1 |
#include "gdimg.h" |
2 |
|
3 |
int GDImg::defaultBg=0xFFFFFF; |
4 |
|
5 |
GDImg::GDImg(int w, int h, const char* fn, int bg_rgb) { |
6 |
fout=NULL; |
7 |
imgH=h; |
8 |
imgW=w; |
9 |
img = gdImageCreate(imgW, imgH); |
10 |
currentColor=-1; |
11 |
if (fn!=NULL) setFile(fn); |
12 |
//allocate white background color by default |
13 |
bgColor=color(bg_rgb); |
14 |
gdImageColorTransparent(img, -1); //default is non-transparent white background |
15 |
} |
16 |
|
17 |
void GDImg::setBg(int rgb) { |
18 |
//if (rgb!=defaultBg) bgColor=color(rgb); |
19 |
gdImageColorDeallocate(img, bgColor); |
20 |
bgColor=this->color(rgb); |
21 |
} |
22 |
|
23 |
GDImg::~GDImg() { |
24 |
gdImageDestroy(img); |
25 |
if (fout!=NULL && fout!=stdout) fclose(fout); |
26 |
} |
27 |
|
28 |
int GDImg::color(byte r, byte g, byte b) { |
29 |
return gdImageColorAllocate(img,(int)r,(int)g,(int)b); |
30 |
} |
31 |
|
32 |
void GDImg::line(int x1, int y1, int x2, int y2, int color) { |
33 |
if (color==-1) color=currentColor; |
34 |
gdImageLine(img,x1,y1,x2,y2,color); |
35 |
} |
36 |
|
37 |
void GDImg::rectangle(int x1, int y1, int x2, int y2, int color) { |
38 |
if (color==-1) color=currentColor; |
39 |
gdImageRectangle(img,x1,y1,x2,y2,color); |
40 |
} |
41 |
|
42 |
void GDImg::fillRectangle(int x1, int y1, int x2, int y2, int color) { |
43 |
if (color==-1) color=currentColor; |
44 |
gdImageFilledRectangle(img,x1,y1,x2,y2,color); |
45 |
} |
46 |
|
47 |
|
48 |
void GDImg::fillPolygon(gdPointPtr points, int ptotal, int color) { |
49 |
if (color==-1) color=currentColor; |
50 |
gdImageFilledPolygon(img, points,ptotal,color); |
51 |
} |
52 |
|
53 |
void GDImg::setTransparent(int cidx) { |
54 |
//cidx must be the color index of a color allocated previously for img! |
55 |
gdImageColorTransparent(img,cidx); |
56 |
} |
57 |
|
58 |
void GDImg::setFile(const char* fname) { |
59 |
if (fout!=NULL && fout!=stdout) fclose(fout); |
60 |
if (fname[0]=='-' && fname[1]==0) { |
61 |
//special "-" file name means stdout |
62 |
fout=stdout; |
63 |
} |
64 |
else { |
65 |
fout=fopen(fname, "wb"); |
66 |
if (fout==NULL) GError("Error: cannot open file %s for writing!\n",fname); |
67 |
} |
68 |
} |
69 |
|
70 |
void GDImg::setFile(FILE* f) { |
71 |
if (fout!=NULL && fout!=stdout) fclose(fout); |
72 |
fout=f; |
73 |
} |
74 |
|
75 |
void GDImg::write(const char* fname) { |
76 |
if (fname==NULL && fout==NULL) |
77 |
GError("Error at GDImg::writeGIF() - no destination file given!\n"); |
78 |
if (fname!=NULL) setFile(fname); |
79 |
gdImageGif(img,fout); |
80 |
} |