1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
// 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, 0);
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);
}
|
