// Copyright 2014 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/fpdf_render/render_int.h" #include "core/fpdfapi/fpdf_page/cpdf_graphicstates.h" #include "core/fpdfapi/fpdf_page/cpdf_meshstream.h" #include "core/fpdfapi/fpdf_page/cpdf_parseoptions.h" #include "core/fpdfapi/fpdf_page/cpdf_shadingpattern.h" #include "core/fpdfapi/fpdf_page/cpdf_tilingpattern.h" #include "core/fpdfapi/fpdf_page/include/cpdf_form.h" #include "core/fpdfapi/fpdf_page/include/cpdf_pageobject.h" #include "core/fpdfapi/fpdf_page/include/cpdf_pathobject.h" #include "core/fpdfapi/fpdf_page/include/cpdf_shadingobject.h" #include "core/fpdfapi/fpdf_page/pageint.h" #include "core/fpdfapi/fpdf_parser/include/cpdf_array.h" #include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h" #include "core/fpdfapi/fpdf_render/include/cpdf_rendercontext.h" #include "core/fpdfapi/fpdf_render/include/cpdf_renderoptions.h" #include "core/include/fxge/fx_ge.h" #define SHADING_STEPS 256 static void DrawAxialShading(CFX_DIBitmap* pBitmap, CFX_Matrix* pObject2Bitmap, CPDF_Dictionary* pDict, CPDF_Function** pFuncs, int nFuncs, CPDF_ColorSpace* pCS, int alpha) { ASSERT(pBitmap->GetFormat() == FXDIB_Argb); CPDF_Array* pCoords = pDict->GetArrayBy("Coords"); if (!pCoords) { return; } FX_FLOAT start_x = pCoords->GetNumberAt(0); FX_FLOAT start_y = pCoords->GetNumberAt(1); FX_FLOAT end_x = pCoords->GetNumberAt(2); FX_FLOAT end_y = pCoords->GetNumberAt(3); FX_FLOAT t_min = 0, t_max = 1.0f; CPDF_Array* pArray = pDict->GetArrayBy("Domain"); if (pArray) { t_min = pArray->GetNumberAt(0); t_max = pArray->GetNumberAt(1); } FX_BOOL bStartExtend = FALSE, bEndExtend = FALSE; pArray = pDict->GetArrayBy("Extend"); if (pArray) { bStartExtend = pArray->GetIntegerAt(0); bEndExtend = pArray->GetIntegerAt(1); } int width = pBitmap->GetWidth(); int height = pBitmap->GetHeight(); FX_FLOAT x_span = end_x - start_x; FX_FLOAT y_span = end_y - start_y; FX_FLOAT axis_len_square = (x_span * x_span) + (y_span * y_span); CFX_Matrix matrix; matrix.SetReverse(*pObject2Bitmap); int total_results = 0; for (int j = 0; j < nFuncs; j++) { if (pFuncs[j]) { total_results += pFuncs[j]->CountOutputs(); } } if (pCS->CountComponents() > total_results) { total_results = pCS->CountComponents(); } CFX_FixedBufGrow result_array(total_results); FX_FLOAT* pResults = result_array; FXSYS_memset(pResults, 0, total_results * sizeof(FX_FLOAT)); FX_DWORD rgb_array[SHADING_STEPS]; for (int i = 0; i < SHADING_STEPS; i++) { FX_FLOAT input = (t_max - t_min) * i / SHADING_STEPS + t_min; int offset = 0; for (int j = 0; j < nFuncs; j++) { if (pFuncs[j]) { int nresults = 0; if (pFuncs[j]->Call(&input, 1, pResults + offset, nresults)) { offset += nresults; } } } FX_FLOAT R = 0.0f, G = 0.0f, 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++) { FX_DWORD* dib_buf = (FX_DWORD*)(pBitmap->GetBuffer() + row * pitch); for (int column = 0; column < width; column++) { FX_FLOAT x = (FX_FLOAT)column, y = (FX_FLOAT)row; matrix.Transform(x, y); FX_FLOAT scale = (((x - start_x) * x_span) + ((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]; } } } static void DrawRadialShading(CFX_DIBitmap* pBitmap, CFX_Matrix* pObject2Bitmap, CPDF_Dictionary* pDict, CPDF_Function** pFuncs, int nFuncs, CPDF_ColorSpace* pCS, int alpha) { ASSERT(pBitmap->GetFormat() == FXDIB_Argb); CPDF_Array* pCoords = pDict->GetArrayBy("Coords"); if (!pCoords) { return; } FX_FLOAT start_x = pCoords->GetNumberAt(0); FX_FLOAT start_y = pCoords->GetNumberAt(1); FX_FLOAT start_r = pCoords->GetNumberAt(2); FX_FLOAT end_x = pCoords->GetNumberAt(3); FX_FLOAT end_y = pCoords->GetNumberAt(4); FX_FLOAT end_r = pCoords->GetNumberAt(5); CFX_Matrix matrix; matrix.SetReverse(*pObject2Bitmap); FX_FLOAT t_min = 0, t_max = 1.0f; CPDF_Array* pArray = pDict->GetArrayBy("Domain"); if (pArray) { t_min = pArray->GetNumberAt(0); t_max = pArray->GetNumberAt(1); } FX_BOOL bStartExtend = FALSE, bEndExtend = FALSE; pArray = pDict->GetArrayBy("Extend"); if (pArray) { bStartExtend = pArray->GetIntegerAt(0); bEndExtend = pArray->GetIntegerAt(1); } int total_results = 0; for (int j = 0; j < nFuncs; j++) { if (pFuncs[j]) { total_results += pFuncs[j]->CountOutputs(); } } if (pCS->CountComponents() > total_results) { total_results = pCS->CountComponents(); } CFX_FixedBufGrow result_array(total_results); FX_FLOAT* pResults = result_array; FXSYS_memset(pResults, 0, total_results * sizeof(FX_FLOAT)); FX_DWORD rgb_array[SHADING_STEPS]; for (int i = 0; i < SHADING_STEPS; i++) { FX_FLOAT input = (t_max - t_min) * i / SHADING_STEPS + t_min; int offset = 0; for (int j = 0; j < nFuncs; j++) { if (pFuncs[j]) { int nresults; if (pFuncs[j]->Call(&input, 1, pResults + offset, nresults)) { offset += nresults; } } } FX_FLOAT R = 0.0f, G = 0.0f, 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))); } FX_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(); FX_BOOL bDecreasing = FALSE; if (start_r > end_r) { int length = (int)FXSYS_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++) { FX_DWORD* dib_buf = (FX_DWORD*)(pBitmap->GetBuffer() + row * pitch); for (int column = 0; column < width; column++) { FX_FLOAT x = (FX_FLOAT)column, y = (FX_FLOAT)row; matrix.Transform(x, y); FX_FLOAT b = -2 * (((x - start_x) * (end_x - start_x)) + ((y - start_y) * (end_y - start_y)) + (start_r * (end_r - start_r))); FX_FLOAT c = ((x - start_x) * (x - start_x)) + ((y - start_y) * (y - start_y)) - (start_r * start_r); FX_FLOAT s; if (a == 0) { s = -c / b; } else { FX_FLOAT b2_4ac = (b * b) - 4 * (a * c); if (b2_4ac < 0) { continue; } FX_FLOAT root = FXSYS_sqrt(b2_4ac); FX_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]; } } } static void DrawFuncShading(CFX_DIBitmap* pBitmap, CFX_Matrix* pObject2Bitmap, CPDF_Dictionary* pDict, CPDF_Function** pFuncs, int nFuncs, CPDF_ColorSpace* pCS, int alpha) { ASSERT(pBitmap->GetFormat() == FXDIB_Argb); CPDF_Array* pDomain = pDict->GetArrayBy("Domain"); FX_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->GetMatrixBy("Matrix"); CFX_Matrix matrix, reverse_matrix; matrix.SetReverse(*pObject2Bitmap); reverse_matrix.SetReverse(mtDomain2Target); matrix.Concat(reverse_matrix); int width = pBitmap->GetWidth(); int height = pBitmap->GetHeight(); int pitch = pBitmap->GetPitch(); int total_results = 0; for (int j = 0; j < nFuncs; j++) { if (pFuncs[j]) { total_results += pFuncs[j]->CountOutputs(); } } if (pCS->CountComponents() > total_results) { total_results = pCS->CountComponents(); } CFX_FixedBufGrow result_array(total_results); FX_FLOAT* pResults = result_array; FXSYS_memset(pResults, 0, total_results * sizeof(FX_FLOAT)); for (int row = 0; row < height; row++) { FX_DWORD* dib_buf = (FX_DWORD*)(pBitmap->GetBuffer() + row * pitch); for (int column = 0; column < width; column++) { FX_FLOAT x = (FX_FLOAT)column, y = (FX_FLOAT)row; matrix.Transform(x, y); if (x < xmin || x > xmax || y < ymin || y > ymax) { continue; } FX_FLOAT input[2]; int offset = 0; input[0] = x; input[1] = y; for (int j = 0; j < nFuncs; j++) { if (pFuncs[j]) { int nresults; if (pFuncs[j]->Call(input, 2, pResults + offset, nresults)) { offset += nresults; } } } FX_FLOAT R = 0.0f, G = 0.0f, 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))); } } } FX_BOOL _GetScanlineIntersect(int y, FX_FLOAT x1, FX_FLOAT y1, FX_FLOAT x2, FX_FLOAT y2, FX_FLOAT& x) { if (y1 == y2) { return FALSE; } if (y1 < y2) { if (y < y1 || y > y2) { return FALSE; } } else { if (y < y2 || y > y1) { return FALSE; } } x = x1 + ((x2 - x1) * (y - y1) / (y2 - y1)); return TRUE; } static void DrawGouraud(CFX_DIBitmap* pBitmap, int alpha, CPDF_MeshVertex triangle[3]) { FX_FLOAT min_y = triangle[0].y, max_y = triangle[0].y; for (int i = 1; i < 3; i++) { if (min_y > triangle[i].y) { min_y = triangle[i].y; } if (max_y < triangle[i].y) { max_y = triangle[i].y; } } if (min_y == max_y) { return; } int min_yi = (int)FXSYS_floor(min_y), max_yi = (int)FXSYS_ceil(max_y); if (min_yi < 0) { min_yi = 0; } if (max_yi >= pBitmap->GetHeight()) { max_yi = pBitmap->GetHeight() - 1; } for (int y = min_yi; y <= max_yi; y++) { int nIntersects = 0; FX_FLOAT inter_x[3], r[3], g[3], b[3]; for (int i = 0; i < 3; i++) { CPDF_MeshVertex& vertex1 = triangle[i]; CPDF_MeshVertex& vertex2 = triangle[(i + 1) % 3]; FX_BOOL bIntersect = _GetScanlineIntersect( y, vertex1.x, vertex1.y, vertex2.x, vertex2.y, inter_x[nIntersects]); if (!bIntersect) { continue; } FX_FLOAT y_dist = (y - vertex1.y) / (vertex2.y - vertex1.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)FXSYS_floor(inter_x[0]); max_x = (int)FXSYS_ceil(inter_x[1]); start_index = 0; end_index = 1; } else { min_x = (int)FXSYS_floor(inter_x[1]); max_x = (int)FXSYS_ceil(inter_x[0]); start_index = 1; end_index = 0; } int start_x = min_x, end_x = max_x; if (start_x < 0) { start_x = 0; } if (end_x > pBitmap->GetWidth()) { end_x = pBitmap->GetWidth(); } uint8_t* dib_buf = pBitmap->GetBuffer() + y * pBitmap->GetPitch() + start_x * 4; FX_FLOAT r_unit = (r[end_index] - r[start_index]) / (max_x - min_x); FX_FLOAT g_unit = (g[end_index] - g[start_index]) / (max_x - min_x); FX_FLOAT b_unit = (b[end_index] - b[start_index]) / (max_x - min_x); FX_FLOAT R = r[start_index] + (start_x - min_x) * r_unit; FX_FLOAT G = g[start_index] + (start_x - min_x) * g_unit; FX_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; } } } static void DrawFreeGouraudShading(CFX_DIBitmap* pBitmap, CFX_Matrix* pObject2Bitmap, CPDF_Stream* pShadingStream, CPDF_Function** pFuncs, int nFuncs, CPDF_ColorSpace* pCS, int alpha) { ASSERT(pBitmap->GetFormat() == FXDIB_Argb); CPDF_MeshStream stream; if (!stream.Load(pShadingStream, pFuncs, nFuncs, pCS)) return; CPDF_MeshVertex triangle[3]; FXSYS_memset(triangle, 0, sizeof(triangle)); while (!stream.m_BitStream.IsEOF()) { CPDF_MeshVertex vertex; FX_DWORD flag = stream.GetVertex(vertex, pObject2Bitmap); if (flag == 0) { triangle[0] = vertex; for (int j = 1; j < 3; j++) { stream.GetVertex(triangle[j], pObject2Bitmap); } } else { if (flag == 1) { triangle[0] = triangle[1]; } triangle[1] = triangle[2]; triangle[2] = vertex; } DrawGouraud(pBitmap, alpha, triangle); } } static void DrawLatticeGouraudShading(CFX_DIBitmap* pBitmap, CFX_Matrix* pObject2Bitmap, CPDF_Stream* pShadingStream, CPDF_Function** pFuncs, int nFuncs, CPDF_ColorSpace* pCS, int alpha) { ASSERT(pBitmap->GetFormat() == FXDIB_Argb); int row_verts = pShadingStream->GetDict()->GetIntegerBy("VerticesPerRow"); if (row_verts < 2) return; CPDF_MeshStream stream; if (!stream.Load(pShadingStream, pFuncs, nFuncs, pCS)) return; CPDF_MeshVertex* vertex = FX_Alloc2D(CPDF_MeshVertex, row_verts, 2); if (!stream.GetVertexRow(vertex, row_verts, pObject2Bitmap)) { FX_Free(vertex); return; } int last_index = 0; while (1) { CPDF_MeshVertex* last_row = vertex + last_index * row_verts; CPDF_MeshVertex* this_row = vertex + (1 - last_index) * row_verts; if (!stream.GetVertexRow(this_row, row_verts, pObject2Bitmap)) { FX_Free(vertex); 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; } FX_Free(vertex); } 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(FX_PATHPOINT* pPoints) { float p[4]; int i; x.GetPoints(p); for (i = 0; i < 4; i++) { pPoints[i].m_PointX = p[i]; } y.GetPoints(p); for (i = 0; i < 4; i++) { pPoints[i].m_PointY = p[i]; } } void GetPointsReverse(FX_PATHPOINT* pPoints) { float p[4]; int i; x.GetPointsReverse(p); for (i = 0; i < 4; i++) { pPoints[i].m_PointX = p[i]; } y.GetPointsReverse(p); for (i = 0; i < 4; i++) { pPoints[i].m_PointY = p[i]; } } float Distance() { return x.Distance() + y.Distance(); } }; static int _BiInterpol(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() { FXSYS_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] = _BiInterpol(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) { int max, diff; max = FXSYS_abs(comp[0] - o.comp[0]); diff = FXSYS_abs(comp[1] - o.comp[1]); if (max < diff) { max = diff; } diff = FXSYS_abs(comp[2] - o.comp[2]); if (max < diff) { max = diff; } return max; } }; 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) { FX_BOOL bSmall = C1.Distance() < 2 && C2.Distance() < 2 && D1.Distance() < 2 && D2.Distance() < 2; Coon_Color div_colors[4]; int d_bottom, d_left, d_top, d_right; 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]); } #define COONCOLOR_THRESHOLD 4 if (bSmall || (d_bottom < COONCOLOR_THRESHOLD && d_left < COONCOLOR_THRESHOLD && d_top < COONCOLOR_THRESHOLD && d_right < COONCOLOR_THRESHOLD)) { FX_PATHPOINT* pPoints = path.GetPoints(); C1.GetPoints(pPoints); 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, NULL, NULL, 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()); } } } }; bool _CheckCoonTensorPara(const CPDF_MeshStream& stream) { bool bCoorBits = (stream.m_nCoordBits == 1 || stream.m_nCoordBits == 2 || stream.m_nCoordBits == 4 || stream.m_nCoordBits == 8 || stream.m_nCoordBits == 12 || stream.m_nCoordBits == 16 || stream.m_nCoordBits == 24 || stream.m_nCoordBits == 32); bool bCompBits = (stream.m_nCompBits == 1 || stream.m_nCompBits == 2 || stream.m_nCompBits == 4 || stream.m_nCompBits == 8 || stream.m_nCompBits == 12 || stream.m_nCompBits == 16); bool bFlagBits = (stream.m_nFlagBits == 2 || stream.m_nFlagBits == 4 || stream.m_nFlagBits == 8); return bCoorBits && bCompBits && bFlagBits; } static void DrawCoonPatchMeshes(FX_BOOL bTensor, CFX_DIBitmap* pBitmap, CFX_Matrix* pObject2Bitmap, CPDF_Stream* pShadingStream, CPDF_Function** pFuncs, int nFuncs, CPDF_ColorSpace* pCS, int fill_mode, int alpha) { ASSERT(pBitmap->GetFormat() == FXDIB_Argb); CFX_FxgeDevice device; device.Attach(pBitmap); CPDF_MeshStream stream; if (!stream.Load(pShadingStream, pFuncs, nFuncs, pCS)) return; if (!_CheckCoonTensorPara(stream)) return; CPDF_PatchDrawer patch; patch.alpha = alpha; patch.pDevice = &device; patch.fill_mode = fill_mode; patch.path.SetPointCount(13); FX_PATHPOINT* pPoints = patch.path.GetPoints(); pPoints[0].m_Flag = FXPT_MOVETO; for (int i = 1; i < 13; i++) { pPoints[i].m_Flag = FXPT_BEZIERTO; } CFX_PointF coords[16]; int point_count = bTensor ? 16 : 12; while (!stream.m_BitStream.IsEOF()) { FX_DWORD flag = stream.GetFlag(); 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]; } FXSYS_memcpy(coords, tempCoords, sizeof(tempCoords)); Coon_Color tempColors[2]; tempColors[0] = patch.patch_colors[flag]; tempColors[1] = patch.patch_colors[(flag + 1) % 4]; FXSYS_memcpy(patch.patch_colors, tempColors, sizeof(Coon_Color) * 2); } for (i = iStartPoint; i < point_count; i++) { stream.GetCoords(coords[i].x, coords[i].y); pObject2Bitmap->Transform(coords[i].x, coords[i].y); } for (i = iStartColor; i < 4; i++) { FX_FLOAT r = 0.0f, g = 0.0f, b = 0.0f; stream.GetColor(r, g, b); 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 >= (FX_FLOAT)pBitmap->GetWidth() || bbox.top <= 0 || bbox.bottom >= (FX_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); } } void CPDF_RenderStatus::DrawShading(CPDF_ShadingPattern* pPattern, CFX_Matrix* pMatrix, FX_RECT& clip_rect, int alpha, FX_BOOL bAlphaMode) { CPDF_Function** pFuncs = pPattern->m_pFunctions; int nFuncs = pPattern->m_nFuncs; CPDF_Dictionary* pDict = pPattern->m_pShadingObj->GetDict(); CPDF_ColorSpace* pColorSpace = pPattern->m_pCS; if (!pColorSpace) { return; } FX_ARGB background = 0; if (!pPattern->m_bShadingObj && pPattern->m_pShadingObj->GetDict()->KeyExist("Background")) { CPDF_Array* pBackColor = pPattern->m_pShadingObj->GetDict()->GetArrayBy("Background"); if (pBackColor && pBackColor->GetCount() >= pColorSpace->CountComponents()) { CFX_FixedBufGrow comps(pColorSpace->CountComponents()); for (int i = 0; i < pColorSpace->CountComponents(); i++) { comps[i] = pBackColor->GetNumberAt(i); } FX_FLOAT R = 0.0f, G = 0.0f, 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->GetRectBy("BBox"); rect.Transform(pMatrix); clip_rect.Intersect(rect.GetOutterRect()); } if (m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_SHADING && m_pDevice->GetDeviceDriver()->DrawShading(pPattern, pMatrix, 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_DIBitmap* pBitmap = buffer.GetBitmap(); if (!pBitmap->GetBuffer()) { return; } pBitmap->Clear(background); int fill_mode = m_Options.m_Flags; switch (pPattern->m_ShadingType) { case kInvalidShading: case kMaxShading: return; case kFunctionBasedShading: DrawFuncShading(pBitmap, &FinalMatrix, pDict, pFuncs, nFuncs, pColorSpace, alpha); break; case kAxialShading: DrawAxialShading(pBitmap, &FinalMatrix, pDict, pFuncs, nFuncs, pColorSpace, alpha); break; case kRadialShading: DrawRadialShading(pBitmap, &FinalMatrix, pDict, pFuncs, nFuncs, pColorSpace, alpha); break; case kFreeFormGouraudTriangleMeshShading: { DrawFreeGouraudShading(pBitmap, &FinalMatrix, ToStream(pPattern->m_pShadingObj), pFuncs, nFuncs, pColorSpace, alpha); } break; case kLatticeFormGouraudTriangleMeshShading: { DrawLatticeGouraudShading(pBitmap, &FinalMatrix, ToStream(pPattern->m_pShadingObj), pFuncs, nFuncs, pColorSpace, alpha); } break; case kCoonsPatchMeshShading: case kTensorProductPatchMeshShading: { DrawCoonPatchMeshes( pPattern->m_ShadingType == kTensorProductPatchMeshShading, pBitmap, &FinalMatrix, ToStream(pPattern->m_pShadingObj), pFuncs, nFuncs, 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, FX_BOOL bStroke) { if (!pattern->Load()) { return; } m_pDevice->SaveState(); if (pPageObj->IsPath()) { if (!SelectClipPath(pPageObj->AsPath(), pObj2Device, bStroke)) { m_pDevice->RestoreState(); return; } } else if (pPageObj->IsImage()) { m_pDevice->SetClip_Rect(pPageObj->GetBBox(pObj2Device)); } else { return; } FX_RECT rect; if (GetObjectClippedRect(pPageObj, pObj2Device, FALSE, rect)) { m_pDevice->RestoreState(); return; } CFX_Matrix matrix = pattern->m_Pattern2Form; matrix.Concat(*pObj2Device); GetScaledMatrix(matrix); int alpha = pPageObj->m_GeneralState.GetAlpha(bStroke); DrawShading(pattern, &matrix, rect, alpha, m_Options.m_ColorMode == RENDER_COLOR_ALPHA); m_pDevice->RestoreState(); } FX_BOOL 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 TRUE; } CFX_Matrix matrix = pShadingObj->m_Matrix; matrix.Concat(*pObj2Device); DrawShading(pShadingObj->m_pShading, &matrix, rect, pShadingObj->m_GeneralState.GetAlpha(FALSE), m_Options.m_ColorMode == RENDER_COLOR_ALPHA); return TRUE; } static CFX_DIBitmap* DrawPatternBitmap(CPDF_Document* pDoc, CPDF_PageRenderCache* pCache, CPDF_TilingPattern* pPattern, const CFX_Matrix* pObject2Device, int width, int height, int flags) { CFX_DIBitmap* pBitmap = new CFX_DIBitmap; if (!pBitmap->Create(width, height, pPattern->m_bColored ? FXDIB_Argb : FXDIB_8bppMask)) { delete pBitmap; return NULL; } CFX_FxgeDevice bitmap_device; bitmap_device.Attach(pBitmap); pBitmap->Clear(0); CFX_FloatRect cell_bbox = pPattern->m_BBox; pPattern->m_Pattern2Form.TransformRect(cell_bbox); pObject2Device->TransformRect(cell_bbox); CFX_FloatRect bitmap_rect(0.0f, 0.0f, (FX_FLOAT)width, (FX_FLOAT)height); CFX_Matrix mtAdjust; mtAdjust.MatchRect(bitmap_rect, cell_bbox); CFX_Matrix mtPattern2Bitmap = *pObject2Device; mtPattern2Bitmap.Concat(mtAdjust); CPDF_RenderOptions options; if (!pPattern->m_bColored) { options.m_ColorMode = RENDER_COLOR_ALPHA; } flags |= RENDER_FORCE_HALFTONE; options.m_Flags = flags; CPDF_RenderContext context(pDoc, pCache); context.AppendLayer(pPattern->m_pForm, &mtPattern2Bitmap); context.Render(&bitmap_device, &options, nullptr); return pBitmap; } void CPDF_RenderStatus::DrawTilingPattern(CPDF_TilingPattern* pPattern, const CPDF_PageObject* pPageObj, const CFX_Matrix* pObj2Device, FX_BOOL bStroke) { if (!pPattern->Load()) { return; } m_pDevice->SaveState(); if (pPageObj->IsPath()) { if (!SelectClipPath(pPageObj->AsPath(), pObj2Device, bStroke)) { m_pDevice->RestoreState(); 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()) { m_pDevice->RestoreState(); return; } CFX_Matrix dCTM = m_pDevice->GetCTM(); FX_FLOAT sa = FXSYS_fabs(dCTM.a); FX_FLOAT sd = FXSYS_fabs(dCTM.d); clip_box.right = clip_box.left + (int32_t)FXSYS_ceil(clip_box.Width() * sa); clip_box.bottom = clip_box.top + (int32_t)FXSYS_ceil(clip_box.Height() * sd); CFX_Matrix mtPattern2Device = pPattern->m_Pattern2Form; mtPattern2Device.Concat(*pObj2Device); GetScaledMatrix(mtPattern2Device); FX_BOOL bAligned = FALSE; if (pPattern->m_BBox.left == 0 && pPattern->m_BBox.bottom == 0 && pPattern->m_BBox.right == pPattern->m_XStep && pPattern->m_BBox.top == pPattern->m_YStep && (mtPattern2Device.IsScaled() || mtPattern2Device.Is90Rotated())) { bAligned = TRUE; } CFX_FloatRect cell_bbox = pPattern->m_BBox; mtPattern2Device.TransformRect(cell_bbox); int width = (int)FXSYS_ceil(cell_bbox.Width()); int height = (int)FXSYS_ceil(cell_bbox.Height()); if (width == 0) { width = 1; } if (height == 0) { height = 1; } int min_col, max_col, min_row, max_row; CFX_Matrix mtDevice2Pattern; mtDevice2Pattern.SetReverse(mtPattern2Device); CFX_FloatRect clip_box_p(clip_box); clip_box_p.Transform(&mtDevice2Pattern); min_col = (int)FXSYS_ceil((clip_box_p.left - pPattern->m_BBox.right) / pPattern->m_XStep); max_col = (int)FXSYS_floor((clip_box_p.right - pPattern->m_BBox.left) / pPattern->m_XStep); min_row = (int)FXSYS_ceil((clip_box_p.bottom - pPattern->m_BBox.top) / pPattern->m_YStep); max_row = (int)FXSYS_floor((clip_box_p.top - pPattern->m_BBox.bottom) / pPattern->m_YStep); if (width > clip_box.Width() || height > clip_box.Height() || width * height > clip_box.Width() * clip_box.Height()) { CPDF_GraphicStates* pStates = NULL; if (!pPattern->m_bColored) { pStates = CloneObjStates(pPageObj, bStroke); } CPDF_Dictionary* pFormResource = NULL; if (pPattern->m_pForm->m_pFormDict) { pFormResource = pPattern->m_pForm->m_pFormDict->GetDictBy("Resources"); } for (int col = min_col; col <= max_col; col++) for (int row = min_row; row <= max_row; row++) { FX_FLOAT orig_x, orig_y; orig_x = col * pPattern->m_XStep; orig_y = row * pPattern->m_YStep; mtPattern2Device.Transform(orig_x, orig_y); CFX_Matrix matrix = *pObj2Device; matrix.Translate(orig_x - mtPattern2Device.e, orig_y - mtPattern2Device.f); m_pDevice->SaveState(); CPDF_RenderStatus status; status.Initialize(m_pContext, m_pDevice, NULL, NULL, this, pStates, &m_Options, pPattern->m_pForm->m_Transparency, m_bDropObjects, pFormResource); status.RenderObjectList(pPattern->m_pForm, &matrix); m_pDevice->RestoreState(); } m_pDevice->RestoreState(); delete pStates; 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--; } } FX_FLOAT left_offset = cell_bbox.left - mtPattern2Device.e; FX_FLOAT top_offset = cell_bbox.bottom - mtPattern2Device.f; CFX_DIBitmap* pPatternBitmap = NULL; if (width * height < 16) { CFX_DIBitmap* pEnlargedBitmap = DrawPatternBitmap(m_pContext->GetDocument(), m_pContext->GetPageCache(), pPattern, pObj2Device, 8, 8, m_Options.m_Flags); pPatternBitmap = pEnlargedBitmap->StretchTo(width, height); delete pEnlargedBitmap; } else { pPatternBitmap = DrawPatternBitmap( m_pContext->GetDocument(), m_pContext->GetPageCache(), pPattern, pObj2Device, width, height, m_Options.m_Flags); } if (!pPatternBitmap) { m_pDevice->RestoreState(); 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; CFX_DIBitmap screen; if (!screen.Create(clip_width, clip_height, FXDIB_Argb)) { return; } screen.Clear(0); FX_DWORD* src_buf = (FX_DWORD*)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 { FX_FLOAT orig_x = col * pPattern->m_XStep; FX_FLOAT orig_y = row * pPattern->m_YStep; mtPattern2Device.Transform(orig_x, orig_y); start_x = FXSYS_round(orig_x + left_offset) - clip_box.left; start_y = FXSYS_round(orig_y + top_offset) - clip_box.top; } if (width == 1 && height == 1) { if (start_x < 0 || start_x >= clip_box.Width() || start_y < 0 || start_y >= clip_box.Height()) { continue; } FX_DWORD* dest_buf = (FX_DWORD*)(screen.GetBuffer() + screen.GetPitch() * start_y + start_x * 4); if (pPattern->m_bColored) { *dest_buf = *src_buf; } else { *dest_buf = (*(uint8_t*)src_buf << 24) | (fill_argb & 0xffffff); } } else { if (pPattern->m_bColored) { screen.CompositeBitmap(start_x, start_y, width, height, pPatternBitmap, 0, 0); } else { screen.CompositeMask(start_x, start_y, width, height, pPatternBitmap, fill_argb, 0, 0); } } } } CompositeDIBitmap(&screen, clip_box.left, clip_box.top, 0, 255, FXDIB_BLEND_NORMAL, FALSE); m_pDevice->RestoreState(); delete pPatternBitmap; } void CPDF_RenderStatus::DrawPathWithPattern(const CPDF_PathObject* pPathObj, const CFX_Matrix* pObj2Device, CPDF_Color* pColor, FX_BOOL bStroke) { CPDF_Pattern* pattern = pColor->GetPattern(); if (!pattern) { return; } if (pattern->m_PatternType == CPDF_Pattern::TILING) { DrawTilingPattern(static_cast(pattern), pPathObj, pObj2Device, bStroke); } else { DrawShadingPattern(static_cast(pattern), pPathObj, pObj2Device, bStroke); } } void CPDF_RenderStatus::ProcessPathPattern(const CPDF_PathObject* pPathObj, const CFX_Matrix* pObj2Device, int& filltype, FX_BOOL& bStroke) { if (filltype) { CPDF_Color& FillColor = *pPathObj->m_ColorState.GetFillColor(); if (FillColor.m_pCS && FillColor.m_pCS->GetFamily() == PDFCS_PATTERN) { DrawPathWithPattern(pPathObj, pObj2Device, &FillColor, FALSE); filltype = 0; } } if (bStroke) { CPDF_Color& StrokeColor = *pPathObj->m_ColorState.GetStrokeColor(); if (StrokeColor.m_pCS && StrokeColor.m_pCS->GetFamily() == PDFCS_PATTERN) { DrawPathWithPattern(pPathObj, pObj2Device, &StrokeColor, TRUE); bStroke = FALSE; } } }