void CFX_PathGenerator::ArcTo(FX_FLOAT x,
FX_FLOAT y,
FX_FLOAT width,
FX_FLOAT height,
FX_FLOAT start_angle,
FX_FLOAT sweep_angle) {
FX_FLOAT x0 = FXSYS_cos(sweep_angle / 2);
FX_FLOAT y0 = FXSYS_sin(sweep_angle / 2);
FX_FLOAT tx = FXSYS_Div((1.0f - x0) * 4, 3 * 1.0f);
FX_FLOAT ty = y0 - FXSYS_Div(FXSYS_Mul(tx, x0), y0);
FX_FLOAT px[3], py[3];
px[0] = x0 + tx;
py[0] = -ty;
px[1] = x0 + tx;
py[1] = ty;
FX_FLOAT sn = FXSYS_sin(start_angle + sweep_angle / 2);
FX_FLOAT cs = FXSYS_cos(start_angle + sweep_angle / 2);
int old_count = m_pPathData->GetPointCount();
m_pPathData->AddPointCount(3);
FX_FLOAT bezier_x, bezier_y;
bezier_x = x + FXSYS_Mul(width, FXSYS_Mul(px[0], cs) - FXSYS_Mul(py[0], sn));
bezier_y = y + FXSYS_Mul(height, FXSYS_Mul(px[0], sn) + FXSYS_Mul(py[0], cs));
m_pPathData->SetPoint(old_count, bezier_x, bezier_y, FXPT_BEZIERTO);
bezier_x = x + FXSYS_Mul(width, FXSYS_Mul(px[1], cs) - FXSYS_Mul(py[1], sn));
bezier_y = y + FXSYS_Mul(height, FXSYS_Mul(px[1], sn) + FXSYS_Mul(py[1], cs));
m_pPathData->SetPoint(old_count + 1, bezier_x, bezier_y, FXPT_BEZIERTO);
bezier_x = x + FXSYS_Mul(width, FXSYS_cos(start_angle + sweep_angle)),
bezier_y = y + FXSYS_Mul(height, FXSYS_sin(start_angle + sweep_angle));
m_pPathData->SetPoint(old_count + 2, bezier_x, bezier_y, FXPT_BEZIERTO);
}
void CPDF_Page::GetDisplayMatrix(CFX_Matrix& matrix,
int xPos,
int yPos,
int xSize,
int ySize,
int iRotate) const {
if (m_PageWidth == 0 || m_PageHeight == 0) {
return;
}
CFX_Matrix display_matrix;
int x0, y0, x1, y1, x2, y2;
iRotate %= 4;
switch (iRotate) {
case 0:
x0 = xPos;
y0 = yPos + ySize;
x1 = xPos;
y1 = yPos;
x2 = xPos + xSize;
y2 = yPos + ySize;
break;
case 1:
x0 = xPos;
y0 = yPos;
x1 = xPos + xSize;
y1 = yPos;
x2 = xPos;
y2 = yPos + ySize;
break;
case 2:
x0 = xPos + xSize;
y0 = yPos;
x1 = xPos + xSize;
y1 = yPos + ySize;
x2 = xPos;
y2 = yPos;
break;
case 3:
x0 = xPos + xSize;
y0 = yPos + ySize;
x1 = xPos;
y1 = yPos + ySize;
x2 = xPos + xSize;
y2 = yPos;
break;
}
display_matrix.Set(FXSYS_Div((FX_FLOAT)(x2 - x0), m_PageWidth),
FXSYS_Div((FX_FLOAT)(y2 - y0), m_PageWidth),
FXSYS_Div((FX_FLOAT)(x1 - x0), m_PageHeight),
FXSYS_Div((FX_FLOAT)(y1 - y0), m_PageHeight), (FX_FLOAT)x0,
(FX_FLOAT)y0);
matrix = m_PageMatrix;
matrix.Concat(display_matrix);
}
void CPDF_ReflowedPage::GetDisplayMatrix(CFX_AffineMatrix& matrix, FX_INT32 xPos, FX_INT32 yPos, FX_INT32 xSize, FX_INT32 ySize, FX_INT32 iRotate, const CFX_AffineMatrix* pPageMatrix)
{
CFX_AffineMatrix display_matrix;
if(m_PageHeight == 0) {
matrix.Set(1, 0, 0, -1, 0, 0);
return;
}
FX_INT32 x0, y0, x1, y1, x2, y2;
iRotate %= 4;
switch (iRotate) {
case 0:
x0 = xPos;
y0 = yPos;
x1 = xPos;
y1 = yPos + ySize;
x2 = xPos + xSize;
y2 = yPos;
break;
case 3:
x0 = xPos;
y0 = ySize + yPos;
x1 = xPos + xSize;
y1 = yPos + ySize;
x2 = xPos;
y2 = yPos;
break;
case 2:
x0 = xSize + xPos;
y0 = ySize + yPos;
x1 = xSize + xPos ;
y1 = yPos;
x2 = xPos;
y2 = ySize + yPos;
break;
case 1:
x0 = xPos + xSize;
y0 = yPos;
x1 = xPos;
y1 = yPos;
x2 = xPos + xSize;
y2 = yPos + ySize;
break;
}
display_matrix.Set(FXSYS_Div((FX_FLOAT)(x2 - x0), m_PageWidth),
FXSYS_Div((FX_FLOAT)(y2 - y0), m_PageWidth),
FXSYS_Div((FX_FLOAT)(x1 - x0), m_PageHeight),
FXSYS_Div((FX_FLOAT)(y1 - y0), m_PageHeight),
(FX_FLOAT)(x0), (FX_FLOAT)(y0));
matrix.Set(1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f);
matrix.Concat(display_matrix);
return;
}
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);
}
static CFX_DIBitmap* Transform1bppBitmap(const CFX_DIBSource* pSrc,
const CFX_AffineMatrix* pDestMatrix) {
ASSERT(pSrc->GetFormat() == FXDIB_1bppRgb ||
pSrc->GetFormat() == FXDIB_1bppMask ||
pSrc->GetFormat() == FXDIB_1bppCmyk);
CFX_DIBExtractor src_bitmap(pSrc);
CFX_DIBitmap* pSrcBitmap = src_bitmap;
if (pSrcBitmap == NULL) {
return NULL;
}
int src_width = pSrcBitmap->GetWidth(), src_height = pSrcBitmap->GetHeight();
uint8_t* src_buf = pSrcBitmap->GetBuffer();
FX_DWORD src_pitch = pSrcBitmap->GetPitch();
FX_FLOAT dest_area = pDestMatrix->GetUnitArea();
FX_FLOAT area_scale =
FXSYS_Div((FX_FLOAT)(src_width * src_height), dest_area);
FX_FLOAT size_scale = FXSYS_sqrt(area_scale);
CFX_AffineMatrix adjusted_matrix(*pDestMatrix);
adjusted_matrix.Scale(size_scale, size_scale);
CFX_FloatRect result_rect_f = adjusted_matrix.GetUnitRect();
FX_RECT result_rect = result_rect_f.GetOutterRect();
CFX_AffineMatrix src2result;
src2result.e = adjusted_matrix.c + adjusted_matrix.e;
src2result.f = adjusted_matrix.d + adjusted_matrix.f;
src2result.a = adjusted_matrix.a / pSrcBitmap->GetWidth();
src2result.b = adjusted_matrix.b / pSrcBitmap->GetWidth();
src2result.c = -adjusted_matrix.c / pSrcBitmap->GetHeight();
src2result.d = -adjusted_matrix.d / pSrcBitmap->GetHeight();
src2result.TranslateI(-result_rect.left, -result_rect.top);
CFX_AffineMatrix result2src;
result2src.SetReverse(src2result);
CPDF_FixedMatrix result2src_fix(result2src, 8);
int result_width = result_rect.Width();
int result_height = result_rect.Height();
CFX_DIBitmap* pTempBitmap = new CFX_DIBitmap;
if (!pTempBitmap->Create(result_width, result_height, pSrc->GetFormat())) {
delete pTempBitmap;
if (pSrcBitmap != src_bitmap) {
delete pSrcBitmap;
}
return NULL;
}
pTempBitmap->CopyPalette(pSrc->GetPalette());
uint8_t* dest_buf = pTempBitmap->GetBuffer();
int dest_pitch = pTempBitmap->GetPitch();
FXSYS_memset(dest_buf, pSrc->IsAlphaMask() ? 0 : 0xff,
dest_pitch * result_height);
if (pSrcBitmap->IsAlphaMask()) {
for (int dest_y = 0; dest_y < result_height; dest_y++) {
uint8_t* dest_scan = dest_buf + dest_y * dest_pitch;
for (int dest_x = 0; dest_x < result_width; dest_x++) {
int src_x, src_y;
result2src_fix.Transform(dest_x, dest_y, src_x, src_y);
if (src_x < 0 || src_x >= src_width || src_y < 0 ||
src_y >= src_height) {
continue;
}
if (!((src_buf + src_pitch * src_y)[src_x / 8] &
(1 << (7 - src_x % 8)))) {
continue;
}
dest_scan[dest_x / 8] |= 1 << (7 - dest_x % 8);
}
}
} else {
for (int dest_y = 0; dest_y < result_height; dest_y++) {
uint8_t* dest_scan = dest_buf + dest_y * dest_pitch;
for (int dest_x = 0; dest_x < result_width; dest_x++) {
int src_x, src_y;
result2src_fix.Transform(dest_x, dest_y, src_x, src_y);
if (src_x < 0 || src_x >= src_width || src_y < 0 ||
src_y >= src_height) {
continue;
}
if ((src_buf + src_pitch * src_y)[src_x / 8] & (1 << (7 - src_x % 8))) {
continue;
}
dest_scan[dest_x / 8] &= ~(1 << (7 - dest_x % 8));
}
}
}
if (pSrcBitmap != src_bitmap) {
delete pSrcBitmap;
}
return pTempBitmap;
}
void CPDF_RenderStatus::DrawTilingPattern(CPDF_TilingPattern* pPattern,
CPDF_PageObject* pPageObj,
const CFX_Matrix* pObj2Device,
FX_BOOL bStroke) {
if (!pPattern->Load()) {
return;
}
m_pDevice->SaveState();
if (pPageObj->m_Type == PDFPAGE_PATH) {
if (!SelectClipPath((CPDF_PathObject*)pPageObj, pObj2Device, bStroke)) {
m_pDevice->RestoreState();
return;
}
} else if (pPageObj->m_Type == PDFPAGE_IMAGE) {
FX_RECT rect = pPageObj->GetBBox(pObj2Device);
m_pDevice->SetClip_Rect(&rect);
} else {
return;
}
FX_RECT clip_box = m_pDevice->GetClipBox();
if (clip_box.IsEmpty()) {
m_pDevice->RestoreState();
return;
}
CFX_Matrix dCTM = m_pDevice->GetCTM();
FX_FLOAT sa = FXSYS_fabs(dCTM.a);
FX_FLOAT sd = FXSYS_fabs(dCTM.d);
clip_box.right = clip_box.left + (int32_t)FXSYS_ceil(clip_box.Width() * sa);
clip_box.bottom = clip_box.top + (int32_t)FXSYS_ceil(clip_box.Height() * sd);
CFX_Matrix mtPattern2Device = pPattern->m_Pattern2Form;
mtPattern2Device.Concat(*pObj2Device);
GetScaledMatrix(mtPattern2Device);
FX_BOOL bAligned = FALSE;
if (pPattern->m_BBox.left == 0 && pPattern->m_BBox.bottom == 0 &&
pPattern->m_BBox.right == pPattern->m_XStep &&
pPattern->m_BBox.top == pPattern->m_YStep &&
(mtPattern2Device.IsScaled() || mtPattern2Device.Is90Rotated())) {
bAligned = TRUE;
}
CFX_FloatRect cell_bbox = pPattern->m_BBox;
mtPattern2Device.TransformRect(cell_bbox);
int width = (int)FXSYS_ceil(cell_bbox.Width());
int height = (int)FXSYS_ceil(cell_bbox.Height());
if (width == 0) {
width = 1;
}
if (height == 0) {
height = 1;
}
int min_col, max_col, min_row, max_row;
CFX_Matrix mtDevice2Pattern;
mtDevice2Pattern.SetReverse(mtPattern2Device);
CFX_FloatRect clip_box_p(clip_box);
clip_box_p.Transform(&mtDevice2Pattern);
min_col = (int)FXSYS_ceil(
FXSYS_Div(clip_box_p.left - pPattern->m_BBox.right, pPattern->m_XStep));
max_col = (int)FXSYS_floor(
FXSYS_Div(clip_box_p.right - pPattern->m_BBox.left, pPattern->m_XStep));
min_row = (int)FXSYS_ceil(
FXSYS_Div(clip_box_p.bottom - pPattern->m_BBox.top, pPattern->m_YStep));
max_row = (int)FXSYS_floor(
FXSYS_Div(clip_box_p.top - pPattern->m_BBox.bottom, pPattern->m_YStep));
if (width > clip_box.Width() || height > clip_box.Height() ||
width * height > clip_box.Width() * clip_box.Height()) {
CPDF_GraphicStates* pStates = NULL;
if (!pPattern->m_bColored) {
pStates = CloneObjStates(pPageObj, bStroke);
}
CPDF_Dictionary* pFormResource = NULL;
if (pPattern->m_pForm->m_pFormDict) {
pFormResource = pPattern->m_pForm->m_pFormDict->GetDict("Resources");
}
for (int col = min_col; col <= max_col; col++)
for (int row = min_row; row <= max_row; row++) {
FX_FLOAT orig_x, orig_y;
orig_x = col * pPattern->m_XStep;
orig_y = row * pPattern->m_YStep;
mtPattern2Device.Transform(orig_x, orig_y);
CFX_Matrix matrix = *pObj2Device;
matrix.Translate(orig_x - mtPattern2Device.e,
orig_y - mtPattern2Device.f);
m_pDevice->SaveState();
CPDF_RenderStatus status;
status.Initialize(m_pContext, m_pDevice, NULL, NULL, this, pStates,
&m_Options, pPattern->m_pForm->m_Transparency,
m_bDropObjects, pFormResource);
status.RenderObjectList(pPattern->m_pForm, &matrix);
m_pDevice->RestoreState();
}
m_pDevice->RestoreState();
delete pStates;
return;
}
if (bAligned) {
int orig_x = FXSYS_round(mtPattern2Device.e);
int orig_y = FXSYS_round(mtPattern2Device.f);
min_col = (clip_box.left - orig_x) / width;
if (clip_box.left < orig_x) {
min_col--;
}
max_col = (clip_box.right - orig_x) / width;
if (clip_box.right <= orig_x) {
max_col--;
}
min_row = (clip_box.top - orig_y) / height;
if (clip_box.top < orig_y) {
min_row--;
}
max_row = (clip_box.bottom - orig_y) / height;
if (clip_box.bottom <= orig_y) {
max_row--;
}
}
FX_FLOAT left_offset = cell_bbox.left - mtPattern2Device.e;
FX_FLOAT top_offset = cell_bbox.bottom - mtPattern2Device.f;
CFX_DIBitmap* pPatternBitmap = NULL;
if (width * height < 16) {
CFX_DIBitmap* pEnlargedBitmap =
DrawPatternBitmap(m_pContext->m_pDocument, m_pContext->m_pPageCache,
pPattern, pObj2Device, 8, 8, m_Options.m_Flags);
pPatternBitmap = pEnlargedBitmap->StretchTo(width, height);
delete pEnlargedBitmap;
} else {
pPatternBitmap = DrawPatternBitmap(
m_pContext->m_pDocument, m_pContext->m_pPageCache, pPattern,
pObj2Device, width, height, m_Options.m_Flags);
}
if (!pPatternBitmap) {
m_pDevice->RestoreState();
return;
}
if (m_Options.m_ColorMode == RENDER_COLOR_GRAY) {
pPatternBitmap->ConvertColorScale(m_Options.m_ForeColor,
m_Options.m_BackColor);
}
FX_ARGB fill_argb = GetFillArgb(pPageObj);
int clip_width = clip_box.right - clip_box.left;
int clip_height = clip_box.bottom - clip_box.top;
CFX_DIBitmap screen;
if (!screen.Create(clip_width, clip_height, FXDIB_Argb)) {
return;
}
screen.Clear(0);
FX_DWORD* src_buf = (FX_DWORD*)pPatternBitmap->GetBuffer();
for (int col = min_col; col <= max_col; col++) {
for (int row = min_row; row <= max_row; row++) {
int start_x, start_y;
if (bAligned) {
start_x = FXSYS_round(mtPattern2Device.e) + col * width - clip_box.left;
start_y = FXSYS_round(mtPattern2Device.f) + row * height - clip_box.top;
} else {
FX_FLOAT orig_x = col * pPattern->m_XStep;
FX_FLOAT orig_y = row * pPattern->m_YStep;
mtPattern2Device.Transform(orig_x, orig_y);
start_x = FXSYS_round(orig_x + left_offset) - clip_box.left;
start_y = FXSYS_round(orig_y + top_offset) - clip_box.top;
}
if (width == 1 && height == 1) {
if (start_x < 0 || start_x >= clip_box.Width() || start_y < 0 ||
start_y >= clip_box.Height()) {
continue;
}
FX_DWORD* dest_buf =
(FX_DWORD*)(screen.GetBuffer() + screen.GetPitch() * start_y +
start_x * 4);
if (pPattern->m_bColored) {
*dest_buf = *src_buf;
} else {
*dest_buf = (*(uint8_t*)src_buf << 24) | (fill_argb & 0xffffff);
}
} else {
if (pPattern->m_bColored) {
screen.CompositeBitmap(start_x, start_y, width, height,
pPatternBitmap, 0, 0);
} else {
screen.CompositeMask(start_x, start_y, width, height, pPatternBitmap,
fill_argb, 0, 0);
}
}
}
}
CompositeDIBitmap(&screen, clip_box.left, clip_box.top, 0, 255,
FXDIB_BLEND_NORMAL, FALSE);
m_pDevice->RestoreState();
delete pPatternBitmap;
}
static void DrawAxialShading(CFX_DIBitmap* pBitmap,
CFX_Matrix* pObject2Bitmap,
CPDF_Dictionary* pDict,
CPDF_Function** pFuncs,
int nFuncs,
CPDF_ColorSpace* pCS,
int alpha) {
ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
CPDF_Array* pCoords = pDict->GetArray("Coords");
if (!pCoords) {
return;
}
FX_FLOAT start_x = pCoords->GetNumber(0);
FX_FLOAT start_y = pCoords->GetNumber(1);
FX_FLOAT end_x = pCoords->GetNumber(2);
FX_FLOAT end_y = pCoords->GetNumber(3);
FX_FLOAT t_min = 0, t_max = 1.0f;
CPDF_Array* pArray = pDict->GetArray("Domain");
if (pArray) {
t_min = pArray->GetNumber(0);
t_max = pArray->GetNumber(1);
}
FX_BOOL bStartExtend = FALSE, bEndExtend = FALSE;
pArray = pDict->GetArray("Extend");
if (pArray) {
bStartExtend = pArray->GetInteger(0);
bEndExtend = pArray->GetInteger(1);
}
int width = pBitmap->GetWidth();
int height = pBitmap->GetHeight();
FX_FLOAT x_span = end_x - start_x;
FX_FLOAT y_span = end_y - start_y;
FX_FLOAT axis_len_square =
FXSYS_Mul(x_span, x_span) + FXSYS_Mul(y_span, y_span);
CFX_Matrix matrix;
matrix.SetReverse(*pObject2Bitmap);
int total_results = 0;
for (int j = 0; j < nFuncs; j++) {
if (pFuncs[j]) {
total_results += pFuncs[j]->CountOutputs();
}
}
if (pCS->CountComponents() > total_results) {
total_results = pCS->CountComponents();
}
CFX_FixedBufGrow<FX_FLOAT, 16> result_array(total_results);
FX_FLOAT* pResults = result_array;
FXSYS_memset(pResults, 0, total_results * sizeof(FX_FLOAT));
FX_DWORD rgb_array[SHADING_STEPS];
for (int i = 0; i < SHADING_STEPS; i++) {
FX_FLOAT input = (t_max - t_min) * i / SHADING_STEPS + t_min;
int offset = 0;
for (int j = 0; j < nFuncs; j++) {
if (pFuncs[j]) {
int nresults = 0;
if (pFuncs[j]->Call(&input, 1, pResults + offset, nresults)) {
offset += nresults;
}
}
}
FX_FLOAT R = 0.0f, G = 0.0f, B = 0.0f;
pCS->GetRGB(pResults, R, G, B);
rgb_array[i] =
FXARGB_TODIB(FXARGB_MAKE(alpha, FXSYS_round(R * 255),
FXSYS_round(G * 255), FXSYS_round(B * 255)));
}
int pitch = pBitmap->GetPitch();
for (int row = 0; row < height; row++) {
FX_DWORD* dib_buf = (FX_DWORD*)(pBitmap->GetBuffer() + row * pitch);
for (int column = 0; column < width; column++) {
FX_FLOAT x = (FX_FLOAT)column, y = (FX_FLOAT)row;
matrix.Transform(x, y);
FX_FLOAT scale = FXSYS_Div(
FXSYS_Mul(x - start_x, x_span) + FXSYS_Mul(y - start_y, y_span),
axis_len_square);
int index = (int32_t)(scale * (SHADING_STEPS - 1));
if (index < 0) {
if (!bStartExtend) {
continue;
}
index = 0;
} else if (index >= SHADING_STEPS) {
if (!bEndExtend) {
continue;
}
index = SHADING_STEPS - 1;
}
dib_buf[column] = rgb_array[index];
}
}
}
static void DrawRadialShading(CFX_DIBitmap* pBitmap,
CFX_Matrix* pObject2Bitmap,
CPDF_Dictionary* pDict,
CPDF_Function** pFuncs,
int nFuncs,
CPDF_ColorSpace* pCS,
int alpha) {
ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
CPDF_Array* pCoords = pDict->GetArray("Coords");
if (!pCoords) {
return;
}
FX_FLOAT start_x = pCoords->GetNumber(0);
FX_FLOAT start_y = pCoords->GetNumber(1);
FX_FLOAT start_r = pCoords->GetNumber(2);
FX_FLOAT end_x = pCoords->GetNumber(3);
FX_FLOAT end_y = pCoords->GetNumber(4);
FX_FLOAT end_r = pCoords->GetNumber(5);
CFX_Matrix matrix;
matrix.SetReverse(*pObject2Bitmap);
FX_FLOAT t_min = 0, t_max = 1.0f;
CPDF_Array* pArray = pDict->GetArray("Domain");
if (pArray) {
t_min = pArray->GetNumber(0);
t_max = pArray->GetNumber(1);
}
FX_BOOL bStartExtend = FALSE, bEndExtend = FALSE;
pArray = pDict->GetArray("Extend");
if (pArray) {
bStartExtend = pArray->GetInteger(0);
bEndExtend = pArray->GetInteger(1);
}
int total_results = 0;
for (int j = 0; j < nFuncs; j++) {
if (pFuncs[j]) {
total_results += pFuncs[j]->CountOutputs();
}
}
if (pCS->CountComponents() > total_results) {
total_results = pCS->CountComponents();
}
CFX_FixedBufGrow<FX_FLOAT, 16> result_array(total_results);
FX_FLOAT* pResults = result_array;
FXSYS_memset(pResults, 0, total_results * sizeof(FX_FLOAT));
FX_DWORD rgb_array[SHADING_STEPS];
for (int i = 0; i < SHADING_STEPS; i++) {
FX_FLOAT input = (t_max - t_min) * i / SHADING_STEPS + t_min;
int offset = 0;
for (int j = 0; j < nFuncs; j++) {
if (pFuncs[j]) {
int nresults;
if (pFuncs[j]->Call(&input, 1, pResults + offset, nresults)) {
offset += nresults;
}
}
}
FX_FLOAT R = 0.0f, G = 0.0f, B = 0.0f;
pCS->GetRGB(pResults, R, G, B);
rgb_array[i] =
FXARGB_TODIB(FXARGB_MAKE(alpha, FXSYS_round(R * 255),
FXSYS_round(G * 255), FXSYS_round(B * 255)));
}
FX_FLOAT a = FXSYS_Mul(start_x - end_x, start_x - end_x) +
FXSYS_Mul(start_y - end_y, start_y - end_y) -
FXSYS_Mul(start_r - end_r, start_r - end_r);
int width = pBitmap->GetWidth();
int height = pBitmap->GetHeight();
int pitch = pBitmap->GetPitch();
FX_BOOL bDecreasing = FALSE;
if (start_r > end_r) {
int length = (int)FXSYS_sqrt((FXSYS_Mul(start_x - end_x, start_x - end_x) +
FXSYS_Mul(start_y - end_y, start_y - end_y)));
if (length < start_r - end_r) {
bDecreasing = TRUE;
}
}
for (int row = 0; row < height; row++) {
FX_DWORD* dib_buf = (FX_DWORD*)(pBitmap->GetBuffer() + row * pitch);
for (int column = 0; column < width; column++) {
FX_FLOAT x = (FX_FLOAT)column, y = (FX_FLOAT)row;
matrix.Transform(x, y);
FX_FLOAT b = -2 * (FXSYS_Mul(x - start_x, end_x - start_x) +
FXSYS_Mul(y - start_y, end_y - start_y) +
FXSYS_Mul(start_r, end_r - start_r));
FX_FLOAT c = FXSYS_Mul(x - start_x, x - start_x) +
FXSYS_Mul(y - start_y, y - start_y) -
FXSYS_Mul(start_r, start_r);
FX_FLOAT s;
if (a == 0) {
s = FXSYS_Div(-c, b);
} else {
FX_FLOAT b2_4ac = FXSYS_Mul(b, b) - 4 * FXSYS_Mul(a, c);
if (b2_4ac < 0) {
continue;
}
FX_FLOAT root = FXSYS_sqrt(b2_4ac);
FX_FLOAT s1, s2;
if (a > 0) {
s1 = FXSYS_Div(-b - root, 2 * a);
s2 = FXSYS_Div(-b + root, 2 * a);
} else {
s2 = FXSYS_Div(-b - root, 2 * a);
s1 = FXSYS_Div(-b + root, 2 * a);
}
if (bDecreasing) {
if (s1 >= 0 || bStartExtend) {
s = s1;
} else {
s = s2;
}
} else {
if (s2 <= 1.0f || bEndExtend) {
s = s2;
} else {
s = s1;
}
}
if ((start_r + s * (end_r - start_r)) < 0) {
continue;
}
}
int index = (int32_t)(s * (SHADING_STEPS - 1));
if (index < 0) {
if (!bStartExtend) {
continue;
}
index = 0;
}
if (index >= SHADING_STEPS) {
if (!bEndExtend) {
continue;
}
index = SHADING_STEPS - 1;
}
dib_buf[column] = rgb_array[index];
}
}
}
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;
}
}
}
void CWeightTable::Calc(int dest_len, int dest_min, int dest_max, int src_len, int src_min, int src_max, int flags)
{
if (m_pWeightTables) {
FX_Free(m_pWeightTables);
m_pWeightTables = NULL;
}
double scale, base;
scale = FXSYS_Div((FX_FLOAT)(src_len), (FX_FLOAT)(dest_len));
if (dest_len < 0) {
base = (FX_FLOAT)(src_len);
} else {
base = 0;
}
int ext_size = flags & FXDIB_BICUBIC_INTERPOL ? 3 : 1;
m_ItemSize = sizeof(int) * 2 + (int)(sizeof(int) * (FXSYS_ceil(FXSYS_fabs((FX_FLOAT)scale)) + ext_size));
m_DestMin = dest_min;
if ((dest_max - dest_min) > (int)((1U << 30) - 4) / m_ItemSize) {
return;
}
m_pWeightTables = FX_AllocNL(FX_BYTE, (dest_max - dest_min) * m_ItemSize + 4);
if (m_pWeightTables == NULL) {
return;
}
if ((flags & FXDIB_NOSMOOTH) != 0 || FXSYS_fabs((FX_FLOAT)scale) < 1.0f) {
for (int dest_pixel = dest_min; dest_pixel < dest_max; dest_pixel ++) {
PixelWeight& pixel_weights = *GetPixelWeight(dest_pixel);
double src_pos = dest_pixel * scale + scale / 2 + base;
if (flags & FXDIB_INTERPOL) {
pixel_weights.m_SrcStart = (int)FXSYS_floor((FX_FLOAT)src_pos - 1.0f / 2);
pixel_weights.m_SrcEnd = (int)FXSYS_floor((FX_FLOAT)src_pos + 1.0f / 2);
if (pixel_weights.m_SrcStart < src_min) {
pixel_weights.m_SrcStart = src_min;
}
if (pixel_weights.m_SrcEnd >= src_max) {
pixel_weights.m_SrcEnd = src_max - 1;
}
if (pixel_weights.m_SrcStart == pixel_weights.m_SrcEnd) {
pixel_weights.m_Weights[0] = 65536;
} else {
pixel_weights.m_Weights[1] = FXSYS_round((FX_FLOAT)(src_pos - pixel_weights.m_SrcStart - 1.0f / 2) * 65536);
pixel_weights.m_Weights[0] = 65536 - pixel_weights.m_Weights[1];
}
} else if (flags & FXDIB_BICUBIC_INTERPOL) {
pixel_weights.m_SrcStart = (int)FXSYS_floor((FX_FLOAT)src_pos - 1.0f / 2);
pixel_weights.m_SrcEnd = (int)FXSYS_floor((FX_FLOAT)src_pos + 1.0f / 2);
int start = pixel_weights.m_SrcStart - 1;
int end = pixel_weights.m_SrcEnd + 1;
if (start < src_min) {
start = src_min;
}
if (end >= src_max) {
end = src_max - 1;
}
if (pixel_weights.m_SrcStart < src_min) {
src_pos += src_min - pixel_weights.m_SrcStart;
pixel_weights.m_SrcStart = src_min;
}
if (pixel_weights.m_SrcEnd >= src_max) {
pixel_weights.m_SrcEnd = src_max - 1;
}
int weight;
weight = FXSYS_round((FX_FLOAT)(src_pos - pixel_weights.m_SrcStart - 1.0f / 2) * 256);
if (start == end) {
pixel_weights.m_Weights[0] = (SDP_Table[256 + weight] + SDP_Table[weight] + SDP_Table[256 - weight] + SDP_Table[512 - weight]) << 8;
} else if ((start == pixel_weights.m_SrcStart && (pixel_weights.m_SrcStart == pixel_weights.m_SrcEnd ||
end == pixel_weights.m_SrcEnd) && start < end) || (start < pixel_weights.m_SrcStart && pixel_weights.m_SrcStart == pixel_weights.m_SrcEnd && end == pixel_weights.m_SrcEnd)) {
if (start < pixel_weights.m_SrcStart) {
pixel_weights.m_Weights[0] = SDP_Table[256 + weight] << 8;
pixel_weights.m_Weights[1] = (SDP_Table[weight] + SDP_Table[256 - weight] + SDP_Table[512 - weight]) << 8;
} else {
if (pixel_weights.m_SrcStart == pixel_weights.m_SrcEnd) {
pixel_weights.m_Weights[0] = (SDP_Table[256 + weight] + SDP_Table[weight] + SDP_Table[256 - weight]) << 8;
pixel_weights.m_Weights[1] = SDP_Table[512 - weight] << 8;
} else {
pixel_weights.m_Weights[0] = (SDP_Table[256 + weight] + SDP_Table[weight]) << 8;
pixel_weights.m_Weights[1] = (SDP_Table[256 - weight] + SDP_Table[512 - weight]) << 8;
}
}
if (pixel_weights.m_SrcStart == pixel_weights.m_SrcEnd) {
pixel_weights.m_SrcEnd = end;
}
if (start < pixel_weights.m_SrcStart) {
pixel_weights.m_SrcStart = start;
}
} else if (start == pixel_weights.m_SrcStart &&
start < pixel_weights.m_SrcEnd &&
pixel_weights.m_SrcEnd < end) {
pixel_weights.m_Weights[0] = (SDP_Table[256 + weight] + SDP_Table[weight]) << 8;
pixel_weights.m_Weights[1] = SDP_Table[256 - weight] << 8;
pixel_weights.m_Weights[2] = SDP_Table[512 - weight] << 8;
pixel_weights.m_SrcEnd = end;
} else if (start < pixel_weights.m_SrcStart &&
pixel_weights.m_SrcStart < pixel_weights.m_SrcEnd &&
pixel_weights.m_SrcEnd == end) {
pixel_weights.m_Weights[0] = SDP_Table[256 + weight] << 8;
pixel_weights.m_Weights[1] = SDP_Table[weight] << 8;
pixel_weights.m_Weights[2] = (SDP_Table[256 - weight] + SDP_Table[512 - weight]) << 8;
pixel_weights.m_SrcStart = start;
} else {
pixel_weights.m_Weights[0] = SDP_Table[256 + weight] << 8;
pixel_weights.m_Weights[1] = SDP_Table[weight] << 8;
pixel_weights.m_Weights[2] = SDP_Table[256 - weight] << 8;
pixel_weights.m_Weights[3] = SDP_Table[512 - weight] << 8;
pixel_weights.m_SrcStart = start;
pixel_weights.m_SrcEnd = end;
}
} else {
pixel_weights.m_SrcStart = pixel_weights.m_SrcEnd = (int)FXSYS_floor((FX_FLOAT)src_pos);
if (pixel_weights.m_SrcStart < src_min) {
pixel_weights.m_SrcStart = src_min;
}
if (pixel_weights.m_SrcEnd >= src_max) {
pixel_weights.m_SrcEnd = src_max - 1;
}
pixel_weights.m_Weights[0] = 65536;
}
}
return;
}
for (int dest_pixel = dest_min; dest_pixel < dest_max; dest_pixel ++) {
PixelWeight& pixel_weights = *GetPixelWeight(dest_pixel);
double src_start = dest_pixel * scale + base;
double src_end = src_start + scale;
int start_i, end_i;
if (src_start < src_end) {
start_i = (int)FXSYS_floor((FX_FLOAT)src_start);
end_i = (int)FXSYS_ceil((FX_FLOAT)src_end);
} else {
start_i = (int)FXSYS_floor((FX_FLOAT)src_end);
end_i = (int)FXSYS_ceil((FX_FLOAT)src_start);
}
if (start_i < src_min) {
start_i = src_min;
}
if (end_i >= src_max) {
end_i = src_max - 1;
}
if (start_i > end_i) {
if (start_i >= src_max) {
start_i = src_max - 1;
}
pixel_weights.m_SrcStart = start_i;
pixel_weights.m_SrcEnd = start_i;
continue;
}
pixel_weights.m_SrcStart = start_i;
pixel_weights.m_SrcEnd = end_i;
for (int j = start_i; j <= end_i; j ++) {
double dest_start = FXSYS_Div((FX_FLOAT)(j) - base, scale);
double dest_end = FXSYS_Div((FX_FLOAT)(j + 1) - base, scale);
if (dest_start > dest_end) {
double temp = dest_start;
dest_start = dest_end;
dest_end = temp;
}
double area_start = dest_start > (FX_FLOAT)(dest_pixel) ? dest_start : (FX_FLOAT)(dest_pixel);
double area_end = dest_end > (FX_FLOAT)(dest_pixel + 1) ? (FX_FLOAT)(dest_pixel + 1) : dest_end;
double weight = area_start >= area_end ? 0.0f : area_end - area_start;
if (weight == 0 && j == end_i) {
pixel_weights.m_SrcEnd --;
break;
}
pixel_weights.m_Weights[j - start_i] = FXSYS_round((FX_FLOAT)(weight * 65536));
}
}
}
