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-rw-r--r--src/custom_elements.c255
1 files changed, 255 insertions, 0 deletions
diff --git a/src/custom_elements.c b/src/custom_elements.c
new file mode 100644
index 0000000..23a9824
--- /dev/null
+++ b/src/custom_elements.c
@@ -0,0 +1,255 @@
+#include "custom_elements.h"
+
+#include "sokol/sokol_gfx.h"
+#include "sokol/sokol_gl.h"
+#include <stdio.h>
+#include <math.h>
+
+#define STEP_AMOUNT 128
+
+typedef struct {
+ float x;
+ float y;
+} Vec2;
+
+static float _SIN_FULL[128] = {
+ 0.000000f, 0.049068f, 0.098017f, 0.146730f,
+ 0.195090f, 0.242980f, 0.290285f, 0.336890f,
+ 0.382683f, 0.427555f, 0.471397f, 0.514103f,
+ 0.555570f, 0.595699f, 0.634393f, 0.671559f,
+ 0.707107f, 0.740951f, 0.773010f, 0.803208f,
+ 0.831470f, 0.857729f, 0.881921f, 0.903989f,
+ 0.923880f, 0.941544f, 0.956940f, 0.970031f,
+ 0.980785f, 0.989177f, 0.995185f, 0.998795f,
+ 1.000000f, 0.998795f, 0.995185f, 0.989177f,
+ 0.980785f, 0.970031f, 0.956940f, 0.941544f,
+ 0.923880f, 0.903989f, 0.881921f, 0.857729f,
+ 0.831470f, 0.803208f, 0.773010f, 0.740951f,
+ 0.707107f, 0.671559f, 0.634393f, 0.595699f,
+ 0.555570f, 0.514103f, 0.471397f, 0.427555f,
+ 0.382683f, 0.336890f, 0.290285f, 0.242980f,
+ 0.195090f, 0.146730f, 0.098017f, 0.049068f,
+ 0.000000f, -0.049068f, -0.098017f, -0.146730f,
+ -0.195090f, -0.242980f, -0.290285f, -0.336890f,
+ -0.382683f, -0.427555f, -0.471397f, -0.514103f,
+ -0.555570f, -0.595699f, -0.634393f, -0.671559f,
+ -0.707107f, -0.740951f, -0.773010f, -0.803208f,
+ -0.831470f, -0.857729f, -0.881921f, -0.903989f,
+ -0.923880f, -0.941544f, -0.956940f, -0.970031f,
+ -0.980785f, -0.989177f, -0.995185f, -0.998795f,
+ -1.000000f, -0.998795f, -0.995185f, -0.989177f,
+ -0.980785f, -0.970031f, -0.956940f, -0.941544f,
+ -0.923880f, -0.903989f, -0.881921f, -0.857729f,
+ -0.831470f, -0.803208f, -0.773010f, -0.740951f,
+ -0.707107f, -0.671559f, -0.634393f, -0.595699f,
+ -0.555570f, -0.514103f, -0.471397f, -0.427555f,
+ -0.382683f, -0.336890f, -0.290285f, -0.242980f,
+ -0.195090f, -0.146730f, -0.098017f, -0.049068f,
+};
+
+static float _COS_FULL[128] = {
+ 1.000000f, 0.998795f, 0.995185f, 0.989177f,
+ 0.980785f, 0.970031f, 0.956940f, 0.941544f,
+ 0.923880f, 0.903989f, 0.881921f, 0.857729f,
+ 0.831470f, 0.803208f, 0.773010f, 0.740951f,
+ 0.707107f, 0.671559f, 0.634393f, 0.595699f,
+ 0.555570f, 0.514103f, 0.471397f, 0.427555f,
+ 0.382683f, 0.336890f, 0.290285f, 0.242980f,
+ 0.195090f, 0.146730f, 0.098017f, 0.049068f,
+ 0.000000f, -0.049068f, -0.098017f, -0.146730f,
+ -0.195090f, -0.242980f, -0.290285f, -0.336890f,
+ -0.382683f, -0.427555f, -0.471397f, -0.514103f,
+ -0.555570f, -0.595699f, -0.634393f, -0.671559f,
+ -0.707107f, -0.740951f, -0.773010f, -0.803208f,
+ -0.831470f, -0.857729f, -0.881921f, -0.903989f,
+ -0.923880f, -0.941544f, -0.956940f, -0.970031f,
+ -0.980785f, -0.989177f, -0.995185f, -0.998795f,
+ -1.000000f, -0.998795f, -0.995185f, -0.989177f,
+ -0.980785f, -0.970031f, -0.956940f, -0.941544f,
+ -0.923880f, -0.903989f, -0.881921f, -0.857729f,
+ -0.831470f, -0.803208f, -0.773010f, -0.740951f,
+ -0.707107f, -0.671559f, -0.634393f, -0.595699f,
+ -0.555570f, -0.514103f, -0.471397f, -0.427555f,
+ -0.382683f, -0.336890f, -0.290285f, -0.242980f,
+ -0.195090f, -0.146730f, -0.098017f, -0.049068f,
+ -0.000000f, 0.049068f, 0.098017f, 0.146730f,
+ 0.195090f, 0.242980f, 0.290285f, 0.336890f,
+ 0.382683f, 0.427555f, 0.471397f, 0.514103f,
+ 0.555570f, 0.595699f, 0.634393f, 0.671559f,
+ 0.707107f, 0.740951f, 0.773010f, 0.803208f,
+ 0.831470f, 0.857729f, 0.881921f, 0.903989f,
+ 0.923880f, 0.941544f, 0.956940f, 0.970031f,
+ 0.980785f, 0.989177f, 0.995185f, 0.998795f,
+};
+
+static float STEP = (float)STEP_AMOUNT / 360.0f;
+
+
+static void draw_thick_line(float x1, float y1, float x2, float y2, float thickness) {
+ float rad = atan2f(y2 - y1, x2 - x1);
+
+ float xoffset = -1 * thickness * sinf(rad);
+ if (rad < 0) {
+ xoffset *= -1;
+ }
+ float yoffset = thickness * cosf(rad);
+ if (rad < 0) {
+ yoffset *= -1;
+ }
+
+ /* float xoffset = sqrtf(powf(thickness, 2) * (1.0f - powf(sinf(M_PI / 2 - rad), 2))); */
+ /* float yoffset = thickness * sinf(M_PI / 2 - rad); */
+ /* /\* if (rad < 0) { *\/ */
+ /* xoffset *= -1; */
+ /* yoffset *= -1; */
+ /* } */
+ /* printf("rad: %f, x: %f, y: %f\n", rad, xoffset, yoffset); */
+
+ float x1top = x1 - xoffset;
+ float y1top = y1 - yoffset;
+
+ float x2top = x2 - xoffset;
+ float y2top = y2 - yoffset;
+
+ float x1bottom = x1 + xoffset;
+ float y1bottom = y1 + yoffset;
+
+ float x2bottom = x2 + xoffset;
+ float y2bottom = y2 + yoffset;
+ /* printf("1t: (%f %f) 2t: (%f %f)\n" */
+ /* "1b: (%f %f) 2b: (%f %f)\n", */
+ /* x1top, y1top, */
+ /* x2top, y2top, */
+ /* x1bottom, y1bottom, */
+ /* x2bottom, y2bottom), */
+
+ sgl_v2f(x1top, y1top);
+ sgl_v2f(x1top, y1top);
+ sgl_v2f(x2top, y2top);
+ sgl_v2f(x1bottom, y1bottom);
+ sgl_v2f(x2bottom, y2bottom);
+ sgl_v2f(x2bottom, y2bottom);
+}
+
+static void draw_wave_screen(float x, float y, float h, float w, float *points, size_t len) {
+ float samples_per_px = (float)len / w;
+
+ float last_point = y + points[0] * h;
+ for (int px = 1; px < (int)w; px++) {
+ size_t start = (size_t)(px * samples_per_px);
+ size_t end = (size_t)((px + 1) * samples_per_px);
+ if (end >= len) end = len - 1;
+
+ float minv = 1.0f, maxv = -1.0f;
+ for (size_t i = start; i <= end; i++) {
+ if (points[i] < minv) minv = points[i];
+ if (points[i] > maxv) maxv = points[i];
+ }
+
+ float y_min = y + h * (0.5f - 0.5f * maxv);
+ float y_max = y + h * (0.5f - 0.5f * minv);
+
+ if (y_min == y_max) {
+ printf("%d %f %d %f\n", x + px - 1, last_point, x + px, y_max);
+ draw_thick_line(x + px - 1, last_point, x + px, y_max, 5);
+ last_point = y_max;
+ }
+ }
+}
+
+static void draw_circle(float x, float y, float h, float w, float start_angle, float end_angle) {
+ float c_x = x + w / 2;
+ float c_y = y + h / 2;
+ float r = w > h ? h : w;
+ r /= 2.0f;
+
+ float rad_start = start_angle * (M_PI / 180.0f);
+ float rad_end = end_angle * (M_PI / 180.0f);
+ /* draw_thick_line(c_x, c_y, c_x+(r*cosf(rad_end)), c_y+(r*sinf(rad_end)), 5); */
+
+ int segments = (int)(r * 1.5f);
+ if (segments < 16) {
+ segments = 16;
+ }
+ float angle_step = (rad_end - rad_start) / ((float)segments - 1);
+ float angle;
+
+ sgl_v2f(c_x, c_y);
+ for (int i = 0; i < segments; i++) {
+ angle = rad_start + angle_step * (float)i;
+ sgl_v2f(c_x, c_y);
+ sgl_v2f(c_x+(r*cosf(angle)), c_y+(r*sinf(angle)));
+ }
+ sgl_v2f(c_x+(r*cos(angle)), c_y+(r*sin(angle)));
+}
+
+static void _draw_circle(float x, float y, float h, float w, float start_angle, float end_angle) {
+ float c_x = x + w / 2;
+ float c_y = y + h / 2;
+ float r = w > h ? h : w;
+ r /= 2.0f;
+
+ int start = start_angle * STEP;
+ int end = end_angle * STEP;
+ int amount;
+ if (end_angle == start_angle) {
+ amount = STEP_AMOUNT;
+ } else {
+ amount = (end - start + STEP_AMOUNT) % STEP_AMOUNT;
+ }
+ int idx = start;
+
+
+ sgl_v2f(c_x, c_y);
+ for (int i = 0; i < amount; i++) {
+ sgl_v2f(c_x, c_y);
+ sgl_v2f(c_x+(r*_COS_FULL[idx]), c_y+(r*_SIN_FULL[idx]));
+ idx++;
+ idx %= STEP_AMOUNT;
+ }
+ sgl_v2f(c_x, c_y);
+ sgl_v2f(c_x+(r*_COS_FULL[idx]), c_y+(r*_SIN_FULL[idx]));
+ sgl_v2f(c_x+(r*_COS_FULL[idx]), c_y+(r*_SIN_FULL[idx]));
+}
+
+void handle_custom(Clay_BoundingBox bbox, Clay_CustomRenderData *config) {
+ CustomElementData *custom_data = config->customData;
+
+ switch (custom_data->type) {
+ case CUSTOM_ELEMENT_TYPE_CIRCLE: {
+ CircleData circle_data = custom_data->circle;
+
+ float start_angle = circle_data.start_angle;
+ /* float end_angle = fmod(circle_data.value * 360 + start_angle + 360, 360); */
+ float end_angle = circle_data.value * 360 + start_angle;
+ end_angle = end_angle > start_angle ? end_angle : end_angle + 360;
+
+ sgl_c4f(config->backgroundColor.r / 255.0f,
+ config->backgroundColor.g / 255.0f,
+ config->backgroundColor.b / 255.0f,
+ config->backgroundColor.a / 255.0f);
+
+ sgl_begin_triangle_strip();
+ draw_circle(bbox.x, bbox.y, bbox.height, bbox.width,
+ start_angle, end_angle);
+ sgl_end();
+ break;
+ }
+ case CUSTOM_ELEMENT_TYPE_WAVE_SCREEN: {
+ WaveScreenData wave_data = custom_data->wave_screen;
+ sgl_c4f(config->backgroundColor.r / 255.0f,
+ config->backgroundColor.g / 255.0f,
+ config->backgroundColor.b / 255.0f,
+ config->backgroundColor.a / 255.0f);
+ sgl_begin_triangle_strip();
+ /* draw_thick_line(bbox.x, bbox.y, */
+ /* bbox.x+bbox.width, bbox.y+bbox.height, */
+ /* 20); */
+ draw_wave_screen(bbox.x, bbox.y,
+ bbox.height, bbox.width,
+ wave_data.point_buffer, wave_data.buffer_len);
+ sgl_end();
+
+ }
+ }
+}
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