YiGeometryBatch.h

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// © You i Labs Inc. 2000-2017. All rights reserved.
#ifndef _YI_GEOMETRY_BATCH_H_
#define _YI_GEOMETRY_BATCH_H_

#include "utility/YiColor.h"

#include <glm/vec2.hpp>

#include <memory>

class CYIAssetBufferObjectData;
class CYIAssetShaderProgram;
class CYIAssetTexture;
class CYIAssetTextureBase;
class CYIMaterial;
class CYIMesh;
class CYIOffscreenRenderTarget;

class CYIGeometryBatch
{
public:
    static CYIGeometryBatch *GetInstance();
    ~CYIGeometryBatch();

    enum YI_TEXT_STYLE
    {
        YI_TEXT_STYLE_NORMAL,
        YI_TEXT_STYLE_SHADOW,
        YI_TEXT_STYLE_OUTLINE,
        YI_TEXT_STYLE_BOLD
    };
    
    enum YI_TEXT_SIZE
    {
        YI_VERY_SMALL, 
        YI_SMALL, 
        YI_REGULAR, 
        YI_LARGE, 
        YI_VERY_LARGE 
    };

    enum charACTER_SET
    {
        YI_UTF8,
        YI_CODE_PAGE_437
    };

    enum YI_LINE_STYLE
    {
        YI_LINE_SOLID = 0, 
        YI_LINE_DOT = 1, 
        YI_LINE_DASH = 2, 
        YI_LINE_DASH_DOT = 3, 
        YI_LINE_LONG_DASH = 4, 
        YI_LINE_LONG_DASH_DOT = 5, 
        YI_LINE_SPARSE_DOT = 6, 
        YI_LINE_SPARSE_DASH = 7 
    };

    enum YI_LINE_HEAD_STYLE
    {
        YI_LINE_HEAD_PLAIN = 0, 
        YI_LINE_HEAD_SIMPLE_ARROW = 1, 
        YI_LINE_HEAD_BARBED_ARROW = 2, 
        YI_LINE_HEAD_TRIANGLE_ARROW = 3, 
        YI_LINE_HEAD_HOLLOW_DIAMOND = 4, 
        YI_LINE_HEAD_SOLID_DIAMOND = 5, 
    };

    enum YI_WRAP_MODE
    {
        YI_WRAP_NONE, 
        YI_WRAP_ON_CHARACTER, 
        YI_WRAP_ON_SPACE 
    };

    struct TextSettings
    {
        TextSettings();

        glm::vec2 position; 
        CYIColor color; 
        float fScale; 
        YI_TEXT_STYLE eStyle; 
        charACTER_SET eCharacterSet; 
        YI_WRAP_MODE eWrapMode; 
        float fWrappingWidth; 
    };

    struct TextSize
    {
        glm::vec2 characterSize; 
        glm::vec2 boxSize; 
        glm::vec2 lastCharacterBottomRight; 
    };

    void Begin();

    void End();

    void DrawRect(const std::shared_ptr<CYIAssetTextureBase> &pTexture, const glm::vec4 &rect, const CYIColor &color = CYIColor(1.0f, 1.0f, 1.0f, 1.0f), const glm::vec4 &UVs = glm::vec4(0, 0, 1, 1));

    void DrawRect(const glm::vec4 &rect, const CYIColor &color = CYIColor(1.0f, 1.0f, 1.0f, 1.0f));

    void DrawRectWithRenderTarget(const std::shared_ptr<CYIOffscreenRenderTarget> &pRenderTarget, const glm::vec4 &rect, const CYIColor &color = CYIColor(1.0f, 1.0f, 1.0f, 1.0f), const glm::vec4 &UVs = glm::vec4(0, 0, 1, 1));

    void DrawOutline(const glm::vec4 &rect, const CYIColor &color = CYIColor(1.0f, 1.0f, 1.0f, 1.0f), float fSize = 1.f, YI_LINE_STYLE eStyle = YI_LINE_SOLID);

    void DrawQuad(const std::shared_ptr<CYIAssetTextureBase> &pTexture, const glm::vec2 &point1, const glm::vec2 &point2, const glm::vec2 &point3, const glm::vec2 &point4, const CYIColor &color = CYIColor(1.0f, 1.0f, 1.0f, 1.0f), const glm::vec4 &UVs = glm::vec4(0, 0, 1, 1));

    void DrawQuad(const glm::vec2 &point1, const glm::vec2 &point2, const glm::vec2 &point3, const glm::vec2 &point4, const CYIColor &color = CYIColor(1.0f, 1.0f, 1.0f, 1.0f));

    void DrawTriangle(const std::shared_ptr<CYIAssetTextureBase> &pTexture, const glm::vec2 &point1, const glm::vec2 &point2, const glm::vec2 &point3, const CYIColor &color = CYIColor(1.0f, 1.0f, 1.0f, 1.0f), const glm::vec4 &UVs = glm::vec4(0, 0, 1, 1));

    void DrawTriangle(const glm::vec2 &point1, const glm::vec2 &point2, const glm::vec2 &point3, const CYIColor &color = CYIColor(1.0f, 1.0f, 1.0f, 1.0f));
    
    void DrawLine(const glm::vec2 &start, const glm::vec2 &end, const CYIColor &color = CYIColor(1.0f, 1.0f, 1.0f, 1.0f), float fThickness = 1.f, YI_LINE_STYLE eLineStyle = YI_LINE_SOLID, YI_LINE_HEAD_STYLE eStartHeadStyle = YI_LINE_HEAD_PLAIN, YI_LINE_HEAD_STYLE eEndHeadStyle = YI_LINE_HEAD_PLAIN, float fHeadSize = 10.0f);

    TextSize DrawText(const CYIString &text, const glm::vec2 &pos, const CYIColor &color = CYIColor(1.0f, 1.0f, 1.0f, 1.0f), float fScale = 1.f, YI_TEXT_STYLE eStyle = YI_TEXT_STYLE_NORMAL, charACTER_SET eCharacterSet = YI_UTF8);

    TextSize DrawText(const CYIString &text, const TextSettings &settings);

    TextSize GetTextSize(const CYIString &text, const TextSettings &settings) const;
    
    static std::pair<glm::ivec2, float> GetTextSizeForCurrentSurface(YI_TEXT_SIZE eTextSize = YI_REGULAR);

    void PushClipping(const glm::vec4 &rect);

    void PopClipping();

private:
    struct VertexP2T2C4
    {
        glm::vec2 position;
        glm::vec2 texCoords;
        glm::vec4 color;
    };

    CYIGeometryBatch();

    void Flush();
    void CreateBuffers();

    void DrawRect(const std::shared_ptr<CYIAssetTextureBase> &pTexture, const glm::vec4 &rect, const CYIColor &color, const glm::vec4 &UVs, bool bTransposeTexture);
    void DrawQuad(const std::shared_ptr<CYIAssetTextureBase> &pTexture, const glm::vec2 &point1, const glm::vec2 &point2, const glm::vec2 &point3, const glm::vec2 &point4, const CYIColor &color, const glm::vec4 &UVs, bool bTransposeTexture);
    TextSize DrawText(const CYIString &text, const TextSettings &settings, bool bDraw);

    std::shared_ptr<CYIAssetTexture> CreateAndAddLineStyleTexture(const CYIString &pattern, const CYIString &nameFragment) const;

    VertexP2T2C4 *m_pVertices;
    float m_fInvWidth;
    float m_fInvHeight;
    std::shared_ptr<CYIAssetTextureBase> m_pCurrentTexture;
    std::shared_ptr<CYIAssetShaderProgram> m_pShader;
    std::shared_ptr<CYIAssetBufferObjectData> m_pIndexBuffer;
    std::shared_ptr<CYIAssetBufferObjectData> *m_pVertexBuffer;

    std::shared_ptr<CYIMesh> m_pMesh;
    std::shared_ptr<CYIMaterial> m_pMaterial;

    int32_t m_nCurrentBufferIndex;
    uint32_t m_uClippingStackHeight;

    static CYIGeometryBatch *s_pInstance;

    bool m_bIsDrawing;
    bool m_bRenderingEnabled;
    uint32_t m_uSpriteCount;
    std::shared_ptr<CYIAssetTextureBase> m_pASCIITexture;
    std::vector<std::shared_ptr<CYIAssetTextureBase>> m_lineStyleTextures;

    YI_DISALLOW_COPY_AND_ASSIGN(CYIGeometryBatch)
};

#endif // _YI_GEOMETRY_BATCH_H_