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LibGL+LibSoftGPU: Implement rasterization position

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Implements support for `glRasterPos` and updating the raster position's
window coordinates through `glBitmap`. The input for `glRasterPos` is
an object position that needs to go through the same vertex
transformations as our regular triangles.
This commit is contained in:
Jelle Raaijmakers 2022-01-12 17:07:53 +01:00 • committed by Andreas Kling
parent a4d98c4622
commit ca78327a96
4 changed files with 80 additions and 23 deletions
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17
Userland/Libraries/LibSoftGPU/Device.h
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@ -84,6 +84,15 @@ struct LightModelParameters {
struct PixelQuad;
struct RasterPosition {
FloatVector4 window_coordinates { 0.0f, 0.0f, 0.0f, 1.0f };
float eye_coordinate_distance { 0.0f };
bool valid { true };
FloatVector4 color_rgba { 1.0f, 1.0f, 1.0f, 1.0f };
float color_index { 1.0f };
FloatVector4 texture_coordinates { 0.0f, 0.0f, 0.0f, 1.0f };
};
class Device final {
public:
Device(const Gfx::IntSize& min_size);
@ -94,8 +103,8 @@ public:
void resize(const Gfx::IntSize& min_size);
void clear_color(const FloatVector4&);
void clear_depth(float);
void blit(Gfx::Bitmap const&, int x, int y);
void blit_to(Gfx::Bitmap&);
void blit_to_color_buffer_at_raster_position(Gfx::Bitmap const&);
void wait_for_all_threads() const;
void set_options(const RasterizerOptions&);
void set_light_model_params(const LightModelParameters&);
@ -110,8 +119,13 @@ public:
void set_light_state(unsigned, Light const&);
void set_material_state(unsigned, Material const&);
RasterPosition raster_position() const { return m_raster_position; }
void set_raster_position(RasterPosition const& raster_position);
void set_raster_position(FloatVector4 const& position, FloatMatrix4x4 const& model_view_transform, FloatMatrix4x4 const& projection_transform);
private:
void draw_statistics_overlay(Gfx::Bitmap&);
Gfx::IntRect raster_rect_in_target_coordinates(Gfx::IntSize size);
void rasterize_triangle(const Triangle& triangle);
void setup_blend_factors();
@ -132,6 +146,7 @@ private:
AlphaBlendFactors m_alpha_blend_factors;
Array<Light, NUM_LIGHTS> m_lights;
Array<Material, 2u> m_materials;
RasterPosition m_raster_position;
};
}