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pdfium/pdfium.git/8aa3c2cf1442768b793f4cd2eb4d76e817d2f617/./core/fpdfapi/render/cpdf_renderstatus.cpp
blob: 403bdd48768bd144a97aa7795e7e1b0e15a07823 [file]
// Copyright 2016 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "core/fpdfapi/render/cpdf_renderstatus.h"
#include <algorithm>
#include <array>
#include <cmath>
#include <limits>
#include <memory>
#include <utility>
#include <vector>
#include "build/build_config.h"
#include "constants/transparency.h"
#include "core/fpdfapi/font/cpdf_font.h"
#include "core/fpdfapi/font/cpdf_type3char.h"
#include "core/fpdfapi/font/cpdf_type3font.h"
#include "core/fpdfapi/page/cpdf_docpagedata.h"
#include "core/fpdfapi/page/cpdf_form.h"
#include "core/fpdfapi/page/cpdf_formobject.h"
#include "core/fpdfapi/page/cpdf_function.h"
#include "core/fpdfapi/page/cpdf_graphicstates.h"
#include "core/fpdfapi/page/cpdf_image.h"
#include "core/fpdfapi/page/cpdf_imageobject.h"
#include "core/fpdfapi/page/cpdf_meshstream.h"
#include "core/fpdfapi/page/cpdf_occontext.h"
#include "core/fpdfapi/page/cpdf_page.h"
#include "core/fpdfapi/page/cpdf_pageobject.h"
#include "core/fpdfapi/page/cpdf_pathobject.h"
#include "core/fpdfapi/page/cpdf_shadingobject.h"
#include "core/fpdfapi/page/cpdf_shadingpattern.h"
#include "core/fpdfapi/page/cpdf_textobject.h"
#include "core/fpdfapi/page/cpdf_tilingpattern.h"
#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_document.h"
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fpdfapi/parser/fpdf_parser_utility.h"
#include "core/fpdfapi/render/cpdf_charposlist.h"
#include "core/fpdfapi/render/cpdf_devicebuffer.h"
#include "core/fpdfapi/render/cpdf_dibbase.h"
#include "core/fpdfapi/render/cpdf_docrenderdata.h"
#include "core/fpdfapi/render/cpdf_imagerenderer.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_scaledrenderbuffer.h"
#include "core/fpdfapi/render/cpdf_textrenderer.h"
#include "core/fpdfapi/render/cpdf_transferfunc.h"
#include "core/fpdfapi/render/cpdf_type3cache.h"
#include "core/fxcrt/autorestorer.h"
#include "core/fxcrt/fx_safe_types.h"
#include "core/fxcrt/fx_system.h"
#include "core/fxcrt/maybe_owned.h"
#include "core/fxge/cfx_defaultrenderdevice.h"
#include "core/fxge/cfx_glyphbitmap.h"
#include "core/fxge/cfx_graphstatedata.h"
#include "core/fxge/cfx_pathdata.h"
#include "core/fxge/cfx_renderdevice.h"
#include "core/fxge/dib/cfx_dibitmap.h"
#include "core/fxge/fx_font.h"
#include "core/fxge/renderdevicedriver_iface.h"
#include "core/fxge/text_glyph_pos.h"
#include "third_party/base/compiler_specific.h"
#include "third_party/base/logging.h"
#include "third_party/base/numerics/safe_math.h"
#include "third_party/base/ptr_util.h"
#include "third_party/base/stl_util.h"
#ifdef _SKIA_SUPPORT_
#include "core/fxge/skia/fx_skia_device.h"
#endif
namespace {
constexpr int kShadingSteps = 256;
constexpr int kRenderMaxRecursionDepth = 64;
int g_CurrentRecursionDepth = 0;
void ReleaseCachedType3(CPDF_Type3Font* pFont) {
CPDF_Document* pDoc = pFont->GetDocument();
CPDF_DocRenderData::FromDocument(pDoc)->MaybePurgeCachedType3(pFont);
CPDF_DocPageData::FromDocument(pDoc)->ReleaseFont(pFont->GetFontDict());
}
class CPDF_RefType3Cache {
public:
explicit CPDF_RefType3Cache(CPDF_Type3Font* pType3Font)
: m_pType3Font(pType3Font) {}
~CPDF_RefType3Cache() {
while (m_dwCount--)
ReleaseCachedType3(m_pType3Font.Get());
}
uint32_t m_dwCount = 0;
UnownedPtr<CPDF_Type3Font> const m_pType3Font;
};
uint32_t CountOutputsFromFunctions(
const std::vector<std::unique_ptr<CPDF_Function>>& funcs) {
FX_SAFE_UINT32 total = 0;
for (const auto& func : funcs) {
if (func)
total += func->CountOutputs();
}
return total.ValueOrDefault(0);
}
uint32_t GetValidatedOutputsCount(
const std::vector<std::unique_ptr<CPDF_Function>>& funcs,
const RetainPtr<CPDF_ColorSpace>& pCS) {
uint32_t funcs_outputs = CountOutputsFromFunctions(funcs);
return funcs_outputs ? std::max(funcs_outputs, pCS->CountComponents()) : 0;
}
std::array<FX_ARGB, kShadingSteps> GetShadingSteps(
float t_min,
float t_max,
const std::vector<std::unique_ptr<CPDF_Function>>& funcs,
const RetainPtr<CPDF_ColorSpace>& pCS,
int alpha,
size_t results_count) {
ASSERT(results_count >= CountOutputsFromFunctions(funcs));
ASSERT(results_count >= pCS->CountComponents());
std::array<FX_ARGB, kShadingSteps> shading_steps;
std::vector<float> result_array(results_count);
float diff = t_max - t_min;
for (int i = 0; i < kShadingSteps; ++i) {
float input = diff * i / kShadingSteps + t_min;
int offset = 0;
for (const auto& func : funcs) {
if (func) {
int nresults = 0;
if (func->Call(&input, 1, &result_array[offset], &nresults))
offset += nresults;
}
}
float R = 0.0f;
float G = 0.0f;
float B = 0.0f;
pCS->GetRGB(result_array.data(), &R, &G, &B);
shading_steps[i] =
FXARGB_TODIB(ArgbEncode(alpha, FXSYS_round(R * 255),
FXSYS_round(G * 255), FXSYS_round(B * 255)));
}
return shading_steps;
}
void DrawAxialShading(const RetainPtr<CFX_DIBitmap>& pBitmap,
const CFX_Matrix& mtObject2Bitmap,
const CPDF_Dictionary* pDict,
const std::vector<std::unique_ptr<CPDF_Function>>& funcs,
const RetainPtr<CPDF_ColorSpace>& pCS,
int alpha) {
ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
const uint32_t total_results = GetValidatedOutputsCount(funcs, pCS);
if (total_results == 0)
return;
const CPDF_Array* pCoords = pDict->GetArrayFor("Coords");
if (!pCoords)
return;
float start_x = pCoords->GetNumberAt(0);
float start_y = pCoords->GetNumberAt(1);
float end_x = pCoords->GetNumberAt(2);
float end_y = pCoords->GetNumberAt(3);
float t_min = 0;
float t_max = 1.0f;
const CPDF_Array* pArray = pDict->GetArrayFor("Domain");
if (pArray) {
t_min = pArray->GetNumberAt(0);
t_max = pArray->GetNumberAt(1);
}
bool bStartExtend = false;
bool bEndExtend = false;
pArray = pDict->GetArrayFor("Extend");
if (pArray) {
bStartExtend = !!pArray->GetIntegerAt(0);
bEndExtend = !!pArray->GetIntegerAt(1);
}
int width = pBitmap->GetWidth();
int height = pBitmap->GetHeight();
float x_span = end_x - start_x;
float y_span = end_y - start_y;
float axis_len_square = (x_span * x_span) + (y_span * y_span);
std::array<FX_ARGB, kShadingSteps> shading_steps =
GetShadingSteps(t_min, t_max, funcs, pCS, alpha, total_results);
int pitch = pBitmap->GetPitch();
CFX_Matrix matrix = mtObject2Bitmap.GetInverse();
for (int row = 0; row < height; row++) {
uint32_t* dib_buf =
reinterpret_cast<uint32_t*>(pBitmap->GetBuffer() + row * pitch);
for (int column = 0; column < width; column++) {
CFX_PointF pos = matrix.Transform(
CFX_PointF(static_cast<float>(column), static_cast<float>(row)));
float scale =
(((pos.x - start_x) * x_span) + ((pos.y - start_y) * y_span)) /
axis_len_square;
int index = (int32_t)(scale * (kShadingSteps - 1));
if (index < 0) {
if (!bStartExtend)
continue;
index = 0;
} else if (index >= kShadingSteps) {
if (!bEndExtend)
continue;
index = kShadingSteps - 1;
}
dib_buf[column] = shading_steps[index];
}
}
}
void DrawRadialShading(const RetainPtr<CFX_DIBitmap>& pBitmap,
const CFX_Matrix& mtObject2Bitmap,
const CPDF_Dictionary* pDict,
const std::vector<std::unique_ptr<CPDF_Function>>& funcs,
const RetainPtr<CPDF_ColorSpace>& pCS,
int alpha) {
ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
const uint32_t total_results = GetValidatedOutputsCount(funcs, pCS);
if (total_results == 0)
return;
const CPDF_Array* pCoords = pDict->GetArrayFor("Coords");
if (!pCoords)
return;
float start_x = pCoords->GetNumberAt(0);
float start_y = pCoords->GetNumberAt(1);
float start_r = pCoords->GetNumberAt(2);
float end_x = pCoords->GetNumberAt(3);
float end_y = pCoords->GetNumberAt(4);
float end_r = pCoords->GetNumberAt(5);
float t_min = 0;
float t_max = 1.0f;
const CPDF_Array* pArray = pDict->GetArrayFor("Domain");
if (pArray) {
t_min = pArray->GetNumberAt(0);
t_max = pArray->GetNumberAt(1);
}
bool bStartExtend = false;
bool bEndExtend = false;
pArray = pDict->GetArrayFor("Extend");
if (pArray) {
bStartExtend = !!pArray->GetIntegerAt(0);
bEndExtend = !!pArray->GetIntegerAt(1);
}
std::array<FX_ARGB, kShadingSteps> shading_steps =
GetShadingSteps(t_min, t_max, funcs, pCS, alpha, total_results);
const float dx = end_x - start_x;
const float dy = end_y - start_y;
const float dr = end_r - start_r;
const float a = dx * dx + dy * dy - dr * dr;
const bool a_is_float_zero = IsFloatZero(a);
int width = pBitmap->GetWidth();
int height = pBitmap->GetHeight();
int pitch = pBitmap->GetPitch();
bool bDecreasing =
(dr < 0 && static_cast<int>(sqrt(dx * dx + dy * dy)) < -dr);
CFX_Matrix matrix = mtObject2Bitmap.GetInverse();
for (int row = 0; row < height; row++) {
uint32_t* dib_buf =
reinterpret_cast<uint32_t*>(pBitmap->GetBuffer() + row * pitch);
for (int column = 0; column < width; column++) {
CFX_PointF pos = matrix.Transform(
CFX_PointF(static_cast<float>(column), static_cast<float>(row)));
float pos_dx = pos.x - start_x;
float pos_dy = pos.y - start_y;
float b = -2 * (pos_dx * dx + pos_dy * dy + start_r * dr);
float c = pos_dx * pos_dx + pos_dy * pos_dy - start_r * start_r;
float s;
if (IsFloatZero(b)) {
s = sqrt(-c / a);
} else if (a_is_float_zero) {
s = -c / b;
} else {
float b2_4ac = (b * b) - 4 * (a * c);
if (b2_4ac < 0)
continue;
float root = sqrt(b2_4ac);
float s1 = (-b - root) / (2 * a);
float s2 = (-b + root) / (2 * a);
if (a <= 0)
std::swap(s1, s2);
if (bDecreasing)
s = (s1 >= 0 || bStartExtend) ? s1 : s2;
else
s = (s2 <= 1.0f || bEndExtend) ? s2 : s1;
if (start_r + s * dr < 0)
continue;
}
int index = static_cast<int32_t>(s * (kShadingSteps - 1));
if (index < 0) {
if (!bStartExtend)
continue;
index = 0;
} else if (index >= kShadingSteps) {
if (!bEndExtend)
continue;
index = kShadingSteps - 1;
}
dib_buf[column] = shading_steps[index];
}
}
}
void DrawFuncShading(const RetainPtr<CFX_DIBitmap>& pBitmap,
const CFX_Matrix& mtObject2Bitmap,
const CPDF_Dictionary* pDict,
const std::vector<std::unique_ptr<CPDF_Function>>& funcs,
const RetainPtr<CPDF_ColorSpace>& pCS,
int alpha) {
ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
const uint32_t total_results = GetValidatedOutputsCount(funcs, pCS);
if (total_results == 0)
return;
const CPDF_Array* pDomain = pDict->GetArrayFor("Domain");
float xmin = 0.0f;
float ymin = 0.0f;
float xmax = 1.0f;
float ymax = 1.0f;
if (pDomain) {
xmin = pDomain->GetNumberAt(0);
xmax = pDomain->GetNumberAt(1);
ymin = pDomain->GetNumberAt(2);
ymax = pDomain->GetNumberAt(3);
}
CFX_Matrix mtDomain2Target = pDict->GetMatrixFor("Matrix");
CFX_Matrix matrix =
mtObject2Bitmap.GetInverse() * mtDomain2Target.GetInverse();
int width = pBitmap->GetWidth();
int height = pBitmap->GetHeight();
int pitch = pBitmap->GetPitch();
ASSERT(total_results >= CountOutputsFromFunctions(funcs));
ASSERT(total_results >= pCS->CountComponents());
std::vector<float> result_array(total_results);
for (int row = 0; row < height; ++row) {
uint32_t* dib_buf = (uint32_t*)(pBitmap->GetBuffer() + row * pitch);
for (int column = 0; column < width; column++) {
CFX_PointF pos = matrix.Transform(
CFX_PointF(static_cast<float>(column), static_cast<float>(row)));
if (pos.x < xmin || pos.x > xmax || pos.y < ymin || pos.y > ymax)
continue;
float input[] = {pos.x, pos.y};
int offset = 0;
for (const auto& func : funcs) {
if (func) {
int nresults;
if (func->Call(input, 2, &result_array[offset], &nresults))
offset += nresults;
}
}
float R = 0.0f;
float G = 0.0f;
float B = 0.0f;
pCS->GetRGB(result_array.data(), &R, &G, &B);
dib_buf[column] = FXARGB_TODIB(ArgbEncode(
alpha, (int32_t)(R * 255), (int32_t)(G * 255), (int32_t)(B * 255)));
}
}
}
bool GetScanlineIntersect(int y,
const CFX_PointF& first,
const CFX_PointF& second,
float* x) {
if (first.y == second.y)
return false;
if (first.y < second.y) {
if (y < first.y || y > second.y)
return false;
} else if (y < second.y || y > first.y) {
return false;
}
*x = first.x + ((second.x - first.x) * (y - first.y) / (second.y - first.y));
return true;
}
void DrawGouraud(const RetainPtr<CFX_DIBitmap>& pBitmap,
int alpha,
CPDF_MeshVertex triangle[3]) {
float min_y = triangle[0].position.y;
float max_y = triangle[0].position.y;
for (int i = 1; i < 3; i++) {
min_y = std::min(min_y, triangle[i].position.y);
max_y = std::max(max_y, triangle[i].position.y);
}
if (min_y == max_y)
return;
int min_yi = std::max(static_cast<int>(floor(min_y)), 0);
int max_yi = static_cast<int>(ceil(max_y));
if (max_yi >= pBitmap->GetHeight())
max_yi = pBitmap->GetHeight() - 1;
for (int y = min_yi; y <= max_yi; y++) {
int nIntersects = 0;
float inter_x[3];
float r[3];
float g[3];
float b[3];
for (int i = 0; i < 3; i++) {
CPDF_MeshVertex& vertex1 = triangle[i];
CPDF_MeshVertex& vertex2 = triangle[(i + 1) % 3];
CFX_PointF& position1 = vertex1.position;
CFX_PointF& position2 = vertex2.position;
bool bIntersect =
GetScanlineIntersect(y, position1, position2, &inter_x[nIntersects]);
if (!bIntersect)
continue;
float y_dist = (y - position1.y) / (position2.y - position1.y);
r[nIntersects] = vertex1.r + ((vertex2.r - vertex1.r) * y_dist);
g[nIntersects] = vertex1.g + ((vertex2.g - vertex1.g) * y_dist);
b[nIntersects] = vertex1.b + ((vertex2.b - vertex1.b) * y_dist);
nIntersects++;
}
if (nIntersects != 2)
continue;
int min_x, max_x, start_index, end_index;
if (inter_x[0] < inter_x[1]) {
min_x = (int)floor(inter_x[0]);
max_x = (int)ceil(inter_x[1]);
start_index = 0;
end_index = 1;
} else {
min_x = (int)floor(inter_x[1]);
max_x = (int)ceil(inter_x[0]);
start_index = 1;
end_index = 0;
}
int start_x = std::max(min_x, 0);
int end_x = max_x;
if (end_x > pBitmap->GetWidth())
end_x = pBitmap->GetWidth();
uint8_t* dib_buf =
pBitmap->GetBuffer() + y * pBitmap->GetPitch() + start_x * 4;
float r_unit = (r[end_index] - r[start_index]) / (max_x - min_x);
float g_unit = (g[end_index] - g[start_index]) / (max_x - min_x);
float b_unit = (b[end_index] - b[start_index]) / (max_x - min_x);
float R = r[start_index] + (start_x - min_x) * r_unit;
float G = g[start_index] + (start_x - min_x) * g_unit;
float B = b[start_index] + (start_x - min_x) * b_unit;
for (int x = start_x; x < end_x; x++) {
R += r_unit;
G += g_unit;
B += b_unit;
FXARGB_SETDIB(dib_buf,
ArgbEncode(alpha, (int32_t)(R * 255), (int32_t)(G * 255),
(int32_t)(B * 255)));
dib_buf += 4;
}
}
}
void DrawFreeGouraudShading(
const RetainPtr<CFX_DIBitmap>& pBitmap,
const CFX_Matrix& mtObject2Bitmap,
const CPDF_Stream* pShadingStream,
const std::vector<std::unique_ptr<CPDF_Function>>& funcs,
const RetainPtr<CPDF_ColorSpace>& pCS,
int alpha) {
ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
CPDF_MeshStream stream(kFreeFormGouraudTriangleMeshShading, funcs,
pShadingStream, pCS);
if (!stream.Load())
return;
CPDF_MeshVertex triangle[3];
memset(triangle, 0, sizeof(triangle));
while (!stream.BitStream()->IsEOF()) {
CPDF_MeshVertex vertex;
uint32_t flag;
if (!stream.ReadVertex(mtObject2Bitmap, &vertex, &flag))
return;
if (flag == 0) {
triangle[0] = vertex;
for (int j = 1; j < 3; j++) {
uint32_t tflag;
if (!stream.ReadVertex(mtObject2Bitmap, &triangle[j], &tflag))
return;
}
} else {
if (flag == 1)
triangle[0] = triangle[1];
triangle[1] = triangle[2];
triangle[2] = vertex;
}
DrawGouraud(pBitmap, alpha, triangle);
}
}
void DrawLatticeGouraudShading(
const RetainPtr<CFX_DIBitmap>& pBitmap,
const CFX_Matrix& mtObject2Bitmap,
const CPDF_Stream* pShadingStream,
const std::vector<std::unique_ptr<CPDF_Function>>& funcs,
const RetainPtr<CPDF_ColorSpace>& pCS,
int alpha) {
ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
int row_verts = pShadingStream->GetDict()->GetIntegerFor("VerticesPerRow");
if (row_verts < 2)
return;
CPDF_MeshStream stream(kLatticeFormGouraudTriangleMeshShading, funcs,
pShadingStream, pCS);
if (!stream.Load())
return;
std::vector<CPDF_MeshVertex> vertices[2];
vertices[0] = stream.ReadVertexRow(mtObject2Bitmap, row_verts);
if (vertices[0].empty())
return;
int last_index = 0;
while (1) {
vertices[1 - last_index] = stream.ReadVertexRow(mtObject2Bitmap, row_verts);
if (vertices[1 - last_index].empty())
return;
CPDF_MeshVertex triangle[3];
for (int i = 1; i < row_verts; ++i) {
triangle[0] = vertices[last_index][i];
triangle[1] = vertices[1 - last_index][i - 1];
triangle[2] = vertices[last_index][i - 1];
DrawGouraud(pBitmap, alpha, triangle);
triangle[2] = vertices[1 - last_index][i];
DrawGouraud(pBitmap, alpha, triangle);
}
last_index = 1 - last_index;
}
}
struct Coon_BezierCoeff {
float a, b, c, d;
void FromPoints(float p0, float p1, float p2, float p3) {
a = -p0 + 3 * p1 - 3 * p2 + p3;
b = 3 * p0 - 6 * p1 + 3 * p2;
c = -3 * p0 + 3 * p1;
d = p0;
}
Coon_BezierCoeff first_half() {
Coon_BezierCoeff result;
result.a = a / 8;
result.b = b / 4;
result.c = c / 2;
result.d = d;
return result;
}
Coon_BezierCoeff second_half() {
Coon_BezierCoeff result;
result.a = a / 8;
result.b = 3 * a / 8 + b / 4;
result.c = 3 * a / 8 + b / 2 + c / 2;
result.d = a / 8 + b / 4 + c / 2 + d;
return result;
}
void GetPoints(float p[4]) {
p[0] = d;
p[1] = c / 3 + p[0];
p[2] = b / 3 - p[0] + 2 * p[1];
p[3] = a + p[0] - 3 * p[1] + 3 * p[2];
}
void GetPointsReverse(float p[4]) {
p[3] = d;
p[2] = c / 3 + p[3];
p[1] = b / 3 - p[3] + 2 * p[2];
p[0] = a + p[3] - 3 * p[2] + 3 * p[1];
}
void BezierInterpol(Coon_BezierCoeff& C1,
Coon_BezierCoeff& C2,
Coon_BezierCoeff& D1,
Coon_BezierCoeff& D2) {
a = (D1.a + D2.a) / 2;
b = (D1.b + D2.b) / 2;
c = (D1.c + D2.c) / 2 - (C1.a / 8 + C1.b / 4 + C1.c / 2) +
(C2.a / 8 + C2.b / 4) + (-C1.d + D2.d) / 2 - (C2.a + C2.b) / 2;
d = C1.a / 8 + C1.b / 4 + C1.c / 2 + C1.d;
}
float Distance() {
float dis = a + b + c;
return dis < 0 ? -dis : dis;
}
};
struct Coon_Bezier {
Coon_BezierCoeff x, y;
void FromPoints(float x0,
float y0,
float x1,
float y1,
float x2,
float y2,
float x3,
float y3) {
x.FromPoints(x0, x1, x2, x3);
y.FromPoints(y0, y1, y2, y3);
}
Coon_Bezier first_half() {
Coon_Bezier result;
result.x = x.first_half();
result.y = y.first_half();
return result;
}
Coon_Bezier second_half() {
Coon_Bezier result;
result.x = x.second_half();
result.y = y.second_half();
return result;
}
void BezierInterpol(Coon_Bezier& C1,
Coon_Bezier& C2,
Coon_Bezier& D1,
Coon_Bezier& D2) {
x.BezierInterpol(C1.x, C2.x, D1.x, D2.x);
y.BezierInterpol(C1.y, C2.y, D1.y, D2.y);
}
void GetPoints(std::vector<FX_PATHPOINT>& pPoints, size_t start_idx) {
float p[4];
int i;
x.GetPoints(p);
for (i = 0; i < 4; i++)
pPoints[start_idx + i].m_Point.x = p[i];
y.GetPoints(p);
for (i = 0; i < 4; i++)
pPoints[start_idx + i].m_Point.y = p[i];
}
void GetPointsReverse(std::vector<FX_PATHPOINT>& pPoints, size_t start_idx) {
float p[4];
int i;
x.GetPointsReverse(p);
for (i = 0; i < 4; i++)
pPoints[i + start_idx].m_Point.x = p[i];
y.GetPointsReverse(p);
for (i = 0; i < 4; i++)
pPoints[i + start_idx].m_Point.y = p[i];
}
float Distance() { return x.Distance() + y.Distance(); }
};
int Interpolate(int p1, int p2, int delta1, int delta2, bool* overflow) {
pdfium::base::CheckedNumeric<int> p = p2;
p -= p1;
p *= delta1;
p /= delta2;
p += p1;
if (!p.IsValid())
*overflow = true;
return p.ValueOrDefault(0);
}
int BiInterpolImpl(int c0,
int c1,
int c2,
int c3,
int x,
int y,
int x_scale,
int y_scale,
bool* overflow) {
int x1 = Interpolate(c0, c3, x, x_scale, overflow);
int x2 = Interpolate(c1, c2, x, x_scale, overflow);
return Interpolate(x1, x2, y, y_scale, overflow);
}
struct Coon_Color {
Coon_Color() { memset(comp, 0, sizeof(int) * 3); }
// Returns true if successful, false if overflow detected.
bool BiInterpol(Coon_Color colors[4],
int x,
int y,
int x_scale,
int y_scale) {
bool overflow = false;
for (int i = 0; i < 3; i++) {
comp[i] = BiInterpolImpl(colors[0].comp[i], colors[1].comp[i],
colors[2].comp[i], colors[3].comp[i], x, y,
x_scale, y_scale, &overflow);
}
return !overflow;
}
int Distance(Coon_Color& o) {
return std::max({abs(comp[0] - o.comp[0]), abs(comp[1] - o.comp[1]),
abs(comp[2] - o.comp[2])});
}
int comp[3];
};
#define COONCOLOR_THRESHOLD 4
struct CPDF_PatchDrawer {
void Draw(int x_scale,
int y_scale,
int left,
int bottom,
Coon_Bezier C1,
Coon_Bezier C2,
Coon_Bezier D1,
Coon_Bezier D2) {
bool bSmall = C1.Distance() < 2 && C2.Distance() < 2 && D1.Distance() < 2 &&
D2.Distance() < 2;
Coon_Color div_colors[4];
int d_bottom = 0;
int d_left = 0;
int d_top = 0;
int d_right = 0;
if (!div_colors[0].BiInterpol(patch_colors, left, bottom, x_scale,
y_scale)) {
return;
}
if (!bSmall) {
if (!div_colors[1].BiInterpol(patch_colors, left, bottom + 1, x_scale,
y_scale)) {
return;
}
if (!div_colors[2].BiInterpol(patch_colors, left + 1, bottom + 1, x_scale,
y_scale)) {
return;
}
if (!div_colors[3].BiInterpol(patch_colors, left + 1, bottom, x_scale,
y_scale)) {
return;
}
d_bottom = div_colors[3].Distance(div_colors[0]);
d_left = div_colors[1].Distance(div_colors[0]);
d_top = div_colors[1].Distance(div_colors[2]);
d_right = div_colors[2].Distance(div_colors[3]);
}
if (bSmall ||
(d_bottom < COONCOLOR_THRESHOLD && d_left < COONCOLOR_THRESHOLD &&
d_top < COONCOLOR_THRESHOLD && d_right < COONCOLOR_THRESHOLD)) {
std::vector<FX_PATHPOINT>& pPoints = path.GetPoints();
C1.GetPoints(pPoints, 0);
D2.GetPoints(pPoints, 3);
C2.GetPointsReverse(pPoints, 6);
D1.GetPointsReverse(pPoints, 9);
int fillFlags = FXFILL_WINDING | FXFILL_FULLCOVER;
if (bNoPathSmooth)
fillFlags |= FXFILL_NOPATHSMOOTH;
pDevice->DrawPath(
&path, nullptr, nullptr,
ArgbEncode(alpha, div_colors[0].comp[0], div_colors[0].comp[1],
div_colors[0].comp[2]),
0, fillFlags);
} else {
if (d_bottom < COONCOLOR_THRESHOLD && d_top < COONCOLOR_THRESHOLD) {
Coon_Bezier m1;
m1.BezierInterpol(D1, D2, C1, C2);
y_scale *= 2;
bottom *= 2;
Draw(x_scale, y_scale, left, bottom, C1, m1, D1.first_half(),
D2.first_half());
Draw(x_scale, y_scale, left, bottom + 1, m1, C2, D1.second_half(),
D2.second_half());
} else if (d_left < COONCOLOR_THRESHOLD &&
d_right < COONCOLOR_THRESHOLD) {
Coon_Bezier m2;
m2.BezierInterpol(C1, C2, D1, D2);
x_scale *= 2;
left *= 2;
Draw(x_scale, y_scale, left, bottom, C1.first_half(), C2.first_half(),
D1, m2);
Draw(x_scale, y_scale, left + 1, bottom, C1.second_half(),
C2.second_half(), m2, D2);
} else {
Coon_Bezier m1, m2;
m1.BezierInterpol(D1, D2, C1, C2);
m2.BezierInterpol(C1, C2, D1, D2);
Coon_Bezier m1f = m1.first_half();
Coon_Bezier m1s = m1.second_half();
Coon_Bezier m2f = m2.first_half();
Coon_Bezier m2s = m2.second_half();
x_scale *= 2;
y_scale *= 2;
left *= 2;
bottom *= 2;
Draw(x_scale, y_scale, left, bottom, C1.first_half(), m1f,
D1.first_half(), m2f);
Draw(x_scale, y_scale, left, bottom + 1, m1f, C2.first_half(),
D1.second_half(), m2s);
Draw(x_scale, y_scale, left + 1, bottom, C1.second_half(), m1s, m2f,
D2.first_half());
Draw(x_scale, y_scale, left + 1, bottom + 1, m1s, C2.second_half(), m2s,
D2.second_half());
}
}
}
int max_delta;
CFX_PathData path;
CFX_RenderDevice* pDevice;
int bNoPathSmooth;
int alpha;
Coon_Color patch_colors[4];
};
void DrawCoonPatchMeshes(
ShadingType type,
const RetainPtr<CFX_DIBitmap>& pBitmap,
const CFX_Matrix& mtObject2Bitmap,
const CPDF_Stream* pShadingStream,
const std::vector<std::unique_ptr<CPDF_Function>>& funcs,
const RetainPtr<CPDF_ColorSpace>& pCS,
bool bNoPathSmooth,
int alpha) {
ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
ASSERT(type == kCoonsPatchMeshShading ||
type == kTensorProductPatchMeshShading);
CFX_DefaultRenderDevice device;
device.Attach(pBitmap, false, nullptr, false);
CPDF_MeshStream stream(type, funcs, pShadingStream, pCS);
if (!stream.Load())
return;
CPDF_PatchDrawer patch;
patch.alpha = alpha;
patch.pDevice = &device;
patch.bNoPathSmooth = bNoPathSmooth;
for (int i = 0; i < 13; i++) {
patch.path.AppendPoint(
CFX_PointF(), i == 0 ? FXPT_TYPE::MoveTo : FXPT_TYPE::BezierTo, false);
}
CFX_PointF coords[16];
int point_count = type == kTensorProductPatchMeshShading ? 16 : 12;
while (!stream.BitStream()->IsEOF()) {
if (!stream.CanReadFlag())
break;
uint32_t flag = stream.ReadFlag();
int iStartPoint = 0, iStartColor = 0, i = 0;
if (flag) {
iStartPoint = 4;
iStartColor = 2;
CFX_PointF tempCoords[4];
for (i = 0; i < 4; i++) {
tempCoords[i] = coords[(flag * 3 + i) % 12];
}
memcpy(coords, tempCoords, sizeof(tempCoords));
Coon_Color tempColors[2];
tempColors[0] = patch.patch_colors[flag];
tempColors[1] = patch.patch_colors[(flag + 1) % 4];
memcpy(patch.patch_colors, tempColors, sizeof(Coon_Color) * 2);
}
for (i = iStartPoint; i < point_count; i++) {
if (!stream.CanReadCoords())
break;
coords[i] = mtObject2Bitmap.Transform(stream.ReadCoords());
}
for (i = iStartColor; i < 4; i++) {
if (!stream.CanReadColor())
break;
float r;
float g;
float b;
std::tie(r, g, b) = stream.ReadColor();
patch.patch_colors[i].comp[0] = (int32_t)(r * 255);
patch.patch_colors[i].comp[1] = (int32_t)(g * 255);
patch.patch_colors[i].comp[2] = (int32_t)(b * 255);
}
CFX_FloatRect bbox = CFX_FloatRect::GetBBox(coords, point_count);
if (bbox.right <= 0 || bbox.left >= (float)pBitmap->GetWidth() ||
bbox.top <= 0 || bbox.bottom >= (float)pBitmap->GetHeight()) {
continue;
}
Coon_Bezier C1, C2, D1, D2;
C1.FromPoints(coords[0].x, coords[0].y, coords[11].x, coords[11].y,
coords[10].x, coords[10].y, coords[9].x, coords[9].y);
C2.FromPoints(coords[3].x, coords[3].y, coords[4].x, coords[4].y,
coords[5].x, coords[5].y, coords[6].x, coords[6].y);
D1.FromPoints(coords[0].x, coords[0].y, coords[1].x, coords[1].y,
coords[2].x, coords[2].y, coords[3].x, coords[3].y);
D2.FromPoints(coords[9].x, coords[9].y, coords[8].x, coords[8].y,
coords[7].x, coords[7].y, coords[6].x, coords[6].y);
patch.Draw(1, 1, 0, 0, C1, C2, D1, D2);
}
}
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_Argb : FXDIB_8bppMask)) {
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, (float)width, (float)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, pCache);
context.AppendLayer(pPatternForm, &mtPattern2Bitmap);
context.Render(&bitmap_device, &options, nullptr);
#if defined _SKIA_SUPPORT_PATHS_
bitmap_device.Flush(true);
pBitmap->UnPreMultiply();
#endif
return pBitmap;
}
bool IsAvailableMatrix(const CFX_Matrix& matrix) {
if (matrix.a == 0 || matrix.d == 0)
return matrix.b != 0 && matrix.c != 0;
if (matrix.b == 0 || matrix.c == 0)
return matrix.a != 0 && matrix.d != 0;
return true;
}
bool MissingFillColor(const CPDF_ColorState* pColorState) {
return !pColorState->HasRef() || pColorState->GetFillColor()->IsNull();
}
bool MissingStrokeColor(const CPDF_ColorState* pColorState) {
return !pColorState->HasRef() || pColorState->GetStrokeColor()->IsNull();
}
bool Type3CharMissingFillColor(const CPDF_Type3Char* pChar,
const CPDF_ColorState* pColorState) {
return pChar && (!pChar->colored() ||
(pChar->colored() && MissingFillColor(pColorState)));
}
bool Type3CharMissingStrokeColor(const CPDF_Type3Char* pChar,
const CPDF_ColorState* pColorState) {
return pChar && (!pChar->colored() ||
(pChar->colored() && MissingStrokeColor(pColorState)));
}
} // namespace
CPDF_RenderStatus::CPDF_RenderStatus(CPDF_RenderContext* pContext,
CFX_RenderDevice* pDevice)
: m_pContext(pContext), m_pDevice(pDevice) {}
CPDF_RenderStatus::~CPDF_RenderStatus() {}
void CPDF_RenderStatus::Initialize(const CPDF_RenderStatus* pParentState,
const CPDF_GraphicStates* pInitialStates) {
m_bPrint = m_pDevice->GetDeviceClass() != FXDC_DISPLAY;
m_pPageResource.Reset(m_pContext->GetPageResources());
if (pInitialStates && !m_pType3Char) {
m_InitialStates.CopyStates(*pInitialStates);
if (pParentState) {
if (!m_InitialStates.m_ColorState.HasFillColor()) {
m_InitialStates.m_ColorState.SetFillColorRef(
pParentState->m_InitialStates.m_ColorState.GetFillColorRef());
*m_InitialStates.m_ColorState.GetMutableFillColor() =
*pParentState->m_InitialStates.m_ColorState.GetFillColor();
}
if (!m_InitialStates.m_ColorState.HasStrokeColor()) {
m_InitialStates.m_ColorState.SetStrokeColorRef(
pParentState->m_InitialStates.m_ColorState.GetFillColorRef());
*m_InitialStates.m_ColorState.GetMutableStrokeColor() =
*pParentState->m_InitialStates.m_ColorState.GetStrokeColor();
}
}
} else {
m_InitialStates.DefaultStates();
}
}
void CPDF_RenderStatus::RenderObjectList(
const CPDF_PageObjectHolder* pObjectHolder,
const CFX_Matrix& mtObj2Device) {
#if defined _SKIA_SUPPORT_
DebugVerifyDeviceIsPreMultiplied();
#endif
CFX_FloatRect clip_rect = mtObj2Device.GetInverse().TransformRect(
CFX_FloatRect(m_pDevice->GetClipBox()));
for (const auto& pCurObj : *pObjectHolder) {
if (pCurObj.get() == m_pStopObj) {
m_bStopped = true;
return;
}
if (!pCurObj)
continue;
if (pCurObj->GetRect().left > clip_rect.right ||
pCurObj->GetRect().right < clip_rect.left ||
pCurObj->GetRect().bottom > clip_rect.top ||
pCurObj->GetRect().top < clip_rect.bottom) {
continue;
}
RenderSingleObject(pCurObj.get(), mtObj2Device);
if (m_bStopped)
return;
}
#if defined _SKIA_SUPPORT_
DebugVerifyDeviceIsPreMultiplied();
#endif
}
void CPDF_RenderStatus::RenderSingleObject(CPDF_PageObject* pObj,
const CFX_Matrix& mtObj2Device) {
#if defined _SKIA_SUPPORT_
DebugVerifyDeviceIsPreMultiplied();
#endif
AutoRestorer<int> restorer(&g_CurrentRecursionDepth);
if (++g_CurrentRecursionDepth > kRenderMaxRecursionDepth) {
return;
}
m_pCurObj = pObj;
if (m_Options.GetOCContext() &&
!m_Options.GetOCContext()->CheckObjectVisible(pObj)) {
return;
}
ProcessClipPath(pObj->m_ClipPath, mtObj2Device);
if (ProcessTransparency(pObj, mtObj2Device)) {
return;
}
ProcessObjectNoClip(pObj, mtObj2Device);
#if defined _SKIA_SUPPORT_
DebugVerifyDeviceIsPreMultiplied();
#endif
}
bool CPDF_RenderStatus::ContinueSingleObject(CPDF_PageObject* pObj,
const CFX_Matrix& mtObj2Device,
PauseIndicatorIface* pPause) {
if (m_pImageRenderer) {
if (m_pImageRenderer->Continue(pPause))
return true;
if (!m_pImageRenderer->GetResult())
DrawObjWithBackground(pObj, mtObj2Device);
m_pImageRenderer.reset();
return false;
}
m_pCurObj = pObj;
if (m_Options.GetOCContext() &&
!m_Options.GetOCContext()->CheckObjectVisible(pObj)) {
return false;
}
ProcessClipPath(pObj->m_ClipPath, mtObj2Device);
if (ProcessTransparency(pObj, mtObj2Device))
return false;
if (!pObj->IsImage()) {
ProcessObjectNoClip(pObj, mtObj2Device);
return false;
}
m_pImageRenderer = pdfium::MakeUnique<CPDF_ImageRenderer>();
if (!m_pImageRenderer->Start(this, pObj->AsImage(), mtObj2Device, false,
BlendMode::kNormal)) {
if (!m_pImageRenderer->GetResult())
DrawObjWithBackground(pObj, mtObj2Device);
m_pImageRenderer.reset();
return false;
}
return ContinueSingleObject(pObj, mtObj2Device, pPause);
}
FX_RECT CPDF_RenderStatus::GetObjectClippedRect(
const CPDF_PageObject* pObj,
const CFX_Matrix& mtObj2Device) const {
FX_RECT rect = pObj->GetTransformedBBox(mtObj2Device);
rect.Intersect(m_pDevice->GetClipBox());
return rect;
}
void CPDF_RenderStatus::ProcessObjectNoClip(CPDF_PageObject* pObj,
const CFX_Matrix& mtObj2Device) {
#if defined _SKIA_SUPPORT_
DebugVerifyDeviceIsPreMultiplied();
#endif
bool bRet = false;
switch (pObj->GetType()) {
case CPDF_PageObject::TEXT:
bRet = ProcessText(pObj->AsText(), mtObj2Device, nullptr);
break;
case CPDF_PageObject::PATH:
bRet = ProcessPath(pObj->AsPath(), mtObj2Device);
break;
case CPDF_PageObject::IMAGE:
bRet = ProcessImage(pObj->AsImage(), mtObj2Device);
break;
case CPDF_PageObject::SHADING:
ProcessShading(pObj->AsShading(), mtObj2Device);
return;
case CPDF_PageObject::FORM:
bRet = ProcessForm(pObj->AsForm(), mtObj2Device);
break;
}
if (!bRet)
DrawObjWithBackground(pObj, mtObj2Device);
#if defined _SKIA_SUPPORT_
DebugVerifyDeviceIsPreMultiplied();
#endif
}
bool CPDF_RenderStatus::DrawObjWithBlend(CPDF_PageObject* pObj,
const CFX_Matrix& mtObj2Device) {
switch (pObj->GetType()) {
case CPDF_PageObject::PATH:
return ProcessPath(pObj->AsPath(), mtObj2Device);
case CPDF_PageObject::IMAGE:
return ProcessImage(pObj->AsImage(), mtObj2Device);
case CPDF_PageObject::FORM:
return ProcessForm(pObj->AsForm(), mtObj2Device);
default:
return false;
}
}
void CPDF_RenderStatus::DrawObjWithBackground(CPDF_PageObject* pObj,
const CFX_Matrix& mtObj2Device) {
FX_RECT rect = GetObjectClippedRect(pObj, mtObj2Device);
if (rect.IsEmpty())
return;
int res = 300;
if (pObj->IsImage() &&
m_pDevice->GetDeviceCaps(FXDC_DEVICE_CLASS) == FXDC_PRINTER) {
res = 0;
}
CPDF_ScaledRenderBuffer buffer;
if (!buffer.Initialize(m_pContext.Get(), m_pDevice, rect, pObj, &m_Options,
res)) {
return;
}
CFX_Matrix matrix = mtObj2Device * buffer.GetMatrix();
const CPDF_Dictionary* pFormResource = nullptr;
const CPDF_FormObject* pFormObj = pObj->AsForm();
if (pFormObj) {
const CPDF_Dictionary* pFormDict = pFormObj->form()->GetDict();
if (pFormDict)
pFormResource = pFormDict->GetDictFor("Resources");
}
CPDF_RenderStatus status(m_pContext.Get(), buffer.GetDevice());
status.SetOptions(m_Options);
status.SetDeviceMatrix(buffer.GetMatrix());
status.SetTransparency(m_Transparency);
status.SetDropObjects(m_bDropObjects);
status.SetFormResource(pFormResource);
status.Initialize(nullptr, nullptr);
status.RenderSingleObject(pObj, matrix);
buffer.OutputToDevice();
}
bool CPDF_RenderStatus::ProcessForm(const CPDF_FormObject* pFormObj,
const CFX_Matrix& mtObj2Device) {
#if defined _SKIA_SUPPORT_
DebugVerifyDeviceIsPreMultiplied();
#endif
const CPDF_Dictionary* pOC = pFormObj->form()->GetDict()->GetDictFor("OC");
if (pOC && m_Options.GetOCContext() &&
!m_Options.GetOCContext()->CheckOCGVisible(pOC)) {
return true;
}
CFX_Matrix matrix = pFormObj->form_matrix() * mtObj2Device;
const CPDF_Dictionary* pFormDict = pFormObj->form()->GetDict();
const CPDF_Dictionary* pResources =
pFormDict ? pFormDict->GetDictFor("Resources") : nullptr;
CPDF_RenderStatus status(m_pContext.Get(), m_pDevice);
status.SetOptions(m_Options);
status.SetStopObject(m_pStopObj.Get());
status.SetTransparency(m_Transparency);
status.SetDropObjects(m_bDropObjects);
status.SetFormResource(pResources);
status.Initialize(this, pFormObj);
status.m_curBlend = m_curBlend;
{
CFX_RenderDevice::StateRestorer restorer(m_pDevice);
status.RenderObjectList(pFormObj->form(), matrix);
m_bStopped = status.m_bStopped;
}
#if defined _SKIA_SUPPORT_
DebugVerifyDeviceIsPreMultiplied();
#endif
return true;
}
bool CPDF_RenderStatus::ProcessPath(CPDF_PathObject* pPathObj,
const CFX_Matrix& mtObj2Device) {
int FillType = pPathObj->filltype();
bool bStroke = pPathObj->stroke();
ProcessPathPattern(pPathObj, mtObj2Device, &FillType, &bStroke);
if (FillType == 0 && !bStroke)
return true;
uint32_t fill_argb = FillType ? GetFillArgb(pPathObj) : 0;
uint32_t stroke_argb = bStroke ? GetStrokeArgb(pPathObj) : 0;
CFX_Matrix path_matrix = pPathObj->matrix() * mtObj2Device;
if (!IsAvailableMatrix(path_matrix))
return true;
if (FillType && m_Options.GetOptions().bRectAA)
FillType |= FXFILL_RECT_AA;
if (m_Options.GetOptions().bFillFullcover)
FillType |= FXFILL_FULLCOVER;
if (m_Options.GetOptions().bNoPathSmooth)
FillType |= FXFILL_NOPATHSMOOTH;
if (bStroke)
FillType |= FX_FILL_STROKE;
const CPDF_PageObject* pPageObj =
static_cast<const CPDF_PageObject*>(pPathObj);
if (pPageObj->m_GeneralState.GetStrokeAdjust())
FillType |= FX_STROKE_ADJUST;
if (m_pType3Char)
FillType |= FX_FILL_TEXT_MODE;
CFX_GraphState graphState = pPathObj->m_GraphState;
if (m_Options.GetOptions().bThinLine)
graphState.SetLineWidth(0);
return m_pDevice->DrawPathWithBlend(
pPathObj->path().GetObject(), &path_matrix, graphState.GetObject(),
fill_argb, stroke_argb, FillType, m_curBlend);
}
RetainPtr<CPDF_TransferFunc> CPDF_RenderStatus::GetTransferFunc(
const CPDF_Object* pObj) const {
ASSERT(pObj);
auto* pDocCache = CPDF_DocRenderData::FromDocument(m_pContext->GetDocument());
return pDocCache ? pDocCache->GetTransferFunc(pObj) : nullptr;
}
FX_ARGB CPDF_RenderStatus::GetFillArgbInternal(CPDF_PageObject* pObj,
bool bType3) const {
const CPDF_ColorState* pColorState = &pObj->m_ColorState;
if (!bType3 && Type3CharMissingFillColor(m_pType3Char.Get(), pColorState))
return m_T3FillColor;
if (MissingFillColor(pColorState))
pColorState = &m_InitialStates.m_ColorState;
FX_COLORREF colorref = pColorState->GetFillColorRef();
if (colorref == 0xFFFFFFFF)
return 0;
int32_t alpha =
static_cast<int32_t>((pObj->m_GeneralState.GetFillAlpha() * 255));
if (pObj->m_GeneralState.GetTR()) {
if (!pObj->m_GeneralState.GetTransferFunc()) {
pObj->m_GeneralState.SetTransferFunc(
GetTransferFunc(pObj->m_GeneralState.GetTR()));
}
if (pObj->m_GeneralState.GetTransferFunc()) {
colorref =
pObj->m_GeneralState.GetTransferFunc()->TranslateColor(colorref);
}
}
return m_Options.TranslateColor(AlphaAndColorRefToArgb(alpha, colorref));
}
FX_ARGB CPDF_RenderStatus::GetStrokeArgb(CPDF_PageObject* pObj) const {
const CPDF_ColorState* pColorState = &pObj->m_ColorState;
if (Type3CharMissingStrokeColor(m_pType3Char.Get(), pColorState))
return m_T3FillColor;
if (MissingStrokeColor(pColorState))
pColorState = &m_InitialStates.m_ColorState;
FX_COLORREF colorref = pColorState->GetStrokeColorRef();
if (colorref == 0xFFFFFFFF)
return 0;
int32_t alpha = static_cast<int32_t>(pObj->m_GeneralState.GetStrokeAlpha() *
255); // not rounded.
if (pObj->m_GeneralState.GetTR()) {
if (!pObj->m_GeneralState.GetTransferFunc()) {
pObj->m_GeneralState.SetTransferFunc(
GetTransferFunc(pObj->m_GeneralState.GetTR()));
}
if (pObj->m_GeneralState.GetTransferFunc()) {
colorref =
pObj->m_GeneralState.GetTransferFunc()->TranslateColor(colorref);
}
}
return m_Options.TranslateColor(AlphaAndColorRefToArgb(alpha, colorref));
}
void CPDF_RenderStatus::ProcessClipPath(const CPDF_ClipPath& ClipPath,
const CFX_Matrix& mtObj2Device) {
if (!ClipPath.HasRef()) {
if (m_LastClipPath.HasRef()) {
m_pDevice->RestoreState(true);
m_LastClipPath.SetNull();
}
return;
}
if (m_LastClipPath == ClipPath)
return;
m_LastClipPath = ClipPath;
m_pDevice->RestoreState(true);
for (size_t i = 0; i < ClipPath.GetPathCount(); ++i) {
const CFX_PathData* pPathData = ClipPath.GetPath(i).GetObject();
if (!pPathData)
continue;
if (pPathData->GetPoints().empty()) {
CFX_PathData EmptyPath;
EmptyPath.AppendRect(-1, -1, 0, 0);
m_pDevice->SetClip_PathFill(&EmptyPath, nullptr, FXFILL_WINDING);
} else {
m_pDevice->SetClip_PathFill(pPathData, &mtObj2Device,
ClipPath.GetClipType(i));
}
}
if (ClipPath.GetTextCount() == 0)
return;
if (m_pDevice->GetDeviceClass() == FXDC_DISPLAY &&
!(m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_SOFT_CLIP)) {
return;
}
std::unique_ptr<CFX_PathData> pTextClippingPath;
for (size_t i = 0; i < ClipPath.GetTextCount(); ++i) {
CPDF_TextObject* pText = ClipPath.GetText(i);
if (pText) {
if (!pTextClippingPath)
pTextClippingPath = pdfium::MakeUnique<CFX_PathData>();
ProcessText(pText, mtObj2Device, pTextClippingPath.get());
continue;
}
if (!pTextClippingPath)
continue;
int fill_mode = FXFILL_WINDING;
if (m_Options.GetOptions().bNoTextSmooth)
fill_mode |= FXFILL_NOPATHSMOOTH;
m_pDevice->SetClip_PathFill(pTextClippingPath.get(), nullptr, fill_mode);
pTextClippingPath.reset();
}
}
bool CPDF_RenderStatus::ClipPattern(const CPDF_PageObject* pPageObj,
const CFX_Matrix& mtObj2Device,
bool bStroke) {
if (pPageObj->IsPath())
return SelectClipPath(pPageObj->AsPath(), mtObj2Device, bStroke);
if (pPageObj->IsImage()) {
m_pDevice->SetClip_Rect(pPageObj->GetTransformedBBox(mtObj2Device));
return true;
}
return false;
}
bool CPDF_RenderStatus::SelectClipPath(const CPDF_PathObject* pPathObj,
const CFX_Matrix& mtObj2Device,
bool bStroke) {
CFX_Matrix path_matrix = pPathObj->matrix() * mtObj2Device;
if (bStroke) {
CFX_GraphState graphState = pPathObj->m_GraphState;
if (m_Options.GetOptions().bThinLine)
graphState.SetLineWidth(0);
return m_pDevice->SetClip_PathStroke(pPathObj->path().GetObject(),
&path_matrix, graphState.GetObject());
}
int fill_mode = pPathObj->filltype();
if (m_Options.GetOptions().bNoPathSmooth) {
fill_mode |= FXFILL_NOPATHSMOOTH;
}
return m_pDevice->SetClip_PathFill(pPathObj->path().GetObject(), &path_matrix,
fill_mode);
}
bool CPDF_RenderStatus::ProcessTransparency(CPDF_PageObject* pPageObj,
const CFX_Matrix& mtObj2Device) {
#if defined _SKIA_SUPPORT_
DebugVerifyDeviceIsPreMultiplied();
#endif
BlendMode blend_type = pPageObj->m_GeneralState.GetBlendType();
CPDF_Dictionary* pSMaskDict =
ToDictionary(pPageObj->m_GeneralState.GetSoftMask());
if (pSMaskDict) {
if (pPageObj->IsImage() &&
pPageObj->AsImage()->GetImage()->GetDict()->KeyExist("SMask")) {
pSMaskDict = nullptr;
}
}
const CPDF_Dictionary* pFormResource = nullptr;
float group_alpha = 1.0f;
CPDF_Transparency transparency = m_Transparency;
bool bGroupTransparent = false;
const CPDF_FormObject* pFormObj = pPageObj->AsForm();
if (pFormObj) {
group_alpha = pFormObj->m_GeneralState.GetFillAlpha();
transparency = pFormObj->form()->GetTransparency();
bGroupTransparent = transparency.IsIsolated();
const CPDF_Dictionary* pFormDict = pFormObj->form()->GetDict();
if (pFormDict)
pFormResource = pFormDict->GetDictFor("Resources");
}
bool bTextClip =
(pPageObj->m_ClipPath.HasRef() &&
pPageObj->m_ClipPath.GetTextCount() > 0 &&
m_pDevice->GetDeviceClass() == FXDC_DISPLAY &&
!(m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_SOFT_CLIP));
if (m_Options.GetOptions().bOverprint && pPageObj->IsImage() &&
pPageObj->m_GeneralState.GetFillOP() &&
pPageObj->m_GeneralState.GetStrokeOP()) {
CPDF_Document* pDocument = nullptr;
CPDF_Page* pPage = nullptr;
if (m_pContext->GetPageCache()) {
pPage = m_pContext->GetPageCache()->GetPage();
pDocument = pPage->GetDocument();
} else {
pDocument = pPageObj->AsImage()->GetImage()->GetDocument();
}
const CPDF_Dictionary* pPageResources =
pPage ? pPage->m_pPageResources.Get() : nullptr;
const CPDF_Object* pCSObj = pPageObj->AsImage()
->GetImage()
->GetStream()
->GetDict()
->GetDirectObjectFor("ColorSpace");
RetainPtr<CPDF_ColorSpace> pColorSpace =
CPDF_DocPageData::FromDocument(pDocument)->GetColorSpace(
pCSObj, pPageResources);
if (pColorSpace) {
int format = pColorSpace->GetFamily();
if (format == PDFCS_DEVICECMYK || format == PDFCS_SEPARATION ||
format == PDFCS_DEVICEN) {
blend_type = BlendMode::kDarken;
}
}
}
if (!pSMaskDict && group_alpha == 1.0f && blend_type == BlendMode::kNormal &&
!bTextClip && !bGroupTransparent) {
return false;
}
if (m_bPrint) {
bool bRet = false;
int rendCaps = m_pDevice->GetRenderCaps();
if (!(transparency.IsIsolated() || pSMaskDict || bTextClip) &&
(rendCaps & FXRC_BLEND_MODE)) {
BlendMode oldBlend = m_curBlend;
m_curBlend = blend_type;
bRet = DrawObjWithBlend(pPageObj, mtObj2Device);
m_curBlend = oldBlend;
}
if (!bRet) {
DrawObjWithBackground(pPageObj, mtObj2Device);
}
return true;
}
FX_RECT rect = pPageObj->GetTransformedBBox(mtObj2Device);
rect.Intersect(m_pDevice->GetClipBox());
if (rect.IsEmpty())
return true;
int width = rect.Width();
int height = rect.Height();
CFX_DefaultRenderDevice bitmap_device;
RetainPtr<CFX_DIBitmap> backdrop;
if (!transparency.IsIsolated() &&
(m_pDevice->GetRenderCaps() & FXRC_GET_BITS)) {
backdrop = pdfium::MakeRetain<CFX_DIBitmap>();
if (!m_pDevice->CreateCompatibleBitmap(backdrop, width, height))
return true;
m_pDevice->GetDIBits(backdrop, rect.left, rect.top);
}
if (!bitmap_device.Create(width, height, FXDIB_Argb, backdrop))
return true;
RetainPtr<CFX_DIBitmap> bitmap = bitmap_device.GetBitmap();
bitmap->Clear(0);
CFX_Matrix new_matrix = mtObj2Device;
new_matrix.Translate(-rect.left, -rect.top);
RetainPtr<CFX_DIBitmap> pTextMask;
if (bTextClip) {
pTextMask = pdfium::MakeRetain<CFX_DIBitmap>();
if (!pTextMask->Create(width, height, FXDIB_8bppMask))
return true;
pTextMask->Clear(0);
CFX_DefaultRenderDevice text_device;
text_device.Attach(pTextMask, false, nullptr, false);
for (size_t i = 0; i < pPageObj->m_ClipPath.GetTextCount(); ++i) {
CPDF_TextObject* textobj = pPageObj->m_ClipPath.GetText(i);
if (!textobj)
break;
// TODO(thestig): Should we check the return value here?
CPDF_TextRenderer::DrawTextPath(
&text_device, textobj->GetCharCodes(), textobj->GetCharPositions(),
textobj->m_TextState.GetFont(), textobj->m_TextState.GetFontSize(),
textobj->GetTextMatrix(), &new_matrix,
textobj->m_GraphState.GetObject(), 0xffffffff, 0, nullptr, 0);
}
}
CPDF_RenderStatus bitmap_render(m_pContext.Get(), &bitmap_device);
bitmap_render.SetOptions(m_Options);
bitmap_render.SetStopObject(m_pStopObj.Get());
bitmap_render.SetStdCS(true);
bitmap_render.SetDropObjects(m_bDropObjects);
bitmap_render.SetFormResource(pFormResource);
bitmap_render.Initialize(nullptr, nullptr);
bitmap_render.ProcessObjectNoClip(pPageObj, new_matrix);
#if defined _SKIA_SUPPORT_PATHS_
bitmap_device.Flush(true);
bitmap->UnPreMultiply();
#endif
m_bStopped = bitmap_render.m_bStopped;
if (pSMaskDict) {
CFX_Matrix smask_matrix =
*pPageObj->m_GeneralState.GetSMaskMatrix() * mtObj2Device;
RetainPtr<CFX_DIBBase> pSMaskSource =
LoadSMask(pSMaskDict, &rect, &smask_matrix);
if (pSMaskSource)
bitmap->MultiplyAlpha(pSMaskSource);
}
if (pTextMask) {
bitmap->MultiplyAlpha(pTextMask);
pTextMask.Reset();
}
int32_t blitAlpha = 255;
if (group_alpha != 1.0f && transparency.IsGroup()) {
blitAlpha = (int32_t)(group_alpha * 255);
#ifndef _SKIA_SUPPORT_
bitmap->MultiplyAlpha(blitAlpha);
blitAlpha = 255;
#endif
}
transparency = m_Transparency;
if (pPageObj->IsForm()) {
transparency.SetGroup();
}
CompositeDIBitmap(bitmap, rect.left, rect.top, 0, blitAlpha, blend_type,
transparency);
#if defined _SKIA_SUPPORT_
DebugVerifyDeviceIsPreMultiplied();
#endif
return true;
}
RetainPtr<CFX_DIBitmap> CPDF_RenderStatus::GetBackdrop(
const CPDF_PageObject* pObj,
const FX_RECT& rect,
bool bBackAlphaRequired,
int* left,
int* top) {
FX_RECT bbox = rect;
bbox.Intersect(m_pDevice->GetClipBox());
*left = bbox.left;
*top = bbox.top;
int width = bbox.Width();
int height = bbox.Height();
auto pBackdrop = pdfium::MakeRetain<CFX_DIBitmap>();
if (bBackAlphaRequired && !m_bDropObjects)
pBackdrop->Create(width, height, FXDIB_Argb);
else
m_pDevice->CreateCompatibleBitmap(pBackdrop, width, height);
if (!pBackdrop->GetBuffer())
return nullptr;
bool bNeedDraw;
if (pBackdrop->HasAlpha())
bNeedDraw = !(m_pDevice->GetRenderCaps() & FXRC_ALPHA_OUTPUT);
else
bNeedDraw = !(m_pDevice->GetRenderCaps() & FXRC_GET_BITS);
if (!bNeedDraw) {
m_pDevice->GetDIBits(pBackdrop, *left, *top);
return pBackdrop;
}
CFX_Matrix FinalMatrix = m_DeviceMatrix;
FinalMatrix.Translate(-*left, -*top);
pBackdrop->Clear(pBackdrop->HasAlpha() ? 0 : 0xffffffff);
CFX_DefaultRenderDevice device;
device.Attach(pBackdrop, false, nullptr, false);
m_pContext->Render(&device, pObj, &m_Options, &FinalMatrix);
return pBackdrop;
}
std::unique_ptr<CPDF_GraphicStates> CPDF_RenderStatus::CloneObjStates(
const CPDF_GraphicStates* pSrcStates,
bool bStroke) {
if (!pSrcStates)
return nullptr;
auto pStates = pdfium::MakeUnique<CPDF_GraphicStates>();
pStates->CopyStates(*pSrcStates);
const CPDF_Color* pObjColor = bStroke
? pSrcStates->m_ColorState.GetStrokeColor()
: pSrcStates->m_ColorState.GetFillColor();
if (!pObjColor->IsNull()) {
pStates->m_ColorState.SetFillColorRef(
bStroke ? pSrcStates->m_ColorState.GetStrokeColorRef()
: pSrcStates->m_ColorState.GetFillColorRef());
pStates->m_ColorState.SetStrokeColorRef(
pStates->m_ColorState.GetFillColorRef());
}
return pStates;
}
#if defined _SKIA_SUPPORT_
void CPDF_RenderStatus::DebugVerifyDeviceIsPreMultiplied() const {
m_pDevice->DebugVerifyBitmapIsPreMultiplied();
}
#endif
bool CPDF_RenderStatus::ProcessText(CPDF_TextObject* textobj,
const CFX_Matrix& mtObj2Device,
CFX_PathData* pClippingPath) {
if (textobj->GetCharCodes().empty())
return true;
const TextRenderingMode text_render_mode = textobj->m_TextState.GetTextMode();
if (text_render_mode == TextRenderingMode::MODE_INVISIBLE)
return true;
CPDF_Font* pFont = textobj->m_TextState.GetFont();
if (pFont->IsType3Font())
return ProcessType3Text(textobj, mtObj2Device);
bool bFill = false;
bool bStroke = false;
bool bClip = false;
if (pClippingPath) {
bClip = true;
} else {
switch (text_render_mode) {
case TextRenderingMode::MODE_FILL:
case TextRenderingMode::MODE_FILL_CLIP:
bFill = true;
break;
case TextRenderingMode::MODE_STROKE:
case TextRenderingMode::MODE_STROKE_CLIP:
if (pFont->HasFace())
bStroke = true;
else
bFill = true;
break;
case TextRenderingMode::MODE_FILL_STROKE:
case TextRenderingMode::MODE_FILL_STROKE_CLIP:
bFill = true;
if (pFont->HasFace())
bStroke = true;
break;
case TextRenderingMode::MODE_INVISIBLE:
// Already handled above, but the compiler is not smart enough to
// realize it. Fall through.
NOTREACHED();
return true;
case TextRenderingMode::MODE_CLIP:
return true;
}
}
FX_ARGB stroke_argb = 0;
FX_ARGB fill_argb = 0;
bool bPattern = false;
if (bStroke) {
if (textobj->m_ColorState.GetStrokeColor()->IsPattern()) {
bPattern = true;
} else {
stroke_argb = GetStrokeArgb(textobj);
}
}
if (bFill) {
if (textobj->m_ColorState.GetFillColor()->IsPattern()) {
bPattern = true;
} else {
fill_argb = GetFillArgb(textobj);
}
}
CFX_Matrix text_matrix = textobj->GetTextMatrix();
if (!IsAvailableMatrix(text_matrix))
return true;
float font_size = textobj->m_TextState.GetFontSize();
if (bPattern) {
DrawTextPathWithPattern(textobj, mtObj2Device, pFont, font_size,
&text_matrix, bFill, bStroke);
return true;
}
if (bClip || bStroke) {
const CFX_Matrix* pDeviceMatrix = &mtObj2Device;
CFX_Matrix device_matrix;
if (bStroke) {
const float* pCTM = textobj->m_TextState.GetCTM();
if (pCTM[0] != 1.0f || pCTM[3] != 1.0f) {
CFX_Matrix ctm(pCTM[0], pCTM[1], pCTM[2], pCTM[3], 0, 0);
text_matrix *= ctm.GetInverse();
device_matrix = ctm * mtObj2Device;
pDeviceMatrix = &device_matrix;
}
}
int flag = 0;
if (bStroke && bFill) {
flag |= FX_FILL_STROKE;
flag |= FX_STROKE_TEXT_MODE;
}
if (textobj->m_GeneralState.GetStrokeAdjust())
flag |= FX_STROKE_ADJUST;
if (m_Options.GetOptions().bNoTextSmooth)
flag |= FXFILL_NOPATHSMOOTH;
return CPDF_TextRenderer::DrawTextPath(
m_pDevice, textobj->GetCharCodes(), textobj->GetCharPositions(), pFont,
font_size, text_matrix, pDeviceMatrix,
textobj->m_GraphState.GetObject(), fill_argb, stroke_argb,
pClippingPath, flag);
}
text_matrix.Concat(mtObj2Device);
return CPDF_TextRenderer::DrawNormalText(
m_pDevice, textobj->GetCharCodes(), textobj->GetCharPositions(), pFont,
font_size, text_matrix, fill_argb, m_Options);
}
RetainPtr<CPDF_Type3Cache> CPDF_RenderStatus::GetCachedType3(
CPDF_Type3Font* pFont) {
CPDF_Document* pDoc = pFont->GetDocument();
CPDF_DocPageData::FromDocument(pDoc)->GetFont(pFont->GetFontDict());
return CPDF_DocRenderData::FromDocument(pDoc)->GetCachedType3(pFont);
}
// TODO(npm): Font fallback for type 3 fonts? (Completely separate code!!)
bool CPDF_RenderStatus::ProcessType3Text(CPDF_TextObject* textobj,
const CFX_Matrix& mtObj2Device) {
CPDF_Type3Font* pType3Font = textobj->m_TextState.GetFont()->AsType3Font();
if (pdfium::ContainsValue(m_Type3FontCache, pType3Font))
return true;
int device_class = m_pDevice->GetDeviceClass();
FX_ARGB fill_argb = GetFillArgbForType3(textobj);
int fill_alpha = FXARGB_A(fill_argb);
if (device_class != FXDC_DISPLAY && fill_alpha < 255)
return false;
CFX_Matrix text_matrix = textobj->GetTextMatrix();
CFX_Matrix char_matrix = pType3Font->GetFontMatrix();
float font_size = textobj->m_TextState.GetFontSize();
char_matrix.Scale(font_size, font_size);
// Must come before |glyphs|, because |glyphs| points into |refTypeCache|.
CPDF_RefType3Cache refTypeCache(pType3Font);
std::vector<TextGlyphPos> glyphs;
if (device_class == FXDC_DISPLAY)
glyphs.resize(textobj->GetCharCodes().size());
for (size_t iChar = 0; iChar < textobj->GetCharCodes().size(); ++iChar) {
uint32_t charcode = textobj->GetCharCodes()[iChar];
if (charcode == static_cast<uint32_t>(-1))
continue;
CPDF_Type3Char* pType3Char = pType3Font->LoadChar(charcode);
if (!pType3Char)
continue;
CFX_Matrix matrix = char_matrix;
matrix.e += iChar > 0 ? textobj->GetCharPositions()[iChar - 1] : 0;
matrix.Concat(text_matrix);
matrix.Concat(mtObj2Device);
if (!pType3Char->LoadBitmap(m_pContext.Get())) {
if (!glyphs.empty()) {
for (size_t i = 0; i < iChar; ++i) {
const TextGlyphPos& glyph = glyphs[i];
if (!glyph.m_pGlyph)
continue;
Optional<CFX_Point> point = glyph.GetOrigin({0, 0});
if (!point.has_value())
continue;
m_pDevice->SetBitMask(glyph.m_pGlyph->GetBitmap(), point->x, point->y,
fill_argb);
}
glyphs.clear();
}
std::unique_ptr<CPDF_GraphicStates> pStates =
CloneObjStates(textobj, false);
CPDF_RenderOptions options = m_Options;
options.GetOptions().bForceHalftone = true;
options.GetOptions().bRectAA = true;
options.GetOptions().bForceDownsample = false;
const CPDF_Dictionary* pFormResource = nullptr;
if (pType3Char->form() && pType3Char->form()->GetDict()) {
pFormResource = pType3Char->form()->GetDict()->GetDictFor("Resources");
}
if (fill_alpha == 255) {
CPDF_RenderStatus status(m_pContext.Get(), m_pDevice);
status.SetOptions(options);
status.SetTransparency(pType3Char->form()->GetTransparency());
status.SetType3Char(pType3Char);
status.SetFillColor(fill_argb);
status.SetDropObjects(m_bDropObjects);
status.SetFormResource(pFormResource);
status.Initialize(this, pStates.get());
status.m_Type3FontCache = m_Type3FontCache;
status.m_Type3FontCache.push_back(pType3Font);
CFX_RenderDevice::StateRestorer restorer(m_pDevice);
status.RenderObjectList(pType3Char->form(), matrix);
} else {
FX_RECT rect =
matrix.TransformRect(pType3Char->form()->CalcBoundingBox())
.GetOuterRect();
if (!rect.Valid())
continue;
CFX_DefaultRenderDevice bitmap_device;
if (!bitmap_device.Create(rect.Width(), rect.Height(), FXDIB_Argb,
nullptr)) {
return true;
}
bitmap_device.GetBitmap()->Clear(0);
CPDF_RenderStatus status(m_pContext.Get(), &bitmap_device);
status.SetOptions(options);
status.SetTransparency(pType3Char->form()->GetTransparency());
status.SetType3Char(pType3Char);
status.SetFillColor(fill_argb);
status.SetDropObjects(m_bDropObjects);
status.SetFormResource(pFormResource);
status.Initialize(this, pStates.get());
status.m_Type3FontCache = m_Type3FontCache;
status.m_Type3FontCache.push_back(pType3Font);
matrix.Translate(-rect.left, -rect.top);
status.RenderObjectList(pType3Char->form(), matrix);
m_pDevice->SetDIBits(bitmap_device.GetBitmap(), rect.left, rect.top);
}
} else if (pType3Char->GetBitmap()) {
if (device_class == FXDC_DISPLAY) {
RetainPtr<CPDF_Type3Cache> pCache = GetCachedType3(pType3Font);
refTypeCache.m_dwCount++;
CFX_GlyphBitmap* pBitmap = pCache->LoadGlyph(charcode, &matrix);
if (!pBitmap)
continue;
CFX_Point origin(FXSYS_round(matrix.e), FXSYS_round(matrix.f));
if (glyphs.empty()) {
FX_SAFE_INT32 left = origin.x;
left += pBitmap->left();
if (!left.IsValid())
continue;
FX_SAFE_INT32 top = origin.y;
top -= pBitmap->top();
if (!top.IsValid())
continue;
m_pDevice->SetBitMask(pBitmap->GetBitmap(), left.ValueOrDie(),
top.ValueOrDie(), fill_argb);
} else {
glyphs[iChar].m_pGlyph = pBitmap;
glyphs[iChar].m_Origin = origin;
}
} else {
CFX_Matrix image_matrix = pType3Char->matrix() * matrix;
CPDF_ImageRenderer renderer;
if (renderer.Start(this, pType3Char->GetBitmap(), fill_argb, 255,
image_matrix, FXDIB_ResampleOptions(), false,
BlendMode::kNormal)) {
renderer.Continue(nullptr);
}
if (!renderer.GetResult())
return false;
}
}
}
if (glyphs.empty())
return true;
FX_RECT rect = GetGlyphsBBox(glyphs, 0);
auto pBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
if (!pBitmap->Create(rect.Width(), rect.Height(), FXDIB_8bppMask))
return true;
pBitmap->Clear(0);
for (const TextGlyphPos& glyph : glyphs) {
if (!glyph.m_pGlyph)
continue;
Optional<CFX_Point> point = glyph.GetOrigin({rect.left, rect.top});
if (!point.has_value())
continue;
pBitmap->CompositeMask(
point->x, point->y, glyph.m_pGlyph->GetBitmap()->GetWidth(),
glyph.m_pGlyph->GetBitmap()->GetHeight(), glyph.m_pGlyph->GetBitmap(),
fill_argb, 0, 0, BlendMode::kNormal, nullptr, false);
}
m_pDevice->SetBitMask(pBitmap, rect.left, rect.top, fill_argb);
return true;
}
void CPDF_RenderStatus::DrawTextPathWithPattern(const CPDF_TextObject* textobj,
const CFX_Matrix& mtObj2Device,
CPDF_Font* pFont,
float font_size,
const CFX_Matrix* pTextMatrix,
bool bFill,
bool bStroke) {
if (!bStroke) {
std::vector<std::unique_ptr<CPDF_TextObject>> pCopy;
pCopy.push_back(std::unique_ptr<CPDF_TextObject>(textobj->Clone()));
CPDF_PathObject path;
path.set_filltype(FXFILL_WINDING);
path.m_ClipPath.AppendTexts(&pCopy);
path.m_ColorState = textobj->m_ColorState;
path.m_GeneralState = textobj->m_GeneralState;
path.path().AppendRect(textobj->GetRect().left, textobj->GetRect().bottom,
textobj->GetRect().right, textobj->GetRect().top);
path.SetRect(textobj->GetRect());
AutoRestorer<UnownedPtr<const CPDF_PageObject>> restorer2(&m_pCurObj);
RenderSingleObject(&path, mtObj2Device);
return;
}
CPDF_CharPosList CharPosList(textobj->GetCharCodes(),
textobj->GetCharPositions(), pFont, font_size);
for (uint32_t i = 0; i < CharPosList.GetCount(); ++i) {
const TextCharPos& charpos = CharPosList.GetAt(i);
auto* font = charpos.m_FallbackFontPosition == -1
? pFont->GetFont()
: pFont->GetFontFallback(charpos.m_FallbackFontPosition);
const CFX_PathData* pPath =
font->LoadGlyphPath(charpos.m_GlyphIndex, charpos.m_FontCharWidth);
if (!pPath)
continue;
CPDF_PathObject path;
path.m_GraphState = textobj->m_GraphState;
path.m_ColorState = textobj->m_ColorState;
CFX_Matrix matrix;
if (charpos.m_bGlyphAdjust) {
matrix = CFX_Matrix(charpos.m_AdjustMatrix[0], charpos.m_AdjustMatrix[1],
charpos.m_AdjustMatrix[2], charpos.m_AdjustMatrix[3],
0, 0);
}
matrix.Concat(CFX_Matrix(font_size, 0, 0, font_size, charpos.m_Origin.x,
charpos.m_Origin.y));
path.set_stroke(bStroke);
path.set_filltype(bFill ? FXFILL_WINDING : 0);
path.path().Append(pPath, &matrix);
path.set_matrix(*pTextMatrix);
path.CalcBoundingBox();
ProcessPath(&path, mtObj2Device);
}
}
void CPDF_RenderStatus::DrawShading(const CPDF_ShadingPattern* pPattern,
const CFX_Matrix& mtMatrix,
const FX_RECT& clip_rect,
int alpha,
bool bAlphaMode) {
const auto& funcs = pPattern->GetFuncs();
const CPDF_Dictionary* pDict = pPattern->GetShadingObject()->GetDict();
RetainPtr<CPDF_ColorSpace> pColorSpace = pPattern->GetCS();
if (!pColorSpace)
return;
FX_ARGB background = 0;
if (!pPattern->IsShadingObject() && pDict->KeyExist("Background")) {
const CPDF_Array* pBackColor = pDict->GetArrayFor("Background");
if (pBackColor && pBackColor->size() >= pColorSpace->CountComponents()) {
std::vector<float> comps =
ReadArrayElementsToVector(pBackColor, pColorSpace->CountComponents());
float R = 0.0f;
float G = 0.0f;
float B = 0.0f;
pColorSpace->GetRGB(comps.data(), &R, &G, &B);
background = ArgbEncode(255, (int32_t)(R * 255), (int32_t)(G * 255),
(int32_t)(B * 255));
}
}
FX_RECT clip_rect_bbox = clip_rect;
if (pDict->KeyExist("BBox")) {
clip_rect_bbox.Intersect(
mtMatrix.TransformRect(pDict->GetRectFor("BBox")).GetOuterRect());
}
if (m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_SHADING &&
m_pDevice->GetDeviceDriver()->DrawShading(
pPattern, &mtMatrix, clip_rect_bbox, alpha, bAlphaMode)) {
return;
}
CPDF_DeviceBuffer buffer(m_pContext.Get(), m_pDevice, clip_rect_bbox,
m_pCurObj.Get(), 150);
if (!buffer.Initialize())
return;
CFX_Matrix FinalMatrix = mtMatrix * buffer.GetMatrix();
RetainPtr<CFX_DIBitmap> pBitmap = buffer.GetBitmap();
if (!pBitmap->GetBuffer())
return;
pBitmap->Clear(background);
switch (pPattern->GetShadingType()) {
case kInvalidShading:
case kMaxShading:
return;
case kFunctionBasedShading:
DrawFuncShading(pBitmap, FinalMatrix, pDict, funcs, pColorSpace, alpha);
break;
case kAxialShading:
DrawAxialShading(pBitmap, FinalMatrix, pDict, funcs, pColorSpace, alpha);
break;
case kRadialShading:
DrawRadialShading(pBitmap, FinalMatrix, pDict, funcs, pColorSpace, alpha);
break;
case kFreeFormGouraudTriangleMeshShading: {
// The shading object can be a stream or a dictionary. We do not handle
// the case of dictionary at the moment.
if (const CPDF_Stream* pStream = ToStream(pPattern->GetShadingObject())) {
DrawFreeGouraudShading(pBitmap, FinalMatrix, pStream, funcs,
pColorSpace, alpha);
}
} break;
case kLatticeFormGouraudTriangleMeshShading: {
// The shading object can be a stream or a dictionary. We do not handle
// the case of dictionary at the moment.
if (const CPDF_Stream* pStream = ToStream(pPattern->GetShadingObject())) {
DrawLatticeGouraudShading(pBitmap, FinalMatrix, pStream, funcs,
pColorSpace, alpha);
}
} break;
case kCoonsPatchMeshShading:
case kTensorProductPatchMeshShading: {
// The shading object can be a stream or a dictionary. We do not handle
// the case of dictionary at the moment.
if (const CPDF_Stream* pStream = ToStream(pPattern->GetShadingObject())) {
DrawCoonPatchMeshes(pPattern->GetShadingType(), pBitmap, FinalMatrix,
pStream, funcs, pColorSpace,
m_Options.GetOptions().bNoPathSmooth, alpha);
}
} break;
}
if (bAlphaMode)
pBitmap->LoadChannelFromAlpha(FXDIB_Red, pBitmap);
if (m_Options.ColorModeIs(CPDF_RenderOptions::kGray))
pBitmap->ConvertColorScale(0, 0xffffff);
buffer.OutputToDevice();
}
void CPDF_RenderStatus::DrawShadingPattern(CPDF_ShadingPattern* pattern,
const CPDF_PageObject* pPageObj,
const CFX_Matrix& mtObj2Device,
bool bStroke) {
if (!pattern->Load())
return;
CFX_RenderDevice::StateRestorer restorer(m_pDevice);
if (!ClipPattern(pPageObj, mtObj2Device, bStroke))
return;
FX_RECT rect = GetObjectClippedRect(pPageObj, mtObj2Device);
if (rect.IsEmpty())
return;
CFX_Matrix matrix = pattern->pattern_to_form() * mtObj2Device;
int alpha =
FXSYS_round(255 * (bStroke ? pPageObj->m_GeneralState.GetStrokeAlpha()
: pPageObj->m_GeneralState.GetFillAlpha()));
DrawShading(pattern, matrix, rect, alpha,
m_Options.ColorModeIs(CPDF_RenderOptions::kAlpha));
}
void CPDF_RenderStatus::ProcessShading(const CPDF_ShadingObject* pShadingObj,
const CFX_Matrix& mtObj2Device) {
FX_RECT rect = pShadingObj->GetTransformedBBox(mtObj2Device);
FX_RECT clip_box = m_pDevice->GetClipBox();
rect.Intersect(clip_box);
if (rect.IsEmpty())
return;
CFX_Matrix matrix = pShadingObj->matrix() * mtObj2Device;
DrawShading(pShadingObj->pattern(), matrix, rect,
FXSYS_round(255 * pShadingObj->m_GeneralState.GetFillAlpha()),
m_Options.ColorModeIs(CPDF_RenderOptions::kAlpha));
}
void CPDF_RenderStatus::DrawTilingPattern(CPDF_TilingPattern* pPattern,
CPDF_PageObject* pPageObj,
const CFX_Matrix& mtObj2Device,
bool bStroke) {
const std::unique_ptr<CPDF_Form> pPatternForm = pPattern->Load(pPageObj);
if (!pPatternForm)
return;
CFX_RenderDevice::StateRestorer restorer(m_pDevice);
if (!ClipPattern(pPageObj, mtObj2Device, bStroke))
return;
FX_RECT clip_box = m_pDevice->GetClipBox();
if (clip_box.IsEmpty())
return;
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;
}
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;
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 = CloneObjStates(pPageObj, bStroke);
const CPDF_Dictionary* pFormDict = pPatternForm->GetDict();
const CPDF_Dictionary* pFormResource =
pFormDict ? pFormDict->GetDictFor("Resources") : nullptr;
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(m_pDevice);
CPDF_RenderStatus status(m_pContext.Get(), m_pDevice);
status.SetOptions(m_Options);
status.SetTransparency(pPatternForm->GetTransparency());
status.SetFormResource(pFormResource);
status.SetDropObjects(m_bDropObjects);
status.Initialize(this, pStates.get());
status.RenderObjectList(pPatternForm.get(), matrix);
}
}
return;
}
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_round(mtPattern2Device.e);
int orig_y = FXSYS_round(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(
m_pContext->GetDocument(), m_pContext->GetPageCache(), pPattern,
pPatternForm.get(), mtObj2Device, 8, 8, m_Options.GetOptions());
pPatternBitmap = pEnlargedBitmap->StretchTo(
width, height, FXDIB_ResampleOptions(), nullptr);
} else {
pPatternBitmap =
DrawPatternBitmap(m_pContext->GetDocument(), m_pContext->GetPageCache(),
pPattern, pPatternForm.get(), mtObj2Device, width,
height, m_Options.GetOptions());
}
if (!pPatternBitmap)
return;
if (m_Options.ColorModeIs(CPDF_RenderOptions::kGray))
pPatternBitmap->ConvertColorScale(0, 0xffffff);
FX_ARGB fill_argb = 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_Argb))
return;
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_round(mtPattern2Device.e) + col * width - clip_box.left;
start_y = FXSYS_round(mtPattern2Device.f) + row * height - clip_box.top;
} else {
CFX_PointF original = mtPattern2Device.Transform(
CFX_PointF(col * pPattern->x_step(), row * pPattern->y_step()));
pdfium::base::CheckedNumeric<int> safeStartX =
FXSYS_round(original.x + left_offset);
pdfium::base::CheckedNumeric<int> safeStartY =
FXSYS_round(original.y + top_offset);
safeStartX -= clip_box.left;
safeStartY -= clip_box.top;
if (!safeStartX.IsValid() || !safeStartY.IsValid())
return;
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->GetBuffer() + pScreen->GetPitch() * start_y + start_x * 4);
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);
}
}
}
}
CompositeDIBitmap(pScreen, clip_box.left, clip_box.top, 0, 255,
BlendMode::kNormal, CPDF_Transparency());
}
void CPDF_RenderStatus::DrawPathWithPattern(CPDF_PathObject* pPathObj,
const CFX_Matrix& mtObj2Device,
const CPDF_Color* pColor,
bool bStroke) {
CPDF_Pattern* pattern = pColor->GetPattern();
if (!pattern)
return;
if (CPDF_TilingPattern* pTilingPattern = pattern->AsTilingPattern())
DrawTilingPattern(pTilingPattern, pPathObj, mtObj2Device, bStroke);
else if (CPDF_ShadingPattern* pShadingPattern = pattern->AsShadingPattern())
DrawShadingPattern(pShadingPattern, pPathObj, mtObj2Device, bStroke);
}
void CPDF_RenderStatus::ProcessPathPattern(CPDF_PathObject* pPathObj,
const CFX_Matrix& mtObj2Device,
int* filltype,
bool* bStroke) {
ASSERT(filltype);
ASSERT(bStroke);
if (*filltype) {
const CPDF_Color& FillColor = *pPathObj->m_ColorState.GetFillColor();
if (FillColor.IsPattern()) {
DrawPathWithPattern(pPathObj, mtObj2Device, &FillColor, false);
*filltype = 0;
}
}
if (*bStroke) {
const CPDF_Color& StrokeColor = *pPathObj->m_ColorState.GetStrokeColor();
if (StrokeColor.IsPattern()) {
DrawPathWithPattern(pPathObj, mtObj2Device, &StrokeColor, true);
*bStroke = false;
}
}
}
bool CPDF_RenderStatus::ProcessImage(CPDF_ImageObject* pImageObj,
const CFX_Matrix& mtObj2Device) {
CPDF_ImageRenderer render;
if (render.Start(this, pImageObj, mtObj2Device, m_bStdCS, m_curBlend))
render.Continue(nullptr);
return render.GetResult();
}
void CPDF_RenderStatus::CompositeDIBitmap(
const RetainPtr<CFX_DIBitmap>& pDIBitmap,
int left,
int top,
FX_ARGB mask_argb,
int bitmap_alpha,
BlendMode blend_mode,
const CPDF_Transparency& transparency) {
if (!pDIBitmap)
return;
if (blend_mode == BlendMode::kNormal) {
if (!pDIBitmap->IsAlphaMask()) {
if (bitmap_alpha < 255) {
#ifdef _SKIA_SUPPORT_
std::unique_ptr<CFX_ImageRenderer> dummy;
CFX_Matrix m = CFX_RenderDevice::GetFlipMatrix(
pDIBitmap->GetWidth(), pDIBitmap->GetHeight(), left, top);
m_pDevice->StartDIBits(pDIBitmap, bitmap_alpha, 0, m,
FXDIB_ResampleOptions(), &dummy);
return;
#else
pDIBitmap->MultiplyAlpha(bitmap_alpha);
#endif
}
#ifdef _SKIA_SUPPORT_
CFX_SkiaDeviceDriver::PreMultiply(pDIBitmap);
#endif
if (m_pDevice->SetDIBits(pDIBitmap, left, top)) {
return;
}
} else {
uint32_t fill_argb = m_Options.TranslateColor(mask_argb);
if (bitmap_alpha < 255) {
uint8_t* fill_argb8 = reinterpret_cast<uint8_t*>(&fill_argb);
fill_argb8[3] *= bitmap_alpha / 255;
}
if (m_pDevice->SetBitMask(pDIBitmap, left, top, fill_argb)) {
return;
}
}
}
bool bIsolated = transparency.IsIsolated();
bool bBackAlphaRequired =
blend_mode != BlendMode::kNormal && bIsolated && !m_bDropObjects;
bool bGetBackGround =
((m_pDevice->GetRenderCaps() & FXRC_ALPHA_OUTPUT)) ||
(!(m_pDevice->GetRenderCaps() & FXRC_ALPHA_OUTPUT) &&
(m_pDevice->GetRenderCaps() & FXRC_GET_BITS) && !bBackAlphaRequired);
if (bGetBackGround) {
if (bIsolated || !transparency.IsGroup()) {
if (!pDIBitmap->IsAlphaMask())
m_pDevice->SetDIBitsWithBlend(pDIBitmap, left, top, blend_mode);
return;
}
FX_RECT rect(left, top, left + pDIBitmap->GetWidth(),
top + pDIBitmap->GetHeight());
rect.Intersect(m_pDevice->GetClipBox());
RetainPtr<CFX_DIBitmap> pClone;
if (m_pDevice->GetBackDrop() && m_pDevice->GetBitmap()) {
pClone = m_pDevice->GetBackDrop()->Clone(&rect);
if (!pClone)
return;
RetainPtr<CFX_DIBitmap> pForeBitmap = m_pDevice->GetBitmap();
pClone->CompositeBitmap(0, 0, pClone->GetWidth(), pClone->GetHeight(),
pForeBitmap, rect.left, rect.top,
BlendMode::kNormal, nullptr, false);
left = std::min(left, 0);
top = std::min(top, 0);
if (pDIBitmap->IsAlphaMask()) {
pClone->CompositeMask(0, 0, pClone->GetWidth(), pClone->GetHeight(),
pDIBitmap, mask_argb, left, top, blend_mode,
nullptr, false);
} else {
pClone->CompositeBitmap(0, 0, pClone->GetWidth(), pClone->GetHeight(),
pDIBitmap, left, top, blend_mode, nullptr,
false);
}
} else {
pClone = pDIBitmap;
}
if (m_pDevice->GetBackDrop()) {
m_pDevice->SetDIBits(pClone, rect.left, rect.top);
} else {
if (!pDIBitmap->IsAlphaMask()) {
m_pDevice->SetDIBitsWithBlend(pDIBitmap, rect.left, rect.top,
blend_mode);
}
}
return;
}
int back_left;
int back_top;
FX_RECT rect(left, top, left + pDIBitmap->GetWidth(),
top + pDIBitmap->GetHeight());
RetainPtr<CFX_DIBitmap> pBackdrop = GetBackdrop(
m_pCurObj.Get(), rect, blend_mode != BlendMode::kNormal && bIsolated,
&back_left, &back_top);
if (!pBackdrop)
return;
if (pDIBitmap->IsAlphaMask()) {
pBackdrop->CompositeMask(left - back_left, top - back_top,
pDIBitmap->GetWidth(), pDIBitmap->GetHeight(),
pDIBitmap, mask_argb, 0, 0, blend_mode, nullptr,
false);
} else {
pBackdrop->CompositeBitmap(left - back_left, top - back_top,
pDIBitmap->GetWidth(), pDIBitmap->GetHeight(),
pDIBitmap, 0, 0, blend_mode, nullptr, false);
}
auto pBackdrop1 = pdfium::MakeRetain<CFX_DIBitmap>();
pBackdrop1->Create(pBackdrop->GetWidth(), pBackdrop->GetHeight(),
FXDIB_Rgb32);
pBackdrop1->Clear((uint32_t)-1);
pBackdrop1->CompositeBitmap(0, 0, pBackdrop->GetWidth(),
pBackdrop->GetHeight(), pBackdrop, 0, 0,
BlendMode::kNormal, nullptr, false);
pBackdrop = std::move(pBackdrop1);
m_pDevice->SetDIBits(pBackdrop, back_left, back_top);
}
RetainPtr<CFX_DIBitmap> CPDF_RenderStatus::LoadSMask(
CPDF_Dictionary* pSMaskDict,
FX_RECT* pClipRect,
const CFX_Matrix* pMatrix) {
if (!pSMaskDict)
return nullptr;
CPDF_Stream* pGroup = pSMaskDict->GetStreamFor(pdfium::transparency::kG);
if (!pGroup)
return nullptr;
std::unique_ptr<CPDF_Function> pFunc;
const CPDF_Object* pFuncObj =
pSMaskDict->GetDirectObjectFor(pdfium::transparency::kTR);
if (pFuncObj && (pFuncObj->IsDictionary() || pFuncObj->IsStream()))
pFunc = CPDF_Function::Load(pFuncObj);
CFX_Matrix matrix = *pMatrix;
matrix.Translate(-pClipRect->left, -pClipRect->top);
CPDF_Form form(m_pContext->GetDocument(), m_pContext->GetPageResources(),
pGroup);
form.ParseContent(nullptr, nullptr, nullptr, nullptr);
CFX_DefaultRenderDevice bitmap_device;
bool bLuminosity =
pSMaskDict->GetStringFor(pdfium::transparency::kSoftMaskSubType) !=
pdfium::transparency::kAlpha;
int width = pClipRect->right - pClipRect->left;
int height = pClipRect->bottom - pClipRect->top;
FXDIB_Format format;
#if defined(OS_MACOSX) || defined _SKIA_SUPPORT_ || defined _SKIA_SUPPORT_PATHS_
format = bLuminosity ? FXDIB_Rgb32 : FXDIB_8bppMask;
#else
format = bLuminosity ? FXDIB_Rgb : FXDIB_8bppMask;
#endif
if (!bitmap_device.Create(width, height, format, nullptr))
return nullptr;
RetainPtr<CFX_DIBitmap> bitmap = bitmap_device.GetBitmap();
int nCSFamily = 0;
if (bLuminosity) {
FX_ARGB back_color =
GetBackColor(pSMaskDict, pGroup->GetDict(), &nCSFamily);
bitmap->Clear(back_color);
} else {
bitmap->Clear(0);
}
const CPDF_Dictionary* pFormResource = nullptr;
if (form.GetDict())
pFormResource = form.GetDict()->GetDictFor("Resources");
CPDF_RenderOptions options;
options.SetColorMode(bLuminosity ? CPDF_RenderOptions::kNormal
: CPDF_RenderOptions::kAlpha);
CPDF_RenderStatus status(m_pContext.Get(), &bitmap_device);
status.SetOptions(options);
status.SetGroupFamily(nCSFamily);
status.SetLoadMask(bLuminosity);
status.SetStdCS(true);
status.SetFormResource(pFormResource);
status.SetDropObjects(m_bDropObjects);
status.Initialize(nullptr, nullptr);
status.RenderObjectList(&form, matrix);
auto pMask = pdfium::MakeRetain<CFX_DIBitmap>();
if (!pMask->Create(width, height, FXDIB_8bppMask))
return nullptr;
uint8_t* dest_buf = pMask->GetBuffer();
int dest_pitch = pMask->GetPitch();
uint8_t* src_buf = bitmap->GetBuffer();
int src_pitch = bitmap->GetPitch();
std::vector<uint8_t> transfers(256);
if (pFunc) {
std::vector<float> results(pFunc->CountOutputs());
for (int i = 0; i < 256; i++) {
float input = (float)i / 255.0f;
int nresult;
pFunc->Call(&input, 1, results.data(), &nresult);
transfers[i] = FXSYS_round(results[0] * 255);
}
} else {
for (int i = 0; i < 256; i++) {
transfers[i] = i;
}
}
if (bLuminosity) {
int Bpp = bitmap->GetBPP() / 8;
for (int row = 0; row < height; row++) {
uint8_t* dest_pos = dest_buf + row * dest_pitch;
uint8_t* src_pos = src_buf + row * src_pitch;
for (int col = 0; col < width; col++) {
*dest_pos++ = transfers[FXRGB2GRAY(src_pos[2], src_pos[1], *src_pos)];
src_pos += Bpp;
}
}
} else if (pFunc) {
int size = dest_pitch * height;
for (int i = 0; i < size; i++) {
dest_buf[i] = transfers[src_buf[i]];
}
} else {
memcpy(dest_buf, src_buf, dest_pitch * height);
}
return pMask;
}
FX_ARGB CPDF_RenderStatus::GetBackColor(const CPDF_Dictionary* pSMaskDict,
const CPDF_Dictionary* pGroupDict,
int* pCSFamily) {
static constexpr FX_ARGB kDefaultColor = ArgbEncode(255, 0, 0, 0);
const CPDF_Array* pBC = pSMaskDict->GetArrayFor(pdfium::transparency::kBC);
if (!pBC)
return kDefaultColor;
const CPDF_Object* pCSObj = nullptr;
const CPDF_Dictionary* pGroup =
pGroupDict ? pGroupDict->GetDictFor("Group") : nullptr;
if (pGroup)
pCSObj = pGroup->GetDirectObjectFor(pdfium::transparency::kCS);
RetainPtr<CPDF_ColorSpace> pCS =
CPDF_DocPageData::FromDocument(m_pContext->GetDocument())
->GetColorSpace(pCSObj, nullptr);
if (!pCS)
return kDefaultColor;
int family = pCS->GetFamily();
if (family == PDFCS_LAB || pCS->IsSpecial() ||
(family == PDFCS_ICCBASED && !pCS->IsNormal())) {
return kDefaultColor;
}
// Store Color Space Family to use in CPDF_RenderStatus::Initialize().
*pCSFamily = family;
uint32_t comps = std::max(8u, pCS->CountComponents());
size_t count = std::min<size_t>(8, pBC->size());
std::vector<float> floats = ReadArrayElementsToVector(pBC, count);
floats.resize(comps);
float R;
float G;
float B;
pCS->GetRGB(floats.data(), &R, &G, &B);
return ArgbEncode(255, static_cast<int>(R * 255), static_cast<int>(G * 255),
static_cast<int>(B * 255));
}