4coder/4ed_rendering.h

201 lines
4.3 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
internal void*
part_alloc(int size, void *context){
Partition *part = (Partition*)context;
void *result = push_block(part, size);
return(result);
}
internal void
part_free(void *ptr, void *context){
}
#define STBTT_malloc part_alloc
#define STBTT_free part_free
#define STB_TRUETYPE_IMPLEMENTATION
#include "stb_truetype.h"
struct Glyph_Data{
b32 exists;
};
struct Render_Font{
char name_[24];
String name;
b32 loaded;
Glyph_Data glyphs[256];
stbtt_packedchar chardata[256];
float advance_data[256];
i32 height, ascent, descent, line_skip;
i32 advance;
u32 tex;
i32 tex_width, tex_height;
};
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) void name(Render_Target *target)
typedef Draw_Pop_Clip_Sig(Draw_Pop_Clip);
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
};
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, right_color;
};
struct Render_Piece_Glyph{
Vec2 pos;
u32 color;
i16 font_id;
u8 character;
};
struct Render_Piece_Glyph_Advance{
Vec2 pos;
u32 color;
f32 advance;
i16 font_id;
u8 character;
};
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;
};
};
#define Draw_Push_Piece_Sig(name) void name(Render_Target *target, Render_Piece_Combined piece)
typedef Draw_Push_Piece_Sig(Draw_Push_Piece);
#define Font_Load_Sig(name) i32 name( \
Partition *partition, \
Render_Font *font_out, \
char *filename, \
i32 pt_size, \
i32 tab_width)
typedef Font_Load_Sig(Font_Load);
#define Font_Info_Load_Sig(name) i32 name( \
Partition *partition, \
char *filename, \
i32 pt_size, \
i32 *height, \
i32 *advance)
typedef Font_Info_Load_Sig(Font_Info_Load);
#define Release_Font_Sig(name) void name(Render_Font *font)
typedef Release_Font_Sig(Release_Font);
struct Font_Table_Entry{
u32 hash;
String name;
i16 font_id;
};
struct Font_Info{
Render_Font *font;
String filename;
String name;
i32 height, advance;
i32 pt_size;
};
struct Font_Slot{
Font_Slot *next, *prev;
i16 font_id;
u8 padding[14];
};
struct Font_Set{
Font_Info *info;
Font_Table_Entry *entries;
u32 count, max;
void *font_block;
Font_Slot free_slots;
Font_Slot used_slots;
Font_Info_Load *font_info_load;
Font_Load *font_load;
Release_Font *release_font;
b8 *font_used_flags;
i16 used_this_frame;
i16 live_max;
};
struct Render_Target{
void *handle;
void *context;
i32_Rect clip_boxes[5];
i32 clip_top;
i32 width, height;
i32 bound_texture;
u32 color;
byte *push_buffer;
i32 size, max;
Font_Set font_set;
Partition *partition;
Draw_Push_Clip *push_clip;
Draw_Pop_Clip *pop_clip;
Draw_Push_Piece *push_piece;
};
inline i32_Rect
rect_from_target(Render_Target *target){
return i32R(0, 0, target->width, target->height);
}
inline Font_Info*
get_font_info(Font_Set *set, i16 font_id){
Font_Info *result = set->info + font_id - 1;
return(result);
}
#endif
// BOTTOM