shader.c File Reference

#include "shader.h"
#include "app_settings.h"
#include "glad/glad.h"
#include "io.h"
#include "log.h"
#include "utils.h"
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

Include dependency graph for shader.c:

Data Structures
struct	LoadedBuffer
struct	Chunk
struct	IncludeContext

Macros
#define	CLEANUP_CTX   __attribute__((cleanup(ctx_free)))

Enumerations
enum	{ INFO_LOG_SIZE = 512 }
enum	{ MAX_SHADER_NAME_LEN = 256 }
enum	{ SHADER_LABEL_BUFFER_SIZE = 512 }
enum	{ MAX_INCLUDE_DEPTH = 16 }
enum	{ MAX_SHADER_SOURCE_SIZE = 16 * 1024 * 1024 }
enum	{ PATH_BUFFER_SIZE = 256 }
enum	{ RESOLVED_PATH_BUFFER_SIZE = 512 }
enum	{ HEADER_TAG_LEN = 7 }
enum	{ MAX_DEFINES = 32 }

Functions
static bool	process_source (IncludeContext *ctx, const char *current_file_src, const char *current_file_path)
static void	ctx_add_buffer (IncludeContext *ctx, char *data)
static bool	ctx_add_chunk (IncludeContext *ctx, const char *ptr, size_t len)
static void	ctx_free (IncludeContext *ctx)
static bool	get_dir_from_path (const char *path, char *out_dir, size_t size)
static bool	resolve_and_parse_include (IncludeContext *ctx, const char *path_term, const char *current_file_path)
static const char *	parse_include_path (const char *args, char *out_path, size_t size)
static char *	inject_defines_into_source (const char *buffer, size_t file_size, const char **defines, int count)
char *	shader_read_file_with_defines (const char *path, const char **defines, int count)
	Reads a shader file and injects defines. More...
char *	shader_read_file (const char *path)
	Reads a shader file into RAM, processing all includes. More...
static GLuint	shader_compile_with_defines (const char *path, GLenum type, const char **defines, int count)
GLuint	shader_compile (const char *path, GLenum type)
	Compiles a single shader stage from a file. More...
static GLuint	shader_load_program_with_defines (const char *vertex_path, const char *fragment_path, const char **defines, int count)
GLuint	shader_load_program (const char *vertex_path, const char *fragment_path)
	Helper to load a classic Vertex+Fragment program from disk. More...
GLuint	shader_load_compute (const char *compute_path)
	Helper to load a compute program from disk. More...
static int	cmp_uniform_entry (const void *lhs, const void *rhs)
static void	shader_cache_uniforms (Shader *shader)
static Shader *	shader_create_from_program (GLuint program, const char *name)
Shader *	shader_load (const char *vertex_path, const char *fragment_path)
	Loads a linked program and caches all its active uniforms. More...
Shader *	shader_load_with_defines (const char *vertex_path, const char *fragment_path, const char **defines, int count)
	Special loader that injects #define directives before compilation. More...
Shader *	shader_load_compute_program (const char *compute_path)
	Loads a compute program and caches its uniforms. More...
void	shader_destroy (Shader *shader)
	Destroys the shader wrapper and deletes the GL program. More...
void	shader_use (Shader *shader)
	Activates the program for subsequent draw calls (glUseProgram). More...
GLint	shader_get_uniform_location (Shader *shader, const char *name)
	Retrieves a uniform location via binary search on the cache. More...
void	shader_set_int (Shader *shader, const char *name, int val)
void	shader_set_float (Shader *shader, const char *name, float val)
void	shader_set_vec2 (Shader *shader, const char *name, const float *val)
void	shader_set_vec3 (Shader *shader, const char *name, const float *val)
void	shader_set_vec4 (Shader *shader, const char *name, const float *val)
void	shader_set_mat4 (Shader *shader, const char *name, const float *val)
void	shader_set_int_loc (GLint loc, int val)
void	shader_set_float_loc (GLint loc, float val)
void	shader_set_vec2_loc (GLint loc, const float *val)
void	shader_set_vec3_loc (GLint loc, const float *val)
void	shader_set_vec4_loc (GLint loc, const float *val)
void	shader_set_mat4_loc (GLint loc, const float *val)

Macro Definition Documentation

CLEANUP_CTX

#define CLEANUP_CTX   __attribute__((cleanup(ctx_free)))

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
INFO_LOG_SIZE

anonymous enum

anonymous enum

Enumerator
MAX_SHADER_NAME_LEN

anonymous enum

anonymous enum

Enumerator
SHADER_LABEL_BUFFER_SIZE

anonymous enum

anonymous enum

Enumerator
MAX_INCLUDE_DEPTH

anonymous enum

anonymous enum

Enumerator
MAX_SHADER_SOURCE_SIZE

anonymous enum

anonymous enum

Enumerator
PATH_BUFFER_SIZE

anonymous enum

anonymous enum

Enumerator
RESOLVED_PATH_BUFFER_SIZE

anonymous enum

anonymous enum

Enumerator
HEADER_TAG_LEN

anonymous enum

anonymous enum

Enumerator
MAX_DEFINES

Function Documentation

cmp_uniform_entry()

static int cmp_uniform_entry ( const void *  lhs, const void *  rhs  )

static

ctx_add_buffer()

static void ctx_add_buffer ( IncludeContext *  ctx, char *  data  )

static

ctx_add_chunk()

static bool ctx_add_chunk ( IncludeContext *  ctx, const char *  ptr, size_t  len  )

static

ctx_free()

static void ctx_free ( IncludeContext *  ctx )

static

get_dir_from_path()

static bool get_dir_from_path ( const char *  path, char *  out_dir, size_t  size  )

static

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inject_defines_into_source()

static char* inject_defines_into_source ( const char *  buffer, size_t  file_size, const char **  defines, int  count  )

static

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parse_include_path()

static const char* parse_include_path ( const char *  args, char *  out_path, size_t  size  )

static

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process_source()

static bool process_source ( IncludeContext *  ctx, const char *  current_file_src, const char *  current_file_path  )

static

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resolve_and_parse_include()

static bool resolve_and_parse_include ( IncludeContext *  ctx, const char *  path_term, const char *  current_file_path  )

static

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shader_cache_uniforms()

static void shader_cache_uniforms ( Shader *  shader )

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shader_compile()

GLuint shader_compile	(	const char *	path,
		GLenum	type
	)

Compiles a single shader stage from a file.

Supports recursive @header inclusion syntax.

Parameters

path	Path to the shader source file.
type	GL_VERTEX_SHADER, GL_FRAGMENT_SHADER, or GL_COMPUTE_SHADER.

Returns

GLuint handle of the compiled shader stage.

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shader_compile_with_defines()

static GLuint shader_compile_with_defines ( const char *  path, GLenum  type, const char **  defines, int  count  )

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shader_create_from_program()

static Shader* shader_create_from_program ( GLuint  program, const char *  name  )

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shader_destroy()

void shader_destroy

(

Shader *

shader

)

Destroys the shader wrapper and deletes the GL program.

Parameters

shader

Pointer to the object to free.

shader_get_uniform_location()

GLint shader_get_uniform_location	(	Shader *	shader,
		const char *	name
	)

Retrieves a uniform location via binary search on the cache.

Parameters

shader	Pointer to the wrapper.
name	Uniform identifier.

Returns

GL location, or -1 if not found.

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shader_load()

Shader* shader_load	(	const char *	vertex_path,
		const char *	fragment_path
	)

Loads a linked program and caches all its active uniforms.

Parameters

vertex_path	Path to vertex source.
fragment_path	Path to fragment source.

Returns

Pointer to the Shader object.

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shader_load_compute()

GLuint shader_load_compute

(

const char *

compute_path

)

Helper to load a compute program from disk.

Returns

GLuint program handle.

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shader_load_compute_program()

Shader* shader_load_compute_program

(

const char *

compute_path

)

Loads a compute program and caches its uniforms.

Parameters

compute_path

Path to compute source.

Returns

Pointer to the Shader object.

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shader_load_program()

GLuint shader_load_program	(	const char *	vertex_path,
		const char *	fragment_path
	)

Helper to load a classic Vertex+Fragment program from disk.

Returns

GLuint program handle.

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shader_load_program_with_defines()

static GLuint shader_load_program_with_defines ( const char *  vertex_path, const char *  fragment_path, const char **  defines, int  count  )

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shader_load_with_defines()

Shader* shader_load_with_defines	(	const char *	vertex_path,
		const char *	fragment_path,
		const char **	defines,
		int	count
	)

Special loader that injects #define directives before compilation.

Parameters

vertex_path	Vertex source.
fragment_path	Fragment source.
defines	Array of macro strings (e.g. "BLOOM_ENABLED").
count	Number of macros.

Returns

Specialized Shader object.

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shader_read_file()

char* shader_read_file

(

const char *

path

)

Reads a shader file into RAM, processing all includes.

Parameters

path	Absolute or relative path.

Returns

Heap-allocated null-terminated string. Result must be freed.

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shader_read_file_with_defines()

char* shader_read_file_with_defines	(	const char *	path,
		const char **	defines,
		int	count
	)

Reads a shader file and injects defines.

Parameters

path	Path to source.
defines	Array of macro strings.
count	Number of macros.

Returns

Heap-allocated result.

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shader_set_float()

void shader_set_float	(	Shader *	shader,
		const char *	name,
		float	val
	)

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shader_set_float_loc()

void shader_set_float_loc	(	GLint	loc,
		float	val
	)

shader_set_int()

void shader_set_int	(	Shader *	shader,
		const char *	name,
		int	val
	)

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shader_set_int_loc()

void shader_set_int_loc	(	GLint	loc,
		int	val
	)

shader_set_mat4()

void shader_set_mat4	(	Shader *	shader,
		const char *	name,
		const float *	val
	)

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shader_set_mat4_loc()

void shader_set_mat4_loc	(	GLint	loc,
		const float *	val
	)

shader_set_vec2()

void shader_set_vec2	(	Shader *	shader,
		const char *	name,
		const float *	val
	)

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shader_set_vec2_loc()

void shader_set_vec2_loc	(	GLint	loc,
		const float *	val
	)

shader_set_vec3()

void shader_set_vec3	(	Shader *	shader,
		const char *	name,
		const float *	val
	)

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shader_set_vec3_loc()

void shader_set_vec3_loc	(	GLint	loc,
		const float *	val
	)

shader_set_vec4()

void shader_set_vec4	(	Shader *	shader,
		const char *	name,
		const float *	val
	)

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shader_set_vec4_loc()

void shader_set_vec4_loc	(	GLint	loc,
		const float *	val
	)

shader_use()

void shader_use

(

Shader *

shader

)

Activates the program for subsequent draw calls (glUseProgram).

Parameters

shader

Pointer to the wrapper.