// 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 "xfa/fxgraphics/cfx_graphics.h" #include <memory> #include "core/fxge/cfx_fxgedevice.h" #include "core/fxge/cfx_gemodule.h" #include "core/fxge/cfx_renderdevice.h" #include "core/fxge/cfx_unicodeencoding.h" #include "third_party/base/ptr_util.h" #include "xfa/fxgraphics/cfx_color.h" #include "xfa/fxgraphics/cfx_path.h" #include "xfa/fxgraphics/cfx_pattern.h" #include "xfa/fxgraphics/cfx_shading.h" namespace { enum { FX_CONTEXT_None = 0, FX_CONTEXT_Device, }; #define FX_HATCHSTYLE_Total 53 struct FX_HATCHDATA { int32_t width; int32_t height; uint8_t maskBits[64]; }; const FX_HATCHDATA hatchBitmapData[FX_HATCHSTYLE_Total] = { {16, // Horizontal 16, { 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, }}, {16, // Vertical 16, { 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, }}, {16, // ForwardDiagonal 16, { 0x80, 0x80, 0x00, 0x00, 0x40, 0x40, 0x00, 0x00, 0x20, 0x20, 0x00, 0x00, 0x10, 0x10, 0x00, 0x00, 0x08, 0x08, 0x00, 0x00, 0x04, 0x04, 0x00, 0x00, 0x02, 0x02, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x40, 0x40, 0x00, 0x00, 0x20, 0x20, 0x00, 0x00, 0x10, 0x10, 0x00, 0x00, 0x08, 0x08, 0x00, 0x00, 0x04, 0x04, 0x00, 0x00, 0x02, 0x02, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, }}, {16, // BackwardDiagonal 16, { 0x01, 0x01, 0x00, 0x00, 0x02, 0x02, 0x00, 0x00, 0x04, 0x04, 0x00, 0x00, 0x08, 0x08, 0x00, 0x00, 0x10, 0x10, 0x00, 0x00, 0x20, 0x20, 0x00, 0x00, 0x40, 0x40, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x02, 0x02, 0x00, 0x00, 0x04, 0x04, 0x00, 0x00, 0x08, 0x08, 0x00, 0x00, 0x10, 0x10, 0x00, 0x00, 0x20, 0x20, 0x00, 0x00, 0x40, 0x40, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, }}, {16, // Cross 16, { 0xff, 0xff, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, }}, {16, // DiagonalCross 16, { 0x81, 0x81, 0x00, 0x00, 0x42, 0x42, 0x00, 0x00, 0x24, 0x24, 0x00, 0x00, 0x18, 0x18, 0x00, 0x00, 0x18, 0x18, 0x00, 0x00, 0x24, 0x24, 0x00, 0x00, 0x42, 0x42, 0x00, 0x00, 0x81, 0x81, 0x00, 0x00, 0x81, 0x81, 0x00, 0x00, 0x42, 0x42, 0x00, 0x00, 0x24, 0x24, 0x00, 0x00, 0x18, 0x18, 0x00, 0x00, 0x18, 0x18, 0x00, 0x00, 0x24, 0x24, 0x00, 0x00, 0x42, 0x42, 0x00, 0x00, 0x81, 0x81, 0x00, 0x00, }}, }; } // namespace CFX_Graphics::CFX_Graphics(CFX_RenderDevice* renderDevice) : m_type(FX_CONTEXT_None), m_renderDevice(renderDevice) { if (!renderDevice) return; m_type = FX_CONTEXT_Device; } CFX_Graphics::~CFX_Graphics() {} void CFX_Graphics::SaveGraphState() { if (m_type != FX_CONTEXT_Device || !m_renderDevice) return; m_renderDevice->SaveState(); m_infoStack.push_back(pdfium::MakeUnique<TInfo>(m_info)); } void CFX_Graphics::RestoreGraphState() { if (m_type != FX_CONTEXT_Device || !m_renderDevice) return; m_renderDevice->RestoreState(false); if (m_infoStack.empty() || !m_infoStack.back()) return; m_info = *m_infoStack.back(); m_infoStack.pop_back(); return; } void CFX_Graphics::SetLineCap(CFX_GraphStateData::LineCap lineCap) { if (m_type == FX_CONTEXT_Device && m_renderDevice) { m_info.graphState.m_LineCap = lineCap; } } void CFX_Graphics::SetLineDash(float dashPhase, float* dashArray, int32_t dashCount) { if (dashCount > 0 && !dashArray) return; dashCount = dashCount < 0 ? 0 : dashCount; if (m_type == FX_CONTEXT_Device && m_renderDevice) { float scale = 1.0; if (m_info.isActOnDash) { scale = m_info.graphState.m_LineWidth; } m_info.graphState.m_DashPhase = dashPhase; m_info.graphState.SetDashCount(dashCount); for (int32_t i = 0; i < dashCount; i++) { m_info.graphState.m_DashArray[i] = dashArray[i] * scale; } } } void CFX_Graphics::SetLineDash(FX_DashStyle dashStyle) { if (m_type == FX_CONTEXT_Device && m_renderDevice) RenderDeviceSetLineDash(dashStyle); } void CFX_Graphics::SetLineWidth(float lineWidth, bool isActOnDash) { if (m_type == FX_CONTEXT_Device && m_renderDevice) { m_info.graphState.m_LineWidth = lineWidth; m_info.isActOnDash = isActOnDash; } } void CFX_Graphics::SetStrokeColor(CFX_Color* color) { if (!color) return; if (m_type == FX_CONTEXT_Device && m_renderDevice) { m_info.strokeColor = color; } } void CFX_Graphics::SetFillColor(CFX_Color* color) { if (!color) return; if (m_type == FX_CONTEXT_Device && m_renderDevice) { m_info.fillColor = color; } } void CFX_Graphics::StrokePath(CFX_Path* path, CFX_Matrix* matrix) { if (!path) return; if (m_type == FX_CONTEXT_Device && m_renderDevice) RenderDeviceStrokePath(path, matrix); } void CFX_Graphics::FillPath(CFX_Path* path, FX_FillMode fillMode, CFX_Matrix* matrix) { if (!path) return; if (m_type == FX_CONTEXT_Device && m_renderDevice) RenderDeviceFillPath(path, fillMode, matrix); } void CFX_Graphics::StretchImage(const CFX_RetainPtr<CFX_DIBSource>& source, const CFX_RectF& rect, CFX_Matrix* matrix) { if (!source) return; if (m_type == FX_CONTEXT_Device && m_renderDevice) RenderDeviceStretchImage(source, rect, matrix); } void CFX_Graphics::ConcatMatrix(const CFX_Matrix* matrix) { if (!matrix) return; if (m_type == FX_CONTEXT_Device && m_renderDevice) { m_info.CTM.Concat(*matrix); } } CFX_Matrix* CFX_Graphics::GetMatrix() { if (m_type == FX_CONTEXT_Device && m_renderDevice) return &m_info.CTM; return nullptr; } CFX_RectF CFX_Graphics::GetClipRect() const { if (m_type != FX_CONTEXT_Device || !m_renderDevice) return CFX_RectF(); FX_RECT r = m_renderDevice->GetClipBox(); return CFX_Rect(r.left, r.top, r.Width(), r.Height()).As<float>(); } void CFX_Graphics::SetClipRect(const CFX_RectF& rect) { if (m_type == FX_CONTEXT_Device && m_renderDevice) { m_renderDevice->SetClip_Rect( FX_RECT(FXSYS_round(rect.left), FXSYS_round(rect.top), FXSYS_round(rect.right()), FXSYS_round(rect.bottom()))); } } CFX_RenderDevice* CFX_Graphics::GetRenderDevice() { return m_renderDevice; } void CFX_Graphics::RenderDeviceSetLineDash(FX_DashStyle dashStyle) { switch (dashStyle) { case FX_DASHSTYLE_Solid: { m_info.graphState.SetDashCount(0); return; } case FX_DASHSTYLE_Dash: { float dashArray[] = {3, 1}; SetLineDash(0, dashArray, 2); return; } case FX_DASHSTYLE_Dot: { float dashArray[] = {1, 1}; SetLineDash(0, dashArray, 2); return; } case FX_DASHSTYLE_DashDot: { float dashArray[] = {3, 1, 1, 1}; SetLineDash(0, dashArray, 4); return; } case FX_DASHSTYLE_DashDotDot: { float dashArray[] = {4, 1, 2, 1, 2, 1}; SetLineDash(0, dashArray, 6); return; } default: return; } } void CFX_Graphics::RenderDeviceStrokePath(CFX_Path* path, CFX_Matrix* matrix) { if (!m_info.strokeColor) return; CFX_Matrix m(m_info.CTM.a, m_info.CTM.b, m_info.CTM.c, m_info.CTM.d, m_info.CTM.e, m_info.CTM.f); if (matrix) { m.Concat(*matrix); } switch (m_info.strokeColor->m_type) { case FX_COLOR_Solid: { m_renderDevice->DrawPath(path->GetPathData(), &m, &m_info.graphState, 0x0, m_info.strokeColor->m_info.argb, 0); return; } default: return; } } void CFX_Graphics::RenderDeviceFillPath(CFX_Path* path, FX_FillMode fillMode, CFX_Matrix* matrix) { if (!m_info.fillColor) return; CFX_Matrix m(m_info.CTM.a, m_info.CTM.b, m_info.CTM.c, m_info.CTM.d, m_info.CTM.e, m_info.CTM.f); if (matrix) { m.Concat(*matrix); } switch (m_info.fillColor->m_type) { case FX_COLOR_Solid: { m_renderDevice->DrawPath(path->GetPathData(), &m, &m_info.graphState, m_info.fillColor->m_info.argb, 0x0, fillMode); return; } case FX_COLOR_Pattern: FillPathWithPattern(path, fillMode, &m); return; case FX_COLOR_Shading: FillPathWithShading(path, fillMode, &m); return; default: return; } } void CFX_Graphics::RenderDeviceStretchImage( const CFX_RetainPtr<CFX_DIBSource>& source, const CFX_RectF& rect, CFX_Matrix* matrix) { CFX_Matrix m1(m_info.CTM.a, m_info.CTM.b, m_info.CTM.c, m_info.CTM.d, m_info.CTM.e, m_info.CTM.f); if (matrix) { m1.Concat(*matrix); } CFX_RetainPtr<CFX_DIBitmap> bmp1 = source->StretchTo((int32_t)rect.Width(), (int32_t)rect.Height()); CFX_Matrix m2(rect.Width(), 0.0, 0.0, rect.Height(), rect.left, rect.top); m2.Concat(m1); int32_t left; int32_t top; CFX_RetainPtr<CFX_DIBitmap> bmp2 = bmp1->FlipImage(false, true); CFX_RetainPtr<CFX_DIBitmap> bmp3 = bmp2->TransformTo(&m2, left, top); CFX_RectF r = GetClipRect(); CFX_RetainPtr<CFX_DIBitmap> bitmap = m_renderDevice->GetBitmap(); bitmap->CompositeBitmap(FXSYS_round(r.left), FXSYS_round(r.top), FXSYS_round(r.Width()), FXSYS_round(r.Height()), bmp3, FXSYS_round(r.left - left), FXSYS_round(r.top - top)); } void CFX_Graphics::FillPathWithPattern(CFX_Path* path, FX_FillMode fillMode, CFX_Matrix* matrix) { CFX_Pattern* pattern = m_info.fillColor->m_info.pattern; CFX_RetainPtr<CFX_DIBitmap> bitmap = m_renderDevice->GetBitmap(); int32_t width = bitmap->GetWidth(); int32_t height = bitmap->GetHeight(); auto bmp = pdfium::MakeRetain<CFX_DIBitmap>(); bmp->Create(width, height, FXDIB_Argb); m_renderDevice->GetDIBits(bmp, 0, 0); FX_HatchStyle hatchStyle = m_info.fillColor->m_info.pattern->m_hatchStyle; const FX_HATCHDATA& data = hatchBitmapData[static_cast<int>(hatchStyle)]; auto mask = pdfium::MakeRetain<CFX_DIBitmap>(); mask->Create(data.width, data.height, FXDIB_1bppMask); memcpy(mask->GetBuffer(), data.maskBits, mask->GetPitch() * data.height); CFX_FloatRect rectf = path->GetPathData()->GetBoundingBox(); if (matrix) matrix->TransformRect(rectf); FX_RECT rect(FXSYS_round(rectf.left), FXSYS_round(rectf.top), FXSYS_round(rectf.right), FXSYS_round(rectf.bottom)); CFX_FxgeDevice device; device.Attach(bmp, false, nullptr, false); device.FillRect(&rect, m_info.fillColor->m_info.pattern->m_backArgb); for (int32_t j = rect.bottom; j < rect.top; j += mask->GetHeight()) { for (int32_t i = rect.left; i < rect.right; i += mask->GetWidth()) { device.SetBitMask(mask, i, j, m_info.fillColor->m_info.pattern->m_foreArgb); } } m_renderDevice->SaveState(); m_renderDevice->SetClip_PathFill(path->GetPathData(), matrix, fillMode); SetDIBitsWithMatrix(bmp, &pattern->m_matrix); m_renderDevice->RestoreState(false); } void CFX_Graphics::FillPathWithShading(CFX_Path* path, FX_FillMode fillMode, CFX_Matrix* matrix) { CFX_RetainPtr<CFX_DIBitmap> bitmap = m_renderDevice->GetBitmap(); int32_t width = bitmap->GetWidth(); int32_t height = bitmap->GetHeight(); float start_x = m_info.fillColor->m_shading->m_beginPoint.x; float start_y = m_info.fillColor->m_shading->m_beginPoint.y; float end_x = m_info.fillColor->m_shading->m_endPoint.x; float end_y = m_info.fillColor->m_shading->m_endPoint.y; auto bmp = pdfium::MakeRetain<CFX_DIBitmap>(); bmp->Create(width, height, FXDIB_Argb); m_renderDevice->GetDIBits(bmp, 0, 0); int32_t pitch = bmp->GetPitch(); bool result = false; switch (m_info.fillColor->m_shading->m_type) { case FX_SHADING_Axial: { float x_span = end_x - start_x; float y_span = end_y - start_y; float axis_len_square = (x_span * x_span) + (y_span * y_span); for (int32_t row = 0; row < height; row++) { uint32_t* dib_buf = (uint32_t*)(bmp->GetBuffer() + row * pitch); for (int32_t column = 0; column < width; column++) { float x = (float)(column); float y = (float)(row); float scale = (((x - start_x) * x_span) + ((y - start_y) * y_span)) / axis_len_square; if (scale < 0) { if (!m_info.fillColor->m_shading->m_isExtendedBegin) { continue; } scale = 0; } else if (scale > 1.0f) { if (!m_info.fillColor->m_shading->m_isExtendedEnd) { continue; } scale = 1.0f; } int32_t index = (int32_t)(scale * (FX_SHADING_Steps - 1)); dib_buf[column] = m_info.fillColor->m_shading->m_argbArray[index]; } } result = true; break; } case FX_SHADING_Radial: { float start_r = m_info.fillColor->m_shading->m_beginRadius; float end_r = m_info.fillColor->m_shading->m_endRadius; float a = ((start_x - end_x) * (start_x - end_x)) + ((start_y - end_y) * (start_y - end_y)) - ((start_r - end_r) * (start_r - end_r)); for (int32_t row = 0; row < height; row++) { uint32_t* dib_buf = (uint32_t*)(bmp->GetBuffer() + row * pitch); for (int32_t column = 0; column < width; column++) { float x = (float)(column); float y = (float)(row); float b = -2 * (((x - start_x) * (end_x - start_x)) + ((y - start_y) * (end_y - start_y)) + (start_r * (end_r - start_r))); float c = ((x - start_x) * (x - start_x)) + ((y - start_y) * (y - start_y)) - (start_r * start_r); float s; if (a == 0) { s = -c / b; } else { float b2_4ac = (b * b) - 4 * (a * c); if (b2_4ac < 0) { continue; } float root = (sqrt(b2_4ac)); float s1, s2; if (a > 0) { s1 = (-b - root) / (2 * a); s2 = (-b + root) / (2 * a); } else { s2 = (-b - root) / (2 * a); s1 = (-b + root) / (2 * a); } if (s2 <= 1.0f || m_info.fillColor->m_shading->m_isExtendedEnd) { s = (s2); } else { s = (s1); } if ((start_r) + s * (end_r - start_r) < 0) { continue; } } if (s < 0) { if (!m_info.fillColor->m_shading->m_isExtendedBegin) { continue; } s = 0; } if (s > 1.0f) { if (!m_info.fillColor->m_shading->m_isExtendedEnd) { continue; } s = 1.0f; } int index = (int32_t)(s * (FX_SHADING_Steps - 1)); dib_buf[column] = m_info.fillColor->m_shading->m_argbArray[index]; } } result = true; break; } default: { result = false; break; } } if (result) { m_renderDevice->SaveState(); m_renderDevice->SetClip_PathFill(path->GetPathData(), matrix, fillMode); SetDIBitsWithMatrix(bmp, matrix); m_renderDevice->RestoreState(false); } } void CFX_Graphics::SetDIBitsWithMatrix( const CFX_RetainPtr<CFX_DIBSource>& source, CFX_Matrix* matrix) { if (matrix->IsIdentity()) { m_renderDevice->SetDIBits(source, 0, 0); } else { CFX_Matrix m((float)source->GetWidth(), 0, 0, (float)source->GetHeight(), 0, 0); m.Concat(*matrix); int32_t left; int32_t top; CFX_RetainPtr<CFX_DIBitmap> bmp1 = source->FlipImage(false, true); CFX_RetainPtr<CFX_DIBitmap> bmp2 = bmp1->TransformTo(&m, left, top); m_renderDevice->SetDIBits(bmp2, left, top); } } CFX_Graphics::TInfo::TInfo() : isActOnDash(false), strokeColor(nullptr), fillColor(nullptr) {} CFX_Graphics::TInfo::TInfo(const TInfo& info) : graphState(info.graphState), CTM(info.CTM), isActOnDash(info.isActOnDash), strokeColor(info.strokeColor), fillColor(info.fillColor) {} CFX_Graphics::TInfo& CFX_Graphics::TInfo::operator=(const TInfo& other) { graphState.Copy(other.graphState); CTM = other.CTM; isActOnDash = other.isActOnDash; strokeColor = other.strokeColor; fillColor = other.fillColor; return *this; }