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Restore the ability to create greyscale images

tags/v1.8.0
Xerbo 4 years ago
parent
commit
cd3b206d7a
2 changed files with 30 additions and 13 deletions
  1. +1
    -1
      README.md
  2. +29
    -12
      pngio.c

+ 1
- 1
README.md View File

@@ -80,7 +80,7 @@ Default: Internal defaults

## Output

Generated images are outputted in PNG, 8 bit greyscale for raw and channel A|B images, palleted images for temperature and GVI false color, 24 bit RGB for false color.
Generated images are outputted in PNG and are 24 bit RGB for all image types apart from pure greyscale images.

Image names are `audiofile-x.png`, where `x` is:



+ 29
- 12
pngio.c View File

@@ -217,6 +217,7 @@ int ImageOut(options_t *opts, image_t *img, int offset, int width, char *desc, c
};

// Reduce the width of the image to componsate for the missing telemetry
int fcimage = strcmp(desc, "False Color") == 0;
int skiptele = 0;
if(opts->effects != NULL && CONTAINS(opts->effects, 't')){
width -= TOTAL_TELE;
@@ -237,10 +238,20 @@ int ImageOut(options_t *opts, image_t *img, int offset, int width, char *desc, c
return(0);
}

// 8 bit RGB image
png_set_IHDR(png_ptr, info_ptr, width, img->nrow,
8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
int greyscale = 0;
if(palette == NULL && !CONTAINS(opts->effects, 'p') && !fcimage && opts->map[0] == '\0' && strcmp(chid, "MCIR") != 0){
greyscale = 1;

// Greyscale image
png_set_IHDR(png_ptr, info_ptr, width, img->nrow,
8, PNG_COLOR_TYPE_GRAY, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
}else{
// 8 bit RGB image
png_set_IHDR(png_ptr, info_ptr, width, img->nrow,
8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
}

png_set_text(png_ptr, info_ptr, text_ptr, 3);

@@ -294,14 +305,13 @@ int ImageOut(options_t *opts, image_t *img, int offset, int width, char *desc, c
printf("Writing %s", outName);

extern rgb_t falsecolor(float vis, float temp);
int fcimage = strcmp(desc, "False Color") == 0;

// Build RGB image
int skip;
// Build image
for (int y = 0; y < img->nrow; y++) {
png_color pix[width];
for (int x = 0, skip = 0; x < width; x++) {
int skip = 0;
for (int x = 0; x < width; x++) {
if(skiptele){
switch (x) {
case 0:
@@ -315,15 +325,22 @@ int ImageOut(options_t *opts, image_t *img, int offset, int width, char *desc, c
break;
}
}
if(fcimage){
if(greyscale){
// Horrific but works
if(x % 3 == 0){
pix[x/3].red = img->prow[y][x + skip + offset ];
pix[x/3].green = img->prow[y][x + skip + offset+1];
pix[x/3].blue = img->prow[y][x + skip + offset+2];
}
}else if(fcimage){
rgb_t pixel = falsecolor(img->prow[y][x + CHA_OFFSET], img->prow[y][x + CHB_OFFSET]);
pix[x].red = pixel.r;
pix[x].green = pixel.g;
pix[x].blue = pixel.b;
}else{
pix[x].red = (int)crow[y][x + skip + offset].r;
pix[x].green = (int)crow[y][x + skip + offset].g;
pix[x].blue = (int)crow[y][x + skip + offset].b;
pix[x].red = crow[y][x + skip + offset].r;
pix[x].green = crow[y][x + skip + offset].g;
pix[x].blue = crow[y][x + skip + offset].b;
}
}


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