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Diffstat (limited to 'src/gallium/auxiliary/draw/draw_vertex.h')
-rw-r--r--src/gallium/auxiliary/draw/draw_vertex.h163
1 files changed, 163 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/draw/draw_vertex.h b/src/gallium/auxiliary/draw/draw_vertex.h
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+++ b/src/gallium/auxiliary/draw/draw_vertex.h
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+/**************************************************************************
+ *
+ * Copyright 2007 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.
+ *
+ **************************************************************************/
+
+/**
+ * Post-transform vertex format info. The vertex_info struct is used by
+ * the draw_vbuf code to emit hardware-specific vertex layouts into hw
+ * vertex buffers.
+ *
+ * Author:
+ * Brian Paul
+ */
+
+
+#ifndef DRAW_VERTEX_H
+#define DRAW_VERTEX_H
+
+
+#include "pipe/p_state.h"
+
+
+/**
+ * Vertex attribute emit modes
+ */
+enum attrib_emit {
+ EMIT_OMIT, /**< don't emit the attribute */
+ EMIT_1F,
+ EMIT_1F_PSIZE, /**< insert constant point size */
+ EMIT_2F,
+ EMIT_3F,
+ EMIT_4F,
+ EMIT_4UB /**< XXX may need variations for RGBA vs BGRA, etc */
+};
+
+
+/**
+ * Attribute interpolation mode
+ */
+enum interp_mode {
+ INTERP_NONE, /**< never interpolate vertex header info */
+ INTERP_POS, /**< special case for frag position */
+ INTERP_CONSTANT,
+ INTERP_LINEAR,
+ INTERP_PERSPECTIVE
+};
+
+
+/**
+ * Information about hardware/rasterization vertex layout.
+ */
+struct vertex_info
+{
+ uint num_attribs;
+ uint hwfmt[4]; /**< hardware format info for this format */
+ uint size; /**< total vertex size in dwords */
+
+ /* Keep this small and at the end of the struct to allow quick
+ * memcmp() comparisons.
+ */
+ struct {
+ unsigned interp_mode:4; /**< INTERP_x */
+ unsigned emit:4; /**< EMIT_x */
+ unsigned src_index:8; /**< map to post-xform attribs */
+ } attrib[PIPE_MAX_SHADER_INPUTS];
+};
+
+static INLINE int
+draw_vinfo_size( const struct vertex_info *a )
+{
+ return ((const char *)&a->attrib[a->num_attribs] -
+ (const char *)a);
+}
+
+static INLINE int
+draw_vinfo_compare( const struct vertex_info *a,
+ const struct vertex_info *b )
+{
+ unsigned sizea = draw_vinfo_size( a );
+ return memcmp( a, b, sizea );
+}
+
+static INLINE void
+draw_vinfo_copy( struct vertex_info *dst,
+ const struct vertex_info *src )
+{
+ unsigned size = draw_vinfo_size( src );
+ memcpy( dst, src, size );
+}
+
+
+
+/**
+ * Add another attribute to the given vertex_info object.
+ * \param src_index indicates which post-transformed vertex attrib slot
+ * corresponds to this attribute.
+ * \return slot in which the attribute was added
+ */
+static INLINE uint
+draw_emit_vertex_attr(struct vertex_info *vinfo,
+ enum attrib_emit emit,
+ enum interp_mode interp, /* only used by softpipe??? */
+ uint src_index)
+{
+ const uint n = vinfo->num_attribs;
+ assert(n < PIPE_MAX_SHADER_INPUTS);
+ vinfo->attrib[n].emit = emit;
+ vinfo->attrib[n].interp_mode = interp;
+ vinfo->attrib[n].src_index = src_index;
+ vinfo->num_attribs++;
+ return n;
+}
+
+
+extern void draw_compute_vertex_size(struct vertex_info *vinfo);
+
+void draw_dump_emitted_vertex(const struct vertex_info *vinfo,
+ const uint8_t *data);
+
+
+static INLINE unsigned draw_translate_vinfo_format(unsigned format )
+{
+ switch (format) {
+ case EMIT_1F:
+ case EMIT_1F_PSIZE:
+ return PIPE_FORMAT_R32_FLOAT;
+ case EMIT_2F:
+ return PIPE_FORMAT_R32G32_FLOAT;
+ case EMIT_3F:
+ return PIPE_FORMAT_R32G32B32_FLOAT;
+ case EMIT_4F:
+ return PIPE_FORMAT_R32G32B32A32_FLOAT;
+ case EMIT_4UB:
+ return PIPE_FORMAT_R8G8B8A8_UNORM;
+ default:
+ return PIPE_FORMAT_NONE;
+ }
+}
+
+
+#endif /* DRAW_VERTEX_H */