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Diffstat (limited to 'xfa/fde/fde_gedevice.cpp')
| -rw-r--r-- | xfa/fde/fde_gedevice.cpp | 573 |
1 files changed, 573 insertions, 0 deletions
diff --git a/xfa/fde/fde_gedevice.cpp b/xfa/fde/fde_gedevice.cpp new file mode 100644 index 0000000000..ab62999118 --- /dev/null +++ b/xfa/fde/fde_gedevice.cpp @@ -0,0 +1,573 @@ +// 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/fde/fde_gedevice.h" + +#include <algorithm> + +#include "xfa/fde/fde_brush.h" +#include "xfa/fde/fde_devbasic.h" +#include "xfa/fde/fde_geobject.h" +#include "xfa/fde/fde_image.h" +#include "xfa/fde/fde_pen.h" + +FX_BOOL FDE_GetStockHatchMask(int32_t iHatchStyle, CFX_DIBitmap& hatchMask) { + FDE_LPCHATCHDATA pData = FDE_DEVGetHatchData(iHatchStyle); + if (!pData) { + return FALSE; + } + hatchMask.Create(pData->iWidth, pData->iHeight, FXDIB_1bppMask); + FXSYS_memcpy(hatchMask.GetBuffer(), pData->MaskBits, + hatchMask.GetPitch() * pData->iHeight); + return TRUE; +} + +IFDE_RenderDevice* IFDE_RenderDevice::Create(CFX_DIBitmap* pBitmap, + FX_BOOL bRgbByteOrder) { + if (pBitmap == NULL) { + return NULL; + } + CFX_FxgeDevice* pDevice = new CFX_FxgeDevice; + pDevice->Attach(pBitmap, 0, bRgbByteOrder); + return new CFDE_FxgeDevice(pDevice, TRUE); +} +IFDE_RenderDevice* IFDE_RenderDevice::Create(CFX_RenderDevice* pDevice) { + return pDevice ? new CFDE_FxgeDevice(pDevice, FALSE) : nullptr; +} +CFDE_FxgeDevice::CFDE_FxgeDevice(CFX_RenderDevice* pDevice, + FX_BOOL bOwnerDevice) + : m_pDevice(pDevice), + m_bOwnerDevice(bOwnerDevice), + m_pCharPos(NULL), + m_iCharCount(0) { + FXSYS_assert(pDevice != NULL); + FX_RECT rt = m_pDevice->GetClipBox(); + m_rtClip.Set((FX_FLOAT)rt.left, (FX_FLOAT)rt.top, (FX_FLOAT)rt.Width(), + (FX_FLOAT)rt.Height()); +} +CFDE_FxgeDevice::~CFDE_FxgeDevice() { + FX_Free(m_pCharPos); + if (m_bOwnerDevice) + delete m_pDevice; +} +int32_t CFDE_FxgeDevice::GetWidth() const { + return m_pDevice->GetWidth(); +} +int32_t CFDE_FxgeDevice::GetHeight() const { + return m_pDevice->GetHeight(); +} +FDE_HDEVICESTATE CFDE_FxgeDevice::SaveState() { + m_pDevice->SaveState(); + return NULL; +} +void CFDE_FxgeDevice::RestoreState(FDE_HDEVICESTATE hState) { + m_pDevice->RestoreState(); + const FX_RECT& rt = m_pDevice->GetClipBox(); + m_rtClip.Set((FX_FLOAT)rt.left, (FX_FLOAT)rt.top, (FX_FLOAT)rt.Width(), + (FX_FLOAT)rt.Height()); +} +FX_BOOL CFDE_FxgeDevice::SetClipRect(const CFX_RectF& rtClip) { + m_rtClip = rtClip; + return m_pDevice->SetClip_Rect(FX_RECT((int32_t)FXSYS_floor(rtClip.left), + (int32_t)FXSYS_floor(rtClip.top), + (int32_t)FXSYS_ceil(rtClip.right()), + (int32_t)FXSYS_ceil(rtClip.bottom()))); +} +const CFX_RectF& CFDE_FxgeDevice::GetClipRect() { + return m_rtClip; +} +FX_BOOL CFDE_FxgeDevice::SetClipPath(const IFDE_Path* pClip) { + return FALSE; +} +IFDE_Path* CFDE_FxgeDevice::GetClipPath() const { + return NULL; +} +FX_FLOAT CFDE_FxgeDevice::GetDpiX() const { + return 96; +} +FX_FLOAT CFDE_FxgeDevice::GetDpiY() const { + return 96; +} +FX_BOOL CFDE_FxgeDevice::DrawImage(CFX_DIBSource* pDib, + const CFX_RectF* pSrcRect, + const CFX_RectF& dstRect, + const CFX_Matrix* pImgMatrix, + const CFX_Matrix* pDevMatrix) { + FXSYS_assert(pDib != NULL); + CFX_RectF srcRect; + if (pSrcRect) { + srcRect = *pSrcRect; + } else { + srcRect.Set(0, 0, (FX_FLOAT)pDib->GetWidth(), (FX_FLOAT)pDib->GetHeight()); + } + if (srcRect.IsEmpty()) { + return FALSE; + } + CFX_Matrix dib2fxdev; + if (pImgMatrix) { + dib2fxdev = *pImgMatrix; + } else { + dib2fxdev.SetIdentity(); + } + dib2fxdev.a = dstRect.width; + dib2fxdev.d = -dstRect.height; + dib2fxdev.e = dstRect.left; + dib2fxdev.f = dstRect.bottom(); + if (pDevMatrix) { + dib2fxdev.Concat(*pDevMatrix); + } + void* handle = NULL; + m_pDevice->StartDIBits(pDib, 255, 0, (const CFX_Matrix*)&dib2fxdev, 0, + handle); + while (m_pDevice->ContinueDIBits(handle, NULL)) { + } + m_pDevice->CancelDIBits(handle); + return handle != NULL; +} +FX_BOOL CFDE_FxgeDevice::DrawString(IFDE_Brush* pBrush, + IFX_Font* pFont, + const FXTEXT_CHARPOS* pCharPos, + int32_t iCount, + FX_FLOAT fFontSize, + const CFX_Matrix* pMatrix) { + FXSYS_assert(pBrush != NULL && pFont != NULL && pCharPos != NULL && + iCount > 0); + CFX_FontCache* pCache = CFX_GEModule::Get()->GetFontCache(); + CFX_Font* pFxFont = (CFX_Font*)pFont->GetDevFont(); + switch (pBrush->GetType()) { + case FDE_BRUSHTYPE_Solid: { + FX_ARGB argb = ((IFDE_SolidBrush*)pBrush)->GetColor(); + if ((pFont->GetFontStyles() & FX_FONTSTYLE_Italic) != 0 && + !pFxFont->IsItalic()) { + FXTEXT_CHARPOS* pCP = (FXTEXT_CHARPOS*)pCharPos; + FX_FLOAT* pAM; + for (int32_t i = 0; i < iCount; ++i) { + static const FX_FLOAT mc = 0.267949f; + pAM = pCP->m_AdjustMatrix; + pAM[2] = mc * pAM[0] + pAM[2]; + pAM[3] = mc * pAM[1] + pAM[3]; + pCP++; + } + } + FXTEXT_CHARPOS* pCP = (FXTEXT_CHARPOS*)pCharPos; + IFX_Font* pCurFont = NULL; + IFX_Font* pSTFont = NULL; + FXTEXT_CHARPOS* pCurCP = NULL; + int32_t iCurCount = 0; +#if _FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_ + FX_DWORD dwFontStyle = pFont->GetFontStyles(); + CFX_Font FxFont; + CFX_SubstFont SubstFxFont; + FxFont.SetSubstFont(&SubstFxFont); + SubstFxFont.m_Weight = dwFontStyle & FX_FONTSTYLE_Bold ? 700 : 400; + SubstFxFont.m_WeightCJK = SubstFxFont.m_Weight; + SubstFxFont.m_ItalicAngle = dwFontStyle & FX_FONTSTYLE_Italic ? -12 : 0; + SubstFxFont.m_bItlicCJK = !!(dwFontStyle & FX_FONTSTYLE_Italic); +#endif // _FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_ + for (int32_t i = 0; i < iCount; ++i) { + pSTFont = pFont->GetSubstFont((int32_t)pCP->m_GlyphIndex); + pCP->m_GlyphIndex &= 0x00FFFFFF; + pCP->m_bFontStyle = FALSE; + if (pCurFont != pSTFont) { + if (pCurFont != NULL) { + pFxFont = (CFX_Font*)pCurFont->GetDevFont(); +#if _FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_ + FxFont.SetFace(pFxFont->GetFace()); + m_pDevice->DrawNormalText(iCurCount, pCurCP, &FxFont, pCache, + -fFontSize, (const CFX_Matrix*)pMatrix, + argb, FXTEXT_CLEARTYPE); +#else + m_pDevice->DrawNormalText(iCurCount, pCurCP, pFxFont, pCache, + -fFontSize, (const CFX_Matrix*)pMatrix, + argb, FXTEXT_CLEARTYPE); +#endif // _FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_ + } + pCurFont = pSTFont; + pCurCP = pCP; + iCurCount = 1; + } else { + iCurCount++; + } + pCP++; + } + if (pCurFont != NULL && iCurCount) { + pFxFont = (CFX_Font*)pCurFont->GetDevFont(); +#if _FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_ + FxFont.SetFace(pFxFont->GetFace()); + FX_BOOL bRet = m_pDevice->DrawNormalText( + iCurCount, pCurCP, &FxFont, pCache, -fFontSize, + (const CFX_Matrix*)pMatrix, argb, FXTEXT_CLEARTYPE); + FxFont.SetSubstFont(nullptr); + FxFont.SetFace(nullptr); + return bRet; +#else + return m_pDevice->DrawNormalText(iCurCount, pCurCP, pFxFont, pCache, + -fFontSize, (const CFX_Matrix*)pMatrix, + argb, FXTEXT_CLEARTYPE); +#endif // _FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_ + } +#if _FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_ + FxFont.SetSubstFont(nullptr); + FxFont.SetFace(nullptr); +#endif // _FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_ + return TRUE; + } break; + default: + return FALSE; + } +} +FX_BOOL CFDE_FxgeDevice::DrawBezier(IFDE_Pen* pPen, + FX_FLOAT fPenWidth, + const CFX_PointF& pt1, + const CFX_PointF& pt2, + const CFX_PointF& pt3, + const CFX_PointF& pt4, + const CFX_Matrix* pMatrix) { + CFX_PointsF points; + points.Add(pt1); + points.Add(pt2); + points.Add(pt3); + points.Add(pt4); + CFDE_Path path; + path.AddBezier(points); + return DrawPath(pPen, fPenWidth, &path, pMatrix); +} +FX_BOOL CFDE_FxgeDevice::DrawCurve(IFDE_Pen* pPen, + FX_FLOAT fPenWidth, + const CFX_PointsF& points, + FX_BOOL bClosed, + FX_FLOAT fTension, + const CFX_Matrix* pMatrix) { + CFDE_Path path; + path.AddCurve(points, bClosed, fTension); + return DrawPath(pPen, fPenWidth, &path, pMatrix); +} +FX_BOOL CFDE_FxgeDevice::DrawEllipse(IFDE_Pen* pPen, + FX_FLOAT fPenWidth, + const CFX_RectF& rect, + const CFX_Matrix* pMatrix) { + CFDE_Path path; + path.AddEllipse(rect); + return DrawPath(pPen, fPenWidth, &path, pMatrix); +} +FX_BOOL CFDE_FxgeDevice::DrawLines(IFDE_Pen* pPen, + FX_FLOAT fPenWidth, + const CFX_PointsF& points, + const CFX_Matrix* pMatrix) { + CFDE_Path path; + path.AddLines(points); + return DrawPath(pPen, fPenWidth, &path, pMatrix); +} +FX_BOOL CFDE_FxgeDevice::DrawLine(IFDE_Pen* pPen, + FX_FLOAT fPenWidth, + const CFX_PointF& pt1, + const CFX_PointF& pt2, + const CFX_Matrix* pMatrix) { + CFDE_Path path; + path.AddLine(pt1, pt2); + return DrawPath(pPen, fPenWidth, &path, pMatrix); +} +FX_BOOL CFDE_FxgeDevice::DrawPath(IFDE_Pen* pPen, + FX_FLOAT fPenWidth, + const IFDE_Path* pPath, + const CFX_Matrix* pMatrix) { + CFDE_Path* pGePath = (CFDE_Path*)pPath; + if (pGePath == NULL) { + return FALSE; + } + CFX_GraphStateData graphState; + if (!CreatePen(pPen, fPenWidth, graphState)) { + return FALSE; + } + return m_pDevice->DrawPath(&pGePath->m_Path, (const CFX_Matrix*)pMatrix, + &graphState, 0, pPen->GetColor(), 0); +} +FX_BOOL CFDE_FxgeDevice::DrawPolygon(IFDE_Pen* pPen, + FX_FLOAT fPenWidth, + const CFX_PointsF& points, + const CFX_Matrix* pMatrix) { + CFDE_Path path; + path.AddPolygon(points); + return DrawPath(pPen, fPenWidth, &path, pMatrix); +} +FX_BOOL CFDE_FxgeDevice::DrawRectangle(IFDE_Pen* pPen, + FX_FLOAT fPenWidth, + const CFX_RectF& rect, + const CFX_Matrix* pMatrix) { + CFDE_Path path; + path.AddRectangle(rect); + return DrawPath(pPen, fPenWidth, &path, pMatrix); +} +FX_BOOL CFDE_FxgeDevice::FillClosedCurve(IFDE_Brush* pBrush, + const CFX_PointsF& points, + FX_FLOAT fTension, + const CFX_Matrix* pMatrix) { + CFDE_Path path; + path.AddCurve(points, TRUE, fTension); + return FillPath(pBrush, &path, pMatrix); +} +FX_BOOL CFDE_FxgeDevice::FillEllipse(IFDE_Brush* pBrush, + const CFX_RectF& rect, + const CFX_Matrix* pMatrix) { + CFDE_Path path; + path.AddEllipse(rect); + return FillPath(pBrush, &path, pMatrix); +} +FX_BOOL CFDE_FxgeDevice::FillPolygon(IFDE_Brush* pBrush, + const CFX_PointsF& points, + const CFX_Matrix* pMatrix) { + CFDE_Path path; + path.AddPolygon(points); + return FillPath(pBrush, &path, pMatrix); +} +FX_BOOL CFDE_FxgeDevice::FillRectangle(IFDE_Brush* pBrush, + const CFX_RectF& rect, + const CFX_Matrix* pMatrix) { + CFDE_Path path; + path.AddRectangle(rect); + return FillPath(pBrush, &path, pMatrix); +} +FX_BOOL CFDE_FxgeDevice::CreatePen(IFDE_Pen* pPen, + FX_FLOAT fPenWidth, + CFX_GraphStateData& graphState) { + if (pPen == NULL) { + return FALSE; + } + graphState.m_LineCap = (CFX_GraphStateData::LineCap)pPen->GetLineCap(); + graphState.m_LineJoin = (CFX_GraphStateData::LineJoin)pPen->GetLineJoin(); + graphState.m_LineWidth = fPenWidth; + graphState.m_MiterLimit = pPen->GetMiterLimit(); + graphState.m_DashPhase = pPen->GetDashPhase(); + CFX_FloatArray dashArray; + switch (pPen->GetDashStyle()) { + case FDE_DASHSTYLE_Dash: + dashArray.Add(3); + dashArray.Add(1); + break; + case FDE_DASHSTYLE_Dot: + dashArray.Add(1); + dashArray.Add(1); + break; + case FDE_DASHSTYLE_DashDot: + dashArray.Add(3); + dashArray.Add(1); + dashArray.Add(1); + dashArray.Add(1); + break; + case FDE_DASHSTYLE_DashDotDot: + dashArray.Add(3); + dashArray.Add(1); + dashArray.Add(1); + dashArray.Add(1); + dashArray.Add(1); + dashArray.Add(1); + break; + case FDE_DASHSTYLE_Customized: + pPen->GetDashArray(dashArray); + break; + } + int32_t iDashCount = dashArray.GetSize(); + if (iDashCount > 0) { + graphState.SetDashCount(iDashCount); + for (int32_t i = 0; i < iDashCount; ++i) { + graphState.m_DashArray[i] = dashArray[i] * fPenWidth; + } + } + return TRUE; +} +typedef FX_BOOL (CFDE_FxgeDevice::*pfFillPath)(IFDE_Brush* pBrush, + const CFX_PathData* pPath, + const CFX_Matrix* pMatrix); +static const pfFillPath gs_FillPath[] = { + &CFDE_FxgeDevice::FillSolidPath, &CFDE_FxgeDevice::FillHatchPath, + &CFDE_FxgeDevice::FillTexturePath, &CFDE_FxgeDevice::FillLinearGradientPath, +}; +FX_BOOL CFDE_FxgeDevice::FillPath(IFDE_Brush* pBrush, + const IFDE_Path* pPath, + const CFX_Matrix* pMatrix) { + CFDE_Path* pGePath = (CFDE_Path*)pPath; + if (pGePath == NULL) { + return FALSE; + } + if (pBrush == NULL) { + return FALSE; + } + int32_t iType = pBrush->GetType(); + if (iType < 0 || iType > FDE_BRUSHTYPE_MAX) { + return FALSE; + } + return (this->*gs_FillPath[iType])(pBrush, &pGePath->m_Path, pMatrix); +} +FX_BOOL CFDE_FxgeDevice::FillSolidPath(IFDE_Brush* pBrush, + const CFX_PathData* pPath, + const CFX_Matrix* pMatrix) { + FXSYS_assert(pPath && pBrush && pBrush->GetType() == FDE_BRUSHTYPE_Solid); + IFDE_SolidBrush* pSolidBrush = (IFDE_SolidBrush*)pBrush; + return m_pDevice->DrawPath(pPath, (const CFX_Matrix*)pMatrix, NULL, + pSolidBrush->GetColor(), 0, FXFILL_WINDING); +} +FX_BOOL CFDE_FxgeDevice::FillHatchPath(IFDE_Brush* pBrush, + const CFX_PathData* pPath, + const CFX_Matrix* pMatrix) { + FXSYS_assert(pPath && pBrush && pBrush->GetType() == FDE_BRUSHTYPE_Hatch); + IFDE_HatchBrush* pHatchBrush = (IFDE_HatchBrush*)pBrush; + int32_t iStyle = pHatchBrush->GetHatchStyle(); + if (iStyle < FDE_HATCHSTYLE_Min || iStyle > FDE_HATCHSTYLE_Max) { + return FALSE; + } + CFX_DIBitmap mask; + if (!FDE_GetStockHatchMask(iStyle, mask)) { + return FALSE; + } + FX_ARGB dwForeColor = pHatchBrush->GetColor(TRUE); + FX_ARGB dwBackColor = pHatchBrush->GetColor(FALSE); + CFX_FloatRect rectf = pPath->GetBoundingBox(); + if (pMatrix) { + rectf.Transform((const CFX_Matrix*)pMatrix); + } + FX_RECT rect(FXSYS_round(rectf.left), FXSYS_round(rectf.top), + FXSYS_round(rectf.right), FXSYS_round(rectf.bottom)); + m_pDevice->SaveState(); + m_pDevice->StartRendering(); + m_pDevice->SetClip_PathFill(pPath, (const CFX_Matrix*)pMatrix, + FXFILL_WINDING); + m_pDevice->FillRect(&rect, dwBackColor); + for (int32_t j = rect.bottom; j < rect.top; j += mask.GetHeight()) + for (int32_t i = rect.left; i < rect.right; i += mask.GetWidth()) { + m_pDevice->SetBitMask(&mask, i, j, dwForeColor); + } + m_pDevice->EndRendering(); + m_pDevice->RestoreState(); + return TRUE; +} +FX_BOOL CFDE_FxgeDevice::FillTexturePath(IFDE_Brush* pBrush, + const CFX_PathData* pPath, + const CFX_Matrix* pMatrix) { + FXSYS_assert(pPath && pBrush && pBrush->GetType() == FDE_BRUSHTYPE_Texture); + IFDE_TextureBrush* pTextureBrush = static_cast<IFDE_TextureBrush*>(pBrush); + IFDE_Image* pImage = pTextureBrush->GetImage(); + if (!pImage) + return FALSE; + + CFX_Size size(pImage->GetImageWidth(), pImage->GetImageHeight()); + CFX_DIBitmap bmp; + bmp.Create(size.x, size.y, FXDIB_Argb); + if (!pImage->StartLoadImage(&bmp, 0, 0, size.x, size.y, 0, 0, size.x, + size.y)) { + return FALSE; + } + if (pImage->DoLoadImage() < 100) { + return FALSE; + } + pImage->StopLoadImage(); + return WrapTexture(pTextureBrush->GetWrapMode(), &bmp, pPath, pMatrix); +} +FX_BOOL CFDE_FxgeDevice::WrapTexture(int32_t iWrapMode, + const CFX_DIBitmap* pBitmap, + const CFX_PathData* pPath, + const CFX_Matrix* pMatrix) { + CFX_FloatRect rectf = pPath->GetBoundingBox(); + if (pMatrix) { + rectf.Transform((const CFX_Matrix*)pMatrix); + } + FX_RECT rect(FXSYS_round(rectf.left), FXSYS_round(rectf.top), + FXSYS_round(rectf.right), FXSYS_round(rectf.bottom)); + rect.Normalize(); + if (rect.IsEmpty()) { + return FALSE; + } + m_pDevice->SaveState(); + m_pDevice->StartRendering(); + m_pDevice->SetClip_PathFill(pPath, (const CFX_Matrix*)pMatrix, + FXFILL_WINDING); + switch (iWrapMode) { + case FDE_WRAPMODE_Tile: + case FDE_WRAPMODE_TileFlipX: + case FDE_WRAPMODE_TileFlipY: + case FDE_WRAPMODE_TileFlipXY: { + FX_BOOL bFlipX = iWrapMode == FDE_WRAPMODE_TileFlipXY || + iWrapMode == FDE_WRAPMODE_TileFlipX; + FX_BOOL bFlipY = iWrapMode == FDE_WRAPMODE_TileFlipXY || + iWrapMode == FDE_WRAPMODE_TileFlipY; + const CFX_DIBitmap* pFlip[2][2]; + pFlip[0][0] = pBitmap; + pFlip[0][1] = bFlipX ? pBitmap->FlipImage(TRUE, FALSE) : pBitmap; + pFlip[1][0] = bFlipY ? pBitmap->FlipImage(FALSE, TRUE) : pBitmap; + pFlip[1][1] = + (bFlipX || bFlipY) ? pBitmap->FlipImage(bFlipX, bFlipY) : pBitmap; + int32_t iCounterY = 0; + for (int32_t j = rect.top; j < rect.bottom; j += pBitmap->GetHeight()) { + int32_t indexY = iCounterY++ % 2; + int32_t iCounterX = 0; + for (int32_t i = rect.left; i < rect.right; i += pBitmap->GetWidth()) { + int32_t indexX = iCounterX++ % 2; + m_pDevice->SetDIBits(pFlip[indexY][indexX], i, j); + } + } + if (pFlip[0][1] != pFlip[0][0]) { + delete pFlip[0][1]; + } + if (pFlip[1][0] != pFlip[0][0]) { + delete pFlip[1][0]; + } + if (pFlip[1][1] != pFlip[0][0]) { + delete pFlip[1][1]; + } + } break; + case FDE_WRAPMODE_Clamp: { + m_pDevice->SetDIBits(pBitmap, rect.left, rect.bottom); + } break; + } + m_pDevice->EndRendering(); + m_pDevice->RestoreState(); + return TRUE; +} +FX_BOOL CFDE_FxgeDevice::FillLinearGradientPath(IFDE_Brush* pBrush, + const CFX_PathData* pPath, + const CFX_Matrix* pMatrix) { + FXSYS_assert(pPath && pBrush && + pBrush->GetType() == FDE_BRUSHTYPE_LinearGradient); + IFDE_LinearGradientBrush* pLinearBrush = (IFDE_LinearGradientBrush*)pBrush; + CFX_PointF pt0, pt1; + pLinearBrush->GetLinearPoints(pt0, pt1); + CFX_VectorF fDiagonal(pt0, pt1); + FX_FLOAT fTheta = FXSYS_atan2(fDiagonal.y, fDiagonal.x); + FX_FLOAT fLength = fDiagonal.Length(); + FX_FLOAT fTotalX = fLength / FXSYS_cos(fTheta); + FX_FLOAT fTotalY = fLength / FXSYS_cos(FX_PI / 2 - fTheta); + FX_FLOAT fSteps = std::max(fTotalX, fTotalY); + FX_FLOAT dx = fTotalX / fSteps; + FX_FLOAT dy = fTotalY / fSteps; + FX_ARGB cr0, cr1; + pLinearBrush->GetLinearColors(cr0, cr1); + FX_FLOAT a0 = FXARGB_A(cr0); + FX_FLOAT r0 = FXARGB_R(cr0); + FX_FLOAT g0 = FXARGB_G(cr0); + FX_FLOAT b0 = FXARGB_B(cr0); + FX_FLOAT da = (FXARGB_A(cr1) - a0) / fSteps; + FX_FLOAT dr = (FXARGB_R(cr1) - r0) / fSteps; + FX_FLOAT dg = (FXARGB_G(cr1) - g0) / fSteps; + FX_FLOAT db = (FXARGB_B(cr1) - b0) / fSteps; + CFX_DIBitmap bmp; + bmp.Create(FXSYS_round(FXSYS_fabs(fDiagonal.x)), + FXSYS_round(FXSYS_fabs(fDiagonal.y)), FXDIB_Argb); + CFX_FxgeDevice dev; + dev.Attach(&bmp); + pt1 = pt0; + int32_t iSteps = FXSYS_round(FXSYS_ceil(fSteps)); + while (--iSteps >= 0) { + cr0 = ArgbEncode(FXSYS_round(a0), FXSYS_round(r0), FXSYS_round(g0), + FXSYS_round(b0)); + dev.DrawCosmeticLine(pt0.x, pt0.y, pt1.x, pt1.y, cr0); + pt1.x += dx; + pt0.y += dy; + a0 += da; + r0 += dr; + g0 += dg; + b0 += db; + } + return WrapTexture(pLinearBrush->GetWrapMode(), &bmp, pPath, pMatrix); +} |