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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef SMF_RENDERSTATE_H
#define SMF_RENDERSTATE_H
#include <array>
#include "Map/MapDrawPassTypes.h"
class CSMFGroundDrawer;
struct float4;
struct ISkyLight;
struct LuaMapShaderData;
namespace Shader {
struct IProgramObject;
}
enum {
RENDER_STATE_NOP = 0, // no-op path
RENDER_STATE_SSP = 1, // standard-shader path
RENDER_STATE_LUA = 2, // Lua-shader path
RENDER_STATE_SEL = 3, // selected path
RENDER_STATE_CNT = 4,
};
struct ISMFRenderState {
public:
static ISMFRenderState* GetInstance(bool nopState, bool luaShader);
static void FreeInstance(ISMFRenderState* state) { delete state; }
virtual ~ISMFRenderState() {}
virtual bool Init(const CSMFGroundDrawer* smfGroundDrawer) = 0;
virtual void Kill() = 0;
virtual void Update(
const CSMFGroundDrawer* smfGroundDrawer,
const LuaMapShaderData* luaMapShaderData
) = 0;
virtual bool HasValidShader(const DrawPass::e& drawPass) const = 0;
virtual bool CanEnable(const CSMFGroundDrawer* smfGroundDrawer) const = 0;
virtual bool CanDrawForward() const = 0;
virtual bool CanDrawDeferred() const = 0;
virtual void Enable(const CSMFGroundDrawer* smfGroundDrawer, const DrawPass::e& drawPass) = 0;
virtual void Disable(const CSMFGroundDrawer* smfGroundDrawer, const DrawPass::e& drawPass) = 0;
virtual void SetSquareTexGen(const int sqx, const int sqy, const int nsx, const int mip) const = 0;
virtual void SetCurrentShader(const DrawPass::e& drawPass) = 0;
virtual void SetSkyLight(const ISkyLight* skyLight) const = 0;
virtual void SetAlphaTest(const float4& params) const = 0;
};
struct SMFRenderStateNOP: public ISMFRenderState {
bool Init(const CSMFGroundDrawer* smfGroundDrawer) override { return true; }
void Kill() override {}
void Update(
const CSMFGroundDrawer* smfGroundDrawer,
const LuaMapShaderData* luaMapShaderData
) override {}
bool HasValidShader(const DrawPass::e& drawPass) const override { return false; }
bool CanEnable(const CSMFGroundDrawer* smfGroundDrawer) const override { return true; }
bool CanDrawForward() const override { return false; }
bool CanDrawDeferred() const override { return false; }
void Enable(const CSMFGroundDrawer* smfGroundDrawer, const DrawPass::e& drawPass) override {}
void Disable(const CSMFGroundDrawer* smfGroundDrawer, const DrawPass::e& drawPass) override {}
void SetSquareTexGen(const int sqx, const int sqy, const int nsx, const int mip) const override {}
void SetCurrentShader(const DrawPass::e& drawPass) override {}
void SetSkyLight(const ISkyLight* skyLight) const override {}
void SetAlphaTest(const float4& params) const override {}
};
struct SMFRenderStateGLSL: public ISMFRenderState {
public:
SMFRenderStateGLSL(bool lua): useLuaShaders(lua) { glslShaders.fill(nullptr); }
~SMFRenderStateGLSL() { glslShaders.fill(nullptr); }
bool Init(const CSMFGroundDrawer* smfGroundDrawer) override;
void Kill() override;
void Update(
const CSMFGroundDrawer* smfGroundDrawer,
const LuaMapShaderData* luaMapShaderData
) override;
bool HasValidShader(const DrawPass::e& drawPass) const override;
bool CanEnable(const CSMFGroundDrawer* smfGroundDrawer) const override { return true; }
bool CanDrawForward() const override { return true; }
bool CanDrawDeferred() const override { return true; }
void Enable(const CSMFGroundDrawer* smfGroundDrawer, const DrawPass::e& drawPass) override;
void Disable(const CSMFGroundDrawer* smfGroundDrawer, const DrawPass::e& drawPass) override;
void SetSquareTexGen(const int sqx, const int sqy, const int nsx, const int mip) const override;
void SetCurrentShader(const DrawPass::e& drawPass) override;
void SetSkyLight(const ISkyLight* skyLight) const override;
void SetAlphaTest(const float4& params) const override;
enum {
GLSL_SHADER_STANDARD = 0,
GLSL_SHADER_DEFERRED = 1,
GLSL_SHADER_CURRENT = 2,
GLSL_SHADER_COUNT = 3,
};
private:
// [0] := standard version
// [1] := deferred version (not used unless AllowDeferredMapRendering)
// [2] := currently active GLSL shader {0, 1}
std::array<Shader::IProgramObject*, GLSL_SHADER_COUNT> glslShaders;
// if true, shader programs for this state are Lua-defined
bool useLuaShaders;
};
#endif
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