issue with table data access -- provoke crash

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "editor.fontSize": 12
+}

azur/src/gint/shaders/circle.c

@@ -14,6 +14,7 @@ void azrp_shader_circle_configure(void)
     azrp_set_uniforms(AZRP_SHADER_CIRCLE, (void *)azrp_width);
 }
 
+
 static int min(int x, int y)
 {
     return (x < y) ? x : y;
@@ -27,11 +28,13 @@ static int max(int x, int y)
 
 typedef struct 
 {
-    uint16_t x;
-    uint16_t y;
-}Pixel;
+    int16_t x;
+    int16_t y;
+} Pixel;
 
-Pixel TablePixels[14][396];       // 14 fragments each able to store as much pixels as width
+#define TABLE_WIDTH 396
+
+Pixel TablePixels[14*TABLE_WIDTH];       // 14 fragments each able to store as much pixels as width
 uint16_t NbPixels[14];                 // Nunmber of pixels in each fragment
 
 struct command {
@@ -39,20 +42,22 @@ struct command {
    uint16_t color;
    uint8_t currfrag;
 
-   uint16_t* pixnb;
-   Pixel **data;
+   uint16_t *pixnb;
+   Pixel *data;
 };
 
-void AddPixel( int xp, int yp )
+void AddPixel( int16_t xp, int16_t yp )
 {
     if (xp >= 0 && xp < azrp_width && yp >= 0 && yp < azrp_height)
     {
-        int currfrag = yp >> 4;
+        uint8_t currfrag = yp >> 4;
         
         uint16_t nbpixinfrag = NbPixels[ currfrag ];
 
-        TablePixels[ currfrag ][ nbpixinfrag ].x = xp;
-        TablePixels[ currfrag ][ nbpixinfrag ].y = yp & 15;
+        uint16_t index = currfrag * TABLE_WIDTH + nbpixinfrag;
+
+        TablePixels[ index ].x = xp;
+        TablePixels[ index ].y = yp & 15;
         
         NbPixels[ currfrag ]++;
     }
@@ -63,7 +68,7 @@ void azrp_circle(int xc, int yc, int rad, int color)
     prof_enter(azrp_perf_cmdgen);
 
 
-    for(int i=0;i<14;i++) NbPixels[i]=0;
+    for( int i = 0; i < 14; i++ ) NbPixels[i]=0;
 
 
     int xmin = xc - rad;
@@ -94,9 +99,9 @@ void azrp_circle(int xc, int yc, int rad, int color)
 
     int x = 0;
     int y = rad;
-    int d = rad - 1;
+    int m = 5 - 4*rad;
 
-    while (y >= x)
+    while (x <= y)
     {
         AddPixel( xc+x, yc+y );
         AddPixel( xc+y, yc+y );
@@ -107,22 +112,15 @@ void azrp_circle(int xc, int yc, int rad, int color)
         AddPixel( xc-x, yc-y );
         AddPixel( xc-y, yc-x );
 
-        if (d >= 2*x)
+        if (m >0)
         {
-            d = d - 2*x - 1;
-            x++;
-        }
-        else if (d < 2*(rad-y))
-        {
-            d = d + 2*y - 1;
             y--;
+            m -= 8*y;
         }
-        else
-        {
-            d = d + 2*(y - x - 1);
-            y--;
-            x++;
-        }
+
+        x--;
+        m += 8*x + 4;
+
     }
 
     cmd.pixnb = NbPixels;
@@ -137,15 +135,12 @@ void azrp_shader_circle( void *uniforms, void *comnd, void *fragment )
     struct command *cmd = (struct command *) comnd;
     uint16_t *frag = (uint16_t *) fragment;
     
-    uint16_t *nbPix = cmd->pixnb;
-    uint16_t taille = nbPix[ cmd->currfrag ];
+    uint16_t taille = (uint16_t) cmd->pixnb[ cmd->currfrag ];
+    Pixel *Data = (Pixel *) &cmd->data[ cmd->currfrag * TABLE_WIDTH ];
     
-    Pixel *pixData = cmd->data[ cmd->currfrag ];
-
-    for( int i=0; i<nbPix[cmd->currfrag]; i++ )
+    for( int i = 0; i < taille; i++ )
     {
-        
-        frag[ azrp_width * currFragPix[i].y + currFragPix[i].x ] = cmd->color;
+        frag[ azrp_width * Data[i].y + Data[i].x ] = cmd->color;
     }
 
     cmd->currfrag++;

azur/src/gint/shaders/line.c

@@ -14,14 +14,6 @@ void azrp_shader_line_configure(void)
     azrp_set_uniforms(AZRP_SHADER_LINE, (void *)azrp_width);
 }
 
-static int min(int x, int y)
-{
-    return (x < y) ? x : y;
-}
-static int max(int x, int y)
-{
-    return (x > y) ? x : y;
-}
 
 //---