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opengl: properly combine transforms in renderTexture

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ref #12666
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Vaxry 2025-12-27 20:18:50 +01:00
parent e5f22c06b4
commit 610c59dc34
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GPG key ID: 665806380871D640
3 changed files with 79 additions and 15 deletions
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82
src/helpers/math/Math.cpp
View file

@ -1,19 +1,37 @@
#include "Math.hpp"
#include "../memory/Memory.hpp"
#include "../../macros.hpp"
Hyprutils::Math::eTransform Math::wlTransformToHyprutils(wl_output_transform t) {
#include <unordered_map>
#include <array>
using namespace Math;
// FIXME: expose in hu
static std::unordered_map<eTransform, Mat3x3> transforms = {
{HYPRUTILS_TRANSFORM_NORMAL, std::array<float, 9>{1.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f}},
{HYPRUTILS_TRANSFORM_90, std::array<float, 9>{0.0f, 1.0f, 0.0f, -1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f}},
{HYPRUTILS_TRANSFORM_180, std::array<float, 9>{-1.0f, 0.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f}},
{HYPRUTILS_TRANSFORM_270, std::array<float, 9>{0.0f, -1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f}},
{HYPRUTILS_TRANSFORM_FLIPPED, std::array<float, 9>{-1.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f}},
{HYPRUTILS_TRANSFORM_FLIPPED_90, std::array<float, 9>{0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f}},
{HYPRUTILS_TRANSFORM_FLIPPED_180, std::array<float, 9>{1.0f, 0.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f}},
{HYPRUTILS_TRANSFORM_FLIPPED_270, std::array<float, 9>{0.0f, -1.0f, 0.0f, -1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f}},
};
eTransform Math::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;
case WL_OUTPUT_TRANSFORM_NORMAL: return eTransform::HYPRUTILS_TRANSFORM_NORMAL;
case WL_OUTPUT_TRANSFORM_180: return eTransform::HYPRUTILS_TRANSFORM_180;
case WL_OUTPUT_TRANSFORM_90: return eTransform::HYPRUTILS_TRANSFORM_90;
case WL_OUTPUT_TRANSFORM_270: return eTransform::HYPRUTILS_TRANSFORM_270;
case WL_OUTPUT_TRANSFORM_FLIPPED: return eTransform::HYPRUTILS_TRANSFORM_FLIPPED;
case WL_OUTPUT_TRANSFORM_FLIPPED_180: return eTransform::HYPRUTILS_TRANSFORM_FLIPPED_180;
case WL_OUTPUT_TRANSFORM_FLIPPED_270: return eTransform::HYPRUTILS_TRANSFORM_FLIPPED_270;
case WL_OUTPUT_TRANSFORM_FLIPPED_90: return eTransform::HYPRUTILS_TRANSFORM_FLIPPED_90;
default: break;
}
return Hyprutils::Math::eTransform::HYPRUTILS_TRANSFORM_NORMAL;
return eTransform::HYPRUTILS_TRANSFORM_NORMAL;
}
wl_output_transform Math::invertTransform(wl_output_transform tr) {
@ -22,3 +40,47 @@ wl_output_transform Math::invertTransform(wl_output_transform tr) {
return tr;
}
static bool matEq(const Mat3x3& a, const Mat3x3& b) {
for (size_t i = 0; i < 9; ++i) {
const float Δ = std::fabs(a.getMatrix()[i] - b.getMatrix()[i]);
if (Δ > 1e-6) // eps
return false;
}
return true;
}
static eTransform composeInternal(eTransform a, eTransform b) {
const auto& A = transforms.at(a);
const auto& B = transforms.at(b);
const auto RESULT = Mat3x3{A}.multiply(B);
for (const auto& [t, M] : transforms) {
if (matEq(M, RESULT))
return t;
}
return eTransform::HYPRUTILS_TRANSFORM_NORMAL;
}
eTransform Math::composeTransform(eTransform a, eTransform b) {
static std::array<std::array<eTransform, 8>, 8> lookup;
static bool once = true;
if (once) {
once = false;
// bake the composition table
static_assert(HYPRUTILS_TRANSFORM_FLIPPED_270 == 7);
for (size_t i = 0; i <= HYPRUTILS_TRANSFORM_FLIPPED_270 /* 7 */; ++i) {
for (size_t j = 0; j <= HYPRUTILS_TRANSFORM_FLIPPED_270 /* 7 */; ++j) {
lookup[i][j] = composeInternal(sc<eTransform>(i), sc<eTransform>(j));
}
}
}
RASSERT(a >= HYPRUTILS_TRANSFORM_NORMAL && a <= HYPRUTILS_TRANSFORM_FLIPPED_270, "Invalid transform a in composeTransform");
RASSERT(b >= HYPRUTILS_TRANSFORM_NORMAL && b <= HYPRUTILS_TRANSFORM_FLIPPED_270, "Invalid transform b in composeTransform");
return lookup[a][b];
}

3
src/helpers/math/Math.hpp
View file

@ -14,4 +14,5 @@ namespace Math {
eTransform wlTransformToHyprutils(wl_output_transform t);
wl_output_transform invertTransform(wl_output_transform tr);
}
eTransform composeTransform(eTransform a, eTransform b);
}