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// Copyright 2014 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 <windows.h>
#include "core/fxcrt/fx_system.h"
#include "core/fxge/cfx_gemodule.h"
#include "core/fxge/win32/cfx_windowsdib.h"
#include "core/fxge/win32/win32_int.h"
ByteString CFX_WindowsDIB::GetBitmapInfo(
const RetainPtr<CFX_DIBitmap>& pBitmap) {
int len = sizeof(BITMAPINFOHEADER);
if (pBitmap->GetBPP() == 1 || pBitmap->GetBPP() == 8)
len += sizeof(DWORD) * (int)(1 << pBitmap->GetBPP());
ByteString result;
{
// Span's lifetime must end before ReleaseBuffer() below.
pdfium::span<char> cspan = result.GetBuffer(len);
BITMAPINFOHEADER* pbmih = reinterpret_cast<BITMAPINFOHEADER*>(cspan.data());
memset(pbmih, 0, sizeof(BITMAPINFOHEADER));
pbmih->biSize = sizeof(BITMAPINFOHEADER);
pbmih->biBitCount = pBitmap->GetBPP();
pbmih->biCompression = BI_RGB;
pbmih->biHeight = -(int)pBitmap->GetHeight();
pbmih->biPlanes = 1;
pbmih->biWidth = pBitmap->GetWidth();
if (pBitmap->GetBPP() == 8) {
uint32_t* pPalette = (uint32_t*)(pbmih + 1);
if (pBitmap->GetPalette()) {
for (int i = 0; i < 256; i++) {
pPalette[i] = pBitmap->GetPalette()[i];
}
} else {
for (int i = 0; i < 256; i++) {
pPalette[i] = i * 0x010101;
}
}
}
if (pBitmap->GetBPP() == 1) {
uint32_t* pPalette = (uint32_t*)(pbmih + 1);
if (pBitmap->GetPalette()) {
pPalette[0] = pBitmap->GetPalette()[0];
pPalette[1] = pBitmap->GetPalette()[1];
} else {
pPalette[0] = 0;
pPalette[1] = 0xffffff;
}
}
}
result.ReleaseBuffer(len);
return result;
}
RetainPtr<CFX_DIBitmap> FX_WindowsDIB_LoadFromBuf(BITMAPINFO* pbmi,
LPVOID pData,
bool bAlpha) {
int width = pbmi->bmiHeader.biWidth;
int height = pbmi->bmiHeader.biHeight;
BOOL bBottomUp = true;
if (height < 0) {
height = -height;
bBottomUp = false;
}
int pitch = (width * pbmi->bmiHeader.biBitCount + 31) / 32 * 4;
auto pBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
FXDIB_Format format = bAlpha
? (FXDIB_Format)(pbmi->bmiHeader.biBitCount + 0x200)
: (FXDIB_Format)pbmi->bmiHeader.biBitCount;
if (!pBitmap->Create(width, height, format))
return nullptr;
memcpy(pBitmap->GetBuffer(), pData, pitch * height);
if (bBottomUp) {
uint8_t* temp_buf = FX_Alloc(uint8_t, pitch);
int top = 0, bottom = height - 1;
while (top < bottom) {
memcpy(temp_buf, pBitmap->GetBuffer() + top * pitch, pitch);
memcpy(pBitmap->GetBuffer() + top * pitch,
pBitmap->GetBuffer() + bottom * pitch, pitch);
memcpy(pBitmap->GetBuffer() + bottom * pitch, temp_buf, pitch);
top++;
bottom--;
}
FX_Free(temp_buf);
temp_buf = nullptr;
}
if (pbmi->bmiHeader.biBitCount == 1) {
for (int i = 0; i < 2; i++)
pBitmap->SetPaletteArgb(i, ((uint32_t*)pbmi->bmiColors)[i] | 0xff000000);
} else if (pbmi->bmiHeader.biBitCount == 8) {
for (int i = 0; i < 256; i++)
pBitmap->SetPaletteArgb(i, ((uint32_t*)pbmi->bmiColors)[i] | 0xff000000);
}
return pBitmap;
}
RetainPtr<CFX_DIBitmap> CFX_WindowsDIB::LoadFromBuf(BITMAPINFO* pbmi,
LPVOID pData) {
return FX_WindowsDIB_LoadFromBuf(pbmi, pData, false);
}
HBITMAP CFX_WindowsDIB::GetDDBitmap(const RetainPtr<CFX_DIBitmap>& pBitmap,
HDC hDC) {
ByteString info = GetBitmapInfo(pBitmap);
return CreateDIBitmap(hDC, (BITMAPINFOHEADER*)info.c_str(), CBM_INIT,
pBitmap->GetBuffer(), (BITMAPINFO*)info.c_str(),
DIB_RGB_COLORS);
}
void GetBitmapSize(HBITMAP hBitmap, int& w, int& h) {
BITMAP bmp;
GetObject(hBitmap, sizeof bmp, &bmp);
w = bmp.bmWidth;
h = bmp.bmHeight;
}
RetainPtr<CFX_DIBitmap> CFX_WindowsDIB::LoadFromFile(const wchar_t* filename) {
CWin32Platform* pPlatform =
(CWin32Platform*)CFX_GEModule::Get()->GetPlatformData();
if (pPlatform->m_GdiplusExt.IsAvailable()) {
WINDIB_Open_Args_ args;
args.flags = WINDIB_OPEN_PATHNAME;
args.path_name = filename;
return pPlatform->m_GdiplusExt.LoadDIBitmap(args);
}
HBITMAP hBitmap = (HBITMAP)LoadImageW(nullptr, (wchar_t*)filename,
IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
if (!hBitmap) {
return nullptr;
}
HDC hDC = CreateCompatibleDC(nullptr);
int width;
int height;
GetBitmapSize(hBitmap, width, height);
auto pDIBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
if (!pDIBitmap->Create(width, height, FXDIB_Rgb)) {
DeleteDC(hDC);
return nullptr;
}
ByteString info = GetBitmapInfo(pDIBitmap);
int ret = GetDIBits(hDC, hBitmap, 0, height, pDIBitmap->GetBuffer(),
(BITMAPINFO*)info.c_str(), DIB_RGB_COLORS);
DeleteDC(hDC);
if (!ret)
return nullptr;
return pDIBitmap;
}
RetainPtr<CFX_DIBitmap> CFX_WindowsDIB::LoadFromFile(const char* filename) {
return LoadFromFile(WideString::FromLocal(filename).c_str());
}
RetainPtr<CFX_DIBitmap> CFX_WindowsDIB::LoadDIBitmap(WINDIB_Open_Args_ args) {
CWin32Platform* pPlatform =
(CWin32Platform*)CFX_GEModule::Get()->GetPlatformData();
if (pPlatform->m_GdiplusExt.IsAvailable()) {
return pPlatform->m_GdiplusExt.LoadDIBitmap(args);
}
if (args.flags == WINDIB_OPEN_MEMORY) {
return nullptr;
}
HBITMAP hBitmap = (HBITMAP)LoadImageW(nullptr, (wchar_t*)args.path_name,
IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
if (!hBitmap) {
return nullptr;
}
HDC hDC = CreateCompatibleDC(nullptr);
int width, height;
GetBitmapSize(hBitmap, width, height);
auto pDIBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
if (!pDIBitmap->Create(width, height, FXDIB_Rgb)) {
DeleteDC(hDC);
return nullptr;
}
ByteString info = GetBitmapInfo(pDIBitmap);
int ret = GetDIBits(hDC, hBitmap, 0, height, pDIBitmap->GetBuffer(),
(BITMAPINFO*)info.c_str(), DIB_RGB_COLORS);
DeleteDC(hDC);
if (!ret)
return nullptr;
return pDIBitmap;
}
CFX_WindowsDIB::CFX_WindowsDIB(HDC hDC, int width, int height) {
Create(width, height, FXDIB_Rgb, (uint8_t*)1);
BITMAPINFOHEADER bmih;
memset(&bmih, 0, sizeof bmih);
bmih.biSize = sizeof bmih;
bmih.biBitCount = 24;
bmih.biHeight = -height;
bmih.biPlanes = 1;
bmih.biWidth = width;
LPVOID pData = nullptr;
m_hBitmap = CreateDIBSection(hDC, (BITMAPINFO*)&bmih, DIB_RGB_COLORS, &pData,
nullptr, 0);
m_pBuffer.Reset(static_cast<uint8_t*>(pData));
m_hMemDC = CreateCompatibleDC(hDC);
m_hOldBitmap = (HBITMAP)SelectObject(m_hMemDC, m_hBitmap);
}
CFX_WindowsDIB::~CFX_WindowsDIB() {
SelectObject(m_hMemDC, m_hOldBitmap);
DeleteDC(m_hMemDC);
DeleteObject(m_hBitmap);
}
void CFX_WindowsDIB::LoadFromDevice(HDC hDC, int left, int top) {
::BitBlt(m_hMemDC, 0, 0, m_Width, m_Height, hDC, left, top, SRCCOPY);
}
void CFX_WindowsDIB::SetToDevice(HDC hDC, int left, int top) {
::BitBlt(hDC, left, top, m_Width, m_Height, m_hMemDC, 0, 0, SRCCOPY);
}
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