base_renderer3d.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef WINTERMUTE_BASE_RENDERER_3D_H
#define WINTERMUTE_BASE_RENDERER_3D_H

#include "engines/wintermute/base/gfx/base_renderer.h"
#include "engines/wintermute/coll_templ.h"
#include "engines/wintermute/dctypes.h"
#include "engines/wintermute/math/rect32.h"
#include "engines/wintermute/math/vector2.h"

#include "graphics/transform_struct.h"
#include "graphics/surface.h"

#include "math/matrix4.h"
#include "math/ray.h"

#if defined(USE_OPENGL_SHADERS)

#include "graphics/opengl/system_headers.h"

#endif

namespace Wintermute {

class AdBlock;
class AdGeneric;
class AdWalkplane;
class BaseSurfaceOpenGL3D;
class Light3D;
class Mesh3DS;
class XMesh;
class ShadowVolume;

class BaseRenderer3D : public BaseRenderer {
public:
    BaseRenderer3D(BaseGame *inGame = nullptr);
    ~BaseRenderer3D() override;

    bool setAmbientLightColor(uint32 color);
    bool setDefaultAmbientLightColor();
    virtual void setAmbientLight() = 0;

    uint32 _ambientLightColor;
    bool _overrideAmbientLightColor;

    virtual int maximumLightsCount() = 0;
    virtual void enableLight(int index) = 0;
    virtual void disableLight(int index) = 0;
    virtual void setLightParameters(int index, const Math::Vector3d &position, const Math::Vector3d &direction,
                                    const Math::Vector4d &diffuse, bool spotlight) = 0;

    virtual void setSpriteBlendMode(Graphics::TSpriteBlendMode blendMode) = 0;

    virtual void enableCulling() = 0;
    virtual void disableCulling() = 0;

    virtual bool enableShadows() = 0;
    virtual bool disableShadows() = 0;
    virtual void displayShadow(BaseObject *object, const Math::Vector3d &light, bool lightPosRelative) = 0;
    virtual bool stencilSupported() = 0;

    Rect32 getViewPort() override;

    Graphics::PixelFormat getPixelFormat() const override;
    void fade(uint16 alpha) override;

    void initLoop() override;

    virtual bool setProjection2D() = 0;
    virtual void setWorldTransform(const Math::Matrix4 &transform) = 0;

    void project(const Math::Matrix4 &worldMatrix, const Math::Vector3d &point, int32 &x, int32 &y);
    Math::Ray rayIntoScene(int x, int y);

    Math::Matrix4 lastProjectionMatrix() {
        return _projectionMatrix3d;
    }

    virtual Mesh3DS *createMesh3DS() = 0;
    virtual XMesh *createXMesh() = 0;
    virtual ShadowVolume *createShadowVolume() = 0;

    bool drawSprite(BaseSurfaceOpenGL3D &tex, const Rect32 &rect, float zoomX, float zoomY, const Vector2 &pos,
                    uint32 color, bool alphaDisable, Graphics::TSpriteBlendMode blendMode, bool mirrorX, bool mirrorY);
    virtual bool drawSpriteEx(BaseSurfaceOpenGL3D &tex, const Rect32 &rect, const Vector2 &pos, const Vector2 &rot, const Vector2 &scale,
                              float angle, uint32 color, bool alphaDisable, Graphics::TSpriteBlendMode blendMode, bool mirrorX, bool mirrorY) = 0;

    virtual void renderSceneGeometry(const BaseArray<AdWalkplane *> &planes, const BaseArray<AdBlock *> &blocks,
                                     const BaseArray<AdGeneric *> &generics, const BaseArray<Light3D *> &lights, Camera3D *camera) = 0;
    virtual void renderShadowGeometry(const BaseArray<AdWalkplane *> &planes, const BaseArray<AdBlock *> &blocks, const BaseArray<AdGeneric *> &generics, Camera3D *camera) = 0;

    Math::Matrix3 build2dTransformation(const Vector2 &center, float angle);

protected:
    Math::Matrix4 _lastViewMatrix;
    Math::Matrix4 _projectionMatrix3d;
    Rect32 _viewport3dRect;

    void flipVertical(Graphics::Surface *s);
};

} // namespace Wintermute

#endif