diff options
Diffstat (limited to 'core/fxge/dib/cfx_dibitmap.cpp')
| -rw-r--r-- | core/fxge/dib/cfx_dibitmap.cpp | 1469 |
1 files changed, 1469 insertions, 0 deletions
diff --git a/core/fxge/dib/cfx_dibitmap.cpp b/core/fxge/dib/cfx_dibitmap.cpp new file mode 100644 index 0000000000..0adc088b53 --- /dev/null +++ b/core/fxge/dib/cfx_dibitmap.cpp @@ -0,0 +1,1469 @@ +// Copyright 2017 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/fxge/dib/cfx_dibitmap.h" + +#include <limits> +#include <memory> +#include <utility> + +#include "core/fxcodec/fx_codec.h" +#include "core/fxge/cfx_gemodule.h" +#include "core/fxge/dib/dib_int.h" +#include "core/fxge/ge/cfx_cliprgn.h" +#include "third_party/base/ptr_util.h" + +#define MAX_OOM_LIMIT 12000000 + +CFX_DIBitmap::CFX_DIBitmap() { + m_bExtBuf = false; + m_pBuffer = nullptr; + m_pPalette = nullptr; +#ifdef _SKIA_SUPPORT_PATHS_ + m_nFormat = Format::kCleared; +#endif +} + +bool CFX_DIBitmap::Create(int width, + int height, + FXDIB_Format format, + uint8_t* pBuffer, + int pitch) { + m_pBuffer = nullptr; + m_bpp = static_cast<uint8_t>(format); + m_AlphaFlag = static_cast<uint8_t>(format >> 8); + m_Width = m_Height = m_Pitch = 0; + if (width <= 0 || height <= 0 || pitch < 0) + return false; + + if ((INT_MAX - 31) / width < (format & 0xff)) + return false; + + if (!pitch) + pitch = (width * (format & 0xff) + 31) / 32 * 4; + + if ((1 << 30) / pitch < height) + return false; + + if (pBuffer) { + m_pBuffer = pBuffer; + m_bExtBuf = true; + } else { + int size = pitch * height + 4; + int oomlimit = MAX_OOM_LIMIT; + if (oomlimit >= 0 && size >= oomlimit) { + m_pBuffer = FX_TryAlloc(uint8_t, size); + if (!m_pBuffer) + return false; + } else { + m_pBuffer = FX_Alloc(uint8_t, size); + } + } + m_Width = width; + m_Height = height; + m_Pitch = pitch; + if (!HasAlpha() || format == FXDIB_Argb) + return true; + + if (BuildAlphaMask()) + return true; + + if (m_bExtBuf) + return true; + + FX_Free(m_pBuffer); + m_pBuffer = nullptr; + m_Width = m_Height = m_Pitch = 0; + return false; +} + +bool CFX_DIBitmap::Copy(const CFX_RetainPtr<CFX_DIBSource>& pSrc) { + if (m_pBuffer) + return false; + + if (!Create(pSrc->GetWidth(), pSrc->GetHeight(), pSrc->GetFormat())) + return false; + + SetPalette(pSrc->GetPalette()); + SetAlphaMask(pSrc->m_pAlphaMask); + for (int row = 0; row < pSrc->GetHeight(); row++) + FXSYS_memcpy(m_pBuffer + row * m_Pitch, pSrc->GetScanline(row), m_Pitch); + return true; +} + +CFX_DIBitmap::~CFX_DIBitmap() { + if (!m_bExtBuf) + FX_Free(m_pBuffer); +} + +uint8_t* CFX_DIBitmap::GetBuffer() const { + return m_pBuffer; +} + +const uint8_t* CFX_DIBitmap::GetScanline(int line) const { + return m_pBuffer ? m_pBuffer + line * m_Pitch : nullptr; +} + +void CFX_DIBitmap::TakeOver(CFX_RetainPtr<CFX_DIBitmap>&& pSrcBitmap) { + if (!m_bExtBuf) + FX_Free(m_pBuffer); + + m_pBuffer = pSrcBitmap->m_pBuffer; + m_pPalette = std::move(pSrcBitmap->m_pPalette); + m_pAlphaMask = pSrcBitmap->m_pAlphaMask; + pSrcBitmap->m_pBuffer = nullptr; + pSrcBitmap->m_pAlphaMask = nullptr; + m_bpp = pSrcBitmap->m_bpp; + m_bExtBuf = pSrcBitmap->m_bExtBuf; + m_AlphaFlag = pSrcBitmap->m_AlphaFlag; + m_Width = pSrcBitmap->m_Width; + m_Height = pSrcBitmap->m_Height; + m_Pitch = pSrcBitmap->m_Pitch; +} + +void CFX_DIBitmap::Clear(uint32_t color) { + if (!m_pBuffer) { + return; + } + switch (GetFormat()) { + case FXDIB_1bppMask: + FXSYS_memset(m_pBuffer, (color & 0xff000000) ? 0xff : 0, + m_Pitch * m_Height); + break; + case FXDIB_1bppRgb: { + int index = FindPalette(color); + FXSYS_memset(m_pBuffer, index ? 0xff : 0, m_Pitch * m_Height); + break; + } + case FXDIB_8bppMask: + FXSYS_memset(m_pBuffer, color >> 24, m_Pitch * m_Height); + break; + case FXDIB_8bppRgb: { + int index = FindPalette(color); + FXSYS_memset(m_pBuffer, index, m_Pitch * m_Height); + break; + } + case FXDIB_Rgb: + case FXDIB_Rgba: { + int a, r, g, b; + ArgbDecode(color, a, r, g, b); + if (r == g && g == b) { + FXSYS_memset(m_pBuffer, r, m_Pitch * m_Height); + } else { + int byte_pos = 0; + for (int col = 0; col < m_Width; col++) { + m_pBuffer[byte_pos++] = b; + m_pBuffer[byte_pos++] = g; + m_pBuffer[byte_pos++] = r; + } + for (int row = 1; row < m_Height; row++) { + FXSYS_memcpy(m_pBuffer + row * m_Pitch, m_pBuffer, m_Pitch); + } + } + break; + } + case FXDIB_Rgb32: + case FXDIB_Argb: { + color = IsCmykImage() ? FXCMYK_TODIB(color) : FXARGB_TODIB(color); +#ifdef _SKIA_SUPPORT_ + if (FXDIB_Rgb32 == GetFormat() && !IsCmykImage()) { + color |= 0xFF000000; + } +#endif + for (int i = 0; i < m_Width; i++) { + ((uint32_t*)m_pBuffer)[i] = color; + } + for (int row = 1; row < m_Height; row++) { + FXSYS_memcpy(m_pBuffer + row * m_Pitch, m_pBuffer, m_Pitch); + } + break; + } + default: + break; + } +} + +bool CFX_DIBitmap::TransferBitmap( + int dest_left, + int dest_top, + int width, + int height, + const CFX_RetainPtr<CFX_DIBSource>& pSrcBitmap, + int src_left, + int src_top) { + if (!m_pBuffer) + return false; + + GetOverlapRect(dest_left, dest_top, width, height, pSrcBitmap->GetWidth(), + pSrcBitmap->GetHeight(), src_left, src_top, nullptr); + if (width == 0 || height == 0) + return true; + + FXDIB_Format dest_format = GetFormat(); + FXDIB_Format src_format = pSrcBitmap->GetFormat(); + if (dest_format == src_format) { + if (GetBPP() == 1) { + for (int row = 0; row < height; row++) { + uint8_t* dest_scan = m_pBuffer + (dest_top + row) * m_Pitch; + const uint8_t* src_scan = pSrcBitmap->GetScanline(src_top + row); + for (int col = 0; col < width; col++) { + if (src_scan[(src_left + col) / 8] & + (1 << (7 - (src_left + col) % 8))) { + dest_scan[(dest_left + col) / 8] |= 1 + << (7 - (dest_left + col) % 8); + } else { + dest_scan[(dest_left + col) / 8] &= + ~(1 << (7 - (dest_left + col) % 8)); + } + } + } + } else { + int Bpp = GetBPP() / 8; + for (int row = 0; row < height; row++) { + uint8_t* dest_scan = + m_pBuffer + (dest_top + row) * m_Pitch + dest_left * Bpp; + const uint8_t* src_scan = + pSrcBitmap->GetScanline(src_top + row) + src_left * Bpp; + FXSYS_memcpy(dest_scan, src_scan, width * Bpp); + } + } + } else { + if (m_pPalette) + return false; + + if (m_bpp == 8) + dest_format = FXDIB_8bppMask; + + uint8_t* dest_buf = + m_pBuffer + dest_top * m_Pitch + dest_left * GetBPP() / 8; + std::unique_ptr<uint32_t, FxFreeDeleter> d_plt; + if (!ConvertBuffer(dest_format, dest_buf, m_Pitch, width, height, + pSrcBitmap, src_left, src_top, &d_plt)) { + return false; + } + } + return true; +} + +bool CFX_DIBitmap::TransferMask(int dest_left, + int dest_top, + int width, + int height, + const CFX_RetainPtr<CFX_DIBSource>& pMask, + uint32_t color, + int src_left, + int src_top, + int alpha_flag, + void* pIccTransform) { + if (!m_pBuffer) { + return false; + } + ASSERT(HasAlpha() && (m_bpp >= 24)); + ASSERT(pMask->IsAlphaMask()); + if (!HasAlpha() || !pMask->IsAlphaMask() || m_bpp < 24) { + return false; + } + GetOverlapRect(dest_left, dest_top, width, height, pMask->GetWidth(), + pMask->GetHeight(), src_left, src_top, nullptr); + if (width == 0 || height == 0) { + return true; + } + int src_bpp = pMask->GetBPP(); + int alpha; + uint32_t dst_color; + if (alpha_flag >> 8) { + alpha = alpha_flag & 0xff; + dst_color = FXCMYK_TODIB(color); + } else { + alpha = FXARGB_A(color); + dst_color = FXARGB_TODIB(color); + } + uint8_t* color_p = (uint8_t*)&dst_color; + if (pIccTransform && CFX_GEModule::Get()->GetCodecModule() && + CFX_GEModule::Get()->GetCodecModule()->GetIccModule()) { + CCodec_IccModule* pIccModule = + CFX_GEModule::Get()->GetCodecModule()->GetIccModule(); + pIccModule->TranslateScanline(pIccTransform, color_p, color_p, 1); + } else { + if (alpha_flag >> 8 && !IsCmykImage()) { + AdobeCMYK_to_sRGB1(FXSYS_GetCValue(color), FXSYS_GetMValue(color), + FXSYS_GetYValue(color), FXSYS_GetKValue(color), + color_p[2], color_p[1], color_p[0]); + } else if (!(alpha_flag >> 8) && IsCmykImage()) { + return false; + } + } + if (!IsCmykImage()) { + color_p[3] = (uint8_t)alpha; + } + if (GetFormat() == FXDIB_Argb) { + for (int row = 0; row < height; row++) { + uint32_t* dest_pos = + (uint32_t*)(m_pBuffer + (dest_top + row) * m_Pitch + dest_left * 4); + const uint8_t* src_scan = pMask->GetScanline(src_top + row); + if (src_bpp == 1) { + for (int col = 0; col < width; col++) { + int src_bitpos = src_left + col; + if (src_scan[src_bitpos / 8] & (1 << (7 - src_bitpos % 8))) { + *dest_pos = dst_color; + } else { + *dest_pos = 0; + } + dest_pos++; + } + } else { + src_scan += src_left; + dst_color = FXARGB_TODIB(dst_color); + dst_color &= 0xffffff; + for (int col = 0; col < width; col++) { + FXARGB_SETDIB(dest_pos++, + dst_color | ((alpha * (*src_scan++) / 255) << 24)); + } + } + } + } else { + int comps = m_bpp / 8; + for (int row = 0; row < height; row++) { + uint8_t* dest_color_pos = + m_pBuffer + (dest_top + row) * m_Pitch + dest_left * comps; + uint8_t* dest_alpha_pos = + (uint8_t*)m_pAlphaMask->GetScanline(dest_top + row) + dest_left; + const uint8_t* src_scan = pMask->GetScanline(src_top + row); + if (src_bpp == 1) { + for (int col = 0; col < width; col++) { + int src_bitpos = src_left + col; + if (src_scan[src_bitpos / 8] & (1 << (7 - src_bitpos % 8))) { + FXSYS_memcpy(dest_color_pos, color_p, comps); + *dest_alpha_pos = 0xff; + } else { + FXSYS_memset(dest_color_pos, 0, comps); + *dest_alpha_pos = 0; + } + dest_color_pos += comps; + dest_alpha_pos++; + } + } else { + src_scan += src_left; + for (int col = 0; col < width; col++) { + FXSYS_memcpy(dest_color_pos, color_p, comps); + dest_color_pos += comps; + *dest_alpha_pos++ = (alpha * (*src_scan++) / 255); + } + } + } + } + return true; +} + +const int g_ChannelOffset[] = {0, 2, 1, 0, 0, 1, 2, 3, 3}; +bool CFX_DIBitmap::LoadChannel(FXDIB_Channel destChannel, + const CFX_RetainPtr<CFX_DIBSource>& pSrcBitmap, + FXDIB_Channel srcChannel) { + if (!m_pBuffer) + return false; + + CFX_RetainPtr<CFX_DIBSource> pSrcClone = pSrcBitmap; + int srcOffset; + if (srcChannel == FXDIB_Alpha) { + if (!pSrcBitmap->HasAlpha() && !pSrcBitmap->IsAlphaMask()) + return false; + + if (pSrcBitmap->GetBPP() == 1) { + pSrcClone = pSrcBitmap->CloneConvert(FXDIB_8bppMask); + if (!pSrcClone) + return false; + } + srcOffset = pSrcBitmap->GetFormat() == FXDIB_Argb ? 3 : 0; + } else { + if (pSrcBitmap->IsAlphaMask()) + return false; + + if (pSrcBitmap->GetBPP() < 24) { + if (pSrcBitmap->IsCmykImage()) { + pSrcClone = pSrcBitmap->CloneConvert(static_cast<FXDIB_Format>( + (pSrcBitmap->GetFormat() & 0xff00) | 0x20)); + } else { + pSrcClone = pSrcBitmap->CloneConvert(static_cast<FXDIB_Format>( + (pSrcBitmap->GetFormat() & 0xff00) | 0x18)); + } + if (!pSrcClone) + return false; + } + srcOffset = g_ChannelOffset[srcChannel]; + } + int destOffset = 0; + if (destChannel == FXDIB_Alpha) { + if (IsAlphaMask()) { + if (!ConvertFormat(FXDIB_8bppMask)) + return false; + } else { + if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyka : FXDIB_Argb)) + return false; + + if (GetFormat() == FXDIB_Argb) + destOffset = 3; + } + } else { + if (IsAlphaMask()) + return false; + + if (GetBPP() < 24) { + if (HasAlpha()) { + if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyka : FXDIB_Argb)) + return false; +#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ + } else if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyk : FXDIB_Rgb32)) { +#else + } else if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyk : FXDIB_Rgb)) { +#endif + return false; + } + } + destOffset = g_ChannelOffset[destChannel]; + } + if (srcChannel == FXDIB_Alpha && pSrcClone->m_pAlphaMask) { + CFX_RetainPtr<CFX_DIBSource> pAlphaMask = pSrcClone->m_pAlphaMask; + if (pSrcClone->GetWidth() != m_Width || + pSrcClone->GetHeight() != m_Height) { + if (pAlphaMask) { + pAlphaMask = pAlphaMask->StretchTo(m_Width, m_Height); + if (!pAlphaMask) + return false; + } + } + pSrcClone = std::move(pAlphaMask); + srcOffset = 0; + } else if (pSrcClone->GetWidth() != m_Width || + pSrcClone->GetHeight() != m_Height) { + CFX_RetainPtr<CFX_DIBitmap> pSrcMatched = + pSrcClone->StretchTo(m_Width, m_Height); + if (!pSrcMatched) + return false; + + pSrcClone = std::move(pSrcMatched); + } + CFX_RetainPtr<CFX_DIBitmap> pDst(this); + if (destChannel == FXDIB_Alpha && m_pAlphaMask) { + pDst = m_pAlphaMask; + destOffset = 0; + } + int srcBytes = pSrcClone->GetBPP() / 8; + int destBytes = pDst->GetBPP() / 8; + for (int row = 0; row < m_Height; row++) { + uint8_t* dest_pos = (uint8_t*)pDst->GetScanline(row) + destOffset; + const uint8_t* src_pos = pSrcClone->GetScanline(row) + srcOffset; + for (int col = 0; col < m_Width; col++) { + *dest_pos = *src_pos; + dest_pos += destBytes; + src_pos += srcBytes; + } + } + return true; +} + +bool CFX_DIBitmap::LoadChannel(FXDIB_Channel destChannel, int value) { + if (!m_pBuffer) { + return false; + } + int destOffset; + if (destChannel == FXDIB_Alpha) { + if (IsAlphaMask()) { + if (!ConvertFormat(FXDIB_8bppMask)) { + return false; + } + destOffset = 0; + } else { + destOffset = 0; + if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyka : FXDIB_Argb)) { + return false; + } + if (GetFormat() == FXDIB_Argb) { + destOffset = 3; + } + } + } else { + if (IsAlphaMask()) { + return false; + } + if (GetBPP() < 24) { + if (HasAlpha()) { + if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyka : FXDIB_Argb)) { + return false; + } +#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ + } else if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyk : FXDIB_Rgb)) { +#else + } else if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyk : FXDIB_Rgb32)) { +#endif + return false; + } + } + destOffset = g_ChannelOffset[destChannel]; + } + int Bpp = GetBPP() / 8; + if (Bpp == 1) { + FXSYS_memset(m_pBuffer, value, m_Height * m_Pitch); + return true; + } + if (destChannel == FXDIB_Alpha && m_pAlphaMask) { + FXSYS_memset(m_pAlphaMask->GetBuffer(), value, + m_pAlphaMask->GetHeight() * m_pAlphaMask->GetPitch()); + return true; + } + for (int row = 0; row < m_Height; row++) { + uint8_t* scan_line = m_pBuffer + row * m_Pitch + destOffset; + for (int col = 0; col < m_Width; col++) { + *scan_line = value; + scan_line += Bpp; + } + } + return true; +} + +bool CFX_DIBitmap::MultiplyAlpha( + const CFX_RetainPtr<CFX_DIBSource>& pSrcBitmap) { + if (!m_pBuffer) + return false; + + ASSERT(pSrcBitmap->IsAlphaMask()); + if (!pSrcBitmap->IsAlphaMask()) + return false; + + if (!IsAlphaMask() && !HasAlpha()) + return LoadChannel(FXDIB_Alpha, pSrcBitmap, FXDIB_Alpha); + + CFX_RetainPtr<CFX_DIBitmap> pSrcClone = pSrcBitmap.As<CFX_DIBitmap>(); + if (pSrcBitmap->GetWidth() != m_Width || + pSrcBitmap->GetHeight() != m_Height) { + pSrcClone = pSrcBitmap->StretchTo(m_Width, m_Height); + if (!pSrcClone) + return false; + } + if (IsAlphaMask()) { + if (!ConvertFormat(FXDIB_8bppMask)) + return false; + + for (int row = 0; row < m_Height; row++) { + uint8_t* dest_scan = m_pBuffer + m_Pitch * row; + uint8_t* src_scan = pSrcClone->m_pBuffer + pSrcClone->m_Pitch * row; + if (pSrcClone->GetBPP() == 1) { + for (int col = 0; col < m_Width; col++) { + if (!((1 << (7 - col % 8)) & src_scan[col / 8])) + dest_scan[col] = 0; + } + } else { + for (int col = 0; col < m_Width; col++) { + *dest_scan = (*dest_scan) * src_scan[col] / 255; + dest_scan++; + } + } + } + } else { + if (GetFormat() == FXDIB_Argb) { + if (pSrcClone->GetBPP() == 1) + return false; + + for (int row = 0; row < m_Height; row++) { + uint8_t* dest_scan = m_pBuffer + m_Pitch * row + 3; + uint8_t* src_scan = pSrcClone->m_pBuffer + pSrcClone->m_Pitch * row; + for (int col = 0; col < m_Width; col++) { + *dest_scan = (*dest_scan) * src_scan[col] / 255; + dest_scan += 4; + } + } + } else { + m_pAlphaMask->MultiplyAlpha(pSrcClone); + } + } + return true; +} + +bool CFX_DIBitmap::GetGrayData(void* pIccTransform) { + if (!m_pBuffer) { + return false; + } + switch (GetFormat()) { + case FXDIB_1bppRgb: { + if (!m_pPalette) + return false; + + uint8_t gray[2]; + for (int i = 0; i < 2; i++) { + int r = static_cast<uint8_t>(m_pPalette.get()[i] >> 16); + int g = static_cast<uint8_t>(m_pPalette.get()[i] >> 8); + int b = static_cast<uint8_t>(m_pPalette.get()[i]); + gray[i] = static_cast<uint8_t>(FXRGB2GRAY(r, g, b)); + } + auto pMask = pdfium::MakeRetain<CFX_DIBitmap>(); + if (!pMask->Create(m_Width, m_Height, FXDIB_8bppMask)) + return false; + + FXSYS_memset(pMask->GetBuffer(), gray[0], pMask->GetPitch() * m_Height); + for (int row = 0; row < m_Height; row++) { + uint8_t* src_pos = m_pBuffer + row * m_Pitch; + uint8_t* dest_pos = (uint8_t*)pMask->GetScanline(row); + for (int col = 0; col < m_Width; col++) { + if (src_pos[col / 8] & (1 << (7 - col % 8))) { + *dest_pos = gray[1]; + } + dest_pos++; + } + } + TakeOver(std::move(pMask)); + break; + } + case FXDIB_8bppRgb: { + if (!m_pPalette) + return false; + + uint8_t gray[256]; + for (int i = 0; i < 256; i++) { + int r = static_cast<uint8_t>(m_pPalette.get()[i] >> 16); + int g = static_cast<uint8_t>(m_pPalette.get()[i] >> 8); + int b = static_cast<uint8_t>(m_pPalette.get()[i]); + gray[i] = static_cast<uint8_t>(FXRGB2GRAY(r, g, b)); + } + auto pMask = pdfium::MakeRetain<CFX_DIBitmap>(); + if (!pMask->Create(m_Width, m_Height, FXDIB_8bppMask)) + return false; + + for (int row = 0; row < m_Height; row++) { + uint8_t* dest_pos = pMask->GetBuffer() + row * pMask->GetPitch(); + uint8_t* src_pos = m_pBuffer + row * m_Pitch; + for (int col = 0; col < m_Width; col++) { + *dest_pos++ = gray[*src_pos++]; + } + } + TakeOver(std::move(pMask)); + break; + } + case FXDIB_Rgb: { + auto pMask = pdfium::MakeRetain<CFX_DIBitmap>(); + if (!pMask->Create(m_Width, m_Height, FXDIB_8bppMask)) + return false; + + for (int row = 0; row < m_Height; row++) { + uint8_t* src_pos = m_pBuffer + row * m_Pitch; + uint8_t* dest_pos = pMask->GetBuffer() + row * pMask->GetPitch(); + for (int col = 0; col < m_Width; col++) { + *dest_pos++ = FXRGB2GRAY(src_pos[2], src_pos[1], *src_pos); + src_pos += 3; + } + } + TakeOver(std::move(pMask)); + break; + } + case FXDIB_Rgb32: { + auto pMask = pdfium::MakeRetain<CFX_DIBitmap>(); + if (!pMask->Create(m_Width, m_Height, FXDIB_8bppMask)) + return false; + + for (int row = 0; row < m_Height; row++) { + uint8_t* src_pos = m_pBuffer + row * m_Pitch; + uint8_t* dest_pos = pMask->GetBuffer() + row * pMask->GetPitch(); + for (int col = 0; col < m_Width; col++) { + *dest_pos++ = FXRGB2GRAY(src_pos[2], src_pos[1], *src_pos); + src_pos += 4; + } + } + TakeOver(std::move(pMask)); + break; + } + default: + return false; + } + return true; +} + +bool CFX_DIBitmap::MultiplyAlpha(int alpha) { + if (!m_pBuffer) { + return false; + } + switch (GetFormat()) { + case FXDIB_1bppMask: + if (!ConvertFormat(FXDIB_8bppMask)) { + return false; + } + MultiplyAlpha(alpha); + break; + case FXDIB_8bppMask: { + for (int row = 0; row < m_Height; row++) { + uint8_t* scan_line = m_pBuffer + row * m_Pitch; + for (int col = 0; col < m_Width; col++) { + scan_line[col] = scan_line[col] * alpha / 255; + } + } + break; + } + case FXDIB_Argb: { + for (int row = 0; row < m_Height; row++) { + uint8_t* scan_line = m_pBuffer + row * m_Pitch + 3; + for (int col = 0; col < m_Width; col++) { + *scan_line = (*scan_line) * alpha / 255; + scan_line += 4; + } + } + break; + } + default: + if (HasAlpha()) { + m_pAlphaMask->MultiplyAlpha(alpha); + } else if (IsCmykImage()) { + if (!ConvertFormat((FXDIB_Format)(GetFormat() | 0x0200))) { + return false; + } + m_pAlphaMask->MultiplyAlpha(alpha); + } else { + if (!ConvertFormat(FXDIB_Argb)) { + return false; + } + MultiplyAlpha(alpha); + } + break; + } + return true; +} + +uint32_t CFX_DIBitmap::GetPixel(int x, int y) const { + if (!m_pBuffer) { + return 0; + } + uint8_t* pos = m_pBuffer + y * m_Pitch + x * GetBPP() / 8; + switch (GetFormat()) { + case FXDIB_1bppMask: { + if ((*pos) & (1 << (7 - x % 8))) { + return 0xff000000; + } + return 0; + } + case FXDIB_1bppRgb: { + if ((*pos) & (1 << (7 - x % 8))) { + return m_pPalette ? m_pPalette.get()[1] : 0xffffffff; + } + return m_pPalette ? m_pPalette.get()[0] : 0xff000000; + } + case FXDIB_8bppMask: + return (*pos) << 24; + case FXDIB_8bppRgb: + return m_pPalette ? m_pPalette.get()[*pos] + : (0xff000000 | ((*pos) * 0x10101)); + case FXDIB_Rgb: + case FXDIB_Rgba: + case FXDIB_Rgb32: + return FXARGB_GETDIB(pos) | 0xff000000; + case FXDIB_Argb: + return FXARGB_GETDIB(pos); + default: + break; + } + return 0; +} + +void CFX_DIBitmap::SetPixel(int x, int y, uint32_t color) { + if (!m_pBuffer) { + return; + } + if (x < 0 || x >= m_Width || y < 0 || y >= m_Height) { + return; + } + uint8_t* pos = m_pBuffer + y * m_Pitch + x * GetBPP() / 8; + switch (GetFormat()) { + case FXDIB_1bppMask: + if (color >> 24) { + *pos |= 1 << (7 - x % 8); + } else { + *pos &= ~(1 << (7 - x % 8)); + } + break; + case FXDIB_1bppRgb: + if (m_pPalette) { + if (color == m_pPalette.get()[1]) { + *pos |= 1 << (7 - x % 8); + } else { + *pos &= ~(1 << (7 - x % 8)); + } + } else { + if (color == 0xffffffff) { + *pos |= 1 << (7 - x % 8); + } else { + *pos &= ~(1 << (7 - x % 8)); + } + } + break; + case FXDIB_8bppMask: + *pos = (uint8_t)(color >> 24); + break; + case FXDIB_8bppRgb: { + if (m_pPalette) { + for (int i = 0; i < 256; i++) { + if (m_pPalette.get()[i] == color) { + *pos = (uint8_t)i; + return; + } + } + *pos = 0; + } else { + *pos = FXRGB2GRAY(FXARGB_R(color), FXARGB_G(color), FXARGB_B(color)); + } + break; + } + case FXDIB_Rgb: + case FXDIB_Rgb32: { + int alpha = FXARGB_A(color); + pos[0] = (FXARGB_B(color) * alpha + pos[0] * (255 - alpha)) / 255; + pos[1] = (FXARGB_G(color) * alpha + pos[1] * (255 - alpha)) / 255; + pos[2] = (FXARGB_R(color) * alpha + pos[2] * (255 - alpha)) / 255; + break; + } + case FXDIB_Rgba: { + pos[0] = FXARGB_B(color); + pos[1] = FXARGB_G(color); + pos[2] = FXARGB_R(color); + break; + } + case FXDIB_Argb: + FXARGB_SETDIB(pos, color); + break; + default: + break; + } +} + +void CFX_DIBitmap::DownSampleScanline(int line, + uint8_t* dest_scan, + int dest_bpp, + int dest_width, + bool bFlipX, + int clip_left, + int clip_width) const { + if (!m_pBuffer) { + return; + } + int src_Bpp = m_bpp / 8; + uint8_t* scanline = m_pBuffer + line * m_Pitch; + if (src_Bpp == 0) { + for (int i = 0; i < clip_width; i++) { + uint32_t dest_x = clip_left + i; + uint32_t src_x = dest_x * m_Width / dest_width; + if (bFlipX) { + src_x = m_Width - src_x - 1; + } + src_x %= m_Width; + dest_scan[i] = (scanline[src_x / 8] & (1 << (7 - src_x % 8))) ? 255 : 0; + } + } else if (src_Bpp == 1) { + for (int i = 0; i < clip_width; i++) { + uint32_t dest_x = clip_left + i; + uint32_t src_x = dest_x * m_Width / dest_width; + if (bFlipX) { + src_x = m_Width - src_x - 1; + } + src_x %= m_Width; + int dest_pos = i; + if (m_pPalette) { + if (!IsCmykImage()) { + dest_pos *= 3; + FX_ARGB argb = m_pPalette.get()[scanline[src_x]]; + dest_scan[dest_pos] = FXARGB_B(argb); + dest_scan[dest_pos + 1] = FXARGB_G(argb); + dest_scan[dest_pos + 2] = FXARGB_R(argb); + } else { + dest_pos *= 4; + FX_CMYK cmyk = m_pPalette.get()[scanline[src_x]]; + dest_scan[dest_pos] = FXSYS_GetCValue(cmyk); + dest_scan[dest_pos + 1] = FXSYS_GetMValue(cmyk); + dest_scan[dest_pos + 2] = FXSYS_GetYValue(cmyk); + dest_scan[dest_pos + 3] = FXSYS_GetKValue(cmyk); + } + } else { + dest_scan[dest_pos] = scanline[src_x]; + } + } + } else { + for (int i = 0; i < clip_width; i++) { + uint32_t dest_x = clip_left + i; + uint32_t src_x = + bFlipX ? (m_Width - dest_x * m_Width / dest_width - 1) * src_Bpp + : (dest_x * m_Width / dest_width) * src_Bpp; + src_x %= m_Width * src_Bpp; + int dest_pos = i * src_Bpp; + for (int b = 0; b < src_Bpp; b++) { + dest_scan[dest_pos + b] = scanline[src_x + b]; + } + } + } +} + +// TODO(weili): Split this function into two for handling CMYK and RGB +// colors separately. +bool CFX_DIBitmap::ConvertColorScale(uint32_t forecolor, uint32_t backcolor) { + ASSERT(!IsAlphaMask()); + if (!m_pBuffer || IsAlphaMask()) { + return false; + } + // Values used for CMYK colors. + int fc = 0; + int fm = 0; + int fy = 0; + int fk = 0; + int bc = 0; + int bm = 0; + int by = 0; + int bk = 0; + // Values used for RGB colors. + int fr = 0; + int fg = 0; + int fb = 0; + int br = 0; + int bg = 0; + int bb = 0; + bool isCmykImage = IsCmykImage(); + if (isCmykImage) { + fc = FXSYS_GetCValue(forecolor); + fm = FXSYS_GetMValue(forecolor); + fy = FXSYS_GetYValue(forecolor); + fk = FXSYS_GetKValue(forecolor); + bc = FXSYS_GetCValue(backcolor); + bm = FXSYS_GetMValue(backcolor); + by = FXSYS_GetYValue(backcolor); + bk = FXSYS_GetKValue(backcolor); + } else { + fr = FXSYS_GetRValue(forecolor); + fg = FXSYS_GetGValue(forecolor); + fb = FXSYS_GetBValue(forecolor); + br = FXSYS_GetRValue(backcolor); + bg = FXSYS_GetGValue(backcolor); + bb = FXSYS_GetBValue(backcolor); + } + if (m_bpp <= 8) { + if (isCmykImage) { + if (forecolor == 0xff && backcolor == 0 && !m_pPalette) { + return true; + } + } else if (forecolor == 0 && backcolor == 0xffffff && !m_pPalette) { + return true; + } + if (!m_pPalette) { + BuildPalette(); + } + int size = 1 << m_bpp; + if (isCmykImage) { + for (int i = 0; i < size; i++) { + uint8_t b, g, r; + AdobeCMYK_to_sRGB1(FXSYS_GetCValue(m_pPalette.get()[i]), + FXSYS_GetMValue(m_pPalette.get()[i]), + FXSYS_GetYValue(m_pPalette.get()[i]), + FXSYS_GetKValue(m_pPalette.get()[i]), r, g, b); + int gray = 255 - FXRGB2GRAY(r, g, b); + m_pPalette.get()[i] = CmykEncode( + bc + (fc - bc) * gray / 255, bm + (fm - bm) * gray / 255, + by + (fy - by) * gray / 255, bk + (fk - bk) * gray / 255); + } + } else { + for (int i = 0; i < size; i++) { + int gray = FXRGB2GRAY(FXARGB_R(m_pPalette.get()[i]), + FXARGB_G(m_pPalette.get()[i]), + FXARGB_B(m_pPalette.get()[i])); + m_pPalette.get()[i] = FXARGB_MAKE(0xff, br + (fr - br) * gray / 255, + bg + (fg - bg) * gray / 255, + bb + (fb - bb) * gray / 255); + } + } + return true; + } + if (isCmykImage) { + if (forecolor == 0xff && backcolor == 0x00) { + for (int row = 0; row < m_Height; row++) { + uint8_t* scanline = m_pBuffer + row * m_Pitch; + for (int col = 0; col < m_Width; col++) { + uint8_t b, g, r; + AdobeCMYK_to_sRGB1(scanline[0], scanline[1], scanline[2], scanline[3], + r, g, b); + *scanline++ = 0; + *scanline++ = 0; + *scanline++ = 0; + *scanline++ = 255 - FXRGB2GRAY(r, g, b); + } + } + return true; + } + } else if (forecolor == 0 && backcolor == 0xffffff) { + for (int row = 0; row < m_Height; row++) { + uint8_t* scanline = m_pBuffer + row * m_Pitch; + int gap = m_bpp / 8 - 2; + for (int col = 0; col < m_Width; col++) { + int gray = FXRGB2GRAY(scanline[2], scanline[1], scanline[0]); + *scanline++ = gray; + *scanline++ = gray; + *scanline = gray; + scanline += gap; + } + } + return true; + } + if (isCmykImage) { + for (int row = 0; row < m_Height; row++) { + uint8_t* scanline = m_pBuffer + row * m_Pitch; + for (int col = 0; col < m_Width; col++) { + uint8_t b, g, r; + AdobeCMYK_to_sRGB1(scanline[0], scanline[1], scanline[2], scanline[3], + r, g, b); + int gray = 255 - FXRGB2GRAY(r, g, b); + *scanline++ = bc + (fc - bc) * gray / 255; + *scanline++ = bm + (fm - bm) * gray / 255; + *scanline++ = by + (fy - by) * gray / 255; + *scanline++ = bk + (fk - bk) * gray / 255; + } + } + } else { + for (int row = 0; row < m_Height; row++) { + uint8_t* scanline = m_pBuffer + row * m_Pitch; + int gap = m_bpp / 8 - 2; + for (int col = 0; col < m_Width; col++) { + int gray = FXRGB2GRAY(scanline[2], scanline[1], scanline[0]); + *scanline++ = bb + (fb - bb) * gray / 255; + *scanline++ = bg + (fg - bg) * gray / 255; + *scanline = br + (fr - br) * gray / 255; + scanline += gap; + } + } + } + return true; +} + +bool CFX_DIBitmap::CompositeBitmap( + int dest_left, + int dest_top, + int width, + int height, + const CFX_RetainPtr<CFX_DIBSource>& pSrcBitmap, + int src_left, + int src_top, + int blend_type, + const CFX_ClipRgn* pClipRgn, + bool bRgbByteOrder, + void* pIccTransform) { + if (!m_pBuffer) { + return false; + } + ASSERT(!pSrcBitmap->IsAlphaMask()); + ASSERT(m_bpp >= 8); + if (pSrcBitmap->IsAlphaMask() || m_bpp < 8) { + return false; + } + GetOverlapRect(dest_left, dest_top, width, height, pSrcBitmap->GetWidth(), + pSrcBitmap->GetHeight(), src_left, src_top, pClipRgn); + if (width == 0 || height == 0) { + return true; + } + CFX_RetainPtr<CFX_DIBitmap> pClipMask; + FX_RECT clip_box; + if (pClipRgn && pClipRgn->GetType() != CFX_ClipRgn::RectI) { + ASSERT(pClipRgn->GetType() == CFX_ClipRgn::MaskF); + pClipMask = pClipRgn->GetMask(); + clip_box = pClipRgn->GetBox(); + } + CFX_ScanlineCompositor compositor; + if (!compositor.Init(GetFormat(), pSrcBitmap->GetFormat(), width, + pSrcBitmap->GetPalette(), 0, blend_type, + pClipMask != nullptr, bRgbByteOrder, 0, pIccTransform)) { + return false; + } + int dest_Bpp = m_bpp / 8; + int src_Bpp = pSrcBitmap->GetBPP() / 8; + bool bRgb = src_Bpp > 1 && !pSrcBitmap->IsCmykImage(); + CFX_RetainPtr<CFX_DIBitmap> pSrcAlphaMask = pSrcBitmap->m_pAlphaMask; + for (int row = 0; row < height; row++) { + uint8_t* dest_scan = + m_pBuffer + (dest_top + row) * m_Pitch + dest_left * dest_Bpp; + const uint8_t* src_scan = + pSrcBitmap->GetScanline(src_top + row) + src_left * src_Bpp; + const uint8_t* src_scan_extra_alpha = + pSrcAlphaMask ? pSrcAlphaMask->GetScanline(src_top + row) + src_left + : nullptr; + uint8_t* dst_scan_extra_alpha = + m_pAlphaMask + ? (uint8_t*)m_pAlphaMask->GetScanline(dest_top + row) + dest_left + : nullptr; + const uint8_t* clip_scan = nullptr; + if (pClipMask) { + clip_scan = pClipMask->m_pBuffer + + (dest_top + row - clip_box.top) * pClipMask->m_Pitch + + (dest_left - clip_box.left); + } + if (bRgb) { + compositor.CompositeRgbBitmapLine(dest_scan, src_scan, width, clip_scan, + src_scan_extra_alpha, + dst_scan_extra_alpha); + } else { + compositor.CompositePalBitmapLine(dest_scan, src_scan, src_left, width, + clip_scan, src_scan_extra_alpha, + dst_scan_extra_alpha); + } + } + return true; +} + +bool CFX_DIBitmap::CompositeMask(int dest_left, + int dest_top, + int width, + int height, + const CFX_RetainPtr<CFX_DIBSource>& pMask, + uint32_t color, + int src_left, + int src_top, + int blend_type, + const CFX_ClipRgn* pClipRgn, + bool bRgbByteOrder, + int alpha_flag, + void* pIccTransform) { + if (!m_pBuffer) { + return false; + } + ASSERT(pMask->IsAlphaMask()); + ASSERT(m_bpp >= 8); + if (!pMask->IsAlphaMask() || m_bpp < 8) { + return false; + } + GetOverlapRect(dest_left, dest_top, width, height, pMask->GetWidth(), + pMask->GetHeight(), src_left, src_top, pClipRgn); + if (width == 0 || height == 0) { + return true; + } + int src_alpha = + (uint8_t)(alpha_flag >> 8) ? (alpha_flag & 0xff) : FXARGB_A(color); + if (src_alpha == 0) { + return true; + } + CFX_RetainPtr<CFX_DIBitmap> pClipMask; + FX_RECT clip_box; + if (pClipRgn && pClipRgn->GetType() != CFX_ClipRgn::RectI) { + ASSERT(pClipRgn->GetType() == CFX_ClipRgn::MaskF); + pClipMask = pClipRgn->GetMask(); + clip_box = pClipRgn->GetBox(); + } + int src_bpp = pMask->GetBPP(); + int Bpp = GetBPP() / 8; + CFX_ScanlineCompositor compositor; + if (!compositor.Init(GetFormat(), pMask->GetFormat(), width, nullptr, color, + blend_type, pClipMask != nullptr, bRgbByteOrder, + alpha_flag, pIccTransform)) { + return false; + } + for (int row = 0; row < height; row++) { + uint8_t* dest_scan = + m_pBuffer + (dest_top + row) * m_Pitch + dest_left * Bpp; + const uint8_t* src_scan = pMask->GetScanline(src_top + row); + uint8_t* dst_scan_extra_alpha = + m_pAlphaMask + ? (uint8_t*)m_pAlphaMask->GetScanline(dest_top + row) + dest_left + : nullptr; + const uint8_t* clip_scan = nullptr; + if (pClipMask) { + clip_scan = pClipMask->m_pBuffer + + (dest_top + row - clip_box.top) * pClipMask->m_Pitch + + (dest_left - clip_box.left); + } + if (src_bpp == 1) { + compositor.CompositeBitMaskLine(dest_scan, src_scan, src_left, width, + clip_scan, dst_scan_extra_alpha); + } else { + compositor.CompositeByteMaskLine(dest_scan, src_scan + src_left, width, + clip_scan, dst_scan_extra_alpha); + } + } + return true; +} + +bool CFX_DIBitmap::CompositeRect(int left, + int top, + int width, + int height, + uint32_t color, + int alpha_flag, + void* pIccTransform) { + if (!m_pBuffer) { + return false; + } + int src_alpha = (alpha_flag >> 8) ? (alpha_flag & 0xff) : FXARGB_A(color); + if (src_alpha == 0) { + return true; + } + FX_RECT rect(left, top, left + width, top + height); + rect.Intersect(0, 0, m_Width, m_Height); + if (rect.IsEmpty()) { + return true; + } + width = rect.Width(); + uint32_t dst_color; + if (alpha_flag >> 8) { + dst_color = FXCMYK_TODIB(color); + } else { + dst_color = FXARGB_TODIB(color); + } + uint8_t* color_p = (uint8_t*)&dst_color; + if (m_bpp == 8) { + uint8_t gray = 255; + if (!IsAlphaMask()) { + if (pIccTransform && CFX_GEModule::Get()->GetCodecModule() && + CFX_GEModule::Get()->GetCodecModule()->GetIccModule()) { + CCodec_IccModule* pIccModule = + CFX_GEModule::Get()->GetCodecModule()->GetIccModule(); + pIccModule->TranslateScanline(pIccTransform, &gray, color_p, 1); + } else { + if (alpha_flag >> 8) { + uint8_t r, g, b; + AdobeCMYK_to_sRGB1(color_p[0], color_p[1], color_p[2], color_p[3], r, + g, b); + gray = FXRGB2GRAY(r, g, b); + } else { + gray = (uint8_t)FXRGB2GRAY((int)color_p[2], color_p[1], color_p[0]); + } + } + if (IsCmykImage()) { + gray = ~gray; + } + } + for (int row = rect.top; row < rect.bottom; row++) { + uint8_t* dest_scan = m_pBuffer + row * m_Pitch + rect.left; + if (src_alpha == 255) { + FXSYS_memset(dest_scan, gray, width); + } else { + for (int col = 0; col < width; col++) { + *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, gray, src_alpha); + dest_scan++; + } + } + } + return true; + } + if (m_bpp == 1) { + ASSERT(!IsCmykImage() && static_cast<uint8_t>(alpha_flag >> 8) == 0); + int left_shift = rect.left % 8; + int right_shift = rect.right % 8; + int new_width = rect.right / 8 - rect.left / 8; + int index = 0; + if (m_pPalette) { + for (int i = 0; i < 2; i++) { + if (m_pPalette.get()[i] == color) + index = i; + } + } else { + index = (static_cast<uint8_t>(color) == 0xff) ? 1 : 0; + } + for (int row = rect.top; row < rect.bottom; row++) { + uint8_t* dest_scan_top = + const_cast<uint8_t*>(GetScanline(row)) + rect.left / 8; + uint8_t* dest_scan_top_r = + const_cast<uint8_t*>(GetScanline(row)) + rect.right / 8; + uint8_t left_flag = *dest_scan_top & (255 << (8 - left_shift)); + uint8_t right_flag = *dest_scan_top_r & (255 >> right_shift); + if (new_width) { + FXSYS_memset(dest_scan_top + 1, index ? 255 : 0, new_width - 1); + if (!index) { + *dest_scan_top &= left_flag; + *dest_scan_top_r &= right_flag; + } else { + *dest_scan_top |= ~left_flag; + *dest_scan_top_r |= ~right_flag; + } + } else { + if (!index) { + *dest_scan_top &= left_flag | right_flag; + } else { + *dest_scan_top |= ~(left_flag | right_flag); + } + } + } + return true; + } + ASSERT(m_bpp >= 24); + if (m_bpp < 24) { + return false; + } + if (pIccTransform && CFX_GEModule::Get()->GetCodecModule()) { + CCodec_IccModule* pIccModule = + CFX_GEModule::Get()->GetCodecModule()->GetIccModule(); + pIccModule->TranslateScanline(pIccTransform, color_p, color_p, 1); + } else { + if (alpha_flag >> 8 && !IsCmykImage()) { + AdobeCMYK_to_sRGB1(FXSYS_GetCValue(color), FXSYS_GetMValue(color), + FXSYS_GetYValue(color), FXSYS_GetKValue(color), + color_p[2], color_p[1], color_p[0]); + } else if (!(alpha_flag >> 8) && IsCmykImage()) { + return false; + } + } + if (!IsCmykImage()) { + color_p[3] = (uint8_t)src_alpha; + } + int Bpp = m_bpp / 8; + bool bAlpha = HasAlpha(); + bool bArgb = GetFormat() == FXDIB_Argb; + if (src_alpha == 255) { + for (int row = rect.top; row < rect.bottom; row++) { + uint8_t* dest_scan = m_pBuffer + row * m_Pitch + rect.left * Bpp; + uint8_t* dest_scan_alpha = + m_pAlphaMask ? (uint8_t*)m_pAlphaMask->GetScanline(row) + rect.left + : nullptr; + if (dest_scan_alpha) { + FXSYS_memset(dest_scan_alpha, 0xff, width); + } + if (Bpp == 4) { + uint32_t* scan = (uint32_t*)dest_scan; + for (int col = 0; col < width; col++) { + *scan++ = dst_color; + } + } else { + for (int col = 0; col < width; col++) { + *dest_scan++ = color_p[0]; + *dest_scan++ = color_p[1]; + *dest_scan++ = color_p[2]; + } + } + } + return true; + } + for (int row = rect.top; row < rect.bottom; row++) { + uint8_t* dest_scan = m_pBuffer + row * m_Pitch + rect.left * Bpp; + if (bAlpha) { + if (bArgb) { + for (int col = 0; col < width; col++) { + uint8_t back_alpha = dest_scan[3]; + if (back_alpha == 0) { + FXARGB_SETDIB(dest_scan, FXARGB_MAKE(src_alpha, color_p[2], + color_p[1], color_p[0])); + dest_scan += 4; + continue; + } + uint8_t dest_alpha = + back_alpha + src_alpha - back_alpha * src_alpha / 255; + int alpha_ratio = src_alpha * 255 / dest_alpha; + *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, color_p[0], alpha_ratio); + dest_scan++; + *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, color_p[1], alpha_ratio); + dest_scan++; + *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, color_p[2], alpha_ratio); + dest_scan++; + *dest_scan++ = dest_alpha; + } + } else { + uint8_t* dest_scan_alpha = + (uint8_t*)m_pAlphaMask->GetScanline(row) + rect.left; + for (int col = 0; col < width; col++) { + uint8_t back_alpha = *dest_scan_alpha; + if (back_alpha == 0) { + *dest_scan_alpha++ = src_alpha; + FXSYS_memcpy(dest_scan, color_p, Bpp); + dest_scan += Bpp; + continue; + } + uint8_t dest_alpha = + back_alpha + src_alpha - back_alpha * src_alpha / 255; + *dest_scan_alpha++ = dest_alpha; + int alpha_ratio = src_alpha * 255 / dest_alpha; + for (int comps = 0; comps < Bpp; comps++) { + *dest_scan = + FXDIB_ALPHA_MERGE(*dest_scan, color_p[comps], alpha_ratio); + dest_scan++; + } + } + } + } else { + for (int col = 0; col < width; col++) { + for (int comps = 0; comps < Bpp; comps++) { + if (comps == 3) { + *dest_scan++ = 255; + continue; + } + *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, color_p[comps], src_alpha); + dest_scan++; + } + } + } + } + return true; +} + +bool CFX_DIBitmap::ConvertFormat(FXDIB_Format dest_format) { + FXDIB_Format src_format = GetFormat(); + if (dest_format == src_format) + return true; + + if (dest_format == FXDIB_8bppMask && src_format == FXDIB_8bppRgb && + !m_pPalette) { + m_AlphaFlag = 1; + return true; + } + if (dest_format == FXDIB_Argb && src_format == FXDIB_Rgb32) { + m_AlphaFlag = 2; + for (int row = 0; row < m_Height; row++) { + uint8_t* scanline = m_pBuffer + row * m_Pitch + 3; + for (int col = 0; col < m_Width; col++) { + *scanline = 0xff; + scanline += 4; + } + } + return true; + } + int dest_bpp = dest_format & 0xff; + int dest_pitch = (dest_bpp * m_Width + 31) / 32 * 4; + uint8_t* dest_buf = FX_TryAlloc(uint8_t, dest_pitch * m_Height + 4); + if (!dest_buf) { + return false; + } + CFX_RetainPtr<CFX_DIBitmap> pAlphaMask; + if (dest_format == FXDIB_Argb) { + FXSYS_memset(dest_buf, 0xff, dest_pitch * m_Height + 4); + if (m_pAlphaMask) { + for (int row = 0; row < m_Height; row++) { + uint8_t* pDstScanline = dest_buf + row * dest_pitch + 3; + const uint8_t* pSrcScanline = m_pAlphaMask->GetScanline(row); + for (int col = 0; col < m_Width; col++) { + *pDstScanline = *pSrcScanline++; + pDstScanline += 4; + } + } + } + } else if (dest_format & 0x0200) { + if (src_format == FXDIB_Argb) { + pAlphaMask = CloneAlphaMask(); + if (!pAlphaMask) { + FX_Free(dest_buf); + return false; + } + } else { + if (!m_pAlphaMask) { + if (!BuildAlphaMask()) { + FX_Free(dest_buf); + return false; + } + pAlphaMask = std::move(m_pAlphaMask); + } else { + pAlphaMask = m_pAlphaMask; + } + } + } + bool ret = false; + CFX_RetainPtr<CFX_DIBSource> holder(this); + std::unique_ptr<uint32_t, FxFreeDeleter> pal_8bpp; + ret = ConvertBuffer(dest_format, dest_buf, dest_pitch, m_Width, m_Height, + holder, 0, 0, &pal_8bpp); + if (!ret) { + FX_Free(dest_buf); + return false; + } + m_pAlphaMask = pAlphaMask; + m_pPalette = std::move(pal_8bpp); + if (!m_bExtBuf) + FX_Free(m_pBuffer); + m_bExtBuf = false; + m_pBuffer = dest_buf; + m_bpp = (uint8_t)dest_format; + m_AlphaFlag = (uint8_t)(dest_format >> 8); + m_Pitch = dest_pitch; + return true; +} |