1 files changed, 41 insertions, 5 deletions
diff --git a/gragl.h b/gragl.h
index 6c6c8a7..b0082cb 100644
--- a/gragl.h
+++ b/gragl.h
@@ -1,6 +1,35 @@
 #ifndef GRAGL_H
 #define GRAGL_H
 
+#include <stdint.h>
+
+typedef float ConstColor[];
+typedef float *Color;
+
+#define PLOT_AUTO(plot) { .function = plot, .nfuncs = sizeof(plot) / sizeof(Function),  .x = 3, .y = 0, .rsize = 5, .step = 0.001 }
+#define FUNC_AUTO(f) { .func = f, .color = AUTO_COLORS[(auto_color_index = (auto_color_index + 1) % 5)], .width = 3 }
+
+static ConstColor COLOR_RED    = { 0.800f, 0.140f, 0.120f, 1.0f };
+static ConstColor COLOR_GREEN  = { 0.596f, 0.592f, 0.102f, 1.0f };
+static ConstColor COLOR_YELLOW = { 0.843f, 0.600f, 0.129f, 1.0f };
+static ConstColor COLOR_BLUE   = { 0.271f, 0.522f, 0.533f, 1.0f };
+static ConstColor COLOR_PURPLE = { 0.694f, 0.384f, 0.525f, 1.0f };
+static ConstColor COLOR_AQUA   = { 0.408f, 0.616f, 0.416f, 1.0f };
+static ConstColor COLOR_BLACK  = { 0.157f, 0.157f, 0.157f, 1.0f };
+static ConstColor COLOR_DARKER = { 0.114f, 0.125f, 0.129f, 1.0f };
+static ConstColor COLOR_WHITE  = { 0.922f, 0.859f, 0.698f, 1.0f };
+static ConstColor COLOR_GRAY   = { 0.659f, 0.600f, 0.518f, 1.0f };
+
+static unsigned auto_color_index = 0;
+static Color AUTO_COLORS[] = {
+	COLOR_RED,
+	COLOR_GREEN,
+	COLOR_YELLOW,
+	COLOR_BLUE,
+	COLOR_PURPLE,
+	COLOR_AQUA
+};
+
 typedef struct {
 	double x;
 	double y;
@@ -8,17 +37,24 @@ typedef struct {
 
 typedef struct {
 	double v;
-	char valid;
+	uint8_t valid;
 } Scalar;
 
 typedef struct {
+	Scalar (*func)(double);
+	Color color;
+	double width;
+} Function;
+
+typedef struct {
 	unsigned width;
 	unsigned height;
-	Scalar (*func)(double);
-	unsigned n_func;
-	double from;
-	double to;
+	double x;
+	double y;
+	double rsize;
 	double step;
+	Function *function;
+	unsigned nfuncs;
 } Plot2d;
 
 typedef struct {