104 lines
2.1 KiB
C++
104 lines
2.1 KiB
C++
#include <cstdio>
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#include <cerrno>
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#include <cstring>
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#include <iostream>
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#include <sstream>
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#include <stdexcept>
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#include "Image.h"
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#ifndef NDEBUG
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#define SIZECHECK(x, y) do { \
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if((x) < 0 || (x) >= m_width) \
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throw std::out_of_range("sizecheck x"); \
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if((y) < 0 || (y) >= m_height) \
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throw std::out_of_range("sizecheck y"); \
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} while(0)
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#else
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#define SIZECHECK(x, y) do {} while(0)
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#endif
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// ARGB but with inverted alpha
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static inline RGBQUAD color2rgbquad(Color c)
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{
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RGBQUAD c2;
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c2.rgbRed = c.r;
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c2.rgbGreen = c.g;
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c2.rgbBlue = c.b;
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return c2;
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}
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static inline Color rgbquad2color(RGBQUAD c)
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{
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return Color(c.rgbRed, c.rgbGreen, c.rgbBlue);
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}
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Image::Image(int width, int height) :
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m_width(width), m_height(height), m_image(NULL)
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{
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// FIXME: This works because minetestmapper only creates one image
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FreeImage_Initialise();
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printf("Using FreeImage v%s\n", FreeImage_GetVersion());
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m_image = FreeImage_Allocate(width, height, 24);
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}
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Image::~Image()
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{
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FreeImage_Unload(m_image);
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}
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void Image::setPixel(int x, int y, const Color &c)
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{
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SIZECHECK(x, y);
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RGBQUAD col = color2rgbquad(c);
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FreeImage_SetPixelColor(m_image, x, y, &col);
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}
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Color Image::getPixel(int x, int y)
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{
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#ifndef NDEBUG
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if(x < 0 || x > m_width || y < 0 || y > m_height)
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throw std::out_of_range("sizecheck");
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#endif
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RGBQUAD c;
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FreeImage_GetPixelColor(m_image, x, y, &c);
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return rgbquad2color(c);
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}
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void Image::drawLine(int x1, int y1, int x2, int y2, const Color &c)
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{
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SIZECHECK(x1, y1);
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SIZECHECK(x2, y2);
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// TODO
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}
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void Image::drawText(int x, int y, const std::string &s, const Color &c)
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{
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SIZECHECK(x, y);
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// TODO
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}
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void Image::drawFilledRect(int x, int y, int w, int h, const Color &c)
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{
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SIZECHECK(x, y);
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SIZECHECK(x + w - 1, y + h - 1);
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RGBQUAD col = color2rgbquad(c);
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for(int xx = 0; xx < w; xx++)
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for(int yy = 0; yy < h; yy++)
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FreeImage_SetPixelColor(m_image, x + xx, y + yy, &col);
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}
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void Image::drawCircle(int x, int y, int diameter, const Color &c)
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{
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SIZECHECK(x, y);
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// TODO
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}
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void Image::save(const std::string &filename)
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{
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FreeImage_Save(FIF_PNG, m_image, filename.c_str()); // other formats?
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}
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