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// 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 <memory>
#include <utility>
#include <vector>
#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_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_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/page/pageint.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/render/cpdf_charposlist.h"
#include "core/fpdfapi/render/cpdf_devicebuffer.h"
#include "core/fpdfapi/render/cpdf_dibsource.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/fpdfdoc/cpdf_occontext.h"
#include "core/fxcodec/fx_codec.h"
#include "core/fxcrt/cfx_maybe_owned.h"
#include "core/fxcrt/fx_safe_types.h"
#include "core/fxge/cfx_fxgedevice.h"
#include "core/fxge/cfx_graphstatedata.h"
#include "core/fxge/cfx_pathdata.h"
#include "core/fxge/cfx_renderdevice.h"
#include "core/fxge/ifx_renderdevicedriver.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
#define SHADING_STEPS 256
namespace {
void ReleaseCachedType3(CPDF_Type3Font* pFont) {
CPDF_Document* pDoc = pFont->m_pDocument;
if (!pDoc)
return;
pDoc->GetRenderData()->MaybePurgeCachedType3(pFont);
pDoc->GetPageData()->ReleaseFont(pFont->GetFontDict());
}
class CPDF_RefType3Cache {
public:
explicit CPDF_RefType3Cache(CPDF_Type3Font* pType3Font)
: m_dwCount(0), m_pType3Font(pType3Font) {}
~CPDF_RefType3Cache() {
while (m_dwCount--)
ReleaseCachedType3(m_pType3Font);
}
uint32_t m_dwCount;
CPDF_Type3Font* const m_pType3Font;
};
uint32_t CountOutputs(
const std::vector<std::unique_ptr<CPDF_Function>>& funcs) {
uint32_t total = 0;
for (const auto& func : funcs) {
if (func)
total += func->CountOutputs();
}
return total;
}
void DrawAxialShading(const CFX_RetainPtr<CFX_DIBitmap>& pBitmap,
CFX_Matrix* pObject2Bitmap,
CPDF_Dictionary* pDict,
const std::vector<std::unique_ptr<CPDF_Function>>& funcs,
CPDF_ColorSpace* pCS,
int alpha) {
ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
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;
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);
CFX_Matrix matrix;
matrix.SetReverse(*pObject2Bitmap);
uint32_t total_results =
std::max(CountOutputs(funcs), pCS->CountComponents());
CFX_FixedBufGrow<float, 16> result_array(total_results);
float* pResults = result_array;
memset(pResults, 0, total_results * sizeof(float));
uint32_t rgb_array[SHADING_STEPS];
for (int i = 0; i < SHADING_STEPS; i++) {
float input = (t_max - t_min) * i / SHADING_STEPS + t_min;
int offset = 0;
for (const auto& func : funcs) {
if (func) {
int nresults = 0;
if (func->Call(&input, 1, pResults + offset, &nresults))
offset += nresults;
}
}
float R = 0.0f;
float G = 0.0f;
float B = 0.0f;
pCS->GetRGB(pResults, &R, &G, &B);
rgb_array[i] =
FXARGB_TODIB(FXARGB_MAKE(alpha, FXSYS_round(R * 255),
FXSYS_round(G * 255), FXSYS_round(B * 255)));
}
int pitch = pBitmap->GetPitch();
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)));
float scale =
(((pos.x - start_x) * x_span) + ((pos.y - start_y) * y_span)) /
axis_len_square;
int index = (int32_t)(scale * (SHADING_STEPS - 1));
if (index < 0) {
if (!bStartExtend)
continue;
index = 0;
} else if (index >= SHADING_STEPS) {
if (!bEndExtend)
continue;
index = SHADING_STEPS - 1;
}
dib_buf[column] = rgb_array[index];
}
}
}
void DrawRadialShading(const CFX_RetainPtr<CFX_DIBitmap>& pBitmap,
CFX_Matrix* pObject2Bitmap,
CPDF_Dictionary* pDict,
const std::vector<std::unique_ptr<CPDF_Function>>& funcs,
CPDF_ColorSpace* pCS,
int alpha) {
ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
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);
CFX_Matrix matrix;
matrix.SetReverse(*pObject2Bitmap);
float t_min = 0;
float t_max = 1.0f;
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);
}
uint32_t total_results =
std::max(CountOutputs(funcs), pCS->CountComponents());
CFX_FixedBufGrow<float, 16> result_array(total_results);
float* pResults = result_array;
memset(pResults, 0, total_results * sizeof(float));
uint32_t rgb_array[SHADING_STEPS];
for (int i = 0; i < SHADING_STEPS; i++) {
float input = (t_max - t_min) * i / SHADING_STEPS + t_min;
int offset = 0;
for (const auto& func : funcs) {
if (func) {
int nresults;
if (func->Call(&input, 1, pResults + offset, &nresults))
offset += nresults;
}
}
float R = 0.0f;
float G = 0.0f;
float B = 0.0f;
pCS->GetRGB(pResults, &R, &G, &B);
rgb_array[i] =
FXARGB_TODIB(FXARGB_MAKE(alpha, FXSYS_round(R * 255),
FXSYS_round(G * 255), FXSYS_round(B * 255)));
}
float a = ((start_x - end_x) * (start_x - end_x)) +
((start_y - end_y) * (start_y - end_y)) -
((start_r - end_r) * (start_r - end_r));
int width = pBitmap->GetWidth();
int height = pBitmap->GetHeight();
int pitch = pBitmap->GetPitch();
bool bDecreasing = false;
if (start_r > end_r) {
int length = (int)sqrt((((start_x - end_x) * (start_x - end_x)) +
((start_y - end_y) * (start_y - end_y))));
if (length < start_r - end_r) {
bDecreasing = true;
}
}
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)));
float b = -2 * (((pos.x - start_x) * (end_x - start_x)) +
((pos.y - start_y) * (end_y - start_y)) +
(start_r * (end_r - start_r)));
float c = ((pos.x - start_x) * (pos.x - start_x)) +
((pos.y - start_y) * (pos.y - start_y)) - (start_r * start_r);
float s;
if (a == 0) {
s = -c / b;
} else {
float b2_4ac = (b * b) - 4 * (a * c);
if (b2_4ac < 0) {
continue;
}
float root = sqrt(b2_4ac);
float s1, s2;
if (a > 0) {
s1 = (-b - root) / (2 * a);
s2 = (-b + root) / (2 * a);
} else {
s2 = (-b - root) / (2 * a);
s1 = (-b + root) / (2 * a);
}
if (bDecreasing) {
if (s1 >= 0 || bStartExtend) {
s = s1;
} else {
s = s2;
}
} else {
if (s2 <= 1.0f || bEndExtend) {
s = s2;
} else {
s = s1;
}
}
if ((start_r + s * (end_r - start_r)) < 0) {
continue;
}
}
int index = (int32_t)(s * (SHADING_STEPS - 1));
if (index < 0) {
if (!bStartExtend) {
continue;
}
index = 0;
}
if (index >= SHADING_STEPS) {
if (!bEndExtend) {
continue;
}
index = SHADING_STEPS - 1;
}
dib_buf[column] = rgb_array[index];
}
}
}
void DrawFuncShading(const CFX_RetainPtr<CFX_DIBitmap>& pBitmap,
CFX_Matrix* pObject2Bitmap,
CPDF_Dictionary* pDict,
const std::vector<std::unique_ptr<CPDF_Function>>& funcs,
CPDF_ColorSpace* pCS,
int alpha) {
ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
CPDF_Array* pDomain = pDict->GetArrayFor("Domain");
float xmin = 0, ymin = 0, xmax = 1.0f, 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;
matrix.SetReverse(*pObject2Bitmap);
CFX_Matrix reverse_matrix;
reverse_matrix.SetReverse(mtDomain2Target);
matrix.Concat(reverse_matrix);
int width = pBitmap->GetWidth();
int height = pBitmap->GetHeight();
int pitch = pBitmap->GetPitch();
uint32_t total_results =
std::max(CountOutputs(funcs), pCS->CountComponents());
CFX_FixedBufGrow<float, 16> result_array(total_results);
float* pResults = result_array;
memset(pResults, 0, total_results * sizeof(float));
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, pResults + offset, &nresults))
offset += nresults;
}
}
float R = 0.0f;
float G = 0.0f;
float B = 0.0f;
pCS->GetRGB(pResults, &R, &G, &B);
dib_buf[column] = FXARGB_TODIB(FXARGB_MAKE(
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 CFX_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,
FXARGB_MAKE(alpha, (int32_t)(R * 255), (int32_t)(G * 255),
(int32_t)(B * 255)));
dib_buf += 4;
}
}
}
void DrawFreeGouraudShading(
const CFX_RetainPtr<CFX_DIBitmap>& pBitmap,
CFX_Matrix* pObject2Bitmap,
CPDF_Stream* pShadingStream,
const std::vector<std::unique_ptr<CPDF_Function>>& funcs,
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(*pObject2Bitmap, &vertex, &flag))
return;
if (flag == 0) {
triangle[0] = vertex;
for (int j = 1; j < 3; j++) {
uint32_t tflag;
if (!stream.ReadVertex(*pObject2Bitmap, &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 CFX_RetainPtr<CFX_DIBitmap>& pBitmap,
CFX_Matrix* pObject2Bitmap,
CPDF_Stream* pShadingStream,
const std::vector<std::unique_ptr<CPDF_Function>>& funcs,
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::unique_ptr<CPDF_MeshVertex, FxFreeDeleter> vertex(
FX_Alloc2D(CPDF_MeshVertex, row_verts, 2));
if (!stream.ReadVertexRow(*pObject2Bitmap, row_verts, vertex.get()))
return;
int last_index = 0;
while (1) {
CPDF_MeshVertex* last_row = vertex.get() + last_index * row_verts;
CPDF_MeshVertex* this_row = vertex.get() + (1 - last_index) * row_verts;
if (!stream.ReadVertexRow(*pObject2Bitmap, row_verts, this_row))
return;
CPDF_MeshVertex triangle[3];
for (int i = 1; i < row_verts; i++) {
triangle[0] = last_row[i];
triangle[1] = this_row[i - 1];
triangle[2] = last_row[i - 1];
DrawGouraud(pBitmap, alpha, triangle);
triangle[2] = this_row[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 BiInterpolImpl(int c0,
int c1,
int c2,
int c3,
int x,
int y,
int x_scale,
int y_scale) {
int x1 = c0 + (c3 - c0) * x / x_scale;
int x2 = c1 + (c2 - c1) * x / x_scale;
return x1 + (x2 - x1) * y / y_scale;
}
struct Coon_Color {
Coon_Color() { memset(comp, 0, sizeof(int) * 3); }
int comp[3];
void BiInterpol(Coon_Color colors[4],
int x,
int y,
int x_scale,
int y_scale) {
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);
}
}
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])});
}
};
#define COONCOLOR_THRESHOLD 4
struct CPDF_PatchDrawer {
Coon_Color patch_colors[4];
int max_delta;
CFX_PathData path;
CFX_RenderDevice* pDevice;
int fill_mode;
int alpha;
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;
div_colors[0].BiInterpol(patch_colors, left, bottom, x_scale, y_scale);
if (!bSmall) {
div_colors[1].BiInterpol(patch_colors, left, bottom + 1, x_scale,
y_scale);
div_colors[2].BiInterpol(patch_colors, left + 1, bottom + 1, x_scale,
y_scale);
div_colors[3].BiInterpol(patch_colors, left + 1, bottom, x_scale,
y_scale);
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 (fill_mode & RENDER_NOPATHSMOOTH) {
fillFlags |= FXFILL_NOPATHSMOOTH;
}
pDevice->DrawPath(
&path, nullptr, nullptr,
FXARGB_MAKE(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());
}
}
}
};
void DrawCoonPatchMeshes(
ShadingType type,
const CFX_RetainPtr<CFX_DIBitmap>& pBitmap,
CFX_Matrix* pObject2Bitmap,
CPDF_Stream* pShadingStream,
const std::vector<std::unique_ptr<CPDF_Function>>& funcs,
CPDF_ColorSpace* pCS,
int fill_mode,
int alpha) {
ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
ASSERT(type == kCoonsPatchMeshShading ||
type == kTensorProductPatchMeshShading);
CFX_FxgeDevice 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.fill_mode = fill_mode;
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] = pObject2Bitmap->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);
}
}
CFX_RetainPtr<CFX_DIBitmap> DrawPatternBitmap(CPDF_Document* pDoc,
CPDF_PageRenderCache* pCache,
CPDF_TilingPattern* pPattern,
const CFX_Matrix* pObject2Device,
int width,
int height,
int flags) {
auto pBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
if (!pBitmap->Create(width, height,
pPattern->colored() ? FXDIB_Argb : FXDIB_8bppMask)) {
return nullptr;
}
CFX_FxgeDevice bitmap_device;
bitmap_device.Attach(pBitmap, false, nullptr, false);
pBitmap->Clear(0);
CFX_FloatRect cell_bbox = pPattern->bbox();
pPattern->pattern_to_form()->TransformRect(cell_bbox);
pObject2Device->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 = *pObject2Device;
mtPattern2Bitmap.Concat(mtAdjust);
CPDF_RenderOptions options;
if (!pPattern->colored())
options.m_ColorMode = RENDER_COLOR_ALPHA;
flags |= RENDER_FORCE_HALFTONE;
options.m_Flags = flags;
CPDF_RenderContext context(pDoc, pCache);
context.AppendLayer(pPattern->form(), &mtPattern2Bitmap);
context.Render(&bitmap_device, &options, nullptr);
#if defined _SKIA_SUPPORT_PATHS_
bitmap_device.Flush();
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;
}
} // namespace
// static
int CPDF_RenderStatus::s_CurrentRecursionDepth = 0;
CPDF_RenderStatus::CPDF_RenderStatus()
: m_pFormResource(nullptr),
m_pPageResource(nullptr),
m_pContext(nullptr),
m_bStopped(false),
m_pDevice(nullptr),
m_pCurObj(nullptr),
m_pStopObj(nullptr),
m_bPrint(false),
m_Transparency(0),
m_bDropObjects(false),
m_bStdCS(false),
m_GroupFamily(0),
m_bLoadMask(false),
m_pType3Char(nullptr),
m_T3FillColor(0),
m_curBlend(FXDIB_BLEND_NORMAL) {}
CPDF_RenderStatus::~CPDF_RenderStatus() {}
bool CPDF_RenderStatus::Initialize(CPDF_RenderContext* pContext,
CFX_RenderDevice* pDevice,
const CFX_Matrix* pDeviceMatrix,
const CPDF_PageObject* pStopObj,
const CPDF_RenderStatus* pParentState,
const CPDF_GraphicStates* pInitialStates,
const CPDF_RenderOptions* pOptions,
int transparency,
bool bDropObjects,
CPDF_Dictionary* pFormResource,
bool bStdCS,
CPDF_Type3Char* pType3Char,
FX_ARGB fill_color,
uint32_t GroupFamily,
bool bLoadMask) {
m_pContext = pContext;
m_pDevice = pDevice;
m_bPrint = m_pDevice->GetDeviceClass() != FXDC_DISPLAY;
if (pDeviceMatrix) {
m_DeviceMatrix = *pDeviceMatrix;
}
m_pStopObj = pStopObj;
if (pOptions) {
m_Options = *pOptions;
}
m_bDropObjects = bDropObjects;
m_bStdCS = bStdCS;
m_T3FillColor = fill_color;
m_pType3Char = pType3Char;
m_GroupFamily = GroupFamily;
m_bLoadMask = bLoadMask;
m_pFormResource = pFormResource;
m_pPageResource = m_pContext->GetPageResources();
if (pInitialStates && !m_pType3Char) {
m_InitialStates.CopyStates(*pInitialStates);
if (pParentState) {
if (!m_InitialStates.m_ColorState.HasFillColor()) {
m_InitialStates.m_ColorState.SetFillRGB(
pParentState->m_InitialStates.m_ColorState.GetFillRGB());
m_InitialStates.m_ColorState.GetMutableFillColor()->Copy(
pParentState->m_InitialStates.m_ColorState.GetFillColor());
}
if (!m_InitialStates.m_ColorState.HasStrokeColor()) {
m_InitialStates.m_ColorState.SetStrokeRGB(
pParentState->m_InitialStates.m_ColorState.GetFillRGB());
m_InitialStates.m_ColorState.GetMutableStrokeColor()->Copy(
pParentState->m_InitialStates.m_ColorState.GetStrokeColor());
}
}
} else {
m_InitialStates.DefaultStates();
}
m_pImageRenderer.reset();
m_Transparency = transparency;
return true;
}
void CPDF_RenderStatus::RenderObjectList(
const CPDF_PageObjectHolder* pObjectHolder,
const CFX_Matrix* pObj2Device) {
#if defined _SKIA_SUPPORT_
DebugVerifyDeviceIsPreMultiplied();
#endif
CFX_FloatRect clip_rect(m_pDevice->GetClipBox());
CFX_Matrix device2object;
device2object.SetReverse(*pObj2Device);
device2object.TransformRect(clip_rect);
for (const auto& pCurObj : *pObjectHolder->GetPageObjectList()) {
if (pCurObj.get() == m_pStopObj) {
m_bStopped = true;
return;
}
if (!pCurObj)
continue;
if (pCurObj->m_Left > clip_rect.right ||
pCurObj->m_Right < clip_rect.left ||
pCurObj->m_Bottom > clip_rect.top ||
pCurObj->m_Top < clip_rect.bottom) {
continue;
}
RenderSingleObject(pCurObj.get(), pObj2Device);
if (m_bStopped)
return;
}
#if defined _SKIA_SUPPORT_
DebugVerifyDeviceIsPreMultiplied();
#endif
}
void CPDF_RenderStatus::RenderSingleObject(CPDF_PageObject* pObj,
const CFX_Matrix* pObj2Device) {
#if defined _SKIA_SUPPORT_
DebugVerifyDeviceIsPreMultiplied();
#endif
CFX_AutoRestorer<int> restorer(&s_CurrentRecursionDepth);
if (++s_CurrentRecursionDepth > kRenderMaxRecursionDepth) {
return;
}
m_pCurObj = pObj;
if (m_Options.m_pOCContext && pObj->m_ContentMark) {
if (!m_Options.m_pOCContext->CheckObjectVisible(pObj)) {
return;
}
}
ProcessClipPath(pObj->m_ClipPath, pObj2Device);
if (ProcessTransparency(pObj, pObj2Device)) {
return;
}
ProcessObjectNoClip(pObj, pObj2Device);
#if defined _SKIA_SUPPORT_
DebugVerifyDeviceIsPreMultiplied();
#endif
}
bool CPDF_RenderStatus::ContinueSingleObject(CPDF_PageObject* pObj,
const CFX_Matrix* pObj2Device,
IFX_Pause* pPause) {
if (m_pImageRenderer) {
if (m_pImageRenderer->Continue(pPause))
return true;
if (!m_pImageRenderer->GetResult())
DrawObjWithBackground(pObj, pObj2Device);
m_pImageRenderer.reset();
return false;
}
m_pCurObj = pObj;
if (m_Options.m_pOCContext && pObj->m_ContentMark &&
!m_Options.m_pOCContext->CheckObjectVisible(pObj)) {
return false;
}
ProcessClipPath(pObj->m_ClipPath, pObj2Device);
if (ProcessTransparency(pObj, pObj2Device))
return false;
if (pObj->IsImage()) {
m_pImageRenderer = pdfium::MakeUnique<CPDF_ImageRenderer>();
if (!m_pImageRenderer->Start(this, pObj, pObj2Device, false,
FXDIB_BLEND_NORMAL)) {
if (!m_pImageRenderer->GetResult())
DrawObjWithBackground(pObj, pObj2Device);
m_pImageRenderer.reset();
return false;
}
return ContinueSingleObject(pObj, pObj2Device, pPause);
}
ProcessObjectNoClip(pObj, pObj2Device);
return false;
}
bool CPDF_RenderStatus::GetObjectClippedRect(const CPDF_PageObject* pObj,
const CFX_Matrix* pObj2Device,
bool bLogical,
FX_RECT& rect) const {
rect = pObj->GetBBox(pObj2Device);
FX_RECT rtClip = m_pDevice->GetClipBox();
if (!bLogical) {
CFX_Matrix dCTM = m_pDevice->GetCTM();
float a = fabs(dCTM.a);
float d = fabs(dCTM.d);
if (a != 1.0f || d != 1.0f) {
rect.right = rect.left + (int32_t)ceil((float)rect.Width() * a);
rect.bottom = rect.top + (int32_t)ceil((float)rect.Height() * d);
rtClip.right = rtClip.left + (int32_t)ceil((float)rtClip.Width() * a);
rtClip.bottom = rtClip.top + (int32_t)ceil((float)rtClip.Height() * d);
}
}
rect.Intersect(rtClip);
return rect.IsEmpty();
}
void CPDF_RenderStatus::ProcessObjectNoClip(CPDF_PageObject* pObj,
const CFX_Matrix* pObj2Device) {
#if defined _SKIA_SUPPORT_
DebugVerifyDeviceIsPreMultiplied();
#endif
bool bRet = false;
switch (pObj->GetType()) {
case CPDF_PageObject::TEXT:
bRet = ProcessText(pObj->AsText(), pObj2Device, nullptr);
break;
case CPDF_PageObject::PATH:
bRet = ProcessPath(pObj->AsPath(), pObj2Device);
break;
case CPDF_PageObject::IMAGE:
bRet = ProcessImage(pObj->AsImage(), pObj2Device);
break;
case CPDF_PageObject::SHADING:
ProcessShading(pObj->AsShading(), pObj2Device);
return;
case CPDF_PageObject::FORM:
bRet = ProcessForm(pObj->AsForm(), pObj2Device);
break;
}
if (!bRet)
DrawObjWithBackground(pObj, pObj2Device);
#if defined _SKIA_SUPPORT_
DebugVerifyDeviceIsPreMultiplied();
#endif
}
bool CPDF_RenderStatus::DrawObjWithBlend(CPDF_PageObject* pObj,
const CFX_Matrix* pObj2Device) {
bool bRet = false;
switch (pObj->GetType()) {
case CPDF_PageObject::PATH:
bRet = ProcessPath(pObj->AsPath(), pObj2Device);
break;
case CPDF_PageObject::IMAGE:
bRet = ProcessImage(pObj->AsImage(), pObj2Device);
break;
case CPDF_PageObject::FORM:
bRet = ProcessForm(pObj->AsForm(), pObj2Device);
break;
default:
break;
}
return bRet;
}
void CPDF_RenderStatus::GetScaledMatrix(CFX_Matrix& matrix) const {
CFX_Matrix dCTM = m_pDevice->GetCTM();
matrix.a *= fabs(dCTM.a);
matrix.d *= fabs(dCTM.d);
}
void CPDF_RenderStatus::DrawObjWithBackground(CPDF_PageObject* pObj,
const CFX_Matrix* pObj2Device) {
FX_RECT rect;
if (GetObjectClippedRect(pObj, pObj2Device, false, rect)) {
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, m_pDevice, rect, pObj, &m_Options, res)) {
return;
}
CFX_Matrix matrix = *pObj2Device;
matrix.Concat(*buffer.GetMatrix());
GetScaledMatrix(matrix);
CPDF_Dictionary* pFormResource = nullptr;
if (pObj->IsForm()) {
const CPDF_FormObject* pFormObj = pObj->AsForm();
if (pFormObj->m_pForm && pFormObj->m_pForm->m_pFormDict) {
pFormResource = pFormObj->m_pForm->m_pFormDict->GetDictFor("Resources");
}
}
CPDF_RenderStatus status;
status.Initialize(m_pContext, buffer.GetDevice(), buffer.GetMatrix(), nullptr,
nullptr, nullptr, &m_Options, m_Transparency,
m_bDropObjects, pFormResource);
status.RenderSingleObject(pObj, &matrix);
buffer.OutputToDevice();
}
bool CPDF_RenderStatus::ProcessForm(const CPDF_FormObject* pFormObj,
const CFX_Matrix* pObj2Device) {
#if defined _SKIA_SUPPORT_
DebugVerifyDeviceIsPreMultiplied();
#endif
CPDF_Dictionary* pOC = pFormObj->m_pForm->m_pFormDict->GetDictFor("OC");
if (pOC && m_Options.m_pOCContext &&
!m_Options.m_pOCContext->CheckOCGVisible(pOC)) {
return true;
}
CFX_Matrix matrix = pFormObj->m_FormMatrix;
matrix.Concat(*pObj2Device);
CPDF_Dictionary* pResources = nullptr;
if (pFormObj->m_pForm && pFormObj->m_pForm->m_pFormDict) {
pResources = pFormObj->m_pForm->m_pFormDict->GetDictFor("Resources");
}
CPDF_RenderStatus status;
status.Initialize(m_pContext, m_pDevice, nullptr, m_pStopObj, this, pFormObj,
&m_Options, m_Transparency, m_bDropObjects, pResources,
false);
status.m_curBlend = m_curBlend;
{
CFX_RenderDevice::StateRestorer restorer(m_pDevice);
status.RenderObjectList(pFormObj->m_pForm.get(), &matrix);
m_bStopped = status.m_bStopped;
}
#if defined _SKIA_SUPPORT_
DebugVerifyDeviceIsPreMultiplied();
#endif
return true;
}
bool CPDF_RenderStatus::ProcessPath(CPDF_PathObject* pPathObj,
const CFX_Matrix* pObj2Device) {
int FillType = pPathObj->m_FillType;
bool bStroke = pPathObj->m_bStroke;
ProcessPathPattern(pPathObj, pObj2Device, 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->m_Matrix;
path_matrix.Concat(*pObj2Device);
if (!IsAvailableMatrix(path_matrix))
return true;
if (FillType && (m_Options.m_Flags & RENDER_RECT_AA))
FillType |= FXFILL_RECT_AA;
if (m_Options.m_Flags & RENDER_FILL_FULLCOVER)
FillType |= FXFILL_FULLCOVER;
if (m_Options.m_Flags & RENDER_NOPATHSMOOTH)
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.m_Flags & RENDER_THINLINE)
graphState.SetLineWidth(0);
return m_pDevice->DrawPathWithBlend(
pPathObj->m_Path.GetObject(), &path_matrix, graphState.GetObject(),
fill_argb, stroke_argb, FillType, m_curBlend);
}
CFX_RetainPtr<CPDF_TransferFunc> CPDF_RenderStatus::GetTransferFunc(
CPDF_Object* pObj) const {
ASSERT(pObj);
CPDF_DocRenderData* pDocCache = m_pContext->GetDocument()->GetRenderData();
return pDocCache ? pDocCache->GetTransferFunc(pObj) : nullptr;
}
FX_ARGB CPDF_RenderStatus::GetFillArgb(CPDF_PageObject* pObj,
bool bType3) const {
const CPDF_ColorState* pColorState = &pObj->m_ColorState;
if (m_pType3Char && !bType3 &&
(!m_pType3Char->m_bColored ||
(m_pType3Char->m_bColored &&
(!*pColorState || pColorState->GetFillColor()->IsNull())))) {
return m_T3FillColor;
}
if (!*pColorState || pColorState->GetFillColor()->IsNull())
pColorState = &m_InitialStates.m_ColorState;
FX_COLORREF rgb = pColorState->GetFillRGB();
if (rgb == (uint32_t)-1)
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())
rgb = pObj->m_GeneralState.GetTransferFunc()->TranslateColor(rgb);
}
return m_Options.TranslateColor(ArgbEncode(alpha, rgb));
}
FX_ARGB CPDF_RenderStatus::GetStrokeArgb(CPDF_PageObject* pObj) const {
const CPDF_ColorState* pColorState = &pObj->m_ColorState;
if (m_pType3Char &&
(!m_pType3Char->m_bColored ||
(m_pType3Char->m_bColored &&
(!*pColorState || pColorState->GetStrokeColor()->IsNull())))) {
return m_T3FillColor;
}
if (!*pColorState || pColorState->GetStrokeColor()->IsNull())
pColorState = &m_InitialStates.m_ColorState;
FX_COLORREF rgb = pColorState->GetStrokeRGB();
if (rgb == (uint32_t)-1)
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())
rgb = pObj->m_GeneralState.GetTransferFunc()->TranslateColor(rgb);
}
return m_Options.TranslateColor(ArgbEncode(alpha, rgb));
}
void CPDF_RenderStatus::ProcessClipPath(CPDF_ClipPath ClipPath,
const CFX_Matrix* pObj2Device) {
if (!ClipPath) {
if (m_LastClipPath) {
m_pDevice->RestoreState(true);
m_LastClipPath.SetNull();
}
return;
}
if (m_LastClipPath == ClipPath)
return;
m_LastClipPath = ClipPath;
m_pDevice->RestoreState(true);
int nClipPath = ClipPath.GetPathCount();
for (int i = 0; i < nClipPath; ++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);
int fill_mode = FXFILL_WINDING;
m_pDevice->SetClip_PathFill(&EmptyPath, nullptr, fill_mode);
} else {
int ClipType = ClipPath.GetClipType(i);
m_pDevice->SetClip_PathFill(pPathData, pObj2Device, ClipType);
}
}
int textcount = ClipPath.GetTextCount();
if (textcount == 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 (int i = 0; i < textcount; ++i) {
CPDF_TextObject* pText = ClipPath.GetText(i);
if (pText) {
if (!pTextClippingPath)
pTextClippingPath = pdfium::MakeUnique<CFX_PathData>();
ProcessText(pText, pObj2Device, pTextClippingPath.get());
continue;
}
if (!pTextClippingPath)
continue;
int fill_mode = FXFILL_WINDING;
if (m_Options.m_Flags & RENDER_NOTEXTSMOOTH)
fill_mode |= FXFILL_NOPATHSMOOTH;
m_pDevice->SetClip_PathFill(pTextClippingPath.get(), nullptr, fill_mode);
pTextClippingPath.reset();
}
}
bool CPDF_RenderStatus::SelectClipPath(const CPDF_PathObject* pPathObj,
const CFX_Matrix* pObj2Device,
bool bStroke) {
CFX_Matrix path_matrix = pPathObj->m_Matrix;
path_matrix.Concat(*pObj2Device);
if (bStroke) {
CFX_GraphState graphState = pPathObj->m_GraphState;
if (m_Options.m_Flags & RENDER_THINLINE)
graphState.SetLineWidth(0);
return m_pDevice->SetClip_PathStroke(pPathObj->m_Path.GetObject(),
&path_matrix, graphState.GetObject());
}
int fill_mode = pPathObj->m_FillType;
if (m_Options.m_Flags & RENDER_NOPATHSMOOTH) {
fill_mode |= FXFILL_NOPATHSMOOTH;
}
return m_pDevice->SetClip_PathFill(pPathObj->m_Path.GetObject(), &path_matrix,
fill_mode);
}
bool CPDF_RenderStatus::ProcessTransparency(CPDF_PageObject* pPageObj,
const CFX_Matrix* pObj2Device) {
#if defined _SKIA_SUPPORT_
DebugVerifyDeviceIsPreMultiplied();
#endif
int blend_type = pPageObj->m_GeneralState.GetBlendType();
if (blend_type == FXDIB_BLEND_UNSUPPORTED)
return true;
CPDF_Dictionary* pSMaskDict =
ToDictionary(pPageObj->m_GeneralState.GetSoftMask());
if (pSMaskDict) {
if (pPageObj->IsImage() &&
pPageObj->AsImage()->GetImage()->GetDict()->KeyExist("SMask")) {
pSMaskDict = nullptr;
}
}
CPDF_Dictionary* pFormResource = nullptr;
float group_alpha = 1.0f;
int Transparency = m_Transparency;
bool bGroupTransparent = false;
if (pPageObj->IsForm()) {
const CPDF_FormObject* pFormObj = pPageObj->AsForm();
group_alpha = pFormObj->m_GeneralState.GetFillAlpha();
Transparency = pFormObj->m_pForm->m_Transparency;
bGroupTransparent = !!(Transparency & PDFTRANS_ISOLATED);
if (pFormObj->m_pForm->m_pFormDict) {
pFormResource = pFormObj->m_pForm->m_pFormDict->GetDictFor("Resources");
}
}
bool bTextClip =
(pPageObj->m_ClipPath && pPageObj->m_ClipPath.GetTextCount() &&
m_pDevice->GetDeviceClass() == FXDC_DISPLAY &&
!(m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_SOFT_CLIP));
if ((m_Options.m_Flags & RENDER_OVERPRINT) && 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->m_pDocument;
} else {
pDocument = pPageObj->AsImage()->GetImage()->GetDocument();
}
CPDF_Dictionary* pPageResources = pPage ? pPage->m_pPageResources : nullptr;
CPDF_Object* pCSObj = pPageObj->AsImage()
->GetImage()
->GetStream()
->GetDict()
->GetDirectObjectFor("ColorSpace");
CPDF_ColorSpace* pColorSpace =
pDocument->LoadColorSpace(pCSObj, pPageResources);
if (pColorSpace) {
int format = pColorSpace->GetFamily();
if (format == PDFCS_DEVICECMYK || format == PDFCS_SEPARATION ||
format == PDFCS_DEVICEN) {
blend_type = FXDIB_BLEND_DARKEN;
}
pDocument->GetPageData()->ReleaseColorSpace(pCSObj);
}
}
if (!pSMaskDict && group_alpha == 1.0f && blend_type == FXDIB_BLEND_NORMAL &&
!bTextClip && !bGroupTransparent) {
return false;
}
bool isolated = !!(Transparency & PDFTRANS_ISOLATED);
if (m_bPrint) {
bool bRet = false;
int rendCaps = m_pDevice->GetRenderCaps();
if (!((Transparency & PDFTRANS_ISOLATED) || pSMaskDict || bTextClip) &&
(rendCaps & FXRC_BLEND_MODE)) {
int oldBlend = m_curBlend;
m_curBlend = blend_type;
bRet = DrawObjWithBlend(pPageObj, pObj2Device);
m_curBlend = oldBlend;
}
if (!bRet) {
DrawObjWithBackground(pPageObj, pObj2Device);
}
return true;
}
FX_RECT rect = pPageObj->GetBBox(pObj2Device);
rect.Intersect(m_pDevice->GetClipBox());
if (rect.IsEmpty())
return true;
CFX_Matrix deviceCTM = m_pDevice->GetCTM();
float scaleX = fabs(deviceCTM.a);
float scaleY = fabs(deviceCTM.d);
int width = FXSYS_round((float)rect.Width() * scaleX);
int height = FXSYS_round((float)rect.Height() * scaleY);
CFX_FxgeDevice bitmap_device;
CFX_RetainPtr<CFX_DIBitmap> oriDevice;
if (!isolated && (m_pDevice->GetRenderCaps() & FXRC_GET_BITS)) {
oriDevice = pdfium::MakeRetain<CFX_DIBitmap>();
if (!m_pDevice->CreateCompatibleBitmap(oriDevice, width, height))
return true;
m_pDevice->GetDIBits(oriDevice, rect.left, rect.top);
}
if (!bitmap_device.Create(width, height, FXDIB_Argb, oriDevice))
return true;
CFX_RetainPtr<CFX_DIBitmap> bitmap = bitmap_device.GetBitmap();
bitmap->Clear(0);
CFX_Matrix new_matrix = *pObj2Device;
new_matrix.Translate(-rect.left, -rect.top);
new_matrix.Scale(scaleX, scaleY);
CFX_RetainPtr<CFX_DIBitmap> pTextMask;
if (bTextClip) {
pTextMask = pdfium::MakeRetain<CFX_DIBitmap>();
if (!pTextMask->Create(width, height, FXDIB_8bppMask))
return true;
pTextMask->Clear(0);
CFX_FxgeDevice text_device;
text_device.Attach(pTextMask, false, nullptr, false);
for (uint32_t i = 0; i < pPageObj->m_ClipPath.GetTextCount(); i++) {
CPDF_TextObject* textobj = pPageObj->m_ClipPath.GetText(i);
if (!textobj)
break;
CFX_Matrix text_matrix = textobj->GetTextMatrix();
CPDF_TextRenderer::DrawTextPath(
&text_device, textobj->m_CharCodes, textobj->m_CharPos,
textobj->m_TextState.GetFont(), textobj->m_TextState.GetFontSize(),
&text_matrix, &new_matrix, textobj->m_GraphState.GetObject(),
(FX_ARGB)-1, 0, nullptr, 0);
}
}
CPDF_RenderStatus bitmap_render;
bitmap_render.Initialize(m_pContext, &bitmap_device, nullptr, m_pStopObj,
nullptr, nullptr, &m_Options, 0, m_bDropObjects,
pFormResource, true);
bitmap_render.ProcessObjectNoClip(pPageObj, &new_matrix);
#if defined _SKIA_SUPPORT_PATHS_
bitmap_device.Flush();
bitmap->UnPreMultiply();
#endif
m_bStopped = bitmap_render.m_bStopped;
if (pSMaskDict) {
CFX_Matrix smask_matrix = *pPageObj->m_GeneralState.GetSMaskMatrix();
smask_matrix.Concat(*pObj2Device);
CFX_RetainPtr<CFX_DIBSource> pSMaskSource =
LoadSMask(pSMaskDict, &rect, &smask_matrix);
if (pSMaskSource)
bitmap->MultiplyAlpha(pSMaskSource);
}
if (pTextMask) {
bitmap->MultiplyAlpha(pTextMask);
pTextMask.Reset();
}
int32_t blitAlpha = 255;
if (Transparency & PDFTRANS_GROUP && group_alpha != 1.0f) {
blitAlpha = (int32_t)(group_alpha * 255);
#ifndef _SKIA_SUPPORT_
bitmap->MultiplyAlpha(blitAlpha);
blitAlpha = 255;
#endif
}
Transparency = m_Transparency;
if (pPageObj->IsForm()) {
Transparency |= PDFTRANS_GROUP;
}
CompositeDIBitmap(bitmap, rect.left, rect.top, 0, blitAlpha, blend_type,
Transparency);
#if defined _SKIA_SUPPORT_
DebugVerifyDeviceIsPreMultiplied();
#endif
return true;
}
CFX_RetainPtr<CFX_DIBitmap> CPDF_RenderStatus::GetBackdrop(
const CPDF_PageObject* pObj,
const FX_RECT& rect,
int& left,
int& top,
bool bBackAlphaRequired) {
FX_RECT bbox = rect;
bbox.Intersect(m_pDevice->GetClipBox());
left = bbox.left;
top = bbox.top;
CFX_Matrix deviceCTM = m_pDevice->GetCTM();
float scaleX = fabs(deviceCTM.a);
float scaleY = fabs(deviceCTM.d);
int width = FXSYS_round(bbox.Width() * scaleX);
int height = FXSYS_round(bbox.Height() * scaleY);
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);
FinalMatrix.Scale(scaleX, scaleY);
pBackdrop->Clear(pBackdrop->HasAlpha() ? 0 : 0xffffffff);
CFX_FxgeDevice 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.SetFillRGB(
bStroke ? pSrcStates->m_ColorState.GetStrokeRGB()
: pSrcStates->m_ColorState.GetFillRGB());
pStates->m_ColorState.SetStrokeRGB(pStates->m_ColorState.GetFillRGB());
}
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* pObj2Device,
CFX_PathData* pClippingPath) {
if (textobj->m_CharCodes.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, pObj2Device);
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->GetFace())
bStroke = true;
else
bFill = true;
break;
case TextRenderingMode::MODE_FILL_STROKE:
case TextRenderingMode::MODE_FILL_STROKE_CLIP:
bFill = true;
if (pFont->GetFace())
bStroke = true;
break;
case TextRenderingMode::MODE_INVISIBLE:
// Already handled above, but the compiler is not smart enough to
// realize it. Fall through.
ASSERT(false);
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, pObj2Device, pFont, font_size,
&text_matrix, bFill, bStroke);
return true;
}
if (bClip || bStroke) {
const CFX_Matrix* pDeviceMatrix = pObj2Device;
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.ConcatInverse(ctm);
device_matrix = ctm;
device_matrix.Concat(*pObj2Device);
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.m_Flags & RENDER_NOTEXTSMOOTH)
flag |= FXFILL_NOPATHSMOOTH;
return CPDF_TextRenderer::DrawTextPath(
m_pDevice, textobj->m_CharCodes, textobj->m_CharPos, pFont, font_size,
&text_matrix, pDeviceMatrix, textobj->m_GraphState.GetObject(),
fill_argb, stroke_argb, pClippingPath, flag);
}
text_matrix.Concat(*pObj2Device);
return CPDF_TextRenderer::DrawNormalText(m_pDevice, textobj->m_CharCodes,
textobj->m_CharPos, pFont, font_size,
&text_matrix, fill_argb, &m_Options);
}
CFX_RetainPtr<CPDF_Type3Cache> CPDF_RenderStatus::GetCachedType3(
CPDF_Type3Font* pFont) {
CPDF_Document* pDoc = pFont->m_pDocument;
if (!pDoc)
return nullptr;
pDoc->GetPageData()->GetFont(pFont->GetFontDict());
return pDoc->GetRenderData()->GetCachedType3(pFont);
}
// TODO(npm): Font fallback for type 3 fonts? (Completely separate code!!)
bool CPDF_RenderStatus::ProcessType3Text(CPDF_TextObject* textobj,
const CFX_Matrix* pObj2Device) {
CPDF_Type3Font* pType3Font = textobj->m_TextState.GetFont()->AsType3Font();
if (pdfium::ContainsValue(m_Type3FontCache, pType3Font))
return true;
CFX_Matrix dCTM = m_pDevice->GetCTM();
float sa = fabs(dCTM.a);
float sd = fabs(dCTM.d);
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);
FX_ARGB fill_argb = GetFillArgb(textobj, true);
int fill_alpha = FXARGB_A(fill_argb);
int device_class = m_pDevice->GetDeviceClass();
std::vector<FXTEXT_GLYPHPOS> glyphs;
if (device_class == FXDC_DISPLAY)
glyphs.resize(textobj->m_CharCodes.size());
else if (fill_alpha < 255)
return false;
CPDF_RefType3Cache refTypeCache(pType3Font);
for (int iChar = 0; iChar < pdfium::CollectionSize<int>(textobj->m_CharCodes);
iChar++) {
uint32_t charcode = textobj->m_CharCodes[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 ? textobj->m_CharPos[iChar - 1] : 0;
matrix.Concat(text_matrix);
matrix.Concat(*pObj2Device);
if (!pType3Char->LoadBitmap(m_pContext)) {
if (!glyphs.empty()) {
for (int i = 0; i < iChar; i++) {
const FXTEXT_GLYPHPOS& glyph = glyphs[i];
if (!glyph.m_pGlyph)
continue;
m_pDevice->SetBitMask(glyph.m_pGlyph->m_pBitmap,
glyph.m_Origin.x + glyph.m_pGlyph->m_Left,
glyph.m_Origin.y - glyph.m_pGlyph->m_Top,
fill_argb);
}
glyphs.clear();
}
std::unique_ptr<CPDF_GraphicStates> pStates =
CloneObjStates(textobj, false);
CPDF_RenderOptions Options = m_Options;
Options.m_Flags |= RENDER_FORCE_HALFTONE | RENDER_RECT_AA;
Options.m_Flags &= ~RENDER_FORCE_DOWNSAMPLE;
CPDF_Dictionary* pFormResource = nullptr;
if (pType3Char->m_pForm && pType3Char->m_pForm->m_pFormDict) {
pFormResource =
pType3Char->m_pForm->m_pFormDict->GetDictFor("Resources");
}
if (fill_alpha == 255) {
CPDF_RenderStatus status;
status.Initialize(m_pContext, m_pDevice, nullptr, nullptr, this,
pStates.get(), &Options,
pType3Char->m_pForm->m_Transparency, m_bDropObjects,
pFormResource, false, pType3Char, fill_argb);
status.m_Type3FontCache = m_Type3FontCache;
status.m_Type3FontCache.push_back(pType3Font);
CFX_RenderDevice::StateRestorer restorer(m_pDevice);
status.RenderObjectList(pType3Char->m_pForm.get(), &matrix);
} else {
CFX_FloatRect rect_f = pType3Char->m_pForm->CalcBoundingBox();
matrix.TransformRect(rect_f);
FX_RECT rect = rect_f.GetOuterRect();
CFX_FxgeDevice bitmap_device;
if (!bitmap_device.Create((int)(rect.Width() * sa),
(int)(rect.Height() * sd), FXDIB_Argb,
nullptr)) {
return true;
}
bitmap_device.GetBitmap()->Clear(0);
CPDF_RenderStatus status;
status.Initialize(m_pContext, &bitmap_device, nullptr, nullptr, this,
pStates.get(), &Options,
pType3Char->m_pForm->m_Transparency, m_bDropObjects,
pFormResource, false, pType3Char, fill_argb);
status.m_Type3FontCache = m_Type3FontCache;
status.m_Type3FontCache.push_back(pType3Font);
matrix.Translate(-rect.left, -rect.top);
matrix.Scale(sa, sd);
status.RenderObjectList(pType3Char->m_pForm.get(), &matrix);
m_pDevice->SetDIBits(bitmap_device.GetBitmap(), rect.left, rect.top);
}
} else if (pType3Char->m_pBitmap) {
if (device_class == FXDC_DISPLAY) {
CFX_RetainPtr<CPDF_Type3Cache> pCache = GetCachedType3(pType3Font);
refTypeCache.m_dwCount++;
CFX_GlyphBitmap* pBitmap = pCache->LoadGlyph(charcode, &matrix, sa, sd);
if (!pBitmap)
continue;
CFX_Point origin(FXSYS_round(matrix.e), FXSYS_round(matrix.f));
if (glyphs.empty()) {
m_pDevice->SetBitMask(pBitmap->m_pBitmap, origin.x + pBitmap->m_Left,
origin.y - pBitmap->m_Top, fill_argb);
} else {
glyphs[iChar].m_pGlyph = pBitmap;
glyphs[iChar].m_Origin = origin;
}
} else {
CFX_Matrix image_matrix = pType3Char->m_ImageMatrix;
image_matrix.Concat(matrix);
CPDF_ImageRenderer renderer;
if (renderer.Start(this, pType3Char->m_pBitmap, fill_argb, 255,
&image_matrix, 0, false, FXDIB_BLEND_NORMAL)) {
renderer.Continue(nullptr);
}
if (!renderer.GetResult())
return false;
}
}
}
if (glyphs.empty())
return true;
FX_RECT rect = FXGE_GetGlyphsBBox(glyphs, 0, sa, sd);
auto pBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
if (!pBitmap->Create(static_cast<int>(rect.Width() * sa),
static_cast<int>(rect.Height() * sd), FXDIB_8bppMask)) {
return true;
}
pBitmap->Clear(0);
for (const FXTEXT_GLYPHPOS& glyph : glyphs) {
if (!glyph.m_pGlyph)
continue;
pdfium::base::CheckedNumeric<int> left = glyph.m_Origin.x;
left += glyph.m_pGlyph->m_Left;
left -= rect.left;
left *= sa;
if (!left.IsValid())
continue;
pdfium::base::CheckedNumeric<int> top = glyph.m_Origin.y;
top -= glyph.m_pGlyph->m_Top;
top -= rect.top;
top *= sd;
if (!top.IsValid())
continue;
pBitmap->CompositeMask(left.ValueOrDie(), top.ValueOrDie(),
glyph.m_pGlyph->m_pBitmap->GetWidth(),
glyph.m_pGlyph->m_pBitmap->GetHeight(),
glyph.m_pGlyph->m_pBitmap, fill_argb, 0, 0,
FXDIB_BLEND_NORMAL, nullptr, false, 0);
}
m_pDevice->SetBitMask(pBitmap, rect.left, rect.top, fill_argb);
return true;
}
void CPDF_RenderStatus::DrawTextPathWithPattern(const CPDF_TextObject* textobj,
const CFX_Matrix* pObj2Device,
CPDF_Font* pFont,
float font_size,
const CFX_Matrix* pTextMatrix,
bool bFill,
bool bStroke) {
if (!bStroke) {
CPDF_PathObject path;
std::vector<std::unique_ptr<CPDF_TextObject>> pCopy;
pCopy.push_back(std::unique_ptr<CPDF_TextObject>(textobj->Clone()));
path.m_bStroke = false;
path.m_FillType = FXFILL_WINDING;
path.m_ClipPath.AppendTexts(&pCopy);
path.m_ColorState = textobj->m_ColorState;
path.m_Path.AppendRect(textobj->m_Left, textobj->m_Bottom, textobj->m_Right,
textobj->m_Top);
path.m_Left = textobj->m_Left;
path.m_Bottom = textobj->m_Bottom;
path.m_Right = textobj->m_Right;
path.m_Top = textobj->m_Top;
RenderSingleObject(&path, pObj2Device);
return;
}
CPDF_CharPosList CharPosList;
CharPosList.Load(textobj->m_CharCodes, textobj->m_CharPos, pFont, font_size);
for (uint32_t i = 0; i < CharPosList.m_nChars; i++) {
FXTEXT_CHARPOS& charpos = CharPosList.m_pCharPos[i];
auto* font =
charpos.m_FallbackFontPosition == -1
? &pFont->m_Font
: pFont->m_FontFallbacks[charpos.m_FallbackFontPosition].get();
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.m_Path.Append(pPath, &matrix);
path.m_Matrix = *pTextMatrix;
path.m_bStroke = bStroke;
path.m_FillType = bFill ? FXFILL_WINDING : 0;
path.CalcBoundingBox();
ProcessPath(&path, pObj2Device);
}
}
void CPDF_RenderStatus::DrawShading(CPDF_ShadingPattern* pPattern,
CFX_Matrix* pMatrix,
FX_RECT& clip_rect,
int alpha,
bool bAlphaMode) {
const auto& funcs = pPattern->GetFuncs();
CPDF_Dictionary* pDict = pPattern->GetShadingObject()->GetDict();
CPDF_ColorSpace* pColorSpace = pPattern->GetCS();
if (!pColorSpace)
return;
FX_ARGB background = 0;
if (!pPattern->IsShadingObject() && pDict->KeyExist("Background")) {
CPDF_Array* pBackColor = pDict->GetArrayFor("Background");
if (pBackColor &&
pBackColor->GetCount() >= pColorSpace->CountComponents()) {
CFX_FixedBufGrow<float, 16> comps(pColorSpace->CountComponents());
for (uint32_t i = 0; i < pColorSpace->CountComponents(); i++)
comps[i] = pBackColor->GetNumberAt(i);
float R = 0.0f;
float G = 0.0f;
float B = 0.0f;
pColorSpace->GetRGB(comps, &R, &G, &B);
background = ArgbEncode(255, (int32_t)(R * 255), (int32_t)(G * 255),
(int32_t)(B * 255));
}
}
if (pDict->KeyExist("BBox")) {
CFX_FloatRect rect = pDict->GetRectFor("BBox");
pMatrix->TransformRect(rect);
clip_rect.Intersect(rect.GetOuterRect());
}
if (m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_SHADING &&
m_pDevice->GetDeviceDriver()->DrawShading(pPattern, pMatrix, clip_rect,
alpha, bAlphaMode)) {
return;
}
CPDF_DeviceBuffer buffer;
buffer.Initialize(m_pContext, m_pDevice, &clip_rect, m_pCurObj, 150);
CFX_Matrix FinalMatrix = *pMatrix;
FinalMatrix.Concat(*buffer.GetMatrix());
CFX_RetainPtr<CFX_DIBitmap> pBitmap = buffer.GetBitmap();
if (!pBitmap->GetBuffer())
return;
pBitmap->Clear(background);
int fill_mode = m_Options.m_Flags;
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 (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 (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 (CPDF_Stream* pStream = ToStream(pPattern->GetShadingObject())) {
DrawCoonPatchMeshes(pPattern->GetShadingType(), pBitmap, &FinalMatrix,
pStream, funcs, pColorSpace, fill_mode, alpha);
}
} break;
}
if (bAlphaMode)
pBitmap->LoadChannel(FXDIB_Red, pBitmap, FXDIB_Alpha);
if (m_Options.m_ColorMode == RENDER_COLOR_GRAY)
pBitmap->ConvertColorScale(m_Options.m_ForeColor, m_Options.m_BackColor);
buffer.OutputToDevice();
}
void CPDF_RenderStatus::DrawShadingPattern(CPDF_ShadingPattern* pattern,
const CPDF_PageObject* pPageObj,
const CFX_Matrix* pObj2Device,
bool bStroke) {
if (!pattern->Load())
return;
CFX_RenderDevice::StateRestorer restorer(m_pDevice);
if (pPageObj->IsPath()) {
if (!SelectClipPath(pPageObj->AsPath(), pObj2Device, bStroke))
return;
} else if (pPageObj->IsImage()) {
m_pDevice->SetClip_Rect(pPageObj->GetBBox(pObj2Device));
} else {
return;
}
FX_RECT rect;
if (GetObjectClippedRect(pPageObj, pObj2Device, false, rect))
return;
CFX_Matrix matrix = *pattern->pattern_to_form();
matrix.Concat(*pObj2Device);
GetScaledMatrix(matrix);
int alpha =
FXSYS_round(255 * (bStroke ? pPageObj->m_GeneralState.GetStrokeAlpha()
: pPageObj->m_GeneralState.GetFillAlpha()));
DrawShading(pattern, &matrix, rect, alpha,
m_Options.m_ColorMode == RENDER_COLOR_ALPHA);
}
void CPDF_RenderStatus::ProcessShading(const CPDF_ShadingObject* pShadingObj,
const CFX_Matrix* pObj2Device) {
FX_RECT rect = pShadingObj->GetBBox(pObj2Device);
FX_RECT clip_box = m_pDevice->GetClipBox();
rect.Intersect(clip_box);
if (rect.IsEmpty())
return;
CFX_Matrix matrix = pShadingObj->m_Matrix;
matrix.Concat(*pObj2Device);
DrawShading(pShadingObj->m_pShading, &matrix, rect,
FXSYS_round(255 * pShadingObj->m_GeneralState.GetFillAlpha()),
m_Options.m_ColorMode == RENDER_COLOR_ALPHA);
}
void CPDF_RenderStatus::DrawTilingPattern(CPDF_TilingPattern* pPattern,
CPDF_PageObject* pPageObj,
const CFX_Matrix* pObj2Device,
bool bStroke) {
if (!pPattern->Load())
return;
CFX_RenderDevice::StateRestorer restorer(m_pDevice);
if (pPageObj->IsPath()) {
if (!SelectClipPath(pPageObj->AsPath(), pObj2Device, bStroke))
return;
} else if (pPageObj->IsImage()) {
m_pDevice->SetClip_Rect(pPageObj->GetBBox(pObj2Device));
} else {
return;
}
FX_RECT clip_box = m_pDevice->GetClipBox();
if (clip_box.IsEmpty())
return;
CFX_Matrix dCTM = m_pDevice->GetCTM();
float sa = fabs(dCTM.a);
float sd = fabs(dCTM.d);
clip_box.right = clip_box.left + (int32_t)ceil(clip_box.Width() * sa);
clip_box.bottom = clip_box.top + (int32_t)ceil(clip_box.Height() * sd);
CFX_Matrix mtPattern2Device = *pPattern->pattern_to_form();
mtPattern2Device.Concat(*pObj2Device);
GetScaledMatrix(mtPattern2Device);
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());
CFX_FloatRect cell_bbox = pPattern->bbox();
mtPattern2Device.TransformRect(cell_bbox);
int width = static_cast<int>(ceil(cell_bbox.Width()));
int height = static_cast<int>(ceil(cell_bbox.Height()));
if (width == 0)
width = 1;
if (height == 0)
height = 1;
CFX_Matrix mtDevice2Pattern;
mtDevice2Pattern.SetReverse(mtPattern2Device);
CFX_FloatRect clip_box_p(clip_box);
mtDevice2Pattern.TransformRect(clip_box_p);
int min_col = (int)ceil((clip_box_p.left - pPattern->bbox().right) /
pPattern->x_step());
int max_col = (int)floor((clip_box_p.right - pPattern->bbox().left) /
pPattern->x_step());
int min_row = (int)ceil((clip_box_p.bottom - pPattern->bbox().top) /
pPattern->y_step());
int max_row = (int)floor((clip_box_p.top - pPattern->bbox().bottom) /
pPattern->y_step());
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);
CPDF_Dictionary* pFormResource = nullptr;
if (pPattern->form()->m_pFormDict)
pFormResource = pPattern->form()->m_pFormDict->GetDictFor("Resources");
for (int col = min_col; col <= max_col; col++) {
for (int row = min_row; row <= max_row; row++) {
CFX_PointF original = mtPattern2Device.Transform(
CFX_PointF(col * pPattern->x_step(), row * pPattern->y_step()));
CFX_Matrix matrix = *pObj2Device;
matrix.Translate(original.x - mtPattern2Device.e,
original.y - mtPattern2Device.f);
CFX_RenderDevice::StateRestorer restorer2(m_pDevice);
CPDF_RenderStatus status;
status.Initialize(m_pContext, m_pDevice, nullptr, nullptr, this,
pStates.get(), &m_Options,
pPattern->form()->m_Transparency, m_bDropObjects,
pFormResource);
status.RenderObjectList(pPattern->form(), &matrix);
}
}
return;
}
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;
CFX_RetainPtr<CFX_DIBitmap> pPatternBitmap;
if (width * height < 16) {
CFX_RetainPtr<CFX_DIBitmap> pEnlargedBitmap =
DrawPatternBitmap(m_pContext->GetDocument(), m_pContext->GetPageCache(),
pPattern, pObj2Device, 8, 8, m_Options.m_Flags);
pPatternBitmap = pEnlargedBitmap->StretchTo(width, height);
} else {
pPatternBitmap = DrawPatternBitmap(
m_pContext->GetDocument(), m_pContext->GetPageCache(), pPattern,
pObj2Device, width, height, m_Options.m_Flags);
}
if (!pPatternBitmap)
return;
if (m_Options.m_ColorMode == RENDER_COLOR_GRAY) {
pPatternBitmap->ConvertColorScale(m_Options.m_ForeColor,
m_Options.m_BackColor);
}
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);
uint32_t* src_buf = (uint32_t*)pPatternBitmap->GetBuffer();
for (int col = min_col; col <= max_col; col++) {
for (int row = min_row; row <= max_row; row++) {
int start_x, 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 =
(uint32_t*)(pScreen->GetBuffer() + pScreen->GetPitch() * start_y +
start_x * 4);
if (pPattern->colored())
*dest_buf = *src_buf;
else
*dest_buf = (*(uint8_t*)src_buf << 24) | (fill_argb & 0xffffff);
} else {
if (pPattern->colored()) {
pScreen->CompositeBitmap(start_x, start_y, width, height,
pPatternBitmap, 0, 0);
} else {
pScreen->CompositeMask(start_x, start_y, width, height,
pPatternBitmap, fill_argb, 0, 0);
}
}
}
}
CompositeDIBitmap(pScreen, clip_box.left, clip_box.top, 0, 255,
FXDIB_BLEND_NORMAL, false);
}