Split shading rendering code into its own file. Move shading code, which makes up 1/3 of cpdf_renderstatus.cpp, into cpdf_rendershading.cpp. Change-Id: Idc8c5456aa3e1209630177ef210a8653b0b0f181 Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/61030 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
diff --git a/core/fpdfapi/render/BUILD.gn b/core/fpdfapi/render/BUILD.gn index 8378de6..d7cc9b6 100644 --- a/core/fpdfapi/render/BUILD.gn +++ b/core/fpdfapi/render/BUILD.gn
@@ -30,6 +30,8 @@ "cpdf_rendercontext.h", "cpdf_renderoptions.cpp", "cpdf_renderoptions.h", + "cpdf_rendershading.cpp", + "cpdf_rendershading.h", "cpdf_renderstatus.cpp", "cpdf_renderstatus.h", "cpdf_scaledrenderbuffer.cpp",
diff --git a/core/fpdfapi/render/cpdf_rendershading.cpp b/core/fpdfapi/render/cpdf_rendershading.cpp new file mode 100644 index 0000000..0ac8043 --- /dev/null +++ b/core/fpdfapi/render/cpdf_rendershading.cpp
@@ -0,0 +1,954 @@ +// Copyright 2019 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_rendershading.h" + +#include <algorithm> +#include <array> +#include <cmath> +#include <memory> +#include <utility> +#include <vector> + +#include "core/fpdfapi/page/cpdf_colorspace.h" +#include "core/fpdfapi/page/cpdf_dibbase.h" +#include "core/fpdfapi/page/cpdf_function.h" +#include "core/fpdfapi/page/cpdf_meshstream.h" +#include "core/fpdfapi/parser/cpdf_array.h" +#include "core/fpdfapi/parser/cpdf_dictionary.h" +#include "core/fpdfapi/parser/cpdf_stream.h" +#include "core/fpdfapi/parser/fpdf_parser_utility.h" +#include "core/fpdfapi/render/cpdf_devicebuffer.h" +#include "core/fpdfapi/render/cpdf_renderoptions.h" +#include "core/fxcrt/fx_safe_types.h" +#include "core/fxcrt/fx_system.h" +#include "core/fxge/cfx_defaultrenderdevice.h" +#include "core/fxge/dib/cfx_dibitmap.h" +#include "core/fxge/fx_dib.h" + +namespace { + +constexpr int kShadingSteps = 256; + +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_roundf(R * 255), + FXSYS_roundf(G * 255), FXSYS_roundf(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); + } + pArray = pDict->GetArrayFor("Extend"); + const bool bStartExtend = pArray && pArray->GetBooleanAt(0, false); + const bool bEndExtend = pArray && pArray->GetBooleanAt(1, false); + + 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); + } + pArray = pDict->GetArrayFor("Extend"); + const bool bStartExtend = pArray && pArray->GetBooleanAt(0, false); + const bool bEndExtend = pArray && pArray->GetBooleanAt(1, false); + + 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); + } +} + +} // namespace + +// static +void CPDF_RenderShading::Draw(CFX_RenderDevice* pDevice, + CPDF_RenderContext* pContext, + const CPDF_PageObject* pCurObj, + const CPDF_ShadingPattern* pPattern, + const CFX_Matrix& mtMatrix, + const FX_RECT& clip_rect, + int alpha, + const CPDF_RenderOptions& options) { + 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()); + } + bool bAlphaMode = options.ColorModeIs(CPDF_RenderOptions::kAlpha); + if (pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_SHADING && + pDevice->GetDeviceDriver()->DrawShading( + pPattern, &mtMatrix, clip_rect_bbox, alpha, bAlphaMode)) { + return; + } + CPDF_DeviceBuffer buffer(pContext, pDevice, clip_rect_bbox, pCurObj, 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, + options.GetOptions().bNoPathSmooth, alpha); + } + } break; + } + if (bAlphaMode) + pBitmap->LoadChannelFromAlpha(FXDIB_Red, pBitmap); + + if (options.ColorModeIs(CPDF_RenderOptions::kGray)) + pBitmap->ConvertColorScale(0, 0xffffff); + buffer.OutputToDevice(); +}
diff --git a/core/fpdfapi/render/cpdf_rendershading.h b/core/fpdfapi/render/cpdf_rendershading.h new file mode 100644 index 0000000..8c0d8a4 --- /dev/null +++ b/core/fpdfapi/render/cpdf_rendershading.h
@@ -0,0 +1,34 @@ +// Copyright 2019 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 + +#ifndef CORE_FPDFAPI_RENDER_CPDF_RENDERSHADING_H_ +#define CORE_FPDFAPI_RENDER_CPDF_RENDERSHADING_H_ + +class CFX_Matrix; +class CFX_RenderDevice; +class CPDF_PageObject; +class CPDF_RenderContext; +class CPDF_RenderOptions; +class CPDF_ShadingPattern; +struct FX_RECT; + +class CPDF_RenderShading { + public: + static void Draw(CFX_RenderDevice* pDevice, + CPDF_RenderContext* pContext, + const CPDF_PageObject* pCurObj, + const CPDF_ShadingPattern* pPattern, + const CFX_Matrix& mtMatrix, + const FX_RECT& clip_rect, + int alpha, + const CPDF_RenderOptions& options); + + CPDF_RenderShading() = delete; + CPDF_RenderShading(const CPDF_RenderShading&) = delete; + CPDF_RenderShading& operator=(const CPDF_RenderShading&) = delete; +}; + +#endif // CORE_FPDFAPI_RENDER_CPDF_RENDERSHADING_H_
diff --git a/core/fpdfapi/render/cpdf_renderstatus.cpp b/core/fpdfapi/render/cpdf_renderstatus.cpp index 89b815b..217ad71 100644 --- a/core/fpdfapi/render/cpdf_renderstatus.cpp +++ b/core/fpdfapi/render/cpdf_renderstatus.cpp
@@ -7,7 +7,6 @@ #include "core/fpdfapi/render/cpdf_renderstatus.h" #include <algorithm> -#include <array> #include <cmath> #include <limits> #include <memory> @@ -20,7 +19,6 @@ #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_dibbase.h" #include "core/fpdfapi/page/cpdf_docpagedata.h" #include "core/fpdfapi/page/cpdf_form.h" #include "core/fpdfapi/page/cpdf_formobject.h" @@ -28,7 +26,6 @@ #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" @@ -43,22 +40,20 @@ #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_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_rendershading.h" #include "core/fpdfapi/render/cpdf_scaledrenderbuffer.h" #include "core/fpdfapi/render/cpdf_textrenderer.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/dib/cfx_dibitmap.h" #include "core/fxge/fx_font.h" @@ -77,829 +72,9 @@ namespace { -constexpr int kShadingSteps = 256; constexpr int kRenderMaxRecursionDepth = 64; int g_CurrentRecursionDepth = 0; -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_roundf(R * 255), - FXSYS_roundf(G * 255), FXSYS_roundf(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); - } - pArray = pDict->GetArrayFor("Extend"); - const bool bStartExtend = pArray && pArray->GetBooleanAt(0, false); - const bool bEndExtend = pArray && pArray->GetBooleanAt(1, false); - - 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); - } - pArray = pDict->GetArrayFor("Extend"); - const bool bStartExtend = pArray && pArray->GetBooleanAt(0, false); - const bool bEndExtend = pArray && pArray->GetBooleanAt(1, false); - - 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, @@ -1995,101 +1170,6 @@ } } -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, @@ -2109,8 +1189,8 @@ int alpha = FXSYS_roundf(255 * (bStroke ? pPageObj->m_GeneralState.GetStrokeAlpha() : pPageObj->m_GeneralState.GetFillAlpha())); - DrawShading(pattern, matrix, rect, alpha, - m_Options.ColorModeIs(CPDF_RenderOptions::kAlpha)); + CPDF_RenderShading::Draw(m_pDevice, m_pContext.Get(), m_pCurObj.Get(), + pattern, matrix, rect, alpha, m_Options); } void CPDF_RenderStatus::ProcessShading(const CPDF_ShadingObject* pShadingObj, @@ -2122,9 +1202,11 @@ return; CFX_Matrix matrix = pShadingObj->matrix() * mtObj2Device; - DrawShading(pShadingObj->pattern(), matrix, rect, - FXSYS_roundf(255 * pShadingObj->m_GeneralState.GetFillAlpha()), - m_Options.ColorModeIs(CPDF_RenderOptions::kAlpha)); + CPDF_RenderShading::Draw( + m_pDevice, m_pContext.Get(), m_pCurObj.Get(), pShadingObj->pattern(), + matrix, rect, + FXSYS_roundf(255 * pShadingObj->m_GeneralState.GetFillAlpha()), + m_Options); } void CPDF_RenderStatus::DrawTilingPattern(CPDF_TilingPattern* pPattern,
diff --git a/core/fpdfapi/render/cpdf_renderstatus.h b/core/fpdfapi/render/cpdf_renderstatus.h index 193a7d3..76eb71c 100644 --- a/core/fpdfapi/render/cpdf_renderstatus.h +++ b/core/fpdfapi/render/cpdf_renderstatus.h
@@ -152,11 +152,6 @@ const CFX_Matrix& mtObj2Device); void ProcessShading(const CPDF_ShadingObject* pShadingObj, const CFX_Matrix& mtObj2Device); - void DrawShading(const CPDF_ShadingPattern* pPattern, - const CFX_Matrix& mtMatrix, - const FX_RECT& clip_rect, - int alpha, - bool bAlphaMode); bool ProcessType3Text(CPDF_TextObject* textobj, const CFX_Matrix& mtObj2Device); bool ProcessText(CPDF_TextObject* textobj,