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1 /* | 1 /* |
2 * Copyright 2012 Google Inc. | 2 * Copyright 2012 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 | 8 |
9 #ifndef GrGLCaps_DEFINED | 9 #ifndef GrGLCaps_DEFINED |
10 #define GrGLCaps_DEFINED | 10 #define GrGLCaps_DEFINED |
11 | 11 |
12 #include "GrCaps.h" | 12 #include "GrCaps.h" |
13 #include "GrGLSL.h" | 13 #include "glsl/GrGLSL.h" |
14 #include "GrGLStencilAttachment.h" | 14 #include "GrGLStencilAttachment.h" |
15 #include "SkChecksum.h" | 15 #include "SkChecksum.h" |
16 #include "SkTHash.h" | 16 #include "SkTHash.h" |
17 #include "SkTArray.h" | 17 #include "SkTArray.h" |
18 | 18 |
19 class GrGLContextInfo; | 19 class GrGLContextInfo; |
20 class GrGLSLCaps; | 20 class GrGLSLCaps; |
21 | 21 |
22 /** | 22 /** |
23 * Stores some capabilities of a GL context. Most are determined by the GL | 23 * Stores some capabilities of a GL context. Most are determined by the GL |
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321 | 321 |
322 void initFSAASupport(const GrGLContextInfo&, const GrGLInterface*); | 322 void initFSAASupport(const GrGLContextInfo&, const GrGLInterface*); |
323 void initBlendEqationSupport(const GrGLContextInfo&); | 323 void initBlendEqationSupport(const GrGLContextInfo&); |
324 void initStencilFormats(const GrGLContextInfo&); | 324 void initStencilFormats(const GrGLContextInfo&); |
325 // This must be called after initFSAASupport(). | 325 // This must be called after initFSAASupport(). |
326 void initConfigRenderableTable(const GrGLContextInfo&); | 326 void initConfigRenderableTable(const GrGLContextInfo&); |
327 void initConfigTexturableTable(const GrGLContextInfo&, const GrGLInterface*)
; | 327 void initConfigTexturableTable(const GrGLContextInfo&, const GrGLInterface*)
; |
328 | 328 |
329 bool doReadPixelsSupported(const GrGLInterface* intf, GrGLenum format, GrGLe
num type) const; | 329 bool doReadPixelsSupported(const GrGLInterface* intf, GrGLenum format, GrGLe
num type) const; |
330 | 330 |
| 331 void initShaderPrecisionTable(const GrGLContextInfo& ctxInfo, |
| 332 const GrGLInterface* intf, |
| 333 GrGLSLCaps* glslCaps); |
| 334 |
331 // tracks configs that have been verified to pass the FBO completeness when | 335 // tracks configs that have been verified to pass the FBO completeness when |
332 // used as a color attachment | 336 // used as a color attachment |
333 VerifiedColorConfigs fVerifiedColorConfigs; | 337 VerifiedColorConfigs fVerifiedColorConfigs; |
334 | 338 |
335 SkTArray<StencilFormat, true> fStencilFormats; | 339 SkTArray<StencilFormat, true> fStencilFormats; |
336 // tracks configs that have been verified to pass the FBO completeness when | 340 // tracks configs that have been verified to pass the FBO completeness when |
337 // used as a color attachment when a particular stencil format is used | 341 // used as a color attachment when a particular stencil format is used |
338 // as a stencil attachment. | 342 // as a stencil attachment. |
339 SkTArray<VerifiedColorConfigs, true> fStencilVerifiedColorConfigs; | 343 SkTArray<VerifiedColorConfigs, true> fStencilVerifiedColorConfigs; |
340 | 344 |
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380 return fFormat == rhs.fFormat | 384 return fFormat == rhs.fFormat |
381 && fType == rhs.fType | 385 && fType == rhs.fType |
382 && fFboFormat == rhs.fFboFormat; | 386 && fFboFormat == rhs.fFboFormat; |
383 } | 387 } |
384 }; | 388 }; |
385 mutable SkTHashMap<ReadPixelsSupportedFormat, bool> fReadPixelsSupportedCach
e; | 389 mutable SkTHashMap<ReadPixelsSupportedFormat, bool> fReadPixelsSupportedCach
e; |
386 | 390 |
387 typedef GrCaps INHERITED; | 391 typedef GrCaps INHERITED; |
388 }; | 392 }; |
389 | 393 |
390 class GrGLSLCaps : public GrShaderCaps { | |
391 public: | |
392 SK_DECLARE_INST_COUNT(GrGLSLCaps) | |
393 | |
394 /** | |
395 * Indicates how GLSL must interact with advanced blend equations. The KHR ex
tension requires | |
396 * special layout qualifiers in the fragment shader. | |
397 */ | |
398 enum AdvBlendEqInteraction { | |
399 kNotSupported_AdvBlendEqInteraction, //<! No _blend_equation_advance
d extension | |
400 kAutomatic_AdvBlendEqInteraction, //<! No interaction required | |
401 kGeneralEnable_AdvBlendEqInteraction, //<! layout(blend_support_all_e
quations) out | |
402 kSpecificEnables_AdvBlendEqInteraction, //<! Specific layout qualifiers
per equation | |
403 | |
404 kLast_AdvBlendEqInteraction = kSpecificEnables_AdvBlendEqInteraction | |
405 }; | |
406 | |
407 /** | |
408 * Initializes the GrGLSLCaps to the set of features supported in the curren
t | |
409 * OpenGL context accessible via ctxInfo. | |
410 */ | |
411 GrGLSLCaps(const GrContextOptions&, const GrGLContextInfo&, const GrGLInterf
ace*, | |
412 const GrGLCaps&); | |
413 | |
414 /** | |
415 * Some helper functions for encapsulating various extensions to read FB Buf
fer on openglES | |
416 * | |
417 * TODO(joshualitt) On desktop opengl 4.2+ we can achieve something similar
to this effect | |
418 */ | |
419 bool fbFetchSupport() const { return fFBFetchSupport; } | |
420 | |
421 bool fbFetchNeedsCustomOutput() const { return fFBFetchNeedsCustomOutput; } | |
422 | |
423 bool bindlessTextureSupport() const { return fBindlessTextureSupport; } | |
424 | |
425 const char* fbFetchColorName() const { return fFBFetchColorName; } | |
426 | |
427 const char* fbFetchExtensionString() const { return fFBFetchExtensionString;
} | |
428 | |
429 bool dropsTileOnZeroDivide() const { return fDropsTileOnZeroDivide; } | |
430 | |
431 AdvBlendEqInteraction advBlendEqInteraction() const { return fAdvBlendEqInte
raction; } | |
432 | |
433 bool mustEnableAdvBlendEqs() const { | |
434 return fAdvBlendEqInteraction >= kGeneralEnable_AdvBlendEqInteraction; | |
435 } | |
436 | |
437 bool mustEnableSpecificAdvBlendEqs() const { | |
438 return fAdvBlendEqInteraction == kSpecificEnables_AdvBlendEqInteraction; | |
439 } | |
440 | |
441 bool mustDeclareFragmentShaderOutput() const { | |
442 return fGLSLGeneration > k110_GrGLSLGeneration; | |
443 } | |
444 | |
445 GrGLSLGeneration generation() const { return fGLSLGeneration; } | |
446 | |
447 /** | |
448 * Returns a string containing the caps info. | |
449 */ | |
450 SkString dump() const override; | |
451 | |
452 private: | |
453 // Must be called after fGeometryShaderSupport is initialized. | |
454 void initShaderPrecisionTable(const GrGLContextInfo&, const GrGLInterface*); | |
455 | |
456 GrGLSLGeneration fGLSLGeneration; | |
457 | |
458 bool fDropsTileOnZeroDivide : 1; | |
459 bool fFBFetchSupport : 1; | |
460 bool fFBFetchNeedsCustomOutput : 1; | |
461 bool fBindlessTextureSupport : 1; | |
462 | |
463 const char* fFBFetchColorName; | |
464 const char* fFBFetchExtensionString; | |
465 | |
466 AdvBlendEqInteraction fAdvBlendEqInteraction; | |
467 | |
468 friend class GrGLCaps; // For initialization. | |
469 | |
470 typedef GrShaderCaps INHERITED; | |
471 }; | |
472 | |
473 | |
474 #endif | 394 #endif |
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