////////////////////////////////
//~ Material types

Struct(D_MaterialParams)
{
    Xform xf;
    GPU_Resource *texture;
    ClipRect clip;
    u32 tint;
    b32 is_light;
    Vec3 light_emittance;
};
#define D_MATERIALPARAMS(...) ((D_MaterialParams) { \
    .tint = ColorWhite, \
    .clip = AllClipped, \
    __VA_ARGS__ \
})

////////////////////////////////
//~ Ui types

Struct(D_UiRectParams)
{
    Xform xf;
    GPU_Resource *texture;
    ClipRect clip;
    u32 tint;
};
#define D_UIRECTPARAMS(...) ((D_UiRectParams) { \
    .tint = ColorWhite, \
    .clip = AllClipped, \
    __VA_ARGS__ \
})

////////////////////////////////
//~ Text types

/* How is text aligned within its area */
Enum(D_TextAlignment)
{
    DRAW_TEXT_ALIGNMENT_LEFT,  /* Default */
    DRAW_TEXT_ALIGNMENT_CENTER,
    DRAW_TEXT_ALIGNMENT_RIGHT
};

/* How does the specified text position relate to the text area.
 * E.g. BOTTOM & RIGHT means the bottom-right of the text area will snap to
 * the specified position. */
Enum(D_TextOffsetX)
{
    DRAW_TEXT_OFFSET_X_LEFT,  /* Default */
    DRAW_TEXT_OFFSET_X_CENTER,
    DRAW_TEXT_OFFSET_X_RIGHT
};

Enum(D_TextOffsetY)
{
    DRAW_TEXT_OFFSET_Y_TOP,  /* Default */
    DRAW_TEXT_OFFSET_Y_CENTER,
    DRAW_TEXT_OFFSET_Y_BOTTOM
};

Struct(D_TextGlyph)
{
    f32 off_x;
    f32 off_y;
    f32 width;
    f32 height;
    f32 advance;
    ClipRect clip;
};

Struct(D_TextLine)
{
    f32 line_width;
    u32 num_glyphs;
    D_TextGlyph *glyphs;
    D_TextLine *next;
};

Struct(D_TextParams)
{
    F_Font *font;
    Vec2 pos;
    f32 scale;
    u32 color;
    D_TextAlignment alignment;
    D_TextOffsetX offset_x;
    D_TextOffsetY offset_y;
    String str;
};
#define D_TEXTPARAMS(...) ((D_TextParams) { \
    .scale = 1.0, \
    .alignment = DRAW_TEXT_ALIGNMENT_LEFT, \
    .offset_x = DRAW_TEXT_OFFSET_X_LEFT, \
    .offset_y = DRAW_TEXT_OFFSET_Y_TOP, \
    .color = ColorWhite, \
    __VA_ARGS__ \
})

////////////////////////////////
//~ State types

Struct(D_SharedState)
{
    GPU_Resource *solid_white_texture;
} extern D_shared_state;

////////////////////////////////
//~ Startup

void D_Startup(void);

////////////////////////////////
//~ Material operations

void D_DrawMaterial(GPU_RenderSig *sig, D_MaterialParams params);

////////////////////////////////
//~ Solid shape operations

void D_DrawPolyEx(GPU_RenderSig *sig, Vec2Array vertices, GPU_Indices indices, u32 color);
void D_DrawPoly(GPU_RenderSig *sig, Vec2Array points, u32 color);
void D_DrawCircle(GPU_RenderSig *sig, Vec2 pos, f32 radius, u32 color, u32 detail);
void D_DrawQuad(GPU_RenderSig *sig, Quad quad, u32 color);

////////////////////////////////
//~ Line shape operations

void D_DrawLineGradient(GPU_RenderSig *sig, Vec2 start, Vec2 end, f32 thickness, u32 start_color, u32 end_color);
void D_DrawLine(GPU_RenderSig *sig, Vec2 start, Vec2 end, f32 thickness, u32 color);
void D_DrawRay(GPU_RenderSig *sig, Vec2 pos, Vec2 rel, f32 thickness, u32 color);
void D_DrawPolyLine(GPU_RenderSig *sig, Vec2Array points, b32 loop, f32 thickness, u32 color);
void D_DrawCircleLine(GPU_RenderSig *sig, Vec2 pos, f32 radius, f32 thickness, u32 color, u32 detail);
void D_DrawQuadLine(GPU_RenderSig *sig, Quad quad, f32 thickness, u32 color);
void D_DrawArrowLine(GPU_RenderSig *sig, Vec2 start, Vec2 end, f32 thickness, f32 arrowhead_height, u32 color);
void D_DrawArrowRay(GPU_RenderSig *sig, Vec2 pos, Vec2 rel, f32 thickness, f32 arrowhead_height, u32 color);
void D_DrawColliderLine(GPU_RenderSig *sig, CLD_Shape shape, Xform shape_xf, f32 thickness, u32 color, u32 detail);

////////////////////////////////
//~ Grid operations

void D_DrawGrid(GPU_RenderSig *sig, Xform xf, u32 bg0_color, u32 bg1_color, u32 line_color, u32 x_color, u32 y_color, f32 thickness, f32 spacing, Vec2 offset);

////////////////////////////////
//~ Ui operations

void D_DrawUiRect(GPU_RenderSig *sig, D_UiRectParams params);

////////////////////////////////
//~ Text operations

Rect draw_text(GPU_RenderSig *sig, D_TextParams params);