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Simplify graph gradient stuff.

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This commit is contained in:
Brenden Matthews 2009-05-26 11:44:16 -06:00
parent d65c33146e
commit ed5dbc02bb
3 changed files with 23 additions and 55 deletions
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70
src/colours.c
View File

@ -88,43 +88,51 @@ unsigned int adjust_colours(unsigned int colour)
}
/* this function returns the next colour between two colours for a gradient */
unsigned long *do_gradient(float diff, int width, unsigned long first_colour, unsigned long last_colour)
unsigned long *do_gradient(int width, unsigned long first_colour, unsigned long last_colour)
{
int red1, green1, blue1; // first colour
int red2, green2, blue2; // last colour
int reddiff, greendiff, bluediff; // difference
short redshift = (2 * colour_depth / 3 + colour_depth % 3);
short greenshift = (colour_depth / 3);
unsigned long *colours = malloc(width * sizeof(unsigned long));
int i;
if (colour_depth == 0) {
set_up_gradient();
}
red1 = (first_colour & redmask) >> redshift;
green1 = (first_colour & greenmask) >> greenshift;
blue1 = first_colour & bluemask;
red2 = (last_colour & redmask) >> redshift;
green2 = (last_colour & greenmask) >> greenshift;
blue2 = last_colour & bluemask;
reddiff = abs(red1 - red2);
greendiff = abs(green1 - green2);
bluediff = abs(blue1 - blue2);
#ifdef HAVE_OPENMP
#pragma omp parallel for
#endif /* HAVE_OPENMP */
for (i = 0; i < width; i++) {
int red3 = 0, green3 = 0, blue3 = 0; // colour components
int factor = round_to_int(diff * ((float)i / width));
float factor = ((float)(i + 1) / width);
if (red1 > red2) {
red3 = -factor;
/* the '+ 0.5' bit rounds our floats to ints properly */
if (red1 >= red2) {
red3 = -(factor * reddiff) - 0.5;
} else if (red1 < red2) {
red3 = factor;
red3 = factor * reddiff + 0.5;
}
if (green1 > green2) {
green3 = -factor;
if (green1 >= green2) {
green3 = -(factor * greendiff) - 0.5;
} else if (green1 < green2) {
green3 = factor;
green3 = factor * greendiff + 0.5;
}
if (blue1 > blue2) {
blue3 = -factor;
if (blue1 >= blue2) {
blue3 = -(factor * bluediff) - 0.5;
} else if (blue1 < blue2) {
blue3 = factor;
blue3 = factor * bluediff + 0.5;
}
red3 += red1;
green3 += green1;
@ -144,47 +152,11 @@ unsigned long *do_gradient(float diff, int width, unsigned long first_colour, un
if (green3 > bluemask) {
green3 = bluemask;
}
if (blue1 > bluemask) {
blue1 = bluemask;
if (blue3 > bluemask) {
blue3 = bluemask;
}
colours[i] = (red3 << redshift) | (green3 << greenshift) | blue3;
}
return colours;
}
/* this function returns the max diff for a gradient */
unsigned long gradient_max(unsigned long first_colour,
unsigned long last_colour)
{
int red1, green1, blue1; // first colour
int red2, green2, blue2; // second colour
int red3 = 0, green3 = 0, blue3 = 0; // difference
long redshift, greenshift;
int max;
if (colour_depth == 0) {
set_up_gradient();
}
redshift = (2 * colour_depth / 3 + colour_depth % 3);
greenshift = (colour_depth / 3);
red1 = (first_colour & redmask) >> redshift;
green1 = (first_colour & greenmask) >> greenshift;
blue1 = first_colour & bluemask;
red2 = (last_colour & redmask) >> redshift;
green2 = (last_colour & greenmask) >> greenshift;
blue2 = last_colour & bluemask;
red3 = abs(red1 - red2);
green3 = abs(green1 - green2);
blue3 = abs(blue1 - blue2);
max = red3;
if (green3 > max) {
max = green3;
}
if (blue3 > max) {
max = blue3;
}
return max;
}

3
src/colours.h
View File

@ -28,7 +28,6 @@
#define _COLOURS_H
unsigned int adjust_colours(unsigned int);
unsigned long *do_gradient(float, int, unsigned long, unsigned long);
unsigned long gradient_max(unsigned long, unsigned long);
unsigned long *do_gradient(int, unsigned long, unsigned long);
#endif /* _COLOURS_H */

5
src/conky.c
View File

@ -6095,10 +6095,7 @@ static void draw_line(char *s)
if (specials[special_index].last_colour != 0
|| specials[special_index].first_colour != 0) {
int gradient_size =
gradient_max(specials[special_index].last_colour,
specials[special_index].first_colour);
tmpcolour = do_gradient(gradient_size, w - 1, specials[special_index].first_colour, specials[special_index].last_colour);
tmpcolour = do_gradient(w - 1, specials[special_index].last_colour, specials[special_index].first_colour);
}
colour_idx = 0;
for (i = w - 2; i > -1; i--) {