v4k-git-backup/engine/split/v4k_render.h

647 lines
21 KiB
C

// -----------------------------------------------------------------------------
// naive rendering framework
// - rlyeh, public domain
//
// IQM skeletal meshes by @lsalzman (public domain) - https://bit.ly/2OQh0Me
// SH code by @ands (public domain) - https://github.com/ands/spherical_harmonics_playground
// SHM code by @jarikomppa (unlicensed) - https://github.com/jarikomppa/shadertoolkit
typedef unsigned handle; // GLuint
// -----------------------------------------------------------------------------
// colors
API unsigned rgba( uint8_t r, uint8_t g, uint8_t b, uint8_t a );
API unsigned bgra( uint8_t b, uint8_t g, uint8_t r, uint8_t a );
API unsigned rgbaf( float r, float g, float b, float a );
API unsigned bgraf( float b, float g, float r, float a );
API float alpha( unsigned rgba );
#define RGBX(rgb,x) ( ((rgb)&0xFFFFFF) | (((unsigned)(x))<<24) )
#define RGB3(r,g,b) ( ((r)<<16) | ((g)<<8) | (b) )
#define RGB4(r,g,b,a) RGBX(RGB3(r,g,b),a)
#define BLACK RGBX(0x000000,255)
#define WHITE RGBX(0xFFF1E8,255)
#if 0
#define RED RGBX(0xFF004D,255)
#define GREEN RGBX(0x00B543,255)
#define BLUE RGBX(0x065AB5,255)
#define ORANGE RGBX(0xFF6C24,255)
#define CYAN RGBX(0x29ADFF,255)
#define PURPLE RGBX(0x7E2553,255)
#define YELLOW RGBX(0xFFEC27,255)
#define GRAY RGBX(0x725158,255)
#else
#define RED RGB3( 255,48,48 )
#define GREEN RGB3( 144,255,48 )
#define CYAN RGB3( 0,192,255 )
#define ORANGE RGB3( 255,144,48 )
#define PURPLE RGB3( 102,77,102 ) // 178,128,255 )
#define YELLOW RGB3( 255,224,0 )
#define GRAY RGB3( 149,149,149 )
#define PINK RGB3( 255,48,144 )
#define AQUA RGB3( 48,255,144 )
#define BLUE RGBX(0x065AB5,255)
#endif
// -----------------------------------------------------------------------------
// images
/// flags when constructing the image_t type. see: image, image_from_mem
/// IMAGE_R: 1-channel image (R)
/// IMAGE_RG: 2-channel image (R,G)
/// IMAGE_RGB: 3-channel image (R,G,B)
/// IMAGE_RGBA: 4-channel image (R,G,B,A)
/// IMAGE_FLIP: Flip image vertically
/// IMAGE_FLOAT: Float pixel components
enum IMAGE_FLAGS {
IMAGE_R = 0x01000,
IMAGE_RG = 0x02000,
IMAGE_RGB = 0x04000,
IMAGE_RGBA = 0x08000,
IMAGE_FLIP = 0x10000,
IMAGE_FLOAT = 0x20000,
};
/// type that holds linear uncompressed bitmap of any given dimensions.
/// w,h: image dimensions in pixels. `x,y` alias.
/// comps: number of components per pixel. `n` alias.
/// pixels: untyped pointer to linear bitmap data. typed pointers use `pixels8/16/32/f` aliases.
/// see: texture_t
typedef struct image_t {
union { unsigned x, w; };
union { unsigned y, h; };
union { unsigned n, comps; };
union { void *pixels; uint8_t *pixels8; uint16_t *pixels16; uint32_t *pixels32; float *pixelsf; };
} image_t;
API image_t image(const char *pathfile, int flags);
API image_t image_from_mem(const void *ptr, int len, int flags);
API void image_destroy(image_t *img);
// -----------------------------------------------------------------------------
// textures
enum TEXTURE_FLAGS {
// UNIT[0..7]
TEXTURE_BC1 = 8, // DXT1, RGB with 8:1 compression ratio (+ optional 1bpp for alpha)
TEXTURE_BC2 = 16, // DXT3, RGBA with 4:1 compression ratio (BC1 for RGB + 4bpp for alpha)
TEXTURE_BC3 = 32, // DXT5, RGBA with 4:1 compression ratio (BC1 for RGB + BC4 for A)
// TEXTURE_BC4, // Alpha
TEXTURE_NEAREST = 0,
TEXTURE_LINEAR = 64,
TEXTURE_MIPMAPS = 128,
TEXTURE_CLAMP = 0,
TEXTURE_BORDER = 0x100,
TEXTURE_REPEAT = 0x200,
TEXTURE_BYTE = 0,
TEXTURE_FLOAT = IMAGE_FLOAT,
TEXTURE_COLOR = 0,
TEXTURE_DEPTH = 0x800,
TEXTURE_R = IMAGE_R,
TEXTURE_RG = IMAGE_RG,
TEXTURE_RGB = IMAGE_RGB,
TEXTURE_RGBA = IMAGE_RGBA,
TEXTURE_FLIP = IMAGE_FLIP,
// @fixme
TEXTURE_SRGB = 1 << 24,
TEXTURE_BGR = 1 << 25,
TEXTURE_ARRAY = 1 << 26,
};
typedef struct texture_t {
union { unsigned x, w; };
union { unsigned y, h; };
union { unsigned z, d; };
union { unsigned n, bpp; };
handle id, unit;
unsigned texel_type;
unsigned flags;
char* filename;
bool transparent;
unsigned fbo; // for texture recording
} texture_t;
API texture_t texture_compressed(const char *filename, unsigned flags);
API texture_t texture_compressed_from_mem(const void *data, int len, unsigned flags);
API texture_t texture(const char* filename, int flags);
API texture_t texture_from_mem(const void* ptr, int len, int flags);
API texture_t texture_create(unsigned w, unsigned h, unsigned n, const void *pixels, int flags);
API texture_t texture_checker();
API void texture_destroy(texture_t *t);
// textureLod(filename, dir, lod);
// void texture_add_loader( int(*loader)(const char *filename, int *w, int *h, int *bpp, int reqbpp, int flags) );
API unsigned texture_update(texture_t *t, unsigned w, unsigned h, unsigned n, const void *pixels, int flags);
API bool texture_rec_begin(texture_t *t, unsigned w, unsigned h); // texture_rec
API void texture_rec_end(texture_t *t); // texture_rec
// -----------------------------------------------------------------------------
// brdf
API texture_t brdf_lut();
// -----------------------------------------------------------------------------
// pbr materials
typedef struct colormap_t {
vec4 color;
texture_t *texture;
} colormap_t;
API bool colormap( colormap_t *cm, const char *pbr_material_type, bool load_as_srgb );
typedef struct pbr_material_t {
char* name;
colormap_t diffuse;
colormap_t normals;
colormap_t specular;
colormap_t albedo;
colormap_t roughness;
colormap_t metallic;
colormap_t ao;
colormap_t ambient;
colormap_t emissive;
float specular_shininess;
} pbr_material_t;
API bool pbr_material(pbr_material_t *pbr, const char *material);
API void pbr_material_destroy(pbr_material_t *m);
// -----------------------------------------------------------------------------
// fullscreen quads
API void fullscreen_quad_rgb( texture_t texture_rgb, float gamma );
API void fullscreen_quad_ycbcr( texture_t texture_YCbCr[3], float gamma );
// -----------------------------------------------------------------------------
// sprites
// texture id, position(x,y,depth sort), tint color, rotation angle
API void sprite( texture_t texture, float position[3], float rotation /*0*/, uint32_t color /*~0u*/);
// texture id, rect(x,y,w,h) is [0..1] normalized, z-index, pos(xy,scale), rotation (degrees), color (rgba)
API void sprite_rect( texture_t t, vec4 rect, float zindex, vec3 pos, float tilt_deg, unsigned tint_rgba);
// texture id, sheet(frameNumber,X,Y) (frame in a X*Y spritesheet), position(x,y,depth sort), rotation angle, offset(x,y), scale(x,y), is_additive, tint color
API void sprite_sheet( texture_t texture, float sheet[3], float position[3], float rotation, float offset[2], float scale[2], int is_additive, uint32_t rgba, int resolution_independant);
API void sprite_flush();
// -----------------------------------------------------------------------------
// tilemaps
typedef struct tileset_t {
texture_t tex; // spritesheet
unsigned tile_w, tile_h; // dimensions per tile in pixels
unsigned cols, rows; // tileset num_cols, num_rows
unsigned selected; // active tile (while editing)
} tileset_t;
API tileset_t tileset(texture_t tex, unsigned tile_w, unsigned tile_h, unsigned cols, unsigned rows);
API int tileset_ui( tileset_t t );
typedef struct tilemap_t {
int blank_chr; // transparent tile
unsigned cols, rows; // map dimensions (in tiles)
array(int) map;
vec3 position; // x,y,scale
float zindex;
float tilt;
unsigned tint;
bool is_additive;
} tilemap_t;
API tilemap_t tilemap(const char *map, int blank_chr, int linefeed_chr);
API void tilemap_render( tilemap_t m, tileset_t style );
API void tilemap_render_ext( tilemap_t m, tileset_t style, float zindex, float xy_zoom[3], float tilt, unsigned tint, bool is_additive );
// -----------------------------------------------------------------------------
// tiled maps
typedef struct tiled_t {
char *map_name;
unsigned first_gid, tilew, tileh, w, h;
bool parallax;
vec3 position;
array(bool) visible;
array(tilemap_t) layers;
array(tileset_t) sets;
array(char*) names;
} tiled_t;
API tiled_t tiled(const char *file_tmx);
API void tiled_render(tiled_t tmx, vec3 pos);
API void tiled_ui(tiled_t *t);
// -----------------------------------------------------------------------------
// spines
typedef struct spine_t spine_t;
API spine_t*spine(const char *file_json, const char *file_atlas, unsigned flags);
API void spine_skin(spine_t *p, unsigned skin);
API void spine_render(spine_t *p, vec3 offset, unsigned flags);
API void spine_animate(spine_t *p, float delta);
API void spine_ui(spine_t *p);
// -----------------------------------------------------------------------------
// cubemaps
typedef struct cubemap_t {
unsigned id; // texture id
vec3 sh[9]; // precomputed spherical harmonics coefficients
} cubemap_t;
API cubemap_t cubemap( const image_t image, int flags ); // 1 equirectangular panorama
API cubemap_t cubemap6( const image_t images[6], int flags ); // 6 cubemap faces
API void cubemap_destroy(cubemap_t *c);
API cubemap_t* cubemap_get_active();
// -----------------------------------------------------------------------------
// fbos
API unsigned fbo( unsigned texture_color, unsigned texture_depth, int wr_flags );
API void fbo_bind(unsigned id);
API void fbo_unbind();
API void fbo_destroy(unsigned id);
// -----------------------------------------------------------------------------
// shadowmaps
typedef struct shadowmap_t {
mat44 shadowmatrix;
mat44 mvp;
mat44 mv;
mat44 proj;
vec4 light_position;
int saved_fb;
int saved_viewport[4];
handle fbo, texture;
int texture_width;
} shadowmap_t;
API shadowmap_t shadowmap(int texture_width); // = 1024
API void shadowmap_destroy(shadowmap_t *s);
API void shadowmap_set_shadowmatrix(shadowmap_t *s, vec3 aLightPos, vec3 aLightAt, vec3 aLightUp, const mat44 projection);
API void shadowmap_begin(shadowmap_t *s);
API void shadowmap_end(shadowmap_t *s);
// shadowmap utils
API void shadowmatrix_proj(mat44 shm_proj, float aLightFov, float znear, float zfar);
API void shadowmatrix_ortho(mat44 shm_proj, float left, float right, float bottom, float top, float znear, float zfar);
// -----------------------------------------------------------------------------
// shaders
API unsigned shader(const char *vs, const char *fs, const char *attribs, const char *fragcolor);
API unsigned shader_geom(const char *gs, const char *vs, const char *fs, const char *attribs, const char *fragcolor);
API unsigned shader_bind(unsigned program);
API void shader_bool(const char *uniform, bool i );
API void shader_int(const char *uniform, int i);
API void shader_uint(const char *uniform, unsigned i );
API void shader_float(const char *uniform, float f);
API void shader_vec2(const char *uniform, vec2 v);
API void shader_vec3(const char *uniform, vec3 v);
API void shader_vec3v(const char *uniform, int count, vec3 *v);
API void shader_vec4(const char *uniform, vec4 v);
API void shader_mat44(const char *uniform, mat44 m);
API void shader_texture(const char *sampler, texture_t texture);
API void shader_texture_unit(const char *sampler, unsigned texture, unsigned unit);
API void shader_colormap(const char *name, colormap_t cm);
API unsigned shader_get_active();
API void shader_destroy(unsigned shader);
// compute shaders
enum ACCESS_MODE {
READ,
WRITE,
READ_WRITE
};
/// Loads the compute shader and compiles a GL program.
/// return: GL program, 0 if failed.
/// cs: shader source code
API unsigned compute(const char *cs);
/// Runs the compute program with provided global workgroup size on x y z grid.
/// wx: global workgroup size x
/// wy: global workgroup size y
/// wz: global workgroup size z
API void compute_dispatch(unsigned wx, unsigned wy, unsigned wz);
/// Binds a texture to the program
/// !!! Set `layer` to -1 to disable layered access.
/// t: texture to bind
/// unit: texture unit bind index
/// level: texture level access (MIP0, MIP1, ...)
/// layer: bind layer
/// access: texture access policy
/// see: ACCESS_MODE
API void shader_image(texture_t t, unsigned unit, unsigned level, int layer, unsigned access);
/// Binds a texture to the program
/// !!! Set `layer` to -1 to disable layered access.
/// texture: GL texture handle
/// unit: texture unit bind index
/// level: texture level access (MIP0, MIP1, ...)
/// layer: bind layer
/// texel_type: image texel format (RGBA8, RGBA32F, ...)
/// access: texture access policy
/// see: ACCESS_MODE
API void shader_image_unit(unsigned texture, unsigned unit, unsigned level, int layer, unsigned texel_type, unsigned access);
// gpu memory barriers
/// Blocks main thread until all image operations are done by the GPU.
API void image_write_barrier();
/// Blocks main thread until all memory operations are done by the GPU.
API void write_barrier();
// ssbo
/// `STATIC`, `DYNAMIC` AND `STREAM` specify the frequency at which we intend to access the data.
/// `DRAW` favors CPU->GPU operations.
/// `READ` favors GPU->CPU operations.
/// `COPY` favors CPU->GPU->CPU operations.
enum USAGE_MODE {
STATIC_DRAW,
STATIC_READ,
STATIC_COPY,
DYNAMIC_DRAW,
DYNAMIC_READ,
DYNAMIC_COPY,
STREAM_DRAW,
STREAM_READ,
STREAM_COPY
};
/// Create Shader Storage Buffer Object
/// !!! `data` can be NULL
/// data: optional pointer to data to upload
/// len: buffer size, must not be 0
/// usage: buffer usage policy
/// see: USAGE_MODE
API unsigned ssbo_create(const void *data, int len, unsigned usage);
/// Destroys an SSBO resource
API void ssbo_destroy(unsigned ssbo);
/// Updates an existing SSBO
/// !!! `len` can not exceed the original buffer size specified in `ssbo_create` !
/// offset: offset to buffer memory
/// len: amount of data to write
/// data: pointer to data we aim to write, can not be NULL
API void ssbo_update(int offset, int len, const void *data);
/// Bind an SSBO resource to the provided bind unit index
/// ssbo: resource object
/// unit: bind unit index
API void ssbo_bind(unsigned ssbo, unsigned unit);
/// Map an SSBO resource to the system memory
/// !!! Make sure to `ssbo_unmap` the buffer once done working with it.
/// access: buffer access policy
/// return: pointer to physical memory of the buffer
/// see: ACCESS_MODE
API void *ssbo_map(unsigned access);
/// Unmaps an SSBO resource
/// !!! Pointer provided by `ssbo_map` becomes invalid.
API void ssbo_unmap();
/// Unbinds an SSBO resource
API void ssbo_unbind();
// -----------------------------------------------------------------------------
// meshes (@fixme: deprecate?)
enum MESH_FLAGS {
MESH_STATIC = 0, // STATIC, DYNAMIC, STREAM // zero|single|many updates per frame
MESH_STREAM = 1,
MESH_TRIANGLE_STRIP = 2,
};
typedef struct mesh_t {
handle vao, vbo, ibo;
unsigned vertex_count;
unsigned index_count;
unsigned flags;
array(int) lod_collapse_map; // to which neighbor each vertex collapses. ie, [10] -> 7 (used by LODs) @leak
// @leaks: following members are totally unused. convenient for end-users to keep their custom datas somewhere while processing.
union {
array(unsigned) in_index;
array(vec3i) in_index3;
};
union {
array(unsigned) out_index;
array(vec3i) out_index3;
};
union {
array(float) in_vertex;
array(vec3) in_vertex3;
};
union {
array(float) out_vertex;
array(vec3) out_vertex3;
};
} mesh_t;
API mesh_t mesh();
API void mesh_update(mesh_t *m, const char *format, int vertex_stride,int vertex_count,const void *interleaved_vertex_data, int index_count,const void *index_data, int flags);
API void mesh_render(mesh_t *m);
API void mesh_render_prim(mesh_t *sm, unsigned prim);
API void mesh_destroy(mesh_t *m);
API aabb mesh_bounds(mesh_t *m);
// -----------------------------------------------------------------------------
// materials
enum MATERIAL_ENUMS {
MAX_CHANNELS_PER_MATERIAL = 8
};
typedef struct material_t {
char *name;
int count;
struct material_layer_t {
char texname[32];
handle texture;
float value;
vec4 color; // uint32_t
} layer[MAX_CHANNELS_PER_MATERIAL];
} material_t;
// -----------------------------------------------------------------------------
// shadertoys
typedef struct shadertoy_t {
handle vao, program;
int uniforms[32];
int texture_channels[4];
int frame;
float clickx, clicky;
uint64_t t;
texture_t tx;
unsigned dims;
} shadertoy_t;
API shadertoy_t shadertoy( const char *shaderfile, unsigned flags );
API shadertoy_t* shadertoy_render( shadertoy_t *s, float delta );
// -----------------------------------------------------------------------------
// anims
enum ANIM_FLAGS {
ANIM_LOOP = 1,
ANIM_DONT_RESET_AFTER_USE = 2,
};
typedef struct anim_t {
int from;
int to;
float blendtime;
unsigned flags;
float curframe;
unsigned easing;
float alpha; // refreshed at every tick
float timer; // private
bool active;
vec3 pose; // private
char* name; // debug
} anim_t;
API anim_t clip(float minframe, float maxframe, float blendtime, unsigned flags);
API anim_t loop(float minframe, float maxframe, float blendtime, unsigned flags);
//API array(anim_t) animlist(const char *filename); // @todo
// -----------------------------------------------------------------------------
// models
enum MODEL_FLAGS {
MODEL_NO_ANIMATIONS = 1,
MODEL_NO_MESHES = 2,
MODEL_NO_TEXTURES = 4,
MODEL_MATCAPS = 8,
};
typedef struct model_t {
struct iqm_t *iqm; // private
unsigned num_textures;
handle *textures;
char **texture_names;
array(material_t) materials;
unsigned num_meshes;
unsigned num_triangles;
unsigned num_joints; // num_poses;
unsigned num_anims;
unsigned num_frames;
handle program;
float curframe;
mat44 pivot;
int stride; // usually 60 bytes (12*4+4*3) for a p3 u2 n3 t4 i4B w4B c4B vertex stream
void *verts;
int num_verts;
handle vao, ibo, vbo, vao_instanced;
unsigned flags;
unsigned billboard;
float *instanced_matrices;
unsigned num_instances;
} model_t;
API model_t model(const char *filename, int flags);
API model_t model_from_mem(const void *mem, int sz, int flags);
API float model_animate(model_t, float curframe);
API float model_animate_clip(model_t, float curframe, int minframe, int maxframe, bool loop);
API float model_animate_blends(model_t m, anim_t *primary, anim_t *secondary, float delta);
API aabb model_aabb(model_t, mat44 transform);
API void model_render(model_t, mat44 proj, mat44 view, mat44 model, int shader);
API void model_render_skeleton(model_t, mat44 model);
API void model_render_instanced(model_t, mat44 proj, mat44 view, mat44 *models, int shader, unsigned count);
API void model_set_texture(model_t, texture_t t);
API bool model_get_bone_pose(model_t m, unsigned joint, mat34 *out);
API void model_destroy(model_t);
API vec3 pose(bool forward, float curframe, int minframe, int maxframe, bool loop, float *opt_retframe);
// -----------------------------------------------------------------------------
// model animations
typedef struct anims_t {
int inuse; // animation number in use
float speed; // x1.00
array(anim_t) anims; // [begin,end,flags] frames of every animation in set
} anims_t;
API anims_t animations(const char *pathfile, int flags);
// -----------------------------------------------------------------------------
// skyboxes
typedef struct skybox_t {
handle program;
mesh_t geometry;
cubemap_t cubemap;
int flags;
} skybox_t;
API skybox_t skybox(const char *panorama_or_cubemap_folder, int flags);
API int skybox_render(skybox_t *sky, mat44 proj, mat44 view);
API void skybox_destroy(skybox_t *sky);
API int skybox_push_state(skybox_t *sky, mat44 proj, mat44 view); // @to deprecate
API int skybox_pop_state(); // @to deprecate
// -----------------------------------------------------------------------------
// post-fxs
API void viewport_color(uint32_t color); // background(uint32_t) instead?
API void viewport_color3(vec3 color); // background3(vec3) instead?
API void viewport_clear(bool color, bool depth);
API void viewport_clip(vec2 from, vec2 to);
API int fx_load(const char *file);
API int fx_load_from_mem(const char *nameid, const char *content);
API void fx_begin();
API void fx_end();
API void fx_enable(int pass, int enabled);
API int fx_enabled(int pass);
API void fx_enable_all(int enabled);
API char * fx_name(int pass);
API int fx_find(const char *name);
// -----------------------------------------------------------------------------
// utils
API void* screenshot(int components); // 3 RGB, 4 RGBA, -3 BGR, -4 BGRA
API void* screenshot_async(int components); // 3 RGB, 4 RGBA, -3 BGR, -4 BGRA