*
* 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
* Simple vertex/fragment shader generators.
*
* @author Brian Paul
+ Marek Olšák
*/
#include "pipe/p_context.h"
#include "pipe/p_shader_tokens.h"
+#include "pipe/p_state.h"
#include "util/u_simple_shaders.h"
+#include "util/u_debug.h"
#include "tgsi/tgsi_ureg.h"
/**
* Make simple vertex pass-through shader.
+ * \param num_attribs number of attributes to pass through
+ * \param semantic_names array of semantic names for each attribute
+ * \param semantic_indexes array of semantic indexes for each attribute
*/
void *
util_make_vertex_passthrough_shader(struct pipe_context *pipe,
uint num_attribs,
const uint *semantic_names,
const uint *semantic_indexes)
-
{
struct ureg_program *ureg;
uint i;
}
-
-
/**
* Make simple fragment texture shader:
* IMM {0,0,0,1} // (if writemask != 0xf)
* MOV OUT[0], IMM[0] // (if writemask != 0xf)
* TEX OUT[0].writemask, IN[0], SAMP[0], 2D;
* END;
+ *
+ * \param tex_target one of PIPE_TEXTURE_x
+ * \parma interp_mode either TGSI_INTERPOLATE_LINEAR or PERSPECTIVE
+ * \param writemask mask of TGSI_WRITEMASK_x
*/
void *
util_make_fragment_tex_shader_writemask(struct pipe_context *pipe,
+ unsigned tex_target,
+ unsigned interp_mode,
unsigned writemask )
{
struct ureg_program *ureg;
struct ureg_src tex;
struct ureg_dst out;
+ assert(interp_mode == TGSI_INTERPOLATE_LINEAR ||
+ interp_mode == TGSI_INTERPOLATE_PERSPECTIVE);
+
ureg = ureg_create( TGSI_PROCESSOR_FRAGMENT );
if (ureg == NULL)
return NULL;
tex = ureg_DECL_fs_input( ureg,
TGSI_SEMANTIC_GENERIC, 0,
- TGSI_INTERPOLATE_PERSPECTIVE );
+ interp_mode );
out = ureg_DECL_output( ureg,
TGSI_SEMANTIC_COLOR,
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 );
}
+
+/**
+ * Make a simple fragment shader that sets the output color to a color
+ * taken from a texture.
+ * \param tex_target one of PIPE_TEXTURE_x
+ */
void *
-util_make_fragment_tex_shader(struct pipe_context *pipe )
+util_make_fragment_tex_shader(struct pipe_context *pipe, unsigned tex_target,
+ unsigned interp_mode)
{
return util_make_fragment_tex_shader_writemask( pipe,
+ tex_target,
+ interp_mode,
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,
+ unsigned interp_mode)
+{
+ 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,
+ interp_mode );
+
+ 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.
*/
void *
util_make_fragment_passthrough_shader(struct pipe_context *pipe)
+{
+ return util_make_fragment_clonecolor_shader(pipe, 1);
+}
+
+
+/**
+ * Make a fragment shader that copies the input color to N output colors.
+ */
+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[PIPE_MAX_COLOR_BUFS];
+ int i;
+
+ assert(num_cbufs <= PIPE_MAX_COLOR_BUFS);
ureg = ureg_create( TGSI_PROCESSOR_FRAGMENT );
if (ureg == NULL)
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 );
}
-
-
projects / mesa.git / blobdiff