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-rw-r--r--src/mesa/drivers/dri/common/depthtmp.h269
1 files changed, 269 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/common/depthtmp.h b/src/mesa/drivers/dri/common/depthtmp.h
new file mode 100644
index 0000000..55199ab
--- /dev/null
+++ b/src/mesa/drivers/dri/common/depthtmp.h
@@ -0,0 +1,269 @@
+
+/*
+ * Notes:
+ * 1. These functions plug into the gl_renderbuffer structure.
+ * 2. The 'values' parameter always points to GLuint values, regardless of
+ * the actual Z buffer depth.
+ */
+
+
+#include "spantmp_common.h"
+
+#ifndef DBG
+#define DBG 0
+#endif
+
+#ifndef HAVE_HW_DEPTH_SPANS
+#define HAVE_HW_DEPTH_SPANS 0
+#endif
+
+#ifndef HAVE_HW_DEPTH_PIXELS
+#define HAVE_HW_DEPTH_PIXELS 0
+#endif
+
+static void TAG(WriteDepthSpan)( GLcontext *ctx,
+ struct gl_renderbuffer *rb,
+ GLuint n, GLint x, GLint y,
+ const void *values,
+ const GLubyte mask[] )
+{
+ HW_WRITE_LOCK()
+ {
+ const GLuint *depth = (const GLuint *) values;
+ GLint x1;
+ GLint n1;
+ LOCAL_DEPTH_VARS;
+
+ y = Y_FLIP( y );
+
+#if HAVE_HW_DEPTH_SPANS
+ (void) x1; (void) n1;
+
+ if ( DBG ) fprintf( stderr, "WriteDepthSpan 0..%d (x1 %d)\n",
+ (int)n, (int)x );
+
+ WRITE_DEPTH_SPAN();
+#else
+ HW_CLIPLOOP()
+ {
+ GLint i = 0;
+ CLIPSPAN( x, y, n, x1, n1, i );
+
+ if ( DBG ) fprintf( stderr, "WriteDepthSpan %d..%d (x1 %d) (mask %p)\n",
+ (int)i, (int)n1, (int)x1, mask );
+
+ if ( mask ) {
+ for ( ; n1>0 ; i++, x1++, n1-- ) {
+ if ( mask[i] ) WRITE_DEPTH( x1, y, depth[i] );
+ }
+ } else {
+ for ( ; n1>0 ; i++, x1++, n1-- ) {
+ WRITE_DEPTH( x1, y, depth[i] );
+ }
+ }
+ }
+ HW_ENDCLIPLOOP();
+#endif
+ }
+ HW_WRITE_UNLOCK();
+}
+
+
+#if HAVE_HW_DEPTH_SPANS
+/* implement MonoWriteDepthSpan() in terms of WriteDepthSpan() */
+static void
+TAG(WriteMonoDepthSpan)( GLcontext *ctx, struct gl_renderbuffer *rb,
+ GLuint n, GLint x, GLint y,
+ const void *value, const GLubyte mask[] )
+{
+ const GLuint depthVal = *((GLuint *) value);
+ GLuint depths[MAX_WIDTH];
+ GLuint i;
+ for (i = 0; i < n; i++)
+ depths[i] = depthVal;
+ TAG(WriteDepthSpan)(ctx, rb, n, x, y, depths, mask);
+}
+#else
+static void TAG(WriteMonoDepthSpan)( GLcontext *ctx,
+ struct gl_renderbuffer *rb,
+ GLuint n, GLint x, GLint y,
+ const void *value,
+ const GLubyte mask[] )
+{
+ HW_WRITE_LOCK()
+ {
+ const GLuint depth = *((GLuint *) value);
+ GLint x1;
+ GLint n1;
+ LOCAL_DEPTH_VARS;
+
+ y = Y_FLIP( y );
+
+ HW_CLIPLOOP()
+ {
+ GLint i = 0;
+ CLIPSPAN( x, y, n, x1, n1, i );
+
+ if ( DBG ) fprintf( stderr, "%s %d..%d (x1 %d) = %u\n",
+ __FUNCTION__, (int)i, (int)n1, (int)x1, (GLuint)depth );
+
+ if ( mask ) {
+ for ( ; n1>0 ; i++, x1++, n1-- ) {
+ if ( mask[i] ) WRITE_DEPTH( x1, y, depth );
+ }
+ } else {
+ for ( ; n1>0 ; x1++, n1-- ) {
+ WRITE_DEPTH( x1, y, depth );
+ }
+ }
+ }
+ HW_ENDCLIPLOOP();
+ }
+ HW_WRITE_UNLOCK();
+}
+#endif
+
+
+static void TAG(WriteDepthPixels)( GLcontext *ctx,
+ struct gl_renderbuffer *rb,
+ GLuint n,
+ const GLint x[],
+ const GLint y[],
+ const void *values,
+ const GLubyte mask[] )
+{
+ HW_WRITE_LOCK()
+ {
+ const GLuint *depth = (const GLuint *) values;
+ GLuint i;
+ LOCAL_DEPTH_VARS;
+
+ if ( DBG ) fprintf( stderr, "WriteDepthPixels\n" );
+
+#if HAVE_HW_DEPTH_PIXELS
+ (void) i;
+
+ WRITE_DEPTH_PIXELS();
+#else
+ HW_CLIPLOOP()
+ {
+ if ( mask ) {
+ for ( i = 0 ; i < n ; i++ ) {
+ if ( mask[i] ) {
+ const int fy = Y_FLIP( y[i] );
+ if ( CLIPPIXEL( x[i], fy ) )
+ WRITE_DEPTH( x[i], fy, depth[i] );
+ }
+ }
+ }
+ else {
+ for ( i = 0 ; i < n ; i++ ) {
+ const int fy = Y_FLIP( y[i] );
+ if ( CLIPPIXEL( x[i], fy ) )
+ WRITE_DEPTH( x[i], fy, depth[i] );
+ }
+ }
+ }
+ HW_ENDCLIPLOOP();
+#endif
+ }
+ HW_WRITE_UNLOCK();
+}
+
+
+/* Read depth spans and pixels
+ */
+static void TAG(ReadDepthSpan)( GLcontext *ctx,
+ struct gl_renderbuffer *rb,
+ GLuint n, GLint x, GLint y,
+ void *values )
+{
+ HW_READ_LOCK()
+ {
+ GLuint *depth = (GLuint *) values;
+ GLint x1, n1;
+ LOCAL_DEPTH_VARS;
+
+ y = Y_FLIP( y );
+
+ if ( DBG ) fprintf( stderr, "ReadDepthSpan\n" );
+
+#if HAVE_HW_DEPTH_SPANS
+ (void) x1; (void) n1;
+
+ READ_DEPTH_SPAN();
+#else
+ HW_CLIPLOOP()
+ {
+ GLint i = 0;
+ CLIPSPAN( x, y, n, x1, n1, i );
+ for ( ; n1>0 ; i++, n1-- ) {
+ READ_DEPTH( depth[i], x+i, y );
+ }
+ }
+ HW_ENDCLIPLOOP();
+#endif
+ }
+ HW_READ_UNLOCK();
+}
+
+static void TAG(ReadDepthPixels)( GLcontext *ctx,
+ struct gl_renderbuffer *rb,
+ GLuint n,
+ const GLint x[], const GLint y[],
+ void *values )
+{
+ HW_READ_LOCK()
+ {
+ GLuint *depth = (GLuint *) values;
+ GLuint i;
+ LOCAL_DEPTH_VARS;
+
+ if ( DBG ) fprintf( stderr, "ReadDepthPixels\n" );
+
+#if HAVE_HW_DEPTH_PIXELS
+ (void) i;
+
+ READ_DEPTH_PIXELS();
+#else
+ HW_CLIPLOOP()
+ {
+ for ( i = 0 ; i < n ;i++ ) {
+ int fy = Y_FLIP( y[i] );
+ if ( CLIPPIXEL( x[i], fy ) )
+ READ_DEPTH( depth[i], x[i], fy );
+ }
+ }
+ HW_ENDCLIPLOOP();
+#endif
+ }
+ HW_READ_UNLOCK();
+}
+
+
+/**
+ * Initialize the given renderbuffer's span routines to point to
+ * the depth/z functions we generated above.
+ */
+static void TAG(InitDepthPointers)(struct gl_renderbuffer *rb)
+{
+ rb->GetRow = TAG(ReadDepthSpan);
+ rb->GetValues = TAG(ReadDepthPixels);
+ rb->PutRow = TAG(WriteDepthSpan);
+ rb->PutRowRGB = NULL;
+ rb->PutMonoRow = TAG(WriteMonoDepthSpan);
+ rb->PutValues = TAG(WriteDepthPixels);
+ rb->PutMonoValues = NULL;
+}
+
+
+#if HAVE_HW_DEPTH_SPANS
+#undef WRITE_DEPTH_SPAN
+#undef WRITE_DEPTH_PIXELS
+#undef READ_DEPTH_SPAN
+#undef READ_DEPTH_PIXELS
+#else
+#undef WRITE_DEPTH
+#undef READ_DEPTH
+#endif
+#undef TAG