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;
}
static void _UpdateLineEndPoints(CFX_FloatRect& rect,
FX_FLOAT start_x,
FX_FLOAT start_y,
FX_FLOAT end_x,
FX_FLOAT end_y,
FX_FLOAT hw) {
if (start_x == end_x) {
if (start_y == end_y) {
rect.UpdateRect(end_x + hw, end_y + hw);
rect.UpdateRect(end_x - hw, end_y - hw);
return;
}
FX_FLOAT point_y;
if (end_y < start_y) {
point_y = end_y - hw;
} else {
point_y = end_y + hw;
}
rect.UpdateRect(end_x + hw, point_y);
rect.UpdateRect(end_x - hw, point_y);
return;
}
if (start_y == end_y) {
FX_FLOAT point_x;
if (end_x < start_x) {
point_x = end_x - hw;
} else {
point_x = end_x + hw;
}
rect.UpdateRect(point_x, end_y + hw);
rect.UpdateRect(point_x, end_y - hw);
return;
}
FX_FLOAT dx = end_x - start_x;
FX_FLOAT dy = end_y - start_y;
FX_FLOAT ll = FXSYS_sqrt2(dx, dy);
FX_FLOAT mx = end_x + hw * dx / ll;
FX_FLOAT my = end_y + hw * dy / ll;
FX_FLOAT dx1 = hw * dy / ll;
FX_FLOAT dy1 = hw * dx / ll;
rect.UpdateRect(mx - dx1, my + dy1);
rect.UpdateRect(mx + dx1, my - dy1);
}
static void _UpdateLineJoinPoints(CFX_FloatRect& rect,
FX_FLOAT start_x,
FX_FLOAT start_y,
FX_FLOAT middle_x,
FX_FLOAT middle_y,
FX_FLOAT end_x,
FX_FLOAT end_y,
FX_FLOAT half_width,
FX_FLOAT miter_limit) {
FX_FLOAT start_k = 0, start_c = 0, end_k = 0, end_c = 0, start_len = 0,
start_dc = 0, end_len = 0, end_dc = 0;
FX_BOOL bStartVert = FXSYS_fabs(start_x - middle_x) < 1.0f / 20;
FX_BOOL bEndVert = FXSYS_fabs(middle_x - end_x) < 1.0f / 20;
if (bStartVert && bEndVert) {
int start_dir = middle_y > start_y ? 1 : -1;
FX_FLOAT point_y = middle_y + half_width * start_dir;
rect.UpdateRect(middle_x + half_width, point_y);
rect.UpdateRect(middle_x - half_width, point_y);
return;
}
if (!bStartVert) {
start_k = FXSYS_Div(middle_y - start_y, middle_x - start_x);
start_c = middle_y - FXSYS_Mul(start_k, middle_x);
start_len = FXSYS_sqrt2(start_x - middle_x, start_y - middle_y);
start_dc = (FX_FLOAT)FXSYS_fabs(
FXSYS_MulDiv(half_width, start_len, start_x - middle_x));
}
if (!bEndVert) {
end_k = FXSYS_Div(end_y - middle_y, end_x - middle_x);
end_c = middle_y - FXSYS_Mul(end_k, middle_x);
end_len = FXSYS_sqrt2(end_x - middle_x, end_y - middle_y);
end_dc = (FX_FLOAT)FXSYS_fabs(
FXSYS_MulDiv(half_width, end_len, end_x - middle_x));
}
if (bStartVert) {
FX_FLOAT outside_x = start_x;
if (end_x < start_x) {
outside_x += half_width;
} else {
outside_x -= half_width;
}
FX_FLOAT outside_y;
if (start_y < FXSYS_Mul(end_k, start_x) + end_c) {
outside_y = FXSYS_Mul(end_k, outside_x) + end_c + end_dc;
} else {
outside_y = FXSYS_Mul(end_k, outside_x) + end_c - end_dc;
}
rect.UpdateRect(outside_x, outside_y);
return;
}
if (bEndVert) {
FX_FLOAT outside_x = end_x;
if (start_x < end_x) {
outside_x += half_width;
} else {
outside_x -= half_width;
}
FX_FLOAT outside_y;
if (end_y < FXSYS_Mul(start_k, end_x) + start_c) {
outside_y = FXSYS_Mul(start_k, outside_x) + start_c + start_dc;
} else {
outside_y = FXSYS_Mul(start_k, outside_x) + start_c - start_dc;
}
rect.UpdateRect(outside_x, outside_y);
return;
}
if (FXSYS_fabs(start_k - end_k) < 1.0f / 20) {
int start_dir = middle_x > start_x ? 1 : -1;
int end_dir = end_x > middle_x ? 1 : -1;
if (start_dir == end_dir) {
_UpdateLineEndPoints(rect, middle_x, middle_y, end_x, end_y, half_width);
} else {
_UpdateLineEndPoints(rect, start_x, start_y, middle_x, middle_y,
half_width);
}
return;
}
FX_FLOAT start_outside_c = start_c;
if (end_y < FXSYS_Mul(start_k, end_x) + start_c) {
start_outside_c += start_dc;
} else {
start_outside_c -= start_dc;
}
FX_FLOAT end_outside_c = end_c;
if (start_y < FXSYS_Mul(end_k, start_x) + end_c) {
end_outside_c += end_dc;
} else {
end_outside_c -= end_dc;
}
FX_FLOAT join_x = FXSYS_Div(end_outside_c - start_outside_c, start_k - end_k);
FX_FLOAT join_y = FXSYS_Mul(start_k, join_x) + start_outside_c;
rect.UpdateRect(join_x, join_y);
}