mesa: add support for ATI_envmap_bumpmap

add new entrypoints, new texture format, etc
translate in texenvprogram.c for drivers using the mesa-generated tex env
fragment program
also handled in swrast, but not tested (cannot work due to negative texel
results not handled correctly)

1 files changed, 173 insertions, 1 deletions

diff --git a/src/mesa/main/texenv.c b/src/mesa/main/texenv.c
index 95547a500e..c2960fc820 100644
--- a/src/mesa/main/texenv.c
+++ b/src/mesa/main/texenv.c
@@ -142,7 +142,11 @@ set_combiner_mode(GLcontext *ctx,
    case GL_MODULATE_ADD_ATI:
    case GL_MODULATE_SIGNED_ADD_ATI:
    case GL_MODULATE_SUBTRACT_ATI:
-      legal =ctx->Extensions.ATI_texture_env_combine3;
+      legal = ctx->Extensions.ATI_texture_env_combine3;
+      break;
+   case GL_BUMP_ENVMAP_ATI:
+      legal = (ctx->Extensions.ATI_envmap_bumpmap &&
+               pname == GL_COMBINE_RGB);
       break;
    default:
       legal = GL_FALSE;
@@ -500,6 +504,26 @@ _mesa_TexEnvfv( GLenum target, GLenum pname, const GLfloat *param )
       case GL_ALPHA_SCALE:
          set_combiner_scale(ctx, texUnit, pname, param[0]);
 	 break;
+      case GL_BUMP_TARGET_ATI:
+         if (!ctx->Extensions.ATI_envmap_bumpmap) {
+	    _mesa_error( ctx, GL_INVALID_ENUM, "glTexEnv(pname=0x%x)", pname );
+	    return;
+	 }
+	 if (((GLenum) (GLint) param[0] < GL_TEXTURE0) ||
+	 ((GLenum) (GLint) param[0] > GL_TEXTURE31)) {
+	    /* spec doesn't say this but it seems logical */
+	    _mesa_error( ctx, GL_INVALID_ENUM, "glTexEnv(param=0x%x)", (GLenum) (GLint) param[0]);
+	    return;
+	 }
+	 if (!((1 << ((GLenum) (GLint) param[0] - GL_TEXTURE0)) & ctx->Const.SupportedBumpUnits)) {
+	    _mesa_error( ctx, GL_INVALID_VALUE, "glTexEnv(param=0x%x)", (GLenum) (GLint) param[0]);
+	    return;
+	 }
+	 else {
+	    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	    texUnit->BumpTarget = (GLenum) (GLint) param[0];
+	 }
+	 break;
       default:
 	 _mesa_error( ctx, GL_INVALID_ENUM, "glTexEnv(pname)" );
 	 return;
@@ -735,6 +759,16 @@ get_texenvi(GLcontext *ctx, const struct gl_texture_unit *texUnit,
          _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
       }
       break;
+   case GL_BUMP_TARGET_ATI:
+      /* spec doesn't say so, but I think this should be queryable */
+      if (ctx->Extensions.ATI_envmap_bumpmap) {
+         return texUnit->BumpTarget;
+      }
+      else {
+         _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
+      }
+      break;
+
    default:
       ;
    }
@@ -874,4 +908,142 @@ _mesa_GetTexEnviv( GLenum target, GLenum pname, GLint *params )
    }
 }
 
+/* why does ATI_envmap_bumpmap require new entrypoints? Should just
+   reuse TexEnv ones... */
+void GLAPIENTRY
+_mesa_TexBumpParameterivATI( GLenum pname, const GLint *param )
+{
+   GLfloat p[4];
+   if (pname == GL_BUMP_ROT_MATRIX_ATI) {
+      /* hope that conversion is correct here */
+      p[0] = INT_TO_FLOAT( param[0] );
+      p[1] = INT_TO_FLOAT( param[1] );
+      p[2] = INT_TO_FLOAT( param[2] );
+      p[3] = INT_TO_FLOAT( param[3] );
+   }
+   else {
+      p[0] = (GLfloat) param[0];
+      p[1] = p[2] = p[3] = 0;  /* init to zero, just to be safe */
+   }
+   _mesa_TexBumpParameterfvATI( pname, p );
+}
+
+void GLAPIENTRY
+_mesa_TexBumpParameterfvATI( GLenum pname, const GLfloat *param )
+{
+   struct gl_texture_unit *texUnit;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   /* should return error if extension not supported? */
+   texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+
+   if (pname == GL_BUMP_ROT_MATRIX_ATI) {
+      if (TEST_EQ_4V(param, texUnit->RotMatrix))
+         return;
+      FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+      COPY_4FV(texUnit->RotMatrix, param);
+   }
+   else {
+      _mesa_error( ctx, GL_INVALID_ENUM, "glTexBumpParameter(pname)" );
+      return;
+   }
+   /* Drivers might want to know about this, instead of dedicated function
+      just shove it into TexEnv where it really belongs anyway */
+   if (ctx->Driver.TexEnv) {
+      (*ctx->Driver.TexEnv)( ctx, 0, pname, param );
+   }
+}
+
+void GLAPIENTRY
+_mesa_GetTexBumpParameterivATI( GLenum pname, GLint *param )
+{
+   const struct gl_texture_unit *texUnit;
+   GLint i;
+   GLint temp = 0;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   /* should return error if extension not supported? */
+   texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+
+   if (pname == GL_BUMP_ROT_MATRIX_SIZE_ATI) {
+      /* spec leaves open to support larger matrices.
+         Don't think anyone would ever want to use it
+         (and apps almost certainly would not understand it and
+         thus fail to submit matrices correctly) so hardcode this. */
+      *param = 4;
+   }
+   else if (pname == GL_BUMP_ROT_MATRIX_ATI) {
+      /* hope that conversion is correct here */
+      param[0] = FLOAT_TO_INT(texUnit->RotMatrix[0]);
+      param[1] = FLOAT_TO_INT(texUnit->RotMatrix[1]);
+      param[2] = FLOAT_TO_INT(texUnit->RotMatrix[2]);
+      param[3] = FLOAT_TO_INT(texUnit->RotMatrix[3]);
+   }
+   else if (pname == GL_BUMP_NUM_TEX_UNITS_ATI) {
+      for (i = 0; i < ctx->Const.MaxTextureImageUnits; i++) {
+         if (ctx->Const.SupportedBumpUnits & (1 << i)) {
+            temp++;
+         }
+      }
+      *param = temp;
+   }
+   else if (pname == GL_BUMP_TEX_UNITS_ATI) {
+      for (i = 0; i < ctx->Const.MaxTextureImageUnits; i++) {
+         if (ctx->Const.SupportedBumpUnits & (1 << i)) {
+            *param++ = i + GL_TEXTURE0;
+         }
+      }
+   }
+   else {
+      _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexBumpParameter(pname)" );
+      return;
+   }
+}
+
+void GLAPIENTRY
+_mesa_GetTexBumpParameterfvATI( GLenum pname, GLfloat *param )
+{
+   const struct gl_texture_unit *texUnit;
+   GLint i;
+   GLint temp = 0;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   /* should return error if extension not supported? */
+   texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+
+   if (pname == GL_BUMP_ROT_MATRIX_SIZE_ATI) {
+      /* spec leaves open to support larger matrices.
+         Don't think anyone would ever want to use it
+         (and apps might not understand it) so hardcode this. */
+      *param = (GLfloat) 4;
+   }
+   else if (pname == GL_BUMP_ROT_MATRIX_ATI) {
+      param[0] = texUnit->RotMatrix[0];
+      param[1] = texUnit->RotMatrix[1];
+      param[2] = texUnit->RotMatrix[2];
+      param[3] = texUnit->RotMatrix[3];
+   }
+   else if (pname == GL_BUMP_NUM_TEX_UNITS_ATI) {
+      for (i = 0; i < ctx->Const.MaxTextureImageUnits; i++) {
+         if (ctx->Const.SupportedBumpUnits & (1 << i)) {
+            temp++;
+         }
+      }
+      *param = (GLfloat) temp;
+   }
+   else if (pname == GL_BUMP_TEX_UNITS_ATI) {
+      for (i = 0; i < ctx->Const.MaxTextureImageUnits; i++) {
+         if (ctx->Const.SupportedBumpUnits & (1 << i)) {
+            *param++ = (GLfloat) (i + GL_TEXTURE0);
+         }
+      }
+   }
+   else {
+      _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexBumpParameter(pname)" );
+      return;
+   }
+}