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LibGL+Lib*GPU: Set model view and projection matrices separately

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LibSoftGPU used to calculate the normal transformation based on the
model view transformation for every primitive, because that's when we
sent over the matrix. By making LibGL a bit smarter and only update the
matrices when they could have changed, we only need to calculate the
normal transformation once on every matrix update.

When viewing `Tuba.obj` in 3DFileViewer, this brings the percentage of
time spent in `FloatMatrix4x4::inverse()` down from 15% to 0%. :^)
This commit is contained in:
Jelle Raaijmakers 2023-10-05 22:01:35 +02:00
parent 126adfc392
commit edcb6176ce
8 changed files with 75 additions and 24 deletions
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5
Userland/Libraries/LibGL/GLContext.h
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@ -242,12 +242,13 @@ public:
void gl_get_program(GLuint program, GLenum pname, GLint* params);
private:
void sync_clip_planes();
void sync_device_config();
void sync_device_sampler_config();
void sync_device_texture_units();
void sync_light_state();
void sync_matrices();
void sync_stencil_configuration();
void sync_clip_planes();
ErrorOr<ByteBuffer> build_extension_string();
@ -298,10 +299,12 @@ private:
Vector<FloatMatrix4x4> m_model_view_matrix_stack { FloatMatrix4x4::identity() };
Vector<FloatMatrix4x4>* m_current_matrix_stack { &m_model_view_matrix_stack };
FloatMatrix4x4* m_current_matrix { &m_current_matrix_stack->last() };
bool m_matrices_dirty { true };
ALWAYS_INLINE void update_current_matrix(FloatMatrix4x4 const& new_matrix)
{
*m_current_matrix = new_matrix;
m_matrices_dirty = true;
if (m_current_matrix_mode == GL_TEXTURE)
m_texture_units_dirty = true;