diff options
| -rw-r--r-- | bin/brot.c | 29 |
1 files changed, 20 insertions, 9 deletions
diff --git a/bin/brot.c b/bin/brot.c index bc8ce56d..1f76fd08 100644 --- a/bin/brot.c +++ b/bin/brot.c @@ -21,11 +21,15 @@ #include <stdint.h> #include <stdio.h> #include <stdlib.h> +#include <sys/time.h> #include <sysexits.h> #include <unistd.h> #include "gfx/gfx.h" +#define RGB(r, g, b) ((uint32_t)(r) << 16 | (uint32_t)(g) << 8 | (uint32_t)(b)) +#define GRAY(n) RGB(n, n, n) + static double absSq(double complex z) { return creal(z) * creal(z) + cimag(z) * cimag(z); } @@ -41,25 +45,31 @@ static uint32_t mandelbrot(double complex c) { return 0; } -static uint32_t color(uint32_t n) { - uint32_t gray = (double)n / (double)depth * 255.0; - return gray << 16 | gray << 8 | gray; -} - static double complex translate = -0.75; static double complex transform = 2.5; +static double frameTime; void draw(uint32_t *buf, size_t width, size_t height) { + struct timeval t0, t1; + gettimeofday(&t0, NULL); + double yRatio = (height > width) ? (double)height / (double)width : 1.0; double xRatio = (width > height) ? (double)width / (double)height : 1.0; for (size_t y = 0; y < height; ++y) { for (size_t x = 0; x < width; ++x) { double zx = ((double)x / (double)width - 0.5) * xRatio; double zy = ((double)y / (double)height - 0.5) * yRatio; - uint32_t n = mandelbrot((zx + zy * I) * transform + translate); - buf[y * width + x] = color(n); + buf[y * width + x] = mandelbrot((zx + zy * I) * transform + translate); } } + + for (size_t i = 0; i < width * height; ++i) { + buf[i] = GRAY(255 * buf[i] / depth); + } + + gettimeofday(&t1, NULL); + frameTime = (double)(t1.tv_sec - t0.tv_sec) + + ((double)t1.tv_usec - (double)t0.tv_usec) * 0.000001; } static double translateStep = 1.0 / 128.0; @@ -88,10 +98,11 @@ const char *status(void) { static char buf[256]; snprintf( buf, sizeof(buf), - "brot -i %u -t %g%+gi -f %g%+gi", + "brot -i %u -t %g%+gi -f %g%+gi # %.6f", depth, creal(translate), cimag(translate), - creal(transform), cimag(transform) + creal(transform), cimag(transform), + frameTime ); return buf; } |