dynamic width right aligned rendering with Font

[l2e.git] / src / graphics / Font.cpp

diff --git a/src/graphics/Font.cpp b/src/graphics/Font.cpp
index 0ff3d9d4d90360b997277ee20226920d1e4d6bb2..069d0325f90ffd124bfd9b9d9eb63ad621d528ac 100644 (file)
--- a/src/graphics/Font.cpp
+++ b/src/graphics/Font.cpp
@@ -1,39 +1,114 @@
-/*
- * Font.cpp
- *
- *  Created on: Aug 8, 2012
- *      Author: holy
- */
-
 #include "Font.h"
 
-#include "../geometry/operators.h"
-#include "../geometry/Vector.h"
+#include "../loader/Interpreter.h"
+#include "../loader/TypeDescription.h"
 
 #include <cmath>
+#include <cstring>
+#include <iostream>
 
-using geometry::Point;
 using geometry::Vector;
+using loader::FieldDescription;
+using loader::Interpreter;
+using loader::TypeDescription;
 using std::pow;
 
 namespace graphics {
 
-void Font::DrawDigit(int digit, SDL_Surface *dest, Point<int> position) const {
-       sprite->Draw(dest, position, digitsCol + digit, digitsRow);
+int Font::StringWidth(const char *s) const {
+       int width(0), col(0);
+       for (int i(0); s[i]; ++i) {
+               if (s[i] == '\n') {
+                       if (width < col) {
+                               width = col;
+                       }
+                       col = 0;
+               } else {
+                       ++col;
+               }
+       }
+       return (width < col ? col : width) * CharWidth();
+}
+
+int Font::StringHeight(const char *s) const {
+       if (*s == '\0') {
+               return 0;
+       }
+       int height(1);
+       for (; *s; ++s) {
+               if (*s == '\n') {
+                       ++height;
+               }
+       }
+       return height * CharHeight();
+}
+
+
+void Font::DrawChar(char c, SDL_Surface *dest, const Vector<int> &position) const {
+       if (!sprite) return;
+
+       int col(colOffset + (c % 0x10));
+       int row(rowOffset + (c / 0x10));
+       sprite->Draw(dest, position, col, row);
+}
+
+void Font::DrawString(const char *s, SDL_Surface *dest, const Vector<int> &positionIn, int maxWidth) const {
+       if (!sprite) return;
+
+       Vector<int> position(positionIn);
+       Vector<int> lineHead(positionIn);
+       Vector<int> step(CharWidth(), 0);
+       Vector<int> lineBreak(0, CharHeight());
+       for (int i(0), col(0); s[i] && (maxWidth <= 0 || col < maxWidth); ++i) {
+               if (s[i] == '\n') {
+                       lineHead += lineBreak;
+                       position = lineHead;
+                       col = 0;
+               } else {
+                       DrawChar(s[i], dest, position);
+                       position += step;
+                       ++col;
+               }
+       }
+}
+
+void Font::DrawStringRight(const char *s, SDL_Surface *dest, const Vector<int> &positionIn, int maxWidth) const {
+       // NOTE: this does not handle line breaks
+       if (!sprite) return;
+
+       int length(0);
+       if (maxWidth > 0) {
+               while (length < maxWidth && s[length] != '\0') {
+                       ++length;
+               }
+       } else {
+               length = std::strlen(s);
+       }
+       Vector<int> position(positionIn.X() - length * CharWidth(), positionIn.Y());
+
+       DrawString(s, dest, position, length);
+}
+
+void Font::DrawDigit(int digit, SDL_Surface *dest, const Vector<int> &position) const {
+       if (!sprite) return;
+
+       DrawChar(digit + 0x30, dest, position);
 }
 
-void Font::DrawNumber(int numberIn, SDL_Surface *dest, Point<int> positionIn, int digits) const {
+void Font::DrawNumber(int numberIn, SDL_Surface *dest, const Vector<int> &positionIn, int digits) const {
+       if (!sprite) return;
+
        int number(numberIn);
        if (digits > 0 && numberIn >= pow(10.0, digits)) {
                numberIn = pow(10.0, digits) - 1;
        }
 
-       Point<int> position(positionIn);
+       Vector<int> position(positionIn);
        Vector<int> step(sprite->Width(), 0);
 
        if (digits > 0) {
                int i(digits - 1);
-               while (number < pow(10.0, i)) {
+               while (number < pow(10.0, i) && i > 0) {
                        position += step;
                        --i;
                }
@@ -51,4 +126,43 @@ void Font::DrawNumber(int numberIn, SDL_Surface *dest, Point<int> positionIn, in
        }
 }
 
+void Font::DrawNumberRight(int number, SDL_Surface *dest, const Vector<int> &positionIn, int digits) const {
+       if (!sprite) return;
+
+       Vector<int> position(positionIn);
+       if (digits > 0) {
+               position.X() -= digits * CharWidth();
+       } else if (number == 0) {
+               position.X() -= CharWidth();
+       } else {
+               for (int i = number; i > 0; i /= 10) {
+                       position.X() -= CharWidth();
+               }
+       }
+
+       DrawNumber(number, dest, position, digits);
+}
+
+
+void Font::CreateTypeDescription() {
+       Font f;
+
+       TypeDescription &td(TypeDescription::Create(TYPE_ID, "Font"));
+       td.SetDescription(
+                       "Simple font with fixed-width characters using a sprite for rendering.\n"
+                       "Characters from strings are mapped as follows:\n"
+                       "<pre>sprite column = column offset + (character % 16)\n"
+                       "sprite row    = row    offset + (character / 16)</pre>");
+       td.SetConstructor(&Construct);
+       td.SetSize(sizeof(Font));
+
+       td.AddField("sprite", FieldDescription(((char *)&f.sprite) - ((char *)&f), Sprite::TYPE_ID).SetReferenced().SetDescription("a sprite where each tile corresponds to a character"));
+       td.AddField("columnoffset", FieldDescription(((char *)&f.colOffset) - ((char *)&f), Interpreter::NUMBER_ID).SetDescription("offset of the column of the first character"));
+       td.AddField("rowoffset", FieldDescription(((char *)&f.rowOffset) - ((char *)&f), Interpreter::NUMBER_ID).SetDescription("offset of the row of the first character"));
+}
+
+void Font::Construct(void *data) {
+       new (data) Font;
+}
+
 }