Merge remote branch 'origin/master' into pipe-video

[mesa.git] / src / gallium / auxiliary / util / u_simple_shaders.c

diff --git a/src/gallium/auxiliary/util/u_simple_shaders.c b/src/gallium/auxiliary/util/u_simple_shaders.c
index 8172ead0201e836548178033f762dabbfa2ef680..b0f2dd8aa29e8173c9620140c180fa2f6c5a4238 100644 (file)
--- a/src/gallium/auxiliary/util/u_simple_shaders.c
+++ b/src/gallium/auxiliary/util/u_simple_shaders.c
@@ -37,20 +37,24 @@
 
 #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;
@@ -78,18 +82,21 @@ util_make_vertex_passthrough_shader(struct pipe_context *pipe,
 }
 
 
-
-
 /**
  * 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;
@@ -97,6 +104,9 @@ util_make_fragment_tex_shader_writemask(struct pipe_context *pipe,
    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;
@@ -105,7 +115,7 @@ util_make_fragment_tex_shader_writemask(struct pipe_context *pipe,
 
    tex = ureg_DECL_fs_input( ureg, 
                              TGSI_SEMANTIC_GENERIC, 0, 
-                             TGSI_INTERPOLATE_PERSPECTIVE );
+                             interp_mode );
 
    out = ureg_DECL_output( ureg, 
                            TGSI_SEMANTIC_COLOR,
@@ -125,21 +135,31 @@ util_make_fragment_tex_shader_writemask(struct pipe_context *pipe,
    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, unsigned tex_target )
+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 tex_target,
+                                         unsigned interp_mode)
 {
    struct ureg_program *ureg;
    struct ureg_src sampler;
@@ -155,7 +175,7 @@ util_make_fragment_tex_shader_writedepth(struct pipe_context *pipe,
 
    tex = ureg_DECL_fs_input( ureg,
                              TGSI_SEMANTIC_GENERIC, 0,
-                             TGSI_INTERPOLATE_PERSPECTIVE );
+                             interp_mode );
 
    out = ureg_DECL_output( ureg,
                            TGSI_SEMANTIC_COLOR,
@@ -177,31 +197,39 @@ util_make_fragment_tex_shader_writedepth(struct pipe_context *pipe,
    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);
+   return util_make_fragment_cloneinput_shader(pipe, 1, TGSI_SEMANTIC_COLOR,
+                                               TGSI_INTERPOLATE_PERSPECTIVE);
 }
 
+
+/**
+ * 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)
+util_make_fragment_cloneinput_shader(struct pipe_context *pipe, int num_cbufs,
+                                     int input_semantic,
+                                     int input_interpolate)
 {
    struct ureg_program *ureg;
    struct ureg_src src;
-   struct ureg_dst dst[8];
+   struct ureg_dst dst[PIPE_MAX_COLOR_BUFS];
    int i;
 
-   assert(num_cbufs <= 8);
+   assert(num_cbufs <= PIPE_MAX_COLOR_BUFS);
 
    ureg = ureg_create( TGSI_PROCESSOR_FRAGMENT );
    if (ureg == NULL)
       return NULL;
 
-   src = ureg_DECL_fs_input( ureg, TGSI_SEMANTIC_COLOR, 0, 
-                             TGSI_INTERPOLATE_PERSPECTIVE );
+   src = ureg_DECL_fs_input( ureg, input_semantic, 0,
+                             input_interpolate );
 
    for (i = 0; i < num_cbufs; i++)
       dst[i] = ureg_DECL_output( ureg, TGSI_SEMANTIC_COLOR, i );