Reviewed-by: Eric Anholt <eric@anholt.net>
}
-#if 0
-GLuint
-clip_span(GLuint bufferWidth, GLuint bufferHeight,
- GLint x, GLint y, GLuint *count)
-{
- GLuint n = *count;
- GLuint skipPixels = 0;
-
- if (y < 0 || y >= bufferHeight || x + n <= 0 || x >= bufferWidth) {
- /* totally out of bounds */
- n = 0;
- }
- else {
- /* left clip */
- if (x < 0) {
- skipPixels = -x;
- x = 0;
- n -= skipPixels;
- }
- /* right clip */
- if (x + n > bufferWidth) {
- GLint dx = x + n - bufferWidth;
- n -= dx;
- }
- }
-
- *count = n;
-
- return skipPixels;
-}
-#endif
-
-
/**
* Return a span of stencil values from the stencil buffer.
* Used for glRead/CopyPixels