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Shader: Define a common interface for running vertex shader programs.

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bunnei
2015-07-21 19:38:59 -04:00
parent 18527b9e21
commit 3f69c2039d
7 changed files with 289 additions and 186 deletions
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59
src/video_core/shader/shader_interpreter.h
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@ -4,68 +4,15 @@
#pragma once
#include <type_traits>
#include "common/vector_math.h"
#include "video_core/pica.h"
#include "shader.h"
namespace Pica {
namespace Shader {
struct InputVertex {
Math::Vec4<float24> attr[16];
};
struct OutputVertex {
OutputVertex() = default;
// VS output attributes
Math::Vec4<float24> pos;
Math::Vec4<float24> dummy; // quaternions (not implemented, yet)
Math::Vec4<float24> color;
Math::Vec2<float24> tc0;
Math::Vec2<float24> tc1;
float24 pad[6];
Math::Vec2<float24> tc2;
// Padding for optimal alignment
float24 pad2[4];
// Attributes used to store intermediate results
// position after perspective divide
Math::Vec3<float24> screenpos;
float24 pad3;
// Linear interpolation
// factor: 0=this, 1=vtx
void Lerp(float24 factor, const OutputVertex& vtx) {
pos = pos * factor + vtx.pos * (float24::FromFloat32(1) - factor);
// TODO: Should perform perspective correct interpolation here...
tc0 = tc0 * factor + vtx.tc0 * (float24::FromFloat32(1) - factor);
tc1 = tc1 * factor + vtx.tc1 * (float24::FromFloat32(1) - factor);
tc2 = tc2 * factor + vtx.tc2 * (float24::FromFloat32(1) - factor);
screenpos = screenpos * factor + vtx.screenpos * (float24::FromFloat32(1) - factor);
color = color * factor + vtx.color * (float24::FromFloat32(1) - factor);
}
// Linear interpolation
// factor: 0=v0, 1=v1
static OutputVertex Lerp(float24 factor, const OutputVertex& v0, const OutputVertex& v1) {
OutputVertex ret = v0;
ret.Lerp(factor, v1);
return ret;
}
};
static_assert(std::is_pod<OutputVertex>::value, "Structure is not POD");
static_assert(sizeof(OutputVertex) == 32 * sizeof(float), "OutputVertex has invalid size");
OutputVertex RunShader(const InputVertex& input, int num_attributes, const Regs::ShaderConfig& config, const State::ShaderSetup& setup);
void RunInterpreter(UnitState& state);
} // namespace