| // Copyright 2020 PDFium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
| |
| #include "core/fpdfapi/render/cpdf_rendertiling.h" |
| |
| #include <limits> |
| #include <memory> |
| |
| #include "core/fpdfapi/page/cpdf_form.h" |
| #include "core/fpdfapi/page/cpdf_tilingpattern.h" |
| #include "core/fpdfapi/parser/cpdf_document.h" |
| #include "core/fpdfapi/render/cpdf_pagerendercache.h" |
| #include "core/fpdfapi/render/cpdf_rendercontext.h" |
| #include "core/fpdfapi/render/cpdf_renderoptions.h" |
| #include "core/fpdfapi/render/cpdf_renderstatus.h" |
| #include "core/fxcrt/fx_safe_types.h" |
| #include "core/fxge/cfx_defaultrenderdevice.h" |
| |
| namespace { |
| |
| RetainPtr<CFX_DIBitmap> DrawPatternBitmap( |
| CPDF_Document* pDoc, |
| CPDF_PageRenderCache* pCache, |
| CPDF_TilingPattern* pPattern, |
| CPDF_Form* pPatternForm, |
| const CFX_Matrix& mtObject2Device, |
| int width, |
| int height, |
| const CPDF_RenderOptions::Options& draw_options) { |
| auto pBitmap = pdfium::MakeRetain<CFX_DIBitmap>(); |
| if (!pBitmap->Create(width, height, |
| pPattern->colored() ? FXDIB_Format::kArgb |
| : FXDIB_Format::k8bppMask)) { |
| return nullptr; |
| } |
| CFX_DefaultRenderDevice bitmap_device; |
| bitmap_device.Attach(pBitmap, false, nullptr, false); |
| pBitmap->Clear(0); |
| CFX_FloatRect cell_bbox = |
| pPattern->pattern_to_form().TransformRect(pPattern->bbox()); |
| cell_bbox = mtObject2Device.TransformRect(cell_bbox); |
| CFX_FloatRect bitmap_rect(0.0f, 0.0f, width, height); |
| CFX_Matrix mtAdjust; |
| mtAdjust.MatchRect(bitmap_rect, cell_bbox); |
| |
| CFX_Matrix mtPattern2Bitmap = mtObject2Device * mtAdjust; |
| CPDF_RenderOptions options; |
| if (!pPattern->colored()) |
| options.SetColorMode(CPDF_RenderOptions::kAlpha); |
| |
| options.GetOptions() = draw_options; |
| options.GetOptions().bForceHalftone = true; |
| |
| CPDF_RenderContext context(pDoc, nullptr, pCache); |
| context.AppendLayer(pPatternForm, mtPattern2Bitmap); |
| context.Render(&bitmap_device, nullptr, &options, nullptr); |
| #if defined(_SKIA_SUPPORT_PATHS_) |
| bitmap_device.Flush(true); |
| pBitmap->UnPreMultiply(); |
| #endif |
| return pBitmap; |
| } |
| |
| } // namespace |
| |
| // static |
| RetainPtr<CFX_DIBitmap> CPDF_RenderTiling::Draw( |
| CPDF_RenderStatus* pRenderStatus, |
| CPDF_PageObject* pPageObj, |
| CPDF_TilingPattern* pPattern, |
| CPDF_Form* pPatternForm, |
| const CFX_Matrix& mtObj2Device, |
| const FX_RECT& clip_box, |
| bool bStroke) { |
| const CFX_Matrix mtPattern2Device = |
| pPattern->pattern_to_form() * mtObj2Device; |
| |
| CFX_FloatRect cell_bbox = mtPattern2Device.TransformRect(pPattern->bbox()); |
| |
| float ceil_height = std::ceil(cell_bbox.Height()); |
| float ceil_width = std::ceil(cell_bbox.Width()); |
| |
| // Validate the float will fit into the int when the conversion is done. |
| if (!pdfium::base::IsValueInRangeForNumericType<int>(ceil_height) || |
| !pdfium::base::IsValueInRangeForNumericType<int>(ceil_width)) { |
| return nullptr; |
| } |
| |
| int width = static_cast<int>(ceil_width); |
| int height = static_cast<int>(ceil_height); |
| if (width <= 0) |
| width = 1; |
| if (height <= 0) |
| height = 1; |
| |
| CFX_FloatRect clip_box_p = |
| mtPattern2Device.GetInverse().TransformRect(CFX_FloatRect(clip_box)); |
| int min_col = static_cast<int>( |
| ceil((clip_box_p.left - pPattern->bbox().right) / pPattern->x_step())); |
| int max_col = static_cast<int>( |
| floor((clip_box_p.right - pPattern->bbox().left) / pPattern->x_step())); |
| int min_row = static_cast<int>( |
| ceil((clip_box_p.bottom - pPattern->bbox().top) / pPattern->y_step())); |
| int max_row = static_cast<int>( |
| floor((clip_box_p.top - pPattern->bbox().bottom) / pPattern->y_step())); |
| |
| // Make sure we can fit the needed width * height into an int. |
| if (height > std::numeric_limits<int>::max() / width) |
| return nullptr; |
| |
| CFX_RenderDevice* pDevice = pRenderStatus->GetRenderDevice(); |
| CPDF_RenderContext* pContext = pRenderStatus->GetContext(); |
| const CPDF_RenderOptions& options = pRenderStatus->GetRenderOptions(); |
| if (width > clip_box.Width() || height > clip_box.Height() || |
| width * height > clip_box.Width() * clip_box.Height()) { |
| std::unique_ptr<CPDF_GraphicStates> pStates; |
| if (!pPattern->colored()) |
| pStates = CPDF_RenderStatus::CloneObjStates(pPageObj, bStroke); |
| |
| const CPDF_Dictionary* pFormDict = pPatternForm->GetDict(); |
| const CPDF_Dictionary* pFormResource = pFormDict->GetDictFor("Resources"); |
| for (int col = min_col; col <= max_col; col++) { |
| for (int row = min_row; row <= max_row; row++) { |
| CFX_PointF original = mtPattern2Device.Transform( |
| CFX_PointF(col * pPattern->x_step(), row * pPattern->y_step())); |
| CFX_Matrix matrix = mtObj2Device; |
| matrix.Translate(original.x - mtPattern2Device.e, |
| original.y - mtPattern2Device.f); |
| CFX_RenderDevice::StateRestorer restorer2(pDevice); |
| CPDF_RenderStatus status(pContext, pDevice); |
| status.SetOptions(options); |
| status.SetTransparency(pPatternForm->GetTransparency()); |
| status.SetFormResource(pFormResource); |
| status.SetDropObjects(pRenderStatus->GetDropObjects()); |
| status.Initialize(pRenderStatus, pStates.get()); |
| status.RenderObjectList(pPatternForm, matrix); |
| } |
| } |
| return nullptr; |
| } |
| |
| bool bAligned = |
| pPattern->bbox().left == 0 && pPattern->bbox().bottom == 0 && |
| pPattern->bbox().right == pPattern->x_step() && |
| pPattern->bbox().top == pPattern->y_step() && |
| (mtPattern2Device.IsScaled() || mtPattern2Device.Is90Rotated()); |
| if (bAligned) { |
| int orig_x = FXSYS_roundf(mtPattern2Device.e); |
| int orig_y = FXSYS_roundf(mtPattern2Device.f); |
| min_col = (clip_box.left - orig_x) / width; |
| if (clip_box.left < orig_x) |
| min_col--; |
| |
| max_col = (clip_box.right - orig_x) / width; |
| if (clip_box.right <= orig_x) |
| max_col--; |
| |
| min_row = (clip_box.top - orig_y) / height; |
| if (clip_box.top < orig_y) |
| min_row--; |
| |
| max_row = (clip_box.bottom - orig_y) / height; |
| if (clip_box.bottom <= orig_y) |
| max_row--; |
| } |
| float left_offset = cell_bbox.left - mtPattern2Device.e; |
| float top_offset = cell_bbox.bottom - mtPattern2Device.f; |
| RetainPtr<CFX_DIBitmap> pPatternBitmap; |
| if (width * height < 16) { |
| RetainPtr<CFX_DIBitmap> pEnlargedBitmap = DrawPatternBitmap( |
| pContext->GetDocument(), pContext->GetPageCache(), pPattern, |
| pPatternForm, mtObj2Device, 8, 8, options.GetOptions()); |
| pPatternBitmap = pEnlargedBitmap->StretchTo( |
| width, height, FXDIB_ResampleOptions(), nullptr); |
| } else { |
| pPatternBitmap = DrawPatternBitmap( |
| pContext->GetDocument(), pContext->GetPageCache(), pPattern, |
| pPatternForm, mtObj2Device, width, height, options.GetOptions()); |
| } |
| if (!pPatternBitmap) |
| return nullptr; |
| |
| if (options.ColorModeIs(CPDF_RenderOptions::kGray)) |
| pPatternBitmap->ConvertColorScale(0, 0xffffff); |
| |
| FX_ARGB fill_argb = pRenderStatus->GetFillArgb(pPageObj); |
| int clip_width = clip_box.right - clip_box.left; |
| int clip_height = clip_box.bottom - clip_box.top; |
| auto pScreen = pdfium::MakeRetain<CFX_DIBitmap>(); |
| if (!pScreen->Create(clip_width, clip_height, FXDIB_Format::kArgb)) |
| return nullptr; |
| |
| pScreen->Clear(0); |
| const uint8_t* const src_buf = pPatternBitmap->GetBuffer(); |
| for (int col = min_col; col <= max_col; col++) { |
| for (int row = min_row; row <= max_row; row++) { |
| int start_x; |
| int start_y; |
| if (bAligned) { |
| start_x = |
| FXSYS_roundf(mtPattern2Device.e) + col * width - clip_box.left; |
| start_y = |
| FXSYS_roundf(mtPattern2Device.f) + row * height - clip_box.top; |
| } else { |
| CFX_PointF original = mtPattern2Device.Transform( |
| CFX_PointF(col * pPattern->x_step(), row * pPattern->y_step())); |
| |
| FX_SAFE_INT32 safeStartX = FXSYS_roundf(original.x + left_offset); |
| FX_SAFE_INT32 safeStartY = FXSYS_roundf(original.y + top_offset); |
| |
| safeStartX -= clip_box.left; |
| safeStartY -= clip_box.top; |
| if (!safeStartX.IsValid() || !safeStartY.IsValid()) |
| return nullptr; |
| |
| start_x = safeStartX.ValueOrDie(); |
| start_y = safeStartY.ValueOrDie(); |
| } |
| if (width == 1 && height == 1) { |
| if (start_x < 0 || start_x >= clip_box.Width() || start_y < 0 || |
| start_y >= clip_box.Height()) { |
| continue; |
| } |
| uint32_t* dest_buf = reinterpret_cast<uint32_t*>( |
| pScreen->GetWritableScanline(start_y).subspan(start_x * 4).data()); |
| if (pPattern->colored()) { |
| const auto* src_buf32 = reinterpret_cast<const uint32_t*>(src_buf); |
| *dest_buf = *src_buf32; |
| } else { |
| *dest_buf = (*src_buf << 24) | (fill_argb & 0xffffff); |
| } |
| } else { |
| if (pPattern->colored()) { |
| pScreen->CompositeBitmap(start_x, start_y, width, height, |
| pPatternBitmap, 0, 0, BlendMode::kNormal, |
| nullptr, false); |
| } else { |
| pScreen->CompositeMask(start_x, start_y, width, height, |
| pPatternBitmap, fill_argb, 0, 0, |
| BlendMode::kNormal, nullptr, false); |
| } |
| } |
| } |
| } |
| return pScreen; |
| } |
