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LibGL: Implement glMultMatrixf

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This commit is contained in:
Jelle Raaijmakers 2021-12-01 13:27:24 +01:00 • committed by Andreas Kling
parent 40724a426f
commit 7ac8cd057e
5 changed files with 48 additions and 13 deletions
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24
Userland/Libraries/LibGL/GLMat.cpp
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@ -35,18 +35,28 @@ void glPopMatrix()
g_gl_context->gl_pop_matrix();
}
void glLoadMatrixf(const GLfloat* matrix)
/*
* Transposes input matrices (column-major) to our Matrix (row-major).
*/
template<typename T>
static constexpr Matrix4x4<T> transpose_input_matrix(T const* matrix)
{
// Transpose the matrix here because glLoadMatrix expects elements
// in column major order but out Matrix class stores elements in
// row major order.
FloatMatrix4x4 mat(
return {
matrix[0], matrix[4], matrix[8], matrix[12],
matrix[1], matrix[5], matrix[9], matrix[13],
matrix[2], matrix[6], matrix[10], matrix[14],
matrix[3], matrix[7], matrix[11], matrix[15]);
matrix[3], matrix[7], matrix[11], matrix[15],
};
}
g_gl_context->gl_load_matrix(mat);
void glMultMatrixf(GLfloat const* matrix)
{
g_gl_context->gl_mult_matrix(transpose_input_matrix<float>(matrix));
}
void glLoadMatrixf(const GLfloat* matrix)
{
g_gl_context->gl_load_matrix(transpose_input_matrix<float>(matrix));
}
void glLoadIdentity()