// 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 } }