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obs-shaderfilter.c
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obs-shaderfilter.c
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// Version 2.0 by Exeldro https://github.com/exeldro/obs-shaderfilter
// Version 1.21 by Charles Fettinger https://github.com/Oncorporation/obs-shaderfilter
// original version by nleseul https://github.com/nleseul/obs-shaderfilter
#include <obs-module.h>
#include <graphics/graphics.h>
#include <graphics/image-file.h>
#include <graphics/math-extra.h>
#include <util/base.h>
#include <util/dstr.h>
#include <util/darray.h>
#include <util/platform.h>
#include <float.h>
#include <limits.h>
#include <stdio.h>
#include <time.h>
#include <string.h>
#include <util/threading.h>
#include "version.h"
#define nullptr ((void *)0)
static const char *effect_template_begin = "\
uniform float4x4 ViewProj;\n\
uniform texture2d image;\n\
\n\
uniform float2 uv_offset;\n\
uniform float2 uv_scale;\n\
uniform float2 uv_pixel_interval;\n\
uniform float2 uv_size;\n\
uniform float rand_f;\n\
uniform float rand_instance_f;\n\
uniform float rand_activation_f;\n\
uniform float elapsed_time;\n\
uniform int loops;\n\
uniform float local_time;\n\
\n\
sampler_state textureSampler{\n\
Filter = Linear;\n\
AddressU = Border;\n\
AddressV = Border;\n\
BorderColor = 00000000;\n\
};\n\
\n\
struct VertData {\n\
float4 pos : POSITION;\n\
float2 uv : TEXCOORD0;\n\
};\n\
\n\
VertData mainTransform(VertData v_in)\n\
{\n\
VertData vert_out;\n\
vert_out.pos = mul(float4(v_in.pos.xyz, 1.0), ViewProj);\n\
vert_out.uv = v_in.uv * uv_scale + uv_offset;\n\
return vert_out;\n\
}\n\
\n\
float srgb_nonlinear_to_linear_channel(float u)\n\
{\n\
return (u <= 0.04045) ? (u / 12.92) : pow((u + 0.055) / 1.055, 2.4);\n\
}\n\
\n\
float3 srgb_nonlinear_to_linear(float3 v)\n\
{\n\
return float3(srgb_nonlinear_to_linear_channel(v.r),\n\
srgb_nonlinear_to_linear_channel(v.g),\n\
srgb_nonlinear_to_linear_channel(v.b));\n\
}\n\
\n";
static const char *effect_template_default_image_shader = "\n\
float4 mainImage(VertData v_in) : TARGET\n\
{\n\
return image.Sample(textureSampler, v_in.uv);\n\
}\n\
";
static const char *effect_template_default_transition_image_shader = "\n\
uniform texture2d image_a;\n\
uniform texture2d image_b;\n\
uniform float transition_time = 0.5;\n\
uniform bool convert_linear = true;\n\
\n\
float4 mainImage(VertData v_in) : TARGET\n\
{\n\
float4 a_val = image_a.Sample(textureSampler, v_in.uv);\n\
float4 b_val = image_b.Sample(textureSampler, v_in.uv);\n\
float4 rgba = lerp(a_val, b_val, transition_time);\n\
if (convert_linear)\n\
rgba.rgb = srgb_nonlinear_to_linear(rgba.rgb);\n\
return rgba;\n\
}\n\
";
static const char *effect_template_end = "\n\
technique Draw\n\
{\n\
pass\n\
{\n\
vertex_shader = mainTransform(v_in);\n\
pixel_shader = mainImage(v_in);\n\
}\n\
}\n";
struct effect_param_data {
struct dstr name;
struct dstr display_name;
struct dstr widget_type;
struct dstr description;
struct dstr group;
struct dstr path;
DARRAY(int) option_values;
DARRAY(struct dstr) option_labels;
enum gs_shader_param_type type;
gs_eparam_t *param;
gs_image_file_t *image;
gs_texrender_t *render;
obs_weak_source_t *source;
union {
long long i;
double f;
char *string;
struct vec2 vec2;
struct vec3 vec3;
struct vec4 vec4;
} value;
char *label;
union {
long long i;
double f;
} minimum;
union {
long long i;
double f;
} maximum;
union {
long long i;
double f;
} step;
};
struct shader_filter_data {
obs_source_t *context;
gs_effect_t *effect;
gs_effect_t *output_effect;
gs_texrender_t *input_texrender;
gs_texrender_t *output_texrender;
gs_eparam_t *param_output_image;
bool reload_effect;
struct dstr last_path;
bool last_from_file;
bool transition;
bool transitioning;
bool prev_transitioning;
bool use_pm_alpha;
bool rendered;
float shader_start_time;
gs_eparam_t *param_uv_offset;
gs_eparam_t *param_uv_scale;
gs_eparam_t *param_uv_pixel_interval;
gs_eparam_t *param_uv_size;
gs_eparam_t *param_elapsed_time;
gs_eparam_t *param_loops;
gs_eparam_t *param_local_time;
gs_eparam_t *param_rand_f;
gs_eparam_t *param_rand_instance_f;
gs_eparam_t *param_rand_activation_f;
gs_eparam_t *param_image;
gs_eparam_t *param_image_a;
gs_eparam_t *param_image_b;
gs_eparam_t *param_transition_time;
gs_eparam_t *param_convert_linear;
int expand_left;
int expand_right;
int expand_top;
int expand_bottom;
int total_width;
int total_height;
bool use_shader_elapsed_time;
bool no_repeat;
bool rendering;
struct vec2 uv_offset;
struct vec2 uv_scale;
struct vec2 uv_pixel_interval;
struct vec2 uv_size;
float elapsed_time;
float elapsed_time_loop;
int loops;
float local_time;
float rand_f;
float rand_instance_f;
float rand_activation_f;
DARRAY(struct effect_param_data) stored_param_list;
};
static unsigned int rand_interval(unsigned int min, unsigned int max)
{
unsigned int r;
const unsigned int range = 1 + max - min;
const unsigned int buckets = RAND_MAX / range;
const unsigned int limit = buckets * range;
/* Create equal size buckets all in a row, then fire randomly towards
* the buckets until you land in one of them. All buckets are equally
* likely. If you land off the end of the line of buckets, try again. */
do {
r = rand();
} while (r >= limit);
return min + (r / buckets);
}
static char *load_shader_from_file(const char *file_name) // add input of visited files
{
char *file_ptr = os_quick_read_utf8_file(file_name);
if (file_ptr == NULL)
return NULL;
char **lines = strlist_split(file_ptr, '\n', true);
struct dstr shader_file;
dstr_init(&shader_file);
size_t line_i = 0;
while (lines[line_i] != NULL) {
char *line = lines[line_i];
line_i++;
if (strncmp(line, "#include", 8) == 0) {
// Open the included file, place contents here.
char *pos = strrchr(file_name, '/');
const size_t length = pos - file_name + 1;
struct dstr include_path = {0};
dstr_ncopy(&include_path, file_name, length);
char *start = strchr(line, '"') + 1;
char *end = strrchr(line, '"');
dstr_ncat(&include_path, start, end - start);
char *abs_include_path = os_get_abs_path_ptr(include_path.array);
char *file_contents = load_shader_from_file(abs_include_path);
dstr_cat(&shader_file, file_contents);
dstr_cat(&shader_file, "\n");
bfree(abs_include_path);
bfree(file_contents);
dstr_free(&include_path);
} else {
// else place current line here.
dstr_cat(&shader_file, line);
dstr_cat(&shader_file, "\n");
}
}
// Add file_name to visited files
// Do stuff with the file, and populate shader_file
/*
for line in file:
if line starts with #include
get path
if path is not in visited files
include_file_contents = load_shader_from_file(path)
concat include_file_contents onto shader_file
else
concat line onto shader_file
*/
bfree(file_ptr);
strlist_free(lines);
return shader_file.array;
}
static void shader_filter_clear_params(struct shader_filter_data *filter)
{
filter->param_elapsed_time = NULL;
filter->param_uv_offset = NULL;
filter->param_uv_pixel_interval = NULL;
filter->param_uv_scale = NULL;
filter->param_uv_size = NULL;
filter->param_rand_f = NULL;
filter->param_rand_activation_f = NULL;
filter->param_rand_instance_f = NULL;
filter->param_loops = NULL;
filter->param_local_time = NULL;
filter->param_image = NULL;
filter->param_image_a = NULL;
filter->param_image_b = NULL;
filter->param_transition_time = NULL;
filter->param_convert_linear = NULL;
size_t param_count = filter->stored_param_list.num;
for (size_t param_index = 0; param_index < param_count; param_index++) {
struct effect_param_data *param = (filter->stored_param_list.array + param_index);
if (param->image) {
obs_enter_graphics();
gs_image_file_free(param->image);
obs_leave_graphics();
bfree(param->image);
param->image = NULL;
}
if (param->source) {
obs_source_t *source = obs_weak_source_get_source(param->source);
if (source) {
if ((!filter->transition || filter->prev_transitioning) && obs_source_active(filter->context))
obs_source_dec_active(source);
if ((!filter->transition || filter->prev_transitioning) && obs_source_showing(filter->context))
obs_source_dec_showing(source);
obs_source_release(source);
}
obs_weak_source_release(param->source);
param->source = NULL;
}
if (param->render) {
obs_enter_graphics();
gs_texrender_destroy(param->render);
obs_leave_graphics();
param->render = NULL;
}
dstr_free(¶m->name);
dstr_free(¶m->display_name);
dstr_free(¶m->widget_type);
dstr_free(¶m->description);
dstr_free(¶m->group);
dstr_free(¶m->path);
da_free(param->option_values);
for (size_t i = 0; i < param->option_labels.num; i++) {
dstr_free(¶m->option_labels.array[i]);
}
da_free(param->option_labels);
}
da_free(filter->stored_param_list);
}
static void load_output_effect(struct shader_filter_data *filter)
{
if (filter->output_effect != NULL) {
obs_enter_graphics();
gs_effect_destroy(filter->output_effect);
filter->output_effect = NULL;
obs_leave_graphics();
}
char *shader_text = NULL;
struct dstr filename = {0};
dstr_cat(&filename, obs_get_module_data_path(obs_current_module()));
dstr_cat(&filename, "/internal/render_output.effect");
shader_text = load_shader_from_file(filename.array);
char *errors = NULL;
dstr_free(&filename);
obs_enter_graphics();
filter->output_effect = gs_effect_create(shader_text, NULL, &errors);
obs_leave_graphics();
bfree(shader_text);
if (filter->output_effect == NULL) {
blog(LOG_WARNING, "[obs-shaderfilter] Unable to load output.effect file. Errors:\n%s",
(errors == NULL || strlen(errors) == 0 ? "(None)" : errors));
bfree(errors);
} else {
size_t effect_count = gs_effect_get_num_params(filter->output_effect);
for (size_t effect_index = 0; effect_index < effect_count; effect_index++) {
gs_eparam_t *param = gs_effect_get_param_by_idx(filter->output_effect, effect_index);
struct gs_effect_param_info info;
gs_effect_get_param_info(param, &info);
if (strcmp(info.name, "output_image") == 0) {
filter->param_output_image = param;
}
}
}
}
static void shader_filter_reload_effect(struct shader_filter_data *filter)
{
obs_data_t *settings = obs_source_get_settings(filter->context);
// First, clean up the old effect and all references to it.
filter->shader_start_time = 0.0;
shader_filter_clear_params(filter);
if (filter->effect != NULL) {
obs_enter_graphics();
gs_effect_destroy(filter->effect);
filter->effect = NULL;
obs_leave_graphics();
}
// Load text and build the effect from the template, if necessary.
char *shader_text = NULL;
bool use_template = !obs_data_get_bool(settings, "override_entire_effect");
if (obs_data_get_bool(settings, "from_file")) {
const char *file_name = obs_data_get_string(settings, "shader_file_name");
shader_text = load_shader_from_file(file_name);
} else {
shader_text = bstrdup(obs_data_get_string(settings, "shader_text"));
use_template = true;
}
struct dstr effect_text = {0};
if (use_template) {
dstr_cat(&effect_text, effect_template_begin);
}
if (shader_text) {
dstr_cat(&effect_text, shader_text);
bfree(shader_text);
}
if (use_template) {
dstr_cat(&effect_text, effect_template_end);
}
// Create the effect.
char *errors = NULL;
obs_enter_graphics();
int device_type = gs_get_device_type();
if (device_type == GS_DEVICE_OPENGL) {
dstr_replace(&effect_text, "[loop]", "");
dstr_insert(&effect_text, 0, "#define OPENGL 1\n");
}
if (effect_text.len && dstr_find(&effect_text, "#define USE_PM_ALPHA 1")) {
filter->use_pm_alpha = true;
} else {
filter->use_pm_alpha = false;
}
if (filter->effect)
gs_effect_destroy(filter->effect);
filter->effect = gs_effect_create(effect_text.array, NULL, &errors);
obs_leave_graphics();
if (filter->effect == NULL) {
blog(LOG_WARNING, "[obs-shaderfilter] Unable to create effect. Errors returned from parser:\n%s",
(errors == NULL || strlen(errors) == 0 ? "(None)" : errors));
if (errors && strlen(errors)) {
obs_data_set_string(settings, "last_error", errors);
} else {
obs_data_set_string(settings, "last_error", obs_module_text("ShaderFilter.Unknown"));
}
dstr_free(&effect_text);
bfree(errors);
goto end;
} else {
dstr_free(&effect_text);
obs_data_unset_user_value(settings, "last_error");
}
// Store references to the new effect's parameters.
da_free(filter->stored_param_list);
size_t effect_count = gs_effect_get_num_params(filter->effect);
for (size_t effect_index = 0; effect_index < effect_count; effect_index++) {
gs_eparam_t *param = gs_effect_get_param_by_idx(filter->effect, effect_index);
struct gs_effect_param_info info;
gs_effect_get_param_info(param, &info);
if (strcmp(info.name, "uv_offset") == 0) {
filter->param_uv_offset = param;
} else if (strcmp(info.name, "uv_scale") == 0) {
filter->param_uv_scale = param;
} else if (strcmp(info.name, "uv_pixel_interval") == 0) {
filter->param_uv_pixel_interval = param;
} else if (strcmp(info.name, "uv_size") == 0) {
filter->param_uv_size = param;
} else if (strcmp(info.name, "elapsed_time") == 0) {
filter->param_elapsed_time = param;
} else if (strcmp(info.name, "rand_f") == 0) {
filter->param_rand_f = param;
} else if (strcmp(info.name, "rand_activation_f") == 0) {
filter->param_rand_activation_f = param;
} else if (strcmp(info.name, "rand_instance_f") == 0) {
filter->param_rand_instance_f = param;
} else if (strcmp(info.name, "loops") == 0) {
filter->param_loops = param;
} else if (strcmp(info.name, "local_time") == 0) {
filter->param_local_time = param;
} else if (strcmp(info.name, "ViewProj") == 0) {
// Nothing.
} else if (strcmp(info.name, "image") == 0) {
filter->param_image = param;
} else if (filter->transition && strcmp(info.name, "image_a") == 0) {
filter->param_image_a = param;
} else if (filter->transition && strcmp(info.name, "image_b") == 0) {
filter->param_image_b = param;
} else if (filter->transition && strcmp(info.name, "transition_time") == 0) {
filter->param_transition_time = param;
} else if (filter->transition && strcmp(info.name, "convert_linear") == 0) {
filter->param_convert_linear = param;
} else {
struct effect_param_data *cached_data = da_push_back_new(filter->stored_param_list);
dstr_copy(&cached_data->name, info.name);
cached_data->type = info.type;
cached_data->param = param;
da_init(cached_data->option_values);
da_init(cached_data->option_labels);
const size_t annotation_count = gs_param_get_num_annotations(param);
for (size_t annotation_index = 0; annotation_index < annotation_count; annotation_index++) {
gs_eparam_t *annotation = gs_param_get_annotation_by_idx(param, annotation_index);
void *annotation_default = gs_effect_get_default_val(annotation);
gs_effect_get_param_info(annotation, &info);
if (strcmp(info.name, "name") == 0 && info.type == GS_SHADER_PARAM_STRING) {
dstr_copy(&cached_data->display_name, (const char *)annotation_default);
} else if (strcmp(info.name, "label") == 0 && info.type == GS_SHADER_PARAM_STRING) {
dstr_copy(&cached_data->display_name, (const char *)annotation_default);
} else if (strcmp(info.name, "widget_type") == 0 && info.type == GS_SHADER_PARAM_STRING) {
dstr_copy(&cached_data->widget_type, (const char *)annotation_default);
} else if (strcmp(info.name, "group") == 0 && info.type == GS_SHADER_PARAM_STRING) {
dstr_copy(&cached_data->group, (const char *)annotation_default);
} else if (strcmp(info.name, "minimum") == 0) {
if (info.type == GS_SHADER_PARAM_FLOAT || info.type == GS_SHADER_PARAM_VEC2 ||
info.type == GS_SHADER_PARAM_VEC3 || info.type == GS_SHADER_PARAM_VEC4) {
cached_data->minimum.f = *(float *)annotation_default;
} else if (info.type == GS_SHADER_PARAM_INT) {
cached_data->minimum.i = *(int *)annotation_default;
}
} else if (strcmp(info.name, "maximum") == 0) {
if (info.type == GS_SHADER_PARAM_FLOAT || info.type == GS_SHADER_PARAM_VEC2 ||
info.type == GS_SHADER_PARAM_VEC3 || info.type == GS_SHADER_PARAM_VEC4) {
cached_data->maximum.f = *(float *)annotation_default;
} else if (info.type == GS_SHADER_PARAM_INT) {
cached_data->maximum.i = *(int *)annotation_default;
}
} else if (strcmp(info.name, "step") == 0) {
if (info.type == GS_SHADER_PARAM_FLOAT || info.type == GS_SHADER_PARAM_VEC2 ||
info.type == GS_SHADER_PARAM_VEC3 || info.type == GS_SHADER_PARAM_VEC4) {
cached_data->step.f = *(float *)annotation_default;
} else if (info.type == GS_SHADER_PARAM_INT) {
cached_data->step.i = *(int *)annotation_default;
}
} else if (strncmp(info.name, "option_", 7) == 0) {
int id = atoi(info.name + 7);
if (info.type == GS_SHADER_PARAM_INT) {
int val = *(int *)annotation_default;
int *cd = da_insert_new(cached_data->option_values, id);
*cd = val;
} else if (info.type == GS_SHADER_PARAM_STRING) {
struct dstr val = {0};
dstr_copy(&val, (const char *)annotation_default);
struct dstr *cs = da_insert_new(cached_data->option_labels, id);
*cs = val;
}
}
bfree(annotation_default);
}
}
}
end:
obs_data_release(settings);
}
static const char *shader_filter_get_name(void *unused)
{
UNUSED_PARAMETER(unused);
return obs_module_text("ShaderFilter");
}
static void *shader_filter_create(obs_data_t *settings, obs_source_t *source)
{
struct shader_filter_data *filter = bzalloc(sizeof(struct shader_filter_data));
filter->context = source;
filter->reload_effect = true;
dstr_init(&filter->last_path);
dstr_copy(&filter->last_path, obs_data_get_string(settings, "shader_file_name"));
filter->last_from_file = obs_data_get_bool(settings, "from_file");
filter->rand_instance_f = (float)((double)rand_interval(0, 10000) / (double)10000);
filter->rand_activation_f = (float)((double)rand_interval(0, 10000) / (double)10000);
da_init(filter->stored_param_list);
load_output_effect(filter);
obs_source_update(source, settings);
return filter;
}
static void shader_filter_destroy(void *data)
{
struct shader_filter_data *filter = data;
shader_filter_clear_params(filter);
obs_enter_graphics();
if (filter->effect)
gs_effect_destroy(filter->effect);
if (filter->output_effect)
gs_effect_destroy(filter->output_effect);
if (filter->input_texrender)
gs_texrender_destroy(filter->input_texrender);
if (filter->output_texrender)
gs_texrender_destroy(filter->output_texrender);
obs_leave_graphics();
dstr_free(&filter->last_path);
da_free(filter->stored_param_list);
bfree(filter);
}
static bool shader_filter_from_file_changed(obs_properties_t *props, obs_property_t *p, obs_data_t *settings)
{
UNUSED_PARAMETER(p);
struct shader_filter_data *filter = obs_properties_get_param(props);
bool from_file = obs_data_get_bool(settings, "from_file");
obs_property_set_visible(obs_properties_get(props, "shader_text"), !from_file);
obs_property_set_visible(obs_properties_get(props, "shader_file_name"), from_file);
if (from_file != filter->last_from_file) {
filter->reload_effect = true;
}
filter->last_from_file = from_file;
return true;
}
static bool shader_filter_text_changed(obs_properties_t *props, obs_property_t *p, obs_data_t *settings)
{
UNUSED_PARAMETER(p);
struct shader_filter_data *filter = obs_properties_get_param(props);
if (!filter)
return false;
const char *shader_text = obs_data_get_string(settings, "shader_text");
bool can_convert = strstr(shader_text, "void mainImage( out vec4") || strstr(shader_text, "void mainImage(out vec4") ||
strstr(shader_text, "void main()") || strstr(shader_text, "vec4 effect(vec4");
obs_property_t *shader_convert = obs_properties_get(props, "shader_convert");
bool visible = obs_property_visible(obs_properties_get(props, "shader_text"));
if (obs_property_visible(shader_convert) != (can_convert && visible)) {
obs_property_set_visible(shader_convert, can_convert && visible);
return true;
}
return false;
}
static bool shader_filter_file_name_changed(obs_properties_t *props, obs_property_t *p, obs_data_t *settings)
{
struct shader_filter_data *filter = obs_properties_get_param(props);
const char *new_file_name = obs_data_get_string(settings, obs_property_name(p));
if ((dstr_is_empty(&filter->last_path) && strlen(new_file_name)) ||
(filter->last_path.array && dstr_cmp(&filter->last_path, new_file_name) != 0)) {
filter->reload_effect = true;
dstr_copy(&filter->last_path, new_file_name);
size_t l = strlen(new_file_name);
if (l > 7 && strncmp(new_file_name + l - 7, ".effect", 7) == 0) {
obs_data_set_bool(settings, "override_entire_effect", true);
} else if (l > 7 && strncmp(new_file_name + l - 7, ".shader", 7) == 0) {
obs_data_set_bool(settings, "override_entire_effect", false);
}
}
return false;
}
static bool use_shader_elapsed_time_changed(obs_properties_t *props, obs_property_t *p, obs_data_t *settings)
{
UNUSED_PARAMETER(p);
struct shader_filter_data *filter = obs_properties_get_param(props);
bool use_shader_elapsed_time = obs_data_get_bool(settings, "use_shader_elapsed_time");
if (use_shader_elapsed_time != filter->use_shader_elapsed_time) {
filter->reload_effect = true;
}
filter->use_shader_elapsed_time = use_shader_elapsed_time;
return false;
}
static bool shader_filter_reload_effect_clicked(obs_properties_t *props, obs_property_t *property, void *data)
{
UNUSED_PARAMETER(props);
UNUSED_PARAMETER(property);
struct shader_filter_data *filter = data;
filter->reload_effect = true;
obs_source_update(filter->context, NULL);
return false;
}
static bool add_source_to_list(void *data, obs_source_t *source)
{
obs_property_t *p = data;
const char *name = obs_source_get_name(source);
size_t count = obs_property_list_item_count(p);
size_t idx = 0;
while (idx < count && strcmp(name, obs_property_list_item_string(p, idx)) > 0)
idx++;
obs_property_list_insert_string(p, idx, name, name);
return true;
}
static bool is_var_char(char ch)
{
return (ch >= '0' && ch <= '9') || (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') || ch == '_';
}
static void convert_if_defined(struct dstr *effect_text)
{
char *pos = strstr(effect_text->array, "#if defined(");
while (pos) {
size_t diff = pos - effect_text->array;
char *ch = strstr(effect_text->array + diff + 12, ")\n");
pos = strstr(effect_text->array + diff + 12, "#if defined(");
if (ch && (!pos || ch < pos)) {
*ch = ' ';
dstr_remove(effect_text, diff, 12);
dstr_insert(effect_text, diff, "#ifdef ");
pos = strstr(effect_text->array + diff + 5, "#if defined(");
}
}
}
static void convert_atan(struct dstr *effect_text)
{
char *pos = strstr(effect_text->array, "atan(");
while (pos) {
if (is_var_char(*(pos - 1))) {
pos = strstr(pos + 5, "atan(");
continue;
}
size_t diff = pos - effect_text->array;
char *comma = strstr(pos + 5, ",");
char *divide = strstr(pos + 5, "/");
if (!comma && !divide)
return;
int depth = 0;
char *open = strstr(pos + 5, "(");
char *close = strstr(pos + 5, ")");
if (!close)
return;
do {
while (open && open < close) {
depth++;
open = strstr(open + 1, "(");
}
while (depth > 0 && close && (!open || close < open)) {
depth--;
if (depth == 0 && (!comma || comma < close))
comma = strstr(close + 1, ",");
if (depth == 0 && (!divide || divide < close))
divide = strstr(close + 1, "/");
if (comma && open && comma > open && comma < close)
comma = NULL;
if (divide && open && divide > open && divide < close)
divide = NULL;
open = strstr(close + 1, "(");
close = strstr(close + 1, ")");
}
} while (depth > 0 && close);
if (close && comma && comma < close && (!open || comma < open)) {
//*comma = '/';
dstr_insert(effect_text, diff + 4, "2");
}
if (close && divide && divide < close && (!open || divide < open)) {
*divide = ',';
dstr_insert(effect_text, diff + 4, "2");
}
pos = strstr(effect_text->array + diff + 5, "atan(");
}
}
static void insert_begin_of_block(struct dstr *effect_text, size_t diff, char *insert)
{
int depth = 0;
char *ch = effect_text->array + diff;
while (ch > effect_text->array && (*ch == ' ' || *ch == '\t'))
ch--;
while (ch > effect_text->array) {
while (*ch != '=' && *ch != '(' && *ch != ')' && *ch != '+' && *ch != '-' && *ch != '/' && *ch != '*' &&
*ch != ' ' && *ch != '\t' && ch > effect_text->array)
ch--;
if (*ch == '(') {
if (depth == 0) {
dstr_insert(effect_text, ch - effect_text->array + 1, insert);
return;
}
ch--;
depth--;
} else if (*ch == ')') {
ch--;
depth++;
} else if (*ch == '=') {
dstr_insert(effect_text, ch - effect_text->array + 1, insert);
return;
} else if (*ch == '+' || *ch == '-' || *ch == '/' || *ch == '*' || *ch == ' ' || *ch == '\t') {
if (depth == 0) {
dstr_insert(effect_text, ch - effect_text->array + 1, insert);
return;
}
ch--;
}
}
}
static void insert_end_of_block(struct dstr *effect_text, size_t diff, char *insert)
{
int depth = 0;
char *ch = effect_text->array + diff;
while (*ch == ' ' || *ch == '\t')
ch++;
while (*ch != 0) {
while (*ch != ';' && *ch != '(' && *ch != ')' && *ch != '+' && *ch != '-' && *ch != '/' && *ch != '*' &&
*ch != ' ' && *ch != '\t' && *ch != ',' && *ch != 0)
ch++;
if (*ch == '(') {
ch++;
depth++;
} else if (*ch == ')') {
if (depth == 0) {
dstr_insert(effect_text, ch - effect_text->array, insert);
return;
}
ch++;
depth--;
} else if (*ch == ';') {
dstr_insert(effect_text, ch - effect_text->array, insert);
return;
} else if (*ch == '+' || *ch == '-' || *ch == '/' || *ch == '*' || *ch == ' ' || *ch == '\t' || *ch == ',') {
if (depth == 0) {
dstr_insert(effect_text, ch - effect_text->array, insert);
return;
}
ch++;
}
}
}
static void convert_mat_mul_var(struct dstr *effect_text, struct dstr *var_function_name)
{
char *pos = strstr(effect_text->array, var_function_name->array);
while (pos) {
if (is_var_char(*(pos - 1)) || is_var_char(*(pos + var_function_name->len))) {
pos = strstr(pos + var_function_name->len, var_function_name->array);
continue;
}
size_t diff = pos - effect_text->array;
char *ch = pos + var_function_name->len;
while (*ch == ' ' || *ch == '\t')
ch++;
if (*ch == '*' && *(ch + 1) != '=') {
size_t diff3 = ch - effect_text->array + 1;
*ch = ',';
insert_end_of_block(effect_text, diff3, ")");
dstr_insert(effect_text, diff, "mul(");
pos = strstr(effect_text->array + diff + 4 + var_function_name->len, var_function_name->array);
continue;
}
ch = pos - 1;
while ((*ch == ' ' || *ch == '\t') && ch > effect_text->array)
ch--;
if (*ch == '=' && *(ch - 1) == '*') {
char *end = ch - 2;
while ((*end == ' ' || *end == '\t') && end > effect_text->array)
end--;
char *start = end;
while ((is_var_char(*start) || *start == '.') && start > effect_text->array)
start--;
start++;
end++;
diff = ch - 1 - effect_text->array;
struct dstr insert = {0};
dstr_init_copy(&insert, "= mul(");
dstr_ncat(&insert, start, end - start);
dstr_cat(&insert, ",");
dstr_remove(effect_text, diff, 2);
dstr_insert(effect_text, diff, insert.array);
char *line_end = effect_text->array + diff;
while (*line_end != ';' && *line_end != 0)
line_end++;
dstr_insert(effect_text, line_end - effect_text->array, ")");
pos = strstr(effect_text->array + diff + insert.len + 1 + var_function_name->len, var_function_name->array);
dstr_free(&insert);
continue;
} else if (*ch == '*') {
size_t diff2 = ch - effect_text->array - 1;
*ch = ',';
insert_end_of_block(effect_text, diff + var_function_name->len, ")");
insert_begin_of_block(effect_text, diff2, "mul(");
pos = strstr(effect_text->array + diff + 4 + var_function_name->len, var_function_name->array);
continue;
}
pos = strstr(effect_text->array + diff + var_function_name->len, var_function_name->array);
}
}
static void convert_mat_mul(struct dstr *effect_text, char *var_type)
{
size_t len = strlen(var_type);
char *pos = strstr(effect_text->array, var_type);
while (pos) {
if (is_var_char(*(pos - 1))) {
pos = strstr(pos + len, var_type);
continue;
}
size_t diff = pos - effect_text->array;
char *begin = pos + len;
if (*begin == '(') {
char *ch = pos - 1;
while ((*ch == ' ' || *ch == '\t') && ch > effect_text->array)
ch--;
if (*ch == '=' && *(ch - 1) == '*') {
// mat constructor with *= in front of it
char *end = ch - 2;
while ((*end == ' ' || *end == '\t') && end > effect_text->array)
end--;
char *start = end;
while ((is_var_char(*start) || *start == '.') && start > effect_text->array)
start--;
start++;
end++;
size_t diff2 = ch - effect_text->array - 1;
struct dstr insert = {0};
dstr_init_copy(&insert, "= mul(");
dstr_ncat(&insert, start, end - start);
dstr_cat(&insert, ",");
dstr_remove(effect_text, diff2, 2);
dstr_insert(effect_text, diff2, insert.array);
char *line_end = effect_text->array + diff2;
while (*line_end != ';' && *line_end != 0)
line_end++;
dstr_insert(effect_text, line_end - effect_text->array, ")");
pos = strstr(effect_text->array + diff + insert.len + len + 1, var_type);
dstr_free(&insert);
continue;
} else if (*ch == '*') {
// mat constructor with * in front of it
size_t diff2 = ch - effect_text->array - 1;
*ch = ',';
insert_end_of_block(effect_text, diff + len, ")");
insert_begin_of_block(effect_text, diff2, "mul(");
pos = strstr(effect_text->array + diff + len + 4, var_type);
continue;
}
int depth = 1;
ch = begin + 1;
while (*ch != 0) {
while (*ch != ';' && *ch != '(' && *ch != ')' && *ch != '+' && *ch != '-' && *ch != '/' &&
*ch != '*' && *ch != 0)
ch++;
if (*ch == '(') {
ch++;
depth++;
} else if (*ch == ')') {
if (depth == 0) {
break;
}
ch++;
depth--;
} else if (*ch == '*') {
if (depth == 0) {
//mat constructor follow by *
*ch = ',';
insert_end_of_block(effect_text, ch - effect_text->array + 1, ")");
dstr_insert(effect_text, diff, "mul(");
break;
}
ch++;
} else if (*ch == ';') {