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Diffstat (limited to 'core/fxge/cfx_renderdevice.cpp')
| -rw-r--r-- | core/fxge/cfx_renderdevice.cpp | 1135 |
1 files changed, 1135 insertions, 0 deletions
diff --git a/core/fxge/cfx_renderdevice.cpp b/core/fxge/cfx_renderdevice.cpp new file mode 100644 index 0000000000..266ae50e78 --- /dev/null +++ b/core/fxge/cfx_renderdevice.cpp @@ -0,0 +1,1135 @@ +// Copyright 2016 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/cfx_renderdevice.h" + +#include <algorithm> +#include <memory> +#include <utility> +#include <vector> + +#include "core/fxcrt/fx_safe_types.h" +#include "core/fxge/cfx_defaultrenderdevice.h" +#include "core/fxge/cfx_facecache.h" +#include "core/fxge/cfx_gemodule.h" +#include "core/fxge/cfx_graphstatedata.h" +#include "core/fxge/cfx_pathdata.h" +#include "core/fxge/dib/cfx_imagerenderer.h" +#include "core/fxge/ifx_renderdevicedriver.h" + +#if defined _SKIA_SUPPORT_ || defined _SKIA_SUPPORT_PATHS_ +#include "third_party/skia/include/core/SkTypes.h" +#endif + +namespace { + +void AdjustGlyphSpace(std::vector<FXTEXT_GLYPHPOS>* pGlyphAndPos) { + ASSERT(pGlyphAndPos->size() > 1); + std::vector<FXTEXT_GLYPHPOS>& glyphs = *pGlyphAndPos; + bool bVertical = glyphs.back().m_Origin.x == glyphs.front().m_Origin.x; + if (!bVertical && (glyphs.back().m_Origin.y != glyphs.front().m_Origin.y)) + return; + + for (size_t i = glyphs.size() - 1; i > 1; --i) { + FXTEXT_GLYPHPOS& next = glyphs[i]; + int next_origin = bVertical ? next.m_Origin.y : next.m_Origin.x; + float next_origin_f = bVertical ? next.m_fOrigin.y : next.m_fOrigin.x; + + FXTEXT_GLYPHPOS& current = glyphs[i - 1]; + int& current_origin = bVertical ? current.m_Origin.y : current.m_Origin.x; + float current_origin_f = + bVertical ? current.m_fOrigin.y : current.m_fOrigin.x; + + int space = next_origin - current_origin; + float space_f = next_origin_f - current_origin_f; + float error = fabs(space_f) - fabs(static_cast<float>(space)); + if (error > 0.5f) + current_origin += space > 0 ? -1 : 1; + } +} + +const uint8_t g_TextGammaAdjust[256] = { + 0, 2, 3, 4, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18, + 19, 21, 22, 23, 24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, + 36, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, + 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, + 68, 69, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, + 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, + 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, + 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, + 129, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, + 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 156, + 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, + 172, 173, 174, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, + 186, 187, 188, 189, 190, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, + 200, 201, 202, 203, 204, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, + 214, 215, 216, 217, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, + 228, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 239, 240, + 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 250, 251, 252, 253, 254, + 255, +}; + +int TextGammaAdjust(int value) { + ASSERT(value >= 0); + ASSERT(value <= 255); + return g_TextGammaAdjust[value]; +} + +int CalcAlpha(int src, int alpha) { + return src * alpha / 255; +} + +void Merge(uint8_t src, int channel, int alpha, uint8_t* dest) { + *dest = FXDIB_ALPHA_MERGE(*dest, channel, CalcAlpha(src, alpha)); +} + +void MergeGammaAdjust(uint8_t src, int channel, int alpha, uint8_t* dest) { + *dest = + FXDIB_ALPHA_MERGE(*dest, channel, CalcAlpha(TextGammaAdjust(src), alpha)); +} + +void MergeGammaAdjustBgr(const uint8_t* src, + int r, + int g, + int b, + int a, + uint8_t* dest) { + MergeGammaAdjust(src[0], b, a, &dest[0]); + MergeGammaAdjust(src[1], g, a, &dest[1]); + MergeGammaAdjust(src[2], r, a, &dest[2]); +} + +void MergeGammaAdjustRgb(const uint8_t* src, + int r, + int g, + int b, + int a, + uint8_t* dest) { + MergeGammaAdjust(src[2], b, a, &dest[0]); + MergeGammaAdjust(src[1], g, a, &dest[1]); + MergeGammaAdjust(src[0], r, a, &dest[2]); +} + +int AverageRgb(const uint8_t* src) { + return (src[0] + src[1] + src[2]) / 3; +} + +uint8_t CalculateDestAlpha(uint8_t back_alpha, int src_alpha) { + return back_alpha + src_alpha - back_alpha * src_alpha / 255; +} + +void ApplyDestAlpha(uint8_t back_alpha, + int src_alpha, + int r, + int g, + int b, + uint8_t* dest) { + uint8_t dest_alpha = CalculateDestAlpha(back_alpha, src_alpha); + int alpha_ratio = src_alpha * 255 / dest_alpha; + dest[0] = FXDIB_ALPHA_MERGE(dest[0], b, alpha_ratio); + dest[1] = FXDIB_ALPHA_MERGE(dest[1], g, alpha_ratio); + dest[2] = FXDIB_ALPHA_MERGE(dest[2], r, alpha_ratio); + dest[3] = dest_alpha; +} + +void NormalizeRgbDst(int src_value, int r, int g, int b, int a, uint8_t* dest) { + int src_alpha = CalcAlpha(TextGammaAdjust(src_value), a); + dest[0] = FXDIB_ALPHA_MERGE(dest[0], b, src_alpha); + dest[1] = FXDIB_ALPHA_MERGE(dest[1], g, src_alpha); + dest[2] = FXDIB_ALPHA_MERGE(dest[2], r, src_alpha); +} + +void NormalizeRgbSrc(int src_value, int r, int g, int b, int a, uint8_t* dest) { + int src_alpha = CalcAlpha(TextGammaAdjust(src_value), a); + if (src_alpha == 0) + return; + + dest[0] = FXDIB_ALPHA_MERGE(dest[0], b, src_alpha); + dest[1] = FXDIB_ALPHA_MERGE(dest[1], g, src_alpha); + dest[2] = FXDIB_ALPHA_MERGE(dest[2], r, src_alpha); +} + +void NormalizeArgbDest(int src_value, + int r, + int g, + int b, + int a, + uint8_t* dest) { + int src_alpha = CalcAlpha(TextGammaAdjust(src_value), a); + uint8_t back_alpha = dest[3]; + if (back_alpha == 0) { + FXARGB_SETDIB(dest, FXARGB_MAKE(src_alpha, r, g, b)); + } else if (src_alpha != 0) { + ApplyDestAlpha(back_alpha, src_alpha, r, g, b, dest); + } +} + +void NormalizeArgbSrc(int src_value, + int r, + int g, + int b, + int a, + uint8_t* dest) { + int src_alpha = CalcAlpha(TextGammaAdjust(src_value), a); + if (src_alpha == 0) + return; + + uint8_t back_alpha = dest[3]; + if (back_alpha == 0) { + FXARGB_SETDIB(dest, FXARGB_MAKE(src_alpha, r, g, b)); + } else { + ApplyDestAlpha(back_alpha, src_alpha, r, g, b, dest); + } +} + +void NextPixel(uint8_t** src_scan, uint8_t** dst_scan, int bpp) { + *src_scan += 3; + *dst_scan += bpp; +} + +void SetAlpha(uint8_t* alpha) { + alpha[3] = 255; +} + +void SetAlphaDoNothing(uint8_t* alpha) {} + +void DrawNormalTextHelper(const CFX_RetainPtr<CFX_DIBitmap>& bitmap, + const CFX_RetainPtr<CFX_DIBitmap>& pGlyph, + int nrows, + int left, + int top, + int start_col, + int end_col, + bool bNormal, + bool bBGRStripe, + int x_subpixel, + int a, + int r, + int g, + int b) { + const bool has_alpha = bitmap->GetFormat() == FXDIB_Argb; + uint8_t* src_buf = pGlyph->GetBuffer(); + int src_pitch = pGlyph->GetPitch(); + uint8_t* dest_buf = bitmap->GetBuffer(); + int dest_pitch = bitmap->GetPitch(); + const int Bpp = has_alpha ? 4 : bitmap->GetBPP() / 8; + auto* pNormalizeSrcFunc = has_alpha ? &NormalizeArgbSrc : &NormalizeRgbDst; + auto* pNormalizeDstFunc = has_alpha ? &NormalizeArgbDest : &NormalizeRgbSrc; + auto* pSetAlpha = has_alpha ? &SetAlpha : &SetAlphaDoNothing; + + for (int row = 0; row < nrows; row++) { + int dest_row = row + top; + if (dest_row < 0 || dest_row >= bitmap->GetHeight()) + continue; + + uint8_t* src_scan = src_buf + row * src_pitch + (start_col - left) * 3; + uint8_t* dest_scan = dest_buf + dest_row * dest_pitch + start_col * Bpp; + if (bBGRStripe) { + if (x_subpixel == 0) { + for (int col = start_col; col < end_col; col++) { + if (has_alpha) { + Merge(src_scan[2], r, a, &dest_scan[2]); + Merge(src_scan[1], g, a, &dest_scan[1]); + Merge(src_scan[0], b, a, &dest_scan[0]); + } else { + MergeGammaAdjustBgr(&src_scan[0], r, g, b, a, &dest_scan[0]); + } + pSetAlpha(dest_scan); + NextPixel(&src_scan, &dest_scan, Bpp); + } + } else if (x_subpixel == 1) { + MergeGammaAdjust(src_scan[1], r, a, &dest_scan[2]); + MergeGammaAdjust(src_scan[0], g, a, &dest_scan[1]); + if (start_col > left) + MergeGammaAdjust(src_scan[-1], b, a, &dest_scan[0]); + pSetAlpha(dest_scan); + NextPixel(&src_scan, &dest_scan, Bpp); + for (int col = start_col + 1; col < end_col - 1; col++) { + MergeGammaAdjustBgr(&src_scan[-1], r, g, b, a, &dest_scan[0]); + pSetAlpha(dest_scan); + NextPixel(&src_scan, &dest_scan, Bpp); + } + } else { + MergeGammaAdjust(src_scan[0], r, a, &dest_scan[2]); + if (start_col > left) { + MergeGammaAdjust(src_scan[-1], g, a, &dest_scan[1]); + MergeGammaAdjust(src_scan[-2], b, a, &dest_scan[0]); + } + pSetAlpha(dest_scan); + NextPixel(&src_scan, &dest_scan, Bpp); + for (int col = start_col + 1; col < end_col - 1; col++) { + MergeGammaAdjustBgr(&src_scan[-2], r, g, b, a, &dest_scan[0]); + pSetAlpha(dest_scan); + NextPixel(&src_scan, &dest_scan, Bpp); + } + } + } else { + if (x_subpixel == 0) { + for (int col = start_col; col < end_col; col++) { + if (bNormal) { + int src_value = AverageRgb(&src_scan[0]); + pNormalizeDstFunc(src_value, r, g, b, a, dest_scan); + } else { + MergeGammaAdjustRgb(&src_scan[0], r, g, b, a, &dest_scan[0]); + pSetAlpha(dest_scan); + } + NextPixel(&src_scan, &dest_scan, Bpp); + } + } else if (x_subpixel == 1) { + if (bNormal) { + int src_value = start_col > left ? AverageRgb(&src_scan[-1]) + : (src_scan[0] + src_scan[1]) / 3; + pNormalizeSrcFunc(src_value, r, g, b, a, dest_scan); + } else { + if (start_col > left) + MergeGammaAdjust(src_scan[-1], r, a, &dest_scan[2]); + MergeGammaAdjust(src_scan[0], g, a, &dest_scan[1]); + MergeGammaAdjust(src_scan[1], b, a, &dest_scan[0]); + pSetAlpha(dest_scan); + } + NextPixel(&src_scan, &dest_scan, Bpp); + for (int col = start_col + 1; col < end_col; col++) { + if (bNormal) { + int src_value = AverageRgb(&src_scan[-1]); + pNormalizeDstFunc(src_value, r, g, b, a, dest_scan); + } else { + MergeGammaAdjustRgb(&src_scan[-1], r, g, b, a, &dest_scan[0]); + pSetAlpha(dest_scan); + } + NextPixel(&src_scan, &dest_scan, Bpp); + } + } else { + if (bNormal) { + int src_value = + start_col > left ? AverageRgb(&src_scan[-2]) : src_scan[0] / 3; + pNormalizeSrcFunc(src_value, r, g, b, a, dest_scan); + } else { + if (start_col > left) { + MergeGammaAdjust(src_scan[-2], r, a, &dest_scan[2]); + MergeGammaAdjust(src_scan[-1], g, a, &dest_scan[1]); + } + MergeGammaAdjust(src_scan[0], b, a, &dest_scan[0]); + pSetAlpha(dest_scan); + } + NextPixel(&src_scan, &dest_scan, Bpp); + for (int col = start_col + 1; col < end_col; col++) { + if (bNormal) { + int src_value = AverageRgb(&src_scan[-2]); + pNormalizeDstFunc(src_value, r, g, b, a, dest_scan); + } else { + MergeGammaAdjustRgb(&src_scan[-2], r, g, b, a, &dest_scan[0]); + pSetAlpha(dest_scan); + } + NextPixel(&src_scan, &dest_scan, Bpp); + } + } + } + } +} + +bool ShouldDrawDeviceText(const CFX_Font* pFont, uint32_t text_flags) { +#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ + if (text_flags & FXFONT_CIDFONT) + return false; + + const CFX_ByteString bsPsName = pFont->GetPsName(); + if (bsPsName.Find("+ZJHL") != -1) + return false; + + if (bsPsName == "CNAAJI+cmex10") + return false; +#endif + return true; +} + +} // namespace + +FXTEXT_CHARPOS::FXTEXT_CHARPOS() + : m_GlyphIndex(0), + m_FontCharWidth(0), +#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ + m_ExtGID(0), +#endif + m_FallbackFontPosition(0), + m_bGlyphAdjust(false), + m_bFontStyle(false) { +} + +FXTEXT_CHARPOS::FXTEXT_CHARPOS(const FXTEXT_CHARPOS&) = default; + +FXTEXT_CHARPOS::~FXTEXT_CHARPOS(){}; + +CFX_RenderDevice::CFX_RenderDevice() + : m_pBitmap(nullptr), + m_Width(0), + m_Height(0), + m_bpp(0), + m_RenderCaps(0), + m_DeviceClass(0) {} + +CFX_RenderDevice::~CFX_RenderDevice() { + RestoreState(false); +#if defined _SKIA_SUPPORT_ || defined _SKIA_SUPPORT_PATHS_ + Flush(); +#endif +} + +#if defined _SKIA_SUPPORT_ || defined _SKIA_SUPPORT_PATHS_ +void CFX_RenderDevice::Flush() { + m_pDeviceDriver.reset(); +} +#endif + +void CFX_RenderDevice::SetDeviceDriver( + std::unique_ptr<IFX_RenderDeviceDriver> pDriver) { + m_pDeviceDriver = std::move(pDriver); + InitDeviceInfo(); +} + +void CFX_RenderDevice::InitDeviceInfo() { + m_Width = m_pDeviceDriver->GetDeviceCaps(FXDC_PIXEL_WIDTH); + m_Height = m_pDeviceDriver->GetDeviceCaps(FXDC_PIXEL_HEIGHT); + m_bpp = m_pDeviceDriver->GetDeviceCaps(FXDC_BITS_PIXEL); + m_RenderCaps = m_pDeviceDriver->GetDeviceCaps(FXDC_RENDER_CAPS); + m_DeviceClass = m_pDeviceDriver->GetDeviceCaps(FXDC_DEVICE_CLASS); + if (!m_pDeviceDriver->GetClipBox(&m_ClipBox)) { + m_ClipBox.left = 0; + m_ClipBox.top = 0; + m_ClipBox.right = m_Width; + m_ClipBox.bottom = m_Height; + } +} + +void CFX_RenderDevice::SaveState() { + m_pDeviceDriver->SaveState(); +} + +void CFX_RenderDevice::RestoreState(bool bKeepSaved) { + if (m_pDeviceDriver) { + m_pDeviceDriver->RestoreState(bKeepSaved); + UpdateClipBox(); + } +} + +int CFX_RenderDevice::GetDeviceCaps(int caps_id) const { + return m_pDeviceDriver->GetDeviceCaps(caps_id); +} + +CFX_Matrix CFX_RenderDevice::GetCTM() const { + return m_pDeviceDriver->GetCTM(); +} + +bool CFX_RenderDevice::CreateCompatibleBitmap( + const CFX_RetainPtr<CFX_DIBitmap>& pDIB, + int width, + int height) const { + if (m_RenderCaps & FXRC_CMYK_OUTPUT) { + return pDIB->Create( + width, height, + m_RenderCaps & FXRC_ALPHA_OUTPUT ? FXDIB_Cmyka : FXDIB_Cmyk); + } + if (m_RenderCaps & FXRC_BYTEMASK_OUTPUT) + return pDIB->Create(width, height, FXDIB_8bppMask); +#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ || defined _SKIA_SUPPORT_PATHS_ + return pDIB->Create( + width, height, + m_RenderCaps & FXRC_ALPHA_OUTPUT ? FXDIB_Argb : FXDIB_Rgb32); +#else + return pDIB->Create( + width, height, m_RenderCaps & FXRC_ALPHA_OUTPUT ? FXDIB_Argb : FXDIB_Rgb); +#endif +} + +bool CFX_RenderDevice::SetClip_PathFill(const CFX_PathData* pPathData, + const CFX_Matrix* pObject2Device, + int fill_mode) { + if (!m_pDeviceDriver->SetClip_PathFill(pPathData, pObject2Device, + fill_mode)) { + return false; + } + UpdateClipBox(); + return true; +} + +bool CFX_RenderDevice::SetClip_PathStroke( + const CFX_PathData* pPathData, + const CFX_Matrix* pObject2Device, + const CFX_GraphStateData* pGraphState) { + if (!m_pDeviceDriver->SetClip_PathStroke(pPathData, pObject2Device, + pGraphState)) { + return false; + } + UpdateClipBox(); + return true; +} + +bool CFX_RenderDevice::SetClip_Rect(const FX_RECT& rect) { + CFX_PathData path; + path.AppendRect(rect.left, rect.bottom, rect.right, rect.top); + if (!SetClip_PathFill(&path, nullptr, FXFILL_WINDING)) + return false; + + UpdateClipBox(); + return true; +} + +void CFX_RenderDevice::UpdateClipBox() { + if (m_pDeviceDriver->GetClipBox(&m_ClipBox)) + return; + m_ClipBox.left = 0; + m_ClipBox.top = 0; + m_ClipBox.right = m_Width; + m_ClipBox.bottom = m_Height; +} + +bool CFX_RenderDevice::DrawPathWithBlend(const CFX_PathData* pPathData, + const CFX_Matrix* pObject2Device, + const CFX_GraphStateData* pGraphState, + uint32_t fill_color, + uint32_t stroke_color, + int fill_mode, + int blend_type) { + uint8_t stroke_alpha = pGraphState ? FXARGB_A(stroke_color) : 0; + uint8_t fill_alpha = (fill_mode & 3) ? FXARGB_A(fill_color) : 0; + const std::vector<FX_PATHPOINT>& pPoints = pPathData->GetPoints(); + if (stroke_alpha == 0 && pPoints.size() == 2) { + CFX_PointF pos1 = pPoints[0].m_Point; + CFX_PointF pos2 = pPoints[1].m_Point; + if (pObject2Device) { + pos1 = pObject2Device->Transform(pos1); + pos2 = pObject2Device->Transform(pos2); + } + DrawCosmeticLine(pos1.x, pos1.y, pos2.x, pos2.y, fill_color, fill_mode, + blend_type); + return true; + } + + if ((pPoints.size() == 5 || pPoints.size() == 4) && stroke_alpha == 0) { + CFX_FloatRect rect_f; + if (!(fill_mode & FXFILL_RECT_AA) && + pPathData->IsRect(pObject2Device, &rect_f)) { + FX_RECT rect_i = rect_f.GetOuterRect(); + + // Depending on the top/bottom, left/right values of the rect it's + // possible to overflow the Width() and Height() calculations. Check that + // the rect will have valid dimension before continuing. + if (!rect_i.Valid()) + return false; + + int width = (int)ceil(rect_f.right - rect_f.left); + if (width < 1) { + width = 1; + if (rect_i.left == rect_i.right) + rect_i.right++; + } + int height = (int)ceil(rect_f.top - rect_f.bottom); + if (height < 1) { + height = 1; + if (rect_i.bottom == rect_i.top) + rect_i.bottom++; + } + if (rect_i.Width() >= width + 1) { + if (rect_f.left - (float)(rect_i.left) > + (float)(rect_i.right) - rect_f.right) { + rect_i.left++; + } else { + rect_i.right--; + } + } + if (rect_i.Height() >= height + 1) { + if (rect_f.top - (float)(rect_i.top) > + (float)(rect_i.bottom) - rect_f.bottom) { + rect_i.top++; + } else { + rect_i.bottom--; + } + } + if (FillRectWithBlend(&rect_i, fill_color, blend_type)) + return true; + } + } + if ((fill_mode & 3) && stroke_alpha == 0 && !(fill_mode & FX_FILL_STROKE) && + !(fill_mode & FX_FILL_TEXT_MODE)) { + CFX_PathData newPath; + bool bThin = false; + bool setIdentity = false; + if (pPathData->GetZeroAreaPath(pObject2Device, + !!m_pDeviceDriver->GetDriverType(), &newPath, + &bThin, &setIdentity)) { + CFX_GraphStateData graphState; + graphState.m_LineWidth = 0.0f; + + uint32_t strokecolor = fill_color; + if (bThin) + strokecolor = (((fill_alpha >> 2) << 24) | (strokecolor & 0x00ffffff)); + + const CFX_Matrix* pMatrix = nullptr; + if (pObject2Device && !pObject2Device->IsIdentity() && !setIdentity) + pMatrix = pObject2Device; + + int smooth_path = FX_ZEROAREA_FILL; + if (fill_mode & FXFILL_NOPATHSMOOTH) + smooth_path |= FXFILL_NOPATHSMOOTH; + + m_pDeviceDriver->DrawPath(&newPath, pMatrix, &graphState, 0, strokecolor, + smooth_path, blend_type); + } + } + if ((fill_mode & 3) && fill_alpha && stroke_alpha < 0xff && + (fill_mode & FX_FILL_STROKE)) { + if (m_RenderCaps & FXRC_FILLSTROKE_PATH) { + return m_pDeviceDriver->DrawPath(pPathData, pObject2Device, pGraphState, + fill_color, stroke_color, fill_mode, + blend_type); + } + return DrawFillStrokePath(pPathData, pObject2Device, pGraphState, + fill_color, stroke_color, fill_mode, blend_type); + } + return m_pDeviceDriver->DrawPath(pPathData, pObject2Device, pGraphState, + fill_color, stroke_color, fill_mode, + blend_type); +} + +// This can be removed once PDFium entirely relies on Skia +bool CFX_RenderDevice::DrawFillStrokePath(const CFX_PathData* pPathData, + const CFX_Matrix* pObject2Device, + const CFX_GraphStateData* pGraphState, + uint32_t fill_color, + uint32_t stroke_color, + int fill_mode, + int blend_type) { + if (!(m_RenderCaps & FXRC_GET_BITS)) + return false; + CFX_FloatRect bbox; + if (pGraphState) { + bbox = pPathData->GetBoundingBox(pGraphState->m_LineWidth, + pGraphState->m_MiterLimit); + } else { + bbox = pPathData->GetBoundingBox(); + } + if (pObject2Device) + pObject2Device->TransformRect(bbox); + + CFX_Matrix ctm = GetCTM(); + float fScaleX = fabs(ctm.a); + float fScaleY = fabs(ctm.d); + FX_RECT rect = bbox.GetOuterRect(); + auto bitmap = pdfium::MakeRetain<CFX_DIBitmap>(); + auto Backdrop = pdfium::MakeRetain<CFX_DIBitmap>(); + if (!CreateCompatibleBitmap(bitmap, FXSYS_round(rect.Width() * fScaleX), + FXSYS_round(rect.Height() * fScaleY))) { + return false; + } + if (bitmap->HasAlpha()) { + bitmap->Clear(0); + Backdrop->Copy(bitmap); + } else { + if (!m_pDeviceDriver->GetDIBits(bitmap, rect.left, rect.top)) + return false; + Backdrop->Copy(bitmap); + } + CFX_DefaultRenderDevice bitmap_device; + bitmap_device.Attach(bitmap, false, Backdrop, true); + + CFX_Matrix matrix; + if (pObject2Device) + matrix = *pObject2Device; + matrix.Translate(-rect.left, -rect.top); + matrix.Concat(CFX_Matrix(fScaleX, 0, 0, fScaleY, 0, 0)); + if (!bitmap_device.GetDeviceDriver()->DrawPath( + pPathData, &matrix, pGraphState, fill_color, stroke_color, fill_mode, + blend_type)) { + return false; + } +#if defined _SKIA_SUPPORT_ || defined _SKIA_SUPPORT_PATHS_ + bitmap_device.GetDeviceDriver()->Flush(); +#endif + FX_RECT src_rect(0, 0, FXSYS_round(rect.Width() * fScaleX), + FXSYS_round(rect.Height() * fScaleY)); + return m_pDeviceDriver->SetDIBits(bitmap, 0, &src_rect, rect.left, rect.top, + FXDIB_BLEND_NORMAL); +} + +bool CFX_RenderDevice::SetPixel(int x, int y, uint32_t color) { + if (m_pDeviceDriver->SetPixel(x, y, color)) + return true; + + FX_RECT rect(x, y, x + 1, y + 1); + return FillRectWithBlend(&rect, color, FXDIB_BLEND_NORMAL); +} + +bool CFX_RenderDevice::FillRectWithBlend(const FX_RECT* pRect, + uint32_t fill_color, + int blend_type) { + if (m_pDeviceDriver->FillRectWithBlend(pRect, fill_color, blend_type)) + return true; + + if (!(m_RenderCaps & FXRC_GET_BITS)) + return false; + + auto bitmap = pdfium::MakeRetain<CFX_DIBitmap>(); + if (!CreateCompatibleBitmap(bitmap, pRect->Width(), pRect->Height())) + return false; + + if (!m_pDeviceDriver->GetDIBits(bitmap, pRect->left, pRect->top)) + return false; + + if (!bitmap->CompositeRect(0, 0, pRect->Width(), pRect->Height(), fill_color, + 0)) { + return false; + } + FX_RECT src_rect(0, 0, pRect->Width(), pRect->Height()); + m_pDeviceDriver->SetDIBits(bitmap, 0, &src_rect, pRect->left, pRect->top, + FXDIB_BLEND_NORMAL); + return true; +} + +bool CFX_RenderDevice::DrawCosmeticLine(float x1, + float y1, + float x2, + float y2, + uint32_t color, + int fill_mode, + int blend_type) { + if ((color >= 0xff000000) && + m_pDeviceDriver->DrawCosmeticLine(x1, y1, x2, y2, color, blend_type)) { + return true; + } + CFX_GraphStateData graph_state; + CFX_PathData path; + path.AppendPoint(CFX_PointF(x1, y1), FXPT_TYPE::MoveTo, false); + path.AppendPoint(CFX_PointF(x2, y2), FXPT_TYPE::LineTo, false); + return m_pDeviceDriver->DrawPath(&path, nullptr, &graph_state, 0, color, + fill_mode, blend_type); +} + +bool CFX_RenderDevice::GetDIBits(const CFX_RetainPtr<CFX_DIBitmap>& pBitmap, + int left, + int top) { + if (!(m_RenderCaps & FXRC_GET_BITS)) + return false; + return m_pDeviceDriver->GetDIBits(pBitmap, left, top); +} + +CFX_RetainPtr<CFX_DIBitmap> CFX_RenderDevice::GetBackDrop() { + return m_pDeviceDriver->GetBackDrop(); +} + +bool CFX_RenderDevice::SetDIBitsWithBlend( + const CFX_RetainPtr<CFX_DIBSource>& pBitmap, + int left, + int top, + int blend_mode) { + ASSERT(!pBitmap->IsAlphaMask()); + CFX_Matrix ctm = GetCTM(); + float fScaleX = fabs(ctm.a); + float fScaleY = fabs(ctm.d); + FX_RECT dest_rect(left, top, + FXSYS_round(left + pBitmap->GetWidth() / fScaleX), + FXSYS_round(top + pBitmap->GetHeight() / fScaleY)); + dest_rect.Intersect(m_ClipBox); + if (dest_rect.IsEmpty()) + return true; + + FX_RECT src_rect(dest_rect.left - left, dest_rect.top - top, + dest_rect.left - left + dest_rect.Width(), + dest_rect.top - top + dest_rect.Height()); + src_rect.left = FXSYS_round(src_rect.left * fScaleX); + src_rect.top = FXSYS_round(src_rect.top * fScaleY); + src_rect.right = FXSYS_round(src_rect.right * fScaleX); + src_rect.bottom = FXSYS_round(src_rect.bottom * fScaleY); + if ((blend_mode != FXDIB_BLEND_NORMAL && !(m_RenderCaps & FXRC_BLEND_MODE)) || + (pBitmap->HasAlpha() && !(m_RenderCaps & FXRC_ALPHA_IMAGE))) { + if (!(m_RenderCaps & FXRC_GET_BITS)) + return false; + + int bg_pixel_width = FXSYS_round(dest_rect.Width() * fScaleX); + int bg_pixel_height = FXSYS_round(dest_rect.Height() * fScaleY); + auto background = pdfium::MakeRetain<CFX_DIBitmap>(); + if (!background->Create( + bg_pixel_width, bg_pixel_height, + (m_RenderCaps & FXRC_CMYK_OUTPUT) ? FXDIB_Cmyk : FXDIB_Rgb32)) { + return false; + } + if (!m_pDeviceDriver->GetDIBits(background, dest_rect.left, + dest_rect.top)) { + return false; + } + if (!background->CompositeBitmap(0, 0, bg_pixel_width, bg_pixel_height, + pBitmap, src_rect.left, src_rect.top, + blend_mode, nullptr, false)) { + return false; + } + FX_RECT rect(0, 0, bg_pixel_width, bg_pixel_height); + return m_pDeviceDriver->SetDIBits(background, 0, &rect, dest_rect.left, + dest_rect.top, FXDIB_BLEND_NORMAL); + } + return m_pDeviceDriver->SetDIBits(pBitmap, 0, &src_rect, dest_rect.left, + dest_rect.top, blend_mode); +} + +bool CFX_RenderDevice::StretchDIBitsWithFlagsAndBlend( + const CFX_RetainPtr<CFX_DIBSource>& pBitmap, + int left, + int top, + int dest_width, + int dest_height, + uint32_t flags, + int blend_mode) { + FX_RECT dest_rect(left, top, left + dest_width, top + dest_height); + FX_RECT clip_box = m_ClipBox; + clip_box.Intersect(dest_rect); + if (clip_box.IsEmpty()) + return true; + return m_pDeviceDriver->StretchDIBits(pBitmap, 0, left, top, dest_width, + dest_height, &clip_box, flags, + blend_mode); +} + +bool CFX_RenderDevice::SetBitMask(const CFX_RetainPtr<CFX_DIBSource>& pBitmap, + int left, + int top, + uint32_t argb) { + FX_RECT src_rect(0, 0, pBitmap->GetWidth(), pBitmap->GetHeight()); + return m_pDeviceDriver->SetDIBits(pBitmap, argb, &src_rect, left, top, + FXDIB_BLEND_NORMAL); +} + +bool CFX_RenderDevice::StretchBitMask( + const CFX_RetainPtr<CFX_DIBSource>& pBitmap, + int left, + int top, + int dest_width, + int dest_height, + uint32_t color) { + return StretchBitMaskWithFlags(pBitmap, left, top, dest_width, dest_height, + color, 0); +} + +bool CFX_RenderDevice::StretchBitMaskWithFlags( + const CFX_RetainPtr<CFX_DIBSource>& pBitmap, + int left, + int top, + int dest_width, + int dest_height, + uint32_t argb, + uint32_t flags) { + FX_RECT dest_rect(left, top, left + dest_width, top + dest_height); + FX_RECT clip_box = m_ClipBox; + clip_box.Intersect(dest_rect); + return m_pDeviceDriver->StretchDIBits(pBitmap, argb, left, top, dest_width, + dest_height, &clip_box, flags, + FXDIB_BLEND_NORMAL); +} + +bool CFX_RenderDevice::StartDIBitsWithBlend( + const CFX_RetainPtr<CFX_DIBSource>& pBitmap, + int bitmap_alpha, + uint32_t argb, + const CFX_Matrix* pMatrix, + uint32_t flags, + std::unique_ptr<CFX_ImageRenderer>* handle, + int blend_mode) { + return m_pDeviceDriver->StartDIBits(pBitmap, bitmap_alpha, argb, pMatrix, + flags, handle, blend_mode); +} + +bool CFX_RenderDevice::ContinueDIBits(CFX_ImageRenderer* handle, + IFX_Pause* pPause) { + return m_pDeviceDriver->ContinueDIBits(handle, pPause); +} + +#ifdef _SKIA_SUPPORT_ +void CFX_RenderDevice::DebugVerifyBitmapIsPreMultiplied() const { + SkASSERT(0); +} + +bool CFX_RenderDevice::SetBitsWithMask( + const CFX_RetainPtr<CFX_DIBSource>& pBitmap, + const CFX_RetainPtr<CFX_DIBSource>& pMask, + int left, + int top, + int bitmap_alpha, + int blend_type) { + return m_pDeviceDriver->SetBitsWithMask(pBitmap, pMask, left, top, + bitmap_alpha, blend_type); +} +#endif + +bool CFX_RenderDevice::DrawNormalText(int nChars, + const FXTEXT_CHARPOS* pCharPos, + CFX_Font* pFont, + float font_size, + const CFX_Matrix* pText2Device, + uint32_t fill_color, + uint32_t text_flags) { + int nativetext_flags = text_flags; + if (m_DeviceClass != FXDC_DISPLAY) { + if (!(text_flags & FXTEXT_PRINTGRAPHICTEXT)) { + if (ShouldDrawDeviceText(pFont, text_flags) && + m_pDeviceDriver->DrawDeviceText(nChars, pCharPos, pFont, pText2Device, + font_size, fill_color)) { + return true; + } + } + if (FXARGB_A(fill_color) < 255) + return false; + } else if (!(text_flags & FXTEXT_NO_NATIVETEXT)) { + if (ShouldDrawDeviceText(pFont, text_flags) && + m_pDeviceDriver->DrawDeviceText(nChars, pCharPos, pFont, pText2Device, + font_size, fill_color)) { + return true; + } + } + CFX_Matrix char2device; + CFX_Matrix text2Device; + if (pText2Device) { + char2device = *pText2Device; + text2Device = *pText2Device; + } + + char2device.Scale(font_size, -font_size); + if (fabs(char2device.a) + fabs(char2device.b) > 50 * 1.0f || + ((m_DeviceClass == FXDC_PRINTER) && + !(text_flags & FXTEXT_PRINTIMAGETEXT))) { + if (pFont->GetFace()) { + int nPathFlags = + (text_flags & FXTEXT_NOSMOOTH) == 0 ? 0 : FXFILL_NOPATHSMOOTH; + return DrawTextPath(nChars, pCharPos, pFont, font_size, pText2Device, + nullptr, nullptr, fill_color, 0, nullptr, nPathFlags); + } + } + int anti_alias = FXFT_RENDER_MODE_MONO; + bool bNormal = false; + if ((text_flags & FXTEXT_NOSMOOTH) == 0) { + if (m_DeviceClass == FXDC_DISPLAY && m_bpp > 1) { + if (!CFX_GEModule::Get()->GetFontMgr()->FTLibrarySupportsHinting()) { + // Some Freetype implementations (like the one packaged with Fedora) do + // not support hinting due to patents 6219025, 6239783, 6307566, + // 6225973, 6243070, 6393145, 6421054, 6282327, and 6624828; the latest + // one expires 10/7/19. This makes LCD antialiasing very ugly, so we + // instead fall back on NORMAL antialiasing. + anti_alias = FXFT_RENDER_MODE_NORMAL; + } else if ((m_RenderCaps & (FXRC_ALPHA_OUTPUT | FXRC_CMYK_OUTPUT))) { + anti_alias = FXFT_RENDER_MODE_LCD; + bNormal = true; + } else if (m_bpp < 16) { + anti_alias = FXFT_RENDER_MODE_NORMAL; + } else { + anti_alias = FXFT_RENDER_MODE_LCD; + + bool bClearType = false; + if (pFont->GetFace()) + bClearType = !!(text_flags & FXTEXT_CLEARTYPE); + bNormal = !bClearType; + } + } + } + std::vector<FXTEXT_GLYPHPOS> glyphs(nChars); + CFX_Matrix matrixCTM = GetCTM(); + float scale_x = fabs(matrixCTM.a); + float scale_y = fabs(matrixCTM.d); + CFX_Matrix deviceCtm = char2device; + CFX_Matrix m(scale_x, 0, 0, scale_y, 0, 0); + deviceCtm.Concat(m); + text2Device.Concat(m); + + for (size_t i = 0; i < glyphs.size(); ++i) { + FXTEXT_GLYPHPOS& glyph = glyphs[i]; + const FXTEXT_CHARPOS& charpos = pCharPos[i]; + + glyph.m_fOrigin = text2Device.Transform(charpos.m_Origin); + if (anti_alias < FXFT_RENDER_MODE_LCD) + glyph.m_Origin.x = FXSYS_round(glyph.m_fOrigin.x); + else + glyph.m_Origin.x = static_cast<int>(floor(glyph.m_fOrigin.x)); + glyph.m_Origin.y = FXSYS_round(glyph.m_fOrigin.y); + + if (charpos.m_bGlyphAdjust) { + CFX_Matrix new_matrix( + charpos.m_AdjustMatrix[0], charpos.m_AdjustMatrix[1], + charpos.m_AdjustMatrix[2], charpos.m_AdjustMatrix[3], 0, 0); + new_matrix.Concat(deviceCtm); + glyph.m_pGlyph = pFont->LoadGlyphBitmap( + charpos.m_GlyphIndex, charpos.m_bFontStyle, &new_matrix, + charpos.m_FontCharWidth, anti_alias, nativetext_flags); + } else { + glyph.m_pGlyph = pFont->LoadGlyphBitmap( + charpos.m_GlyphIndex, charpos.m_bFontStyle, &deviceCtm, + charpos.m_FontCharWidth, anti_alias, nativetext_flags); + } + } + if (anti_alias < FXFT_RENDER_MODE_LCD && glyphs.size() > 1) + AdjustGlyphSpace(&glyphs); + + FX_RECT bmp_rect1 = FXGE_GetGlyphsBBox(glyphs, anti_alias, 1.0f, 1.0f); + if (scale_x > 1 && scale_y > 1) { + bmp_rect1.left--; + bmp_rect1.top--; + bmp_rect1.right++; + bmp_rect1.bottom++; + } + FX_RECT bmp_rect(FXSYS_round((float)(bmp_rect1.left) / scale_x), + FXSYS_round((float)(bmp_rect1.top) / scale_y), + FXSYS_round((float)bmp_rect1.right / scale_x), + FXSYS_round((float)bmp_rect1.bottom / scale_y)); + bmp_rect.Intersect(m_ClipBox); + if (bmp_rect.IsEmpty()) + return true; + + int pixel_width = FXSYS_round(bmp_rect.Width() * scale_x); + int pixel_height = FXSYS_round(bmp_rect.Height() * scale_y); + int pixel_left = FXSYS_round(bmp_rect.left * scale_x); + int pixel_top = FXSYS_round(bmp_rect.top * scale_y); + if (anti_alias == FXFT_RENDER_MODE_MONO) { + auto bitmap = pdfium::MakeRetain<CFX_DIBitmap>(); + if (!bitmap->Create(pixel_width, pixel_height, FXDIB_1bppMask)) + return false; + bitmap->Clear(0); + for (const FXTEXT_GLYPHPOS& glyph : glyphs) { + if (!glyph.m_pGlyph) + continue; + CFX_RetainPtr<CFX_DIBitmap> pGlyph = glyph.m_pGlyph->m_pBitmap; + bitmap->TransferBitmap( + glyph.m_Origin.x + glyph.m_pGlyph->m_Left - pixel_left, + glyph.m_Origin.y - glyph.m_pGlyph->m_Top - pixel_top, + pGlyph->GetWidth(), pGlyph->GetHeight(), pGlyph, 0, 0); + } + return SetBitMask(bitmap, bmp_rect.left, bmp_rect.top, fill_color); + } + auto bitmap = pdfium::MakeRetain<CFX_DIBitmap>(); + if (m_bpp == 8) { + if (!bitmap->Create(pixel_width, pixel_height, FXDIB_8bppMask)) + return false; + } else { + if (!CreateCompatibleBitmap(bitmap, pixel_width, pixel_height)) + return false; + } + if (!bitmap->HasAlpha() && !bitmap->IsAlphaMask()) { + bitmap->Clear(0xFFFFFFFF); + if (!GetDIBits(bitmap, bmp_rect.left, bmp_rect.top)) + return false; + } else { + bitmap->Clear(0); + if (bitmap->m_pAlphaMask) + bitmap->m_pAlphaMask->Clear(0); + } + int dest_width = pixel_width; + int a = 0; + int r = 0; + int g = 0; + int b = 0; + if (anti_alias == FXFT_RENDER_MODE_LCD) + std::tie(a, r, g, b) = ArgbDecode(fill_color); + + for (const FXTEXT_GLYPHPOS& glyph : glyphs) { + if (!glyph.m_pGlyph) + continue; + + pdfium::base::CheckedNumeric<int> left = glyph.m_Origin.x; + left += glyph.m_pGlyph->m_Left; + left -= pixel_left; + if (!left.IsValid()) + return false; + + pdfium::base::CheckedNumeric<int> top = glyph.m_Origin.y; + top -= glyph.m_pGlyph->m_Top; + top -= pixel_top; + if (!top.IsValid()) + return false; + + CFX_RetainPtr<CFX_DIBitmap> pGlyph = glyph.m_pGlyph->m_pBitmap; + int ncols = pGlyph->GetWidth(); + int nrows = pGlyph->GetHeight(); + if (anti_alias == FXFT_RENDER_MODE_NORMAL) { + if (!bitmap->CompositeMask(left.ValueOrDie(), top.ValueOrDie(), ncols, + nrows, pGlyph, fill_color, 0, 0, + FXDIB_BLEND_NORMAL, nullptr, false, 0)) { + return false; + } + continue; + } + bool bBGRStripe = !!(text_flags & FXTEXT_BGR_STRIPE); + ncols /= 3; + int x_subpixel = static_cast<int>(glyph.m_fOrigin.x * 3) % 3; + int start_col = + pdfium::base::ValueOrDieForType<int>(pdfium::base::CheckMax(left, 0)); + pdfium::base::CheckedNumeric<int> end_col_safe = left; + end_col_safe += ncols; + if (!end_col_safe.IsValid()) + return false; + + int end_col = + std::min(static_cast<int>(end_col_safe.ValueOrDie<int>()), dest_width); + if (start_col >= end_col) + continue; + + DrawNormalTextHelper(bitmap, pGlyph, nrows, left.ValueOrDie(), + top.ValueOrDie(), start_col, end_col, bNormal, + bBGRStripe, x_subpixel, a, r, g, b); + } + if (bitmap->IsAlphaMask()) + SetBitMask(bitmap, bmp_rect.left, bmp_rect.top, fill_color); + else + SetDIBits(bitmap, bmp_rect.left, bmp_rect.top); + return true; +} + +bool CFX_RenderDevice::DrawTextPath(int nChars, + const FXTEXT_CHARPOS* pCharPos, + CFX_Font* pFont, + float font_size, + const CFX_Matrix* pText2User, + const CFX_Matrix* pUser2Device, + const CFX_GraphStateData* pGraphState, + uint32_t fill_color, + FX_ARGB stroke_color, + CFX_PathData* pClippingPath, + int nFlag) { + for (int iChar = 0; iChar < nChars; iChar++) { + const FXTEXT_CHARPOS& charpos = pCharPos[iChar]; + CFX_Matrix matrix; + if (charpos.m_bGlyphAdjust) { + matrix = CFX_Matrix(charpos.m_AdjustMatrix[0], charpos.m_AdjustMatrix[1], + charpos.m_AdjustMatrix[2], charpos.m_AdjustMatrix[3], + 0, 0); + } + matrix.Concat(CFX_Matrix(font_size, 0, 0, font_size, charpos.m_Origin.x, + charpos.m_Origin.y)); + const CFX_PathData* pPath = + pFont->LoadGlyphPath(charpos.m_GlyphIndex, charpos.m_FontCharWidth); + if (!pPath) + continue; + + matrix.Concat(*pText2User); + + CFX_PathData TransformedPath(*pPath); + TransformedPath.Transform(&matrix); + if (fill_color || stroke_color) { + int fill_mode = nFlag; + if (fill_color) + fill_mode |= FXFILL_WINDING; + fill_mode |= FX_FILL_TEXT_MODE; + if (!DrawPathWithBlend(&TransformedPath, pUser2Device, pGraphState, + fill_color, stroke_color, fill_mode, + FXDIB_BLEND_NORMAL)) { + return false; + } + } + if (pClippingPath) + pClippingPath->Append(&TransformedPath, pUser2Device); + } + return true; +} + +CFX_RenderDevice::StateRestorer::StateRestorer(CFX_RenderDevice* pDevice) + : m_pDevice(pDevice) { + m_pDevice->SaveState(); +} + +CFX_RenderDevice::StateRestorer::~StateRestorer() { + m_pDevice->RestoreState(false); +} |