RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-26 00:27:43 +00:00
Code Issues Activity Actions

LibSoftGPU: Make input in PixelQuad generic

Browse source 
Previously we would store vertex color and texture coordinates in
separate fields in PixelQuad. To make them accessible from shaders we
need to store them as a completely generic array of floats.
This commit is contained in:
Stephan Unverwerth 2022-09-17 12:38:57 +02:00 • committed by Andrew Kaster
parent 49139d5f4e
commit c008b6ce18
3 changed files with 45 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

29
Userland/Libraries/LibSoftGPU/Device.cpp
View file

@ -578,9 +578,10 @@ void Device::rasterize_line_antialiased(GPU::Vertex& from, GPU::Vertex& to)
[&from_color4, &from, &from_fog_depth4](auto& quad) {
// FIXME: interpolate color, tex coords and fog depth along the distance of the line
// in clip space (i.e. NOT distance_from_line)
quad.vertex_color = from_color4;
quad.set_input(SHADER_INPUT_VERTEX_COLOR, from_color4);
for (size_t i = 0; i < GPU::NUM_TEXTURE_UNITS; ++i)
quad.texture_coordinates[i] = expand4(from.tex_coords[i]);
quad.set_input(SHADER_INPUT_FIRST_TEXCOORD + i * 4, expand4(from.tex_coords[i]));
quad.fog_depth = from_fog_depth4;
});
}
@ -625,9 +626,10 @@ void Device::rasterize_point_aliased(GPU::Vertex& point)
quad.depth = expand4(point.window_coordinates.z());
},
[&point](auto& quad) {
quad.vertex_color = expand4(point.color);
quad.set_input(SHADER_INPUT_VERTEX_COLOR, expand4(point.color));
for (size_t i = 0; i < GPU::NUM_TEXTURE_UNITS; ++i)
quad.texture_coordinates[i] = expand4(point.tex_coords[i]);
quad.set_input(SHADER_INPUT_FIRST_TEXCOORD + i * 4, expand4(point.tex_coords[i]));
quad.fog_depth = expand4(abs(point.eye_coordinates.z()));
});
}
@ -660,9 +662,10 @@ void Device::rasterize_point_antialiased(GPU::Vertex& point)
quad.depth = expand4(point.window_coordinates.z());
},
[&point](auto& quad) {
quad.vertex_color = expand4(point.color);
quad.set_input(SHADER_INPUT_VERTEX_COLOR, expand4(point.color));
for (size_t i = 0; i < GPU::NUM_TEXTURE_UNITS; ++i)
quad.texture_coordinates[i] = expand4(point.tex_coords[i]);
quad.set_input(SHADER_INPUT_FIRST_TEXCOORD + i * 4, expand4(point.tex_coords[i]));
quad.fog_depth = expand4(abs(point.eye_coordinates.z()));
});
}
@ -810,12 +813,12 @@ void Device::rasterize_triangle(Triangle& triangle)
// FIXME: make this more generic. We want to interpolate more than just color and uv
if (m_options.shade_smooth)
quad.vertex_color = interpolate(expand4(vertex0.color), expand4(vertex1.color), expand4(vertex2.color), quad.barycentrics);
quad.set_input(SHADER_INPUT_VERTEX_COLOR, interpolate(expand4(vertex0.color), expand4(vertex1.color), expand4(vertex2.color), quad.barycentrics));
else
quad.vertex_color = expand4(vertex0.color);
quad.set_input(SHADER_INPUT_VERTEX_COLOR, expand4(vertex0.color));
for (GPU::TextureUnitIndex i = 0; i < GPU::NUM_TEXTURE_UNITS; ++i)
quad.texture_coordinates[i] = interpolate(expand4(vertex0.tex_coords[i]), expand4(vertex1.tex_coords[i]), expand4(vertex2.tex_coords[i]), quad.barycentrics);
quad.set_input(SHADER_INPUT_FIRST_TEXCOORD + i * 4, interpolate(expand4(vertex0.tex_coords[i]), expand4(vertex1.tex_coords[i]), expand4(vertex2.tex_coords[i]), quad.barycentrics));
if (m_options.fog_enabled)
quad.fog_depth = fog_depth.dot(quad.barycentrics);
@ -1208,14 +1211,16 @@ ALWAYS_INLINE void Device::shade_fragments(PixelQuad& quad)
{
Array<Vector4<f32x4>, GPU::NUM_TEXTURE_UNITS> texture_stage_texel;
auto current_color = quad.vertex_color;
auto current_color = quad.get_input_vector4(SHADER_INPUT_VERTEX_COLOR);
for (GPU::TextureUnitIndex i = 0; i < GPU::NUM_TEXTURE_UNITS; ++i) {
if (!m_texture_unit_configuration[i].enabled)
continue;
auto const& sampler = m_samplers[i];
// OpenGL 2.0 ¶ 3.5.1 states (in a roundabout way) that texture coordinates must be divided by Q
auto texel = sampler.sample_2d(quad.texture_coordinates[i].xy() / quad.texture_coordinates[i].w());
auto homogeneous_texture_coordinate = quad.get_input_vector4(SHADER_INPUT_FIRST_TEXCOORD + i * 4);
auto texel = sampler.sample_2d(homogeneous_texture_coordinate.xy() / homogeneous_texture_coordinate.w());
texture_stage_texel[i] = texel;
INCREASE_STATISTICS_COUNTER(g_num_sampler_calls, 1);
@ -1244,7 +1249,7 @@ ALWAYS_INLINE void Device::shade_fragments(PixelQuad& quad)
case GPU::TextureSource::Previous:
return current_color;
case GPU::TextureSource::PrimaryColor:
return quad.vertex_color;
return quad.get_input_vector4(SHADER_INPUT_VERTEX_COLOR);
case GPU::TextureSource::Texture:
return texel;
case GPU::TextureSource::TextureStage: