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minetestmapper
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Allow the playername labels/markers to cross image edges. 

Also the orgin circle.
This commit is contained in:
Martijn Versteegh 2018-11-14 12:17:16 +01:00
parent 97c5dc0a83
commit c382c2c3ba
1 changed files with 20 additions and 15 deletions
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35
Image.cpp
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@ -10,11 +10,16 @@
#include "Image.h"
#ifndef NDEBUG
#define SIZECHECK(x, y) check_bounds((x), (y), m_width, m_height)
// allow x,y to be 256 pixels outside of the image.
// this allows stuff like the playername labels to be drawn somewhat outside of the
// image (relying on gd's built in clipping) while still catching probable
// buggy draw operations
#define SIZECHECK_FUZZY(x, y) check_bounds((x), (y), m_width, m_height, 256)
#else
#define SIZECHECK(x, y) do {} while(0)
#define SIZECHECK_FUZZY(x, y) do {} while(0)
#endif
// ARGB but with inverted alpha
static inline int color2int(Color c)
@ -35,18 +40,18 @@ static inline Color int2color(int c)
return c2;
}
static inline void check_bounds(int x, int y, int width, int height)
static inline void check_bounds(int x, int y, int width, int height, int border)
{
if(x < 0 || x >= width) {
if(x < -border || x >= width + border) {
std::ostringstream oss;
oss << "Access outside image bounds (x), 0 < "
<< x << " < " << width << " is false.";
throw std::out_of_range(oss.str());
}
if(y < 0 || y >= height) {
if(y < -border || y >= height + border) {
std::ostringstream oss;
oss << "Access outside image bounds (y), 0 < "
<< y << " < " << height << " is false.";
oss << "Access outside image bounds (y)," << -border << " 0 < "
<< y << " < " << height+border << " is false.";
throw std::out_of_range(oss.str());
}
}
@ -65,39 +70,39 @@ Image::~Image()
void Image::setPixel(int x, int y, const Color &c)
{
SIZECHECK(x, y);
SIZECHECK_FUZZY(x, y);
m_image->tpixels[y][x] = color2int(c);
}
Color Image::getPixel(int x, int y)
{
SIZECHECK(x, y);
SIZECHECK_FUZZY(x, y);
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);
SIZECHECK_FUZZY(x1, y1);
SIZECHECK_FUZZY(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);
SIZECHECK_FUZZY(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);
SIZECHECK_FUZZY(x, y);
SIZECHECK_FUZZY(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);
SIZECHECK_FUZZY(x, y);
gdImageArc(m_image, x, y, diameter, diameter, 0, 360, color2int(c));
}