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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
Notes: sideshowbarker 2024-07-17 07:20:57 +09:00 
Author: https://github.com/gmta
Commit: https://github.com/SerenityOS/serenity/commit/edcb6176ce
Pull-request: https://github.com/SerenityOS/serenity/pull/21349
Reviewed-by: https://github.com/Hendiadyoin1
8 changed files with 75 additions and 24 deletions
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8
Userland/Libraries/LibGL/GLContext.cpp
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@ -169,7 +169,7 @@ void GLContext::gl_end()
VERIFY_NOT_REACHED();
}
m_rasterizer->draw_primitives(primitive_type, model_view_matrix(), projection_matrix(), m_vertex_list);
m_rasterizer->draw_primitives(primitive_type, m_vertex_list);
m_vertex_list.clear_with_capacity();
}
@ -837,7 +837,8 @@ void GLContext::gl_raster_pos(GLfloat x, GLfloat y, GLfloat z, GLfloat w)
APPEND_TO_CALL_LIST_AND_RETURN_IF_NEEDED(gl_raster_pos, x, y, z, w);
RETURN_WITH_ERROR_IF(m_in_draw_state, GL_INVALID_OPERATION);
m_rasterizer->set_raster_position({ x, y, z, w }, model_view_matrix(), projection_matrix());
sync_matrices();
m_rasterizer->set_raster_position({ x, y, z, w });
}
void GLContext::gl_line_width(GLfloat width)
@ -917,11 +918,12 @@ void GLContext::present()
void GLContext::sync_device_config()
{
sync_clip_planes();
sync_device_sampler_config();
sync_device_texture_units();
sync_light_state();
sync_matrices();
sync_stencil_configuration();
sync_clip_planes();
}
ErrorOr<ByteBuffer> GLContext::build_extension_string()

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;

13
Userland/Libraries/LibGL/Matrix.cpp
View File

@ -125,6 +125,7 @@ void GLContext::gl_pop_matrix()
m_current_matrix_stack->take_last();
m_current_matrix = &m_current_matrix_stack->last();
m_matrices_dirty = true;
}
void GLContext::gl_push_matrix()
@ -135,6 +136,7 @@ void GLContext::gl_push_matrix()
m_current_matrix_stack->append(*m_current_matrix);
m_current_matrix = &m_current_matrix_stack->last();
m_matrices_dirty = true;
}
void GLContext::gl_rotate(GLfloat angle, GLfloat x, GLfloat y, GLfloat z)
@ -167,4 +169,15 @@ void GLContext::gl_translate(GLfloat x, GLfloat y, GLfloat z)
update_current_matrix(*m_current_matrix * translation_matrix);
}
void GLContext::sync_matrices()
{
if (!m_matrices_dirty)
return;
m_rasterizer->set_model_view_transform(model_view_matrix());
m_rasterizer->set_projection_transform(projection_matrix());
m_matrices_dirty = false;
}
}

6
Userland/Libraries/LibGPU/Device.h
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@ -39,7 +39,7 @@ public:
virtual DeviceInfo info() const = 0;
virtual void draw_primitives(PrimitiveType, FloatMatrix4x4 const& model_view_transform, FloatMatrix4x4 const& projection_transform, Vector<Vertex>& vertices) = 0;
virtual void draw_primitives(PrimitiveType, Vector<Vertex>& vertices) = 0;
virtual void resize(Gfx::IntSize min_size) = 0;
virtual void clear_color(FloatVector4 const&) = 0;
virtual void clear_depth(DepthType) = 0;
@ -59,6 +59,8 @@ public:
virtual NonnullRefPtr<Image> create_image(PixelFormat const&, u32 width, u32 height, u32 depth, u32 max_levels) = 0;
virtual ErrorOr<NonnullRefPtr<Shader>> create_shader(IR::Shader const&) = 0;
virtual void set_model_view_transform(FloatMatrix4x4 const&) = 0;
virtual void set_projection_transform(FloatMatrix4x4 const&) = 0;
virtual void set_sampler_config(unsigned, SamplerConfig const&) = 0;
virtual void set_light_state(unsigned, Light const&) = 0;
virtual void set_material_state(Face, Material const&) = 0;
@ -68,7 +70,7 @@ public:
virtual RasterPosition raster_position() const = 0;
virtual void set_raster_position(RasterPosition const& raster_position) = 0;
virtual void set_raster_position(FloatVector4 const& position, FloatMatrix4x4 const& model_view_transform, FloatMatrix4x4 const& projection_transform) = 0;
virtual void set_raster_position(FloatVector4 const& position) = 0;
virtual void bind_fragment_shader(RefPtr<Shader>) = 0;
};

32
Userland/Libraries/LibSoftGPU/Device.cpp
View File

@ -952,7 +952,7 @@ void Device::calculate_vertex_lighting(GPU::Vertex& vertex) const
vertex.color.clamp(0.0f, 1.0f);
}
void Device::draw_primitives(GPU::PrimitiveType primitive_type, FloatMatrix4x4 const& model_view_transform, FloatMatrix4x4 const& projection_transform, Vector<GPU::Vertex>& vertices)
void Device::draw_primitives(GPU::PrimitiveType primitive_type, Vector<GPU::Vertex>& vertices)
{
// At this point, the user has effectively specified that they are done with defining the geometry
// of what they want to draw. We now need to do a few things (https://www.khronos.org/opengl/wiki/Rendering_Pipeline_Overview):
@ -967,21 +967,17 @@ void Device::draw_primitives(GPU::PrimitiveType primitive_type, FloatMatrix4x4 c
if (vertices.is_empty())
return;
// Set up normals transform by taking the upper left 3x3 elements from the model view matrix
// See section 2.11.3 of the OpenGL 1.5 spec
auto const normal_transform = model_view_transform.submatrix_from_topleft<3>().transpose().inverse();
// First, transform all vertices
for (auto& vertex : vertices) {
vertex.eye_coordinates = model_view_transform * vertex.position;
vertex.eye_coordinates = m_model_view_transform * vertex.position;
vertex.normal = normal_transform * vertex.normal;
vertex.normal = m_normal_transform * vertex.normal;
if (m_options.normalization_enabled)
vertex.normal.normalize();
calculate_vertex_lighting(vertex);
vertex.clip_coordinates = projection_transform * vertex.eye_coordinates;
vertex.clip_coordinates = m_projection_transform * vertex.eye_coordinates;
for (GPU::TextureUnitIndex i = 0; i < GPU::NUM_TEXTURE_UNITS; ++i) {
auto const& texture_unit_configuration = m_texture_unit_configuration[i];
@ -1581,6 +1577,20 @@ ErrorOr<NonnullRefPtr<GPU::Shader>> Device::create_shader(GPU::IR::Shader const&
return shader;
}
void Device::set_model_view_transform(Gfx::FloatMatrix4x4 const& model_view_transform)
{
m_model_view_transform = model_view_transform;
// Set up normals transform by taking the upper left 3x3 elements from the model view matrix
// See section 2.11.3 of the OpenGL 1.5 spec
m_normal_transform = model_view_transform.submatrix_from_topleft<3>().transpose().inverse();
}
void Device::set_projection_transform(Gfx::FloatMatrix4x4 const& projection_transform)
{
m_projection_transform = projection_transform;
}
void Device::set_sampler_config(unsigned sampler, GPU::SamplerConfig const& config)
{
VERIFY(config.bound_image.is_null() || config.bound_image->ownership_token() == this);
@ -1626,10 +1636,10 @@ void Device::set_clip_planes(Vector<FloatVector4> const& clip_planes)
m_clip_planes = clip_planes;
}
void Device::set_raster_position(FloatVector4 const& position, FloatMatrix4x4 const& model_view_transform, FloatMatrix4x4 const& projection_transform)
void Device::set_raster_position(FloatVector4 const& position)
{
auto const eye_coordinates = model_view_transform * position;
auto const clip_coordinates = projection_transform * eye_coordinates;
auto const eye_coordinates = m_model_view_transform * position;
auto const clip_coordinates = m_projection_transform * eye_coordinates;
// FIXME: implement clipping
m_raster_position.valid = true;

10
Userland/Libraries/LibSoftGPU/Device.h
View File

@ -26,6 +26,7 @@
#include <LibGPU/TextureUnitConfiguration.h>
#include <LibGPU/Vertex.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/Matrix3x3.h>
#include <LibGfx/Matrix4x4.h>
#include <LibGfx/Rect.h>
#include <LibGfx/Vector4.h>
@ -48,7 +49,7 @@ public:
virtual GPU::DeviceInfo info() const override;
virtual void draw_primitives(GPU::PrimitiveType, FloatMatrix4x4 const& model_view_transform, FloatMatrix4x4 const& projection_transform, Vector<GPU::Vertex>& vertices) override;
virtual void draw_primitives(GPU::PrimitiveType, Vector<GPU::Vertex>& vertices) override;
virtual void resize(Gfx::IntSize min_size) override;
virtual void clear_color(FloatVector4 const&) override;
virtual void clear_depth(GPU::DepthType) override;
@ -68,6 +69,8 @@ public:
virtual NonnullRefPtr<GPU::Image> create_image(GPU::PixelFormat const&, u32 width, u32 height, u32 depth, u32 max_levels) override;
virtual ErrorOr<NonnullRefPtr<GPU::Shader>> create_shader(GPU::IR::Shader const&) override;
virtual void set_model_view_transform(FloatMatrix4x4 const&) override;
virtual void set_projection_transform(FloatMatrix4x4 const&) override;
virtual void set_sampler_config(unsigned, GPU::SamplerConfig const&) override;
virtual void set_light_state(unsigned, GPU::Light const&) override;
virtual void set_material_state(GPU::Face, GPU::Material const&) override;
@ -77,7 +80,7 @@ public:
virtual GPU::RasterPosition raster_position() const override { return m_raster_position; }
virtual void set_raster_position(GPU::RasterPosition const& raster_position) override;
virtual void set_raster_position(FloatVector4 const& position, FloatMatrix4x4 const& model_view_transform, FloatMatrix4x4 const& projection_transform) override;
virtual void set_raster_position(FloatVector4 const& position) override;
virtual void bind_fragment_shader(RefPtr<GPU::Shader>) override;
@ -105,6 +108,9 @@ private:
RefPtr<FrameBuffer<GPU::ColorType, GPU::DepthType, GPU::StencilType>> m_frame_buffer {};
GPU::RasterizerOptions m_options;
FloatMatrix4x4 m_model_view_transform;
FloatMatrix3x3 m_normal_transform;
FloatMatrix4x4 m_projection_transform;
GPU::LightModelParameters m_lighting_model;
Clipper m_clipper;
Vector<Triangle> m_triangle_list;

16
Userland/Libraries/LibVirtGPU/Device.cpp
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@ -193,7 +193,7 @@ void Device::encode_constant_buffer(Gfx::FloatMatrix4x4 const& matrix, Vector<fl
}
}
void Device::draw_primitives(GPU::PrimitiveType primitive_type, FloatMatrix4x4 const& modelview_matrix, FloatMatrix4x4 const& projection_matrix, Vector<GPU::Vertex>& vertices)
void Device::draw_primitives(GPU::PrimitiveType primitive_type, Vector<GPU::Vertex>& vertices)
{
// Transform incoming vertices to our own format.
m_vertices.clear_with_capacity();
@ -211,7 +211,7 @@ void Device::draw_primitives(GPU::PrimitiveType primitive_type, FloatMatrix4x4 c
// Compute combined transform matrix
// Flip the y axis. This is done because OpenGLs coordinate space has a Y-axis of
// Opposite direction to that of LibGfx
auto combined_matrix = (Gfx::scale_matrix(FloatVector3 { 1, -1, 1 }) * projection_matrix * modelview_matrix).transpose();
auto combined_matrix = (Gfx::scale_matrix(FloatVector3 { 1, -1, 1 }) * m_projection_transform * m_model_view_transform).transpose();
encode_constant_buffer(combined_matrix, m_constant_buffer_data);
// Create command buffer
@ -372,6 +372,16 @@ ErrorOr<NonnullRefPtr<GPU::Shader>> Device::create_shader(GPU::IR::Shader const&
return adopt_ref(*new Shader(this));
}
void Device::set_model_view_transform(Gfx::FloatMatrix4x4 const& model_view_transform)
{
m_model_view_transform = model_view_transform;
}
void Device::set_projection_transform(Gfx::FloatMatrix4x4 const& projection_transform)
{
m_projection_transform = projection_transform;
}
void Device::set_sampler_config(unsigned, GPU::SamplerConfig const&)
{
dbgln("VirtGPU::Device::set_sampler_config(): unimplemented");
@ -413,7 +423,7 @@ void Device::set_raster_position(GPU::RasterPosition const&)
dbgln("VirtGPU::Device::set_raster_position(): unimplemented");
}
void Device::set_raster_position(FloatVector4 const&, FloatMatrix4x4 const&, FloatMatrix4x4 const&)
void Device::set_raster_position(FloatVector4 const&)
{
dbgln("VirtGPU::Device::set_raster_position(): unimplemented");
}

9
Userland/Libraries/LibVirtGPU/Device.h
View File

@ -26,7 +26,7 @@ public:
virtual GPU::DeviceInfo info() const override;
virtual void draw_primitives(GPU::PrimitiveType, FloatMatrix4x4 const& model_view_transform, FloatMatrix4x4 const& projection_transform, Vector<GPU::Vertex>& vertices) override;
virtual void draw_primitives(GPU::PrimitiveType, Vector<GPU::Vertex>& vertices) override;
virtual void resize(Gfx::IntSize min_size) override;
virtual void clear_color(FloatVector4 const&) override;
virtual void clear_depth(GPU::DepthType) override;
@ -46,6 +46,8 @@ public:
virtual NonnullRefPtr<GPU::Image> create_image(GPU::PixelFormat const&, u32 width, u32 height, u32 depth, u32 max_levels) override;
virtual ErrorOr<NonnullRefPtr<GPU::Shader>> create_shader(GPU::IR::Shader const&) override;
virtual void set_model_view_transform(FloatMatrix4x4 const&) override;
virtual void set_projection_transform(FloatMatrix4x4 const&) override;
virtual void set_sampler_config(unsigned, GPU::SamplerConfig const&) override;
virtual void set_light_state(unsigned, GPU::Light const&) override;
virtual void set_material_state(GPU::Face, GPU::Material const&) override;
@ -55,7 +57,7 @@ public:
virtual GPU::RasterPosition raster_position() const override;
virtual void set_raster_position(GPU::RasterPosition const& raster_position) override;
virtual void set_raster_position(FloatVector4 const& position, FloatMatrix4x4 const& model_view_transform, FloatMatrix4x4 const& projection_transform) override;
virtual void set_raster_position(FloatVector4 const& position) override;
virtual void bind_fragment_shader(RefPtr<GPU::Shader>) override;
@ -67,6 +69,9 @@ private:
NonnullOwnPtr<Core::File> m_gpu_file;
FloatMatrix4x4 m_model_view_transform;
FloatMatrix4x4 m_projection_transform;
Protocol::ResourceID m_vbo_resource_id { 0 };
Protocol::ResourceID m_drawtarget { 0 };
Protocol::ResourceID m_depthbuffer_surface { 0 };