| |
| /* |
| * Copyright 2010 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| |
| |
| #ifndef GrTypes_DEFINED |
| #define GrTypes_DEFINED |
| |
| #include "SkTypes.h" |
| #include "GrConfig.h" |
| #include "SkMath.h" |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| /** |
| * Defines overloaded bitwise operators to make it easier to use an enum as a |
| * bitfield. |
| */ |
| #define GR_MAKE_BITFIELD_OPS(X) \ |
| inline X operator | (X a, X b) { \ |
| return (X) (+a | +b); \ |
| } \ |
| \ |
| inline X operator & (X a, X b) { \ |
| return (X) (+a & +b); \ |
| } \ |
| template <typename T> \ |
| inline X operator & (T a, X b) { \ |
| return (X) (+a & +b); \ |
| } \ |
| template <typename T> \ |
| inline X operator & (X a, T b) { \ |
| return (X) (+a & +b); \ |
| } \ |
| |
| #define GR_DECL_BITFIELD_OPS_FRIENDS(X) \ |
| friend X operator | (X a, X b); \ |
| \ |
| friend X operator & (X a, X b); \ |
| \ |
| template <typename T> \ |
| friend X operator & (T a, X b); \ |
| \ |
| template <typename T> \ |
| friend X operator & (X a, T b); \ |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| |
| /** |
| * Macro to round n up to the next multiple of 4, or return it unchanged if |
| * n is already a multiple of 4 |
| */ |
| #define GrALIGN4(n) SkAlign4(n) |
| #define GrIsALIGN4(n) SkIsAlign4(n) |
| |
| template <typename T> const T& GrMin(const T& a, const T& b) { |
| return (a < b) ? a : b; |
| } |
| |
| template <typename T> const T& GrMax(const T& a, const T& b) { |
| return (b < a) ? a : b; |
| } |
| |
| // compile time versions of min/max |
| #define GR_CT_MAX(a, b) (((b) < (a)) ? (a) : (b)) |
| #define GR_CT_MIN(a, b) (((b) < (a)) ? (b) : (a)) |
| |
| /** |
| * divide, rounding up |
| */ |
| static inline int32_t GrIDivRoundUp(int x, int y) { |
| SkASSERT(y > 0); |
| return (x + (y-1)) / y; |
| } |
| static inline uint32_t GrUIDivRoundUp(uint32_t x, uint32_t y) { |
| return (x + (y-1)) / y; |
| } |
| static inline size_t GrSizeDivRoundUp(size_t x, size_t y) { |
| return (x + (y-1)) / y; |
| } |
| |
| // compile time, evaluates Y multiple times |
| #define GR_CT_DIV_ROUND_UP(X, Y) (((X) + ((Y)-1)) / (Y)) |
| |
| /** |
| * align up |
| */ |
| static inline uint32_t GrUIAlignUp(uint32_t x, uint32_t alignment) { |
| return GrUIDivRoundUp(x, alignment) * alignment; |
| } |
| static inline size_t GrSizeAlignUp(size_t x, size_t alignment) { |
| return GrSizeDivRoundUp(x, alignment) * alignment; |
| } |
| |
| // compile time, evaluates A multiple times |
| #define GR_CT_ALIGN_UP(X, A) (GR_CT_DIV_ROUND_UP((X),(A)) * (A)) |
| |
| /** |
| * amount of pad needed to align up |
| */ |
| static inline uint32_t GrUIAlignUpPad(uint32_t x, uint32_t alignment) { |
| return (alignment - x % alignment) % alignment; |
| } |
| static inline size_t GrSizeAlignUpPad(size_t x, size_t alignment) { |
| return (alignment - x % alignment) % alignment; |
| } |
| |
| /** |
| * align down |
| */ |
| static inline uint32_t GrUIAlignDown(uint32_t x, uint32_t alignment) { |
| return (x / alignment) * alignment; |
| } |
| static inline size_t GrSizeAlignDown(size_t x, uint32_t alignment) { |
| return (x / alignment) * alignment; |
| } |
| |
| /** |
| * Count elements in an array |
| */ |
| #define GR_ARRAY_COUNT(array) SK_ARRAY_COUNT(array) |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| /** |
| * Return true if n is a power of 2 |
| */ |
| static inline bool GrIsPow2(unsigned n) { |
| return n && 0 == (n & (n - 1)); |
| } |
| |
| /** |
| * Return the next power of 2 >= n. |
| */ |
| static inline uint32_t GrNextPow2(uint32_t n) { |
| return n ? (1 << (32 - SkCLZ(n - 1))) : 1; |
| } |
| |
| static inline int GrNextPow2(int n) { |
| SkASSERT(n >= 0); // this impl only works for non-neg. |
| return n ? (1 << (32 - SkCLZ(n - 1))) : 1; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| /** |
| * 16.16 fixed point type |
| */ |
| typedef int32_t GrFixed; |
| |
| #ifdef SK_DEBUG |
| |
| static inline int16_t GrToS16(intptr_t x) { |
| SkASSERT((int16_t)x == x); |
| return (int16_t)x; |
| } |
| |
| #else |
| |
| #define GrToS16(x) x |
| |
| #endif |
| |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| /** |
| * Possible 3D APIs that may be used by Ganesh. |
| */ |
| enum GrBackend { |
| kOpenGL_GrBackend, |
| }; |
| |
| /** |
| * Backend-specific 3D context handle |
| * GrGLInterface* for OpenGL. If NULL will use the default GL interface. |
| */ |
| typedef intptr_t GrBackendContext; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| /** |
| * Geometric primitives used for drawing. |
| */ |
| enum GrPrimitiveType { |
| kTriangles_GrPrimitiveType, |
| kTriangleStrip_GrPrimitiveType, |
| kTriangleFan_GrPrimitiveType, |
| kPoints_GrPrimitiveType, |
| kLines_GrPrimitiveType, // 1 pix wide only |
| kLineStrip_GrPrimitiveType // 1 pix wide only |
| }; |
| |
| static inline bool GrIsPrimTypeLines(GrPrimitiveType type) { |
| return kLines_GrPrimitiveType == type || kLineStrip_GrPrimitiveType == type; |
| } |
| |
| static inline bool GrIsPrimTypeTris(GrPrimitiveType type) { |
| return kTriangles_GrPrimitiveType == type || |
| kTriangleStrip_GrPrimitiveType == type || |
| kTriangleFan_GrPrimitiveType == type; |
| } |
| |
| /** |
| * Coeffecients for alpha-blending. |
| */ |
| enum GrBlendCoeff { |
| kInvalid_GrBlendCoeff = -1, |
| |
| kZero_GrBlendCoeff, //<! 0 |
| kOne_GrBlendCoeff, //<! 1 |
| kSC_GrBlendCoeff, //<! src color |
| kISC_GrBlendCoeff, //<! one minus src color |
| kDC_GrBlendCoeff, //<! dst color |
| kIDC_GrBlendCoeff, //<! one minus dst color |
| kSA_GrBlendCoeff, //<! src alpha |
| kISA_GrBlendCoeff, //<! one minus src alpha |
| kDA_GrBlendCoeff, //<! dst alpha |
| kIDA_GrBlendCoeff, //<! one minus dst alpha |
| kConstC_GrBlendCoeff, //<! constant color |
| kIConstC_GrBlendCoeff, //<! one minus constant color |
| kConstA_GrBlendCoeff, //<! constant color alpha |
| kIConstA_GrBlendCoeff, //<! one minus constant color alpha |
| |
| kPublicGrBlendCoeffCount |
| }; |
| |
| /** |
| * Formats for masks, used by the font cache. |
| * Important that these are 0-based. |
| */ |
| enum GrMaskFormat { |
| kA8_GrMaskFormat, //!< 1-byte per pixel |
| kA565_GrMaskFormat, //!< 2-bytes per pixel |
| kA888_GrMaskFormat, //!< 4-bytes per pixel |
| |
| kLast_GrMaskFormat = kA888_GrMaskFormat |
| }; |
| static const int kMaskFormatCount = kLast_GrMaskFormat + 1; |
| |
| /** |
| * Return the number of bytes-per-pixel for the specified mask format. |
| */ |
| static inline int GrMaskFormatBytesPerPixel(GrMaskFormat format) { |
| SkASSERT((unsigned)format <= 2); |
| // kA8 (0) -> 1 |
| // kA565 (1) -> 2 |
| // kA888 (2) -> 4 |
| return 1 << (int)format; |
| } |
| |
| /** |
| * Pixel configurations. |
| */ |
| enum GrPixelConfig { |
| kUnknown_GrPixelConfig, |
| kAlpha_8_GrPixelConfig, |
| kIndex_8_GrPixelConfig, |
| kRGB_565_GrPixelConfig, |
| /** |
| * Premultiplied |
| */ |
| kRGBA_4444_GrPixelConfig, |
| /** |
| * Premultiplied. Byte order is r,g,b,a. |
| */ |
| kRGBA_8888_GrPixelConfig, |
| /** |
| * Premultiplied. Byte order is b,g,r,a. |
| */ |
| kBGRA_8888_GrPixelConfig, |
| |
| kLast_GrPixelConfig = kBGRA_8888_GrPixelConfig |
| }; |
| static const int kGrPixelConfigCnt = kLast_GrPixelConfig + 1; |
| |
| // Aliases for pixel configs that match skia's byte order. |
| #ifndef SK_CPU_LENDIAN |
| #error "Skia gpu currently assumes little endian" |
| #endif |
| #if SK_PMCOLOR_BYTE_ORDER(B,G,R,A) |
| static const GrPixelConfig kSkia8888_GrPixelConfig = kBGRA_8888_GrPixelConfig; |
| #elif SK_PMCOLOR_BYTE_ORDER(R,G,B,A) |
| static const GrPixelConfig kSkia8888_GrPixelConfig = kRGBA_8888_GrPixelConfig; |
| #else |
| #error "SK_*32_SHIFT values must correspond to GL_BGRA or GL_RGBA format." |
| #endif |
| |
| // Returns true if the pixel config is 32 bits per pixel |
| static inline bool GrPixelConfigIs8888(GrPixelConfig config) { |
| switch (config) { |
| case kRGBA_8888_GrPixelConfig: |
| case kBGRA_8888_GrPixelConfig: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| // Takes a config and returns the equivalent config with the R and B order |
| // swapped if such a config exists. Otherwise, kUnknown_GrPixelConfig |
| static inline GrPixelConfig GrPixelConfigSwapRAndB(GrPixelConfig config) { |
| switch (config) { |
| case kBGRA_8888_GrPixelConfig: |
| return kRGBA_8888_GrPixelConfig; |
| case kRGBA_8888_GrPixelConfig: |
| return kBGRA_8888_GrPixelConfig; |
| default: |
| return kUnknown_GrPixelConfig; |
| } |
| } |
| |
| static inline size_t GrBytesPerPixel(GrPixelConfig config) { |
| switch (config) { |
| case kAlpha_8_GrPixelConfig: |
| case kIndex_8_GrPixelConfig: |
| return 1; |
| case kRGB_565_GrPixelConfig: |
| case kRGBA_4444_GrPixelConfig: |
| return 2; |
| case kRGBA_8888_GrPixelConfig: |
| case kBGRA_8888_GrPixelConfig: |
| return 4; |
| default: |
| return 0; |
| } |
| } |
| |
| static inline bool GrPixelConfigIsOpaque(GrPixelConfig config) { |
| switch (config) { |
| case kRGB_565_GrPixelConfig: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| static inline bool GrPixelConfigIsAlphaOnly(GrPixelConfig config) { |
| switch (config) { |
| case kAlpha_8_GrPixelConfig: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| /** |
| * Optional bitfield flags that can be passed to createTexture. |
| */ |
| enum GrTextureFlags { |
| kNone_GrTextureFlags = 0x0, |
| /** |
| * Creates a texture that can be rendered to as a GrRenderTarget. Use |
| * GrTexture::asRenderTarget() to access. |
| */ |
| kRenderTarget_GrTextureFlagBit = 0x1, |
| /** |
| * By default all render targets have an associated stencil buffer that |
| * may be required for path filling. This flag overrides stencil buffer |
| * creation. |
| * MAKE THIS PRIVATE? |
| */ |
| kNoStencil_GrTextureFlagBit = 0x2, |
| /** |
| * Hint that the CPU may modify this texture after creation. |
| */ |
| kDynamicUpdate_GrTextureFlagBit = 0x4, |
| /** |
| * Indicates that all allocations (color buffer, FBO completeness, etc) |
| * should be verified. |
| */ |
| kCheckAllocation_GrTextureFlagBit = 0x8, |
| |
| kDummy_GrTextureFlagBit, |
| kLastPublic_GrTextureFlagBit = kDummy_GrTextureFlagBit-1, |
| }; |
| |
| GR_MAKE_BITFIELD_OPS(GrTextureFlags) |
| |
| enum { |
| /** |
| * For Index8 pixel config, the colortable must be 256 entries |
| */ |
| kGrColorTableSize = 256 * 4 //sizeof(GrColor) |
| }; |
| |
| /** |
| * Some textures will be stored such that the upper and left edges of the content meet at the |
| * the origin (in texture coord space) and for other textures the lower and left edges meet at |
| * the origin. kDefault_GrSurfaceOrigin sets textures to TopLeft, and render targets |
| * to BottomLeft. |
| */ |
| |
| enum GrSurfaceOrigin { |
| kDefault_GrSurfaceOrigin, // DEPRECATED; to be removed |
| kTopLeft_GrSurfaceOrigin, |
| kBottomLeft_GrSurfaceOrigin, |
| }; |
| |
| /** |
| * Describes a texture to be created. |
| */ |
| struct GrTextureDesc { |
| GrTextureDesc() |
| : fFlags(kNone_GrTextureFlags) |
| , fOrigin(kDefault_GrSurfaceOrigin) |
| , fWidth(0) |
| , fHeight(0) |
| , fConfig(kUnknown_GrPixelConfig) |
| , fSampleCnt(0) { |
| } |
| |
| GrTextureFlags fFlags; //!< bitfield of TextureFlags |
| GrSurfaceOrigin fOrigin; //!< origin of the texture |
| int fWidth; //!< Width of the texture |
| int fHeight; //!< Height of the texture |
| |
| /** |
| * Format of source data of the texture. Not guaranteed to be the same as |
| * internal format used by 3D API. |
| */ |
| GrPixelConfig fConfig; |
| |
| /** |
| * The number of samples per pixel or 0 to disable full scene AA. This only |
| * applies if the kRenderTarget_GrTextureFlagBit is set. The actual number |
| * of samples may not exactly match the request. The request will be rounded |
| * up to the next supported sample count, or down if it is larger than the |
| * max supported count. |
| */ |
| int fSampleCnt; |
| }; |
| |
| /** |
| * GrCacheID is used create and find cached GrResources (e.g. GrTextures). The ID has two parts: |
| * the domain and the key. Domains simply allow multiple clients to use 0-based indices as their |
| * cache key without colliding. The key uniquely identifies a GrResource within the domain. |
| * Users of the cache must obtain a domain via GenerateDomain(). |
| */ |
| struct GrCacheID { |
| public: |
| typedef uint8_t Domain; |
| |
| struct Key { |
| union { |
| uint8_t fData8[16]; |
| uint32_t fData32[4]; |
| uint64_t fData64[2]; |
| }; |
| }; |
| |
| /** |
| * A default cache ID is invalid; a set method must be called before the object is used. |
| */ |
| GrCacheID() { fDomain = kInvalid_Domain; } |
| |
| /** |
| * Initialize the cache ID to a domain and key. |
| */ |
| GrCacheID(Domain domain, const Key& key) { |
| SkASSERT(kInvalid_Domain != domain); |
| this->reset(domain, key); |
| } |
| |
| void reset(Domain domain, const Key& key) { |
| fDomain = domain; |
| memcpy(&fKey, &key, sizeof(Key)); |
| } |
| |
| /** Has this been initialized to a valid domain */ |
| bool isValid() const { return kInvalid_Domain != fDomain; } |
| |
| const Key& getKey() const { SkASSERT(this->isValid()); return fKey; } |
| Domain getDomain() const { SkASSERT(this->isValid()); return fDomain; } |
| |
| /** Creates a new unique ID domain. */ |
| static Domain GenerateDomain(); |
| |
| private: |
| Key fKey; |
| Domain fDomain; |
| |
| static const Domain kInvalid_Domain = 0; |
| }; |
| |
| /** |
| * Clips are composed from these objects. |
| */ |
| enum GrClipType { |
| kRect_ClipType, |
| kPath_ClipType |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| // opaque type for 3D API object handles |
| typedef intptr_t GrBackendObject; |
| |
| /** |
| * Gr can wrap an existing texture created by the client with a GrTexture |
| * object. The client is responsible for ensuring that the texture lives at |
| * least as long as the GrTexture object wrapping it. We require the client to |
| * explicitly provide information about the texture, such as width, height, |
| * and pixel config, rather than querying the 3D APIfor these values. We expect |
| * these to be immutable even if the 3D API doesn't require this (OpenGL). |
| * |
| * Textures that are also render targets are supported as well. Gr will manage |
| * any ancillary 3D API (stencil buffer, FBO id, etc) objects necessary for |
| * Gr to draw into the render target. To access the render target object |
| * call GrTexture::asRenderTarget(). |
| * |
| * If in addition to the render target flag, the caller also specifies a sample |
| * count Gr will create an MSAA buffer that resolves into the texture. Gr auto- |
| * resolves when it reads from the texture. The client can explictly resolve |
| * using the GrRenderTarget interface. |
| * |
| * Note: These flags currently form a subset of GrTexture's flags. |
| */ |
| |
| enum GrBackendTextureFlags { |
| /** |
| * No flags enabled |
| */ |
| kNone_GrBackendTextureFlag = kNone_GrTextureFlags, |
| /** |
| * Indicates that the texture is also a render target, and thus should have |
| * a GrRenderTarget object. |
| * |
| * D3D (future): client must have created the texture with flags that allow |
| * it to be used as a render target. |
| */ |
| kRenderTarget_GrBackendTextureFlag = kRenderTarget_GrTextureFlagBit, |
| }; |
| GR_MAKE_BITFIELD_OPS(GrBackendTextureFlags) |
| |
| struct GrBackendTextureDesc { |
| GrBackendTextureDesc() { memset(this, 0, sizeof(*this)); } |
| GrBackendTextureFlags fFlags; |
| GrSurfaceOrigin fOrigin; |
| int fWidth; //<! width in pixels |
| int fHeight; //<! height in pixels |
| GrPixelConfig fConfig; //<! color format |
| /** |
| * If the render target flag is set and sample count is greater than 0 |
| * then Gr will create an MSAA buffer that resolves to the texture. |
| */ |
| int fSampleCnt; |
| /** |
| * Handle to the 3D API object. |
| * OpenGL: Texture ID. |
| */ |
| GrBackendObject fTextureHandle; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| /** |
| * Gr can wrap an existing render target created by the client in the 3D API |
| * with a GrRenderTarget object. The client is responsible for ensuring that the |
| * underlying 3D API object lives at least as long as the GrRenderTarget object |
| * wrapping it. We require the client to explicitly provide information about |
| * the target, such as width, height, and pixel config rather than querying the |
| * 3D API for these values. We expect these properties to be immutable even if |
| * the 3D API doesn't require this (OpenGL). |
| */ |
| |
| struct GrBackendRenderTargetDesc { |
| GrBackendRenderTargetDesc() { memset(this, 0, sizeof(*this)); } |
| int fWidth; //<! width in pixels |
| int fHeight; //<! height in pixels |
| GrPixelConfig fConfig; //<! color format |
| GrSurfaceOrigin fOrigin; //<! pixel origin |
| /** |
| * The number of samples per pixel. Gr uses this to influence decisions |
| * about applying other forms of anti-aliasing. |
| */ |
| int fSampleCnt; |
| /** |
| * Number of bits of stencil per-pixel. |
| */ |
| int fStencilBits; |
| /** |
| * Handle to the 3D API object. |
| * OpenGL: FBO ID |
| */ |
| GrBackendObject fRenderTargetHandle; |
| }; |
| |
| /** |
| * The GrContext's cache of backend context state can be partially invalidated. |
| * These enums are specific to the GL backend and we'd add a new set for an alternative backend. |
| */ |
| enum GrGLBackendState { |
| kRenderTarget_GrGLBackendState = 1 << 0, |
| kTextureBinding_GrGLBackendState = 1 << 1, |
| // View state stands for scissor and viewport |
| kView_GrGLBackendState = 1 << 2, |
| kBlend_GrGLBackendState = 1 << 3, |
| kAA_GrGLBackendState = 1 << 4, |
| kVertex_GrGLBackendState = 1 << 5, |
| kStencil_GrGLBackendState = 1 << 6, |
| kPixelStore_GrGLBackendState = 1 << 7, |
| kProgram_GrGLBackendState = 1 << 8, |
| kFixedFunction_GrGLBackendState = 1 << 9, |
| kMisc_GrGLBackendState = 1 << 10, |
| kPathRendering_GrGLBackendState = 1 << 11, |
| kALL_GrGLBackendState = 0xffff |
| }; |
| |
| /** |
| * This value translates to reseting all the context state for any backend. |
| */ |
| static const uint32_t kAll_GrBackendState = 0xffffffff; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #endif |