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authorMattias Andrée <maandree@kth.se>2021-03-05 00:43:38 +0100
committerMattias Andrée <maandree@kth.se>2021-03-05 00:43:38 +0100
commit0ce0d8d6e0c420ccafa79e0203b928c3559a4311 (patch)
tree88e8228a93691c28811a49898abf86a96dd9d613 /libgamma_gamma_rampsf_initialise.c
parentChange license + change style + misc (diff)
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Split source files, merge public header files, eliminite use gpp, rewrite makefile
Signed-off-by: Mattias Andrée <maandree@kth.se>
Diffstat (limited to 'libgamma_gamma_rampsf_initialise.c')
-rw-r--r--libgamma_gamma_rampsf_initialise.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/libgamma_gamma_rampsf_initialise.c b/libgamma_gamma_rampsf_initialise.c
new file mode 100644
index 0000000..b77fc83
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+++ b/libgamma_gamma_rampsf_initialise.c
@@ -0,0 +1,23 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+/**
+ * Initialise a gamma ramp in the proper way that allows all adjustment
+ * methods to read from and write to it without causing segmentation violation
+ *
+ * The input must have `red_size`, `green_size`, and `blue_size` set to the
+ * sizes of the gamma ramps that should be allocated
+ *
+ * @param this The gamma ramps
+ * @return Zero on success, -1 on allocation error, `errno` will be set accordingly
+ */
+int
+libgamma_gamma_rampsf_initialise(libgamma_gamma_rampsf_t *restrict this)
+{
+ size_t n = this->red_size + this->green_size + this->blue_size;
+ this->red = malloc(n * sizeof(float));
+ this->green = &this-> red[this-> red_size];
+ this->blue = &this->green[this->green_size];
+ return this->red ? 0 : -1;
+}