svga: Add svga driver

1 files changed, 139 insertions, 0 deletions

diff --git a/src/gallium/drivers/svga/svga_tgsi.h b/src/gallium/drivers/svga/svga_tgsi.h
new file mode 100644
index 00000000000..896c90a89ae
--- /dev/null
+++ b/src/gallium/drivers/svga/svga_tgsi.h
@@ -0,0 +1,139 @@
+/**********************************************************
+ * Copyright 2008-2009 VMware, Inc.  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, sublicense, 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 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
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * 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 SVGA_TGSI_H
+#define SVGA_TGSI_H
+
+#include "pipe/p_state.h"
+
+#include "svga_hw_reg.h"
+
+struct svga_fragment_shader;
+struct svga_vertex_shader;
+struct svga_shader;
+struct tgsi_shader_info;
+struct tgsi_token;
+
+
+struct svga_vs_compile_key
+{
+   ubyte need_prescale:1;
+   ubyte allow_psiz:1;
+   unsigned zero_stride_vertex_elements;
+   ubyte num_zero_stride_vertex_elements:6;
+};
+
+struct svga_fs_compile_key
+{
+   boolean light_twoside:1;
+   boolean front_cw:1;
+   ubyte num_textures;
+   ubyte num_unnormalized_coords;
+   struct {
+      ubyte compare_mode       : 1;
+      ubyte compare_func       : 3;
+      ubyte unnormalized       : 1;
+
+      ubyte width_height_idx   : 7;
+
+      ubyte texture_target;
+   } tex[PIPE_MAX_SAMPLERS];
+};
+
+union svga_compile_key {
+   struct svga_vs_compile_key vkey;
+   struct svga_fs_compile_key fkey;
+};
+
+struct svga_shader_result
+{
+   const struct svga_shader *shader;
+
+   /* Parameters used to generate this compilation result:
+    */
+   union svga_compile_key key;
+
+   /* Compiled shader tokens:
+    */
+   const unsigned *tokens;
+   unsigned nr_tokens;
+
+   /* SVGA Shader ID:
+    */
+   unsigned id;
+   
+   /* Next compilation result:
+    */
+   struct svga_shader_result *next;
+};
+
+
+/* TGSI doesn't provide use with VS input semantics (they're actually
+ * pretty meaningless), so we just generate some plausible ones here.
+ * This is called both from within the TGSI translator and when
+ * building vdecls to ensure they match up.
+ *
+ * The real use of this information is matching vertex elements to
+ * fragment shader inputs in the case where vertex shader is disabled.
+ */
+static INLINE void svga_generate_vdecl_semantics( unsigned idx,
+                                                  unsigned *usage,
+                                                  unsigned *usage_index )
+{
+   if (idx == 0) {
+      *usage = SVGA3D_DECLUSAGE_POSITION;
+      *usage_index = 0;
+   }
+   else {
+      *usage = SVGA3D_DECLUSAGE_TEXCOORD;
+      *usage_index = idx - 1;
+   }
+}
+
+
+
+static INLINE unsigned svga_vs_key_size( const struct svga_vs_compile_key *key )
+{
+   return sizeof *key;
+}
+
+static INLINE unsigned svga_fs_key_size( const struct svga_fs_compile_key *key )
+{
+   return (const char *)&key->tex[key->num_textures].texture_target -
+      (const char *)key;
+}
+
+struct svga_shader_result *
+svga_translate_fragment_program( const struct svga_fragment_shader *fs,
+                                 const struct svga_fs_compile_key *fkey );
+
+struct svga_shader_result *
+svga_translate_vertex_program( const struct svga_vertex_shader *fs,
+                               const struct svga_vs_compile_key *vkey );
+
+
+void svga_destroy_shader_result( struct svga_shader_result *result );
+
+#endif