  255. static sk_sp<GrShaderCaps> VariousCaps() {
  256. sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
  257. result->fVersionDeclString = "#version 400";
  258. result->fExternalTextureSupport = true;
  259. result->fFBFetchSupport = false;
  260. result->fCanUseAnyFunctionInShader = false;
  261. return result;
  262. }
  263. static sk_sp<GrShaderCaps> CannotUseFragCoord() {
  264. sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
  265. result->fVersionDeclString = "#version 400";
  266. result->fCanUseFragCoord = false;
  267. return result;
  268. }
  269. static sk_sp<GrShaderCaps> IncompleteShortIntPrecision() {
  270. sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
  271. result->fVersionDeclString = "#version 310es";
  272. result->fUsesPrecisionModifiers = true;
  273. result->fIncompleteShortIntPrecision = true;
  274. return result;
  275. }
  276. static sk_sp<GrShaderCaps> AddAndTrueToLoopCondition() {
  277. sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
  278. result->fVersionDeclString = "#version 400";
  279. result->fAddAndTrueToLoopCondition = true;
  280. return result;
  281. }
  282. static sk_sp<GrShaderCaps> UnfoldShortCircuitAsTernary() {
  283. sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
  284. result->fVersionDeclString = "#version 400";
  285. result->fUnfoldShortCircuitAsTernary = true;
  286. return result;
  287. }
  288. static sk_sp<GrShaderCaps> EmulateAbsIntFunction() {
  289. sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
  290. result->fVersionDeclString = "#version 400";
  291. result->fEmulateAbsIntFunction = true;
  292. return result;
  293. }
  294. static sk_sp<GrShaderCaps> RewriteDoWhileLoops() {
  295. sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
  296. result->fVersionDeclString = "#version 400";
  297. result->fRewriteDoWhileLoops = true;
  298. return result;
  299. }
  300. static sk_sp<GrShaderCaps> RemovePowWithConstantExponent() {
  301. sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
  302. result->fVersionDeclString = "#version 400";
  303. result->fRemovePowWithConstantExponent = true;
  304. return result;
  305. }
  306. };
  307. #endif
  308. void write_stringstream(const StringStream& d, OutputStream& out);
  309. // Returns true if op is '=' or any compound assignment operator ('+=', '-=', etc.)
  310. bool is_assignment(Token::Kind op);
  311. // Given a compound assignment operator, returns the non-assignment version of the operator (e.g.
  312. // '+=' becomes '+')
  313. Token::Kind remove_assignment(Token::Kind op);
  314. NORETURN void sksl_abort();
  315. } // namespace
  316. #endif