diff options
Diffstat (limited to 'mesalib/src/gallium/auxiliary/util/u_prim.h')
| -rw-r--r-- | mesalib/src/gallium/auxiliary/util/u_prim.h | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_prim.h b/mesalib/src/gallium/auxiliary/util/u_prim.h new file mode 100644 index 000000000..519820e1b --- /dev/null +++ b/mesalib/src/gallium/auxiliary/util/u_prim.h @@ -0,0 +1,234 @@ +/**************************************************************************
+ *
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+
+#ifndef U_BLIT_H
+#define U_BLIT_H
+
+
+#include "pipe/p_defines.h"
+#include "util/u_debug.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+static INLINE boolean u_validate_pipe_prim( unsigned pipe_prim, unsigned nr )
+{
+ boolean ok = TRUE;
+
+ switch (pipe_prim) {
+ case PIPE_PRIM_POINTS:
+ ok = (nr >= 1);
+ break;
+ case PIPE_PRIM_LINES:
+ ok = (nr >= 2);
+ break;
+ case PIPE_PRIM_LINE_STRIP:
+ case PIPE_PRIM_LINE_LOOP:
+ ok = (nr >= 2);
+ break;
+ case PIPE_PRIM_TRIANGLES:
+ ok = (nr >= 3);
+ break;
+ case PIPE_PRIM_TRIANGLE_STRIP:
+ case PIPE_PRIM_TRIANGLE_FAN:
+ case PIPE_PRIM_POLYGON:
+ ok = (nr >= 3);
+ break;
+ case PIPE_PRIM_QUADS:
+ ok = (nr >= 4);
+ break;
+ case PIPE_PRIM_QUAD_STRIP:
+ ok = (nr >= 4);
+ break;
+ default:
+ ok = 0;
+ break;
+ }
+
+ return ok;
+}
+
+
+static INLINE boolean u_trim_pipe_prim( unsigned pipe_prim, unsigned *nr )
+{
+ boolean ok = TRUE;
+
+ switch (pipe_prim) {
+ case PIPE_PRIM_POINTS:
+ ok = (*nr >= 1);
+ break;
+ case PIPE_PRIM_LINES:
+ ok = (*nr >= 2);
+ *nr -= (*nr % 2);
+ break;
+ case PIPE_PRIM_LINE_STRIP:
+ case PIPE_PRIM_LINE_LOOP:
+ ok = (*nr >= 2);
+ break;
+ case PIPE_PRIM_TRIANGLES:
+ ok = (*nr >= 3);
+ *nr -= (*nr % 3);
+ break;
+ case PIPE_PRIM_TRIANGLE_STRIP:
+ case PIPE_PRIM_TRIANGLE_FAN:
+ case PIPE_PRIM_POLYGON:
+ ok = (*nr >= 3);
+ break;
+ case PIPE_PRIM_QUADS:
+ ok = (*nr >= 4);
+ *nr -= (*nr % 4);
+ break;
+ case PIPE_PRIM_QUAD_STRIP:
+ ok = (*nr >= 4);
+ *nr -= (*nr % 2);
+ break;
+ case PIPE_PRIM_LINES_ADJACENCY:
+ ok = (*nr >= 4);
+ *nr -= (*nr % 4);
+ break;
+ case PIPE_PRIM_LINE_STRIP_ADJACENCY:
+ ok = (*nr >= 4);
+ break;
+ case PIPE_PRIM_TRIANGLES_ADJACENCY:
+ ok = (*nr >= 6);
+ *nr -= (*nr % 5);
+ break;
+ case PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY:
+ ok = (*nr >= 4);
+ break;
+ default:
+ ok = 0;
+ break;
+ }
+
+ if (!ok)
+ *nr = 0;
+
+ return ok;
+}
+
+
+static INLINE unsigned u_reduced_prim( unsigned pipe_prim )
+{
+ switch (pipe_prim) {
+ case PIPE_PRIM_POINTS:
+ return PIPE_PRIM_POINTS;
+
+ case PIPE_PRIM_LINES:
+ case PIPE_PRIM_LINE_STRIP:
+ case PIPE_PRIM_LINE_LOOP:
+ return PIPE_PRIM_LINES;
+
+ default:
+ return PIPE_PRIM_TRIANGLES;
+ }
+}
+
+static INLINE unsigned
+u_vertices_per_prim(int primitive)
+{
+ switch(primitive) {
+ case PIPE_PRIM_POINTS:
+ return 1;
+ case PIPE_PRIM_LINES:
+ case PIPE_PRIM_LINE_LOOP:
+ case PIPE_PRIM_LINE_STRIP:
+ return 2;
+ case PIPE_PRIM_TRIANGLES:
+ case PIPE_PRIM_TRIANGLE_STRIP:
+ case PIPE_PRIM_TRIANGLE_FAN:
+ return 3;
+ case PIPE_PRIM_LINES_ADJACENCY:
+ case PIPE_PRIM_LINE_STRIP_ADJACENCY:
+ return 4;
+ case PIPE_PRIM_TRIANGLES_ADJACENCY:
+ case PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY:
+ return 6;
+
+ /* following primitives should never be used
+ * with geometry shaders abd their size is
+ * undefined */
+ case PIPE_PRIM_POLYGON:
+ case PIPE_PRIM_QUADS:
+ case PIPE_PRIM_QUAD_STRIP:
+ default:
+ debug_printf("Unrecognized geometry shader primitive");
+ return 3;
+ }
+}
+
+/**
+ * Returns the number of decomposed primitives for the given
+ * vertex count.
+ * Geometry shader is invoked once for each triangle in
+ * triangle strip, triangle fans and triangles and once
+ * for each line in line strip, line loop, lines.
+ */
+static INLINE unsigned
+u_gs_prims_for_vertices(int primitive, int vertices)
+{
+ switch(primitive) {
+ case PIPE_PRIM_POINTS:
+ return vertices;
+ case PIPE_PRIM_LINES:
+ return vertices / 2;
+ case PIPE_PRIM_LINE_LOOP:
+ return vertices;
+ case PIPE_PRIM_LINE_STRIP:
+ return vertices - 1;
+ case PIPE_PRIM_TRIANGLES:
+ return vertices / 3;
+ case PIPE_PRIM_TRIANGLE_STRIP:
+ return vertices - 2;
+ case PIPE_PRIM_TRIANGLE_FAN:
+ return vertices - 2;
+ case PIPE_PRIM_LINES_ADJACENCY:
+ return vertices / 2;
+ case PIPE_PRIM_LINE_STRIP_ADJACENCY:
+ return vertices - 1;
+ case PIPE_PRIM_TRIANGLES_ADJACENCY:
+ return vertices / 3;
+ case PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY:
+ return vertices - 2;
+
+ /* following primitives should never be used
+ * with geometry shaders abd their size is
+ * undefined */
+ case PIPE_PRIM_POLYGON:
+ case PIPE_PRIM_QUADS:
+ case PIPE_PRIM_QUAD_STRIP:
+ default:
+ debug_printf("Unrecognized geometry shader primitive");
+ return 3;
+ }
+}
+
+const char *u_prim_name( unsigned pipe_prim );
+
+#endif
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