Usermode/AxWin3 - Added proper mid-character clipping to font rendering

diff --git a/Usermode/Applications/axwin3_src/WM/wm_render_text.c b/Usermode/Applications/axwin3_src/WM/wm_render_text.c
index 8258531..01b82ff 100644 (file)
--- a/Usermode/Applications/axwin3_src/WM/wm_render_text.c
+++ b/Usermode/Applications/axwin3_src/WM/wm_render_text.c
@@ -56,7 +56,7 @@ struct sFont
  int   WM_Render_DrawText(tWindow *Window, int X, int Y, int W, int H, tFont *Font, tColour Color, const char *Text, int MaxLen);
 void   WM_Render_GetTextDims(tFont *Font, const char *Text, int MaxLen, int *W, int *H);
 tGlyph *_GetGlyph(tFont *Font, uint32_t Codepoint);
-void   _RenderGlyph(tWindow *Window, short X, short Y, tGlyph *Glyph, uint32_t Color);
+void   _RenderGlyph(tWindow *Window, short X, short Y, short ClipW, short ClipH, tGlyph *Glyph, uint32_t Color);
 tGlyph *_SystemFont_CacheGlyph(tFont *Font, uint32_t Codepoint);
 
 // === GLOBALS ===
@@ -108,11 +108,11 @@ int WM_Render_DrawText(tWindow *Window, int X, int Y, int W, int H, tFont *Font,
                glyph = _GetGlyph(Font, ch);
                if( !glyph )    continue ;      // If not found, just don't render it
                
-               // End render if it will overflow the provided range
-               if( xOfs + glyph->TrueWidth > W )
+               // End render if it will not fit at all
+               if( xOfs >= W )
                        break;
                
-               _RenderGlyph(Window, X + xOfs, Y, glyph, Colour);
+               _RenderGlyph(Window, X + xOfs, Y, W-xOfs, H, glyph, Colour);
                xOfs += glyph->Width;
        }
        
@@ -235,7 +235,7 @@ tGlyph *_GetGlyph(tFont *Font, uint32_t Codepoint)
 
 /**
  */
-void _RenderGlyph(tWindow *Window, short X, short Y, tGlyph *Glyph, uint32_t Color)
+void _RenderGlyph(tWindow *Window, short X, short Y, short ClipW, short ClipH, tGlyph *Glyph, uint32_t Color)
 {
         int    xStart = 0, yStart = 0;
         int    x, y, dst_x;
@@ -258,9 +258,9 @@ void _RenderGlyph(tWindow *Window, short X, short Y, tGlyph *Glyph, uint32_t Col
        outBuf = (uint32_t*)Window->RenderBuffer + Y*Window->RealW + X;
        inBuf = Glyph->Bitmap + yStart*Glyph->TrueWidth;
 
-       for( y = yStart; y < Glyph->TrueHeight; y ++ )
+       for( y = yStart; y < Glyph->TrueHeight && ClipH--; y ++ )
        {
-               for( x = xStart, dst_x = 0; x < Glyph->TrueWidth; x ++, dst_x ++ )
+               for( x = xStart, dst_x = 0; x < Glyph->TrueWidth && dst_x < ClipW; x ++, dst_x ++ )
                {
                        outBuf[dst_x] = Video_AlphaBlend( outBuf[dst_x], Color, inBuf[x] );
                }