diff options
Diffstat (limited to 'core/fpdfapi/render/cpdf_dibtransferfunc.cpp')
| -rw-r--r-- | core/fpdfapi/render/cpdf_dibtransferfunc.cpp | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/core/fpdfapi/render/cpdf_dibtransferfunc.cpp b/core/fpdfapi/render/cpdf_dibtransferfunc.cpp new file mode 100644 index 0000000000..41575fc8c2 --- /dev/null +++ b/core/fpdfapi/render/cpdf_dibtransferfunc.cpp @@ -0,0 +1,178 @@ +// Copyright 2016 PDFium Authors. All rights reserved. +// 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 + +#include "core/fpdfapi/render/cpdf_dibtransferfunc.h" + +#include <vector> + +#include "core/fpdfapi/parser/cpdf_dictionary.h" +#include "core/fpdfapi/render/cpdf_transferfunc.h" + +CPDF_DIBTransferFunc::CPDF_DIBTransferFunc( + const CPDF_TransferFunc* pTransferFunc) { + m_RampR = pTransferFunc->m_Samples; + m_RampG = &pTransferFunc->m_Samples[256]; + m_RampB = &pTransferFunc->m_Samples[512]; +} + +CPDF_DIBTransferFunc::~CPDF_DIBTransferFunc() {} + +FXDIB_Format CPDF_DIBTransferFunc::GetDestFormat() { + if (m_pSrc->IsAlphaMask()) + return FXDIB_8bppMask; + +#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ + return (m_pSrc->HasAlpha()) ? FXDIB_Argb : FXDIB_Rgb32; +#else + return (m_pSrc->HasAlpha()) ? FXDIB_Argb : FXDIB_Rgb; +#endif +} + +FX_ARGB* CPDF_DIBTransferFunc::GetDestPalette() { + return nullptr; +} + +void CPDF_DIBTransferFunc::TranslateScanline( + const uint8_t* src_buf, + std::vector<uint8_t>* dest_buf) const { + bool bSkip = false; + switch (m_pSrc->GetFormat()) { + case FXDIB_1bppRgb: { + int r0 = m_RampR[0]; + int g0 = m_RampG[0]; + int b0 = m_RampB[0]; + int r1 = m_RampR[255]; + int g1 = m_RampG[255]; + int b1 = m_RampB[255]; + int index = 0; + for (int i = 0; i < m_Width; i++) { + if (src_buf[i / 8] & (1 << (7 - i % 8))) { + (*dest_buf)[index++] = b1; + (*dest_buf)[index++] = g1; + (*dest_buf)[index++] = r1; + } else { + (*dest_buf)[index++] = b0; + (*dest_buf)[index++] = g0; + (*dest_buf)[index++] = r0; + } +#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ + index++; +#endif + } + break; + } + case FXDIB_1bppMask: { + int m0 = m_RampR[0]; + int m1 = m_RampR[255]; + int index = 0; + for (int i = 0; i < m_Width; i++) { + if (src_buf[i / 8] & (1 << (7 - i % 8))) + (*dest_buf)[index++] = m1; + else + (*dest_buf)[index++] = m0; + } + break; + } + case FXDIB_8bppRgb: { + FX_ARGB* pPal = m_pSrc->GetPalette(); + int index = 0; + for (int i = 0; i < m_Width; i++) { + if (pPal) { + FX_ARGB src_argb = pPal[*src_buf]; + (*dest_buf)[index++] = m_RampB[FXARGB_R(src_argb)]; + (*dest_buf)[index++] = m_RampG[FXARGB_G(src_argb)]; + (*dest_buf)[index++] = m_RampR[FXARGB_B(src_argb)]; + } else { + uint32_t src_byte = *src_buf; + (*dest_buf)[index++] = m_RampB[src_byte]; + (*dest_buf)[index++] = m_RampG[src_byte]; + (*dest_buf)[index++] = m_RampR[src_byte]; + } + src_buf++; +#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ + index++; +#endif + } + break; + } + case FXDIB_8bppMask: { + int index = 0; + for (int i = 0; i < m_Width; i++) + (*dest_buf)[index++] = m_RampR[*(src_buf++)]; + break; + } + case FXDIB_Rgb: { + int index = 0; + for (int i = 0; i < m_Width; i++) { + (*dest_buf)[index++] = m_RampB[*(src_buf++)]; + (*dest_buf)[index++] = m_RampG[*(src_buf++)]; + (*dest_buf)[index++] = m_RampR[*(src_buf++)]; +#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ + index++; +#endif + } + break; + } + case FXDIB_Rgb32: + bSkip = true; + case FXDIB_Argb: { + int index = 0; + for (int i = 0; i < m_Width; i++) { + (*dest_buf)[index++] = m_RampB[*(src_buf++)]; + (*dest_buf)[index++] = m_RampG[*(src_buf++)]; + (*dest_buf)[index++] = m_RampR[*(src_buf++)]; + if (!bSkip) { + (*dest_buf)[index++] = *src_buf; +#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ + } else { + index++; +#endif + } + src_buf++; + } + break; + } + default: + break; + } +} + +void CPDF_DIBTransferFunc::TranslateDownSamples(uint8_t* dest_buf, + const uint8_t* src_buf, + int pixels, + int Bpp) const { + if (Bpp == 8) { + for (int i = 0; i < pixels; i++) + *dest_buf++ = m_RampR[*(src_buf++)]; + } else if (Bpp == 24) { + for (int i = 0; i < pixels; i++) { + *dest_buf++ = m_RampB[*(src_buf++)]; + *dest_buf++ = m_RampG[*(src_buf++)]; + *dest_buf++ = m_RampR[*(src_buf++)]; + } + } else { +#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ + if (!m_pSrc->HasAlpha()) { + for (int i = 0; i < pixels; i++) { + *dest_buf++ = m_RampB[*(src_buf++)]; + *dest_buf++ = m_RampG[*(src_buf++)]; + *dest_buf++ = m_RampR[*(src_buf++)]; + dest_buf++; + src_buf++; + } + } else { +#endif + for (int i = 0; i < pixels; i++) { + *dest_buf++ = m_RampB[*(src_buf++)]; + *dest_buf++ = m_RampG[*(src_buf++)]; + *dest_buf++ = m_RampR[*(src_buf++)]; + *dest_buf++ = *(src_buf++); + } +#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ + } +#endif + } +} |