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pdfium/pdfium/dba25aa51095304ce1d71f8755fef2dd426d5574/./core/fxge/cfx_renderdevice.cpp
blob: 64aa31b9f68448cd0d90d0d3fd02b65d04dd7254 [file]
// Copyright 2016 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/cfx_renderdevice.h"
#include <math.h>
#include <algorithm>
#include <array>
#include <memory>
#include <utility>
#include "build/build_config.h"
#include "core/fxcrt/check.h"
#include "core/fxcrt/check_op.h"
#include "core/fxcrt/compiler_specific.h"
#include "core/fxcrt/fx_safe_types.h"
#include "core/fxcrt/span.h"
#include "core/fxcrt/zip.h"
#include "core/fxge/cfx_color.h"
#include "core/fxge/cfx_defaultrenderdevice.h"
#include "core/fxge/cfx_fillrenderoptions.h"
#include "core/fxge/cfx_font.h"
#include "core/fxge/cfx_fontmgr.h"
#include "core/fxge/cfx_gemodule.h"
#include "core/fxge/cfx_glyphbitmap.h"
#include "core/fxge/cfx_glyphcache.h"
#include "core/fxge/cfx_graphstatedata.h"
#include "core/fxge/cfx_path.h"
#include "core/fxge/cfx_textrenderoptions.h"
#include "core/fxge/dib/cfx_dibitmap.h"
#include "core/fxge/fx_font.h"
#include "core/fxge/renderdevicedriver_iface.h"
#include "core/fxge/text_char_pos.h"
#include "core/fxge/text_glyph_pos.h"
#if defined(PDF_USE_SKIA)
#include "third_party/skia/include/core/SkTypes.h" // nogncheck
#endif
namespace {
void AdjustGlyphSpace(std::vector<TextGlyphPos>* pGlyphAndPos) {
DCHECK_GT(pGlyphAndPos->size(), 1u);
std::vector<TextGlyphPos>& glyphs = *pGlyphAndPos;
bool bVertical = glyphs.back().origin_.x == glyphs.front().origin_.x;
if (!bVertical && (glyphs.back().origin_.y != glyphs.front().origin_.y)) {
return;
}
for (size_t i = glyphs.size() - 1; i > 1; --i) {
const TextGlyphPos& next = glyphs[i];
int next_origin = bVertical ? next.origin_.y : next.origin_.x;
float next_origin_f =
bVertical ? next.device_origin_.y : next.device_origin_.x;
TextGlyphPos& current = glyphs[i - 1];
int& current_origin = bVertical ? current.origin_.y : current.origin_.x;
float current_origin_f =
bVertical ? current.device_origin_.y : current.device_origin_.x;
FX_SAFE_INT32 safe_space = next_origin;
safe_space -= current_origin;
if (!safe_space.IsValid()) {
continue;
}
int space = safe_space.ValueOrDie();
float space_f = next_origin_f - current_origin_f;
float error = fabs(space_f) - fabs(static_cast<float>(space));
if (error <= 0.5f) {
continue;
}
FX_SAFE_INT32 safe_origin = current_origin;
safe_origin += space > 0 ? -1 : 1;
if (!safe_origin.IsValid()) {
continue;
}
current_origin = safe_origin.ValueOrDie();
}
}
constexpr std::array<const uint8_t, 256> kTextGammaAdjust = {{
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) {
return kTextGammaAdjust[value];
}
int CalcAlpha(int src, int alpha) {
return src * alpha / 255;
}
void MergeGammaAdjust(uint8_t src, int channel, int alpha, uint8_t* dest) {
*dest = AlphaMerge(*dest, channel, CalcAlpha(TextGammaAdjust(src), alpha));
}
void MergeGammaAdjustRgb(const uint8_t* src,
const FX_BGRA_STRUCT<uint8_t>& bgra,
uint8_t* dest) {
UNSAFE_TODO({
MergeGammaAdjust(src[2], bgra.blue, bgra.alpha, &dest[0]);
MergeGammaAdjust(src[1], bgra.green, bgra.alpha, &dest[1]);
MergeGammaAdjust(src[0], bgra.red, bgra.alpha, &dest[2]);
});
}
int AverageRgb(const uint8_t* src) {
return UNSAFE_TODO((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 ApplyAlpha(pdfium::span<uint8_t, 3> dest,
const FX_BGRA_STRUCT<uint8_t>& bgra,
int alpha) {
dest[0] = AlphaMerge(dest[0], bgra.blue, alpha);
dest[1] = AlphaMerge(dest[1], bgra.green, alpha);
dest[2] = AlphaMerge(dest[2], bgra.red, alpha);
}
void ApplyDestAlpha(uint8_t back_alpha,
int src_alpha,
const FX_BGRA_STRUCT<uint8_t>& bgra,
pdfium::span<uint8_t, 4> dest) {
uint8_t dest_alpha = CalculateDestAlpha(back_alpha, src_alpha);
ApplyAlpha(dest.first<3u>(), bgra, src_alpha * 255 / dest_alpha);
dest[3] = dest_alpha;
}
void NormalizeArgb(int src_value,
const FX_BGRA_STRUCT<uint8_t>& bgra,
pdfium::span<uint8_t, 4> dest,
int src_alpha) {
uint8_t back_alpha = dest[3];
if (back_alpha == 0) {
FXARGB_SetDIB(dest, ArgbEncode(src_alpha, bgra.red, bgra.green, bgra.blue));
} else if (src_alpha != 0) {
ApplyDestAlpha(back_alpha, src_alpha, bgra, dest);
}
}
void NormalizeDest(bool has_alpha,
int src_value,
const FX_BGRA_STRUCT<uint8_t>& bgra,
pdfium::span<uint8_t> dest) {
if (has_alpha) {
NormalizeArgb(src_value, bgra, dest.first<4u>(),
CalcAlpha(TextGammaAdjust(src_value), bgra.alpha));
return;
}
int src_alpha = CalcAlpha(TextGammaAdjust(src_value), bgra.alpha);
if (src_alpha == 0) {
return;
}
ApplyAlpha(dest.first<3u>(), bgra, src_alpha);
}
void NormalizeSrc(bool has_alpha,
int src_value,
const FX_BGRA_STRUCT<uint8_t>& bgra,
pdfium::span<uint8_t> dest) {
if (!has_alpha) {
ApplyAlpha(dest.first<3u>(), bgra,
CalcAlpha(TextGammaAdjust(src_value), bgra.alpha));
return;
}
int src_alpha = CalcAlpha(TextGammaAdjust(src_value), bgra.alpha);
if (src_alpha != 0) {
NormalizeArgb(src_value, bgra, dest.first<4u>(), src_alpha);
}
}
void SetAlpha(bool has_alpha, pdfium::span<uint8_t> alpha) {
if (has_alpha) {
alpha[3] = 255;
}
}
void DrawNormalTextHelper(const RetainPtr<CFX_DIBitmap>& bitmap,
const CFX_DIBitmap* pGlyph,
int nrows,
int left,
int top,
int start_col,
int end_col,
bool normalize,
int x_subpixel,
const FX_BGRA_STRUCT<uint8_t>& bgra) {
// TODO(crbug.com/42271020): Add support for `FXDIB_Format::kBgraPremul`.
CHECK(!bitmap->IsPremultiplied());
const bool has_alpha = bitmap->IsAlphaFormat();
const size_t bytes_per_pixel = has_alpha ? 4 : bitmap->GetBPP() / 8;
for (int row = 0; row < nrows; ++row) {
FX_SAFE_INT32 safe_dest_row = row;
safe_dest_row += top;
const int dest_row = safe_dest_row.ValueOrDefault(-1);
if (dest_row < 0 || dest_row >= bitmap->GetHeight()) {
continue;
}
const uint8_t* src_scan =
pGlyph->GetScanline(row)
.subspan(static_cast<size_t>((start_col - left) * 3))
.data();
auto dest_span = bitmap->GetWritableScanline(dest_row).subspan(
static_cast<size_t>(start_col * bytes_per_pixel));
if (x_subpixel == 0) {
for (int col = start_col; col < end_col; ++col) {
if (normalize) {
int src_value = AverageRgb(&src_scan[0]);
NormalizeDest(has_alpha, src_value, bgra, dest_span);
} else {
MergeGammaAdjustRgb(&src_scan[0], bgra, &dest_span[0]);
SetAlpha(has_alpha, dest_span);
}
UNSAFE_TODO(src_scan += 3;);
dest_span = dest_span.subspan(bytes_per_pixel);
}
continue;
}
UNSAFE_TODO({
if (x_subpixel == 1) {
if (normalize) {
int src_value = start_col > left ? AverageRgb(&src_scan[-1])
: (src_scan[0] + src_scan[1]) / 3;
NormalizeSrc(has_alpha, src_value, bgra, dest_span);
} else {
if (start_col > left) {
MergeGammaAdjust(src_scan[-1], bgra.red, bgra.alpha, &dest_span[2]);
}
MergeGammaAdjust(src_scan[0], bgra.green, bgra.alpha, &dest_span[1]);
MergeGammaAdjust(src_scan[1], bgra.blue, bgra.alpha, &dest_span[0]);
SetAlpha(has_alpha, dest_span);
}
src_scan += 3;
dest_span = dest_span.subspan(bytes_per_pixel);
for (int col = start_col + 1; col < end_col; ++col) {
if (normalize) {
int src_value = AverageRgb(&src_scan[-1]);
NormalizeDest(has_alpha, src_value, bgra, dest_span);
} else {
MergeGammaAdjustRgb(&src_scan[-1], bgra, &dest_span[0]);
SetAlpha(has_alpha, dest_span);
}
src_scan += 3;
dest_span = dest_span.subspan(bytes_per_pixel);
}
continue;
}
if (normalize) {
int src_value =
start_col > left ? AverageRgb(&src_scan[-2]) : src_scan[0] / 3;
NormalizeSrc(has_alpha, src_value, bgra, dest_span);
} else {
if (start_col > left) {
MergeGammaAdjust(src_scan[-2], bgra.red, bgra.alpha, &dest_span[2]);
MergeGammaAdjust(src_scan[-1], bgra.green, bgra.alpha, &dest_span[1]);
}
MergeGammaAdjust(src_scan[0], bgra.blue, bgra.alpha, &dest_span[0]);
SetAlpha(has_alpha, dest_span);
}
src_scan += 3;
dest_span = dest_span.subspan(bytes_per_pixel);
for (int col = start_col + 1; col < end_col; ++col) {
if (normalize) {
int src_value = AverageRgb(&src_scan[-2]);
NormalizeDest(has_alpha, src_value, bgra, dest_span);
} else {
MergeGammaAdjustRgb(&src_scan[-2], bgra, &dest_span[0]);
SetAlpha(has_alpha, dest_span);
}
src_scan += 3;
dest_span = dest_span.subspan(bytes_per_pixel);
}
});
}
}
bool ShouldDrawDeviceText(const CFX_Font* font,
const CFX_TextRenderOptions& options) {
#if BUILDFLAG(IS_APPLE)
if (options.font_is_cid) {
return false;
}
const ByteString bsPsName = font->GetPsName();
if (bsPsName.Contains("+ZJHL")) {
return false;
}
if (bsPsName == "CNAAJI+cmex10") {
return false;
}
#endif
return true;
}
// Returns true if the path is a 3-point path that draws A->B->A and forms a
// zero area, or a 2-point path which draws A->B.
bool CheckSimpleLinePath(pdfium::span<const CFX_Path::Point> points,
const CFX_Matrix* matrix,
bool adjust,
CFX_Path* new_path,
bool* thin,
bool* set_identity) {
if (points.size() != 2 && points.size() != 3) {
return false;
}
if (points[0].type_ != CFX_Path::Point::Type::kMove ||
points[1].type_ != CFX_Path::Point::Type::kLine ||
(points.size() == 3 && (points[2].type_ != CFX_Path::Point::Type::kLine ||
points[0].point_ != points[2].point_))) {
return false;
}
// A special case that all points are identical, zero area is formed and no
// thin line needs to be drawn.
if (points[0].point_ == points[1].point_) {
return true;
}
for (size_t i = 0; i < 2; i++) {
CFX_PointF point = points[i].point_;
if (adjust) {
if (matrix) {
point = matrix->Transform(point);
}
point = CFX_PointF(static_cast<int>(point.x) + 0.5f,
static_cast<int>(point.y) + 0.5f);
}
new_path->AppendPoint(point, points[i].type_);
}
if (adjust && matrix) {
*set_identity = true;
}
*thin = true;
return true;
}
// Returns true if `points` is palindromic and forms zero area. Otherwise,
// returns false.
bool CheckPalindromicPath(pdfium::span<const CFX_Path::Point> points,
CFX_Path* new_path,
bool* thin) {
if (points.size() <= 3 || !(points.size() % 2)) {
return false;
}
const size_t mid = points.size() / 2;
CFX_Path temp_path;
for (size_t i = 0; i < mid; i++) {
const CFX_Path::Point& left = points[mid - i - 1];
const CFX_Path::Point& right = points[mid + i + 1];
bool zero_area = left.point_ == right.point_ &&
left.type_ != CFX_Path::Point::Type::kBezier &&
right.type_ != CFX_Path::Point::Type::kBezier;
if (!zero_area) {
return false;
}
temp_path.AppendPoint(points[mid - i].point_, CFX_Path::Point::Type::kMove);
temp_path.AppendPoint(left.point_, CFX_Path::Point::Type::kLine);
}
new_path->Append(temp_path, nullptr);
*thin = true;
return true;
}
bool IsFoldingVerticalLine(const CFX_PointF& a,
const CFX_PointF& b,
const CFX_PointF& c) {
return a.x == b.x && b.x == c.x && (b.y - a.y) * (b.y - c.y) > 0;
}
bool IsFoldingHorizontalLine(const CFX_PointF& a,
const CFX_PointF& b,
const CFX_PointF& c) {
return a.y == b.y && b.y == c.y && (b.x - a.x) * (b.x - c.x) > 0;
}
bool IsFoldingDiagonalLine(const CFX_PointF& a,
const CFX_PointF& b,
const CFX_PointF& c) {
return a.x != b.x && c.x != b.x && a.y != b.y && c.y != b.y &&
(a.y - b.y) * (c.x - b.x) == (c.y - b.y) * (a.x - b.x);
}
bool GetZeroAreaPath(pdfium::span<const CFX_Path::Point> points,
const CFX_Matrix* matrix,
bool adjust,
CFX_Path* new_path,
bool* thin,
bool* set_identity) {
*set_identity = false;
if (points.size() < 2) {
return false;
}
if (CheckSimpleLinePath(points, matrix, adjust, new_path, thin,
set_identity)) {
return true;
}
if (CheckPalindromicPath(points, new_path, thin)) {
return true;
}
for (size_t i = 0; i < points.size(); i++) {
CFX_Path::Point::Type point_type = points[i].type_;
if (point_type == CFX_Path::Point::Type::kMove) {
DCHECK_EQ(0u, i);
continue;
}
if (point_type == CFX_Path::Point::Type::kBezier) {
i += 2;
DCHECK_LT(i, points.size());
continue;
}
DCHECK_EQ(point_type, CFX_Path::Point::Type::kLine);
size_t next_index = (i + 1) % (points.size());
const CFX_Path::Point& next = points[next_index];
if (next.type_ != CFX_Path::Point::Type::kLine) {
continue;
}
const CFX_Path::Point& prev = points[i - 1];
const CFX_Path::Point& cur = points[i];
if (IsFoldingVerticalLine(prev.point_, cur.point_, next.point_)) {
bool use_prev = fabs(cur.point_.y - prev.point_.y) <
fabs(cur.point_.y - next.point_.y);
const CFX_Path::Point& start = use_prev ? prev : cur;
const CFX_Path::Point& end = use_prev ? cur : next;
new_path->AppendPoint(start.point_, CFX_Path::Point::Type::kMove);
new_path->AppendPoint(end.point_, CFX_Path::Point::Type::kLine);
continue;
}
if (IsFoldingHorizontalLine(prev.point_, cur.point_, next.point_) ||
IsFoldingDiagonalLine(prev.point_, cur.point_, next.point_)) {
bool use_prev = fabs(cur.point_.x - prev.point_.x) <
fabs(cur.point_.x - next.point_.x);
const CFX_Path::Point& start = use_prev ? prev : cur;
const CFX_Path::Point& end = use_prev ? cur : next;
new_path->AppendPoint(start.point_, CFX_Path::Point::Type::kMove);
new_path->AppendPoint(end.point_, CFX_Path::Point::Type::kLine);
continue;
}
}
size_t new_path_size = new_path->GetPoints().size();
if (points.size() > 3 && new_path_size > 0) {
*thin = true;
}
return new_path_size != 0;
}
FXDIB_Format GetCreateCompatibleBitmapFormat(bool bytemask_output,
bool alpha_output,
bool use_argb_premul) {
if (bytemask_output) {
return FXDIB_Format::k8bppMask;
}
#if defined(PDF_USE_SKIA)
if (use_argb_premul) {
return FXDIB_Format::kBgraPremul;
}
#endif
if (alpha_output) {
return FXDIB_Format::kBgra;
}
return CFX_DIBBase::kPlatformRGBFormat;
}
} // namespace
CFX_RenderDevice::CFX_RenderDevice() = default;
CFX_RenderDevice::~CFX_RenderDevice() {
RestoreState(false);
}
bool CFX_RenderDevice::CanUseARGBPremul() const {
#if defined(PDF_USE_SKIA)
return render_cap_premultiplied_alpha_;
#else
return false;
#endif
}
// static
CFX_Matrix CFX_RenderDevice::GetFlipMatrix(float width,
float height,
float left,
float top) {
return CFX_Matrix(width, 0, 0, -height, left, top + height);
}
void CFX_RenderDevice::SetDeviceDriver(
std::unique_ptr<RenderDeviceDriverIface> pDriver) {
DCHECK(pDriver);
DCHECK(!device_driver_);
device_driver_ = std::move(pDriver);
InitDeviceInfo();
}
void CFX_RenderDevice::InitDeviceInfo() {
width_ = device_driver_->GetPixelWidth();
height_ = device_driver_->GetPixelHeight();
bpp_ = device_driver_->GetBitsPerPixel();
render_cap_get_bits_ = device_driver_->RenderCapGetBits();
render_cap_alpha_image_ = device_driver_->RenderCapAlphaImage();
render_cap_blend_mode_ = device_driver_->RenderCapBlendMode();
render_cap_soft_clip_ = device_driver_->RenderCapSoftClip();
render_cap_alpha_output_ = device_driver_->RenderCapAlphaOutput();
render_cap_bytemask_output_ = device_driver_->RenderCapByteMaskOutput();
#if defined(PDF_USE_SKIA)
render_cap_fillstroke_path_ = device_driver_->RenderCapFillStrokePath();
render_cap_shading_ = device_driver_->RenderCapShading();
render_cap_premultiplied_alpha_ =
device_driver_->RenderCapPremultipliedAlpha();
#endif
device_type_ = device_driver_->GetDeviceType();
clip_box_ = device_driver_->GetClipBox();
}
void CFX_RenderDevice::SaveState() {
device_driver_->SaveState();
}
void CFX_RenderDevice::RestoreState(bool bKeepSaved) {
if (device_driver_) {
device_driver_->RestoreState(bKeepSaved);
UpdateClipBox();
}
}
#if BUILDFLAG(IS_WIN)
int CFX_RenderDevice::GetHorzSize() const {
return device_driver_->GetHorzSize();
}
int CFX_RenderDevice::GetVertSize() const {
return device_driver_->GetVertSize();
}
#endif
RetainPtr<CFX_DIBitmap> CFX_RenderDevice::GetBitmap() {
return bitmap_;
}
RetainPtr<const CFX_DIBitmap> CFX_RenderDevice::GetBitmap() const {
return bitmap_;
}
void CFX_RenderDevice::SetBitmap(RetainPtr<CFX_DIBitmap> bitmap) {
bitmap_ = std::move(bitmap);
}
bool CFX_RenderDevice::CreateCompatibleBitmap(
const RetainPtr<CFX_DIBitmap>& pDIB,
int width,
int height) const {
return pDIB->Create(width, height,
GetCreateCompatibleBitmapFormat(
render_cap_bytemask_output_, render_cap_alpha_output_,
CanUseARGBPremul()));
}
void CFX_RenderDevice::SetBaseClip(const FX_RECT& rect) {
device_driver_->SetBaseClip(rect);
}
bool CFX_RenderDevice::SetClip_PathFill(
const CFX_Path& path,
const CFX_Matrix* pObject2Device,
const CFX_FillRenderOptions& fill_options) {
if (!device_driver_->SetClip_PathFill(path, pObject2Device, fill_options)) {
return false;
}
UpdateClipBox();
return true;
}
bool CFX_RenderDevice::SetClip_PathStroke(
const CFX_Path& path,
const CFX_Matrix* pObject2Device,
const CFX_GraphStateData* pGraphState) {
if (!device_driver_->SetClip_PathStroke(path, pObject2Device, pGraphState)) {
return false;
}
UpdateClipBox();
return true;
}
bool CFX_RenderDevice::SetClip_Rect(const FX_RECT& rect) {
CFX_Path path;
path.AppendRect(rect.left, rect.bottom, rect.right, rect.top);
if (!SetClip_PathFill(path, nullptr,
CFX_FillRenderOptions::WindingOptions())) {
return false;
}
UpdateClipBox();
return true;
}
void CFX_RenderDevice::UpdateClipBox() {
clip_box_ = device_driver_->GetClipBox();
}
bool CFX_RenderDevice::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) {
const bool fill =
fill_options.fill_type != CFX_FillRenderOptions::FillType::kNoFill;
uint8_t fill_alpha = fill ? FXARGB_A(fill_color) : 0;
uint8_t stroke_alpha = pGraphState ? FXARGB_A(stroke_color) : 0;
pdfium::span<const CFX_Path::Point> points = path.GetPoints();
if (stroke_alpha == 0 && points.size() == 2) {
CFX_PointF pos1 = points[0].point_;
CFX_PointF pos2 = points[1].point_;
if (pObject2Device) {
pos1 = pObject2Device->Transform(pos1);
pos2 = pObject2Device->Transform(pos2);
}
DrawCosmeticLine(pos1, pos2, fill_color, fill_options);
return true;
}
if (stroke_alpha == 0 && !fill_options.rect_aa) {
std::optional<CFX_FloatRect> maybe_rect_f = path.GetRect(pObject2Device);
if (maybe_rect_f.has_value()) {
const CFX_FloatRect& rect_f = maybe_rect_f.value();
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 = static_cast<int>(ceil(rect_f.right - rect_f.left));
if (width < 1) {
width = 1;
if (rect_i.left == rect_i.right) {
if (!pdfium::CheckAdd(rect_i.right, 1).AssignIfValid(&rect_i.right)) {
return false;
}
}
}
int height = static_cast<int>(ceil(rect_f.top - rect_f.bottom));
if (height < 1) {
height = 1;
if (rect_i.bottom == rect_i.top) {
if (!pdfium::CheckAdd(rect_i.bottom, 1)
.AssignIfValid(&rect_i.bottom)) {
return false;
}
}
}
if (rect_i.Width() >= width + 1) {
if (rect_f.left - static_cast<float>(rect_i.left) >
static_cast<float>(rect_i.right) - rect_f.right) {
if (!pdfium::CheckAdd(rect_i.left, 1).AssignIfValid(&rect_i.left)) {
return false;
}
} else {
if (!pdfium::CheckSub(rect_i.right, 1).AssignIfValid(&rect_i.right)) {
return false;
}
}
}
if (rect_i.Height() >= height + 1) {
if (rect_f.top - static_cast<float>(rect_i.top) >
static_cast<float>(rect_i.bottom) - rect_f.bottom) {
if (!pdfium::CheckAdd(rect_i.top, 1).AssignIfValid(&rect_i.top)) {
return false;
}
} else {
if (!pdfium::CheckSub(rect_i.bottom, 1)
.AssignIfValid(&rect_i.bottom)) {
return false;
}
}
}
if (FillRect(rect_i, fill_color)) {
return true;
}
}
}
if (fill && stroke_alpha == 0 && !fill_options.stroke &&
!fill_options.text_mode) {
bool adjust = !!device_driver_->GetDriverType();
std::vector<CFX_Path::Point> sub_path;
for (size_t i = 0; i < points.size(); i++) {
CFX_Path::Point::Type point_type = points[i].type_;
if (point_type == CFX_Path::Point::Type::kMove) {
// Process the existing sub path.
DrawZeroAreaPath(sub_path, pObject2Device, adjust,
fill_options.aliased_path, fill_color, fill_alpha);
sub_path.clear();
// Start forming the next sub path.
sub_path.push_back(points[i]);
continue;
}
if (point_type == CFX_Path::Point::Type::kBezier) {
sub_path.push_back(points[i]);
sub_path.push_back(points[i + 1]);
sub_path.push_back(points[i + 2]);
i += 2;
continue;
}
DCHECK_EQ(point_type, CFX_Path::Point::Type::kLine);
sub_path.push_back(points[i]);
}
// Process the last sub paths.
DrawZeroAreaPath(sub_path, pObject2Device, adjust,
fill_options.aliased_path, fill_color, fill_alpha);
}
if (fill && fill_alpha && stroke_alpha < 0xff && fill_options.stroke) {
#if defined(PDF_USE_SKIA)
if (render_cap_fillstroke_path_) {
const bool using_skia = CFX_GEModule::Get()->UseSkiaRenderer();
if (using_skia) {
device_driver_->SetGroupKnockout(true);
}
bool draw_fillstroke_path_result =
device_driver_->DrawPath(path, pObject2Device, pGraphState,
fill_color, stroke_color, fill_options);
if (using_skia) {
// Restore the group knockout status for `device_driver_` after
// finishing painting a fill-and-stroke path.
device_driver_->SetGroupKnockout(false);
}
return draw_fillstroke_path_result;
}
#endif // defined(PDF_USE_SKIA)
return DrawFillStrokePath(path, pObject2Device, pGraphState, fill_color,
stroke_color, fill_options);
}
return device_driver_->DrawPath(path, pObject2Device, pGraphState, fill_color,
stroke_color, fill_options);
}
// This can be removed once PDFium entirely relies on Skia
bool CFX_RenderDevice::DrawFillStrokePath(
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) {
if (!render_cap_get_bits_) {
return false;
}
CFX_FloatRect bbox;
if (pGraphState) {
bbox = path.GetBoundingBoxForStrokePath(pGraphState->line_width(),
pGraphState->miter_limit());
} else {
bbox = path.GetBoundingBox();
}
if (pObject2Device) {
bbox = pObject2Device->TransformRect(bbox);
}
FX_RECT rect = bbox.GetOuterRect();
if (!rect.Valid()) {
return false;
}
auto bitmap = pdfium::MakeRetain<CFX_DIBitmap>();
auto backdrop = pdfium::MakeRetain<CFX_DIBitmap>();
if (!CreateCompatibleBitmap(bitmap, rect.Width(), rect.Height())) {
return false;
}
if (bitmap->IsAlphaFormat()) {
backdrop->Copy(bitmap);
} else {
if (!device_driver_->GetDIBits(bitmap, rect.left, rect.top)) {
return false;
}
backdrop->Copy(bitmap);
}
CFX_DefaultRenderDevice bitmap_device;
bitmap_device.AttachWithBackdropAndGroupKnockout(bitmap, std::move(backdrop),
/*bGroupKnockout=*/true);
CFX_Matrix matrix;
if (pObject2Device) {
matrix = *pObject2Device;
}
matrix.Translate(-rect.left, -rect.top);
if (!bitmap_device.GetDeviceDriver()->DrawPath(
path, &matrix, pGraphState, fill_color, stroke_color, fill_options)) {
return false;
}
FX_RECT src_rect(0, 0, rect.Width(), rect.Height());
return device_driver_->SetDIBits(std::move(bitmap), /*color=*/0, src_rect,
rect.left, rect.top, BlendMode::kNormal);
}
bool CFX_RenderDevice::FillRect(const FX_RECT& rect, uint32_t fill_color) {
if (device_driver_->FillRect(rect, fill_color)) {
return true;
}
#if BUILDFLAG(IS_WIN)
if (!render_cap_get_bits_) {
return false;
}
auto bitmap = pdfium::MakeRetain<CFX_DIBitmap>();
if (!CreateCompatibleBitmap(bitmap, rect.Width(), rect.Height())) {
return false;
}
if (!device_driver_->GetDIBits(bitmap, rect.left, rect.top)) {
return false;
}
if (!bitmap->CompositeRect(0, 0, rect.Width(), rect.Height(), fill_color)) {
return false;
}
FX_RECT src_rect(0, 0, rect.Width(), rect.Height());
device_driver_->SetDIBits(std::move(bitmap), /*color=*/0, src_rect, rect.left,
rect.top, BlendMode::kNormal);
return true;
#else
CHECK(!render_cap_get_bits_);
return false;
#endif
}
bool CFX_RenderDevice::DrawCosmeticLine(
const CFX_PointF& ptMoveTo,
const CFX_PointF& ptLineTo,
uint32_t color,
const CFX_FillRenderOptions& fill_options) {
if ((color >= 0xff000000) &&
device_driver_->DrawCosmeticLine(ptMoveTo, ptLineTo, color)) {
return true;
}
CFX_GraphStateData graph_state;
CFX_Path path;
path.AppendPoint(ptMoveTo, CFX_Path::Point::Type::kMove);
path.AppendPoint(ptLineTo, CFX_Path::Point::Type::kLine);
return device_driver_->DrawPath(path, nullptr, &graph_state, 0, color,
fill_options);
}
void CFX_RenderDevice::DrawZeroAreaPath(
const std::vector<CFX_Path::Point>& path,
const CFX_Matrix* matrix,
bool adjust,
bool aliased_path,
uint32_t fill_color,
uint8_t fill_alpha) {
if (path.empty()) {
return;
}
CFX_Path new_path;
bool thin = false;
bool set_identity = false;
if (!GetZeroAreaPath(path, matrix, adjust, &new_path, &thin, &set_identity)) {
return;
}
CFX_GraphStateData graph_state;
graph_state.set_line_width(0.0f);
uint32_t stroke_color = fill_color;
if (thin) {
stroke_color = (((fill_alpha >> 2) << 24) | (stroke_color & 0x00ffffff));
}
const CFX_Matrix* new_matrix = nullptr;
if (matrix && !matrix->IsIdentity() && !set_identity) {
new_matrix = matrix;
}
CFX_FillRenderOptions path_options;
path_options.zero_area = true;
path_options.aliased_path = aliased_path;
device_driver_->DrawPath(new_path, new_matrix, &graph_state, 0, stroke_color,
path_options);
}
bool CFX_RenderDevice::GetDIBits(RetainPtr<CFX_DIBitmap> bitmap,
int left,
int top) const {
return render_cap_get_bits_ &&
device_driver_->GetDIBits(std::move(bitmap), left, top);
}
bool CFX_RenderDevice::SetDIBits(RetainPtr<const CFX_DIBBase> bitmap,
int left,
int top) {
return SetDIBitsWithBlend(std::move(bitmap), left, top, BlendMode::kNormal);
}
RetainPtr<const CFX_DIBitmap> CFX_RenderDevice::GetBackDrop() const {
return device_driver_->GetBackDrop();
}
bool CFX_RenderDevice::SetDIBitsWithBlend(RetainPtr<const CFX_DIBBase> bitmap,
int left,
int top,
BlendMode blend_mode) {
DCHECK(!bitmap->IsMaskFormat());
FX_RECT dest_rect(left, top, left + bitmap->GetWidth(),
top + bitmap->GetHeight());
dest_rect.Intersect(clip_box_);
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());
if ((blend_mode == BlendMode::kNormal || render_cap_blend_mode_) &&
(!bitmap->IsAlphaFormat() || render_cap_alpha_image_)) {
return device_driver_->SetDIBits(std::move(bitmap), /*color=*/0, src_rect,
dest_rect.left, dest_rect.top, blend_mode);
}
if (!render_cap_get_bits_) {
return false;
}
int bg_pixel_width = dest_rect.Width();
int bg_pixel_height = dest_rect.Height();
auto background = pdfium::MakeRetain<CFX_DIBitmap>();
if (!background->Create(bg_pixel_width, bg_pixel_height,
FXDIB_Format::kBgrx)) {
return false;
}
if (!device_driver_->GetDIBits(background, dest_rect.left, dest_rect.top)) {
return false;
}
if (!background->CompositeBitmap(0, 0, bg_pixel_width, bg_pixel_height,
std::move(bitmap), src_rect.left,
src_rect.top, blend_mode)) {
return false;
}
FX_RECT rect(0, 0, bg_pixel_width, bg_pixel_height);
return device_driver_->SetDIBits(std::move(background), /*color=*/0, rect,
dest_rect.left, dest_rect.top,
BlendMode::kNormal);
}
bool CFX_RenderDevice::StretchDIBits(RetainPtr<const CFX_DIBBase> bitmap,
int left,
int top,
int dest_width,
int dest_height) {
return StretchDIBitsWithFlagsAndBlend(
std::move(bitmap), left, top, dest_width, dest_height,
FXDIB_ResampleOptions(), BlendMode::kNormal);
}
bool CFX_RenderDevice::StretchDIBitsWithFlagsAndBlend(
RetainPtr<const CFX_DIBBase> bitmap,
int left,
int top,
int dest_width,
int dest_height,
const FXDIB_ResampleOptions& options,
BlendMode blend_mode) {
FX_RECT dest_rect(left, top, left + dest_width, top + dest_height);
FX_RECT clip_box = clip_box_;
clip_box.Intersect(dest_rect);
return clip_box.IsEmpty() || device_driver_->StretchDIBits(
std::move(bitmap), 0, left, top, dest_width,
dest_height, &clip_box, options, blend_mode);
}
bool CFX_RenderDevice::SetBitMask(RetainPtr<const CFX_DIBBase> bitmap,
int left,
int top,
uint32_t argb) {
FX_RECT src_rect(0, 0, bitmap->GetWidth(), bitmap->GetHeight());
return device_driver_->SetDIBits(std::move(bitmap), argb, src_rect, left, top,
BlendMode::kNormal);
}
bool CFX_RenderDevice::StretchBitMask(RetainPtr<CFX_DIBBase> bitmap,
int left,
int top,
int dest_width,
int dest_height,
uint32_t color) {
return StretchBitMaskWithFlags(std::move(bitmap), left, top, dest_width,
dest_height, color, FXDIB_ResampleOptions());
}
bool CFX_RenderDevice::StretchBitMaskWithFlags(
RetainPtr<CFX_DIBBase> bitmap,
int left,
int top,
int dest_width,
int dest_height,
uint32_t argb,
const FXDIB_ResampleOptions& options) {
FX_RECT dest_rect(left, top, left + dest_width, top + dest_height);
FX_RECT clip_box = clip_box_;
clip_box.Intersect(dest_rect);
return device_driver_->StretchDIBits(std::move(bitmap), argb, left, top,
dest_width, dest_height, &clip_box,
options, BlendMode::kNormal);
}
RenderDeviceDriverIface::StartResult CFX_RenderDevice::StartDIBits(
RetainPtr<const CFX_DIBBase> bitmap,
float alpha,
uint32_t argb,
const CFX_Matrix& matrix,
const FXDIB_ResampleOptions& options) {
return StartDIBitsWithBlend(std::move(bitmap), alpha, argb, matrix, options,
BlendMode::kNormal);
}
RenderDeviceDriverIface::StartResult CFX_RenderDevice::StartDIBitsWithBlend(
RetainPtr<const CFX_DIBBase> bitmap,
float alpha,
uint32_t argb,
const CFX_Matrix& matrix,
const FXDIB_ResampleOptions& options,
BlendMode blend_mode) {
return device_driver_->StartDIBits(std::move(bitmap), alpha, argb, matrix,
options, blend_mode);
}
bool CFX_RenderDevice::ContinueDIBits(
RenderDeviceDriverIface::Continuation* continuation,
PauseIndicatorIface* pPause) {
return device_driver_->ContinueDIBits(continuation, pPause);
}
#if defined(PDF_USE_SKIA)
bool CFX_RenderDevice::DrawShading(const CPDF_ShadingPattern& pattern,
const CFX_Matrix& matrix,
const FX_RECT& clip_rect,
int alpha) {
return device_driver_->DrawShading(pattern, matrix, clip_rect, alpha);
}
bool CFX_RenderDevice::SetBitsWithMask(RetainPtr<const CFX_DIBBase> bitmap,
RetainPtr<const CFX_DIBBase> mask,
int left,
int top,
float alpha,
BlendMode blend_type) {
return device_driver_->SetBitsWithMask(std::move(bitmap), std::move(mask),
left, top, alpha, blend_type);
}
void CFX_RenderDevice::SyncInternalBitmaps() {
device_driver_->SyncInternalBitmaps();
}
#endif // defined(PDF_USE_SKIA)
bool CFX_RenderDevice::DrawNormalText(pdfium::span<const TextCharPos> pCharPos,
CFX_Font* font,
float font_size,
const CFX_Matrix& mtText2Device,
uint32_t fill_color,
const CFX_TextRenderOptions& options) {
// `anti_alias` and `normalize` don't affect Skia rendering.
FontAntiAliasingMode anti_alias = FontAntiAliasingMode::kMono;
bool normalize = false;
const bool is_text_smooth = options.IsSmooth();
// |text_options| has the potential to affect all derived classes of
// RenderDeviceDriverIface. But now it only affects Skia rendering.
CFX_TextRenderOptions text_options(options);
if (is_text_smooth) {
if (GetDeviceType() == DeviceType::kDisplay && 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 anti-aliasing very ugly, so we
// instead fall back on NORMAL anti-aliasing.
anti_alias = FontAntiAliasingMode::kNormal;
#if defined(PDF_USE_SKIA)
if (CFX_GEModule::Get()->UseSkiaRenderer()) {
// Since |anti_alias| doesn't affect Skia rendering, and Skia only
// follows strictly to the options provided by |text_options|, we need
// to update |text_options| so that Skia falls back on normal
// anti-aliasing as well.
text_options.aliasing_type = CFX_TextRenderOptions::kAntiAliasing;
}
#endif
} else if (render_cap_alpha_output_) {
// Whether Skia uses LCD optimization should strictly follow the
// rendering options provided by |text_options|. No change needs to be
// done for |text_options| here.
anti_alias = FontAntiAliasingMode::kLcd;
normalize = true;
} else if (bpp_ < 16) {
// This case doesn't apply to Skia since Skia always have |bpp_| = 32.
anti_alias = FontAntiAliasingMode::kNormal;
} else {
// Whether Skia uses LCD optimization should strictly follow the
// rendering options provided by |text_options|. No change needs to be
// done for |text_options| here.
anti_alias = FontAntiAliasingMode::kLcd;
normalize = !font->HasFace() ||
options.aliasing_type != CFX_TextRenderOptions::kLcd;
}
}
}
#if BUILDFLAG(IS_WIN)
const bool is_printer = GetDeviceType() == DeviceType::kPrinter;
bool try_native_text = true;
#else
static constexpr bool is_printer = false;
static constexpr bool try_native_text = true;
#endif
#if BUILDFLAG(IS_WIN)
if (GetDeviceType() == DeviceType::kPrinter) {
if (ShouldDrawDeviceText(font, options) &&
device_driver_->DrawDeviceText(pCharPos, font, mtText2Device, font_size,
fill_color, text_options)) {
return true;
}
if (FXARGB_A(fill_color) < 255) {
return false;
}
try_native_text = false;
}
#endif
if (try_native_text && options.native_text) {
if (ShouldDrawDeviceText(font, options) &&
device_driver_->DrawDeviceText(pCharPos, font, mtText2Device, font_size,
fill_color, text_options)) {
return true;
}
}
CFX_Matrix char2device = mtText2Device;
CFX_Matrix text2Device = mtText2Device;
char2device.Scale(font_size, -font_size);
if (fabs(char2device.a) + fabs(char2device.b) > 50 * 1.0f || is_printer) {
if (font->HasFace()) {
CFX_FillRenderOptions path_options;
path_options.aliased_path = !is_text_smooth;
return DrawTextPath(pCharPos, font, font_size, mtText2Device, nullptr,
nullptr, fill_color, 0, nullptr, path_options);
}
}
std::vector<TextGlyphPos> glyphs(pCharPos.size());
const bool anti_alias_is_lcd = anti_alias == FontAntiAliasingMode::kLcd;
for (auto [charpos, glyph] : fxcrt::Zip(pCharPos, pdfium::span(glyphs))) {
glyph.device_origin_ = text2Device.Transform(charpos.origin_);
glyph.origin_.x = anti_alias_is_lcd
? static_cast<int>(floor(glyph.device_origin_.x))
: FXSYS_roundf(glyph.device_origin_.x);
glyph.origin_.y = FXSYS_roundf(glyph.device_origin_.y);
CFX_Matrix matrix = charpos.GetEffectiveMatrix(char2device);
glyph.glyph_ = font->LoadGlyphBitmap(
charpos.glyph_index_, charpos.font_style_, matrix,
charpos.font_char_width_, anti_alias, &text_options);
}
if (!anti_alias_is_lcd && glyphs.size() > 1) {
AdjustGlyphSpace(&glyphs);
}
FX_RECT bmp_rect = GetGlyphsBBox(glyphs, anti_alias_is_lcd);
bmp_rect.Intersect(clip_box_);
if (bmp_rect.IsEmpty()) {
return true;
}
int pixel_width = bmp_rect.Width();
int pixel_height = bmp_rect.Height();
int pixel_left = bmp_rect.left;
int pixel_top = bmp_rect.top;
if (anti_alias == FontAntiAliasingMode::kMono) {
auto bitmap = pdfium::MakeRetain<CFX_DIBitmap>();
if (!bitmap->Create(pixel_width, pixel_height, FXDIB_Format::k1bppMask)) {
return false;
}
for (const TextGlyphPos& glyph : glyphs) {
if (!glyph.glyph_) {
continue;
}
std::optional<CFX_Point> point = glyph.GetOrigin({pixel_left, pixel_top});
if (!point.has_value()) {
continue;
}
RetainPtr<const CFX_DIBitmap> glyph_bitmap = glyph.glyph_->GetBitmap();
bitmap->CompositeOneBPPMask(point.value().x, point.value().y,
glyph_bitmap->GetWidth(),
glyph_bitmap->GetHeight(), glyph_bitmap,
/*src_left=*/0, /*src_top=*/0);
}
return SetBitMask(std::move(bitmap), bmp_rect.left, bmp_rect.top,
fill_color);
}
auto bitmap = pdfium::MakeRetain<CFX_DIBitmap>();
if (bpp_ == 8) {
if (!bitmap->Create(pixel_width, pixel_height, FXDIB_Format::k8bppMask)) {
return false;
}
} else {
// TODO(crbug.com/42271020): Switch to CreateCompatibleBitmap() once
// DrawNormalTextHelper() supports `FXDIB_Format::kBgraPremul`.
if (!bitmap->Create(
pixel_width, pixel_height,
GetCreateCompatibleBitmapFormat(render_cap_bytemask_output_,
render_cap_alpha_output_,
/*use_argb_premul=*/false))) {
return false;
}
}
if (!bitmap->IsAlphaFormat() && !bitmap->IsMaskFormat()) {
bitmap->Clear(0xFFFFFFFF);
if (!GetDIBits(bitmap, bmp_rect.left, bmp_rect.top)) {
return false;
}
}
int dest_width = pixel_width;
FX_BGRA_STRUCT<uint8_t> bgra;
if (anti_alias == FontAntiAliasingMode::kLcd) {
bgra = ArgbToBGRAStruct(fill_color);
}
for (const TextGlyphPos& glyph : glyphs) {
if (!glyph.glyph_) {
continue;
}
std::optional<CFX_Point> point = glyph.GetOrigin({pixel_left, pixel_top});
if (!point.has_value()) {
continue;
}
RetainPtr<const CFX_DIBitmap> glyph_bitmap = glyph.glyph_->GetBitmap();
int ncols = glyph_bitmap->GetWidth();
int nrows = glyph_bitmap->GetHeight();
if (anti_alias == FontAntiAliasingMode::kNormal) {
if (!bitmap->CompositeMask(point.value().x, point.value().y, ncols, nrows,
glyph_bitmap, fill_color, /*src_left=*/0,
/*src_top=*/0, BlendMode::kNormal)) {
return false;
}
continue;
}
ncols /= 3;
int x_subpixel = static_cast<int>(glyph.device_origin_.x * 3) % 3;
int start_col = std::max(point->x, 0);
FX_SAFE_INT32 end_col_safe = point->x;
end_col_safe += ncols;
if (!end_col_safe.IsValid()) {
continue;
}
int end_col = std::min<int>(end_col_safe.ValueOrDie(), dest_width);
if (start_col >= end_col) {
continue;
}
DrawNormalTextHelper(bitmap, glyph_bitmap, nrows, point->x, point->y,
start_col, end_col, normalize, x_subpixel, bgra);
}
if (bitmap->IsMaskFormat()) {
SetBitMask(std::move(bitmap), bmp_rect.left, bmp_rect.top, fill_color);
} else {
SetDIBits(std::move(bitmap), bmp_rect.left, bmp_rect.top);
}
return true;
}
bool CFX_RenderDevice::DrawTextPath(pdfium::span<const TextCharPos> pCharPos,
CFX_Font* font,
float font_size,
const CFX_Matrix& mtText2User,
const CFX_Matrix* pUser2Device,
const CFX_GraphStateData* pGraphState,
uint32_t fill_color,
FX_ARGB stroke_color,
CFX_Path* pClippingPath,
const CFX_FillRenderOptions& fill_options) {
for (const auto& charpos : pCharPos) {
const CFX_Path* pPath =
font->LoadGlyphPath(charpos.glyph_index_, charpos.font_char_width_);
if (!pPath) {
continue;
}
CFX_Matrix matrix(font_size, 0, 0, font_size, charpos.origin_.x,
charpos.origin_.y);
matrix = charpos.GetEffectiveMatrix(matrix);
matrix.Concat(mtText2User);
CFX_Path transformed_path(*pPath);
transformed_path.Transform(matrix);
if (fill_color || stroke_color) {
CFX_FillRenderOptions options(fill_options);
if (fill_color) {
options.fill_type = CFX_FillRenderOptions::FillType::kWinding;
}
options.text_mode = true;
if (!DrawPath(transformed_path, pUser2Device, pGraphState, fill_color,
stroke_color, options)) {
return false;
}
}
if (pClippingPath) {
pClippingPath->Append(transformed_path, pUser2Device);
}
}
return true;
}
void CFX_RenderDevice::DrawFillRect(const CFX_Matrix* pUser2Device,
const CFX_FloatRect& rect,
const FX_COLORREF& color) {
CFX_Path path;
path.AppendFloatRect(rect);
DrawPath(path, pUser2Device, nullptr, color, 0,
CFX_FillRenderOptions::WindingOptions());
}
void CFX_RenderDevice::DrawFillArea(const CFX_Matrix& mtUser2Device,
const std::vector<CFX_PointF>& points,
const FX_COLORREF& color) {
DCHECK(!points.empty());
CFX_Path path;
path.AppendPoint(points[0], CFX_Path::Point::Type::kMove);
for (size_t i = 1; i < points.size(); ++i) {
path.AppendPoint(points[i], CFX_Path::Point::Type::kLine);
}
DrawPath(path, &mtUser2Device, nullptr, color, 0,
CFX_FillRenderOptions::EvenOddOptions());
}
void CFX_RenderDevice::DrawStrokeRect(const CFX_Matrix& mtUser2Device,
const CFX_FloatRect& rect,
const FX_COLORREF& color,
float fWidth) {
CFX_GraphStateData gsd;
gsd.set_line_width(fWidth);
CFX_Path path;
path.AppendFloatRect(rect);
DrawPath(path, &mtUser2Device, &gsd, 0, color,
CFX_FillRenderOptions::EvenOddOptions());
}
void CFX_RenderDevice::DrawStrokeLine(const CFX_Matrix* pUser2Device,
const CFX_PointF& ptMoveTo,
const CFX_PointF& ptLineTo,
const FX_COLORREF& color,
float fWidth) {
CFX_Path path;
path.AppendPoint(ptMoveTo, CFX_Path::Point::Type::kMove);
path.AppendPoint(ptLineTo, CFX_Path::Point::Type::kLine);
CFX_GraphStateData gsd;
gsd.set_line_width(fWidth);
DrawPath(path, pUser2Device, &gsd, 0, color,
CFX_FillRenderOptions::EvenOddOptions());
}
void CFX_RenderDevice::DrawFillRect(const CFX_Matrix* pUser2Device,
const CFX_FloatRect& rect,
const CFX_Color& color,
int32_t nTransparency) {
DrawFillRect(pUser2Device, rect, color.ToFXColor(nTransparency));
}
void CFX_RenderDevice::DrawShadow(const CFX_Matrix& mtUser2Device,
const CFX_FloatRect& rect,
int32_t nTransparency,
int32_t nStartGray,
int32_t nEndGray) {
static constexpr float kBorder = 0.5f;
static constexpr float kSegmentWidth = 1.0f;
static constexpr float kLineWidth = 1.5f;
float fStepGray = (nEndGray - nStartGray) / rect.Height();
CFX_PointF start(rect.left, 0);
CFX_PointF end(rect.right, 0);
for (float fy = rect.bottom + kBorder; fy <= rect.top - kBorder;
fy += kSegmentWidth) {
start.y = fy;
end.y = fy;
int nGray = nStartGray + static_cast<int>(fStepGray * (fy - rect.bottom));
FX_ARGB color = ArgbEncode(nTransparency, nGray, nGray, nGray);
DrawStrokeLine(&mtUser2Device, start, end, color, kLineWidth);
}
}
void CFX_RenderDevice::DrawBorder(const CFX_Matrix* pUser2Device,
const CFX_FloatRect& rect,
float fWidth,
const CFX_Color& color,
const CFX_Color& crLeftTop,
const CFX_Color& crRightBottom,
BorderStyle nStyle,
int32_t nTransparency) {
if (fWidth <= 0.0f) {
return;
}
const float fLeft = rect.left;
const float fRight = rect.right;
const float fTop = rect.top;
const float fBottom = rect.bottom;
const float fHalfWidth = fWidth / 2.0f;
switch (nStyle) {
case BorderStyle::kSolid: {
CFX_Path path;
path.AppendRect(fLeft, fBottom, fRight, fTop);
path.AppendRect(fLeft + fWidth, fBottom + fWidth, fRight - fWidth,
fTop - fWidth);
DrawPath(path, pUser2Device, nullptr, color.ToFXColor(nTransparency), 0,
CFX_FillRenderOptions::EvenOddOptions());
break;
}
case BorderStyle::kDash: {
CFX_GraphStateData gsd;
gsd.set_dash_array({3.0f, 3.0f});
gsd.set_line_width(fWidth);
CFX_Path path;
path.AppendPoint(CFX_PointF(fLeft + fHalfWidth, fBottom + fHalfWidth),
CFX_Path::Point::Type::kMove);
path.AppendPoint(CFX_PointF(fLeft + fHalfWidth, fTop - fHalfWidth),
CFX_Path::Point::Type::kLine);
path.AppendPoint(CFX_PointF(fRight - fHalfWidth, fTop - fHalfWidth),
CFX_Path::Point::Type::kLine);
path.AppendPoint(CFX_PointF(fRight - fHalfWidth, fBottom + fHalfWidth),
CFX_Path::Point::Type::kLine);
path.AppendPoint(CFX_PointF(fLeft + fHalfWidth, fBottom + fHalfWidth),
CFX_Path::Point::Type::kLine);
DrawPath(path, pUser2Device, &gsd, 0, color.ToFXColor(nTransparency),
CFX_FillRenderOptions::WindingOptions());
break;
}
case BorderStyle::kBeveled:
case BorderStyle::kInset: {
CFX_GraphStateData gsd;
gsd.set_line_width(fHalfWidth);
CFX_Path path_left_top;
path_left_top.AppendPoint(
CFX_PointF(fLeft + fHalfWidth, fBottom + fHalfWidth),
CFX_Path::Point::Type::kMove);
path_left_top.AppendPoint(
CFX_PointF(fLeft + fHalfWidth, fTop - fHalfWidth),
CFX_Path::Point::Type::kLine);
path_left_top.AppendPoint(
CFX_PointF(fRight - fHalfWidth, fTop - fHalfWidth),
CFX_Path::Point::Type::kLine);
path_left_top.AppendPoint(CFX_PointF(fRight - fWidth, fTop - fWidth),
CFX_Path::Point::Type::kLine);
path_left_top.AppendPoint(CFX_PointF(fLeft + fWidth, fTop - fWidth),
CFX_Path::Point::Type::kLine);
path_left_top.AppendPoint(CFX_PointF(fLeft + fWidth, fBottom + fWidth),
CFX_Path::Point::Type::kLine);
path_left_top.AppendPoint(
CFX_PointF(fLeft + fHalfWidth, fBottom + fHalfWidth),
CFX_Path::Point::Type::kLine);
DrawPath(path_left_top, pUser2Device, &gsd,
crLeftTop.ToFXColor(nTransparency), 0,
CFX_FillRenderOptions::EvenOddOptions());
CFX_Path path_right_bottom;
path_right_bottom.AppendPoint(
CFX_PointF(fRight - fHalfWidth, fTop - fHalfWidth),
CFX_Path::Point::Type::kMove);
path_right_bottom.AppendPoint(
CFX_PointF(fRight - fHalfWidth, fBottom + fHalfWidth),
CFX_Path::Point::Type::kLine);
path_right_bottom.AppendPoint(
CFX_PointF(fLeft + fHalfWidth, fBottom + fHalfWidth),
CFX_Path::Point::Type::kLine);
path_right_bottom.AppendPoint(
CFX_PointF(fLeft + fWidth, fBottom + fWidth),
CFX_Path::Point::Type::kLine);
path_right_bottom.AppendPoint(
CFX_PointF(fRight - fWidth, fBottom + fWidth),
CFX_Path::Point::Type::kLine);
path_right_bottom.AppendPoint(CFX_PointF(fRight - fWidth, fTop - fWidth),
CFX_Path::Point::Type::kLine);
path_right_bottom.AppendPoint(
CFX_PointF(fRight - fHalfWidth, fTop - fHalfWidth),
CFX_Path::Point::Type::kLine);
DrawPath(path_right_bottom, pUser2Device, &gsd,
crRightBottom.ToFXColor(nTransparency), 0,
CFX_FillRenderOptions::EvenOddOptions());
CFX_Path path;
path.AppendRect(fLeft, fBottom, fRight, fTop);
path.AppendRect(fLeft + fHalfWidth, fBottom + fHalfWidth,
fRight - fHalfWidth, fTop - fHalfWidth);
DrawPath(path, pUser2Device, &gsd, color.ToFXColor(nTransparency), 0,
CFX_FillRenderOptions::EvenOddOptions());
break;
}
case BorderStyle::kUnderline: {
CFX_GraphStateData gsd;
gsd.set_line_width(fWidth);
CFX_Path path;
path.AppendPoint(CFX_PointF(fLeft, fBottom + fHalfWidth),
CFX_Path::Point::Type::kMove);
path.AppendPoint(CFX_PointF(fRight, fBottom + fHalfWidth),
CFX_Path::Point::Type::kLine);
DrawPath(path, pUser2Device, &gsd, 0, color.ToFXColor(nTransparency),
CFX_FillRenderOptions::EvenOddOptions());
break;
}
}
}
bool CFX_RenderDevice::MultiplyAlpha(float alpha) {
return device_driver_->MultiplyAlpha(alpha);
}
bool CFX_RenderDevice::MultiplyAlphaMask(RetainPtr<const CFX_DIBitmap> mask) {
return device_driver_->MultiplyAlphaMask(std::move(mask));
}
CFX_RenderDevice::StateRestorer::StateRestorer(CFX_RenderDevice* pDevice)
: device_(pDevice) {
device_->SaveState();
}
CFX_RenderDevice::StateRestorer::~StateRestorer() {
device_->RestoreState(false);
}