4coder/4ed_rendering.h

123 lines
2.2 KiB
C

/*
* Mr. 4th Dimention - Allen Webster
*
* 17.12.2014
*
* Rendering layer for project codename "4ed"
*
*/
// TOP
#ifndef FRED_RENDERING_H
#define FRED_RENDERING_H
//
// Render Commands
//
enum Render_Piece_Type{
piece_type_rectangle,
piece_type_outline,
piece_type_gradient,
piece_type_glyph,
piece_type_mono_glyph,
piece_type_mono_glyph_advance,
piece_type_change_clip
};
struct Render_Piece_Header{
i32 type;
};
struct Render_Piece_Rectangle{
f32_Rect rect;
u32 color;
};
struct Render_Piece_Gradient{
f32_Rect rect;
u32 left_color;
u32 right_color;
};
struct Render_Piece_Glyph{
Vec2 pos;
u32 color;
Font_ID font_id;
u32 codepoint;
};
struct Render_Piece_Glyph_Advance{
Vec2 pos;
u32 color;
f32 advance;
Font_ID font_id;
u32 codepoint;
};
struct Render_Piece_Change_Clip{
i32_Rect box;
};
struct Render_Piece_Combined{
Render_Piece_Header header;
union{
Render_Piece_Rectangle rectangle;
Render_Piece_Gradient gradient;
Render_Piece_Glyph glyph;
Render_Piece_Glyph_Advance glyph_advance;
};
};
struct Render_Target;
#define Draw_Push_Clip_Sig(name) void name(Render_Target *target, i32_Rect clip_box)
typedef Draw_Push_Clip_Sig(Draw_Push_Clip);
#define Draw_Pop_Clip_Sig(name) i32_Rect name(Render_Target *target)
typedef Draw_Pop_Clip_Sig(Draw_Pop_Clip);
#define Draw_Push_Piece_Sig(name) void name(Render_Target *target, Render_Piece_Combined piece)
typedef Draw_Push_Piece_Sig(Draw_Push_Piece);
//
// Render target stuff
//
struct Render_Target{
void *handle;
void *context;
i32_Rect clip_boxes[5];
i32 clip_top;
b32 clip_all;
i32 width, height;
i32 bound_texture;
u32 color;
// TODO(allen): change this to a Partition
char *push_buffer;
i32 size, max;
Draw_Push_Clip *push_clip;
Draw_Pop_Clip *pop_clip;
Draw_Push_Piece *push_piece;
};
#define DpiMultiplier(n,dpi) ((n) * (dpi) / 96)
inline i32_Rect
rect_from_target(Render_Target *target){
i32_Rect r;
r.x0 = 0;
r.y0 = 0;
r.x1 = target->width;
r.y1 = target->height;
return(r);
}
#endif
// BOTTOM