diff options
Diffstat (limited to 'rect.c')
| -rw-r--r-- | rect.c | 79 |
1 files changed, 19 insertions, 60 deletions
@@ -208,7 +208,6 @@ static double4 clip (const double4 in, const double g, const double linrange, int render_parallel (flam3_frame *spec, void *out, stat_struct *stats) { long nbuckets; - int i, j, k; double ppux=0, ppuy=0; int image_width, image_height; /* size of the image to produce */ int out_width; @@ -243,7 +242,7 @@ int render_parallel (flam3_frame *spec, void *out, stat_struct *stats) { /* Initialize the thread helper structures */ fth = (flam3_thread_helper *)calloc(spec->nthreads,sizeof(flam3_thread_helper)); - for (i=0;i<spec->nthreads;i++) + for (unsigned int i=0;i<spec->nthreads;i++) fth[i].cp.final_xform_index=-1; /* Set up the output image dimensions, adjusted for scanline */ @@ -263,21 +262,13 @@ int render_parallel (flam3_frame *spec, void *out, stat_struct *stats) { nbuckets * sizeof (*buckets)); assert (ret == 0); assert (buckets != NULL); - double4 *accumulate; - ret = posix_memalign ((void **) &accumulate, sizeof (*accumulate), - nbuckets * sizeof (*accumulate)); - assert (ret == 0); - assert (accumulate != NULL); - - memset(accumulate, 0, sizeof(*accumulate) * nbuckets); + memset (buckets, 0, nbuckets * sizeof (*buckets)); + double sample_density=0.0; /* Batch loop - outermost */ { - double sample_density=0.0; - double k1, area, k2; - memset(buckets, 0, sizeof(*buckets) * nbuckets); { @@ -294,9 +285,9 @@ int render_parallel (flam3_frame *spec, void *out, stat_struct *stats) { /* compute the colormap entries. */ /* the input colormap is 256 long with entries from 0 to 1.0 */ - for (j = 0; j < CMAP_SIZE; j++) { + for (unsigned int j = 0; j < CMAP_SIZE; j++) { dmap[j].index = cp.palette[(j * 256) / CMAP_SIZE].index / 256.0; - for (k = 0; k < 4; k++) + for (unsigned int k = 0; k < 4; k++) dmap[j].color[k] = cp.palette[(j * 256) / CMAP_SIZE].color[k]; } @@ -393,10 +384,7 @@ int render_parallel (flam3_frame *spec, void *out, stat_struct *stats) { } - /* XXX: the original formula has a factor 268/256 in here, not sure why */ - k1 = cp.contrast * cp.brightness; - area = image_width * image_height / (ppux * ppuy); - k2 = 1.0 / (cp.contrast * area * sample_density); + #if 0 printf("iw=%d,ih=%d,ppux=%f,ppuy=%f\n",image_width,image_height,ppux,ppuy); printf("contrast=%f, brightness=%f, PREFILTER=%d\n", @@ -406,66 +394,41 @@ int render_parallel (flam3_frame *spec, void *out, stat_struct *stats) { printf("k1=%f,k2=%15.12f\n",k1,k2); #endif - for (j = 0; j < fic.height; j++) { - for (i = 0; i < fic.width; i++) { - const double4 c = buckets[i + j * fic.width]; - - if (0.0 == c[3]) - continue; - - const double ls = (k1 * log(1.0 + c[3] * k2))/c[3]; - - accumulate[i + j * fic.width] += c * ls; - } - } - } /* filter the accumulation buffer down into the image */ if (1) { - int x, y; const double g = 1.0 / (gamma / vib_gam_n); double linrange = cp.gam_lin_thresh; vibrancy /= vib_gam_n; - /* If we're in the early clip mode, perform this first step to */ - /* apply the gamma correction and clipping before the spat filt */ - - if (spec->earlyclip) { - for (j = 0; j < fic.height; j++) { - for (i = 0; i < fic.width; i++) { - const double4 in = accumulate[i + j*fic.width]; - accumulate[i + j*fic.width] = clip (in, g, linrange, highpow, - vibrancy); - } - } - } + /* XXX: the original formula has a factor 268/256 in here, not sure why */ + const double k1 = cp.contrast * cp.brightness; + const double area = image_width * image_height / (ppux * ppuy); + const double k2 = 1.0 / (cp.contrast * area * sample_density); - /* Apply the spatial filter */ - y = 0; - for (j = 0; j < image_height; j++) { - x = 0; - for (i = 0; i < image_width; i++) { - double4 t = accumulate[x + y * fic.width]; + for (unsigned int y = 0; y < image_height; y++) { + for (unsigned int x = 0; x < image_width; x++) { + double4 t = buckets[x + y * fic.width]; - /* The old way, spatial filter first and then clip after gamma */ - if (!spec->earlyclip) { - t = clip (t, g, linrange, highpow, vibrancy); - } + const double ls = (k1 * log(1.0 + t[3] * k2))/t[3]; + + t = t * ls; + t = clip (t, g, linrange, highpow, vibrancy); const double maxval = (1 << (bytes_per_channel*8)) - 1; t = nearbyint_d4 (t * maxval); if (bytes_per_channel == 2) { - uint16_t * const p = &((uint16_t *) out)[channels * (i + j * out_width)]; + uint16_t * const p = &((uint16_t *) out)[channels * (x + y * out_width)]; p[0] = t[0]; p[1] = t[1]; p[2] = t[2]; p[3] = t[3]; } else if (bytes_per_channel == 1) { - uint8_t * const p = &((uint8_t *) out)[channels * (i + j * out_width)]; + uint8_t * const p = &((uint8_t *) out)[channels * (x + y * out_width)]; p[0] = t[0]; p[1] = t[1]; p[2] = t[2]; @@ -473,10 +436,7 @@ int render_parallel (flam3_frame *spec, void *out, stat_struct *stats) { } else { assert (0); } - - x += 1; } - y += 1; } } @@ -485,7 +445,6 @@ int render_parallel (flam3_frame *spec, void *out, stat_struct *stats) { stats->badvals = fic.badvals; free(buckets); - free(accumulate); /* We have to clear the cps in fth first */ for (thi = 0; thi < spec->nthreads; thi++) { clear_cp(&(fth[thi].cp),0); |