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236 lines
5.7 KiB
C++
236 lines
5.7 KiB
C++
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#pragma once
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#include <cstring>
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#include <wayland-client.h>
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#include "../helpers/Box.hpp"
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static enum wl_output_transform wlr_output_transform_invert(enum wl_output_transform tr) {
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if ((tr & WL_OUTPUT_TRANSFORM_90) && !(tr & WL_OUTPUT_TRANSFORM_FLIPPED)) {
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tr = (wl_output_transform)((int)tr ^ (int)WL_OUTPUT_TRANSFORM_180);
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}
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return tr;
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}
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static void wlr_matrix_identity(float mat[9]) {
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const float identity[9] = {
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1.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
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};
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memcpy(mat, identity, sizeof(identity));
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}
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static void wlr_matrix_multiply(float mat[9], const float a[9], const float b[9]) {
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float product[9];
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product[0] = a[0] * b[0] + a[1] * b[3] + a[2] * b[6];
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product[1] = a[0] * b[1] + a[1] * b[4] + a[2] * b[7];
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product[2] = a[0] * b[2] + a[1] * b[5] + a[2] * b[8];
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product[3] = a[3] * b[0] + a[4] * b[3] + a[5] * b[6];
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product[4] = a[3] * b[1] + a[4] * b[4] + a[5] * b[7];
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product[5] = a[3] * b[2] + a[4] * b[5] + a[5] * b[8];
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product[6] = a[6] * b[0] + a[7] * b[3] + a[8] * b[6];
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product[7] = a[6] * b[1] + a[7] * b[4] + a[8] * b[7];
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product[8] = a[6] * b[2] + a[7] * b[5] + a[8] * b[8];
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memcpy(mat, product, sizeof(product));
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}
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static void wlr_matrix_transpose(float mat[9], const float a[9]) {
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float transposition[9] = {
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a[0], a[3], a[6], a[1], a[4], a[7], a[2], a[5], a[8],
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};
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memcpy(mat, transposition, sizeof(transposition));
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}
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static void wlr_matrix_translate(float mat[9], float x, float y) {
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float translate[9] = {
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1.0f, 0.0f, x, 0.0f, 1.0f, y, 0.0f, 0.0f, 1.0f,
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};
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wlr_matrix_multiply(mat, mat, translate);
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}
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static void wlr_matrix_scale(float mat[9], float x, float y) {
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float scale[9] = {
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x, 0.0f, 0.0f, 0.0f, y, 0.0f, 0.0f, 0.0f, 1.0f,
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};
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wlr_matrix_multiply(mat, mat, scale);
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}
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static void wlr_matrix_rotate(float mat[9], float rad) {
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float rotate[9] = {
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cos(rad), -sin(rad), 0.0f, sin(rad), cos(rad), 0.0f, 0.0f, 0.0f, 1.0f,
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};
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wlr_matrix_multiply(mat, mat, rotate);
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}
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static const float transforms[][9] = {
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[WL_OUTPUT_TRANSFORM_NORMAL] =
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{
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1.0f,
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0.0f,
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0.0f,
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0.0f,
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1.0f,
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0.0f,
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0.0f,
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0.0f,
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1.0f,
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},
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[WL_OUTPUT_TRANSFORM_90] =
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{
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0.0f,
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1.0f,
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0.0f,
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-1.0f,
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0.0f,
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0.0f,
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0.0f,
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0.0f,
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1.0f,
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},
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[WL_OUTPUT_TRANSFORM_180] =
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{
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-1.0f,
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0.0f,
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0.0f,
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0.0f,
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-1.0f,
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0.0f,
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0.0f,
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0.0f,
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1.0f,
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},
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[WL_OUTPUT_TRANSFORM_270] =
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{
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0.0f,
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-1.0f,
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0.0f,
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1.0f,
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0.0f,
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0.0f,
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0.0f,
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0.0f,
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1.0f,
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},
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[WL_OUTPUT_TRANSFORM_FLIPPED] =
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{
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-1.0f,
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0.0f,
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0.0f,
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0.0f,
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1.0f,
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0.0f,
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0.0f,
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0.0f,
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1.0f,
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},
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[WL_OUTPUT_TRANSFORM_FLIPPED_90] =
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{
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0.0f,
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1.0f,
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0.0f,
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1.0f,
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0.0f,
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0.0f,
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0.0f,
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0.0f,
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1.0f,
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},
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[WL_OUTPUT_TRANSFORM_FLIPPED_180] =
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{
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1.0f,
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0.0f,
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0.0f,
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0.0f,
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-1.0f,
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0.0f,
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0.0f,
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0.0f,
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1.0f,
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},
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[WL_OUTPUT_TRANSFORM_FLIPPED_270] =
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{
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0.0f,
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-1.0f,
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0.0f,
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-1.0f,
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0.0f,
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0.0f,
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0.0f,
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0.0f,
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1.0f,
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},
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};
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static void wlr_matrix_transform(float mat[9], enum wl_output_transform transform) {
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wlr_matrix_multiply(mat, mat, transforms[transform]);
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}
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static void matrix_projection(float mat[9], int width, int height, enum wl_output_transform transform) {
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std::memset(mat, 0, sizeof(*mat) * 9);
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const float* t = transforms[transform];
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float x = 2.0f / width;
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float y = 2.0f / height;
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// Rotation + reflection
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mat[0] = x * t[0];
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mat[1] = x * t[1];
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mat[3] = y * -t[3];
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mat[4] = y * -t[4];
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// Translation
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mat[2] = -copysign(1.0f, mat[0] + mat[1]);
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mat[5] = -copysign(1.0f, mat[3] + mat[4]);
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// Identity
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mat[8] = 1.0f;
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}
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static void wlr_matrix_project_box(float mat[9], const CBox* box, enum wl_output_transform transform, float rotation, const float projection[9]) {
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int x = box->x;
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int y = box->y;
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int width = box->width;
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int height = box->height;
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wlr_matrix_identity(mat);
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wlr_matrix_translate(mat, x, y);
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if (rotation != 0) {
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wlr_matrix_translate(mat, width / 2, height / 2);
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wlr_matrix_rotate(mat, rotation);
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wlr_matrix_translate(mat, -width / 2, -height / 2);
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}
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wlr_matrix_scale(mat, width, height);
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if (transform != WL_OUTPUT_TRANSFORM_NORMAL) {
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wlr_matrix_translate(mat, 0.5, 0.5);
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wlr_matrix_transform(mat, transform);
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wlr_matrix_translate(mat, -0.5, -0.5);
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}
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wlr_matrix_multiply(mat, projection, mat);
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}
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static void matrixProjection(float mat[9], int w, int h, wl_output_transform tr) {
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memset(mat, 0, sizeof(*mat) * 9);
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const float* t = transforms[tr];
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float x = 2.0f / w;
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float y = 2.0f / h;
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// Rotation + reflection
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mat[0] = x * t[0];
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mat[1] = x * t[1];
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mat[3] = y * t[3];
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mat[4] = y * t[4];
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// Translation
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mat[2] = -copysign(1.0f, mat[0] + mat[1]);
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mat[5] = -copysign(1.0f, mat[3] + mat[4]);
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// Identity
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mat[8] = 1.0f;
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}
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