From e17df27f66da17bfb461caefe6d7dee44d5c9a5e Mon Sep 17 00:00:00 2001
From: tildearrow <me@tildearrow.org>
Date: Tue, 20 Feb 2024 15:40:48 -0500
Subject: [PATCH] GUI: new osc renderer, part 26

sorry another window
---
 src/gui/gui.cpp             | 27 +++++++++++++++++++++++++++
 src/gui/gui.h               |  3 +++
 src/gui/osc.cpp             |  2 +-
 src/gui/render/abstract.cpp |  8 ++++++++
 src/gui/render/renderGL.cpp | 34 ++++++++++++++++++++++++++++++----
 src/gui/render/renderGL.h   |  2 ++
 6 files changed, 71 insertions(+), 5 deletions(-)

diff --git a/src/gui/gui.cpp b/src/gui/gui.cpp
index 31df9002f..b4ed3b41d 100644
--- a/src/gui/gui.cpp
+++ b/src/gui/gui.cpp
@@ -4674,6 +4674,30 @@ bool FurnaceGUI::loop() {
       MEASURE(effectList,drawEffectList());
     }
 
+    // NEW CODE - REMOVE WHEN DONE
+    if (ImGui::Begin("Shader Editor 2024",NULL)) {
+      ImGui::PushFont(patFont);
+      ImGui::InputTextMultiline("##SHFragment",&newOscFragment,ImVec2(ImGui::GetContentRegionAvail().x,ImGui::GetContentRegionAvail().y-ImGui::GetFrameHeightWithSpacing()),ImGuiInputTextFlags_UndoRedo);
+      ImGui::PopFont();
+      if (ImGui::Button("Save")) {
+        FILE* f=ps_fopen("/storage/emulated/0/osc.fsh","w");
+        if (f==NULL) {
+          showError("Something happened");
+        } else {
+          fwrite(newOscFragment.c_str(),1,newOscFragment.size(),f);
+          fclose(f);
+          showError("Saved!");
+        }
+      }
+      ImGui::SameLine();
+      if (ImGui::Button("Apply")) {
+        if (!rend->regenOscShader(newOscFragment.c_str())) {
+          showError("Of course you screwed it up, again!");
+        }
+      }
+    }
+    ImGui::End();
+
     // release selection if mouse released
     if (ImGui::IsMouseReleased(ImGuiMouseButton_Left) && selecting) {
       if (!selectingFull) cursor=selEnd;
@@ -6950,6 +6974,9 @@ bool FurnaceGUI::init() {
   ImGui::CreateContext();
   rend->initGUI(sdlWin);
 
+  // NEW CODE - REMOVE WHEN DONE
+  newOscFragment=rend->getStupidFragment();
+
   applyUISettings();
 
   logD("building font...");
diff --git a/src/gui/gui.h b/src/gui/gui.h
index 84c953403..c15167410 100644
--- a/src/gui/gui.h
+++ b/src/gui/gui.h
@@ -1435,6 +1435,8 @@ class FurnaceGUIRender {
     virtual void drawOsc(float* data, size_t len, ImVec2 pos0, ImVec2 pos1, ImVec4 color, ImVec2 canvasSize, float lineWidth);
     virtual void present();
     virtual bool supportsDrawOsc();
+    virtual const char* getStupidFragment();
+    virtual bool regenOscShader(const char* fragment);
     virtual bool getOutputSize(int& w, int& h);
     virtual int getWindowFlags();
     virtual void preInit();
@@ -1478,6 +1480,7 @@ class FurnaceGUI {
   int sampleTexW, sampleTexH;
   bool updateSampleTex;
 
+  String newOscFragment;
   String workingDir, fileName, clipboard, warnString, errorString, lastError, curFileName, nextFile, sysSearchQuery, newSongQuery, paletteQuery;
   String workingDirSong, workingDirIns, workingDirWave, workingDirSample, workingDirAudioExport;
   String workingDirVGMExport, workingDirZSMExport, workingDirROMExport, workingDirFont, workingDirColors, workingDirKeybinds;
diff --git a/src/gui/osc.cpp b/src/gui/osc.cpp
index 990363e0f..a70d244a7 100644
--- a/src/gui/osc.cpp
+++ b/src/gui/osc.cpp
@@ -307,7 +307,7 @@ void FurnaceGUI::drawOsc() {
           } else {
             for (int i=0; i<oscWidth-24; i++) {
               float x=(float)i/(float)(oscWidth-24);
-              float y=oscValuesAverage[i+12];
+              float y=oscValuesAverage[i+12]*0.5f;
               if (!settings.oscEscapesBoundary) {
                 if (y<-0.5f) y=-0.5f;
                 if (y>0.5f) y=0.5f;
diff --git a/src/gui/render/abstract.cpp b/src/gui/render/abstract.cpp
index 2b5e9413d..4d304e2e0 100644
--- a/src/gui/render/abstract.cpp
+++ b/src/gui/render/abstract.cpp
@@ -110,5 +110,13 @@ bool FurnaceGUIRender::isDead() {
   return false;
 }
 
+const char* FurnaceGUIRender::getStupidFragment() {
+  return "Only OpenGL";
+}
+
+bool FurnaceGUIRender::regenOscShader(const char* fragment) {
+  return false;
+}
+
 FurnaceGUIRender::~FurnaceGUIRender() {
 }
diff --git a/src/gui/render/renderGL.cpp b/src/gui/render/renderGL.cpp
index fa51f71e4..1349c919e 100644
--- a/src/gui/render/renderGL.cpp
+++ b/src/gui/render/renderGL.cpp
@@ -46,6 +46,8 @@ PFNGLATTACHSHADERPROC furAttachShader=NULL;
 PFNGLBINDATTRIBLOCATIONPROC furBindAttribLocation=NULL;
 PFNGLCREATEPROGRAMPROC furCreateProgram=NULL;
 PFNGLLINKPROGRAMPROC furLinkProgram=NULL;
+PFNGLDELETEPROGRAMPROC furDeleteProgram=NULL;
+PFNGLDELETESHADERPROC furDeleteShader=NULL;
 PFNGLGETPROGRAMIVPROC furGetProgramiv=NULL;
 PFNGLUSEPROGRAMPROC furUseProgram=NULL;
 PFNGLGETUNIFORMLOCATIONPROC furGetUniformLocation=NULL;
@@ -115,9 +117,9 @@ const char* sh_oscRender_srcF=
   "  if ((fur_fragCoord.y-uLineWidth)>valmax*uResolution.y) discard;\n"
   "  if ((fur_fragCoord.y+uLineWidth)<valmin*uResolution.y) discard;\n"
   "  float slope=abs(valmax-valmin)*uResolution.y;\n"
-  "  float slopeDiv=min(1.0,1.0/slope);\n"
-  "  float xRight=fur_fragCoord.x+uLineWidth;\n"
-  "  for (float x=max(0.0,fur_fragCoord.x-uLineWidth); x<=xRight; x+=slopeDiv) {\n"
+  "  float slopeDiv=min(1.0,2.0/ceil(slope));\n"
+  "  float xRight=ceil(fur_fragCoord.x+uLineWidth);\n"
+  "  for (float x=max(0.0,floor(fur_fragCoord.x-uLineWidth)); x<=xRight; x+=slopeDiv) {\n"
   "    float val0=texture2D(oscVal,vec2(floor(x)*oneStep,1.0)).x*uResolution.y;\n"
   "    float val1=texture2D(oscVal,vec2(floor(x+1.0)*oneStep,1.0)).x*uResolution.y;\n"
   "    float val=mix(val0,val1,fract(x));\n"
@@ -437,7 +439,7 @@ void FurnaceGUIRenderGL::drawOsc(float* data, size_t len, ImVec2 pos0, ImVec2 po
   //C(glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA));
   //C(glEnable(GL_BLEND));
 
-  float width=fabs(pos1.x-pos0.x);
+  //float width=fabs(pos1.x-pos0.x);
   float height=fabs(pos1.y-pos0.y)*0.5;
 
   pos0.x=(2.0f*pos0.x/canvasSize.x)-1.0f;
@@ -587,6 +589,8 @@ bool FurnaceGUIRenderGL::init(SDL_Window* win) {
   LOAD_PROC_OPTIONAL(furLinkProgram,PFNGLLINKPROGRAMPROC,"glLinkProgram");
   LOAD_PROC_OPTIONAL(furGetProgramiv,PFNGLGETPROGRAMIVPROC,"glGetProgramiv");
   LOAD_PROC_OPTIONAL(furUseProgram,PFNGLUSEPROGRAMPROC,"glUseProgram");
+  LOAD_PROC_OPTIONAL(furDeleteProgram,PFNGLDELETEPROGRAMPROC,"glDeleteProgram");
+  LOAD_PROC_OPTIONAL(furDeleteShader,PFNGLDELETESHADERPROC,"glDeleteShader");
   LOAD_PROC_OPTIONAL(furGetUniformLocation,PFNGLGETUNIFORMLOCATIONPROC,"glGetUniformLocation");
   LOAD_PROC_OPTIONAL(furUniform1f,PFNGLUNIFORM1FPROC,"glUniform1f");
   LOAD_PROC_OPTIONAL(furUniform2f,PFNGLUNIFORM2FPROC,"glUniform2f");
@@ -630,6 +634,28 @@ bool FurnaceGUIRenderGL::init(SDL_Window* win) {
   return true;
 }
 
+const char* FurnaceGUIRenderGL::getStupidFragment() {
+  return sh_oscRender_srcF;
+}
+
+bool FurnaceGUIRenderGL::regenOscShader(const char* fragment) {
+  if (sh_oscRender_have) {
+    furDeleteProgram(sh_oscRender_program);
+    furDeleteShader(sh_oscRender_vertex);
+    furDeleteShader(sh_oscRender_fragment);
+  }
+  
+  if ((sh_oscRender_have=createShader(sh_oscRender_srcV,fragment,sh_oscRender_vertex,sh_oscRender_fragment,sh_oscRender_program,sh_oscRender_attrib))==true) {
+    sh_oscRender_uColor=furGetUniformLocation(sh_oscRender_program,"uColor");
+    sh_oscRender_uLineWidth=furGetUniformLocation(sh_oscRender_program,"uLineWidth");
+    sh_oscRender_uResolution=furGetUniformLocation(sh_oscRender_program,"uResolution");
+    sh_oscRender_oscVal=furGetUniformLocation(sh_oscRender_program,"oscVal");
+    return true;
+  }
+
+  return false;
+}
+
 void FurnaceGUIRenderGL::initGUI(SDL_Window* win) {
   ImGui_ImplSDL2_InitForOpenGL(win,context);
   ImGui_ImplOpenGL3_Init();
diff --git a/src/gui/render/renderGL.h b/src/gui/render/renderGL.h
index bbb8c5a8f..eb9739ebf 100644
--- a/src/gui/render/renderGL.h
+++ b/src/gui/render/renderGL.h
@@ -57,6 +57,8 @@ class FurnaceGUIRenderGL: public FurnaceGUIRender {
     bool destroyTexture(FurnaceGUITexture* which);
     void setTextureBlendMode(FurnaceGUITexture* which, FurnaceGUIBlendMode mode);
     void setBlendMode(FurnaceGUIBlendMode mode);
+    const char* getStupidFragment();
+    bool regenOscShader(const char* fragment);
     void clear(ImVec4 color);
     bool newFrame();
     void createFontsTexture();