| // Copyright 2014 The PDFium Authors |
| // 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/agg/fx_agg_driver.h" |
| |
| #include <math.h> |
| #include <stdint.h> |
| |
| #include <algorithm> |
| #include <utility> |
| |
| #include "build/build_config.h" |
| #include "core/fxcrt/check.h" |
| #include "core/fxcrt/check_op.h" |
| #include "core/fxcrt/fx_2d_size.h" |
| #include "core/fxcrt/fx_safe_types.h" |
| #include "core/fxcrt/notreached.h" |
| #include "core/fxcrt/span.h" |
| #include "core/fxcrt/unowned_ptr_exclusion.h" |
| #include "core/fxge/cfx_cliprgn.h" |
| #include "core/fxge/cfx_defaultrenderdevice.h" |
| #include "core/fxge/cfx_graphstatedata.h" |
| #include "core/fxge/cfx_path.h" |
| #include "core/fxge/dib/cfx_dibitmap.h" |
| #include "core/fxge/dib/cfx_imagerenderer.h" |
| #include "core/fxge/dib/cfx_imagestretcher.h" |
| |
| // Ignore fallthrough warnings in agg23 headers. |
| #if defined(__clang__) |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wimplicit-fallthrough" |
| #endif |
| #include "third_party/agg23/agg_clip_liang_barsky.h" |
| #include "third_party/agg23/agg_conv_dash.h" |
| #include "third_party/agg23/agg_conv_stroke.h" |
| #include "third_party/agg23/agg_curves.h" |
| #include "third_party/agg23/agg_path_storage.h" |
| #include "third_party/agg23/agg_pixfmt_gray.h" |
| #include "third_party/agg23/agg_rasterizer_scanline_aa.h" |
| #include "third_party/agg23/agg_renderer_scanline.h" |
| #include "third_party/agg23/agg_scanline_u.h" |
| #if defined(__clang__) |
| #pragma GCC diagnostic pop |
| #endif |
| |
| namespace pdfium { |
| namespace { |
| |
| const float kMaxPos = 32000.0f; |
| |
| CFX_PointF HardClip(const CFX_PointF& pos) { |
| return CFX_PointF(std::clamp(pos.x, -kMaxPos, kMaxPos), |
| std::clamp(pos.y, -kMaxPos, kMaxPos)); |
| } |
| |
| void RgbByteOrderCompositeRect(const RetainPtr<CFX_DIBitmap>& pBitmap, |
| int left, |
| int top, |
| int width, |
| int height, |
| FX_ARGB argb) { |
| int src_alpha = FXARGB_A(argb); |
| if (src_alpha == 0) |
| return; |
| |
| FX_RECT rect(left, top, left + width, top + height); |
| rect.Intersect(0, 0, pBitmap->GetWidth(), pBitmap->GetHeight()); |
| width = rect.Width(); |
| int src_r = FXARGB_R(argb); |
| int src_g = FXARGB_G(argb); |
| int src_b = FXARGB_B(argb); |
| int Bpp = pBitmap->GetBPP() / 8; |
| int dib_argb = FXARGB_TOBGRORDERDIB(argb); |
| pdfium::span<uint8_t> pBuffer = pBitmap->GetWritableBuffer(); |
| if (src_alpha == 255) { |
| for (int row = rect.top; row < rect.bottom; row++) { |
| uint8_t* dest_scan = |
| pBuffer.subspan(row * pBitmap->GetPitch() + rect.left * Bpp).data(); |
| if (Bpp == 4) { |
| std::fill_n(reinterpret_cast<uint32_t*>(dest_scan), width, dib_argb); |
| } else { |
| for (int col = 0; col < width; col++) { |
| *dest_scan++ = src_r; |
| *dest_scan++ = src_g; |
| *dest_scan++ = src_b; |
| } |
| } |
| } |
| return; |
| } |
| bool bAlpha = pBitmap->IsAlphaFormat(); |
| for (int row = rect.top; row < rect.bottom; row++) { |
| uint8_t* dest_scan = |
| pBuffer.subspan(row * pBitmap->GetPitch() + rect.left * Bpp).data(); |
| if (bAlpha) { |
| for (int col = 0; col < width; col++) { |
| uint8_t back_alpha = dest_scan[3]; |
| if (back_alpha == 0) { |
| FXARGB_SetRGBOrderDIB(dest_scan, argb); |
| dest_scan += 4; |
| continue; |
| } |
| uint8_t dest_alpha = |
| back_alpha + src_alpha - back_alpha * src_alpha / 255; |
| dest_scan[3] = dest_alpha; |
| int alpha_ratio = src_alpha * 255 / dest_alpha; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_r, alpha_ratio); |
| dest_scan++; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_g, alpha_ratio); |
| dest_scan++; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_b, alpha_ratio); |
| dest_scan += 2; |
| } |
| continue; |
| } |
| for (int col = 0; col < width; col++) { |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_r, src_alpha); |
| dest_scan++; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_g, src_alpha); |
| dest_scan++; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_b, src_alpha); |
| dest_scan++; |
| if (Bpp == 4) |
| dest_scan++; |
| } |
| } |
| } |
| |
| void RgbByteOrderTransferBitmap(RetainPtr<CFX_DIBitmap> pBitmap, |
| int width, |
| int height, |
| RetainPtr<const CFX_DIBBase> pSrcBitmap, |
| int src_left, |
| int src_top) { |
| int dest_left = 0; |
| int dest_top = 0; |
| if (!pBitmap->GetOverlapRect(dest_left, dest_top, width, height, |
| pSrcBitmap->GetWidth(), pSrcBitmap->GetHeight(), |
| src_left, src_top, nullptr)) { |
| return; |
| } |
| |
| const int Bpp = pBitmap->GetBPP() / 8; |
| const FXDIB_Format dest_format = pBitmap->GetFormat(); |
| const FXDIB_Format src_format = pSrcBitmap->GetFormat(); |
| const int dest_pitch = pBitmap->GetPitch(); |
| |
| const size_t dest_x_offset = Fx2DSizeOrDie(dest_left, Bpp); |
| const size_t dest_y_offset = Fx2DSizeOrDie(dest_top, dest_pitch); |
| |
| pdfium::span<uint8_t> dest_span = pBitmap->GetWritableBuffer() |
| .subspan(dest_y_offset) |
| .subspan(dest_x_offset); |
| if (dest_format == src_format) { |
| const size_t src_x_offset = Fx2DSizeOrDie(src_left, Bpp); |
| for (int row = 0; row < height; row++) { |
| uint8_t* dest_scan = dest_span.data(); |
| const uint8_t* src_scan = |
| pSrcBitmap->GetScanline(src_top + row).subspan(src_x_offset).data(); |
| if (Bpp == 4) { |
| for (int col = 0; col < width; col++) { |
| FXARGB_SetRGBOrderDIB(dest_scan, |
| *reinterpret_cast<const uint32_t*>(src_scan)); |
| dest_scan += 4; |
| src_scan += 4; |
| } |
| } else { |
| for (int col = 0; col < width; col++) { |
| *dest_scan++ = src_scan[2]; |
| *dest_scan++ = src_scan[1]; |
| *dest_scan++ = src_scan[0]; |
| src_scan += 3; |
| } |
| } |
| dest_span = dest_span.subspan(dest_pitch); |
| } |
| return; |
| } |
| |
| if (dest_format == FXDIB_Format::kRgb) { |
| DCHECK_EQ(src_format, FXDIB_Format::kRgb32); |
| const size_t src_x_offset = Fx2DSizeOrDie(src_left, 4); |
| for (int row = 0; row < height; row++) { |
| uint8_t* dest_scan = dest_span.data(); |
| const uint8_t* src_scan = |
| pSrcBitmap->GetScanline(src_top + row).subspan(src_x_offset).data(); |
| for (int col = 0; col < width; col++) { |
| *dest_scan++ = src_scan[2]; |
| *dest_scan++ = src_scan[1]; |
| *dest_scan++ = src_scan[0]; |
| src_scan += 4; |
| } |
| if (row < height - 1) { |
| // Since `dest_scan` was initialized in a way that takes `dest_x_offset` |
| // and `dest_y_offset` into account, it may go past the end of the span |
| // after processing the last row. |
| dest_span = dest_span.subspan(dest_pitch); |
| } |
| } |
| return; |
| } |
| |
| DCHECK(dest_format == FXDIB_Format::kArgb || |
| dest_format == FXDIB_Format::kRgb32); |
| if (src_format == FXDIB_Format::kRgb) { |
| const size_t src_x_offset = Fx2DSizeOrDie(src_left, 3); |
| for (int row = 0; row < height; row++) { |
| uint8_t* dest_scan = dest_span.data(); |
| const uint8_t* src_scan = |
| pSrcBitmap->GetScanline(src_top + row).subspan(src_x_offset).data(); |
| for (int col = 0; col < width; col++) { |
| FXARGB_SetDIB(dest_scan, |
| ArgbEncode(0xff, src_scan[0], src_scan[1], src_scan[2])); |
| dest_scan += 4; |
| src_scan += 3; |
| } |
| dest_span = dest_span.subspan(dest_pitch); |
| } |
| return; |
| } |
| if (src_format != FXDIB_Format::kRgb32) |
| return; |
| DCHECK_EQ(dest_format, FXDIB_Format::kArgb); |
| const size_t src_x_offset = Fx2DSizeOrDie(src_left, 4); |
| for (int row = 0; row < height; row++) { |
| uint8_t* dest_scan = dest_span.data(); |
| const uint8_t* src_scan = |
| pSrcBitmap->GetScanline(src_top + row).subspan(src_x_offset).data(); |
| for (int col = 0; col < width; col++) { |
| FXARGB_SetDIB(dest_scan, |
| ArgbEncode(0xff, src_scan[0], src_scan[1], src_scan[2])); |
| src_scan += 4; |
| dest_scan += 4; |
| } |
| dest_span = dest_span.subspan(dest_pitch); |
| } |
| } |
| |
| void RasterizeStroke(agg::rasterizer_scanline_aa* rasterizer, |
| agg::path_storage* path_data, |
| const CFX_Matrix* pObject2Device, |
| const CFX_GraphStateData* pGraphState, |
| float scale, |
| bool bTextMode) { |
| agg::line_cap_e cap; |
| switch (pGraphState->m_LineCap) { |
| case CFX_GraphStateData::LineCap::kRound: |
| cap = agg::round_cap; |
| break; |
| case CFX_GraphStateData::LineCap::kSquare: |
| cap = agg::square_cap; |
| break; |
| default: |
| cap = agg::butt_cap; |
| break; |
| } |
| agg::line_join_e join; |
| switch (pGraphState->m_LineJoin) { |
| case CFX_GraphStateData::LineJoin::kRound: |
| join = agg::round_join; |
| break; |
| case CFX_GraphStateData::LineJoin::kBevel: |
| join = agg::bevel_join; |
| break; |
| default: |
| join = agg::miter_join_revert; |
| break; |
| } |
| float width = pGraphState->m_LineWidth * scale; |
| float unit = 1.0f; |
| if (pObject2Device) { |
| unit = |
| 1.0f / ((pObject2Device->GetXUnit() + pObject2Device->GetYUnit()) / 2); |
| } |
| width = std::max(width, unit); |
| if (!pGraphState->m_DashArray.empty()) { |
| using DashConverter = agg::conv_dash<agg::path_storage>; |
| DashConverter dash(*path_data); |
| for (size_t i = 0; i < (pGraphState->m_DashArray.size() + 1) / 2; i++) { |
| float on = pGraphState->m_DashArray[i * 2]; |
| if (on <= 0.000001f) |
| on = 0.1f; |
| float off = i * 2 + 1 == pGraphState->m_DashArray.size() |
| ? on |
| : pGraphState->m_DashArray[i * 2 + 1]; |
| off = std::max(off, 0.0f); |
| dash.add_dash(on * scale, off * scale); |
| } |
| dash.dash_start(pGraphState->m_DashPhase * scale); |
| using DashStroke = agg::conv_stroke<DashConverter>; |
| DashStroke stroke(dash); |
| stroke.line_join(join); |
| stroke.line_cap(cap); |
| stroke.miter_limit(pGraphState->m_MiterLimit); |
| stroke.width(width); |
| rasterizer->add_path_transformed(stroke, pObject2Device); |
| return; |
| } |
| agg::conv_stroke<agg::path_storage> stroke(*path_data); |
| stroke.line_join(join); |
| stroke.line_cap(cap); |
| stroke.miter_limit(pGraphState->m_MiterLimit); |
| stroke.width(width); |
| rasterizer->add_path_transformed(stroke, pObject2Device); |
| } |
| |
| agg::filling_rule_e GetAlternateOrWindingFillType( |
| const CFX_FillRenderOptions& fill_options) { |
| return fill_options.fill_type == CFX_FillRenderOptions::FillType::kWinding |
| ? agg::fill_non_zero |
| : agg::fill_even_odd; |
| } |
| |
| RetainPtr<CFX_DIBitmap> GetClipMaskFromRegion(const CFX_ClipRgn* r) { |
| return (r && r->GetType() == CFX_ClipRgn::kMaskF) ? r->GetMask() : nullptr; |
| } |
| |
| FX_RECT GetClipBoxFromRegion(const RetainPtr<CFX_DIBitmap>& device, |
| const CFX_ClipRgn* region) { |
| if (region) |
| return region->GetBox(); |
| return FX_RECT(0, 0, device->GetWidth(), device->GetHeight()); |
| } |
| |
| class CFX_Renderer { |
| public: |
| CFX_Renderer(const RetainPtr<CFX_DIBitmap>& pDevice, |
| const RetainPtr<CFX_DIBitmap>& pBackdropDevice, |
| const CFX_ClipRgn* pClipRgn, |
| uint32_t color, |
| bool bFullCover, |
| bool bRgbByteOrder); |
| |
| // Needed for agg caller |
| void prepare(unsigned) {} |
| |
| template <class Scanline> |
| void render(const Scanline& sl); |
| |
| private: |
| using CompositeSpanFunc = void (CFX_Renderer::*)(uint8_t*, |
| int, |
| int, |
| int, |
| const uint8_t*, |
| int, |
| int, |
| const uint8_t*); |
| |
| void CompositeSpan(uint8_t* dest_scan, |
| const uint8_t* backdrop_scan, |
| int Bpp, |
| bool bDestAlpha, |
| int span_left, |
| int span_len, |
| const uint8_t* cover_scan, |
| int clip_left, |
| int clip_right, |
| const uint8_t* clip_scan); |
| |
| void CompositeSpan1bpp(uint8_t* dest_scan, |
| int Bpp, |
| int span_left, |
| int span_len, |
| const uint8_t* cover_scan, |
| int clip_left, |
| int clip_right, |
| const uint8_t* clip_scan); |
| |
| void CompositeSpanGray(uint8_t* dest_scan, |
| int Bpp, |
| int span_left, |
| int span_len, |
| const uint8_t* cover_scan, |
| int clip_left, |
| int clip_right, |
| const uint8_t* clip_scan); |
| |
| void CompositeSpanARGB(uint8_t* dest_scan, |
| int Bpp, |
| int span_left, |
| int span_len, |
| const uint8_t* cover_scan, |
| int clip_left, |
| int clip_right, |
| const uint8_t* clip_scan); |
| |
| void CompositeSpanRGB(uint8_t* dest_scan, |
| int Bpp, |
| int span_left, |
| int span_len, |
| const uint8_t* cover_scan, |
| int clip_left, |
| int clip_right, |
| const uint8_t* clip_scan); |
| |
| void CompositeSpan1bppHelper(uint8_t* dest_scan, |
| int col_start, |
| int col_end, |
| const uint8_t* cover_scan, |
| const uint8_t* clip_scan, |
| int span_left); |
| |
| static CompositeSpanFunc GetCompositeSpanFunc( |
| const RetainPtr<CFX_DIBitmap>& device) { |
| if (device->GetBPP() == 1) |
| return &CFX_Renderer::CompositeSpan1bpp; |
| if (device->GetBPP() == 8) |
| return &CFX_Renderer::CompositeSpanGray; |
| if (device->GetFormat() == FXDIB_Format::kArgb) |
| return &CFX_Renderer::CompositeSpanARGB; |
| return &CFX_Renderer::CompositeSpanRGB; |
| } |
| |
| inline int GetSrcAlpha(const uint8_t* clip_scan, int col) const { |
| return clip_scan ? m_Alpha * clip_scan[col] / 255 : m_Alpha; |
| } |
| |
| inline int GetSourceAlpha(const uint8_t* cover_scan, |
| const uint8_t* clip_scan, |
| int col) const { |
| return clip_scan ? m_Alpha * cover_scan[col] * clip_scan[col] / 255 / 255 |
| : m_Alpha * cover_scan[col] / 255; |
| } |
| |
| inline int GetColStart(int span_left, int clip_left) const { |
| return span_left < clip_left ? clip_left - span_left : 0; |
| } |
| |
| inline int GetColEnd(int span_left, int span_len, int clip_right) const { |
| return span_left + span_len < clip_right ? span_len |
| : clip_right - span_left; |
| } |
| |
| int m_Alpha; |
| int m_Red; |
| int m_Green; |
| int m_Blue; |
| int m_Gray; |
| const uint32_t m_Color; |
| const bool m_bFullCover; |
| const bool m_bRgbByteOrder; |
| const FX_RECT m_ClipBox; |
| RetainPtr<CFX_DIBitmap> const m_pBackdropDevice; |
| RetainPtr<CFX_DIBitmap> const m_pClipMask; |
| RetainPtr<CFX_DIBitmap> const m_pDevice; |
| UnownedPtr<const CFX_ClipRgn> m_pClipRgn; |
| const CompositeSpanFunc m_CompositeSpanFunc; |
| }; |
| |
| void CFX_Renderer::CompositeSpan(uint8_t* dest_scan, |
| const uint8_t* backdrop_scan, |
| int Bpp, |
| bool bDestAlpha, |
| int span_left, |
| int span_len, |
| const uint8_t* cover_scan, |
| int clip_left, |
| int clip_right, |
| const uint8_t* clip_scan) { |
| int col_start = GetColStart(span_left, clip_left); |
| int col_end = GetColEnd(span_left, span_len, clip_right); |
| if (Bpp) { |
| dest_scan += col_start * Bpp; |
| backdrop_scan += col_start * Bpp; |
| } else { |
| dest_scan += col_start / 8; |
| backdrop_scan += col_start / 8; |
| } |
| if (m_bRgbByteOrder) { |
| if (Bpp == 4 && bDestAlpha) { |
| for (int col = col_start; col < col_end; col++) { |
| int src_alpha = GetSrcAlpha(clip_scan, col); |
| uint8_t dest_alpha = |
| backdrop_scan[3] + src_alpha - backdrop_scan[3] * src_alpha / 255; |
| dest_scan[3] = dest_alpha; |
| int alpha_ratio = src_alpha * 255 / dest_alpha; |
| if (m_bFullCover) { |
| *dest_scan++ = |
| FXDIB_ALPHA_MERGE(*backdrop_scan++, m_Red, alpha_ratio); |
| *dest_scan++ = |
| FXDIB_ALPHA_MERGE(*backdrop_scan++, m_Green, alpha_ratio); |
| *dest_scan++ = |
| FXDIB_ALPHA_MERGE(*backdrop_scan++, m_Blue, alpha_ratio); |
| dest_scan++; |
| backdrop_scan++; |
| } else { |
| int r = FXDIB_ALPHA_MERGE(*backdrop_scan++, m_Red, alpha_ratio); |
| int g = FXDIB_ALPHA_MERGE(*backdrop_scan++, m_Green, alpha_ratio); |
| int b = FXDIB_ALPHA_MERGE(*backdrop_scan++, m_Blue, alpha_ratio); |
| backdrop_scan++; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, r, cover_scan[col]); |
| dest_scan++; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, g, cover_scan[col]); |
| dest_scan++; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, b, cover_scan[col]); |
| dest_scan += 2; |
| } |
| } |
| return; |
| } |
| if (Bpp == 3 || Bpp == 4) { |
| for (int col = col_start; col < col_end; col++) { |
| int src_alpha = GetSrcAlpha(clip_scan, col); |
| int r = FXDIB_ALPHA_MERGE(*backdrop_scan++, m_Red, src_alpha); |
| int g = FXDIB_ALPHA_MERGE(*backdrop_scan++, m_Green, src_alpha); |
| int b = FXDIB_ALPHA_MERGE(*backdrop_scan, m_Blue, src_alpha); |
| backdrop_scan += Bpp - 2; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, r, cover_scan[col]); |
| dest_scan++; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, g, cover_scan[col]); |
| dest_scan++; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, b, cover_scan[col]); |
| dest_scan += Bpp - 2; |
| } |
| } |
| return; |
| } |
| if (Bpp == 4 && bDestAlpha) { |
| for (int col = col_start; col < col_end; col++) { |
| int src_alpha = GetSrcAlpha(clip_scan, col); |
| int src_alpha_covered = src_alpha * cover_scan[col] / 255; |
| if (src_alpha_covered == 0) { |
| dest_scan += 4; |
| continue; |
| } |
| if (cover_scan[col] == 255) { |
| dest_scan[3] = src_alpha_covered; |
| *dest_scan++ = m_Blue; |
| *dest_scan++ = m_Green; |
| *dest_scan = m_Red; |
| dest_scan += 2; |
| continue; |
| } |
| if (dest_scan[3] == 0) { |
| dest_scan[3] = src_alpha_covered; |
| *dest_scan++ = m_Blue; |
| *dest_scan++ = m_Green; |
| *dest_scan = m_Red; |
| dest_scan += 2; |
| continue; |
| } |
| uint8_t cover = cover_scan[col]; |
| dest_scan[3] = FXDIB_ALPHA_MERGE(dest_scan[3], src_alpha, cover); |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, m_Blue, cover); |
| dest_scan++; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, m_Green, cover); |
| dest_scan++; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, m_Red, cover); |
| dest_scan += 2; |
| } |
| return; |
| } |
| if (Bpp == 3 || Bpp == 4) { |
| for (int col = col_start; col < col_end; col++) { |
| int src_alpha = GetSrcAlpha(clip_scan, col); |
| if (m_bFullCover) { |
| *dest_scan++ = FXDIB_ALPHA_MERGE(*backdrop_scan++, m_Blue, src_alpha); |
| *dest_scan++ = FXDIB_ALPHA_MERGE(*backdrop_scan++, m_Green, src_alpha); |
| *dest_scan = FXDIB_ALPHA_MERGE(*backdrop_scan, m_Red, src_alpha); |
| dest_scan += Bpp - 2; |
| backdrop_scan += Bpp - 2; |
| continue; |
| } |
| int b = FXDIB_ALPHA_MERGE(*backdrop_scan++, m_Blue, src_alpha); |
| int g = FXDIB_ALPHA_MERGE(*backdrop_scan++, m_Green, src_alpha); |
| int r = FXDIB_ALPHA_MERGE(*backdrop_scan, m_Red, src_alpha); |
| backdrop_scan += Bpp - 2; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, b, cover_scan[col]); |
| dest_scan++; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, g, cover_scan[col]); |
| dest_scan++; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, r, cover_scan[col]); |
| dest_scan += Bpp - 2; |
| } |
| return; |
| } |
| if (Bpp == 1) { |
| for (int col = col_start; col < col_end; col++) { |
| int src_alpha = GetSrcAlpha(clip_scan, col); |
| if (m_bFullCover) { |
| *dest_scan = FXDIB_ALPHA_MERGE(*backdrop_scan++, m_Gray, src_alpha); |
| continue; |
| } |
| int gray = FXDIB_ALPHA_MERGE(*backdrop_scan++, m_Gray, src_alpha); |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, gray, cover_scan[col]); |
| dest_scan++; |
| } |
| return; |
| } |
| CompositeSpan1bppHelper(dest_scan, col_start, col_end, cover_scan, clip_scan, |
| span_left); |
| } |
| |
| void CFX_Renderer::CompositeSpan1bpp(uint8_t* dest_scan, |
| int Bpp, |
| int span_left, |
| int span_len, |
| const uint8_t* cover_scan, |
| int clip_left, |
| int clip_right, |
| const uint8_t* clip_scan) { |
| DCHECK(!m_bRgbByteOrder); |
| int col_start = GetColStart(span_left, clip_left); |
| int col_end = GetColEnd(span_left, span_len, clip_right); |
| dest_scan += col_start / 8; |
| CompositeSpan1bppHelper(dest_scan, col_start, col_end, cover_scan, clip_scan, |
| span_left); |
| } |
| |
| void CFX_Renderer::CompositeSpanGray(uint8_t* dest_scan, |
| int Bpp, |
| int span_left, |
| int span_len, |
| const uint8_t* cover_scan, |
| int clip_left, |
| int clip_right, |
| const uint8_t* clip_scan) { |
| DCHECK(!m_bRgbByteOrder); |
| int col_start = GetColStart(span_left, clip_left); |
| int col_end = GetColEnd(span_left, span_len, clip_right); |
| dest_scan += col_start; |
| for (int col = col_start; col < col_end; col++) { |
| int src_alpha = GetSourceAlpha(cover_scan, clip_scan, col); |
| if (src_alpha) { |
| if (src_alpha == 255) |
| *dest_scan = m_Gray; |
| else |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, m_Gray, src_alpha); |
| } |
| dest_scan++; |
| } |
| } |
| |
| void CFX_Renderer::CompositeSpanARGB(uint8_t* dest_scan, |
| int Bpp, |
| int span_left, |
| int span_len, |
| const uint8_t* cover_scan, |
| int clip_left, |
| int clip_right, |
| const uint8_t* clip_scan) { |
| int col_start = GetColStart(span_left, clip_left); |
| int col_end = GetColEnd(span_left, span_len, clip_right); |
| dest_scan += col_start * Bpp; |
| if (m_bRgbByteOrder) { |
| for (int col = col_start; col < col_end; col++) { |
| int src_alpha = m_bFullCover ? GetSrcAlpha(clip_scan, col) |
| : GetSourceAlpha(cover_scan, clip_scan, col); |
| if (src_alpha) { |
| if (src_alpha == 255) { |
| *(reinterpret_cast<uint32_t*>(dest_scan)) = m_Color; |
| } else { |
| uint8_t dest_alpha = |
| dest_scan[3] + src_alpha - dest_scan[3] * src_alpha / 255; |
| dest_scan[3] = dest_alpha; |
| int alpha_ratio = src_alpha * 255 / dest_alpha; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, m_Red, alpha_ratio); |
| dest_scan++; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, m_Green, alpha_ratio); |
| dest_scan++; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, m_Blue, alpha_ratio); |
| dest_scan += 2; |
| continue; |
| } |
| } |
| dest_scan += 4; |
| } |
| return; |
| } |
| for (int col = col_start; col < col_end; col++) { |
| int src_alpha = m_bFullCover ? GetSrcAlpha(clip_scan, col) |
| : GetSourceAlpha(cover_scan, clip_scan, col); |
| if (src_alpha) { |
| if (src_alpha == 255) { |
| *(reinterpret_cast<uint32_t*>(dest_scan)) = m_Color; |
| } else { |
| if (dest_scan[3] == 0) { |
| dest_scan[3] = src_alpha; |
| *dest_scan++ = m_Blue; |
| *dest_scan++ = m_Green; |
| *dest_scan = m_Red; |
| dest_scan += 2; |
| continue; |
| } |
| uint8_t dest_alpha = |
| dest_scan[3] + src_alpha - dest_scan[3] * src_alpha / 255; |
| dest_scan[3] = dest_alpha; |
| int alpha_ratio = src_alpha * 255 / dest_alpha; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, m_Blue, alpha_ratio); |
| dest_scan++; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, m_Green, alpha_ratio); |
| dest_scan++; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, m_Red, alpha_ratio); |
| dest_scan += 2; |
| continue; |
| } |
| } |
| dest_scan += Bpp; |
| } |
| } |
| |
| void CFX_Renderer::CompositeSpanRGB(uint8_t* dest_scan, |
| int Bpp, |
| int span_left, |
| int span_len, |
| const uint8_t* cover_scan, |
| int clip_left, |
| int clip_right, |
| const uint8_t* clip_scan) { |
| int col_start = GetColStart(span_left, clip_left); |
| int col_end = GetColEnd(span_left, span_len, clip_right); |
| dest_scan += col_start * Bpp; |
| if (m_bRgbByteOrder) { |
| for (int col = col_start; col < col_end; col++) { |
| int src_alpha = GetSourceAlpha(cover_scan, clip_scan, col); |
| if (src_alpha) { |
| if (src_alpha == 255) { |
| if (Bpp == 4) { |
| *(uint32_t*)dest_scan = m_Color; |
| } else if (Bpp == 3) { |
| *dest_scan++ = m_Red; |
| *dest_scan++ = m_Green; |
| *dest_scan++ = m_Blue; |
| continue; |
| } |
| } else { |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, m_Red, src_alpha); |
| dest_scan++; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, m_Green, src_alpha); |
| dest_scan++; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, m_Blue, src_alpha); |
| dest_scan += Bpp - 2; |
| continue; |
| } |
| } |
| dest_scan += Bpp; |
| } |
| return; |
| } |
| for (int col = col_start; col < col_end; col++) { |
| int src_alpha = m_bFullCover ? GetSrcAlpha(clip_scan, col) |
| : GetSourceAlpha(cover_scan, clip_scan, col); |
| if (src_alpha) { |
| if (src_alpha == 255) { |
| if (Bpp == 4) { |
| *(uint32_t*)dest_scan = m_Color; |
| } else if (Bpp == 3) { |
| *dest_scan++ = m_Blue; |
| *dest_scan++ = m_Green; |
| *dest_scan++ = m_Red; |
| continue; |
| } |
| } else { |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, m_Blue, src_alpha); |
| dest_scan++; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, m_Green, src_alpha); |
| dest_scan++; |
| *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, m_Red, src_alpha); |
| dest_scan += Bpp - 2; |
| continue; |
| } |
| } |
| dest_scan += Bpp; |
| } |
| } |
| |
| CFX_Renderer::CFX_Renderer(const RetainPtr<CFX_DIBitmap>& pDevice, |
| const RetainPtr<CFX_DIBitmap>& pBackdropDevice, |
| const CFX_ClipRgn* pClipRgn, |
| uint32_t color, |
| bool bFullCover, |
| bool bRgbByteOrder) |
| : m_Alpha(FXARGB_A(color)), |
| m_Color(bRgbByteOrder ? FXARGB_TOBGRORDERDIB(color) : color), |
| m_bFullCover(bFullCover), |
| m_bRgbByteOrder(bRgbByteOrder), |
| m_ClipBox(GetClipBoxFromRegion(pDevice, pClipRgn)), |
| m_pBackdropDevice(pBackdropDevice), |
| m_pClipMask(GetClipMaskFromRegion(pClipRgn)), |
| m_pDevice(pDevice), |
| m_pClipRgn(pClipRgn), |
| m_CompositeSpanFunc(GetCompositeSpanFunc(m_pDevice)) { |
| if (m_pDevice->GetBPP() == 8) { |
| DCHECK(!m_bRgbByteOrder); |
| if (m_pDevice->IsMaskFormat()) |
| m_Gray = 255; |
| else |
| m_Gray = FXRGB2GRAY(FXARGB_R(color), FXARGB_G(color), FXARGB_B(color)); |
| return; |
| } |
| |
| std::tie(m_Alpha, m_Red, m_Green, m_Blue) = ArgbDecode(color); |
| } |
| |
| template <class Scanline> |
| void CFX_Renderer::render(const Scanline& sl) { |
| int y = sl.y(); |
| if (y < m_ClipBox.top || y >= m_ClipBox.bottom) |
| return; |
| |
| uint8_t* dest_scan = |
| m_pDevice->GetWritableBuffer().subspan(m_pDevice->GetPitch() * y).data(); |
| const uint8_t* backdrop_scan = nullptr; |
| if (m_pBackdropDevice) { |
| backdrop_scan = m_pBackdropDevice->GetBuffer() |
| .subspan(m_pBackdropDevice->GetPitch() * y) |
| .data(); |
| } |
| int Bpp = m_pDevice->GetBPP() / 8; |
| bool bDestAlpha = m_pDevice->IsAlphaFormat() || m_pDevice->IsMaskFormat(); |
| unsigned num_spans = sl.num_spans(); |
| typename Scanline::const_iterator span = sl.begin(); |
| while (true) { |
| if (span->len <= 0) |
| break; |
| |
| int x = span->x; |
| uint8_t* dest_pos = nullptr; |
| const uint8_t* backdrop_pos = nullptr; |
| if (Bpp) { |
| backdrop_pos = backdrop_scan ? backdrop_scan + x * Bpp : nullptr; |
| dest_pos = dest_scan + x * Bpp; |
| } else { |
| dest_pos = dest_scan + x / 8; |
| backdrop_pos = backdrop_scan ? backdrop_scan + x / 8 : nullptr; |
| } |
| const uint8_t* clip_pos = nullptr; |
| if (m_pClipMask) { |
| // TODO(crbug.com/1382604): use subspan arithmetic. |
| clip_pos = m_pClipMask->GetBuffer().data() + |
| (y - m_ClipBox.top) * m_pClipMask->GetPitch() + x - |
| m_ClipBox.left; |
| } |
| if (backdrop_pos) { |
| CompositeSpan(dest_pos, backdrop_pos, Bpp, bDestAlpha, x, span->len, |
| span->covers, m_ClipBox.left, m_ClipBox.right, clip_pos); |
| } else { |
| (this->*m_CompositeSpanFunc)(dest_pos, Bpp, x, span->len, span->covers, |
| m_ClipBox.left, m_ClipBox.right, clip_pos); |
| } |
| if (--num_spans == 0) |
| break; |
| |
| ++span; |
| } |
| } |
| |
| void CFX_Renderer::CompositeSpan1bppHelper(uint8_t* dest_scan, |
| int col_start, |
| int col_end, |
| const uint8_t* cover_scan, |
| const uint8_t* clip_scan, |
| int span_left) { |
| int index = 0; |
| if (m_pDevice->HasPalette()) { |
| for (int i = 0; i < 2; i++) { |
| if (m_pDevice->GetPaletteSpan()[i] == m_Color) |
| index = i; |
| } |
| } else { |
| index = (static_cast<uint8_t>(m_Color) == 0xff) ? 1 : 0; |
| } |
| uint8_t* dest_scan1 = dest_scan; |
| for (int col = col_start; col < col_end; col++) { |
| int src_alpha = GetSourceAlpha(cover_scan, clip_scan, col); |
| if (src_alpha) { |
| if (!index) |
| *dest_scan1 &= ~(1 << (7 - (col + span_left) % 8)); |
| else |
| *dest_scan1 |= 1 << (7 - (col + span_left) % 8); |
| } |
| dest_scan1 = dest_scan + (span_left % 8 + col - col_start + 1) / 8; |
| } |
| } |
| |
| template <class BaseRenderer> |
| class RendererScanLineAaOffset { |
| public: |
| typedef BaseRenderer base_ren_type; |
| typedef typename base_ren_type::color_type color_type; |
| RendererScanLineAaOffset(base_ren_type& ren, unsigned left, unsigned top) |
| : m_ren(&ren), m_left(left), m_top(top) {} |
| void color(const color_type& c) { m_color = c; } |
| const color_type& color() const { return m_color; } |
| void prepare(unsigned) {} |
| template <class Scanline> |
| void render(const Scanline& sl) { |
| int y = sl.y(); |
| unsigned num_spans = sl.num_spans(); |
| typename Scanline::const_iterator span = sl.begin(); |
| while (true) { |
| int x = span->x; |
| if (span->len > 0) { |
| m_ren->blend_solid_hspan(x - m_left, y - m_top, (unsigned)span->len, |
| m_color, span->covers); |
| } else { |
| m_ren->blend_hline(x - m_left, y - m_top, (unsigned)(x - span->len - 1), |
| m_color, *(span->covers)); |
| } |
| if (--num_spans == 0) |
| break; |
| |
| ++span; |
| } |
| } |
| |
| private: |
| UNOWNED_PTR_EXCLUSION base_ren_type* m_ren; |
| color_type m_color; |
| unsigned m_left; |
| unsigned m_top; |
| }; |
| |
| agg::path_storage BuildAggPath(const CFX_Path& path, |
| const CFX_Matrix* pObject2Device) { |
| agg::path_storage agg_path; |
| pdfium::span<const CFX_Path::Point> points = path.GetPoints(); |
| for (size_t i = 0; i < points.size(); ++i) { |
| CFX_PointF pos = points[i].m_Point; |
| if (pObject2Device) |
| pos = pObject2Device->Transform(pos); |
| |
| pos = HardClip(pos); |
| CFX_Path::Point::Type point_type = points[i].m_Type; |
| if (point_type == CFX_Path::Point::Type::kMove) { |
| agg_path.move_to(pos.x, pos.y); |
| } else if (point_type == CFX_Path::Point::Type::kLine) { |
| if (i > 0 && points[i - 1].IsTypeAndOpen(CFX_Path::Point::Type::kMove) && |
| (i + 1 == points.size() || |
| points[i + 1].IsTypeAndOpen(CFX_Path::Point::Type::kMove)) && |
| points[i].m_Point == points[i - 1].m_Point) { |
| pos.x += 1; |
| } |
| agg_path.line_to(pos.x, pos.y); |
| } else if (point_type == CFX_Path::Point::Type::kBezier) { |
| if (i > 0 && i + 2 < points.size()) { |
| CFX_PointF pos0 = points[i - 1].m_Point; |
| CFX_PointF pos2 = points[i + 1].m_Point; |
| CFX_PointF pos3 = points[i + 2].m_Point; |
| if (pObject2Device) { |
| pos0 = pObject2Device->Transform(pos0); |
| pos2 = pObject2Device->Transform(pos2); |
| pos3 = pObject2Device->Transform(pos3); |
| } |
| pos0 = HardClip(pos0); |
| pos2 = HardClip(pos2); |
| pos3 = HardClip(pos3); |
| agg::curve4 curve(pos0.x, pos0.y, pos.x, pos.y, pos2.x, pos2.y, pos3.x, |
| pos3.y); |
| i += 2; |
| agg_path.add_path(curve); |
| } |
| } |
| if (points[i].m_CloseFigure) |
| agg_path.end_poly(); |
| } |
| return agg_path; |
| } |
| |
| } // namespace |
| |
| CFX_AggDeviceDriver::CFX_AggDeviceDriver( |
| RetainPtr<CFX_DIBitmap> pBitmap, |
| bool bRgbByteOrder, |
| RetainPtr<CFX_DIBitmap> pBackdropBitmap, |
| bool bGroupKnockout) |
| : m_pBitmap(std::move(pBitmap)), |
| m_bRgbByteOrder(bRgbByteOrder), |
| m_bGroupKnockout(bGroupKnockout), |
| m_pBackdropBitmap(std::move(pBackdropBitmap)) { |
| DCHECK(m_pBitmap); |
| DCHECK_NE(m_pBitmap->GetFormat(), FXDIB_Format::k1bppMask); |
| DCHECK_NE(m_pBitmap->GetFormat(), FXDIB_Format::k1bppRgb); |
| InitPlatform(); |
| } |
| |
| CFX_AggDeviceDriver::~CFX_AggDeviceDriver() { |
| DestroyPlatform(); |
| } |
| |
| #if !BUILDFLAG(IS_APPLE) |
| void CFX_AggDeviceDriver::InitPlatform() {} |
| |
| void CFX_AggDeviceDriver::DestroyPlatform() {} |
| |
| bool CFX_AggDeviceDriver::DrawDeviceText( |
| pdfium::span<const TextCharPos> pCharPos, |
| CFX_Font* pFont, |
| const CFX_Matrix& mtObject2Device, |
| float font_size, |
| uint32_t color, |
| const CFX_TextRenderOptions& options) { |
| return false; |
| } |
| #endif // !BUILDFLAG(IS_APPLE) |
| |
| DeviceType CFX_AggDeviceDriver::GetDeviceType() const { |
| return DeviceType::kDisplay; |
| } |
| |
| int CFX_AggDeviceDriver::GetDeviceCaps(int caps_id) const { |
| switch (caps_id) { |
| case FXDC_PIXEL_WIDTH: |
| return m_pBitmap->GetWidth(); |
| case FXDC_PIXEL_HEIGHT: |
| return m_pBitmap->GetHeight(); |
| case FXDC_BITS_PIXEL: |
| return m_pBitmap->GetBPP(); |
| case FXDC_HORZ_SIZE: |
| case FXDC_VERT_SIZE: |
| return 0; |
| case FXDC_RENDER_CAPS: { |
| int flags = FXRC_GET_BITS | FXRC_ALPHA_PATH | FXRC_ALPHA_IMAGE | |
| FXRC_BLEND_MODE | FXRC_SOFT_CLIP; |
| if (m_pBitmap->IsAlphaFormat()) { |
| flags |= FXRC_ALPHA_OUTPUT; |
| } else if (m_pBitmap->IsMaskFormat()) { |
| CHECK_NE(m_pBitmap->GetBPP(), 1); // Matches format CHECKs in the ctor. |
| flags |= FXRC_BYTEMASK_OUTPUT; |
| } |
| return flags; |
| } |
| default: |
| NOTREACHED_NORETURN(); |
| } |
| } |
| |
| void CFX_AggDeviceDriver::SaveState() { |
| std::unique_ptr<CFX_ClipRgn> pClip; |
| if (m_pClipRgn) |
| pClip = std::make_unique<CFX_ClipRgn>(*m_pClipRgn); |
| m_StateStack.push_back(std::move(pClip)); |
| } |
| |
| void CFX_AggDeviceDriver::RestoreState(bool bKeepSaved) { |
| m_pClipRgn.reset(); |
| |
| if (m_StateStack.empty()) |
| return; |
| |
| if (bKeepSaved) { |
| if (m_StateStack.back()) |
| m_pClipRgn = std::make_unique<CFX_ClipRgn>(*m_StateStack.back()); |
| } else { |
| m_pClipRgn = std::move(m_StateStack.back()); |
| m_StateStack.pop_back(); |
| } |
| } |
| |
| void CFX_AggDeviceDriver::SetClipMask(agg::rasterizer_scanline_aa& rasterizer) { |
| FX_RECT path_rect(rasterizer.min_x(), rasterizer.min_y(), |
| rasterizer.max_x() + 1, rasterizer.max_y() + 1); |
| path_rect.Intersect(m_pClipRgn->GetBox()); |
| if (path_rect.IsEmpty()) { |
| return; |
| } |
| auto pThisLayer = pdfium::MakeRetain<CFX_DIBitmap>(); |
| CHECK(pThisLayer->Create(path_rect.Width(), path_rect.Height(), |
| FXDIB_Format::k8bppMask)); |
| agg::rendering_buffer raw_buf(pThisLayer->GetWritableBuffer().data(), |
| pThisLayer->GetWidth(), pThisLayer->GetHeight(), |
| pThisLayer->GetPitch()); |
| agg::pixfmt_gray8 pixel_buf(raw_buf); |
| agg::renderer_base<agg::pixfmt_gray8> base_buf(pixel_buf); |
| RendererScanLineAaOffset<agg::renderer_base<agg::pixfmt_gray8>> final_render( |
| base_buf, path_rect.left, path_rect.top); |
| final_render.color(agg::gray8(255)); |
| agg::scanline_u8 scanline; |
| agg::render_scanlines(rasterizer, scanline, final_render, |
| m_FillOptions.aliased_path); |
| m_pClipRgn->IntersectMaskF(path_rect.left, path_rect.top, |
| std::move(pThisLayer)); |
| } |
| |
| bool CFX_AggDeviceDriver::SetClip_PathFill( |
| const CFX_Path& path, |
| const CFX_Matrix* pObject2Device, |
| const CFX_FillRenderOptions& fill_options) { |
| DCHECK(fill_options.fill_type != CFX_FillRenderOptions::FillType::kNoFill); |
| |
| m_FillOptions = fill_options; |
| if (!m_pClipRgn) { |
| m_pClipRgn = std::make_unique<CFX_ClipRgn>( |
| GetDeviceCaps(FXDC_PIXEL_WIDTH), GetDeviceCaps(FXDC_PIXEL_HEIGHT)); |
| } |
| std::optional<CFX_FloatRect> maybe_rectf = path.GetRect(pObject2Device); |
| if (maybe_rectf.has_value()) { |
| CFX_FloatRect& rectf = maybe_rectf.value(); |
| rectf.Intersect( |
| CFX_FloatRect(0, 0, static_cast<float>(GetDeviceCaps(FXDC_PIXEL_WIDTH)), |
| static_cast<float>(GetDeviceCaps(FXDC_PIXEL_HEIGHT)))); |
| FX_RECT rect = rectf.GetOuterRect(); |
| m_pClipRgn->IntersectRect(rect); |
| return true; |
| } |
| agg::path_storage path_data = BuildAggPath(path, pObject2Device); |
| path_data.end_poly(); |
| agg::rasterizer_scanline_aa rasterizer; |
| rasterizer.clip_box(0.0f, 0.0f, |
| static_cast<float>(GetDeviceCaps(FXDC_PIXEL_WIDTH)), |
| static_cast<float>(GetDeviceCaps(FXDC_PIXEL_HEIGHT))); |
| rasterizer.add_path(path_data); |
| rasterizer.filling_rule(GetAlternateOrWindingFillType(fill_options)); |
| SetClipMask(rasterizer); |
| return true; |
| } |
| |
| bool CFX_AggDeviceDriver::SetClip_PathStroke( |
| const CFX_Path& path, |
| const CFX_Matrix* pObject2Device, |
| const CFX_GraphStateData* pGraphState) { |
| if (!m_pClipRgn) { |
| m_pClipRgn = std::make_unique<CFX_ClipRgn>( |
| GetDeviceCaps(FXDC_PIXEL_WIDTH), GetDeviceCaps(FXDC_PIXEL_HEIGHT)); |
| } |
| agg::path_storage path_data = BuildAggPath(path, nullptr); |
| agg::rasterizer_scanline_aa rasterizer; |
| rasterizer.clip_box(0.0f, 0.0f, |
| static_cast<float>(GetDeviceCaps(FXDC_PIXEL_WIDTH)), |
| static_cast<float>(GetDeviceCaps(FXDC_PIXEL_HEIGHT))); |
| RasterizeStroke(&rasterizer, &path_data, pObject2Device, pGraphState, 1.0f, |
| false); |
| rasterizer.filling_rule(agg::fill_non_zero); |
| SetClipMask(rasterizer); |
| return true; |
| } |
| |
| int CFX_AggDeviceDriver::GetDriverType() const { |
| return 1; |
| } |
| |
| bool CFX_AggDeviceDriver::MultiplyAlpha(float alpha) { |
| return m_pBitmap->MultiplyAlpha(alpha); |
| } |
| |
| bool CFX_AggDeviceDriver::MultiplyAlphaMask( |
| RetainPtr<const CFX_DIBitmap> mask) { |
| return m_pBitmap->MultiplyAlphaMask(std::move(mask)); |
| } |
| |
| void CFX_AggDeviceDriver::Clear(uint32_t color) { |
| m_pBitmap->Clear(color); |
| } |
| |
| void CFX_AggDeviceDriver::RenderRasterizer( |
| agg::rasterizer_scanline_aa& rasterizer, |
| uint32_t color, |
| bool bFullCover, |
| bool bGroupKnockout) { |
| RetainPtr<CFX_DIBitmap> pt = bGroupKnockout ? m_pBackdropBitmap : nullptr; |
| CFX_Renderer render(m_pBitmap, pt, m_pClipRgn.get(), color, bFullCover, |
| m_bRgbByteOrder); |
| agg::scanline_u8 scanline; |
| agg::render_scanlines(rasterizer, scanline, render, |
| m_FillOptions.aliased_path); |
| } |
| |
| bool CFX_AggDeviceDriver::DrawPath(const CFX_Path& path, |
| const CFX_Matrix* pObject2Device, |
| 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; |
| |
| if (m_pBitmap->GetBuffer().empty()) |
| return true; |
| |
| m_FillOptions = fill_options; |
| if (fill_options.fill_type != CFX_FillRenderOptions::FillType::kNoFill && |
| fill_color) { |
| agg::path_storage path_data = BuildAggPath(path, pObject2Device); |
| agg::rasterizer_scanline_aa rasterizer; |
| rasterizer.clip_box(0.0f, 0.0f, |
| static_cast<float>(GetDeviceCaps(FXDC_PIXEL_WIDTH)), |
| static_cast<float>(GetDeviceCaps(FXDC_PIXEL_HEIGHT))); |
| rasterizer.add_path(path_data); |
| rasterizer.filling_rule(GetAlternateOrWindingFillType(fill_options)); |
| RenderRasterizer(rasterizer, fill_color, fill_options.full_cover, |
| /*bGroupKnockout=*/false); |
| } |
| int stroke_alpha = FXARGB_A(stroke_color); |
| if (!pGraphState || !stroke_alpha) |
| return true; |
| |
| if (fill_options.zero_area) { |
| agg::path_storage path_data = BuildAggPath(path, pObject2Device); |
| agg::rasterizer_scanline_aa rasterizer; |
| rasterizer.clip_box(0.0f, 0.0f, |
| static_cast<float>(GetDeviceCaps(FXDC_PIXEL_WIDTH)), |
| static_cast<float>(GetDeviceCaps(FXDC_PIXEL_HEIGHT))); |
| RasterizeStroke(&rasterizer, &path_data, nullptr, pGraphState, 1, |
| fill_options.stroke_text_mode); |
| RenderRasterizer(rasterizer, stroke_color, fill_options.full_cover, |
| m_bGroupKnockout); |
| return true; |
| } |
| CFX_Matrix matrix1; |
| CFX_Matrix matrix2; |
| if (pObject2Device) { |
| matrix1.a = std::max(fabs(pObject2Device->a), fabs(pObject2Device->b)); |
| matrix1.d = matrix1.a; |
| matrix2 = CFX_Matrix( |
| pObject2Device->a / matrix1.a, pObject2Device->b / matrix1.a, |
| pObject2Device->c / matrix1.d, pObject2Device->d / matrix1.d, 0, 0); |
| |
| matrix1 = *pObject2Device * matrix2.GetInverse(); |
| } |
| |
| agg::path_storage path_data = BuildAggPath(path, &matrix1); |
| agg::rasterizer_scanline_aa rasterizer; |
| rasterizer.clip_box(0.0f, 0.0f, |
| static_cast<float>(GetDeviceCaps(FXDC_PIXEL_WIDTH)), |
| static_cast<float>(GetDeviceCaps(FXDC_PIXEL_HEIGHT))); |
| RasterizeStroke(&rasterizer, &path_data, &matrix2, pGraphState, matrix1.a, |
| fill_options.stroke_text_mode); |
| RenderRasterizer(rasterizer, stroke_color, fill_options.full_cover, |
| m_bGroupKnockout); |
| return true; |
| } |
| |
| bool CFX_AggDeviceDriver::FillRectWithBlend(const FX_RECT& rect, |
| uint32_t fill_color, |
| BlendMode blend_type) { |
| if (blend_type != BlendMode::kNormal) |
| return false; |
| |
| if (m_pBitmap->GetBuffer().empty()) |
| return true; |
| |
| FX_RECT clip_rect; |
| GetClipBox(&clip_rect); |
| FX_RECT draw_rect = clip_rect; |
| draw_rect.Intersect(rect); |
| if (draw_rect.IsEmpty()) |
| return true; |
| |
| if (!m_pClipRgn || m_pClipRgn->GetType() == CFX_ClipRgn::kRectI) { |
| if (m_bRgbByteOrder) { |
| RgbByteOrderCompositeRect(m_pBitmap, draw_rect.left, draw_rect.top, |
| draw_rect.Width(), draw_rect.Height(), |
| fill_color); |
| } else { |
| m_pBitmap->CompositeRect(draw_rect.left, draw_rect.top, draw_rect.Width(), |
| draw_rect.Height(), fill_color); |
| } |
| return true; |
| } |
| m_pBitmap->CompositeMask(draw_rect.left, draw_rect.top, draw_rect.Width(), |
| draw_rect.Height(), m_pClipRgn->GetMask(), |
| fill_color, draw_rect.left - clip_rect.left, |
| draw_rect.top - clip_rect.top, BlendMode::kNormal, |
| nullptr, m_bRgbByteOrder); |
| return true; |
| } |
| |
| bool CFX_AggDeviceDriver::GetClipBox(FX_RECT* pRect) { |
| if (!m_pClipRgn) { |
| pRect->left = pRect->top = 0; |
| pRect->right = GetDeviceCaps(FXDC_PIXEL_WIDTH); |
| pRect->bottom = GetDeviceCaps(FXDC_PIXEL_HEIGHT); |
| return true; |
| } |
| *pRect = m_pClipRgn->GetBox(); |
| return true; |
| } |
| |
| bool CFX_AggDeviceDriver::GetDIBits(RetainPtr<CFX_DIBitmap> bitmap, |
| int left, |
| int top) { |
| if (m_pBitmap->GetBuffer().empty()) |
| return true; |
| |
| FX_RECT rect(left, top, left + bitmap->GetWidth(), top + bitmap->GetHeight()); |
| RetainPtr<CFX_DIBitmap> pBack; |
| if (m_pBackdropBitmap) { |
| pBack = m_pBackdropBitmap->ClipTo(rect); |
| if (!pBack) |
| return true; |
| |
| pBack->CompositeBitmap(0, 0, pBack->GetWidth(), pBack->GetHeight(), |
| m_pBitmap, 0, 0, BlendMode::kNormal, nullptr, false); |
| } else { |
| pBack = m_pBitmap->ClipTo(rect); |
| if (!pBack) |
| return true; |
| } |
| |
| left = std::min(left, 0); |
| top = std::min(top, 0); |
| if (m_bRgbByteOrder) { |
| RgbByteOrderTransferBitmap(std::move(bitmap), rect.Width(), rect.Height(), |
| std::move(pBack), left, top); |
| return true; |
| } |
| return bitmap->TransferBitmap(0, 0, rect.Width(), rect.Height(), |
| std::move(pBack), left, top); |
| } |
| |
| RetainPtr<CFX_DIBitmap> CFX_AggDeviceDriver::GetBackDrop() { |
| return m_pBackdropBitmap; |
| } |
| |
| bool CFX_AggDeviceDriver::SetDIBits(RetainPtr<const CFX_DIBBase> bitmap, |
| uint32_t argb, |
| const FX_RECT& src_rect, |
| int left, |
| int top, |
| BlendMode blend_type) { |
| if (m_pBitmap->GetBuffer().empty()) |
| return true; |
| |
| if (bitmap->IsMaskFormat()) { |
| return m_pBitmap->CompositeMask(left, top, src_rect.Width(), |
| src_rect.Height(), std::move(bitmap), argb, |
| src_rect.left, src_rect.top, blend_type, |
| m_pClipRgn.get(), m_bRgbByteOrder); |
| } |
| return m_pBitmap->CompositeBitmap(left, top, src_rect.Width(), |
| src_rect.Height(), std::move(bitmap), |
| src_rect.left, src_rect.top, blend_type, |
| m_pClipRgn.get(), m_bRgbByteOrder); |
| } |
| |
| bool CFX_AggDeviceDriver::StretchDIBits(RetainPtr<const CFX_DIBBase> bitmap, |
| uint32_t argb, |
| int dest_left, |
| int dest_top, |
| int dest_width, |
| int dest_height, |
| const FX_RECT* pClipRect, |
| const FXDIB_ResampleOptions& options, |
| BlendMode blend_type) { |
| if (m_pBitmap->GetBuffer().empty()) |
| return true; |
| |
| if (dest_width == bitmap->GetWidth() && dest_height == bitmap->GetHeight()) { |
| FX_RECT rect(0, 0, dest_width, dest_height); |
| return SetDIBits(std::move(bitmap), argb, rect, dest_left, dest_top, |
| blend_type); |
| } |
| FX_RECT dest_rect(dest_left, dest_top, dest_left + dest_width, |
| dest_top + dest_height); |
| dest_rect.Normalize(); |
| FX_RECT dest_clip = dest_rect; |
| dest_clip.Intersect(*pClipRect); |
| CFX_BitmapComposer composer; |
| composer.Compose(m_pBitmap, m_pClipRgn.get(), /*alpha=*/1.0f, argb, dest_clip, |
| /*bVertical=*/false, /*bFlipX=*/false, /*bFlipY=*/false, |
| m_bRgbByteOrder, blend_type); |
| dest_clip.Offset(-dest_rect.left, -dest_rect.top); |
| CFX_ImageStretcher stretcher(&composer, std::move(bitmap), dest_width, |
| dest_height, dest_clip, options); |
| if (stretcher.Start()) |
| stretcher.Continue(nullptr); |
| return true; |
| } |
| |
| bool CFX_AggDeviceDriver::StartDIBits( |
| RetainPtr<const CFX_DIBBase> bitmap, |
| float alpha, |
| uint32_t argb, |
| const CFX_Matrix& matrix, |
| const FXDIB_ResampleOptions& options, |
| std::unique_ptr<CFX_ImageRenderer>* handle, |
| BlendMode blend_type) { |
| if (m_pBitmap->GetBuffer().empty()) |
| return true; |
| |
| *handle = std::make_unique<CFX_ImageRenderer>( |
| m_pBitmap, m_pClipRgn.get(), std::move(bitmap), alpha, argb, matrix, |
| options, m_bRgbByteOrder); |
| return true; |
| } |
| |
| bool CFX_AggDeviceDriver::ContinueDIBits(CFX_ImageRenderer* pHandle, |
| PauseIndicatorIface* pPause) { |
| return m_pBitmap->GetBuffer().empty() || pHandle->Continue(pPause); |
| } |
| |
| } // namespace pdfium |
| |
| bool CFX_DefaultRenderDevice::AttachAggImpl( |
| RetainPtr<CFX_DIBitmap> pBitmap, |
| bool bRgbByteOrder, |
| RetainPtr<CFX_DIBitmap> pBackdropBitmap, |
| bool bGroupKnockout) { |
| // Unlike the Skia version, all callers pass in a non-null `pBitmap`. |
| CHECK(pBitmap); |
| SetBitmap(pBitmap); |
| SetDeviceDriver(std::make_unique<pdfium::CFX_AggDeviceDriver>( |
| std::move(pBitmap), bRgbByteOrder, std::move(pBackdropBitmap), |
| bGroupKnockout)); |
| return true; |
| } |
| |
| bool CFX_DefaultRenderDevice::CreateAgg( |
| int width, |
| int height, |
| FXDIB_Format format, |
| RetainPtr<CFX_DIBitmap> pBackdropBitmap) { |
| auto pBitmap = pdfium::MakeRetain<CFX_DIBitmap>(); |
| if (!pBitmap->Create(width, height, format)) |
| return false; |
| |
| SetBitmap(pBitmap); |
| SetDeviceDriver(std::make_unique<pdfium::CFX_AggDeviceDriver>( |
| std::move(pBitmap), false, std::move(pBackdropBitmap), false)); |
| return true; |
| } |
