Mesa (master): mesa, glsl_to_tgsi: Add new gl_context::NativeIntegers flag.

Kenneth Graunke kwg at kemper.freedesktop.org
Fri Aug 19 23:33:20 PDT 2011


Module: Mesa
Branch: master
Commit: 01d81dedc795005ed235856ce762bb1981655716
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=01d81dedc795005ed235856ce762bb1981655716

Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Mon Aug 15 14:18:16 2011 -0700

mesa, glsl_to_tgsi: Add new gl_context::NativeIntegers flag.

Previously, native integer support was based on whether the driver
advertised GLSL 1.30 or not.  However, drivers that natively support
integers may wish to do so for older GLSL versions as well.  Adding this
new opt-in flag allows them to do so.

Currently disabled by default on all drivers, which was the existing
behavior (no drivers currently implement GLSL 1.30).

Fixes piglit tests on i965 with INTEL_GLSL_VERSION=130 set:
- spec/glsl-1.10/fs-uniform-int-110.shader_test
- spec/glsl-1.30/fs-uniform-int-130.shader_test
(it was doubly converting the data)

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick at intel.com>
Reviewed-by: Eric Anholt <eric at anholt.net>

---

 src/mesa/main/mtypes.h                     |    6 ++++
 src/mesa/main/uniforms.c                   |   18 ++++++------
 src/mesa/state_tracker/st_glsl_to_tgsi.cpp |   40 +++++++++++++++------------
 3 files changed, 37 insertions(+), 27 deletions(-)

diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 2d5f44c..8b36503 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -2717,6 +2717,12 @@ struct gl_constants
 
    GLuint GLSLVersion;  /**< GLSL version supported (ex: 120 = 1.20) */
 
+   /**
+    * Does the driver support real 32-bit integers?  (Otherwise, integers are
+    * simulated via floats.)
+    */
+   GLboolean NativeIntegers;
+
    /** Which texture units support GL_ATI_envmap_bumpmap as targets */
    GLbitfield SupportedBumpUnits;
 
diff --git a/src/mesa/main/uniforms.c b/src/mesa/main/uniforms.c
index 1329af4..cda840f 100644
--- a/src/mesa/main/uniforms.c
+++ b/src/mesa/main/uniforms.c
@@ -454,9 +454,9 @@ get_uniform(struct gl_context *ctx, GLuint program, GLint location,
             for (i = 0; i < rows; i++) {
                const int base = paramPos + offset + i;
                for (j = 0; j < cols; j++ ) {
-                  params[k++] = ctx->Const.GLSLVersion <= 120 ? 
-                     (GLint) prog->Parameters->ParameterValues[base][j].f : 
-                     prog->Parameters->ParameterValues[base][j].i;
+                  params[k++] = ctx->Const.NativeIntegers ?
+                     prog->Parameters->ParameterValues[base][j].i :
+                     (GLint) prog->Parameters->ParameterValues[base][j].f;
                }
             }
          }
@@ -468,9 +468,9 @@ get_uniform(struct gl_context *ctx, GLuint program, GLint location,
             for (i = 0; i < rows; i++) {
                const int base = paramPos + offset + i;
                for (j = 0; j < cols; j++ ) {
-                  params[k++] = ctx->Const.GLSLVersion <= 120 ? 
-                     (GLuint) prog->Parameters->ParameterValues[base][j].f : 
-                     prog->Parameters->ParameterValues[base][j].u;
+                  params[k++] = ctx->Const.NativeIntegers ?
+                     prog->Parameters->ParameterValues[base][j].u :
+                     (GLuint) prog->Parameters->ParameterValues[base][j].f;
                }
             }
          }
@@ -750,7 +750,7 @@ set_program_uniform(struct gl_context *ctx, struct gl_program *program,
          if (basicType == GL_INT) {
             const GLint *iValues = ((const GLint *) values) + k * elems;
             for (i = 0; i < elems; i++) {
-               if (ctx->Const.GLSLVersion <= 120)
+               if (!ctx->Const.NativeIntegers)
                   uniformVal[i].f = (GLfloat) iValues[i];
                else
                   uniformVal[i].i = iValues[i];
@@ -759,7 +759,7 @@ set_program_uniform(struct gl_context *ctx, struct gl_program *program,
          else if (basicType == GL_UNSIGNED_INT) {
             const GLuint *iValues = ((const GLuint *) values) + k * elems;
             for (i = 0; i < elems; i++) {
-               if (ctx->Const.GLSLVersion <= 120)
+               if (!ctx->Const.NativeIntegers)
                   uniformVal[i].f = (GLfloat)(GLuint) iValues[i];
                else
                   uniformVal[i].u = iValues[i];
@@ -781,7 +781,7 @@ set_program_uniform(struct gl_context *ctx, struct gl_program *program,
                else
                   uniformVal[i].b = uniformVal[i].u ? 1 : 0;
                
-               if (ctx->Const.GLSLVersion <= 120)
+               if (!ctx->Const.NativeIntegers)
                   uniformVal[i].f = uniformVal[i].b ? 1.0f : 0.0f;
             }
          }
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index 7b90c81..886a177 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -295,6 +295,7 @@ public:
    bool indirect_addr_consts;
    
    int glsl_version;
+   bool native_integers;
 
    variable_storage *find_variable_storage(ir_variable *var);
 
@@ -600,7 +601,7 @@ glsl_to_tgsi_visitor::get_opcode(ir_instruction *ir, unsigned op,
    
    if (src0.type == GLSL_TYPE_FLOAT || src1.type == GLSL_TYPE_FLOAT)
       type = GLSL_TYPE_FLOAT;
-   else if (glsl_version >= 130)
+   else if (native_integers)
       type = src0.type;
 
 #define case4(c, f, i, u) \
@@ -881,7 +882,7 @@ glsl_to_tgsi_visitor::st_src_reg_for_int(int val)
    st_src_reg src(PROGRAM_IMMEDIATE, -1, GLSL_TYPE_INT);
    union gl_constant_value uval;
    
-   assert(glsl_version >= 130);
+   assert(native_integers);
 
    uval.i = val;
    src.index = add_constant(src.file, &uval, 1, GL_INT, &src.swizzle);
@@ -892,7 +893,7 @@ glsl_to_tgsi_visitor::st_src_reg_for_int(int val)
 struct st_src_reg
 glsl_to_tgsi_visitor::st_src_reg_for_type(int type, int val)
 {
-   if (glsl_version >= 130)
+   if (native_integers)
       return type == GLSL_TYPE_FLOAT ? st_src_reg_for_float(val) : 
                                        st_src_reg_for_int(val);
    else
@@ -950,7 +951,7 @@ glsl_to_tgsi_visitor::get_temp(const glsl_type *type)
 {
    st_src_reg src;
 
-   src.type = glsl_version >= 130 ? type->base_type : GLSL_TYPE_FLOAT;
+   src.type = native_integers ? type->base_type : GLSL_TYPE_FLOAT;
    src.file = PROGRAM_TEMPORARY;
    src.index = next_temp;
    src.reladdr = NULL;
@@ -1053,7 +1054,7 @@ glsl_to_tgsi_visitor::visit(ir_variable *ir)
          this->next_temp += type_size(ir->type);
 
          dst = st_dst_reg(st_src_reg(PROGRAM_TEMPORARY, storage->index,
-               glsl_version >= 130 ? ir->type->base_type : GLSL_TYPE_FLOAT));
+               native_integers ? ir->type->base_type : GLSL_TYPE_FLOAT));
       }
 
 
@@ -1069,7 +1070,7 @@ glsl_to_tgsi_visitor::visit(ir_variable *ir)
             }
          } else {
             st_src_reg src(PROGRAM_STATE_VAR, index,
-                  glsl_version >= 130 ? ir->type->base_type : GLSL_TYPE_FLOAT);
+                  native_integers ? ir->type->base_type : GLSL_TYPE_FLOAT);
             src.swizzle = slots[i].swizzle;
             emit(ir, TGSI_OPCODE_MOV, dst, src);
             /* even a float takes up a whole vec4 reg in a struct/array. */
@@ -1444,7 +1445,7 @@ glsl_to_tgsi_visitor::visit(ir_expression *ir)
       /* "==" operator producing a scalar boolean. */
       if (ir->operands[0]->type->is_vector() ||
           ir->operands[1]->type->is_vector()) {
-         st_src_reg temp = get_temp(glsl_version >= 130 ? 
+         st_src_reg temp = get_temp(native_integers ?
                glsl_type::get_instance(ir->operands[0]->type->base_type, 4, 1) :
                glsl_type::vec4_type);
          assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
@@ -1459,7 +1460,7 @@ glsl_to_tgsi_visitor::visit(ir_expression *ir)
       /* "!=" operator producing a scalar boolean. */
       if (ir->operands[0]->type->is_vector() ||
           ir->operands[1]->type->is_vector()) {
-         st_src_reg temp = get_temp(glsl_version >= 130 ? 
+         st_src_reg temp = get_temp(native_integers ?
                glsl_type::get_instance(ir->operands[0]->type->base_type, 4, 1) :
                glsl_type::vec4_type);
          assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
@@ -1514,7 +1515,7 @@ glsl_to_tgsi_visitor::visit(ir_expression *ir)
       break;
    case ir_unop_i2f:
    case ir_unop_b2f:
-      if (glsl_version >= 130) {
+      if (native_integers) {
          emit(ir, TGSI_OPCODE_I2F, result_dst, op[0]);
          break;
       }
@@ -1526,7 +1527,7 @@ glsl_to_tgsi_visitor::visit(ir_expression *ir)
       result_src = op[0];
       break;
    case ir_unop_f2i:
-      if (glsl_version >= 130)
+      if (native_integers)
          emit(ir, TGSI_OPCODE_F2I, result_dst, op[0]);
       else
          emit(ir, TGSI_OPCODE_TRUNC, result_dst, op[0]);
@@ -1567,7 +1568,7 @@ glsl_to_tgsi_visitor::visit(ir_expression *ir)
          break;
       }
    case ir_unop_u2f:
-      if (glsl_version >= 130) {
+      if (native_integers) {
          emit(ir, TGSI_OPCODE_U2F, result_dst, op[0]);
          break;
       }
@@ -1719,7 +1720,7 @@ glsl_to_tgsi_visitor::visit(ir_dereference_variable *ir)
    }
 
    this->result = st_src_reg(entry->file, entry->index, var->type);
-   if (glsl_version <= 120)
+   if (!native_integers)
       this->result.type = GLSL_TYPE_FLOAT;
 }
 
@@ -2109,27 +2110,27 @@ glsl_to_tgsi_visitor::visit(ir_constant *ir)
       }
       break;
    case GLSL_TYPE_UINT:
-      gl_type = glsl_version >= 130 ? GL_UNSIGNED_INT : GL_FLOAT;
+      gl_type = native_integers ? GL_UNSIGNED_INT : GL_FLOAT;
       for (i = 0; i < ir->type->vector_elements; i++) {
-         if (glsl_version >= 130)
+         if (native_integers)
             values[i].u = ir->value.u[i];
          else
             values[i].f = ir->value.u[i];
       }
       break;
    case GLSL_TYPE_INT:
-      gl_type = glsl_version >= 130 ? GL_INT : GL_FLOAT;
+      gl_type = native_integers ? GL_INT : GL_FLOAT;
       for (i = 0; i < ir->type->vector_elements; i++) {
-         if (glsl_version >= 130)
+         if (native_integers)
             values[i].i = ir->value.i[i];
          else
             values[i].f = ir->value.i[i];
       }
       break;
    case GLSL_TYPE_BOOL:
-      gl_type = glsl_version >= 130 ? GL_BOOL : GL_FLOAT;
+      gl_type = native_integers ? GL_BOOL : GL_FLOAT;
       for (i = 0; i < ir->type->vector_elements; i++) {
-         if (glsl_version >= 130)
+         if (native_integers)
             values[i].b = ir->value.b[i];
          else
             values[i].f = ir->value.b[i];
@@ -3611,6 +3612,7 @@ get_pixel_transfer_visitor(struct st_fragment_program *fp,
    v->ctx = original->ctx;
    v->prog = prog;
    v->glsl_version = original->glsl_version;
+   v->native_integers = original->native_integers;
    v->options = original->options;
    v->next_temp = original->next_temp;
    v->num_address_regs = original->num_address_regs;
@@ -3739,6 +3741,7 @@ get_bitmap_visitor(struct st_fragment_program *fp,
    v->ctx = original->ctx;
    v->prog = prog;
    v->glsl_version = original->glsl_version;
+   v->native_integers = original->native_integers;
    v->options = original->options;
    v->next_temp = original->next_temp;
    v->num_address_regs = original->num_address_regs;
@@ -4674,6 +4677,7 @@ get_mesa_program(struct gl_context *ctx,
    v->shader_program = shader_program;
    v->options = options;
    v->glsl_version = ctx->Const.GLSLVersion;
+   v->native_integers = ctx->Const.NativeIntegers;
 
    add_uniforms_to_parameters_list(shader_program, shader, prog);
 



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