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authorMarek Olšák <maraeo@gmail.com>2009-12-12 06:34:29 +0100
committerKeith Whitwell <keithw@vmware.com>2009-12-15 17:59:50 +0000
commitdff4c9ed559ae025d1d8fe7b9d1cea5a973c2225 (patch)
tree510b4c7df0c3f12caa26c80d9db84e90da2595f9 /src/gallium/auxiliary/util/u_simple_shaders.c
parent3a15c48ecedb985e2cecaaa9061ff579092069f1 (diff)
util: add new fragment shaders to simple_shaders
New shaders: * Fragment shader which writes depth sampled from a texture * Fragment shader which copies COLOR[0] to multiple render targets Additional improvements: * The fragment 'tex' shaders now take a sampler type (TGSI_TEXTURE_*) so that they can sample from any type of texture, not only from a 2D one.
Diffstat (limited to 'src/gallium/auxiliary/util/u_simple_shaders.c')
-rw-r--r--src/gallium/auxiliary/util/u_simple_shaders.c70
1 files changed, 63 insertions, 7 deletions
diff --git a/src/gallium/auxiliary/util/u_simple_shaders.c b/src/gallium/auxiliary/util/u_simple_shaders.c
index 1c8b157d91..8172ead020 100644
--- a/src/gallium/auxiliary/util/u_simple_shaders.c
+++ b/src/gallium/auxiliary/util/u_simple_shaders.c
@@ -2,6 +2,7 @@
*
* Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
+ * Copyright 2009 Marek Olšák <maraeo@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
@@ -30,6 +31,7 @@
* Simple vertex/fragment shader generators.
*
* @author Brian Paul
+ Marek Olšák
*/
@@ -87,6 +89,7 @@ util_make_vertex_passthrough_shader(struct pipe_context *pipe,
*/
void *
util_make_fragment_tex_shader_writemask(struct pipe_context *pipe,
+ unsigned tex_target,
unsigned writemask )
{
struct ureg_program *ureg;
@@ -116,20 +119,63 @@ util_make_fragment_tex_shader_writemask(struct pipe_context *pipe,
ureg_TEX( ureg,
ureg_writemask(out, writemask),
- TGSI_TEXTURE_2D, tex, sampler );
+ tex_target, tex, sampler );
ureg_END( ureg );
return ureg_create_shader_and_destroy( ureg, pipe );
}
void *
-util_make_fragment_tex_shader(struct pipe_context *pipe )
+util_make_fragment_tex_shader(struct pipe_context *pipe, unsigned tex_target )
{
return util_make_fragment_tex_shader_writemask( pipe,
+ tex_target,
TGSI_WRITEMASK_XYZW );
}
+/**
+ * Make a simple fragment texture shader which reads an X component from
+ * a texture and writes it as depth.
+ */
+void *
+util_make_fragment_tex_shader_writedepth(struct pipe_context *pipe,
+ unsigned tex_target)
+{
+ struct ureg_program *ureg;
+ struct ureg_src sampler;
+ struct ureg_src tex;
+ struct ureg_dst out, depth;
+ struct ureg_src imm;
+ ureg = ureg_create( TGSI_PROCESSOR_FRAGMENT );
+ if (ureg == NULL)
+ return NULL;
+
+ sampler = ureg_DECL_sampler( ureg, 0 );
+
+ tex = ureg_DECL_fs_input( ureg,
+ TGSI_SEMANTIC_GENERIC, 0,
+ TGSI_INTERPOLATE_PERSPECTIVE );
+
+ out = ureg_DECL_output( ureg,
+ TGSI_SEMANTIC_COLOR,
+ 0 );
+
+ depth = ureg_DECL_output( ureg,
+ TGSI_SEMANTIC_POSITION,
+ 0 );
+
+ imm = ureg_imm4f( ureg, 0, 0, 0, 1 );
+
+ ureg_MOV( ureg, out, imm );
+
+ ureg_TEX( ureg,
+ ureg_writemask(depth, TGSI_WRITEMASK_Z),
+ tex_target, tex, sampler );
+ ureg_END( ureg );
+
+ return ureg_create_shader_and_destroy( ureg, pipe );
+}
/**
* Make simple fragment color pass-through shader.
@@ -137,9 +183,18 @@ util_make_fragment_tex_shader(struct pipe_context *pipe )
void *
util_make_fragment_passthrough_shader(struct pipe_context *pipe)
{
+ return util_make_fragment_clonecolor_shader(pipe, 1);
+}
+
+void *
+util_make_fragment_clonecolor_shader(struct pipe_context *pipe, int num_cbufs)
+{
struct ureg_program *ureg;
struct ureg_src src;
- struct ureg_dst dst;
+ struct ureg_dst dst[8];
+ int i;
+
+ assert(num_cbufs <= 8);
ureg = ureg_create( TGSI_PROCESSOR_FRAGMENT );
if (ureg == NULL)
@@ -148,12 +203,13 @@ util_make_fragment_passthrough_shader(struct pipe_context *pipe)
src = ureg_DECL_fs_input( ureg, TGSI_SEMANTIC_COLOR, 0,
TGSI_INTERPOLATE_PERSPECTIVE );
- dst = ureg_DECL_output( ureg, TGSI_SEMANTIC_COLOR, 0 );
+ for (i = 0; i < num_cbufs; i++)
+ dst[i] = ureg_DECL_output( ureg, TGSI_SEMANTIC_COLOR, i );
+
+ for (i = 0; i < num_cbufs; i++)
+ ureg_MOV( ureg, dst[i], src );
- ureg_MOV( ureg, dst, src );
ureg_END( ureg );
return ureg_create_shader_and_destroy( ureg, pipe );
}
-
-