glsl: Remove shader stage checking for extension handling.

Certain extensions only add functionality to particular shader stages.
(For example, ARB_draw_instanced only adds variables to the vertex
shader stage.)

Previously, we only allowed such extensions to be enabled in the shader
stages where they're useful.  However, I've never found any text which
mandates that behavior; in my opinion, you should be able to turn on
extensions in any shader stage, even if they have no effect.

Fixes Piglit tests glslparsertest/glsl2/draw_buffers-05.vert and
ARB_draw_instanced/preprocessor/feature-macro-enabled.frag.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=29185
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>

diff --git a/src/glsl/glsl_parser_extras.cpp b/src/glsl/glsl_parser_extras.cpp
index e36ba584a675695c4d367f96f6e1dcd97aad9536..4f8fcab98dbf77e6f7308c79ab4892adec51c307 100644 (file)
--- a/src/glsl/glsl_parser_extras.cpp
+++ b/src/glsl/glsl_parser_extras.cpp
@@ -430,15 +430,6 @@ struct _mesa_glsl_extension {
     */
    const char *name;
 
-   /** True if this extension is available to vertex shaders */
-   bool avail_in_VS;
-
-   /** True if this extension is available to geometry shaders */
-   bool avail_in_GS;
-
-   /** True if this extension is available to fragment shaders */
-   bool avail_in_FS;
-
    /** True if this extension is available to desktop GL shaders */
    bool avail_in_GL;
 
@@ -485,9 +476,9 @@ struct _mesa_glsl_extension {
    void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
 };
 
-#define EXT(NAME, VS, GS, FS, GL, ES, SUPPORTED_FLAG)                   \
-   { "GL_" #NAME, VS, GS, FS, GL, ES, &gl_extensions::SUPPORTED_FLAG,   \
-         &_mesa_glsl_parse_state::NAME##_enable,                        \
+#define EXT(NAME, GL, ES, SUPPORTED_FLAG)                   \
+   { "GL_" #NAME, GL, ES, &gl_extensions::SUPPORTED_FLAG,   \
+         &_mesa_glsl_parse_state::NAME##_enable,            \
          &_mesa_glsl_parse_state::NAME##_warn }
 
 /**
@@ -495,31 +486,31 @@ struct _mesa_glsl_extension {
  * and the conditions under which they are supported.
  */
 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
-   /*                                  target availability  API availability */
-   /* name                             VS     GS     FS     GL     ES         supported flag */
-   EXT(ARB_conservative_depth,         false, false, true,  true,  false,     ARB_conservative_depth),
-   EXT(ARB_draw_buffers,               false, false, true,  true,  false,     dummy_true),
-   EXT(ARB_draw_instanced,             true,  false, false, true,  false,     ARB_draw_instanced),
-   EXT(ARB_explicit_attrib_location,   true,  false, true,  true,  false,     ARB_explicit_attrib_location),
-   EXT(ARB_fragment_coord_conventions, true,  false, true,  true,  false,     ARB_fragment_coord_conventions),
-   EXT(ARB_texture_rectangle,          true,  false, true,  true,  false,     dummy_true),
-   EXT(EXT_texture_array,              true,  false, true,  true,  false,     EXT_texture_array),
-   EXT(ARB_shader_texture_lod,         true,  false, true,  true,  false,     ARB_shader_texture_lod),
-   EXT(ARB_shader_stencil_export,      false, false, true,  true,  false,     ARB_shader_stencil_export),
-   EXT(AMD_conservative_depth,         false, false, true,  true,  false,     ARB_conservative_depth),
-   EXT(AMD_shader_stencil_export,      false, false, true,  true,  false,     ARB_shader_stencil_export),
-   EXT(OES_texture_3D,                 true,  false, true,  false, true,      EXT_texture3D),
-   EXT(OES_EGL_image_external,         true,  false, true,  false, true,      OES_EGL_image_external),
-   EXT(ARB_shader_bit_encoding,        true,  true,  true,  true,  false,     ARB_shader_bit_encoding),
-   EXT(ARB_uniform_buffer_object,      true,  false, true,  true,  false,     ARB_uniform_buffer_object),
-   EXT(OES_standard_derivatives,       false, false, true,  false,  true,     OES_standard_derivatives),
-   EXT(ARB_texture_cube_map_array,     true,  false, true,  true,  false,     ARB_texture_cube_map_array),
-   EXT(ARB_shading_language_packing,   true,  false, true,  true,  false,     ARB_shading_language_packing),
-   EXT(ARB_shading_language_420pack,   true,  true,  true,  true,  false,     ARB_shading_language_420pack),
-   EXT(ARB_texture_multisample,        true,  false, true,  true,  false,     ARB_texture_multisample),
-   EXT(ARB_texture_query_lod,          false, false, true,  true,  false,     ARB_texture_query_lod),
-   EXT(ARB_gpu_shader5,                true,  true,  true,  true,  false,     ARB_gpu_shader5),
-   EXT(AMD_vertex_shader_layer,        true,  false, false, true,  false,     AMD_vertex_shader_layer),
+   /*                                  API availability */
+   /* name                             GL     ES         supported flag */
+   EXT(ARB_conservative_depth,         true,  false,     ARB_conservative_depth),
+   EXT(ARB_draw_buffers,               true,  false,     dummy_true),
+   EXT(ARB_draw_instanced,             true,  false,     ARB_draw_instanced),
+   EXT(ARB_explicit_attrib_location,   true,  false,     ARB_explicit_attrib_location),
+   EXT(ARB_fragment_coord_conventions, true,  false,     ARB_fragment_coord_conventions),
+   EXT(ARB_texture_rectangle,          true,  false,     dummy_true),
+   EXT(EXT_texture_array,              true,  false,     EXT_texture_array),
+   EXT(ARB_shader_texture_lod,         true,  false,     ARB_shader_texture_lod),
+   EXT(ARB_shader_stencil_export,      true,  false,     ARB_shader_stencil_export),
+   EXT(AMD_conservative_depth,         true,  false,     ARB_conservative_depth),
+   EXT(AMD_shader_stencil_export,      true,  false,     ARB_shader_stencil_export),
+   EXT(OES_texture_3D,                 false, true,      EXT_texture3D),
+   EXT(OES_EGL_image_external,         false, true,      OES_EGL_image_external),
+   EXT(ARB_shader_bit_encoding,        true,  false,     ARB_shader_bit_encoding),
+   EXT(ARB_uniform_buffer_object,      true,  false,     ARB_uniform_buffer_object),
+   EXT(OES_standard_derivatives,       false,  true,     OES_standard_derivatives),
+   EXT(ARB_texture_cube_map_array,     true,  false,     ARB_texture_cube_map_array),
+   EXT(ARB_shading_language_packing,   true,  false,     ARB_shading_language_packing),
+   EXT(ARB_shading_language_420pack,   true,  false,     ARB_shading_language_420pack),
+   EXT(ARB_texture_multisample,        true,  false,     ARB_texture_multisample),
+   EXT(ARB_texture_query_lod,          true,  false,     ARB_texture_query_lod),
+   EXT(ARB_gpu_shader5,                true,  false,     ARB_gpu_shader5),
+   EXT(AMD_vertex_shader_layer,        true,  false,     AMD_vertex_shader_layer),
 };
 
 #undef EXT
@@ -532,30 +523,6 @@ static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
 bool _mesa_glsl_extension::compatible_with_state(const _mesa_glsl_parse_state *
                                                  state) const
 {
-   /* Check that this extension matches the type of shader we are
-    * compiling to.
-    */
-   switch (state->target) {
-   case vertex_shader:
-      if (!this->avail_in_VS) {
-         return false;
-      }
-      break;
-   case geometry_shader:
-      if (!this->avail_in_GS) {
-         return false;
-      }
-      break;
-   case fragment_shader:
-      if (!this->avail_in_FS) {
-         return false;
-      }
-      break;
-   default:
-      assert (!"Unrecognized shader target");
-      return false;
-   }
-
    /* Check that this extension matches whether we are compiling
     * for desktop GL or GLES.
     */