diff options
Diffstat (limited to 'core/fpdfapi/fpdf_render/fpdf_render_pattern.cpp')
| -rw-r--r-- | core/fpdfapi/fpdf_render/fpdf_render_pattern.cpp | 1207 |
1 files changed, 1207 insertions, 0 deletions
diff --git a/core/fpdfapi/fpdf_render/fpdf_render_pattern.cpp b/core/fpdfapi/fpdf_render/fpdf_render_pattern.cpp new file mode 100644 index 0000000000..5ad8db1646 --- /dev/null +++ b/core/fpdfapi/fpdf_render/fpdf_render_pattern.cpp @@ -0,0 +1,1207 @@ +// 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/pageint.h" +#include "core/include/fpdfapi/cpdf_array.h" +#include "core/include/fpdfapi/cpdf_dictionary.h" +#include "core/include/fpdfapi/fpdf_pageobj.h" +#include "core/include/fpdfapi/fpdf_render.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<FX_FLOAT, 16> 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<FX_FLOAT, 16> 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<FX_FLOAT, 16> 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<FX_FLOAT, 16> 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()); + } + 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<CPDF_TilingPattern*>(pattern), pPathObj, + pObj2Device, bStroke); + } else { + DrawShadingPattern(static_cast<CPDF_ShadingPattern*>(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; + } + } +} |