GUI: implement sample draw

src/engine/playback.cpp

@@ -1560,7 +1560,7 @@ void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsi
     return;
   }
 
-  logD("attempts: %d\n",attempts);
+  //logD("attempts: %d\n",attempts);
   if (attempts>=100) {
     logE("hang detected! stopping! at %d seconds %d micro\n",totalSeconds,totalTicks);
     freelance=false;

src/gui/gui.cpp

@@ -5038,6 +5038,34 @@ void FurnaceGUI::processDrags(int dragX, int dragY) {
       modified=true;
     }
   }
+  if (sampleDragActive) {
+    int x=samplePos+(int)(double(dragX-sampleDragStart.x)*sampleZoom);
+    int x1=samplePos+(int)(double(dragX-sampleDragStart.x+1)*sampleZoom);
+    if (x<0) x=0;
+    if (x>=(int)sampleDragLen) x=sampleDragLen-1;
+    if (x1<0) x1=0;
+    if (x1>=(int)sampleDragLen) x1=sampleDragLen-1;
+    double y=0.5-double(dragY-sampleDragStart.y)/sampleDragAreaSize.y;
+    if (sampleDragMode) { // draw
+      if (sampleDrag16) {
+        int val=y*65536;
+        if (val<-32768) val=-32768;
+        if (val>32767) val=32767;
+        for (int i=x; i<=x1; i++) ((short*)sampleDragTarget)[i]=val;
+      } else {
+        int val=y*256;
+        if (val<-128) val=-128;
+        if (val>127) val=127;
+        for (int i=x; i<=x1; i++) ((signed char*)sampleDragTarget)[i]=val;
+      }
+      updateSampleTex=true;
+    } else { // select
+      if (sampleSelStart<0) {
+        sampleSelStart=x;
+      }
+      sampleSelEnd=x;
+    }
+  }
 }
 
 #define sysAddOption(x) \
@@ -5287,7 +5315,7 @@ bool FurnaceGUI::loop() {
               addScroll(1);
             }
           }
-          if (macroDragActive || macroLoopDragActive || waveDragActive) {
+          if (macroDragActive || macroLoopDragActive || waveDragActive || sampleDragActive) {
             int distance=fabs(motionXrel);
             if (distance<1) distance=1;
             float start=motionX-motionXrel;
@@ -5304,7 +5332,7 @@ bool FurnaceGUI::loop() {
           break;
         }
         case SDL_MOUSEBUTTONUP:
-          if (macroDragActive || macroLoopDragActive || waveDragActive) modified=true;
+          if (macroDragActive || macroLoopDragActive || waveDragActive || (sampleDragActive && sampleDragMode)) modified=true;
           macroDragActive=false;
           macroDragBitMode=false;
           macroDragInitialValue=false;
@@ -5313,6 +5341,19 @@ bool FurnaceGUI::loop() {
           macroDragLastY=-1;
           macroLoopDragActive=false;
           waveDragActive=false;
+          if (sampleDragActive) {
+            logD("stopping sample drag\n");
+            if (sampleDragMode) {
+              e->renderSamplesP();
+            } else {
+              if (sampleSelStart>sampleSelEnd) {
+                sampleSelStart^=sampleSelEnd;
+                sampleSelEnd^=sampleSelStart;
+                sampleSelStart^=sampleSelEnd;
+              }
+            }
+          }
+          sampleDragActive=false;
           if (selecting) {
             cursor=selEnd;
             finishSelection();

src/gui/gui.h

@@ -747,6 +747,7 @@ class FurnaceGUI {
   void* sampleDragTarget;
   ImVec2 sampleDragStart;
   ImVec2 sampleDragAreaSize;
+  unsigned int sampleDragLen;
 
   // visualizer
   float keyHit[DIV_MAX_CHANS];

src/gui/sampleEdit.cpp

@@ -320,7 +320,11 @@ void FurnaceGUI::drawSampleEdit() {
               if (xCoarse>=sample->samples) break;
               int y1, y2;
               int totalAdvance=0;
-              y1=((unsigned short)sample->data16[xCoarse]^0x8000)*availY/65536;
+              if (sample->depth==8) {
+                y1=((unsigned char)sample->data8[xCoarse]^0x80)*availY/256;
+              } else {
+                y1=((unsigned short)sample->data16[xCoarse]^0x8000)*availY/65536;
+              }
               xFine+=xAdvanceFine;
               if (xFine>=16777216) {
                 xFine-=16777216;
@@ -329,14 +333,22 @@ void FurnaceGUI::drawSampleEdit() {
               totalAdvance+=xAdvanceCoarse;
               if (xCoarse>=sample->samples) break;
               do {
-                y2=((unsigned short)sample->data16[xCoarse]^0x8000)*availY/65536;
+                if (sample->depth==8) {
+                  y2=((unsigned char)sample->data8[xCoarse]^0x80)*availY/256;
+                } else {
+                  y2=((unsigned short)sample->data16[xCoarse]^0x8000)*availY/65536;
+                }
                 if (y1>y2) {
                   y2^=y1;
                   y1^=y2;
                   y2^=y1;
                 }
+                if (y1<0) y1=0;
+                if (y1>=availY) y1=availY-1;
+                if (y2<0) y2=0;
+                if (y2>=availY) y2=availY-1;
                 for (int j=y1; j<=y2; j++) {
-                  data[i+availX*j]=lineColor;
+                  data[i+availX*(availY-j-1)]=lineColor;
                 }
                 if (totalAdvance>0) xCoarse++;
               } while ((totalAdvance--)>0);
@@ -348,7 +360,17 @@ void FurnaceGUI::drawSampleEdit() {
 
         ImGui::ImageButton(sampleTex,avail,ImVec2(0,0),ImVec2(1,1),0);
         if (ImGui::IsItemClicked()) {
-          logD("drawing\n");
+          if (sample->samples>0 && (sample->depth==16 || sample->depth==8)) {
+            sampleDragStart=ImGui::GetItemRectMin();
+            sampleDragAreaSize=ImGui::GetItemRectSize();
+            sampleDrag16=(sample->depth==16);
+            sampleDragTarget=(sample->depth==16)?((void*)sample->data16):((void*)sample->data8);
+            sampleDragLen=sample->samples;
+            sampleDragActive=true;
+            sampleSelStart=-1;
+            sampleSelEnd=-1;
+            processDrags(ImGui::GetMousePos().x,ImGui::GetMousePos().y);
+          }
         }
         String statusBar=sampleDragMode?"Draw":"Select";