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      1 // Copyright 2016 The SwiftShader Authors. All Rights Reserved.
      2 //
      3 // Licensed under the Apache License, Version 2.0 (the "License");
      4 // you may not use this file except in compliance with the License.
      5 // You may obtain a copy of the License at
      6 //
      7 //    http://www.apache.org/licenses/LICENSE-2.0
      8 //
      9 // Unless required by applicable law or agreed to in writing, software
     10 // distributed under the License is distributed on an "AS IS" BASIS,
     11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     12 // See the License for the specific language governing permissions and
     13 // limitations under the License.
     14 
     15 #ifndef sw_Surface_hpp
     16 #define sw_Surface_hpp
     17 
     18 #include "Color.hpp"
     19 #include "Main/Config.hpp"
     20 #include "Common/Resource.hpp"
     21 
     22 namespace sw
     23 {
     24 	class Resource;
     25 
     26 	template <typename T> struct RectT
     27 	{
     28 		RectT() {}
     29 		RectT(T x0i, T y0i, T x1i, T y1i) : x0(x0i), y0(y0i), x1(x1i), y1(y1i) {}
     30 
     31 		void clip(T minX, T minY, T maxX, T maxY)
     32 		{
     33 			x0 = clamp(x0, minX, maxX);
     34 			y0 = clamp(y0, minY, maxY);
     35 			x1 = clamp(x1, minX, maxX);
     36 			y1 = clamp(y1, minY, maxY);
     37 		}
     38 
     39 		T width() const  { return x1 - x0; }
     40 		T height() const { return y1 - y0; }
     41 
     42 		T x0;   // Inclusive
     43 		T y0;   // Inclusive
     44 		T x1;   // Exclusive
     45 		T y1;   // Exclusive
     46 	};
     47 
     48 	typedef RectT<int> Rect;
     49 	typedef RectT<float> RectF;
     50 
     51 	template<typename T> struct SliceRectT : public RectT<T>
     52 	{
     53 		SliceRectT() : slice(0) {}
     54 		SliceRectT(const RectT<T>& rect) : RectT<T>(rect), slice(0) {}
     55 		SliceRectT(const RectT<T>& rect, int s) : RectT<T>(rect), slice(s) {}
     56 		SliceRectT(T x0, T y0, T x1, T y1, int s) : RectT<T>(x0, y0, x1, y1), slice(s) {}
     57 		int slice;
     58 	};
     59 
     60 	typedef SliceRectT<int> SliceRect;
     61 	typedef SliceRectT<float> SliceRectF;
     62 
     63 	enum Format : unsigned char
     64 	{
     65 		FORMAT_NULL,
     66 
     67 		FORMAT_A8,
     68 		FORMAT_R8I,
     69 		FORMAT_R8UI,
     70 		FORMAT_R8_SNORM,
     71 		FORMAT_R8,
     72 		FORMAT_R16I,
     73 		FORMAT_R16UI,
     74 		FORMAT_R32I,
     75 		FORMAT_R32UI,
     76 		FORMAT_R3G3B2,
     77 		FORMAT_A8R3G3B2,
     78 		FORMAT_X4R4G4B4,
     79 		FORMAT_A4R4G4B4,
     80 		FORMAT_R4G4B4A4,
     81 		FORMAT_R5G6B5,
     82 		FORMAT_R8G8B8,
     83 		FORMAT_B8G8R8,
     84 		FORMAT_X8R8G8B8,
     85 		FORMAT_A8R8G8B8,
     86 		FORMAT_X8B8G8R8I,
     87 		FORMAT_X8B8G8R8UI,
     88 		FORMAT_X8B8G8R8_SNORM,
     89 		FORMAT_X8B8G8R8,
     90 		FORMAT_A8B8G8R8I,
     91 		FORMAT_A8B8G8R8UI,
     92 		FORMAT_A8B8G8R8_SNORM,
     93 		FORMAT_A8B8G8R8,
     94 		FORMAT_SRGB8_X8,
     95 		FORMAT_SRGB8_A8,
     96 		FORMAT_X1R5G5B5,
     97 		FORMAT_A1R5G5B5,
     98 		FORMAT_R5G5B5A1,
     99 		FORMAT_G8R8I,
    100 		FORMAT_G8R8UI,
    101 		FORMAT_G8R8_SNORM,
    102 		FORMAT_G8R8,
    103 		FORMAT_G16R16,
    104 		FORMAT_G16R16I,
    105 		FORMAT_G16R16UI,
    106 		FORMAT_G32R32I,
    107 		FORMAT_G32R32UI,
    108 		FORMAT_A2R10G10B10,
    109 		FORMAT_A2B10G10R10,
    110 		FORMAT_A2B10G10R10UI,
    111 		FORMAT_A16B16G16R16,
    112 		FORMAT_X16B16G16R16I,
    113 		FORMAT_X16B16G16R16UI,
    114 		FORMAT_A16B16G16R16I,
    115 		FORMAT_A16B16G16R16UI,
    116 		FORMAT_X32B32G32R32I,
    117 		FORMAT_X32B32G32R32UI,
    118 		FORMAT_A32B32G32R32I,
    119 		FORMAT_A32B32G32R32UI,
    120 		// Paletted formats
    121 		FORMAT_P8,
    122 		FORMAT_A8P8,
    123 		// Compressed formats
    124 		FORMAT_DXT1,
    125 		FORMAT_DXT3,
    126 		FORMAT_DXT5,
    127 		FORMAT_ATI1,
    128 		FORMAT_ATI2,
    129 		FORMAT_ETC1,
    130 		FORMAT_R11_EAC,
    131 		FORMAT_SIGNED_R11_EAC,
    132 		FORMAT_RG11_EAC,
    133 		FORMAT_SIGNED_RG11_EAC,
    134 		FORMAT_RGB8_ETC2,
    135 		FORMAT_SRGB8_ETC2,
    136 		FORMAT_RGB8_PUNCHTHROUGH_ALPHA1_ETC2,
    137 		FORMAT_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2,
    138 		FORMAT_RGBA8_ETC2_EAC,
    139 		FORMAT_SRGB8_ALPHA8_ETC2_EAC,
    140 		FORMAT_RGBA_ASTC_4x4_KHR,
    141 		FORMAT_RGBA_ASTC_5x4_KHR,
    142 		FORMAT_RGBA_ASTC_5x5_KHR,
    143 		FORMAT_RGBA_ASTC_6x5_KHR,
    144 		FORMAT_RGBA_ASTC_6x6_KHR,
    145 		FORMAT_RGBA_ASTC_8x5_KHR,
    146 		FORMAT_RGBA_ASTC_8x6_KHR,
    147 		FORMAT_RGBA_ASTC_8x8_KHR,
    148 		FORMAT_RGBA_ASTC_10x5_KHR,
    149 		FORMAT_RGBA_ASTC_10x6_KHR,
    150 		FORMAT_RGBA_ASTC_10x8_KHR,
    151 		FORMAT_RGBA_ASTC_10x10_KHR,
    152 		FORMAT_RGBA_ASTC_12x10_KHR,
    153 		FORMAT_RGBA_ASTC_12x12_KHR,
    154 		FORMAT_SRGB8_ALPHA8_ASTC_4x4_KHR,
    155 		FORMAT_SRGB8_ALPHA8_ASTC_5x4_KHR,
    156 		FORMAT_SRGB8_ALPHA8_ASTC_5x5_KHR,
    157 		FORMAT_SRGB8_ALPHA8_ASTC_6x5_KHR,
    158 		FORMAT_SRGB8_ALPHA8_ASTC_6x6_KHR,
    159 		FORMAT_SRGB8_ALPHA8_ASTC_8x5_KHR,
    160 		FORMAT_SRGB8_ALPHA8_ASTC_8x6_KHR,
    161 		FORMAT_SRGB8_ALPHA8_ASTC_8x8_KHR,
    162 		FORMAT_SRGB8_ALPHA8_ASTC_10x5_KHR,
    163 		FORMAT_SRGB8_ALPHA8_ASTC_10x6_KHR,
    164 		FORMAT_SRGB8_ALPHA8_ASTC_10x8_KHR,
    165 		FORMAT_SRGB8_ALPHA8_ASTC_10x10_KHR,
    166 		FORMAT_SRGB8_ALPHA8_ASTC_12x10_KHR,
    167 		FORMAT_SRGB8_ALPHA8_ASTC_12x12_KHR,
    168 		// Floating-point formats
    169 		FORMAT_A16F,
    170 		FORMAT_R16F,
    171 		FORMAT_G16R16F,
    172 		FORMAT_B16G16R16F,
    173 		FORMAT_X16B16G16R16F,
    174 		FORMAT_A16B16G16R16F,
    175 		FORMAT_X16B16G16R16F_UNSIGNED,
    176 		FORMAT_A32F,
    177 		FORMAT_R32F,
    178 		FORMAT_G32R32F,
    179 		FORMAT_B32G32R32F,
    180 		FORMAT_X32B32G32R32F,
    181 		FORMAT_A32B32G32R32F,
    182 		FORMAT_X32B32G32R32F_UNSIGNED,
    183 		// Bump map formats
    184 		FORMAT_V8U8,
    185 		FORMAT_L6V5U5,
    186 		FORMAT_Q8W8V8U8,
    187 		FORMAT_X8L8V8U8,
    188 		FORMAT_A2W10V10U10,
    189 		FORMAT_V16U16,
    190 		FORMAT_A16W16V16U16,
    191 		FORMAT_Q16W16V16U16,
    192 		// Luminance formats
    193 		FORMAT_L8,
    194 		FORMAT_A4L4,
    195 		FORMAT_L16,
    196 		FORMAT_A8L8,
    197 		FORMAT_L16F,
    198 		FORMAT_A16L16F,
    199 		FORMAT_L32F,
    200 		FORMAT_A32L32F,
    201 		// Depth/stencil formats
    202 		FORMAT_D16,
    203 		FORMAT_D32,
    204 		FORMAT_D24X8,
    205 		FORMAT_D24S8,
    206 		FORMAT_D24FS8,
    207 		FORMAT_D32F,                 // Quad layout
    208 		FORMAT_D32FS8,               // Quad layout
    209 		FORMAT_D32F_COMPLEMENTARY,   // Quad layout, 1 - z
    210 		FORMAT_D32FS8_COMPLEMENTARY, // Quad layout, 1 - z
    211 		FORMAT_D32F_LOCKABLE,        // Linear layout
    212 		FORMAT_D32FS8_TEXTURE,       // Linear layout, no PCF
    213 		FORMAT_D32F_SHADOW,          // Linear layout, PCF
    214 		FORMAT_D32FS8_SHADOW,        // Linear layout, PCF
    215 		FORMAT_DF24S8,
    216 		FORMAT_DF16S8,
    217 		FORMAT_INTZ,
    218 		FORMAT_S8,
    219 		// Quad layout framebuffer
    220 		FORMAT_X8G8R8B8Q,
    221 		FORMAT_A8G8R8B8Q,
    222 		// YUV formats
    223 		FORMAT_YV12_BT601,
    224 		FORMAT_YV12_BT709,
    225 		FORMAT_YV12_JFIF,    // Full-swing BT.601
    226 
    227 		FORMAT_LAST = FORMAT_YV12_JFIF
    228 	};
    229 
    230 	enum Lock
    231 	{
    232 		LOCK_UNLOCKED,
    233 		LOCK_READONLY,
    234 		LOCK_WRITEONLY,
    235 		LOCK_READWRITE,
    236 		LOCK_DISCARD,
    237 		LOCK_UPDATE   // Write access which doesn't dirty the buffer, because it's being updated with the sibling's data.
    238 	};
    239 
    240 	class [[clang::lto_visibility_public]] Surface
    241 	{
    242 	private:
    243 		struct Buffer
    244 		{
    245 			friend Surface;
    246 
    247 		private:
    248 			void write(int x, int y, int z, const Color<float> &color);
    249 			void write(int x, int y, const Color<float> &color);
    250 			void write(void *element, const Color<float> &color);
    251 			Color<float> read(int x, int y, int z) const;
    252 			Color<float> read(int x, int y) const;
    253 			Color<float> read(void *element) const;
    254 			Color<float> sample(float x, float y, float z) const;
    255 			Color<float> sample(float x, float y, int layer) const;
    256 
    257 			void *lockRect(int x, int y, int z, Lock lock);
    258 			void unlockRect();
    259 
    260 			void *buffer;
    261 			int width;
    262 			int height;
    263 			int depth;
    264 			short border;
    265 			short samples;
    266 
    267 			int bytes;
    268 			int pitchB;
    269 			int pitchP;
    270 			int sliceB;
    271 			int sliceP;
    272 
    273 			Format format;
    274 			AtomicInt lock;
    275 
    276 			bool dirty;   // Sibling internal/external buffer doesn't match.
    277 		};
    278 
    279 	protected:
    280 		Surface(int width, int height, int depth, Format format, void *pixels, int pitch, int slice);
    281 		Surface(Resource *texture, int width, int height, int depth, int border, int samples, Format format, bool lockable, bool renderTarget, int pitchP = 0);
    282 
    283 	public:
    284 		static Surface *create(int width, int height, int depth, Format format, void *pixels, int pitch, int slice);
    285 		static Surface *create(Resource *texture, int width, int height, int depth, int border, int samples, Format format, bool lockable, bool renderTarget, int pitchP = 0);
    286 
    287 		virtual ~Surface() = 0;
    288 
    289 		inline void *lock(int x, int y, int z, Lock lock, Accessor client, bool internal = false);
    290 		inline void unlock(bool internal = false);
    291 		inline int getWidth() const;
    292 		inline int getHeight() const;
    293 		inline int getDepth() const;
    294 		inline int getBorder() const;
    295 		inline Format getFormat(bool internal = false) const;
    296 		inline int getPitchB(bool internal = false) const;
    297 		inline int getPitchP(bool internal = false) const;
    298 		inline int getSliceB(bool internal = false) const;
    299 		inline int getSliceP(bool internal = false) const;
    300 
    301 		void *lockExternal(int x, int y, int z, Lock lock, Accessor client);
    302 		void unlockExternal();
    303 		inline Format getExternalFormat() const;
    304 		inline int getExternalPitchB() const;
    305 		inline int getExternalPitchP() const;
    306 		inline int getExternalSliceB() const;
    307 		inline int getExternalSliceP() const;
    308 
    309 		virtual void *lockInternal(int x, int y, int z, Lock lock, Accessor client) = 0;
    310 		virtual void unlockInternal() = 0;
    311 		inline Format getInternalFormat() const;
    312 		inline int getInternalPitchB() const;
    313 		inline int getInternalPitchP() const;
    314 		inline int getInternalSliceB() const;
    315 		inline int getInternalSliceP() const;
    316 
    317 		void *lockStencil(int x, int y, int front, Accessor client);
    318 		void unlockStencil();
    319 		inline Format getStencilFormat() const;
    320 		inline int getStencilPitchB() const;
    321 		inline int getStencilSliceB() const;
    322 
    323 		void sync();                      // Wait for lock(s) to be released.
    324 		inline bool isUnlocked() const;   // Only reliable after sync().
    325 
    326 		inline int getSamples() const;
    327 		inline int getMultiSampleCount() const;
    328 		inline int getSuperSampleCount() const;
    329 
    330 		bool isEntire(const Rect& rect) const;
    331 		Rect getRect() const;
    332 		void clearDepth(float depth, int x0, int y0, int width, int height);
    333 		void clearStencil(unsigned char stencil, unsigned char mask, int x0, int y0, int width, int height);
    334 		void fill(const Color<float> &color, int x0, int y0, int width, int height);
    335 
    336 		Color<float> readExternal(int x, int y, int z) const;
    337 		Color<float> readExternal(int x, int y) const;
    338 		Color<float> sampleExternal(float x, float y, float z) const;
    339 		Color<float> sampleExternal(float x, float y) const;
    340 		void writeExternal(int x, int y, int z, const Color<float> &color);
    341 		void writeExternal(int x, int y, const Color<float> &color);
    342 
    343 		void copyInternal(const Surface* src, int x, int y, float srcX, float srcY, bool filter);
    344 		void copyInternal(const Surface* src, int x, int y, int z, float srcX, float srcY, float srcZ, bool filter);
    345 
    346 		enum Edge { TOP, BOTTOM, RIGHT, LEFT };
    347 		void copyCubeEdge(Edge dstEdge, Surface *src, Edge srcEdge);
    348 		void computeCubeCorner(int x0, int y0, int x1, int y1);
    349 
    350 		bool hasStencil() const;
    351 		bool hasDepth() const;
    352 		bool hasPalette() const;
    353 		bool isRenderTarget() const;
    354 
    355 		bool hasDirtyContents() const;
    356 		void markContentsClean();
    357 		inline bool isExternalDirty() const;
    358 		Resource *getResource();
    359 
    360 		static int bytes(Format format);
    361 		static int pitchB(int width, int border, Format format, bool target);
    362 		static int pitchP(int width, int border, Format format, bool target);
    363 		static int sliceB(int width, int height, int border, Format format, bool target);
    364 		static int sliceP(int width, int height, int border, Format format, bool target);
    365 		static unsigned int size(int width, int height, int depth, int border, int samples, Format format);   // FIXME: slice * depth
    366 
    367 		static bool isStencil(Format format);
    368 		static bool isDepth(Format format);
    369 		static bool hasQuadLayout(Format format);
    370 		static bool isPalette(Format format);
    371 
    372 		static bool isFloatFormat(Format format);
    373 		static bool isUnsignedComponent(Format format, int component);
    374 		static bool isSRGBreadable(Format format);
    375 		static bool isSRGBwritable(Format format);
    376 		static bool isSRGBformat(Format format);
    377 		static bool isCompressed(Format format);
    378 		static bool isSignedNonNormalizedInteger(Format format);
    379 		static bool isUnsignedNonNormalizedInteger(Format format);
    380 		static bool isNonNormalizedInteger(Format format);
    381 		static bool isNormalizedInteger(Format format);
    382 		static int componentCount(Format format);
    383 
    384 		static void setTexturePalette(unsigned int *palette);
    385 
    386 	private:
    387 		sw::Resource *resource;
    388 
    389 		typedef unsigned char byte;
    390 		typedef unsigned short word;
    391 		typedef unsigned int dword;
    392 		typedef uint64_t qword;
    393 
    394 		struct DXT1
    395 		{
    396 			word c0;
    397 			word c1;
    398 			dword lut;
    399 		};
    400 
    401 		struct DXT3
    402 		{
    403 			qword a;
    404 
    405 			word c0;
    406 			word c1;
    407 			dword lut;
    408 		};
    409 
    410 		struct DXT5
    411 		{
    412 			union
    413 			{
    414 				struct
    415 				{
    416 					byte a0;
    417 					byte a1;
    418 				};
    419 
    420 				qword alut;   // Skip first 16 bit
    421 			};
    422 
    423 			word c0;
    424 			word c1;
    425 			dword clut;
    426 		};
    427 
    428 		struct ATI2
    429 		{
    430 			union
    431 			{
    432 				struct
    433 				{
    434 					byte y0;
    435 					byte y1;
    436 				};
    437 
    438 				qword ylut;   // Skip first 16 bit
    439 			};
    440 
    441 			union
    442 			{
    443 				struct
    444 				{
    445 					byte x0;
    446 					byte x1;
    447 				};
    448 
    449 				qword xlut;   // Skip first 16 bit
    450 			};
    451 		};
    452 
    453 		struct ATI1
    454 		{
    455 			union
    456 			{
    457 				struct
    458 				{
    459 					byte r0;
    460 					byte r1;
    461 				};
    462 
    463 				qword rlut;   // Skip first 16 bit
    464 			};
    465 		};
    466 
    467 		static void decodeR8G8B8(Buffer &destination, Buffer &source);
    468 		static void decodeX1R5G5B5(Buffer &destination, Buffer &source);
    469 		static void decodeA1R5G5B5(Buffer &destination, Buffer &source);
    470 		static void decodeX4R4G4B4(Buffer &destination, Buffer &source);
    471 		static void decodeA4R4G4B4(Buffer &destination, Buffer &source);
    472 		static void decodeP8(Buffer &destination, Buffer &source);
    473 
    474 		static void decodeDXT1(Buffer &internal, Buffer &external);
    475 		static void decodeDXT3(Buffer &internal, Buffer &external);
    476 		static void decodeDXT5(Buffer &internal, Buffer &external);
    477 		static void decodeATI1(Buffer &internal, Buffer &external);
    478 		static void decodeATI2(Buffer &internal, Buffer &external);
    479 		static void decodeEAC(Buffer &internal, Buffer &external, int nbChannels, bool isSigned);
    480 		static void decodeETC2(Buffer &internal, Buffer &external, int nbAlphaBits, bool isSRGB);
    481 		static void decodeASTC(Buffer &internal, Buffer &external, int xSize, int ySize, int zSize, bool isSRGB);
    482 
    483 		static void update(Buffer &destination, Buffer &source);
    484 		static void genericUpdate(Buffer &destination, Buffer &source);
    485 		static void *allocateBuffer(int width, int height, int depth, int border, int samples, Format format);
    486 		static void memfill4(void *buffer, int pattern, int bytes);
    487 
    488 		bool identicalFormats() const;
    489 		Format selectInternalFormat(Format format) const;
    490 
    491 		void resolve();
    492 
    493 		Buffer external;
    494 		Buffer internal;
    495 		Buffer stencil;
    496 
    497 		const bool lockable;
    498 		const bool renderTarget;
    499 
    500 		bool dirtyContents;   // Sibling surfaces need updating (mipmaps / cube borders).
    501 		unsigned int paletteUsed;
    502 
    503 		static unsigned int *palette;   // FIXME: Not multi-device safe
    504 		static unsigned int paletteID;
    505 
    506 		bool hasParent;
    507 		bool ownExternal;
    508 	};
    509 }
    510 
    511 #undef min
    512 #undef max
    513 
    514 namespace sw
    515 {
    516 	void *Surface::lock(int x, int y, int z, Lock lock, Accessor client, bool internal)
    517 	{
    518 		return internal ? lockInternal(x, y, z, lock, client) : lockExternal(x, y, z, lock, client);
    519 	}
    520 
    521 	void Surface::unlock(bool internal)
    522 	{
    523 		return internal ? unlockInternal() : unlockExternal();
    524 	}
    525 
    526 	int Surface::getWidth() const
    527 	{
    528 		return external.width;
    529 	}
    530 
    531 	int Surface::getHeight() const
    532 	{
    533 		return external.height;
    534 	}
    535 
    536 	int Surface::getDepth() const
    537 	{
    538 		return external.depth;
    539 	}
    540 
    541 	int Surface::getBorder() const
    542 	{
    543 		return internal.border;
    544 	}
    545 
    546 	Format Surface::getFormat(bool internal) const
    547 	{
    548 		return internal ? getInternalFormat() : getExternalFormat();
    549 	}
    550 
    551 	int Surface::getPitchB(bool internal) const
    552 	{
    553 		return internal ? getInternalPitchB() : getExternalPitchB();
    554 	}
    555 
    556 	int Surface::getPitchP(bool internal) const
    557 	{
    558 		return internal ? getInternalPitchP() : getExternalPitchP();
    559 	}
    560 
    561 	int Surface::getSliceB(bool internal) const
    562 	{
    563 		return internal ? getInternalSliceB() : getExternalSliceB();
    564 	}
    565 
    566 	int Surface::getSliceP(bool internal) const
    567 	{
    568 		return internal ? getInternalSliceP() : getExternalSliceP();
    569 	}
    570 
    571 	Format Surface::getExternalFormat() const
    572 	{
    573 		return external.format;
    574 	}
    575 
    576 	int Surface::getExternalPitchB() const
    577 	{
    578 		return external.pitchB;
    579 	}
    580 
    581 	int Surface::getExternalPitchP() const
    582 	{
    583 		return external.pitchP;
    584 	}
    585 
    586 	int Surface::getExternalSliceB() const
    587 	{
    588 		return external.sliceB;
    589 	}
    590 
    591 	int Surface::getExternalSliceP() const
    592 	{
    593 		return external.sliceP;
    594 	}
    595 
    596 	Format Surface::getInternalFormat() const
    597 	{
    598 		return internal.format;
    599 	}
    600 
    601 	int Surface::getInternalPitchB() const
    602 	{
    603 		return internal.pitchB;
    604 	}
    605 
    606 	int Surface::getInternalPitchP() const
    607 	{
    608 		return internal.pitchP;
    609 	}
    610 
    611 	int Surface::getInternalSliceB() const
    612 	{
    613 		return internal.sliceB;
    614 	}
    615 
    616 	int Surface::getInternalSliceP() const
    617 	{
    618 		return internal.sliceP;
    619 	}
    620 
    621 	Format Surface::getStencilFormat() const
    622 	{
    623 		return stencil.format;
    624 	}
    625 
    626 	int Surface::getStencilPitchB() const
    627 	{
    628 		return stencil.pitchB;
    629 	}
    630 
    631 	int Surface::getStencilSliceB() const
    632 	{
    633 		return stencil.sliceB;
    634 	}
    635 
    636 	int Surface::getSamples() const
    637 	{
    638 		return internal.samples;
    639 	}
    640 
    641 	int Surface::getMultiSampleCount() const
    642 	{
    643 		return sw::min((int)internal.samples, 4);
    644 	}
    645 
    646 	int Surface::getSuperSampleCount() const
    647 	{
    648 		return internal.samples > 4 ? internal.samples / 4 : 1;
    649 	}
    650 
    651 	bool Surface::isUnlocked() const
    652 	{
    653 		return external.lock == LOCK_UNLOCKED &&
    654 		       internal.lock == LOCK_UNLOCKED &&
    655 		       stencil.lock == LOCK_UNLOCKED;
    656 	}
    657 
    658 	bool Surface::isExternalDirty() const
    659 	{
    660 		return external.buffer && external.buffer != internal.buffer && external.dirty;
    661 	}
    662 }
    663 
    664 #endif   // sw_Surface_hpp
    665