colorspace

4 files changed, 166 insertions, 0 deletions

diff --git a/pixman/Makefile.am b/pixman/Makefile.am
index 8043804..969e293 100644
--- a/pixman/Makefile.am
+++ b/pixman/Makefile.am
@@ -6,6 +6,7 @@ libpixman_1_la_SOURCES =			\
 	pixman-accessor.h			\
 	pixman-access.c				\
 	pixman-access-accessors.c		\
+	pixman-color-space.c			\
 	pixman-cpu.c				\
 	pixman-gradient-walker.c		\
 	pixman-region16.c			\
diff --git a/pixman/pixman-color-space.c b/pixman/pixman-color-space.c
new file mode 100644
index 0000000..5cbd453
--- /dev/null
+++ b/pixman/pixman-color-space.c
@@ -0,0 +1,138 @@
+/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <assert.h>
+
+#include "pixman-private.h"
+
+
+const pixman_color_space_t _pixman_color_space_device_gray = {
+    PIXMAN_REFERENCE_COUNT_INVALID,
+    1
+};
+
+const pixman_color_space_t _pixman_color_space_device_rgb = {
+    PIXMAN_REFERENCE_COUNT_INVALID,
+    3
+};
+
+const pixman_color_space_t _pixman_color_space_device_cmyk = {
+    PIXMAN_REFERENCE_COUNT_INVALID,
+    4
+};
+
+static void
+_pixman_color_space_init (pixman_color_space_t *color_space,
+			  void *profile_data,
+			  unsigned long profile_len)
+{
+    color_space->ref_count = 0;
+    color_space->profile_data = profile_data;
+    color_space->profile_len = profile_len;
+}
+
+PIXMAN_EXPORT pixman_color_space_t *
+pixman_color_space_create_icc (const void *profile, unsigned long profile_len)
+{
+    pixman_color_space_t *color_space;
+
+    color_space = malloc (sizeof (pixman_color_space_t) + profile_len);
+    if (color_space == NULL)
+	return NULL;
+
+    memcpy (color_space + 1, profile, profile_len);
+
+    _pixman_color_space_init (color_space, color_space + 1, profile_len);
+
+    color_space->ref_count = 1;
+
+    return color_space;
+}
+
+/**
+ * pixman_color_space_ref:
+ * @color_space: a #pixman_color_space_t
+ *
+ * Increases the reference count on @color_space by one. This prevents
+ * @color_space from being destroyed until a matching call to
+ * pixman_color_space_unref() is made.
+ *
+ * Return value: the referenced #pixman_color_space_t.
+ **/
+PIXMAN_EXPORT pixman_color_space_t *
+pixman_color_space_ref (pixman_color_space_t *color_space)
+{
+    if (color_space == NULL ||
+	simpleops_atomic_int_get (&color_space->ref_count) == PIXMAN_REFERENCE_COUNT_INVALID)
+	return color_space;
+
+    simpleops_atomic_int_inc_and_get (&color_space->ref_count);
+
+    return color_space;
+}
+
+/**
+ * pixman_color_space_unref:
+ * @color_space: a #pixman_color_space_t
+ *
+ * Decreases the reference count on @color_space by one. If the result is
+ * zero, then @color_space and all associated resources are freed.  See
+ * pixman_color_space_ref().
+ **/
+PIXMAN_EXPORT pixman_bool_t
+pixman_color_space_unref (pixman_color_space_t *color_space)
+{
+    if (color_space == NULL ||
+	simpleops_atomic_int_get (&color_space->ref_count) == PIXMAN_REFERENCE_COUNT_INVALID)
+	return FALSE;
+
+    if (! simpleops_atomic_int_dec_and_test (&color_space->ref_count))
+	return FALSE;
+
+    free (color_space);
+
+    return TRUE;
+}
+
+/**
+ * pixman_color_space_get_num_components:
+ * @color_space: a #pixman_color_space_t
+ *
+ * Returns the number of components of @color_space.
+ *
+ * Return value: the number of components of @color_space.  If the
+ * object is NULL, 0 will be returned.
+ **/
+PIXMAN_EXPORT unsigned int
+pixman_color_space_get_num_components (const pixman_color_space_t *color_space)
+{
+    if (color_space == NULL)
+	return 0;
+
+    return color_space->n_components;
+}
+
+pixman_color_space_t *
+_pixman_color_space_from_pixman_format (pixman_format_code_t pixman_format)
+{
+    switch (PIXMAN_FORMAT_TYPE (pixman_format)) {
+    case PIXMAN_TYPE_ARGB:
+    case PIXMAN_TYPE_ABGR:
+    case PIXMAN_TYPE_BGRA:
+	return (pixman_color_space_t *) &_pixman_color_space_device_rgb;
+
+    case PIXMAN_TYPE_A:
+	return NULL;
+
+    case PIXMAN_TYPE_GRAY:
+	return (pixman_color_space_t *) &_pixman_color_space_device_gray;
+
+    default:
+	assert (0);
+	return NULL;
+    }
+}
diff --git a/pixman/pixman-private.h b/pixman/pixman-private.h
index 7e03043..3fdfe2e 100644
--- a/pixman/pixman-private.h
+++ b/pixman/pixman-private.h
@@ -18,6 +18,18 @@
 #include "pixman-compiler.h"
 #include "simpleops/atomic/simpleops-atomic.h"
 
+#define PIXMAN_REFERENCE_COUNT_INVALID -1
+
+#define MAX_COMPONENTS 16
+
+struct pixman_color_space {
+    int32_t ref_count;
+    unsigned int n_components;
+    void *profile_data;
+    unsigned long profile_len;
+    /* mime data? */
+};
+
 /*
  * Images
  */
diff --git a/pixman/pixman.h b/pixman/pixman.h
index 8fdb12c..08e0c4e 100644
--- a/pixman/pixman.h
+++ b/pixman/pixman.h
@@ -184,6 +184,7 @@ struct pixman_transform
 /* forward declaration (sorry) */
 struct pixman_box16;
 typedef  union pixman_image		pixman_image_t;
+typedef  struct pixman_color_space      pixman_color_space_t;
 
 void          pixman_transform_init_identity    (struct pixman_transform       *matrix);
 pixman_bool_t pixman_transform_point_3d         (const struct pixman_transform *transform,
@@ -952,6 +953,20 @@ void           pixman_rasterize_trapezoid  (pixman_image_t            *image,
 					    int                        x_off,
 					    int                        y_off);
 
+
+pixman_color_space_t *
+pixman_color_space_create_icc (const void *profile, unsigned long profile_len);
+
+pixman_color_space_t *
+pixman_color_space_ref (pixman_color_space_t *color_space);
+
+pixman_bool_t
+pixman_color_space_unref (pixman_color_space_t *color_space);
+
+unsigned int
+pixman_color_space_get_num_components (const pixman_color_space_t *color_space);
+
+
 PIXMAN_END_DECLS
 
 #endif /* PIXMAN_H__ */