Unify ARB_depth_texture and SGIX_depth_texture

The ARB extension is a superset of the older SGIX extension.  Any
hardware that can support the SGIX version can also support the ARB
version.  In Mesa, any driver that supports one also supports the
other.  This unification just simplifies some bits of code.

11 files changed, 20 insertions, 31 deletions

diff --git a/src/mesa/drivers/dri/i915/i915_context.c b/src/mesa/drivers/dri/i915/i915_context.c
index efcac911aa..e0ddc7fd61 100644
--- a/src/mesa/drivers/dri/i915/i915_context.c
+++ b/src/mesa/drivers/dri/i915/i915_context.c
@@ -56,8 +56,6 @@ static const struct dri_extension i915_extensions[] = {
    {"GL_ARB_shadow", NULL},
    {"GL_ARB_texture_non_power_of_two", NULL},
    {"GL_EXT_shadow_funcs", NULL},
-   /* ARB extn won't work if not enabled */
-   {"GL_SGIX_depth_texture", NULL},
    {NULL, NULL}
 };
 
diff --git a/src/mesa/drivers/dri/intel/intel_context.c b/src/mesa/drivers/dri/intel/intel_context.c
index 1dd3ee7d0a..e53972c46d 100644
--- a/src/mesa/drivers/dri/intel/intel_context.c
+++ b/src/mesa/drivers/dri/intel/intel_context.c
@@ -404,8 +404,6 @@ static const struct dri_extension brw_extensions[] = {
    { "GL_ARB_vertex_shader",              GL_ARB_vertex_shader_functions },
    { "GL_EXT_shadow_funcs",               NULL },
    { "GL_EXT_texture_sRGB",		  NULL },
-   /* ARB extn won't work if not enabled */
-   { "GL_SGIX_depth_texture",             NULL },
    { NULL,                                NULL }
 };
 
diff --git a/src/mesa/drivers/dri/intel/intel_tex_copy.c b/src/mesa/drivers/dri/intel/intel_tex_copy.c
index a7b88b39c0..f4cb4a781c 100644
--- a/src/mesa/drivers/dri/intel/intel_tex_copy.c
+++ b/src/mesa/drivers/dri/intel/intel_tex_copy.c
@@ -60,7 +60,7 @@ get_teximage_source(struct intel_context *intel, GLenum internalFormat)
 
    switch (internalFormat) {
    case GL_DEPTH_COMPONENT:
-   case GL_DEPTH_COMPONENT16_ARB:
+   case GL_DEPTH_COMPONENT16:
       irb = intel_get_renderbuffer(intel->ctx.ReadBuffer, BUFFER_DEPTH);
       if (irb && irb->region && irb->region->cpp == 2)
          return irb->region;
diff --git a/src/mesa/drivers/dri/r300/r300_context.c b/src/mesa/drivers/dri/r300/r300_context.c
index ee4a69dce3..37436275e3 100644
--- a/src/mesa/drivers/dri/r300/r300_context.c
+++ b/src/mesa/drivers/dri/r300/r300_context.c
@@ -138,7 +138,6 @@ const struct dri_extension card_extensions[] = {
   {"GL_NV_blend_square",		NULL},
   {"GL_NV_vertex_program",		GL_NV_vertex_program_functions},
   {"GL_SGIS_generate_mipmap",		NULL},
-  {"GL_SGIX_depth_texture",		NULL},
   {NULL,				NULL}
   /* *INDENT-ON* */
 };
diff --git a/src/mesa/main/depthstencil.c b/src/mesa/main/depthstencil.c
index fb54d6184d..9d208e2997 100644
--- a/src/mesa/main/depthstencil.c
+++ b/src/mesa/main/depthstencil.c
@@ -282,8 +282,8 @@ _mesa_new_z24_renderbuffer_wrapper(GLcontext *ctx,
    z24rb->RefCount = 1;
    z24rb->Width = dsrb->Width;
    z24rb->Height = dsrb->Height;
-   z24rb->InternalFormat = GL_DEPTH_COMPONENT24_ARB;
-   z24rb->_ActualFormat = GL_DEPTH_COMPONENT24_ARB;
+   z24rb->InternalFormat = GL_DEPTH_COMPONENT24;
+   z24rb->_ActualFormat = GL_DEPTH_COMPONENT24;
    z24rb->_BaseFormat = GL_DEPTH_COMPONENT;
    z24rb->DataType = GL_UNSIGNED_INT;
    z24rb->DepthBits = 24;
diff --git a/src/mesa/main/extensions.c b/src/mesa/main/extensions.c
index ddcb44f06b..de75325f15 100644
--- a/src/mesa/main/extensions.c
+++ b/src/mesa/main/extensions.c
@@ -165,7 +165,7 @@ static const struct {
    { OFF, "GL_SGIS_texture_border_clamp",      F(ARB_texture_border_clamp) },
    { ON,  "GL_SGIS_texture_edge_clamp",        F(SGIS_texture_edge_clamp) },
    { ON,  "GL_SGIS_texture_lod",               F(SGIS_texture_lod) },
-   { OFF, "GL_SGIX_depth_texture",             F(SGIX_depth_texture) },
+   { OFF, "GL_SGIX_depth_texture",             F(ARB_depth_texture) },
    { OFF, "GL_SGIX_shadow",                    F(SGIX_shadow) },
    { OFF, "GL_SGIX_shadow_ambient",            F(SGIX_shadow_ambient) },
    { OFF, "GL_SUN_multi_draw_arrays",          F(EXT_multi_draw_arrays) },
@@ -292,7 +292,6 @@ _mesa_enable_sw_extensions(GLcontext *ctx)
    ctx->Extensions.SGI_texture_color_table = GL_TRUE;
    ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;
    ctx->Extensions.SGIS_texture_edge_clamp = GL_TRUE;
-   ctx->Extensions.SGIX_depth_texture = GL_TRUE;
    ctx->Extensions.SGIX_shadow = GL_TRUE;
    ctx->Extensions.SGIX_shadow_ambient = GL_TRUE;
 #if FEATURE_ARB_vertex_program || FEATURE_ARB_fragment_program
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 19cf6f56d1..62bc65cc72 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -2626,7 +2626,6 @@ struct gl_extensions
    GLboolean SGIS_generate_mipmap;
    GLboolean SGIS_texture_edge_clamp;
    GLboolean SGIS_texture_lod;
-   GLboolean SGIX_depth_texture;
    GLboolean SGIX_shadow;
    GLboolean SGIX_shadow_ambient; /* or GL_ARB_shadow_ambient */
    GLboolean TDFX_texture_compression_FXT1;
diff --git a/src/mesa/main/texformat.c b/src/mesa/main/texformat.c
index d4ccdf9fa0..4442ce39a4 100644
--- a/src/mesa/main/texformat.c
+++ b/src/mesa/main/texformat.c
@@ -1420,14 +1420,13 @@ _mesa_choose_tex_format( GLcontext *ctx, GLint internalFormat,
          ; /* fallthrough */
    }
 
-   if (ctx->Extensions.SGIX_depth_texture ||
-       ctx->Extensions.ARB_depth_texture) {
+   if (ctx->Extensions.ARB_depth_texture) {
       switch (internalFormat) {
          case GL_DEPTH_COMPONENT:
-         case GL_DEPTH_COMPONENT24_SGIX:
-         case GL_DEPTH_COMPONENT32_SGIX:
+         case GL_DEPTH_COMPONENT24:
+         case GL_DEPTH_COMPONENT32:
             return &_mesa_texformat_z32;
-         case GL_DEPTH_COMPONENT16_SGIX:
+         case GL_DEPTH_COMPONENT16:
             return &_mesa_texformat_z16;
          default:
             ; /* fallthrough */
diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c
index b0a2d6ddb3..4a419fde26 100644
--- a/src/mesa/main/teximage.c
+++ b/src/mesa/main/teximage.c
@@ -241,13 +241,12 @@ _mesa_base_tex_format( GLcontext *ctx, GLint internalFormat )
       }
    }
 
-   if (ctx->Extensions.SGIX_depth_texture ||
-       ctx->Extensions.ARB_depth_texture) {
+   if (ctx->Extensions.ARB_depth_texture) {
       switch (internalFormat) {
          case GL_DEPTH_COMPONENT:
-         case GL_DEPTH_COMPONENT16_SGIX:
-         case GL_DEPTH_COMPONENT24_SGIX:
-         case GL_DEPTH_COMPONENT32_SGIX:
+         case GL_DEPTH_COMPONENT16:
+         case GL_DEPTH_COMPONENT24:
+         case GL_DEPTH_COMPONENT32:
             return GL_DEPTH_COMPONENT;
          default:
             ; /* fallthrough */
@@ -526,9 +525,9 @@ static GLboolean
 is_depth_format(GLenum format)
 {
    switch (format) {
-      case GL_DEPTH_COMPONENT16_ARB:
-      case GL_DEPTH_COMPONENT24_ARB:
-      case GL_DEPTH_COMPONENT32_ARB:
+      case GL_DEPTH_COMPONENT16:
+      case GL_DEPTH_COMPONENT24:
+      case GL_DEPTH_COMPONENT32:
       case GL_DEPTH_COMPONENT:
          return GL_TRUE;
       default:
@@ -2297,8 +2296,7 @@ _mesa_GetTexImage( GLenum target, GLint level, GLenum format,
       return;
    }
 
-   if (!ctx->Extensions.SGIX_depth_texture &&
-       !ctx->Extensions.ARB_depth_texture && is_depth_format(format)) {
+   if (!ctx->Extensions.ARB_depth_texture && is_depth_format(format)) {
       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
       return;
    }
diff --git a/src/mesa/main/texparam.c b/src/mesa/main/texparam.c
index acddb6663b..a9e752a637 100644
--- a/src/mesa/main/texparam.c
+++ b/src/mesa/main/texparam.c
@@ -642,8 +642,7 @@ _mesa_GetTexLevelParameteriv( GLenum target, GLint level,
             *params = 0;
          break;
       case GL_TEXTURE_DEPTH_SIZE_ARB:
-         if (ctx->Extensions.SGIX_depth_texture ||
-             ctx->Extensions.ARB_depth_texture)
+         if (ctx->Extensions.ARB_depth_texture)
             *params = img->TexFormat->DepthBits;
          else
             _mesa_error(ctx, GL_INVALID_ENUM,
diff --git a/src/mesa/swrast/s_texstore.c b/src/mesa/swrast/s_texstore.c
index 15d52aa587..16b00b9fa1 100644
--- a/src/mesa/swrast/s_texstore.c
+++ b/src/mesa/swrast/s_texstore.c
@@ -216,9 +216,9 @@ is_depth_format(GLenum format)
 {
    switch (format) {
       case GL_DEPTH_COMPONENT:
-      case GL_DEPTH_COMPONENT16_SGIX:
-      case GL_DEPTH_COMPONENT24_SGIX:
-      case GL_DEPTH_COMPONENT32_SGIX:
+      case GL_DEPTH_COMPONENT16:
+      case GL_DEPTH_COMPONENT24:
+      case GL_DEPTH_COMPONENT32:
          return GL_TRUE;
       default:
          return GL_FALSE;