Drawing parser should be done. Untested.

Originally committed to SVN as r527.
This commit is contained in:
Niels Martin Hansen 2006-08-24 01:23:12 +00:00
parent 4b8d7b4dc8
commit 0fa1abf273
4 changed files with 218 additions and 14 deletions

194
p-designer/ass_drawing.cpp Normal file
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@ -0,0 +1,194 @@
// Copyright (c) 2006, Niels Martin Hansen
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// * Neither the name of the Aegisub Group nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
#include "ass_drawing.h"
#include <ctype.h>
// Point Four on the roadmap: code the ToString function
wxString AssDrawing::ToString()
{
return wxString(_T(""));
}
// Point Two on the roadmap: code the FromString function
// "Steal" some ideas from RTS.cpp :P
// Attempt to read a point from string src.
// On success: Add point to target, "eat" point from src, increase where by chars eaten, return true.
// Assume first char is a non-space
static bool ReadPoint(wxString &src, int &where, std::vector<AssDrawingPoint> &target)
{
AssDrawingPoint p;
int i = 0;
bool isneg = false;
// Check for negativity
if (src[i] == '+') isneg = false, i++;
if (src[i] == '-') isneg = true, i++;
// Faster exit for non-digit things
if (!isdigit(src[i])) return false;
// This loop should terminate even if it hits end of string, since isdigit('\0')==false
while (isdigit(src[i])) i++;
p.x = src.Mid(0, i).ToLong();
if (isneg) p.x = -p.x;
// Error checking
if (!isspace(src[i])) return false;
// Find start of next number
while (isspace(src[i])) i++;
// Get second number
int j = i;
isneg = false;
if (src[j] == '+') isneg = false, j++;
if (src[j] == '-') isneg = true, j++;
while (isdigit(src[j])) j++;
p.y = src.Mid(j, j-i).ToLong();
if (isneg) p.y = -p.y;
if (!isspace(src[j])) return false;
while (isspace(src[j])) j++;
// Finish off
src = src.Mid(j);
target.push_back(p);
where += j;
return true;
}
int AssDrawing::FromString(wxString src)
{
data.clear();
// Counter for number of chars eaten
int where = 0;
src.Trim(false);
while (src.Len() > 0) {
AssDrawingSegment seg;
int i = 0;
// Next character should be a letter, read it
switch (src[i]) {
case 'm':
seg.type = SEGMENT_MOVE;
break;
case 'n':
seg.type = SEGMENT_MOVE_NOCLOSE;
break;
case 'l':
seg.type = SEGMENT_LINE;
break;
case 'b':
seg.type = SEGMENT_BEZIER;
break;
case 's':
seg.type = SEGMENT_BSPLINE;
break;
case 'p':
seg.type = SEGMENT_BSPLINE_EXTEND;
break;
case 'c':
seg.type = SEGMENT_BSPLINE_CLOSE;
goto skippoints;
default:
// something unknown, stop parsing
return where+1;
}
where++, i++;
while (isspace(src[i])) where++, i++;
src = src.Mid(i);
while (ReadPoint(src, where, seg.points);
skippoints:
data.push_back(seg);
}
return 0;
}
// These might be a bit redundant... save them for last
void AssDrawing::Collapse()
{
// TODO
}
void AssDrawing::Expand()
{
// TODO
}
// I suppose Rescale is just a matter of calculating the new scale, calling Stretch and setting the scale field
void AssDrawing::Rescale(int new_scale)
{
// TODO
}
void AssDrawing::Stretch(float factor)
{
// TODO
}
// A note on the following functions:
// According to VSFilter (last time I checked), the width and height of a drawing are calculated just by looking
// at the min and max X and Y values that appear in the drawing string. This is technically wrong (because of
// splines, those do funny things) but better do as the Romans do.
AssDrawingPoint AssDrawing::GetMinXY()
{
// TODO
return AssDrawingPoint(0, 0);
}
AssDrawingPoint AssDrawing::GetMaxXY()
{
// TODO
return AssDrawingPoint(0, 0);
}
AssDrawingPoint AssDrawing::GetExtents()
{
// TODO
return AssDrawingPoint(0, 0);
}
AssDrawingPoint AssDrawing::GetCenterXY()
{
// TODO
return AssDrawingPoint(0, 0);
}

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@ -35,18 +35,19 @@
#include <wx/string.h>
enum AssDrawingSegmentType {
SEGMENT_MOVE, // m <x> <y>
SEGMENT_MOVE_NOCLOSE, // n <x> <y>
SEGMENT_LINE, // l <x> <y>
SEGMENT_BEZIER, // b <x1> <y1> <x2> <y2> <x3> <y3>
SEGMENT_SPLINE, // s <x1> <y2> <x2> <y2> <x3> <y3> [... <xN> <yN>]
SEGMENT_SPLINE_EXTEND, // p <x> <y>
SEGMENT_SPLINE_CLOSE, // c
// thought: maybe join the three last into one?
SEGMENT_MOVE, // m <x> <y>
SEGMENT_MOVE_NOCLOSE, // n <x> <y>
SEGMENT_LINE, // l <x> <y>
SEGMENT_BEZIER, // b <x1> <y1> <x2> <y2> <x3> <y3>
SEGMENT_BSPLINE, // s <x1> <y2> <x2> <y2> <x3> <y3> [... <xN> <yN>]
SEGMENT_BSPLINE_EXTEND, // p <x> <y>
SEGMENT_BSPLINE_CLOSE, // c
// thought: maybe join the three last into one? (gabest doesn't)
};
struct AssDrawingPoint {
int x, y;
AssDrawingPoint(int _x, int _y) { x = _x; y = _y; }
};
struct AssDrawingSegment {
@ -59,13 +60,18 @@ struct AssDrawing {
std::vector<AssDrawingSegment> data;
wxString ToString(); // stupid conversion to string, doesn't try to shorten things out
int FromString(wxString &src); // returns 0 on success, index+1 of offending character on fail
int FromString(wxString src); // returns 0 on success, index+1 of offending character on fail
void Collapse(); // try to join as many segments together as possible, without affecting the actual shape (eg. join "l 1 2 l 3 4" into "l 1 2 3 4")
void Expand(); // split into as many segments as possible, without creating any meaningless ones, such as null-moves (ie. expand "l 1 2 3 4" into "l 1 2 l 3 4")
void Rescale(int new_scale); // change the scale value, stretching the drawing to match the new one
void Stretch(float factor); // up/down scale the drawing by a factor
AssDrawingPoint GetMinXY(); // get the lowest x and y coordinates present
AssDrawingPoint GetMaxXY(); // get the highest x and y coordinates present
AssDrawingPoint GetExtents(); // get the extents of the drawing as seen by VSFilter
AssDrawingPoint GetCenterXY(); // get the "center" of the drawing (as seen by VSFilter)
};
#endif

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@ -15,11 +15,11 @@
OutputDirectory="Debug"
IntermediateDirectory="Debug"
ConfigurationType="1"
CharacterSet="2">
CharacterSet="1">
<Tool
Name="VCCLCompilerTool"
Optimization="0"
PreprocessorDefinitions="WIN32;_DEBUG;_WINDOWS"
PreprocessorDefinitions="WIN32;_DEBUG;_WINDOWS;UNICODE"
MinimalRebuild="TRUE"
BasicRuntimeChecks="3"
RuntimeLibrary="5"
@ -31,7 +31,7 @@
Name="VCCustomBuildTool"/>
<Tool
Name="VCLinkerTool"
OutputFile="$(OutDir)/p-designer.exe"
OutputFile="../bin/p-designer-debug.exe"
LinkIncremental="2"
GenerateDebugInformation="TRUE"
ProgramDatabaseFile="$(OutDir)/p-designer.pdb"
@ -63,7 +63,7 @@
OutputDirectory="Release"
IntermediateDirectory="Release"
ConfigurationType="1"
CharacterSet="2">
CharacterSet="1">
<Tool
Name="VCCLCompilerTool"
PreprocessorDefinitions="WIN32;NDEBUG;_WINDOWS"
@ -76,7 +76,7 @@
Name="VCCustomBuildTool"/>
<Tool
Name="VCLinkerTool"
OutputFile="$(OutDir)/p-designer.exe"
OutputFile="../bin/p-designer.exe"
LinkIncremental="1"
GenerateDebugInformation="TRUE"
SubSystem="2"
@ -112,6 +112,9 @@
Name="Source Files"
Filter="cpp;c;cxx;def;odl;idl;hpj;bat;asm;asmx"
UniqueIdentifier="{4FC737F1-C7A5-4376-A066-2A32D752A2FF}">
<File
RelativePath=".\ass_drawing.cpp">
</File>
</Filter>
<Filter
Name="Header Files"

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@ -24,6 +24,7 @@ Other stuff / wishlist:
* Maybe import outlines of one or more characters from a font to modify?
(At least is possible with Win32 and Freetype2.)
* Convert segments between different types
* Binary operations with other shapes
Things to check:
* What happens when a drawing doesn't start with an 'm' command?