FX_BOOL CFX_ImageTransformer::Start() {
CFX_FloatRect unit_rect = m_pMatrix->GetUnitRect();
FX_RECT result_rect = unit_rect.GetClosestRect();
FX_RECT result_clip = result_rect;
if (m_pClip)
result_clip.Intersect(*m_pClip);
if (result_clip.IsEmpty())
return FALSE;
m_result = result_clip;
if (FXSYS_fabs(m_pMatrix->a) < FXSYS_fabs(m_pMatrix->b) / 20 &&
FXSYS_fabs(m_pMatrix->d) < FXSYS_fabs(m_pMatrix->c) / 20 &&
FXSYS_fabs(m_pMatrix->a) < 0.5f && FXSYS_fabs(m_pMatrix->d) < 0.5f) {
int dest_width = result_rect.Width();
int dest_height = result_rect.Height();
result_clip.Offset(-result_rect.left, -result_rect.top);
result_clip = FXDIB_SwapClipBox(result_clip, dest_width, dest_height,
m_pMatrix->c > 0, m_pMatrix->b < 0);
m_Stretcher = WrapUnique(new CFX_ImageStretcher(
&m_Storer, m_pSrc, dest_height, dest_width, result_clip, m_Flags));
m_Stretcher->Start();
m_Status = 1;
return TRUE;
}
if (FXSYS_fabs(m_pMatrix->b) < FIX16_005 &&
FXSYS_fabs(m_pMatrix->c) < FIX16_005) {
int dest_width = m_pMatrix->a > 0 ? (int)FXSYS_ceil(m_pMatrix->a)
: (int)FXSYS_floor(m_pMatrix->a);
int dest_height = m_pMatrix->d > 0 ? (int)-FXSYS_ceil(m_pMatrix->d)
: (int)-FXSYS_floor(m_pMatrix->d);
result_clip.Offset(-result_rect.left, -result_rect.top);
m_Stretcher = WrapUnique(new CFX_ImageStretcher(
&m_Storer, m_pSrc, dest_width, dest_height, result_clip, m_Flags));
m_Stretcher->Start();
m_Status = 2;
return TRUE;
}
int stretch_width = (int)FXSYS_ceil(FXSYS_sqrt2(m_pMatrix->a, m_pMatrix->b));
int stretch_height = (int)FXSYS_ceil(FXSYS_sqrt2(m_pMatrix->c, m_pMatrix->d));
CFX_Matrix stretch2dest(1.0f, 0.0f, 0.0f, -1.0f, 0.0f,
(FX_FLOAT)(stretch_height));
stretch2dest.Concat(
m_pMatrix->a / stretch_width, m_pMatrix->b / stretch_width,
m_pMatrix->c / stretch_height, m_pMatrix->d / stretch_height,
m_pMatrix->e, m_pMatrix->f);
m_dest2stretch.SetReverse(stretch2dest);
CFX_FloatRect clip_rect_f(result_clip);
clip_rect_f.Transform(&m_dest2stretch);
m_StretchClip = clip_rect_f.GetOuterRect();
m_StretchClip.Intersect(0, 0, stretch_width, stretch_height);
m_Stretcher = WrapUnique(new CFX_ImageStretcher(&m_Storer, m_pSrc,
stretch_width, stretch_height,
m_StretchClip, m_Flags));
m_Stretcher->Start();
m_Status = 3;
return TRUE;
}
FX_BOOL CFX_ImageTransformer::Start(const CFX_DIBSource* pSrc, const CFX_AffineMatrix* pDestMatrix, int flags, const FX_RECT* pDestClip)
{
m_pMatrix = (CFX_AffineMatrix*)pDestMatrix;
CFX_FloatRect unit_rect = pDestMatrix->GetUnitRect();
FX_RECT result_rect = unit_rect.GetClosestRect();
FX_RECT result_clip = result_rect;
if (pDestClip) {
result_clip.Intersect(*pDestClip);
}
if (result_clip.IsEmpty()) {
return FALSE;
}
m_ResultLeft = result_clip.left;
m_ResultTop = result_clip.top;
m_ResultWidth = result_clip.Width();
m_ResultHeight = result_clip.Height();
m_Flags = flags;
if (FXSYS_fabs(pDestMatrix->a) < FXSYS_fabs(pDestMatrix->b) / 20 &&
FXSYS_fabs(pDestMatrix->d) < FXSYS_fabs(pDestMatrix->c) / 20 &&
FXSYS_fabs(pDestMatrix->a) < 0.5f && FXSYS_fabs(pDestMatrix->d) < 0.5f) {
int dest_width = result_rect.Width();
int dest_height = result_rect.Height();
result_clip.Offset(-result_rect.left, -result_rect.top);
result_clip = _FXDIB_SwapClipBox(result_clip, dest_width, dest_height, pDestMatrix->c > 0, pDestMatrix->b < 0);
m_Stretcher.Start(&m_Storer, pSrc, dest_height, dest_width, result_clip, flags);
m_Status = 1;
return TRUE;
}
if (FXSYS_fabs(pDestMatrix->b) < FIX16_005 && FXSYS_fabs(pDestMatrix->c) < FIX16_005) {
int dest_width = pDestMatrix->a > 0 ? (int)FXSYS_ceil(pDestMatrix->a) : (int)FXSYS_floor(pDestMatrix->a);
int dest_height = pDestMatrix->d > 0 ? (int) - FXSYS_ceil(pDestMatrix->d) : (int) - FXSYS_floor(pDestMatrix->d);
result_clip.Offset(-result_rect.left, -result_rect.top);
m_Stretcher.Start(&m_Storer, pSrc, dest_width, dest_height, result_clip, flags);
m_Status = 2;
return TRUE;
}
int stretch_width = (int)FXSYS_ceil(FXSYS_sqrt2(pDestMatrix->a, pDestMatrix->b));
int stretch_height = (int)FXSYS_ceil(FXSYS_sqrt2(pDestMatrix->c, pDestMatrix->d));
CFX_AffineMatrix stretch2dest(1.0f, 0.0f, 0.0f, -1.0f, 0.0f, (FX_FLOAT)(stretch_height));
stretch2dest.Concat(pDestMatrix->a / stretch_width, pDestMatrix->b / stretch_width,
pDestMatrix->c / stretch_height, pDestMatrix->d / stretch_height, pDestMatrix->e, pDestMatrix->f);
m_dest2stretch.SetReverse(stretch2dest);
CFX_FloatRect clip_rect_f(result_clip);
clip_rect_f.Transform(&m_dest2stretch);
m_StretchClip = clip_rect_f.GetOutterRect();
m_StretchClip.Intersect(0, 0, stretch_width, stretch_height);
m_Stretcher.Start(&m_Storer, pSrc, stretch_width, stretch_height, m_StretchClip, flags);
m_Status = 3;
return TRUE;
}
