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// Copyright 2020 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 "core/fxge/win32/cgdi_device_driver.h"
#include <algorithm>
#include <vector>
#include "core/fxcrt/fx_string.h"
#include "core/fxge/cfx_fillrenderoptions.h"
#include "core/fxge/cfx_graphstatedata.h"
#include "core/fxge/cfx_pathdata.h"
#include "core/fxge/render_defines.h"
#include "core/fxge/win32/cfx_windowsdib.h"
#include "core/fxge/win32/cwin32_platform.h"
#include "third_party/base/notreached.h"
#if !defined(_SKIA_SUPPORT_)
#include "core/fxge/agg/fx_agg_driver.h"
#include "third_party/agg23/agg_clip_liang_barsky.h"
#endif
namespace {
constexpr int FillTypeToGdiFillType(CFX_FillRenderOptions::FillType fill_type) {
return static_cast<int>(fill_type);
}
static_assert(FillTypeToGdiFillType(
CFX_FillRenderOptions::FillType::kEvenOdd) == ALTERNATE,
"CFX_FillRenderOptions::FillType::kEvenOdd value mismatch");
static_assert(
FillTypeToGdiFillType(CFX_FillRenderOptions::FillType::kWinding) == WINDING,
"CFX_FillRenderOptions::FillType::kWinding value mismatch");
HPEN CreateExtPen(const CFX_GraphStateData* pGraphState,
const CFX_Matrix* pMatrix,
uint32_t argb) {
ASSERT(pGraphState);
float scale = 1.0f;
if (pMatrix) {
scale = fabs(pMatrix->a) > fabs(pMatrix->b) ? fabs(pMatrix->a)
: fabs(pMatrix->b);
}
float width = std::max(scale * pGraphState->m_LineWidth, 1.0f);
uint32_t PenStyle = PS_GEOMETRIC;
if (!pGraphState->m_DashArray.empty())
PenStyle |= PS_USERSTYLE;
else
PenStyle |= PS_SOLID;
switch (pGraphState->m_LineCap) {
case CFX_GraphStateData::LineCapButt:
PenStyle |= PS_ENDCAP_FLAT;
break;
case CFX_GraphStateData::LineCapRound:
PenStyle |= PS_ENDCAP_ROUND;
break;
case CFX_GraphStateData::LineCapSquare:
PenStyle |= PS_ENDCAP_SQUARE;
break;
}
switch (pGraphState->m_LineJoin) {
case CFX_GraphStateData::LineJoinMiter:
PenStyle |= PS_JOIN_MITER;
break;
case CFX_GraphStateData::LineJoinRound:
PenStyle |= PS_JOIN_ROUND;
break;
case CFX_GraphStateData::LineJoinBevel:
PenStyle |= PS_JOIN_BEVEL;
break;
}
FX_COLORREF colorref = ArgbToColorRef(argb);
LOGBRUSH lb;
lb.lbColor = colorref;
lb.lbStyle = BS_SOLID;
lb.lbHatch = 0;
std::vector<uint32_t> dashes;
if (!pGraphState->m_DashArray.empty()) {
dashes.resize(pGraphState->m_DashArray.size());
for (size_t i = 0; i < pGraphState->m_DashArray.size(); i++) {
dashes[i] = FXSYS_roundf(
pMatrix ? pMatrix->TransformDistance(pGraphState->m_DashArray[i])
: pGraphState->m_DashArray[i]);
dashes[i] = std::max(dashes[i], 1U);
}
}
return ExtCreatePen(PenStyle, (DWORD)ceil(width), &lb,
pGraphState->m_DashArray.size(),
reinterpret_cast<const DWORD*>(dashes.data()));
}
HBRUSH CreateBrush(uint32_t argb) {
return CreateSolidBrush(ArgbToColorRef(argb));
}
void SetPathToDC(HDC hDC,
const CFX_PathData* pPathData,
const CFX_Matrix* pMatrix) {
BeginPath(hDC);
pdfium::span<const FX_PATHPOINT> points = pPathData->GetPoints();
for (size_t i = 0; i < points.size(); ++i) {
CFX_PointF pos = points[i].m_Point;
if (pMatrix)
pos = pMatrix->Transform(pos);
CFX_Point screen(FXSYS_roundf(pos.x), FXSYS_roundf(pos.y));
FXPT_TYPE point_type = points[i].m_Type;
if (point_type == FXPT_TYPE::MoveTo) {
MoveToEx(hDC, screen.x, screen.y, nullptr);
} else if (point_type == FXPT_TYPE::LineTo) {
if (points[i].m_Point == points[i - 1].m_Point)
screen.x++;
LineTo(hDC, screen.x, screen.y);
} else if (point_type == FXPT_TYPE::BezierTo) {
POINT lppt[3];
lppt[0].x = screen.x;
lppt[0].y = screen.y;
pos = points[i + 1].m_Point;
if (pMatrix)
pos = pMatrix->Transform(pos);
lppt[1].x = FXSYS_roundf(pos.x);
lppt[1].y = FXSYS_roundf(pos.y);
pos = points[i + 2].m_Point;
if (pMatrix)
pos = pMatrix->Transform(pos);
lppt[2].x = FXSYS_roundf(pos.x);
lppt[2].y = FXSYS_roundf(pos.y);
PolyBezierTo(hDC, lppt, 3);
i += 2;
}
if (points[i].m_CloseFigure)
CloseFigure(hDC);
}
EndPath(hDC);
}
#if defined(_SKIA_SUPPORT_)
// TODO(caryclark) This antigrain function is duplicated here to permit
// removing the last remaining dependency. Eventually, this will be elminiated
// altogether and replace by Skia code.
struct rect_base {
float x1;
float y1;
float x2;
float y2;
};
unsigned clip_liang_barsky(float x1,
float y1,
float x2,
float y2,
const rect_base& clip_box,
float* x,
float* y) {
const float nearzero = 1e-30f;
float deltax = x2 - x1;
float deltay = y2 - y1;
unsigned np = 0;
if (deltax == 0)
deltax = (x1 > clip_box.x1) ? -nearzero : nearzero;
float xin, xout;
if (deltax > 0) {
xin = clip_box.x1;
xout = clip_box.x2;
} else {
xin = clip_box.x2;
xout = clip_box.x1;
}
float tinx = (xin - x1) / deltax;
if (deltay == 0)
deltay = (y1 > clip_box.y1) ? -nearzero : nearzero;
float yin, yout;
if (deltay > 0) {
yin = clip_box.y1;
yout = clip_box.y2;
} else {
yin = clip_box.y2;
yout = clip_box.y1;
}
float tiny = (yin - y1) / deltay;
float tin1, tin2;
if (tinx < tiny) {
tin1 = tinx;
tin2 = tiny;
} else {
tin1 = tiny;
tin2 = tinx;
}
if (tin1 <= 1.0f) {
if (0 < tin1) {
*x++ = xin;
*y++ = yin;
++np;
}
if (tin2 <= 1.0f) {
float toutx = (xout - x1) / deltax;
float touty = (yout - y1) / deltay;
float tout1 = (toutx < touty) ? toutx : touty;
if (tin2 > 0 || tout1 > 0) {
if (tin2 <= tout1) {
if (tin2 > 0) {
if (tinx > tiny) {
*x++ = xin;
*y++ = y1 + (deltay * tinx);
} else {
*x++ = x1 + (deltax * tiny);
*y++ = yin;
}
++np;
}
if (tout1 < 1.0f) {
if (toutx < touty) {
*x++ = xout;
*y++ = y1 + (deltay * toutx);
} else {
*x++ = x1 + (deltax * touty);
*y++ = yout;
}
} else {
*x++ = x2;
*y++ = y2;
}
++np;
} else {
if (tinx > tiny) {
*x++ = xin;
*y++ = yout;
} else {
*x++ = xout;
*y++ = yin;
}
++np;
}
}
}
}
return np;
}
#endif // defined(_SKIA_SUPPORT_)
} // namespace
CGdiDeviceDriver::CGdiDeviceDriver(HDC hDC, DeviceType device_type)
: m_hDC(hDC), m_DeviceType(device_type) {
auto* pPlatform =
static_cast<CWin32Platform*>(CFX_GEModule::Get()->GetPlatform());
SetStretchBltMode(m_hDC, pPlatform->m_bHalfTone ? HALFTONE : COLORONCOLOR);
DWORD obj_type = GetObjectType(m_hDC);
m_bMetafileDCType = obj_type == OBJ_ENHMETADC || obj_type == OBJ_ENHMETAFILE;
if (obj_type == OBJ_MEMDC) {
HBITMAP hBitmap = CreateBitmap(1, 1, 1, 1, nullptr);
hBitmap = (HBITMAP)SelectObject(m_hDC, hBitmap);
BITMAP bitmap;
GetObject(hBitmap, sizeof bitmap, &bitmap);
m_nBitsPerPixel = bitmap.bmBitsPixel;
m_Width = bitmap.bmWidth;
m_Height = abs(bitmap.bmHeight);
hBitmap = (HBITMAP)SelectObject(m_hDC, hBitmap);
DeleteObject(hBitmap);
} else {
m_nBitsPerPixel = ::GetDeviceCaps(m_hDC, BITSPIXEL);
m_Width = ::GetDeviceCaps(m_hDC, HORZRES);
m_Height = ::GetDeviceCaps(m_hDC, VERTRES);
}
if (m_DeviceType != DeviceType::kDisplay) {
m_RenderCaps = FXRC_BIT_MASK;
} else {
m_RenderCaps = FXRC_GET_BITS | FXRC_BIT_MASK;
}
}
CGdiDeviceDriver::~CGdiDeviceDriver() = default;
DeviceType CGdiDeviceDriver::GetDeviceType() const {
return m_DeviceType;
}
int CGdiDeviceDriver::GetDeviceCaps(int caps_id) const {
switch (caps_id) {
case FXDC_PIXEL_WIDTH:
return m_Width;
case FXDC_PIXEL_HEIGHT:
return m_Height;
case FXDC_BITS_PIXEL:
return m_nBitsPerPixel;
case FXDC_RENDER_CAPS:
return m_RenderCaps;
default:
NOTREACHED();
return 0;
}
}
void CGdiDeviceDriver::SaveState() {
SaveDC(m_hDC);
}
void CGdiDeviceDriver::RestoreState(bool bKeepSaved) {
RestoreDC(m_hDC, -1);
if (bKeepSaved)
SaveDC(m_hDC);
}
bool CGdiDeviceDriver::GDI_SetDIBits(const RetainPtr<CFX_DIBitmap>& pBitmap1,
const FX_RECT& src_rect,
int left,
int top) {
if (m_DeviceType == DeviceType::kPrinter) {
RetainPtr<CFX_DIBitmap> pBitmap = pBitmap1->FlipImage(false, true);
if (!pBitmap)
return false;
LPBYTE pBuffer = pBitmap->GetBuffer();
ByteString info = CFX_WindowsDIB::GetBitmapInfo(pBitmap);
((BITMAPINFOHEADER*)info.c_str())->biHeight *= -1;
FX_RECT dst_rect(0, 0, src_rect.Width(), src_rect.Height());
dst_rect.Intersect(0, 0, pBitmap->GetWidth(), pBitmap->GetHeight());
int dst_width = dst_rect.Width();
int dst_height = dst_rect.Height();
::StretchDIBits(m_hDC, left, top, dst_width, dst_height, 0, 0, dst_width,
dst_height, pBuffer, (BITMAPINFO*)info.c_str(),
DIB_RGB_COLORS, SRCCOPY);
return true;
}
RetainPtr<CFX_DIBitmap> pBitmap = pBitmap1;
LPBYTE pBuffer = pBitmap->GetBuffer();
ByteString info = CFX_WindowsDIB::GetBitmapInfo(pBitmap);
::SetDIBitsToDevice(m_hDC, left, top, src_rect.Width(), src_rect.Height(),
src_rect.left, pBitmap->GetHeight() - src_rect.bottom, 0,
pBitmap->GetHeight(), pBuffer, (BITMAPINFO*)info.c_str(),
DIB_RGB_COLORS);
return true;
}
bool CGdiDeviceDriver::GDI_StretchDIBits(
const RetainPtr<CFX_DIBitmap>& pBitmap1,
int dest_left,
int dest_top,
int dest_width,
int dest_height,
const FXDIB_ResampleOptions& options) {
RetainPtr<CFX_DIBitmap> pBitmap = pBitmap1;
if (!pBitmap || dest_width == 0 || dest_height == 0)
return false;
ByteString info = CFX_WindowsDIB::GetBitmapInfo(pBitmap);
if ((int64_t)abs(dest_width) * abs(dest_height) <
(int64_t)pBitmap1->GetWidth() * pBitmap1->GetHeight() * 4 ||
options.bInterpolateBilinear) {
SetStretchBltMode(m_hDC, HALFTONE);
} else {
SetStretchBltMode(m_hDC, COLORONCOLOR);
}
RetainPtr<CFX_DIBitmap> pToStrechBitmap = pBitmap;
if (m_DeviceType == DeviceType::kPrinter &&
((int64_t)pBitmap->GetWidth() * pBitmap->GetHeight() >
(int64_t)abs(dest_width) * abs(dest_height))) {
pToStrechBitmap = pBitmap->StretchTo(dest_width, dest_height,
FXDIB_ResampleOptions(), nullptr);
}
ByteString toStrechBitmapInfo =
CFX_WindowsDIB::GetBitmapInfo(pToStrechBitmap);
::StretchDIBits(m_hDC, dest_left, dest_top, dest_width, dest_height, 0, 0,
pToStrechBitmap->GetWidth(), pToStrechBitmap->GetHeight(),
pToStrechBitmap->GetBuffer(),
(BITMAPINFO*)toStrechBitmapInfo.c_str(), DIB_RGB_COLORS,
SRCCOPY);
return true;
}
bool CGdiDeviceDriver::GDI_StretchBitMask(
const RetainPtr<CFX_DIBitmap>& pBitmap1,
int dest_left,
int dest_top,
int dest_width,
int dest_height,
uint32_t bitmap_color) {
RetainPtr<CFX_DIBitmap> pBitmap = pBitmap1;
if (!pBitmap || dest_width == 0 || dest_height == 0)
return false;
int width = pBitmap->GetWidth(), height = pBitmap->GetHeight();
struct {
BITMAPINFOHEADER bmiHeader;
uint32_t bmiColors[2];
} bmi;
memset(&bmi.bmiHeader, 0, sizeof(BITMAPINFOHEADER));
bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
bmi.bmiHeader.biBitCount = 1;
bmi.bmiHeader.biCompression = BI_RGB;
bmi.bmiHeader.biHeight = -height;
bmi.bmiHeader.biPlanes = 1;
bmi.bmiHeader.biWidth = width;
if (m_nBitsPerPixel != 1) {
SetStretchBltMode(m_hDC, HALFTONE);
}
bmi.bmiColors[0] = 0xffffff;
bmi.bmiColors[1] = 0;
HBRUSH hPattern = CreateBrush(bitmap_color);
HBRUSH hOld = (HBRUSH)SelectObject(m_hDC, hPattern);
// In PDF, when image mask is 1, use device bitmap; when mask is 0, use brush
// bitmap.
// A complete list of the boolen operations is as follows:
/* P(bitmap_color) S(ImageMask) D(DeviceBitmap) Result
* 0 0 0 0
* 0 0 1 0
* 0 1 0 0
* 0 1 1 1
* 1 0 0 1
* 1 0 1 1
* 1 1 0 0
* 1 1 1 1
*/
// The boolen codes is B8. Based on
// http://msdn.microsoft.com/en-us/library/aa932106.aspx, the ROP3 code is
// 0xB8074A
::StretchDIBits(m_hDC, dest_left, dest_top, dest_width, dest_height, 0, 0,
width, height, pBitmap->GetBuffer(), (BITMAPINFO*)&bmi,
DIB_RGB_COLORS, 0xB8074A);
SelectObject(m_hDC, hOld);
DeleteObject(hPattern);
return true;
}
bool CGdiDeviceDriver::GetClipBox(FX_RECT* pRect) {
return !!(::GetClipBox(m_hDC, (RECT*)pRect));
}
void CGdiDeviceDriver::DrawLine(float x1, float y1, float x2, float y2) {
if (!m_bMetafileDCType) { // EMF drawing is not bound to the DC.
int startOutOfBoundsFlag = (x1 < 0) | ((x1 > m_Width) << 1) |
((y1 < 0) << 2) | ((y1 > m_Height) << 3);
int endOutOfBoundsFlag = (x2 < 0) | ((x2 > m_Width) << 1) |
((y2 < 0) << 2) | ((y2 > m_Height) << 3);
if (startOutOfBoundsFlag & endOutOfBoundsFlag)
return;
if (startOutOfBoundsFlag || endOutOfBoundsFlag) {
float x[2];
float y[2];
int np;
#if defined(_SKIA_SUPPORT_)
// TODO(caryclark) temporary replacement of antigrain in line function
// to permit removing antigrain altogether
rect_base rect = {0.0f, 0.0f, (float)(m_Width), (float)(m_Height)};
np = clip_liang_barsky(x1, y1, x2, y2, rect, x, y);
#else
pdfium::agg::rect_base<float> rect(0.0f, 0.0f, (float)(m_Width),
(float)(m_Height));
np = pdfium::agg::clip_liang_barsky<float>(x1, y1, x2, y2, rect, x, y);
#endif
if (np == 0)
return;
if (np == 1) {
x2 = x[0];
y2 = y[0];
} else {
ASSERT(np == 2);
x1 = x[0];
y1 = y[0];
x2 = x[1];
y2 = y[1];
}
}
}
MoveToEx(m_hDC, FXSYS_roundf(x1), FXSYS_roundf(y1), nullptr);
LineTo(m_hDC, FXSYS_roundf(x2), FXSYS_roundf(y2));
}
bool CGdiDeviceDriver::DrawPath(const CFX_PathData* pPathData,
const CFX_Matrix* pMatrix,
const CFX_GraphStateData* pGraphState,
uint32_t fill_color,
uint32_t stroke_color,
const CFX_FillRenderOptions& fill_options,
BlendMode blend_type) {
if (blend_type != BlendMode::kNormal)
return false;
auto* pPlatform =
static_cast<CWin32Platform*>(CFX_GEModule::Get()->GetPlatform());
if (!(pGraphState || stroke_color == 0) &&
!pPlatform->m_GdiplusExt.IsAvailable()) {
CFX_FloatRect bbox_f = pPathData->GetBoundingBox();
if (pMatrix)
bbox_f = pMatrix->TransformRect(bbox_f);
FX_RECT bbox = bbox_f.GetInnerRect();
if (bbox.Width() <= 0) {
return DrawCosmeticLine(CFX_PointF(bbox.left, bbox.top),
CFX_PointF(bbox.left, bbox.bottom + 1),
fill_color, BlendMode::kNormal);
}
if (bbox.Height() <= 0) {
return DrawCosmeticLine(CFX_PointF(bbox.left, bbox.top),
CFX_PointF(bbox.right + 1, bbox.top), fill_color,
BlendMode::kNormal);
}
}
int fill_alpha = FXARGB_A(fill_color);
int stroke_alpha = FXARGB_A(stroke_color);
bool bDrawAlpha = (fill_alpha > 0 && fill_alpha < 255) ||
(stroke_alpha > 0 && stroke_alpha < 255 && pGraphState);
if (!pPlatform->m_GdiplusExt.IsAvailable() && bDrawAlpha)
return false;
if (pPlatform->m_GdiplusExt.IsAvailable()) {
if (bDrawAlpha ||
((m_DeviceType != DeviceType::kPrinter && !fill_options.full_cover) ||
(pGraphState && !pGraphState->m_DashArray.empty()))) {
if (!((!pMatrix || !pMatrix->WillScale()) && pGraphState &&
pGraphState->m_LineWidth == 1.0f &&
(pPathData->GetPoints().size() == 5 ||
pPathData->GetPoints().size() == 4) &&
pPathData->IsRect())) {
if (pPlatform->m_GdiplusExt.DrawPath(m_hDC, pPathData, pMatrix,
pGraphState, fill_color,
stroke_color, fill_options)) {
return true;
}
}
}
}
const bool fill =
fill_options.fill_type != CFX_FillRenderOptions::FillType::kNoFill;
HPEN hPen = nullptr;
HBRUSH hBrush = nullptr;
if (pGraphState && stroke_alpha) {
SetMiterLimit(m_hDC, pGraphState->m_MiterLimit, nullptr);
hPen = CreateExtPen(pGraphState, pMatrix, stroke_color);
hPen = (HPEN)SelectObject(m_hDC, hPen);
}
if (fill && fill_alpha) {
SetPolyFillMode(m_hDC, FillTypeToGdiFillType(fill_options.fill_type));
hBrush = CreateBrush(fill_color);
hBrush = (HBRUSH)SelectObject(m_hDC, hBrush);
}
if (pPathData->GetPoints().size() == 2 && pGraphState &&
!pGraphState->m_DashArray.empty()) {
CFX_PointF pos1 = pPathData->GetPoint(0);
CFX_PointF pos2 = pPathData->GetPoint(1);
if (pMatrix) {
pos1 = pMatrix->Transform(pos1);
pos2 = pMatrix->Transform(pos2);
}
DrawLine(pos1.x, pos1.y, pos2.x, pos2.y);
} else {
SetPathToDC(m_hDC, pPathData, pMatrix);
if (pGraphState && stroke_alpha) {
if (fill && fill_alpha) {
if (fill_options.text_mode) {
StrokeAndFillPath(m_hDC);
} else {
FillPath(m_hDC);
SetPathToDC(m_hDC, pPathData, pMatrix);
StrokePath(m_hDC);
}
} else {
StrokePath(m_hDC);
}
} else if (fill && fill_alpha) {
FillPath(m_hDC);
}
}
if (hPen) {
hPen = (HPEN)SelectObject(m_hDC, hPen);
DeleteObject(hPen);
}
if (hBrush) {
hBrush = (HBRUSH)SelectObject(m_hDC, hBrush);
DeleteObject(hBrush);
}
return true;
}
bool CGdiDeviceDriver::FillRectWithBlend(const FX_RECT& rect,
uint32_t fill_color,
BlendMode blend_type) {
if (blend_type != BlendMode::kNormal)
return false;
int alpha;
FX_COLORREF colorref;
std::tie(alpha, colorref) = ArgbToAlphaAndColorRef(fill_color);
if (alpha == 0)
return true;
if (alpha < 255)
return false;
HBRUSH hBrush = CreateSolidBrush(colorref);
const RECT* pRect = reinterpret_cast<const RECT*>(&rect);
::FillRect(m_hDC, pRect, hBrush);
DeleteObject(hBrush);
return true;
}
void CGdiDeviceDriver::SetBaseClip(const FX_RECT& rect) {
m_BaseClipBox = rect;
}
bool CGdiDeviceDriver::SetClip_PathFill(
const CFX_PathData* pPathData,
const CFX_Matrix* pMatrix,
const CFX_FillRenderOptions& fill_options) {
if (pPathData->GetPoints().size() == 5) {
Optional<CFX_FloatRect> maybe_rectf = pPathData->GetRect(pMatrix);
if (maybe_rectf.has_value()) {
FX_RECT rect = maybe_rectf.value().GetOuterRect();
// Can easily apply base clip to protect against wildly large rectangular
// clips. crbug.com/1019026
if (m_BaseClipBox.has_value())
rect.Intersect(m_BaseClipBox.value());
return IntersectClipRect(m_hDC, rect.left, rect.top, rect.right,
rect.bottom) != ERROR;
}
}
SetPathToDC(m_hDC, pPathData, pMatrix);
SetPolyFillMode(m_hDC, FillTypeToGdiFillType(fill_options.fill_type));
SelectClipPath(m_hDC, RGN_AND);
return true;
}
bool CGdiDeviceDriver::SetClip_PathStroke(
const CFX_PathData* pPathData,
const CFX_Matrix* pMatrix,
const CFX_GraphStateData* pGraphState) {
HPEN hPen = CreateExtPen(pGraphState, pMatrix, 0xff000000);
hPen = (HPEN)SelectObject(m_hDC, hPen);
SetPathToDC(m_hDC, pPathData, pMatrix);
WidenPath(m_hDC);
SetPolyFillMode(m_hDC, WINDING);
bool ret = !!SelectClipPath(m_hDC, RGN_AND);
hPen = (HPEN)SelectObject(m_hDC, hPen);
DeleteObject(hPen);
return ret;
}
bool CGdiDeviceDriver::DrawCosmeticLine(const CFX_PointF& ptMoveTo,
const CFX_PointF& ptLineTo,
uint32_t color,
BlendMode blend_type) {
if (blend_type != BlendMode::kNormal)
return false;
int alpha;
FX_COLORREF colorref;
std::tie(alpha, colorref) = ArgbToAlphaAndColorRef(color);
if (alpha == 0)
return true;
HPEN hPen = CreatePen(PS_SOLID, 1, colorref);
hPen = (HPEN)SelectObject(m_hDC, hPen);
MoveToEx(m_hDC, FXSYS_roundf(ptMoveTo.x), FXSYS_roundf(ptMoveTo.y), nullptr);
LineTo(m_hDC, FXSYS_roundf(ptLineTo.x), FXSYS_roundf(ptLineTo.y));
hPen = (HPEN)SelectObject(m_hDC, hPen);
DeleteObject(hPen);
return true;
}