| // Copyright 2014 The PDFium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
| |
| #ifndef CORE_FXGE_DIB_FX_DIB_H_ |
| #define CORE_FXGE_DIB_FX_DIB_H_ |
| |
| #include <stdint.h> |
| |
| #include <tuple> |
| #include <utility> |
| |
| // Encoding: |
| // - Bits-per-pixel: value & 0xFF |
| // - Is mask: value & 0x100 |
| // - Has alpha: value & 0x200 |
| enum class FXDIB_Format : uint16_t { |
| kInvalid = 0, |
| k1bppRgb = 0x001, |
| k8bppRgb = 0x008, |
| kRgb = 0x018, |
| kRgb32 = 0x020, |
| k1bppMask = 0x101, |
| k8bppMask = 0x108, |
| kArgb = 0x220, |
| }; |
| |
| using FX_ARGB = uint32_t; |
| using FX_CMYK = uint32_t; |
| |
| // FX_COLORREF, like win32 COLORREF, is BGR. |
| using FX_COLORREF = uint32_t; |
| |
| struct FXDIB_ResampleOptions { |
| FXDIB_ResampleOptions(); |
| |
| bool HasAnyOptions() const; |
| |
| bool bInterpolateBilinear = false; |
| bool bHalftone = false; |
| bool bNoSmoothing = false; |
| bool bLossy = false; |
| }; |
| |
| // See PDF 1.7 spec, table 7.2 and 7.3. The enum values need to be in the same |
| // order as listed in the spec. |
| enum class BlendMode { |
| kNormal = 0, |
| kMultiply, |
| kScreen, |
| kOverlay, |
| kDarken, |
| kLighten, |
| kColorDodge, |
| kColorBurn, |
| kHardLight, |
| kSoftLight, |
| kDifference, |
| kExclusion, |
| kHue, |
| kSaturation, |
| kColor, |
| kLuminosity, |
| kLast = kLuminosity, |
| }; |
| |
| constexpr uint32_t FXSYS_BGR(uint8_t b, uint8_t g, uint8_t r) { |
| return (b << 16) | (g << 8) | r; |
| } |
| |
| constexpr uint8_t FXSYS_GetRValue(uint32_t bgr) { |
| return bgr & 0xff; |
| } |
| |
| constexpr uint8_t FXSYS_GetGValue(uint32_t bgr) { |
| return (bgr >> 8) & 0xff; |
| } |
| |
| constexpr uint8_t FXSYS_GetBValue(uint32_t bgr) { |
| return (bgr >> 16) & 0xff; |
| } |
| |
| constexpr unsigned int FXSYS_GetUnsignedAlpha(float alpha) { |
| return static_cast<unsigned int>(alpha * 255.f + 0.5f); |
| } |
| |
| // Bits per pixel, not bytes. |
| inline int GetBppFromFormat(FXDIB_Format format) { |
| return static_cast<uint16_t>(format) & 0xff; |
| } |
| |
| // AKA bytes per pixel, assuming 8-bits per component. |
| inline int GetCompsFromFormat(FXDIB_Format format) { |
| return (static_cast<uint16_t>(format) & 0xff) / 8; |
| } |
| |
| inline bool GetIsMaskFromFormat(FXDIB_Format format) { |
| return !!(static_cast<uint16_t>(format) & 0x100); |
| } |
| |
| FXDIB_Format MakeRGBFormat(int bpp); |
| |
| constexpr FX_CMYK CmykEncode(uint32_t c, uint32_t m, uint32_t y, uint32_t k) { |
| return (c << 24) | (m << 16) | (y << 8) | k; |
| } |
| |
| // Returns (a, r, g, b) |
| std::tuple<int, int, int, int> ArgbDecode(FX_ARGB argb); |
| |
| // Returns (a, FX_COLORREF) |
| std::pair<int, FX_COLORREF> ArgbToAlphaAndColorRef(FX_ARGB argb); |
| |
| // Returns FX_COLORREF. |
| FX_COLORREF ArgbToColorRef(FX_ARGB argb); |
| |
| constexpr FX_ARGB ArgbEncode(uint32_t a, uint32_t r, uint32_t g, uint32_t b) { |
| return (a << 24) | (r << 16) | (g << 8) | b; |
| } |
| |
| FX_ARGB AlphaAndColorRefToArgb(int a, FX_COLORREF colorref); |
| |
| #define FXARGB_A(argb) ((uint8_t)((argb) >> 24)) |
| #define FXARGB_R(argb) ((uint8_t)((argb) >> 16)) |
| #define FXARGB_G(argb) ((uint8_t)((argb) >> 8)) |
| #define FXARGB_B(argb) ((uint8_t)(argb)) |
| #define FXARGB_MUL_ALPHA(argb, alpha) \ |
| (((((argb) >> 24) * (alpha) / 255) << 24) | ((argb)&0xffffff)) |
| |
| #define FXRGB2GRAY(r, g, b) (((b)*11 + (g)*59 + (r)*30) / 100) |
| #define FXDIB_ALPHA_MERGE(backdrop, source, source_alpha) \ |
| (((backdrop) * (255 - (source_alpha)) + (source) * (source_alpha)) / 255) |
| #define FXARGB_GETDIB(p) \ |
| ((((uint8_t*)(p))[0]) | (((uint8_t*)(p))[1] << 8) | \ |
| (((uint8_t*)(p))[2] << 16) | (((uint8_t*)(p))[3] << 24)) |
| #define FXARGB_SETDIB(p, argb) \ |
| ((uint8_t*)(p))[0] = (uint8_t)(argb), \ |
| ((uint8_t*)(p))[1] = (uint8_t)((argb) >> 8), \ |
| ((uint8_t*)(p))[2] = (uint8_t)((argb) >> 16), \ |
| ((uint8_t*)(p))[3] = (uint8_t)((argb) >> 24) |
| #define FXARGB_SETRGBORDERDIB(p, argb) \ |
| ((uint8_t*)(p))[3] = (uint8_t)(argb >> 24), \ |
| ((uint8_t*)(p))[0] = (uint8_t)((argb) >> 16), \ |
| ((uint8_t*)(p))[1] = (uint8_t)((argb) >> 8), \ |
| ((uint8_t*)(p))[2] = (uint8_t)(argb) |
| #define FXCMYK_TODIB(cmyk) \ |
| ((uint8_t)((cmyk) >> 24) | ((uint8_t)((cmyk) >> 16)) << 8 | \ |
| ((uint8_t)((cmyk) >> 8)) << 16 | ((uint8_t)(cmyk) << 24)) |
| #define FXARGB_TOBGRORDERDIB(argb) \ |
| ((uint8_t)(argb >> 16) | ((uint8_t)(argb >> 8)) << 8 | \ |
| ((uint8_t)(argb)) << 16 | ((uint8_t)(argb >> 24) << 24)) |
| |
| inline void ReverseCopy3Bytes(uint8_t* dest, const uint8_t* src) { |
| dest[2] = src[0]; |
| dest[1] = src[1]; |
| dest[0] = src[2]; |
| } |
| |
| #endif // CORE_FXGE_DIB_FX_DIB_H_ |