diff options
| -rw-r--r-- | src/mesa/drivers/dri/r128/r128_state.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/src/mesa/drivers/dri/r128/r128_state.c b/src/mesa/drivers/dri/r128/r128_state.c index 1b2c2a5284e..3a1d71d2154 100644 --- a/src/mesa/drivers/dri/r128/r128_state.c +++ b/src/mesa/drivers/dri/r128/r128_state.c @@ -599,8 +599,18 @@ static void r128UpdateClipping( GLcontext *ctx ) x2 += drawable->x; y2 += drawable->y; - rmesa->setup.sc_top_left_c = ((y1 << 16) | x1); - rmesa->setup.sc_bottom_right_c = ((y2 << 16) | x2); + /* Clamp values to screen to avoid wrapping problems */ + if ( x1 < 0 ) + x1 = 0; + else if ( x1 >= rmesa->driScreen->fbWidth ) + x1 = rmesa->driScreen->fbWidth - 1; + if ( y1 < 0 ) + y1 = 0; + else if ( y1 >= rmesa->driScreen->fbHeight ) + y1 = rmesa->driScreen->fbHeight - 1; + + rmesa->setup.sc_top_left_c = (((y1 & 0x3FFF) << 16) | (x1 & 0x3FFF)); + rmesa->setup.sc_bottom_right_c = (((y2 & 0x3FFF) << 16) | (x2 & 0x3FFF)); rmesa->dirty |= R128_UPLOAD_CONTEXT; } @@ -798,8 +808,8 @@ static void r128UpdateWindow( GLcontext *ctx ) struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0][0]; driRenderbuffer *drb = (driRenderbuffer *) rb; - rmesa->setup.window_xy_offset = ((y << R128_WINDOW_Y_SHIFT) | - (x << R128_WINDOW_X_SHIFT)); + rmesa->setup.window_xy_offset = (((y & 0xFFF) << R128_WINDOW_Y_SHIFT) | + ((x & 0xFFF) << R128_WINDOW_X_SHIFT)); rmesa->setup.dst_pitch_offset_c = (((drb->flippedPitch/8) << 21) | (drb->flippedOffset >> 5)); |