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#include "Math.hpp"
#include <unordered_map>
#include <cstring>
Hyprutils::Math::eTransform wlTransformToHyprutils(wl_output_transform t) {
switch (t) {
case WL_OUTPUT_TRANSFORM_NORMAL: return Hyprutils::Math::eTransform::HYPRUTILS_TRANSFORM_NORMAL;
case WL_OUTPUT_TRANSFORM_180: return Hyprutils::Math::eTransform::HYPRUTILS_TRANSFORM_180;
case WL_OUTPUT_TRANSFORM_90: return Hyprutils::Math::eTransform::HYPRUTILS_TRANSFORM_90;
case WL_OUTPUT_TRANSFORM_270: return Hyprutils::Math::eTransform::HYPRUTILS_TRANSFORM_270;
case WL_OUTPUT_TRANSFORM_FLIPPED: return Hyprutils::Math::eTransform::HYPRUTILS_TRANSFORM_FLIPPED;
case WL_OUTPUT_TRANSFORM_FLIPPED_180: return Hyprutils::Math::eTransform::HYPRUTILS_TRANSFORM_FLIPPED_180;
case WL_OUTPUT_TRANSFORM_FLIPPED_270: return Hyprutils::Math::eTransform::HYPRUTILS_TRANSFORM_FLIPPED_270;
case WL_OUTPUT_TRANSFORM_FLIPPED_90: return Hyprutils::Math::eTransform::HYPRUTILS_TRANSFORM_FLIPPED_90;
default: break;
}
return Hyprutils::Math::eTransform::HYPRUTILS_TRANSFORM_NORMAL;
}
static void matrixIdentity(float mat[9]) {
static const float identity[9] = {
1.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
};
memcpy(mat, identity, sizeof(identity));
}
static void matrixMultiply(float mat[9], const float a[9], const float b[9]) {
float product[9];
product[0] = a[0] * b[0] + a[1] * b[3] + a[2] * b[6];
product[1] = a[0] * b[1] + a[1] * b[4] + a[2] * b[7];
product[2] = a[0] * b[2] + a[1] * b[5] + a[2] * b[8];
product[3] = a[3] * b[0] + a[4] * b[3] + a[5] * b[6];
product[4] = a[3] * b[1] + a[4] * b[4] + a[5] * b[7];
product[5] = a[3] * b[2] + a[4] * b[5] + a[5] * b[8];
product[6] = a[6] * b[0] + a[7] * b[3] + a[8] * b[6];
product[7] = a[6] * b[1] + a[7] * b[4] + a[8] * b[7];
product[8] = a[6] * b[2] + a[7] * b[5] + a[8] * b[8];
memcpy(mat, product, sizeof(product));
}
static void matrixTranspose(float mat[9], const float a[9]) {
float transposition[9] = {
a[0], a[3], a[6], a[1], a[4], a[7], a[2], a[5], a[8],
};
memcpy(mat, transposition, sizeof(transposition));
}
static void matrixTranslate(float mat[9], float x, float y) {
float translate[9] = {
1.0f, 0.0f, x, 0.0f, 1.0f, y, 0.0f, 0.0f, 1.0f,
};
matrixMultiply(mat, mat, translate);
}
static void matrixScale(float mat[9], float x, float y) {
float scale[9] = {
x, 0.0f, 0.0f, 0.0f, y, 0.0f, 0.0f, 0.0f, 1.0f,
};
matrixMultiply(mat, mat, scale);
}
static void matrixRotate(float mat[9], float rad) {
float rotate[9] = {
cos(rad), -sin(rad), 0.0f, sin(rad), cos(rad), 0.0f, 0.0f, 0.0f, 1.0f,
};
matrixMultiply(mat, mat, rotate);
}
static std::unordered_map<eTransform, std::array<float, 9>> transforms = {
{HYPRUTILS_TRANSFORM_NORMAL,
{
1.0f,
0.0f,
0.0f,
0.0f,
1.0f,
0.0f,
0.0f,
0.0f,
1.0f,
}},
{HYPRUTILS_TRANSFORM_90,
{
0.0f,
1.0f,
0.0f,
-1.0f,
0.0f,
0.0f,
0.0f,
0.0f,
1.0f,
}},
{HYPRUTILS_TRANSFORM_180,
{
-1.0f,
0.0f,
0.0f,
0.0f,
-1.0f,
0.0f,
0.0f,
0.0f,
1.0f,
}},
{HYPRUTILS_TRANSFORM_270,
{
0.0f,
-1.0f,
0.0f,
1.0f,
0.0f,
0.0f,
0.0f,
0.0f,
1.0f,
}},
{HYPRUTILS_TRANSFORM_FLIPPED,
{
-1.0f,
0.0f,
0.0f,
0.0f,
1.0f,
0.0f,
0.0f,
0.0f,
1.0f,
}},
{HYPRUTILS_TRANSFORM_FLIPPED_90,
{
0.0f,
1.0f,
0.0f,
1.0f,
0.0f,
0.0f,
0.0f,
0.0f,
1.0f,
}},
{HYPRUTILS_TRANSFORM_FLIPPED_180,
{
1.0f,
0.0f,
0.0f,
0.0f,
-1.0f,
0.0f,
0.0f,
0.0f,
1.0f,
}},
{HYPRUTILS_TRANSFORM_FLIPPED_270,
{
0.0f,
-1.0f,
0.0f,
-1.0f,
0.0f,
0.0f,
0.0f,
0.0f,
1.0f,
}},
};
static void matrixTransform(float mat[9], eTransform transform) {
matrixMultiply(mat, mat, transforms.at(transform).data());
}
static void matrixProjection(float mat[9], int width, int height, eTransform transform) {
memset(mat, 0, sizeof(*mat) * 9);
const float* t = transforms.at(transform).data();
float x = 2.0f / width;
float y = 2.0f / height;
// Rotation + reflection
mat[0] = x * t[0];
mat[1] = x * t[1];
mat[3] = y * -t[3];
mat[4] = y * -t[4];
// Translation
mat[2] = -copysign(1.0f, mat[0] + mat[1]);
mat[5] = -copysign(1.0f, mat[3] + mat[4]);
// Identity
mat[8] = 1.0f;
}
void projectBox(float mat[9], CBox& box, eTransform transform, float rotation, const float projection[9]) {
double x = box.x;
double y = box.y;
double width = box.width;
double height = box.height;
matrixIdentity(mat);
matrixTranslate(mat, x, y);
if (rotation != 0) {
matrixTranslate(mat, width / 2, height / 2);
matrixRotate(mat, rotation);
matrixTranslate(mat, -width / 2, -height / 2);
}
matrixScale(mat, width, height);
if (transform != HYPRUTILS_TRANSFORM_NORMAL) {
matrixTranslate(mat, 0.5, 0.5);
matrixTransform(mat, transform);
matrixTranslate(mat, -0.5, -0.5);
}
matrixMultiply(mat, projection, mat);
}
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