void CFX_BinaryBuf::AppendFill(FX_BYTE byte, FX_STRSIZE count)
{
ExpandBuf(count);
if (!m_pBuffer) {
return;
}
FXSYS_memset8(m_pBuffer + m_DataSize, byte, count);
m_DataSize += count;
}
int FPDFAPI_FlateOutput(void* context, unsigned char* dest_buf, unsigned int dest_size)
{
((z_stream*)context)->next_out = dest_buf;
((z_stream*)context)->avail_out = dest_size;
unsigned int pre_pos = (unsigned int)FPDFAPI_FlateGetTotalOut(context);
int ret = inflate((z_stream*)context, Z_SYNC_FLUSH);
unsigned int post_pos = (unsigned int)FPDFAPI_FlateGetTotalOut(context);
unsigned int written = post_pos - pre_pos;
if (written < dest_size) {
FXSYS_memset8(dest_buf + written, '\0', dest_size - written);
}
return ret;
}
FX_LPBYTE CCodec_RLScanlineDecoder::v_GetNextLine()
{
if (m_SrcOffset == 0) {
GetNextOperator();
} else {
if (m_bEOD) {
return NULL;
}
}
FXSYS_memset32(m_pScanline, 0, m_Pitch);
FX_DWORD col_pos = 0;
FX_BOOL eol = FALSE;
while (m_SrcOffset < m_SrcSize && !eol) {
if (m_Operator < 128) {
FX_DWORD copy_len = m_Operator + 1;
if (col_pos + copy_len >= m_dwLineBytes) {
copy_len = m_dwLineBytes - col_pos;
eol = TRUE;
}
if (copy_len >= m_SrcSize - m_SrcOffset) {
copy_len = m_SrcSize - m_SrcOffset;
m_bEOD = TRUE;
}
FXSYS_memcpy32(m_pScanline + col_pos, m_pSrcBuf + m_SrcOffset, copy_len);
col_pos += copy_len;
UpdateOperator((FX_BYTE)copy_len);
} else if (m_Operator > 128) {
int fill = 0;
if (m_SrcOffset - 1 < m_SrcSize - 1) {
fill = m_pSrcBuf[m_SrcOffset];
}
FX_DWORD duplicate_len = 257 - m_Operator;
if (col_pos + duplicate_len >= m_dwLineBytes) {
duplicate_len = m_dwLineBytes - col_pos;
eol = TRUE;
}
FXSYS_memset8(m_pScanline + col_pos, fill, duplicate_len);
col_pos += duplicate_len;
UpdateOperator((FX_BYTE)duplicate_len);
} else {
m_bEOD = TRUE;
break;
}
}
return m_pScanline;
}
CFX_DIBitmap* CFX_DIBSource::SwapXY(FX_BOOL bXFlip, FX_BOOL bYFlip, const FX_RECT* pDestClip) const
{
FX_RECT dest_clip(0, 0, m_Height, m_Width);
if (pDestClip) {
dest_clip.Intersect(*pDestClip);
}
if (dest_clip.IsEmpty()) {
return NULL;
}
CFX_DIBitmap* pTransBitmap = FX_NEW CFX_DIBitmap;
if (!pTransBitmap) {
return NULL;
}
int result_height = dest_clip.Height(), result_width = dest_clip.Width();
if (!pTransBitmap->Create(result_width, result_height, GetFormat())) {
delete pTransBitmap;
return NULL;
}
pTransBitmap->CopyPalette(m_pPalette);
int src_pitch = m_Pitch;
int dest_pitch = pTransBitmap->GetPitch();
FX_LPBYTE dest_buf = pTransBitmap->GetBuffer();
int row_start = bXFlip ? m_Height - dest_clip.right : dest_clip.left;
int row_end = bXFlip ? m_Height - dest_clip.left : dest_clip.right;
int col_start = bYFlip ? m_Width - dest_clip.bottom : dest_clip.top;
int col_end = bYFlip ? m_Width - dest_clip.top : dest_clip.bottom;
if (GetBPP() == 1) {
FXSYS_memset8(dest_buf, 0xff, dest_pitch * result_height);
for (int row = row_start; row < row_end; row ++) {
FX_LPCBYTE src_scan = GetScanline(row);
int dest_col = (bXFlip ? dest_clip.right - (row - row_start) - 1 : row) - dest_clip.left;
FX_LPBYTE dest_scan = dest_buf;
if (bYFlip) {
dest_scan += (result_height - 1) * dest_pitch;
}
int dest_step = bYFlip ? -dest_pitch : dest_pitch;
for (int col = col_start; col < col_end; col ++) {
if (!(src_scan[col / 8] & (1 << (7 - col % 8)))) {
dest_scan[dest_col / 8] &= ~(1 << (7 - dest_col % 8));
}
dest_scan += dest_step;
}
}
} else {
int nBytes = GetBPP() / 8;
int dest_step = bYFlip ? -dest_pitch : dest_pitch;
if (nBytes == 3) {
dest_step -= 2;
}
for (int row = row_start; row < row_end; row ++) {
int dest_col = (bXFlip ? dest_clip.right - (row - row_start) - 1 : row) - dest_clip.left;
FX_LPBYTE dest_scan = dest_buf + dest_col * nBytes;
if (bYFlip) {
dest_scan += (result_height - 1) * dest_pitch;
}
if (nBytes == 4) {
FX_DWORD* src_scan = (FX_DWORD*)GetScanline(row) + col_start;
for (int col = col_start; col < col_end; col ++) {
*(FX_DWORD*)dest_scan = *src_scan++;
dest_scan += dest_step;
}
} else {
FX_LPCBYTE src_scan = GetScanline(row) + col_start * nBytes;
if (nBytes == 1)
for (int col = col_start; col < col_end; col ++) {
*dest_scan = *src_scan++;
dest_scan += dest_step;
}
else
for (int col = col_start; col < col_end; col ++) {
*dest_scan++ = *src_scan++;
*dest_scan++ = *src_scan++;
*dest_scan = *src_scan++;
dest_scan += dest_step;
}
}
}
}
if (m_pAlphaMask) {
src_pitch = m_pAlphaMask->m_Pitch;
dest_pitch = pTransBitmap->m_pAlphaMask->GetPitch();
dest_buf = pTransBitmap->m_pAlphaMask->GetBuffer();
int dest_step = bYFlip ? -dest_pitch : dest_pitch;
for (int row = row_start; row < row_end; row ++) {
int dest_col = (bXFlip ? dest_clip.right - (row - row_start) - 1 : row) - dest_clip.left;
FX_LPBYTE dest_scan = dest_buf + dest_col;
if (bYFlip) {
dest_scan += (result_height - 1) * dest_pitch;
}
FX_LPCBYTE src_scan = m_pAlphaMask->GetScanline(row) + col_start;
for (int col = col_start; col < col_end; col ++) {
*dest_scan = *src_scan++;
dest_scan += dest_step;
}
}
}
return pTransBitmap;
}
CStretchEngine::CStretchEngine(IFX_ScanlineComposer* pDestBitmap, FXDIB_Format dest_format,
int dest_width, int dest_height, const FX_RECT& clip_rect,
const CFX_DIBSource* pSrcBitmap, int flags)
{
m_State = 0;
m_DestFormat = dest_format;
m_DestBpp = dest_format & 0xff;
m_SrcBpp = pSrcBitmap->GetFormat() & 0xff;
m_bHasAlpha = pSrcBitmap->GetFormat() & 0x200;
m_pSrcPalette = pSrcBitmap->GetPalette();
m_pDestBitmap = pDestBitmap;
m_DestWidth = dest_width;
m_DestHeight = dest_height;
m_pInterBuf = NULL;
m_pExtraAlphaBuf = NULL;
m_pDestMaskScanline = NULL;
m_DestClip = clip_rect;
FX_DWORD size = clip_rect.Width();
if (size && m_DestBpp > (int)(INT_MAX / size)) {
return;
}
size *= m_DestBpp;
if (size > INT_MAX - 31) {
return;
}
size += 31;
size = size / 32 * 4;
m_pDestScanline = FX_AllocNL(FX_BYTE, size);
if (m_pDestScanline == NULL) {
return;
}
if (dest_format == FXDIB_Rgb32) {
FXSYS_memset8(m_pDestScanline, 255, size);
}
m_InterPitch = (m_DestClip.Width() * m_DestBpp + 31) / 32 * 4;
m_ExtraMaskPitch = (m_DestClip.Width() * 8 + 31) / 32 * 4;
m_pInterBuf = NULL;
m_pSource = pSrcBitmap;
m_SrcWidth = pSrcBitmap->GetWidth();
m_SrcHeight = pSrcBitmap->GetHeight();
m_SrcPitch = (m_SrcWidth * m_SrcBpp + 31) / 32 * 4;
if ((flags & FXDIB_NOSMOOTH) == 0) {
FX_BOOL bInterpol = flags & FXDIB_INTERPOL || flags & FXDIB_BICUBIC_INTERPOL;
if (!bInterpol && FXSYS_abs(dest_width) != 0 && FXSYS_abs(dest_height) < m_SrcWidth * m_SrcHeight * 8 / FXSYS_abs(dest_width)) {
flags = FXDIB_INTERPOL;
}
m_Flags = flags;
} else {
m_Flags = FXDIB_NOSMOOTH;
if (flags & FXDIB_DOWNSAMPLE) {
m_Flags |= FXDIB_DOWNSAMPLE;
}
}
double scale_x = FXSYS_Div((FX_FLOAT)(m_SrcWidth), (FX_FLOAT)(m_DestWidth));
double scale_y = FXSYS_Div((FX_FLOAT)(m_SrcHeight), (FX_FLOAT)(m_DestHeight));
double base_x = m_DestWidth > 0 ? 0.0f : (FX_FLOAT)(m_DestWidth);
double base_y = m_DestHeight > 0 ? 0.0f : (FX_FLOAT)(m_DestHeight);
double src_left = FXSYS_Mul(scale_x, (FX_FLOAT)(clip_rect.left) + base_x);
double src_right = FXSYS_Mul(scale_x, (FX_FLOAT)(clip_rect.right) + base_x);
double src_top = FXSYS_Mul(scale_y, (FX_FLOAT)(clip_rect.top) + base_y);
double src_bottom = FXSYS_Mul(scale_y, (FX_FLOAT)(clip_rect.bottom) + base_y);
if (src_left > src_right) {
double temp = src_left;
src_left = src_right;
src_right = temp;
}
if (src_top > src_bottom) {
double temp = src_top;
src_top = src_bottom;
src_bottom = temp;
}
m_SrcClip.left = (int)FXSYS_floor((FX_FLOAT)src_left);
m_SrcClip.right = (int)FXSYS_ceil((FX_FLOAT)src_right);
m_SrcClip.top = (int)FXSYS_floor((FX_FLOAT)src_top);
m_SrcClip.bottom = (int)FXSYS_ceil((FX_FLOAT)src_bottom);
FX_RECT src_rect(0, 0, m_SrcWidth, m_SrcHeight);
m_SrcClip.Intersect(src_rect);
if (m_SrcBpp == 1) {
if (m_DestBpp == 8) {
m_TransMethod = 1;
} else {
m_TransMethod = 2;
}
} else if (m_SrcBpp == 8) {
if (m_DestBpp == 8) {
if (!m_bHasAlpha) {
m_TransMethod = 3;
} else {
m_TransMethod = 4;
}
} else {
if (!m_bHasAlpha) {
m_TransMethod = 5;
} else {
m_TransMethod = 6;
}
}
} else {
if (!m_bHasAlpha) {
m_TransMethod = 7;
} else {
m_TransMethod = 8;
}
}
}
