Add module spec headers

Signed-off-by: pacien <pacien.trangirard@pacien.net>

3 files changed, 148 insertions, 0 deletions

diff --git a/include/blender/blender.h b/include/blender/blender.h
new file mode 100644
index 0000000..356c68e
--- /dev/null
+++ b/include/blender/blender.h
@@ -0,0 +1,42 @@
+#ifndef UPEM_MORPHING_BLENDER
+#define UPEM_MORPHING_BLENDER
+
+/**
+ * File: blender.h
+ * Will it blend? That is the question.
+ */
+
+#include "common/time.h"
+#include "blender/canvas.h"
+#include "blender/color.h"
+#include "morpher/morpher.h"
+
+/**
+ * Function: blender_blend_canvas
+ * Blends two canvas by applying the given morphing at the requested time frame.
+ *
+ * Parameters:
+ *   *canvas   - pointer to the canvas to paint
+ *   *source   - source image
+ *   *target   - target image
+ *   *morphing - morphing transform to apply
+ *   frame     - the interpolation distance from the origin canvas [0;1]
+ */
+void blender_blend_canvas(Canvas *canvas, Canvas *source, Canvas *target, Morphing *morphing, TimeVector frame);
+
+/**
+ * Function: blender_blend_colors
+ * Properly blends two coloured pixels, interpolated at the given time frame.
+ * (https://www.youtube.com/watch?v=LKnqECcg6Gw)
+ *
+ * Parameters:
+ *   origin - the origin colour
+ *   target - the target colour
+ *   frame  - the interpolation distance from the origin colour [0;1]
+ *
+ * Returns:
+ *   The blended coloured pixel
+ */
+Color blender_blend_colors(Color origin, Color target, TimeVector frame);
+
+#endif
diff --git a/include/blender/canvas.h b/include/blender/canvas.h
new file mode 100644
index 0000000..12f7ce1
--- /dev/null
+++ b/include/blender/canvas.h
@@ -0,0 +1,79 @@
+#ifndef UPEM_MORPHING_CANVAS
+#define UPEM_MORPHING_CANVAS
+
+/**
+ * File: canvas.h
+ *
+ * See also:
+ *   Freedom, according to Bob Ross
+ */
+
+#include <MLV_image.h>
+#include "common/geom.h"
+#include "color.h"
+
+/**
+ * Type: Canvas
+ * Represents a fixed size RGBa pixel matrix.
+ */
+typedef struct {
+  MLV_Image mlv;
+} Canvas;
+
+/**
+ * Function: canvas_init
+ * Initialises a canvas of the given size
+ *
+ * Parameters:
+ *   *canvas - the canvas to initialise
+ *   width   - the width in pixels
+ *   height  - the height in pixels
+ */
+void canvas_init(Canvas *canvas, IntVector width, IntVector height);
+
+/**
+ * Function: canvas_free
+ * Frees all memory allocated to a canvas.
+ *
+ * Parameters:
+ *   *canvas - the canvas to destroy
+ */
+void canvas_free(Canvas *canvas);
+
+/**
+ * Function: canvas_set_pixel
+ * Sets the pixel colour at the given coordinates.
+ *
+ * Parameters:
+ *   *canvas  - the canvas to alter
+ *   position - the cartesian coordinates of the pixel to set
+ *   color    - the new colour to set
+ */
+void canvas_set_pixel(Canvas *canvas, CartesianVector position, Color color);
+
+/**
+ * Function: canvas_get_pixel
+ * Returns the colour of the pixel at the given position.
+ *
+ * Parameters:
+ *   *canvas - the base canvas
+ *   position - the position in cartesian coordinates
+ *
+ * Returns:
+ *   The colour of the requested pixel
+ */
+Color canvas_get_pixel(Canvas *canvas, CartesianVector position);
+
+/**
+ * Function: canvas_get_size
+ * Returns the size (in pixels) of the given canvas.
+ *
+ * Parameters:
+ *   *canvas - the canvas
+ *
+ * Returns:
+ *   The size of the canvas
+ */
+CartesianVector canvas_get_size(Canvas *canvas);
+
+#endif
diff --git a/include/blender/color.h b/include/blender/color.h
new file mode 100644
index 0000000..cdf488a
--- /dev/null
+++ b/include/blender/color.h
@@ -0,0 +1,27 @@
+#ifndef UPEM_MORPHING_COLOR
+#define UPEM_MORPHING_COLOR
+
+/**
+ * File: color.h
+ *
+ * See also:
+ *   A rainbow
+ */
+
+/**
+ * Type: ColorComponent
+ * Represents a single colour component of 32-bits RGBa tuple.
+ */
+typedef uint8_t ColorComponent;
+
+/**
+ * Type: ColorPixel
+ * Represents a single RGBa coloured pixel.
+ * Compatible with the libMLV representation.
+ */
+typedef union {
+  ColorComponent r, g, b, a;
+  MLV_Color mlv;
+} Color;
+
+#endif