wip demo mode and base tempo

README.md

@@ -50,16 +50,19 @@ make install
 ## CLI arguments
 
 ```txt
-usage: forge [-h] [-v] [-hr] [-s=SCREEN] [-f=FRAG_PATH] 
+usage: forge [-h] [-v] [-hr] [-s=SCREEN] [-f=DIR_PATH] [-fc=CFG_PATH] [-t=TEMPO] [--demo] 
 
 Fusion Of Real-time Generative Effects.
 
 options:
-  -h, --help         show this help message and exit
-  -v, --version      print version
-  -hr, --hot-reload  hot reload of shaders scripts
-  -s, --screen       output screen number (default: primary)
-  -f, --frag         fragment shader path (default: TODO)
+  -h, --help          show this help message and exit
+  -v, --version       print version
+  -hr, --hot-reload   hot reload of shaders scripts
+  -s, --screen        output screen number (default: primary)
+  -f, --frag          fragment shaders directory (default: TODO)
+  -fc, --frag-config  fragment shaders config file (default: TODO)
+  -t, --tempo         base tempo (default: 120)
+  --demo              demonstration mode
 ```
 
 ## Release guide
@@ -99,7 +102,7 @@ make -f Makefile.dev release-arch
   - [x] Select screen as argument / config
   - [x] fps in window title
   - [x] Clean code
-- [x] Multi-stage shaders
+- [ ] Multi-stage shaders
   - [x] Test 2 stages with render to texture
   - [x] 2 in 2 fx 1 mix 1 fx layout
   - [x] Include common code
@@ -109,7 +112,7 @@ make -f Makefile.dev release-arch
     - [x] uniform config
     - [x] fragment config
     - [x] subroutines config
-  - [x] Clean code
+  - [ ] Clean code and fix things
 - [ ] Midi
   - [ ] Read Midi events
   - [ ] Read midi mapping config file
@@ -117,14 +120,14 @@ make -f Makefile.dev release-arch
   - [ ] Save midi state
   - [ ] State machine with A/B switch
   - [ ] Tap-tempo feature
-  - [ ] Clean code
+  - [ ] Clean code and fix things
 - [ ] Video input
   - [ ] Fixed camera video
   - [ ] Video mapping config file
-  - [ ] Clean code
+  - [ ] Clean code and fix things
 - [ ] Monitor screen
   - [ ] 2nd window
-  - [ ] Use buffers as panels (INA A FXA / DEBUG A+B FXA+B / INB B FXB)
-  - [ ] Clean code
+  - [x] Use buffers as panels (INA A FXA / DEBUG A+B FXA+B / INB B FXB)
+  - [ ] Clean code and fix things
 - [ ] Packaging & install
   - [ ] Clone "shaders" and config in system path at setup

config/shaders.cfg

@@ -1,6 +1,7 @@
 UNIFORM_TIME=iTime
 UNIFORM_TEMPO=iTempo
 UNIFORM_FPS=iFPS
+UNIFORM_DEMO=iDemo
 UNIFORM_RESOLUTION=iResolution
 UNIFORM_TEX_PREFIX=tex
 

shaders/frag0.glsl

@@ -10,6 +10,7 @@ uniform float iTime;
 uniform float iTempo;
 uniform int iFPS;
 uniform vec2 iResolution;
+uniform int iDemo;
 
 // 2. textures
 // ---------------
@@ -166,8 +167,8 @@ float cosTime(float k)
 vec2 magic_f(vec2 F, vec3 B, float i)
 {
     return vec2(
-        mix(F.x, randTime(i + 1), B.z),
-        mix(F.y, randTime(i + 2), B.z)
+        mix(F.x, randTime(i + 1), B.z + iDemo),
+        mix(F.y, randTime(i + 2), B.z + iDemo)
     );
 }
 
@@ -179,9 +180,9 @@ vec2 magic_f(float i)
 vec3 magic_b(vec3 B, float i)
 {
     return vec3(
-        mix(B.x, step(0.2, randTime(i + 3)), B.z),
-        mix(B.y, step(0.5, randTime(i + 4)), B.z),
-        B.z
+        mix(B.x, step(0.2, randTime(i + 3)), B.z + iDemo),
+        mix(B.y, step(0.5, randTime(i + 4)), B.z + iDemo),
+        min(1, B.z + iDemo)
     );
 }
 
@@ -1250,6 +1251,8 @@ subroutine(src_stage_sub) vec4 src_16(vec2 vUV, const float seed)
     // controls
 
     // logic
+
+    // TODO tmp
     
     return vec4(0.0);
 }

src/args.c

@@ -19,6 +19,8 @@ static void print_help(int status_code) {
        "[-s=SCREEN] "
        "[-f=DIR_PATH] "
        "[-fc=CFG_PATH] "
+       "[-t=TEMPO] "
+       "[--demo] "
        "\n\n"
        "Fusion Of Real-time Generative Effects.\n\n"
        "options:\n"
@@ -27,7 +29,9 @@ static void print_help(int status_code) {
        "  -hr, --hot-reload   hot reload of shaders scripts\n"
        "  -s, --screen        output screen number (default: primary)\n"
        "  -f, --frag          fragment shaders directory (default: TODO)\n"
-       "  -fc, --frag-config  fragment shaders config file (default: TODO)\n");
+       "  -fc, --frag-config  fragment shaders config file (default: TODO)\n"
+       "  -t, --tempo         base tempo (default: 120)\n"
+       "  --demo              demonstration mode\n");
   exit(status_code);
 }
 
@@ -59,6 +63,17 @@ static unsigned char parse_uchar(char *arg, char *value) {
   return (unsigned char)tmp_value;
 }
 
+static unsigned short parse_ushort(char *arg, char *value) {
+  if (!string_is_number(value)) {
+    invalid_value(arg, value);
+  }
+  unsigned long long tmp_value = (unsigned long long)atoll(value);
+  if (tmp_value >= 65536) {
+    invalid_value(arg, value);
+  }
+  return (unsigned short)tmp_value;
+}
+
 Parameters args_parse(int argc, char **argv) {
   Parameters params;
   int i;
@@ -69,6 +84,8 @@ Parameters args_parse(int argc, char **argv) {
   params.frag_path = 0;
   params.frag_config_path = 0;
   params.hot_reload = false;
+  params.base_tempo = 120.0f;
+  params.demo = false;
 
   for (i = 1; i < argc; i++) {
     arg = argv[i];
@@ -86,6 +103,10 @@ Parameters args_parse(int argc, char **argv) {
       params.frag_path = value;
     } else if (is_arg(arg, "-fc") || is_arg(arg, "--frag-config")) {
       params.frag_config_path = value;
+    } else if (is_arg(arg, "-t") || is_arg(arg, "--tempo")) {
+      params.base_tempo = (float)parse_ushort(arg, value);
+    } else if (is_arg(arg, "--demo")) {
+      params.demo = true;
     } else {
       invalid_arg(arg);
     }

src/forge.c

@@ -41,6 +41,24 @@ static unsigned int compute_fps(Window *window, Timer *timer) {
   return (unsigned int)round(fps);
 }
 
+static void init_context(ShaderProgram program, Context *context,
+                         Parameters params) {
+  int size;
+  context->tempo = params.base_tempo;
+  context->demo = params.demo;
+
+  // TODO temporary state
+  size = program.frag_count * program.sub_type_count * sizeof(unsigned int);
+  context->sub_state = malloc(size);
+  memset(context->sub_state, 0, size);
+  context->sub_state[program.sub_type_count * 0 + 0] = 1;
+  context->sub_state[program.sub_type_count * 1 + 0] = 1;
+  context->sub_state[program.sub_type_count * 2 + 1] = 1;
+  context->sub_state[program.sub_type_count * 3 + 1] = 3;
+  context->sub_state[program.sub_type_count * 5 + 1] = 6;
+  // TODO fix here ??
+}
+
 static void hot_reload(ShaderProgram program, File *common_shader_code,
                        File *fragment_shaders) {
   unsigned int i;
@@ -63,35 +81,20 @@ static void hot_reload(ShaderProgram program, File *common_shader_code,
 }
 
 static void loop(Window *window, ShaderProgram program, bool hr,
-                 File *common_shader_code, File *fragment_shaders,
-                 Timer *timer) {
-  Context context;
-  int size;
+                 File *common_shader_code, File *fragment_shaders, Timer *timer,
+                 Context *context) {
 
   if (hr) {
     hot_reload(program, common_shader_code, fragment_shaders);
   }
 
-  context = window_get_context(window);
+  window_get_context(window, context);
 
-  context.fps = compute_fps(window, timer);
-  context.tempo = 120.0f; // TODO need tempo here
+  context->fps = compute_fps(window, timer);
 
-  // TODO temporary state
-  size = program.frag_count * program.sub_type_count * sizeof(unsigned int);
-  context.sub_state = malloc(size);
-  memset(context.sub_state, 0, size);
-  context.sub_state[program.sub_type_count * 0 + 0] = 1;
-  context.sub_state[program.sub_type_count * 1 + 0] = 6;
-  context.sub_state[program.sub_type_count * 2 + 1] = 1;
-  context.sub_state[program.sub_type_count * 3 + 1] = 3;
-  context.sub_state[program.sub_type_count * 5 + 1] = 6;
-
-  shaders_apply(program, context);
+  shaders_apply(program, *context);
 
   window_refresh(window);
-
-  free(context.sub_state);
 }
 
 File read_fragment_shader_file(char *frag_path, unsigned int i) {
@@ -157,7 +160,9 @@ void forge_run(Parameters params) {
   window = window_init(PACKAGE " " VERSION, params.screen, error_callback,
                        key_callback);
 
-  context = window_get_context(window);
+  window_get_context(window, &context);
+
+  init_context(program, &context, params);
 
   program = shaders_init(fragment_shaders, shader_config, context);
 
@@ -172,7 +177,7 @@ void forge_run(Parameters params) {
 
   while (!window_should_close(window)) {
     loop(window, program, params.hot_reload, &common_shader_code,
-         fragment_shaders, &timer);
+         fragment_shaders, &timer, &context);
   }
 
   free_files(&common_shader_code, fragment_shaders, frag_count);
@@ -180,4 +185,6 @@ void forge_run(Parameters params) {
   config_file_free(shader_config);
 
   window_close(window, true);
+
+  free(context.sub_state);
 }

src/shaders.c

@@ -158,6 +158,9 @@ static void init_single_program(ShaderProgram *program, unsigned int i,
   program->ires_locations[i] = glGetUniformLocation(
       program->programs[i],
       config_file_get_str(shader_config, "UNIFORM_RESOLUTION", "iResolution"));
+  program->idemo_locations[i] = glGetUniformLocation(
+      program->programs[i],
+      config_file_get_str(shader_config, "UNIFORM_DEMO", "iDemo"));
 
   for (j = 0; j < program->sub_type_count; j++) {
     sprintf(name, "SUB_%d_PREFIX", j + 1);
@@ -200,6 +203,7 @@ static void init_programs(ShaderProgram *program, ConfigFile shader_config) {
   program->itempo_locations = malloc(program->frag_count * sizeof(GLuint));
   program->ifps_locations = malloc(program->frag_count * sizeof(GLuint));
   program->ires_locations = malloc(program->frag_count * sizeof(GLuint));
+  program->idemo_locations = malloc(program->frag_count * sizeof(GLuint));
   program->vpos_locations = malloc(program->frag_count * sizeof(GLuint));
   program->textures_locations =
       malloc(program->frag_count * program->tex_count * sizeof(GLuint));
@@ -307,6 +311,7 @@ static void use_program(ShaderProgram program, int i, bool output,
   glUniform1f(program.itime_locations[i], (const GLfloat)context.time);
   glUniform1f(program.itempo_locations[i], (const GLfloat)context.tempo);
   glUniform1i(program.ifps_locations[i], (const GLint)context.fps);
+  glUniform1i(program.idemo_locations[i], (const GLint)(context.demo ? 1 : 0));
   glUniform2fv(program.ires_locations[i], 1, (const GLfloat *)&resolution);
 
   // set subroutines for fragment
@@ -340,5 +345,5 @@ void shaders_apply(ShaderProgram program, Context context) {
     }
   }
 
-  use_program(program, program.frag_output_index, true, context);
+  use_program(program, program.frag_monitor_index, true, context);
 }

src/types.h

@@ -14,6 +14,8 @@ typedef struct Parameters {
   char *frag_path;
   char *frag_config_path;
   bool hot_reload;
+  float base_tempo;
+  bool demo;
 } Parameters;
 
 typedef struct Vertex {
@@ -54,6 +56,7 @@ typedef struct ShaderProgram {
   GLuint *itempo_locations;
   GLuint *ifps_locations;
   GLuint *ires_locations;
+  GLuint *idemo_locations;
 
   GLuint *vpos_locations;
 
@@ -73,6 +76,7 @@ typedef struct Context {
   unsigned int fps;
   float tempo;
   unsigned int *sub_state;
+  bool demo;
 } Context;
 
 typedef struct Timer {

src/window.c

@@ -121,14 +121,10 @@ void window_refresh(Window *window) {
   glfwPollEvents();
 }
 
-Context window_get_context(Window *window) {
-  Context context;
+void window_get_context(Window *window, Context *context) {
+  glfwGetFramebufferSize(window, &context->width, &context->height);
 
-  glfwGetFramebufferSize(window, &context.width, &context.height);
-
-  context.time = glfwGetTime();
-
-  return context;
+  context->time = glfwGetTime();
 }
 
 void window_close(Window *window, bool hard) {

src/window.h

@@ -11,7 +11,7 @@ void window_update_title(Window *window, char *title);
 
 void window_refresh(Window *window);
 
-Context window_get_context(Window *window);
+void window_get_context(Window *window, Context *context);
 
 void window_close(Window *window, bool hard);