#include "document.h"
-
+#include "bezier.h"
#include <cstdio>
+#include <fstream>
+
+#include "stb_truetype.h"
using namespace IPDF;
using namespace std;
+//TODO: Make this work for variable sized Reals
+
// Loads an std::vector<T> of size num_elements from a file.
template<typename T>
static void LoadStructVector(FILE *src_file, size_t num_elems, std::vector<T>& dest)
WriteChunkHeader(file, CT_OBJBOUNDS, m_objects.bounds.size() * sizeof(Rect));
SaveStructVector<Rect>(file, m_objects.bounds);
+ Debug("Object data indices...");
+ WriteChunkHeader(file, CT_OBJINDICES, m_objects.data_indices.size() * sizeof(unsigned));
+ SaveStructVector<unsigned>(file, m_objects.data_indices);
+
+ Debug("Bezier data...");
+ WriteChunkHeader(file, CT_OBJBEZIERS, m_objects.beziers.size() * sizeof(uint8_t));
+ SaveStructVector<Bezier>(file, m_objects.beziers);
+
int err = fclose(file);
if (err != 0)
Fatal("Failed to close file \"%s\" - %s", filename.c_str(), strerror(err));
Debug("Successfully saved %u objects to \"%s\"", ObjectCount(), filename.c_str());
}
+#ifndef QUADTREE_DISABLED
+
+void Document::GenBaseQuadtree()
+{
+ m_quadtree.nodes.push_back(QuadTreeNode{QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QTC_UNKNOWN, 0, ObjectCount()});
+ m_quadtree.root_id = 0;
+ GenQuadChild(0, QTC_TOP_LEFT);
+ GenQuadParent(0, QTC_BOTTOM_RIGHT);
+}
+
+QuadTreeIndex Document::GenQuadChild(QuadTreeIndex parent, QuadTreeNodeChildren type)
+{
+ QuadTreeIndex new_index = m_quadtree.nodes.size();
+ m_quadtree.nodes.push_back(QuadTreeNode{QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, parent, type, 0, 0});
+
+ m_quadtree.nodes[new_index].object_begin = m_objects.bounds.size();
+ for (unsigned i = m_quadtree.nodes[parent].object_begin; i < m_quadtree.nodes[parent].object_end; ++i)
+ {
+ if (ContainedInQuadChild(m_objects.bounds[i], type))
+ {
+ m_objects.bounds.push_back(TransformToQuadChild(m_objects.bounds[i], type));
+ m_objects.types.push_back(m_objects.types[i]);
+ m_objects.data_indices.push_back(m_objects.data_indices[i]);
+ m_count++;
+ }
+ }
+ m_quadtree.nodes[new_index].object_end = m_objects.bounds.size();
+ switch (type)
+ {
+ case QTC_TOP_LEFT:
+ m_quadtree.nodes[parent].top_left = new_index;
+ break;
+ case QTC_TOP_RIGHT:
+ m_quadtree.nodes[parent].top_right = new_index;
+ break;
+ case QTC_BOTTOM_LEFT:
+ m_quadtree.nodes[parent].bottom_left = new_index;
+ break;
+ case QTC_BOTTOM_RIGHT:
+ m_quadtree.nodes[parent].bottom_right = new_index;
+ break;
+ default:
+ Fatal("Tried to add a QuadTree child of invalid type!");
+ }
+ return new_index;
+}
+
+// Reparent a quadtree node, making it the "type" child of a new node.
+QuadTreeIndex Document::GenQuadParent(QuadTreeIndex child, QuadTreeNodeChildren type)
+{
+ QuadTreeIndex new_index = m_quadtree.nodes.size();
+ m_quadtree.nodes.push_back(QuadTreeNode{QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, -1, QTC_UNKNOWN, 0, 0});
+
+ m_quadtree.nodes[new_index].object_begin = m_objects.bounds.size();
+ for (unsigned i = m_quadtree.nodes[child].object_begin; i < m_quadtree.nodes[child].object_end; ++i)
+ {
+ m_objects.bounds.push_back(TransformFromQuadChild(m_objects.bounds[i], type));
+ m_objects.types.push_back(m_objects.types[i]);
+ m_objects.data_indices.push_back(m_objects.data_indices[i]);
+ m_count++;
+ }
+ m_quadtree.nodes[new_index].object_end = m_objects.bounds.size();
+ switch (type)
+ {
+ case QTC_TOP_LEFT:
+ m_quadtree.nodes[new_index].top_left = child;
+ break;
+ case QTC_TOP_RIGHT:
+ m_quadtree.nodes[new_index].top_right = child;
+ break;
+ case QTC_BOTTOM_LEFT:
+ m_quadtree.nodes[new_index].bottom_left = child;
+ break;
+ case QTC_BOTTOM_RIGHT:
+ m_quadtree.nodes[new_index].bottom_right = child;
+ break;
+ default:
+ Fatal("Tried to add a QuadTree child of invalid type!");
+ }
+ return new_index;
+}
+
+#endif
+
void Document::Load(const string & filename)
{
m_objects.bounds.clear();
Debug("Object bounds...");
LoadStructVector<Rect>(file, chunk_size/sizeof(Rect), m_objects.bounds);
break;
+ case CT_OBJINDICES:
+ Debug("Object data indices...");
+ LoadStructVector<unsigned>(file, chunk_size/sizeof(unsigned), m_objects.data_indices);
+ break;
+ case CT_OBJBEZIERS:
+ Debug("Bezier data...");
+ LoadStructVector<Bezier>(file, chunk_size/sizeof(Bezier), m_objects.beziers);
+ break;
}
}
Debug("Successfully loaded %u objects from \"%s\"", ObjectCount(), filename.c_str());
+#ifndef QUADTREE_DISABLED
+ if (m_quadtree.root_id == QUADTREE_EMPTY)
+ {
+ GenBaseQuadtree();
+ }
+#endif
}
-void Document::Add(ObjectType type, const Rect & bounds)
+void Document::Add(ObjectType type, const Rect & bounds, unsigned data_index)
{
m_objects.types.push_back(type);
m_objects.bounds.push_back(bounds);
- m_count++;
+ m_objects.data_indices.push_back(data_index);
+ ++m_count; // Why can't we just use the size of types or something?
}
+unsigned Document::AddBezierData(const Bezier & bezier)
+{
+ m_objects.beziers.push_back(bezier);
+ return m_objects.beziers.size()-1;
+}
+
+
void Document::DebugDumpObjects()
{
Debug("Objects for Document %p are:", this);
bool Document::operator==(const Document & equ) const
{
- return (ObjectCount() == equ.ObjectCount() && memcmp(m_objects.bounds.data(), equ.m_objects.bounds.data(), ObjectCount() * sizeof(Rect)) == 0);
+ return (ObjectCount() == equ.ObjectCount()
+ && memcmp(m_objects.bounds.data(), equ.m_objects.bounds.data(), ObjectCount() * sizeof(Rect)) == 0
+ && memcmp(m_objects.data_indices.data(), equ.m_objects.data_indices.data(), ObjectCount() * sizeof(unsigned)) == 0
+ && memcmp(m_objects.beziers.data(), equ.m_objects.beziers.data(), m_objects.beziers.size() * sizeof(Bezier)) == 0);
+}
+
+
+#include "../contrib/pugixml-1.4/src/pugixml.hpp"
+#include "../contrib/pugixml-1.4/src/pugixml.cpp"
+
+/**
+ * Load an SVG into a rectangle
+ */
+void Document::LoadSVG(const string & filename, const Rect & bounds)
+{
+ using namespace pugi;
+
+ xml_document doc_xml;
+ ifstream input(filename.c_str(), ios_base::in);
+ xml_parse_result result = doc_xml.load(input);
+
+ if (!result)
+ Fatal("Couldn't load \"%s\" - %s", filename.c_str(), result.description());
+
+ Debug("Loaded XML - %s", result.description());
+
+ input.close();
+
+ // Combine all SVG tags into one thing because lazy
+ for (xml_node svg : doc_xml.children("svg"))
+ {
+ Real width = svg.attribute("width").as_float() * bounds.w;
+ Real height = svg.attribute("width").as_float() * bounds.h;
+
+
+ // Rectangles
+ Real coords[4];
+ const char * attrib_names[] = {"x", "y", "width", "height"};
+ for (pugi::xml_node rect : svg.children("rect"))
+ {
+ for (size_t i = 0; i < 4; ++i)
+ coords[i] = rect.attribute(attrib_names[i]).as_float();
+
+ bool outline = !(rect.attribute("fill"));
+ Add(outline?RECT_OUTLINE:RECT_FILLED, Rect(coords[0]/width + bounds.x, coords[1]/height + bounds.y, coords[2]/width, coords[3]/height),0);
+ Debug("Added rectangle");
+ }
+
+ // Circles
+ for (pugi::xml_node circle : svg.children("circle"))
+ {
+ Real cx = circle.attribute("cx").as_float();
+ Real cy = circle.attribute("cy").as_float();
+ Real r = circle.attribute("r").as_float();
+
+ Real x = (cx - r)/width + bounds.x;
+ Real y = (cy - r)/height + bounds.y;
+ Real w = 2*r/width;
+ Real h = 2*r/height;
+
+ Rect rect(x,y,w,h);
+ Add(CIRCLE_FILLED, rect,0);
+ Debug("Added Circle %s", rect.Str().c_str());
+
+ }
+
+ // paths
+ for (pugi::xml_node path : svg.children("path"))
+ {
+
+ string d = path.attribute("d").as_string();
+ Debug("Path data attribute is \"%s\"", d.c_str());
+ AddPathFromString(d, Rect(bounds.x,bounds.y,width,height));
+
+ }
+ }
+
+ //Fatal("Done");
+
+
+
+}
+
+// Behold my amazing tokenizing abilities
+static string & GetToken(const string & d, string & token, unsigned & i)
+{
+ token.clear();
+ while (i < d.size() && iswspace(d[i]))
+ {
+ ++i;
+ }
+
+ while (i < d.size())
+ {
+ if (d[i] == ',' || (isalpha(d[i]) && d[i] != 'e') || iswspace(d[i]))
+ {
+ if (token.size() == 0 && !iswspace(d[i]))
+ {
+ token += d[i++];
+ }
+ break;
+ }
+ token += d[i++];
+ }
+ Debug("Got token \"%s\"", token.c_str());
+ return token;
+}
+
+
+// Fear the wrath of the tokenizing svg data
+// Seriously this isn't really very DOM-like at all is it?
+void Document::AddPathFromString(const string & d, const Rect & bounds)
+{
+ Real x[4] = {0,0,0,0};
+ Real y[4] = {0,0,0,0};
+
+ string token("");
+ string command("m");
+
+ Real x0(0);
+ Real y0(0);
+
+ unsigned i = 0;
+ unsigned prev_i = 0;
+
+ bool start = false;
+
+ while (i < d.size() && GetToken(d, token, i).size() > 0)
+ {
+ if (isalpha(token[0]))
+ command = token;
+ else
+ {
+ i = prev_i; // hax
+ if(command == "")
+ command = "L";
+ }
+
+ bool relative = islower(command[0]);
+
+ if (command == "m" || command == "M")
+ {
+ Debug("Construct moveto command");
+ Real dx = strtod(GetToken(d,token,i).c_str(),NULL) / bounds.w;
+ assert(GetToken(d,token,i) == ",");
+ Real dy = strtod(GetToken(d,token,i).c_str(),NULL) / bounds.h;
+
+ x[0] = (relative) ? x[0] + dx : dx;
+ y[0] = (relative) ? y[0] + dy : dy;
+
+
+
+ Debug("mmoveto %f,%f", Float(x[0]),Float(y[0]));
+ command = (command == "m") ? "l" : "L";
+ }
+ else if (command == "c" || command == "C" || command == "q" || command == "Q")
+ {
+ Debug("Construct curveto command");
+ Real dx = strtod(GetToken(d,token,i).c_str(),NULL)/bounds.w;
+ assert(GetToken(d,token,i) == ",");
+ Real dy = strtod(GetToken(d,token,i).c_str(),NULL)/bounds.h;
+
+ x[1] = (relative) ? x[0] + dx : dx;
+ y[1] = (relative) ? y[0] + dy : dy;
+
+ dx = strtod(GetToken(d,token,i).c_str(),NULL) / bounds.w;
+ assert(GetToken(d,token,i) == ",");
+ dy = strtod(GetToken(d,token,i).c_str(),NULL) / bounds.h;
+
+ x[2] = (relative) ? x[0] + dx : dx;
+ y[2] = (relative) ? y[0] + dy : dy;
+
+ if (command != "q" && command != "Q")
+ {
+ dx = strtod(GetToken(d,token,i).c_str(),NULL) / bounds.w;
+ assert(GetToken(d,token,i) == ",");
+ dy = strtod(GetToken(d,token,i).c_str(),NULL) / bounds.h;
+ x[3] = (relative) ? x[0] + dx : dx;
+ y[3] = (relative) ? y[0] + dy : dy;
+ }
+ else
+ {
+ x[3] = x[2];
+ y[3] = y[2];
+ Real old_x1(x[1]), old_y1(y[1]);
+ x[1] = x[0] + Real(2) * (old_x1 - x[0])/ Real(3);
+ y[1] = y[0] + Real(2) * (old_y1 - y[0])/ Real(3);
+ x[2] = x[3] + Real(2) * (old_x1 - x[3])/ Real(3);
+ y[2] = y[3] + Real(2) * (old_y1 - y[3])/ Real(3);
+ }
+
+ unsigned index = AddBezierData(Bezier(x[0],y[0],x[1],y[1],x[2],y[2],x[3],y[3]));
+ Add(BEZIER,Rect(0,0,1,1),index);
+
+
+ Debug("[%u] curveto %f,%f %f,%f %f,%f", index, Float(x[1]),Float(y[1]),Float(x[2]),Float(y[2]),Float(x[3]),Float(y[3]));
+
+ x[0] = x[3];
+ y[0] = y[3];
+
+
+ }
+ else if (command == "l" || command == "L")
+ {
+ Debug("Construct lineto command");
+
+ Real dx = strtod(GetToken(d,token,i).c_str(),NULL) / bounds.w;
+ assert(GetToken(d,token,i) == ",");
+ Real dy = strtod(GetToken(d,token,i).c_str(),NULL) / bounds.h;
+
+ x[1] = (relative) ? x[0] + dx : dx;
+ y[1] = (relative) ? y[0] + dy : dy;
+
+ x[2] = x[1];
+ y[2] = y[1];
+
+ x[3] = x[1];
+ y[3] = y[1];
+
+ unsigned index = AddBezierData(Bezier(x[0],y[0],x[1],y[1],x[2],y[2],x[3],y[3]));
+ Add(BEZIER,Rect(0,0,1,1),index);
+
+ Debug("[%u] lineto %f,%f %f,%f", index, Float(x[0]),Float(y[0]),Float(x[1]),Float(y[1]));
+
+ x[0] = x[3];
+ y[0] = y[3];
+
+ }
+ else if (command == "z" || command == "Z")
+ {
+ Debug("Construct returnto command");
+ x[1] = x0;
+ y[1] = y0;
+ x[2] = x0;
+ y[2] = y0;
+ x[3] = x0;
+ y[3] = y0;
+
+ unsigned index = AddBezierData(Bezier(x[0],y[0],x[1],y[1],x[2],y[2],x[3],y[3]));
+ Add(BEZIER,Rect(0,0,1,1),index);
+
+ Debug("[%u] returnto %f,%f %f,%f", index, Float(x[0]),Float(y[0]),Float(x[1]),Float(y[1]));
+
+ x[0] = x[3];
+ y[0] = y[3];
+ command = "m";
+ }
+ else
+ {
+ Warn("Unrecognised command \"%s\", set to \"m\"", command.c_str());
+ command = "m";
+ }
+
+ if (!start)
+ {
+ x0 = x[0];
+ y0 = y[0];
+ start = true;
+ }
+ prev_i = i;
+ }
+}
+
+void Document::AddFontGlyphAtPoint(stbtt_fontinfo *font, int character, Real scale, Real x, Real y)
+{
+ int glyph_index = stbtt_FindGlyphIndex(font, character);
+
+ // Check if there is actully a glyph to render.
+ if (stbtt_IsGlyphEmpty(font, glyph_index))
+ {
+ return;
+ }
+
+ stbtt_vertex *instructions;
+ int num_instructions = stbtt_GetGlyphShape(font, glyph_index, &instructions);
+
+ Real current_x(0), current_y(0);
+
+ for (int i = 0; i < num_instructions; ++i)
+ {
+ // TTF uses 16-bit signed ints for coordinates:
+ // with the y-axis inverted compared to us.
+ // Convert and scale any data.
+ Real inst_x = Real(instructions[i].x)*scale;
+ Real inst_y = Real(instructions[i].y)*-scale;
+ Real inst_cx = Real(instructions[i].cx)*scale;
+ Real inst_cy = Real(instructions[i].cy)*-scale;
+ Real old_x(current_x), old_y(current_y);
+ current_x = inst_x;
+ current_y = inst_y;
+ unsigned bezier_index;
+ switch(instructions[i].type)
+ {
+ // Move To
+ case STBTT_vmove:
+ break;
+ // Line To
+ case STBTT_vline:
+ bezier_index = AddBezierData(Bezier(old_x + x, old_y + y, old_x + x, old_y + y, current_x + x, current_y + y, current_x + x, current_y + y));
+ Add(BEZIER,Rect(0,0,1,1),bezier_index);
+ break;
+ // Quadratic Bezier To:
+ case STBTT_vcurve:
+ // Quadratic -> Cubic:
+ // - Endpoints are the same.
+ // - cubic1 = quad0+(2/3)*(quad1-quad0)
+ // - cubic2 = quad2+(2/3)*(quad1-quad2)
+ bezier_index = AddBezierData(Bezier(old_x + x, old_y + y, old_x + Real(2)*(inst_cx-old_x)/Real(3) + x, old_y + Real(2)*(inst_cy-old_y)/Real(3) + y,
+ current_x + Real(2)*(inst_cx-current_x)/Real(3) + x, current_y + Real(2)*(inst_cy-current_y)/Real(3) + y, current_x + x, current_y + y));
+ Add(BEZIER,Rect(0,0,1,1),bezier_index);
+ break;
+ }
+ }
+
+ stbtt_FreeShape(font, instructions);
}
git.ucc.asn.au / ipdf / code.git / blobdiff
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