mirror of
https://github.com/minetest/minetestmapper.git
synced 2024-11-14 14:40:30 +01:00
107 lines
2.2 KiB
C++
107 lines
2.2 KiB
C++
#include <cstdio>
|
|
#include <cerrno>
|
|
#include <cstring>
|
|
#include <iostream>
|
|
#include <sstream>
|
|
#include <stdexcept>
|
|
#include <gd.h>
|
|
#include <gdfontmb.h>
|
|
|
|
#include "Image.h"
|
|
|
|
#ifndef NDEBUG
|
|
#define SIZECHECK(x, y) do { \
|
|
if((x) < 0 || (x) >= m_width) \
|
|
throw std::out_of_range("sizecheck x"); \
|
|
if((y) < 0 || (y) >= m_height) \
|
|
throw std::out_of_range("sizecheck y"); \
|
|
} while(0)
|
|
#else
|
|
#define SIZECHECK(x, y) do {} while(0)
|
|
#endif
|
|
|
|
// ARGB but with inverted alpha
|
|
|
|
static inline int color2int(Color c)
|
|
{
|
|
u8 a = 255 - c.a;
|
|
return (a << 24) | (c.r << 16) | (c.g << 8) | c.b;
|
|
}
|
|
|
|
static inline Color int2color(int c)
|
|
{
|
|
Color c2;
|
|
u8 a;
|
|
c2.b = c & 0xff;
|
|
c2.g = (c >> 8) & 0xff;
|
|
c2.r = (c >> 16) & 0xff;
|
|
a = (c >> 24) & 0xff;
|
|
c2.a = 255 - a;
|
|
return c2;
|
|
}
|
|
|
|
|
|
Image::Image(int width, int height) :
|
|
m_width(width), m_height(height), m_image(NULL)
|
|
{
|
|
m_image = gdImageCreateTrueColor(m_width, m_height);
|
|
}
|
|
|
|
Image::~Image()
|
|
{
|
|
gdImageDestroy(m_image);
|
|
}
|
|
|
|
void Image::setPixel(int x, int y, const Color &c)
|
|
{
|
|
SIZECHECK(x, y);
|
|
m_image->tpixels[y][x] = color2int(c);
|
|
}
|
|
|
|
Color Image::getPixel(int x, int y)
|
|
{
|
|
#ifndef NDEBUG
|
|
if(x < 0 || x > m_width || y < 0 || y > m_height)
|
|
throw std::out_of_range("sizecheck");
|
|
#endif
|
|
return int2color(m_image->tpixels[y][x]);
|
|
}
|
|
|
|
void Image::drawLine(int x1, int y1, int x2, int y2, const Color &c)
|
|
{
|
|
SIZECHECK(x1, y1);
|
|
SIZECHECK(x2, y2);
|
|
gdImageLine(m_image, x1, y1, x2, y2, color2int(c));
|
|
}
|
|
|
|
void Image::drawText(int x, int y, const std::string &s, const Color &c)
|
|
{
|
|
SIZECHECK(x, y);
|
|
gdImageString(m_image, gdFontGetMediumBold(), x, y, (unsigned char*) s.c_str(), color2int(c));
|
|
}
|
|
|
|
void Image::drawFilledRect(int x, int y, int w, int h, const Color &c)
|
|
{
|
|
SIZECHECK(x, y);
|
|
SIZECHECK(x + w - 1, y + h - 1);
|
|
gdImageFilledRectangle(m_image, x, y, x + w - 1, y + h - 1, color2int(c));
|
|
}
|
|
|
|
void Image::drawCircle(int x, int y, int diameter, const Color &c)
|
|
{
|
|
SIZECHECK(x, y);
|
|
gdImageArc(m_image, x, y, diameter, diameter, 0, 360, color2int(c));
|
|
}
|
|
|
|
void Image::save(const std::string &filename)
|
|
{
|
|
FILE *f = fopen(filename.c_str(), "wb");
|
|
if(!f) {
|
|
std::ostringstream oss;
|
|
oss << "Error writing image file: " << std::strerror(errno);
|
|
throw std::runtime_error(oss.str());
|
|
}
|
|
gdImagePng(m_image, f); // other formats?
|
|
fclose(f);
|
|
}
|