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-rw-r--r--src/coopgamma-server/chaining.c257
1 files changed, 257 insertions, 0 deletions
diff --git a/src/coopgamma-server/chaining.c b/src/coopgamma-server/chaining.c
new file mode 100644
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+++ b/src/coopgamma-server/chaining.c
@@ -0,0 +1,257 @@
+/**
+ * coopgammad -- Cooperative gamma server
+ * Copyright (C) 2016 Mattias Andrée (maandree@kth.se)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "chaining.h"
+
+#include <libclut.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+
+
+/**
+ * The name of the process
+ */
+extern char* restrict argv0;
+
+
+
+/**
+ * Apply a filter on top of another filter
+ *
+ * @param dest The output for the resulting ramp-trio, must be initialised
+ * @param application The red, green and blue ramps, as one single raw array,
+ * of the filter that should be applied
+ * @param depth -1: `float` stops
+ * -2: `double` stops
+ * Other: the number of bits of each (integral) stop
+ * @param base The CLUT on top of which the new filter should be applied,
+ * this can be the same pointer as `dest`
+ */
+void apply_filter(union gamma_ramps* restrict dest, void* restrict application,
+ int depth, union gamma_ramps* restrict base)
+{
+ union gamma_ramps app;
+ size_t bytedepth;
+ size_t red_width, green_width, blue_width;
+
+ if (depth == -1)
+ bytedepth = sizeof(float);
+ else if (depth == -2)
+ bytedepth = sizeof(double);
+ else
+ bytedepth = (size_t)depth / 8;
+
+ red_width = (app.u8.red_size = base->u8.red_size) * bytedepth;
+ green_width = (app.u8.green_size = base->u8.green_size) * bytedepth;
+ blue_width = (app.u8.blue_size = base->u8.blue_size) * bytedepth;
+
+ app.u8.red = application;
+ app.u8.green = app.u8.red + red_width;
+ app.u8.blue = app.u8.green + green_width;
+
+ if (dest != base)
+ {
+ memcpy(dest->u8.red, base->u8.red, red_width);
+ memcpy(dest->u8.green, base->u8.green, green_width);
+ memcpy(dest->u8.blue, base->u8.blue, blue_width);
+ }
+
+ switch (depth)
+ {
+ case 8:
+ libclut_apply(&(dest->u8), UINT8_MAX, uint8_t, &(app.u8), UINT8_MAX, uint8_t, 1, 1, 1);
+ break;
+ case 16:
+ libclut_apply(&(dest->u16), UINT16_MAX, uint16_t, &(app.u16), UINT16_MAX, uint16_t, 1, 1, 1);
+ break;
+ case 32:
+ libclut_apply(&(dest->u32), UINT32_MAX, uint32_t, &(app.u32), UINT32_MAX, uint32_t, 1, 1, 1);
+ break;
+ case 64:
+ libclut_apply(&(dest->u64), UINT64_MAX, uint64_t, &(app.u64), UINT64_MAX, uint64_t, 1, 1, 1);
+ break;
+ case -1:
+ libclut_apply(&(dest->f), 1.0f, float, &(app.d), 1.0f, float, 1, 1, 1);
+ break;
+ case -2:
+ libclut_apply(&(dest->d), (double)1, double, &(app.f), (double)1, double, 1, 1, 1);
+ break;
+ default:
+ abort();
+ }
+}
+
+
+
+/**
+ * Remove a filter from an output
+ *
+ * @param out The output
+ * @param filter The filter
+ * @return The index of the filter, `out->table_size` if not found
+ */
+static ssize_t remove_filter(struct output* restrict out, struct filter* restrict filter)
+{
+ size_t i, n = out->table_size;
+
+ for (i = 0; i < n; i++)
+ if (!strcmp(filter->class, out->table_filters[i].class))
+ break;
+
+ if (i == out->table_size)
+ {
+ fprintf(stderr, "%s: ignoring attempt to removing non-existing filter on CRTC %s: %s",
+ argv0, out->name, filter->class);
+ return (ssize_t)(out->table_size);
+ }
+
+ filter_destroy(out->table_filters + i);
+ libgamma_gamma_ramps8_destroy(&(out->table_sums[i].u8));
+
+ n = n - i - 1;
+ memmove(out->table_filters + i, out->table_filters + i + 1, n * sizeof(*(out->table_filters)));
+ memmove(out->table_sums + i, out->table_sums + i + 1, n * sizeof(*(out->table_sums)));
+ out->table_size--;
+
+ return (ssize_t)i;
+}
+
+
+/**
+ * Add a filter to an output
+ *
+ * @param out The output
+ * @param filter The filter
+ * @return The index given to the filter, -1 on error
+ */
+ssize_t add_filter(struct output* restrict out, struct filter* restrict filter)
+{
+ size_t i, n = out->table_size;
+ int r = -1;
+
+ /* Remove? */
+ if (filter->lifespan == LIFESPAN_REMOVE)
+ return remove_filter(out, filter);
+
+ /* Update? */
+ for (i = 0; i < n; i++)
+ if (!strcmp(filter->class, out->table_filters[i].class))
+ break;
+ if (i != n)
+ {
+ filter_destroy(out->table_filters + i);
+ out->table_filters[i] = *filter;
+ return (ssize_t)i;
+ }
+
+ /* Add! */
+ for (i = 0; i < n; i++)
+ if (filter->priority > out->table_filters[i].priority)
+ break;
+
+ if (n == out->table_alloc)
+ {
+ void* new;
+
+ new = realloc(out->table_filters, (n + 10) * sizeof(*(out->table_filters)));
+ if (new == NULL)
+ return -1;
+ out->table_filters = new;
+
+ new = realloc(out->table_sums, (n + 10) * sizeof(*(out->table_sums)));
+ if (new == NULL)
+ return -1;
+ out->table_sums = new;
+
+ out->table_alloc += 10;
+ }
+
+ memmove(out->table_filters + i + 1, out->table_filters + i, (n - i) * sizeof(*(out->table_filters)));
+ memmove(out->table_sums + i + 1, out->table_sums + i, (n - i) * sizeof(*(out->table_sums)));
+ out->table_size++;
+
+ COPY_RAMP_SIZES(&(out->table_sums[i].u8), out);
+ switch (out->depth)
+ {
+ case 8: r = libgamma_gamma_ramps8_initialise(&(out->table_sums[i].u8)); break;
+ case 16: r = libgamma_gamma_ramps16_initialise(&(out->table_sums[i].u16)); break;
+ case 32: r = libgamma_gamma_ramps32_initialise(&(out->table_sums[i].u32)); break;
+ case 64: r = libgamma_gamma_ramps64_initialise(&(out->table_sums[i].u64)); break;
+ case -1: r = libgamma_gamma_rampsf_initialise(&(out->table_sums[i].f)); break;
+ case -2: r = libgamma_gamma_rampsd_initialise(&(out->table_sums[i].d)); break;
+ default:
+ abort();
+ }
+ if (r < 0)
+ return -1;
+
+ out->table_filters[i] = *filter;
+
+ return (ssize_t)i;
+}
+
+
+/**
+ * Make identity mapping ramps
+ *
+ * @param ramps Output parameter for the ramps
+ * @param output The output for which the ramps shall be configured
+ * @return Zero on success, -1 on error
+ */
+int make_plain_ramps(union gamma_ramps* restrict ramps, struct output* restrict output)
+{
+ COPY_RAMP_SIZES(&(ramps->u8), output);
+ switch (output->depth)
+ {
+ case 8:
+ if (libgamma_gamma_ramps8_initialise(&(ramps->u8)))
+ return -1;
+ libclut_start_over(&(ramps->u8), UINT8_MAX, uint8_t, 1, 1, 1);
+ break;
+ case 16:
+ if (libgamma_gamma_ramps16_initialise(&(ramps->u16)))
+ return -1;
+ libclut_start_over(&(ramps->u16), UINT16_MAX, uint16_t, 1, 1, 1);
+ break;
+ case 32:
+ if (libgamma_gamma_ramps32_initialise(&(ramps->u32)))
+ return -1;
+ libclut_start_over(&(ramps->u32), UINT32_MAX, uint32_t, 1, 1, 1);
+ break;
+ case 64:
+ if (libgamma_gamma_ramps64_initialise(&(ramps->u64)))
+ return -1;
+ libclut_start_over(&(ramps->u64), UINT64_MAX, uint64_t, 1, 1, 1);
+ break;
+ case -1:
+ if (libgamma_gamma_rampsf_initialise(&(ramps->f)))
+ return -1;
+ libclut_start_over(&(ramps->f), 1.0f, float, 1, 1, 1);
+ break;
+ case -2:
+ if (libgamma_gamma_rampsd_initialise(&(ramps->d)))
+ return -1;
+ libclut_start_over(&(ramps->d), (double)1, double, 1, 1, 1);
+ break;
+ default:
+ abort();
+ }
+ return 0;
+}
+
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