From 076378328439d8e0fa23ccfff11ef460c24fd189 Mon Sep 17 00:00:00 2001
From: John Alanbrook <john@pockle.world>
Date: Tue, 12 Sep 2023 12:56:40 +0000
Subject: [PATCH] Gif making controllable from script

---
 source/engine/ffi.c     |  2 +-
 source/engine/render.c  | 81 +++++++++++++++++++----------------------
 source/scripts/debug.js |  6 +--
 3 files changed, 41 insertions(+), 48 deletions(-)

diff --git a/source/engine/ffi.c b/source/engine/ffi.c
index 1b0393e..3f03ef1 100644
--- a/source/engine/ffi.c
+++ b/source/engine/ffi.c
@@ -1121,7 +1121,7 @@ JSValue duk_cmd(JSContext *js, JSValueConst this, int argc, JSValueConst *argv)
       break;
 
     case 131:
-      gif_rec_start(480, 320, 4, 8);
+      gif_rec_start(js2int(argv[1]), js2int(argv[2]), js2int(argv[3]), js2int(argv[4]));
       break;
     case 132:
       str = JS_ToCString(js, argv[1]);
diff --git a/source/engine/render.c b/source/engine/render.c
index a377ea7..565aa13 100644
--- a/source/engine/render.c
+++ b/source/engine/render.c
@@ -37,21 +37,30 @@ static struct {
 } sg_gif;
 
 
-static int gif_w = 359, gif_h = 320, cpf = 4, gif_depth = 4;
-static int gif_rec = 0;
-static double gif_timer = 0, gif_spf;
-static char gif_buf[480*320*4];
-static char frame_buf[1920*1080*4];
+static struct {
+  int w;
+  int h;
+  int cpf;
+  int depth;
+  double timer;
+  double spf;
+  int rec;
+  char *buffer;
+} gif;
+
 MsfGifState gif_state = {};
 void gif_rec_start(int w, int h, int cpf, int bitdepth)
 {
-  gif_w = w;
-  gif_h = h;
-  gif_depth = bitdepth;
-  msf_gif_begin(&gif_state, gif_w, gif_h);
-  gif_spf = cpf/100.0;
-  gif_rec = 1;
-  gif_timer = appTime;
+  gif.w = w;
+  gif.h = h;
+  gif.depth = bitdepth;
+  msf_gif_begin(&gif_state, gif.w, gif.h);
+  gif.cpf = cpf;
+  gif.spf = cpf/100.0;
+  gif.rec = 1;
+  gif.timer = appTime;
+  if (gif.buffer) free(gif.buffer);
+  gif.buffer = malloc(gif.w*gif.h*4);
 
   sg_destroy_image(sg_gif.img);
   sg_destroy_image(sg_gif.depth);
@@ -59,14 +68,14 @@ void gif_rec_start(int w, int h, int cpf, int bitdepth)
 
   sg_gif.img = sg_make_image(&(sg_image_desc){
     .render_target = true,
-    .width = gif_w,
-    .height = gif_h,
+    .width = gif.w,
+    .height = gif.h,
   });
 
   sg_gif.depth = sg_make_image(&(sg_image_desc){
     .render_target = true,
-    .width = gif_w,
-    .height = gif_h,
+    .width = gif.w,
+    .height = gif.h,
     .pixel_format = SG_PIXELFORMAT_DEPTH_STENCIL
   });
   
@@ -78,32 +87,14 @@ void gif_rec_start(int w, int h, int cpf, int bitdepth)
 
 void gif_rec_end(char *path)
 {
-  MsfGifResult gif = msf_gif_end(&gif_state);
-  if (gif.data) {
+  MsfGifResult gif_res = msf_gif_end(&gif_state);
+  if (gif_res.data) {
     FILE *f = fopen(path, "wb");
-    fwrite(gif.data, gif.dataSize, 1, f);
+    fwrite(gif_res.data, gif_res.dataSize, 1, f);
     fclose(f);
   }
-  msf_gif_free(gif);
-  gif_rec = 0;
-}
-
-static void *read_texture_data(sg_image id, void *pixels)
-{
-#ifdef _SOKOL_ANY_GL
-  sg_image_desc desc = sg_query_image_desc(id);
-  int w = desc.width, h = desc.height;
-  _sg_image_t *img = _sg_lookup_image(&_sg.pools, id.id);
-  const GLenum gl_img_format = _sg_gl_teximage_format(img->cmn.pixel_format);
-  const GLenum gl_img_type = _sg_gl_teximage_type(img->cmn.pixel_format);
-  GLenum gl_img_target = img->gl.target;
-  GLuint gl_img_level = 0;
-  glGetTexImage(gl_img_target, 0, gl_img_format, gl_img_type, pixels);
-  return pixels;
-#else
-  YughWarn("NO GL");
-  return NULL;
-#endif
+  msf_gif_free(gif_res);
+  gif.rec = 0;
 }
 
 #include "sokol/sokol_app.h"
@@ -471,17 +462,16 @@ void openglRender(struct window *window) {
   sg_end_pass();
 
 
-  if (gif_rec && (appTime - gif_timer) > gif_spf) {
+  if (gif.rec && (appTime - gif.timer) > gif.spf) {
     sg_begin_pass(sg_gif.pass, &pass_action);
     sg_apply_pipeline(sg_gif.pipe);
     sg_apply_bindings(&crt_post.bind);
     sg_draw(0,6,1);
     sg_end_pass();
 
-    gif_timer = appTime;
-    //read_texture_data(sg_gif.img, gif_buf);
-    sg_query_image_pixels(sg_gif.img, gif_buf, gif_w*gif_h*4);
-    msf_gif_frame(&gif_state, gif_buf, cpf, gif_depth, gif_w * -4);
+    gif.timer = appTime;
+    sg_query_image_pixels(sg_gif.img, gif.buffer, gif.w*gif.h*4);
+    msf_gif_frame(&gif_state, gif.buffer, gif.cpf, gif.depth, gif.w * -4);
   }
 
   sg_begin_default_pass(&pass_action, window->width, window->height);
@@ -489,8 +479,11 @@ void openglRender(struct window *window) {
   sg_apply_bindings(&crt_post.bind);
   sg_draw(0,6,1);
 
+
+
   sg_end_pass();  
 
+
   sg_commit();
 
   debug_newframe();
diff --git a/source/scripts/debug.js b/source/scripts/debug.js
index 98366c2..a8fbeea 100644
--- a/source/scripts/debug.js
+++ b/source/scripts/debug.js
@@ -246,9 +246,9 @@ DebugControls.inputs.f4 = function() {
 DebugControls.inputs.f4.doc = "Toggle drawing gizmos and names of objects.";
 
 Debug.Options.gif = {
-  w: 480,
-  h: 320,
-  cpf: 4,
+  w: 640,
+  h: 480,
+  cpf: 2,
   depth: 8,
   file: "out.gif",
   rec: false,