gallium/draw: initial code to properly support llvm in the draw module

[mesa.git] / src / glut / fbdev / cursor.c

diff --git a/src/glut/fbdev/cursor.c b/src/glut/fbdev/cursor.c
index 06ae2d6f54eb8998d9a2e4831afb69778db0e26e..4bb2b7fba0128756a4fc2257fdc641fb8d811d72 100644 (file)
--- a/src/glut/fbdev/cursor.c
+++ b/src/glut/fbdev/cursor.c
@@ -25,10 +25,13 @@
  */
 
 /* these routines are written to access graphics memory directly, not using mesa
-   to render the cursor, this is faster, and */
+   to render the cursor, this is faster, it would be good to use a hardware
+   cursor if it exists instead */
 
+#include <stdio.h>
 #include <stdlib.h>
 #include <inttypes.h>
+#include <string.h>
 
 #include <linux/fb.h>
 
@@ -63,6 +66,9 @@ void EraseCursor(void)
 
    unsigned char *src = MouseBuffer;
 
+   if(!MouseVisible || CurrentCursor < 0 || CurrentCursor >= NUM_CURSORS)
+      return;
+
    for(i = 0; i<CURSOR_HEIGHT; i++) {
       memcpy(BackBuffer + off, src, stride);
       src += stride;
@@ -107,7 +113,7 @@ void DrawCursor(void)
    unsigned char *c;
    const unsigned char *d;
 
-   if(CurrentCursor < 0 || CurrentCursor >= NUM_CURSORS)
+   if(!MouseVisible || CurrentCursor < 0 || CurrentCursor >= NUM_CURSORS)
       return;
 
    px = MouseX - CursorsXOffset[CurrentCursor];
@@ -163,7 +169,8 @@ void DrawCursor(void)
         cstride /= 2;
         for(i = yoff; i < ylen; i++) {
            for(j = xoff; j < xlen; j++) {
-              e[0] = ((((d[0] + (((int)(((e[0] >> 8) & 0xf8) 
+              if(d[3] < 220)
+                 e[0] = ((((d[0] + (((int)(((e[0] >> 8) & 0xf8) 
                         | ((c[0] >> 11) & 0x7)) * d[3]) >> 8)) & 0xf8) << 8)
                     | (((d[1] + (((int)(((e[0] >> 3) & 0xfc)
                         | ((e[0] >> 5) & 0x3)) * d[3]) >> 8)) & 0xfc) << 3)
@@ -181,9 +188,11 @@ void DrawCursor(void)
    case 4:
       for(i = yoff; i < ylen; i++) {
         for(j = xoff; j < xlen; j++) {
-           c[0] = d[0] + (((int)c[0] * d[3]) >> 8);
-           c[1] = d[1] + (((int)c[1] * d[3]) >> 8);
-           c[2] = d[2] + (((int)c[2] * d[3]) >> 8);
+           if(d[3] < 220) {
+              c[0] = d[0] + (((int)c[0] * d[3]) >> 8);
+              c[1] = d[1] + (((int)c[1] * d[3]) >> 8);
+              c[2] = d[2] + (((int)c[2] * d[3]) >> 8);
+           }
                
            c+=bypp;
            d+=4;
@@ -206,10 +215,12 @@ void SwapCursor(void)
    int miny = MIN(py, LastMouseY);
    int sizey = abs(py - LastMouseY);
 
-   DrawCursor();
-   /* now update the portion of the screen that has changed */
+   if(MouseVisible)
+      DrawCursor();
 
-   if(DisplayMode & GLUT_DOUBLE && (sizex || sizey)) {
+   /* now update the portion of the screen that has changed, this is also
+      used to hide the mouse if MouseVisible is 0 */
+   if(DisplayMode & GLUT_DOUBLE && ((sizex || sizey) || !MouseVisible)) {
       int off, stride, i;
       if(minx < 0)
         minx = 0;
@@ -224,7 +235,7 @@ void SwapCursor(void)
         + minx * VarInfo.bits_per_pixel / 8;
       stride = (sizex + CURSOR_WIDTH) * VarInfo.bits_per_pixel / 8;
 
-      for(i = 0; i< sizey + CURSOR_HEIGHT; i++) {
+      for(i = 0; i < sizey + CURSOR_HEIGHT; i++) {
         memcpy(FrameBuffer+off, BackBuffer+off, stride);
         off += FixedInfo.line_length;
       }
@@ -253,8 +264,9 @@ void glutSetCursor(int cursor)
 {
    if(cursor == GLUT_CURSOR_FULL_CROSSHAIR)
       cursor = GLUT_CURSOR_CROSSHAIR;
-   CurrentCursor = cursor;
-   MouseEnabled = 1;
+
    EraseCursor();
+   MouseVisible = 1;
+   CurrentCursor = cursor;
    SwapCursor();
 }