Re-implement GLSL texture sampler variables.

GLSL sampler variables indicate which texture unit to use for TEX instructions.
Previously, this was baked into the fragment/vertex program and couldn't be
readily changed once set.
Now, SamplerUnits[] array indicates which texture unit is to be used for
each sampler variable.  These values are set with glUniform1i().
This is extra state that must be passed to the fragment/vertex program
executor at runtime.

12 files changed, 54 insertions, 1 deletions

diff --git a/src/mesa/pipe/failover/fo_context.h b/src/mesa/pipe/failover/fo_context.h
index 7a597013ab..759b53ccbe 100644
--- a/src/mesa/pipe/failover/fo_context.h
+++ b/src/mesa/pipe/failover/fo_context.h
@@ -84,6 +84,7 @@ struct failover_context {
    struct pipe_framebuffer_state framebuffer;
    struct pipe_poly_stipple poly_stipple;
    struct pipe_scissor_state scissor;
+   uint sampler_units[PIPE_MAX_SAMPLERS];
    struct pipe_mipmap_tree *texture[PIPE_MAX_SAMPLERS];
    struct pipe_viewport_state viewport;
    struct pipe_vertex_buffer vertex_buffer[PIPE_ATTRIB_MAX];
diff --git a/src/mesa/pipe/failover/fo_state.c b/src/mesa/pipe/failover/fo_state.c
index f63137f591..2cd1a50b20 100644
--- a/src/mesa/pipe/failover/fo_state.c
+++ b/src/mesa/pipe/failover/fo_state.c
@@ -294,6 +294,19 @@ failover_set_polygon_stipple( struct pipe_context *pipe,
    failover->hw->set_polygon_stipple( failover->hw, stipple );
 }
 
+static void
+failover_set_sampler_units( struct pipe_context *pipe,
+                            uint num_samplers, const uint *units )
+{
+   struct failover_context *failover = failover_context(pipe);
+   uint i;
+
+   for (i = 0; i < num_samplers; i++)
+      failover->sampler_units[i] = units[i];
+   failover->dirty |= FO_NEW_SAMPLER;
+   failover->hw->set_sampler_units(failover->hw, num_samplers, units);
+}
+
 static void *
 failover_create_rasterizer_state(struct pipe_context *pipe,
                                  const struct pipe_rasterizer_state *templ)
@@ -470,6 +483,7 @@ failover_init_state_functions( struct failover_context *failover )
    failover->pipe.set_clear_color_state = failover_set_clear_color_state;
    failover->pipe.set_framebuffer_state = failover_set_framebuffer_state;
    failover->pipe.set_polygon_stipple = failover_set_polygon_stipple;
+   failover->pipe.set_sampler_units = failover_set_sampler_units;
    failover->pipe.set_scissor_state = failover_set_scissor_state;
    failover->pipe.set_texture_state = failover_set_texture_state;
    failover->pipe.set_viewport_state = failover_set_viewport_state;
diff --git a/src/mesa/pipe/i915simple/i915_context.h b/src/mesa/pipe/i915simple/i915_context.h
index a3dd392e75..5a3ecedad2 100644
--- a/src/mesa/pipe/i915simple/i915_context.h
+++ b/src/mesa/pipe/i915simple/i915_context.h
@@ -173,6 +173,7 @@ struct i915_context
    struct pipe_framebuffer_state framebuffer;
    struct pipe_poly_stipple poly_stipple;
    struct pipe_scissor_state scissor;
+   uint sampler_units[PIPE_MAX_SAMPLERS];
    struct pipe_mipmap_tree *texture[PIPE_MAX_SAMPLERS];
    struct pipe_viewport_state viewport;
    struct pipe_vertex_buffer vertex_buffer[PIPE_ATTRIB_MAX];
diff --git a/src/mesa/pipe/i915simple/i915_state.c b/src/mesa/pipe/i915simple/i915_state.c
index 8da5662e3f..05f8a6e1fd 100644
--- a/src/mesa/pipe/i915simple/i915_state.c
+++ b/src/mesa/pipe/i915simple/i915_state.c
@@ -446,6 +446,15 @@ static void i915_set_polygon_stipple( struct pipe_context *pipe,
 {
 }
 
+static void i915_set_sampler_units(struct pipe_context *pipe,
+                                   uint numSamplers, const uint *units)
+{
+   struct i915_context *i915 = i915_context(pipe);
+   uint i;
+   for (i = 0; i < numSamplers; i++)
+      i915->sampler_units[i] = units[i];
+}
+
 static void * i915_create_fs_state(struct pipe_context *pipe,
                                    const struct pipe_shader_state *templ)
 {
@@ -765,6 +774,7 @@ i915_init_state_functions( struct i915_context *i915 )
    i915->pipe.set_feedback_buffer = i915_set_feedback_buffer;
 
    i915->pipe.set_polygon_stipple = i915_set_polygon_stipple;
+   i915->pipe.set_sampler_units = i915_set_sampler_units;
    i915->pipe.set_scissor_state = i915_set_scissor_state;
    i915->pipe.set_texture_state = i915_set_texture_state;
    i915->pipe.set_viewport_state = i915_set_viewport_state;
diff --git a/src/mesa/pipe/p_context.h b/src/mesa/pipe/p_context.h
index 3a041f158b..5497f50f73 100644
--- a/src/mesa/pipe/p_context.h
+++ b/src/mesa/pipe/p_context.h
@@ -148,6 +148,9 @@ struct pipe_context {
    void (*set_polygon_stipple)( struct pipe_context *,
 				const struct pipe_poly_stipple * );
 
+   void (*set_sampler_units)( struct pipe_context *,
+                              uint num_samplers, const uint *units );
+
    void (*set_scissor_state)( struct pipe_context *,
                               const struct pipe_scissor_state * );
 
diff --git a/src/mesa/pipe/softpipe/sp_context.c b/src/mesa/pipe/softpipe/sp_context.c
index 476d4ac01c..58ef744f30 100644
--- a/src/mesa/pipe/softpipe/sp_context.c
+++ b/src/mesa/pipe/softpipe/sp_context.c
@@ -318,6 +318,7 @@ struct pipe_context *softpipe_create( struct pipe_winsys *pipe_winsys,
    softpipe->pipe.set_feedback_state = softpipe_set_feedback_state;
    softpipe->pipe.set_framebuffer_state = softpipe_set_framebuffer_state;
    softpipe->pipe.set_polygon_stipple = softpipe_set_polygon_stipple;
+   softpipe->pipe.set_sampler_units = softpipe_set_sampler_units;
    softpipe->pipe.set_scissor_state = softpipe_set_scissor_state;
    softpipe->pipe.set_texture_state = softpipe_set_texture_state;
    softpipe->pipe.set_viewport_state = softpipe_set_viewport_state;
diff --git a/src/mesa/pipe/softpipe/sp_context.h b/src/mesa/pipe/softpipe/sp_context.h
index 3e77bd6b85..88a418d3c7 100644
--- a/src/mesa/pipe/softpipe/sp_context.h
+++ b/src/mesa/pipe/softpipe/sp_context.h
@@ -95,6 +95,7 @@ struct softpipe_context {
    struct pipe_viewport_state viewport;
    struct pipe_vertex_buffer vertex_buffer[PIPE_ATTRIB_MAX];
    struct pipe_vertex_element vertex_element[PIPE_ATTRIB_MAX];
+   uint sampler_units[PIPE_MAX_SAMPLERS];
    unsigned dirty;
 
    /*
diff --git a/src/mesa/pipe/softpipe/sp_quad_fs.c b/src/mesa/pipe/softpipe/sp_quad_fs.c
index 3371b109fc..9b9504cd15 100644
--- a/src/mesa/pipe/softpipe/sp_quad_fs.c
+++ b/src/mesa/pipe/softpipe/sp_quad_fs.c
@@ -85,6 +85,7 @@ shade_quad(
    /* Consts does not require 16 byte alignment. */
    machine->Consts = softpipe->mapped_constants[PIPE_SHADER_FRAGMENT];
 
+   machine->SamplerUnits = softpipe->sampler_units;
    machine->InterpCoefs = quad->coef;
 
    machine->Inputs[0].xyzw[0].f[0] = fx;
diff --git a/src/mesa/pipe/softpipe/sp_state.h b/src/mesa/pipe/softpipe/sp_state.h
index c194f0ea0d..61532bcdeb 100644
--- a/src/mesa/pipe/softpipe/sp_state.h
+++ b/src/mesa/pipe/softpipe/sp_state.h
@@ -99,6 +99,9 @@ void softpipe_delete_vs_state(struct pipe_context *, void *);
 void softpipe_set_polygon_stipple( struct pipe_context *,
 				  const struct pipe_poly_stipple * );
 
+void softpipe_set_sampler_units( struct pipe_context *,
+                                 uint numSamplers, const uint *units );
+
 void softpipe_set_scissor_state( struct pipe_context *,
                                  const struct pipe_scissor_state * );
 
diff --git a/src/mesa/pipe/softpipe/sp_state_sampler.c b/src/mesa/pipe/softpipe/sp_state_sampler.c
index c00e815f2d..e70eabd578 100644
--- a/src/mesa/pipe/softpipe/sp_state_sampler.c
+++ b/src/mesa/pipe/softpipe/sp_state_sampler.c
@@ -78,3 +78,17 @@ softpipe_set_texture_state(struct pipe_context *pipe,
 
    softpipe->dirty |= SP_NEW_TEXTURE;
 }
+
+
+void
+softpipe_set_sampler_units(struct pipe_context *pipe,
+                           uint num_samplers, const uint *units )
+{
+   struct softpipe_context *softpipe = softpipe_context(pipe);
+   uint i;
+   for (i = 0; i < num_samplers; i++)
+      softpipe->sampler_units[i] = units[i];
+   softpipe->dirty |= SP_NEW_SAMPLER;
+}
+
+
diff --git a/src/mesa/pipe/tgsi/exec/tgsi_exec.c b/src/mesa/pipe/tgsi/exec/tgsi_exec.c
index 0125f40dd2..66a81b4bd8 100644
--- a/src/mesa/pipe/tgsi/exec/tgsi_exec.c
+++ b/src/mesa/pipe/tgsi/exec/tgsi_exec.c
@@ -1219,11 +1219,14 @@ exec_tex(struct tgsi_exec_machine *mach,
          const struct tgsi_full_instruction *inst,
          boolean biasLod)
 {
-   const uint unit = inst->FullSrcRegisters[1].SrcRegister.Index;
+   const uint sampler = inst->FullSrcRegisters[1].SrcRegister.Index;
+   const uint unit = mach->SamplerUnits[sampler];
    union tgsi_exec_channel r[8];
    uint chan_index;
    float lodBias;
 
+   //   printf("Sampler %u unit %u\n", sampler, unit);
+
    switch (inst->InstructionExtTexture.Texture) {
    case TGSI_TEXTURE_1D:
 
diff --git a/src/mesa/pipe/tgsi/exec/tgsi_exec.h b/src/mesa/pipe/tgsi/exec/tgsi_exec.h
index 1805e72487..38f9218520 100644
--- a/src/mesa/pipe/tgsi/exec/tgsi_exec.h
+++ b/src/mesa/pipe/tgsi/exec/tgsi_exec.h
@@ -118,6 +118,7 @@ struct tgsi_exec_machine
    struct tgsi_exec_vector       *Temps;
    struct tgsi_exec_vector       *Addrs;
 
+   uint                          *SamplerUnits;
    struct tgsi_sampler           *Samplers;
 
    float                         Imms[TGSI_EXEC_NUM_IMMEDIATES][4];