st/mesa: add option to enable GLSL 1.40
[mesa.git] / src / mesa / state_tracker / st_extensions.c
index 0ffeae067388fd53d6d354c26c630ba627d5d4f3..ca762cab4b27dcd9c90c1016fe7c4f4aaf78261f 100644 (file)
@@ -90,11 +90,13 @@ void st_init_limits(struct st_context *st)
       = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS);
 
    c->MaxTextureImageUnits
-      = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS),
+      = _min(screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
+                                      PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS),
             MAX_TEXTURE_IMAGE_UNITS);
 
    c->MaxVertexTextureImageUnits
-      = _min(screen->get_param(screen, PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS),
+      = _min(screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
+                                      PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS),
              MAX_VERTEX_TEXTURE_IMAGE_UNITS);
 
    c->MaxCombinedTextureImageUnits
@@ -106,19 +108,35 @@ void st_init_limits(struct st_context *st)
 
    c->MaxTextureUnits = _min(c->MaxTextureImageUnits, c->MaxTextureCoordUnits);
 
+   /* Define max viewport size and max renderbuffer size in terms of
+    * max texture size (note: max tex RECT size = max tex 2D size).
+    * If this isn't true for some hardware we'll need new PIPE_CAP_ queries.
+    */
+   c->MaxViewportWidth =
+   c->MaxViewportHeight =
+   c->MaxRenderbufferSize = c->MaxTextureRectSize;
+
    c->MaxDrawBuffers
       = _clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
               1, MAX_DRAW_BUFFERS);
 
+   c->MaxDualSourceDrawBuffers
+      = _clamp(screen->get_param(screen, PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS),
+              0, MAX_DRAW_BUFFERS);
+
    c->MaxLineWidth
-      = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_LINE_WIDTH));
+      = _maxf(1.0f, screen->get_paramf(screen,
+                                       PIPE_CAPF_MAX_LINE_WIDTH));
    c->MaxLineWidthAA
-      = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_LINE_WIDTH_AA));
+      = _maxf(1.0f, screen->get_paramf(screen,
+                                       PIPE_CAPF_MAX_LINE_WIDTH_AA));
 
    c->MaxPointSize
-      = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_POINT_WIDTH));
+      = _maxf(1.0f, screen->get_paramf(screen,
+                                       PIPE_CAPF_MAX_POINT_WIDTH));
    c->MaxPointSizeAA
-      = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_POINT_WIDTH_AA));
+      = _maxf(1.0f, screen->get_paramf(screen,
+                                       PIPE_CAPF_MAX_POINT_WIDTH_AA));
    /* called after _mesa_create_context/_mesa_init_point, fix default user
     * settable max point size up
     */
@@ -130,17 +148,18 @@ void st_init_limits(struct st_context *st)
    c->MinPointSizeAA = 0.0f;
 
    c->MaxTextureMaxAnisotropy
-      = _maxf(2.0f, screen->get_paramf(screen, PIPE_CAP_MAX_TEXTURE_ANISOTROPY));
+      = _maxf(2.0f, screen->get_paramf(screen,
+                                 PIPE_CAPF_MAX_TEXTURE_ANISOTROPY));
 
    c->MaxTextureLodBias
-      = screen->get_paramf(screen, PIPE_CAP_MAX_TEXTURE_LOD_BIAS);
+      = screen->get_paramf(screen, PIPE_CAPF_MAX_TEXTURE_LOD_BIAS);
 
    c->MaxDrawBuffers
       = CLAMP(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
               1, MAX_DRAW_BUFFERS);
 
-   /* Quads always follow GL provoking rules. */
-   c->QuadsFollowProvokingVertexConvention = GL_FALSE;
+   c->QuadsFollowProvokingVertexConvention = screen->get_param(
+      screen, PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION);
 
    for (sh = 0; sh < MESA_SHADER_TYPES; ++sh) {
       struct gl_shader_compiler_options *options =
@@ -201,25 +220,37 @@ void st_init_limits(struct st_context *st)
 
       if (options->EmitNoLoops)
          options->MaxUnrollIterations = MIN2(screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS), 65536);
+      else
+         options->MaxUnrollIterations = 255; /* SM3 limit */
+      options->LowerClipDistance = true;
    }
 
-   /* PIPE_CAP_MAX_FS_INPUTS specifies the number of COLORn + GENERICn inputs
-    * and is set in MaxNativeAttribs. It's always 2 colors + N generic
-    * attributes. The GLSL compiler never uses COLORn for varyings, so we
-    * subtract the 2 colors to get the maximum number of varyings (generic
-    * attributes) supported by a driver. */
-   c->MaxVarying = screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT, PIPE_SHADER_CAP_MAX_INPUTS) - 2;
+   /* PIPE_SHADER_CAP_MAX_INPUTS for the FS specifies the maximum number
+    * of inputs. It's always 2 colors + N generic inputs. */
+   c->MaxVarying = screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
+                                            PIPE_SHADER_CAP_MAX_INPUTS);
    c->MaxVarying = MIN2(c->MaxVarying, MAX_VARYING);
 
-   /* XXX we'll need a better query here someday */
-   if (screen->get_param(screen, PIPE_CAP_GLSL)) {
-      c->MinProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MIN_TEXEL_OFFSET);
-      c->MaxProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MAX_TEXEL_OFFSET);
+   c->MinProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MIN_TEXEL_OFFSET);
+   c->MaxProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MAX_TEXEL_OFFSET);
 
-      c->GLSLVersion = 120;
-      _mesa_override_glsl_version(st->ctx);
-      c->UniformBooleanTrue = ~0;
-   }
+   c->UniformBooleanTrue = ~0;
+
+   c->MaxTransformFeedbackBuffers =
+      screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS);
+   c->MaxTransformFeedbackBuffers = MIN2(c->MaxTransformFeedbackBuffers, MAX_FEEDBACK_BUFFERS);
+   c->MaxTransformFeedbackSeparateComponents =
+      screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS);
+   c->MaxTransformFeedbackInterleavedComponents =
+      screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS);
+
+   c->StripTextureBorder = GL_TRUE;
+
+   c->GLSLSkipStrictMaxUniformLimitCheck =
+      screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS);
+
+   c->GLSLSkipStrictMaxVaryingLimitCheck =
+      screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_VARYINGS);
 }
 
 
@@ -231,6 +262,68 @@ static GLboolean st_get_s3tc_override(void)
    return GL_FALSE;
 }
 
+/**
+ * Given a member \c x of struct gl_extensions, return offset of
+ * \c x in bytes.
+ */
+#define o(x) offsetof(struct gl_extensions, x)
+
+
+struct st_extension_cap_mapping {
+   int extension_offset;
+   int cap;
+};
+
+struct st_extension_format_mapping {
+   int extension_offset[2];
+   enum pipe_format format[8];
+
+   /* If TRUE, at least one format must be supported for the extensions to be
+    * advertised. If FALSE, all the formats must be supported. */
+   GLboolean need_at_least_one;
+};
+
+/**
+ * Enable extensions if certain pipe formats are supported by the driver.
+ * What extensions will be enabled and what formats must be supported is
+ * described by the array of st_extension_format_mapping.
+ *
+ * target and bind_flags are passed to is_format_supported.
+ */
+static void init_format_extensions(struct st_context *st,
+                           const struct st_extension_format_mapping *mapping,
+                           unsigned num_mappings,
+                           enum pipe_texture_target target,
+                           unsigned bind_flags)
+{
+   struct pipe_screen *screen = st->pipe->screen;
+   GLboolean *extensions = (GLboolean *) &st->ctx->Extensions;
+   unsigned i;
+   int j;
+   int num_formats = Elements(mapping->format);
+   int num_ext = Elements(mapping->extension_offset);
+
+   for (i = 0; i < num_mappings; i++) {
+      int num_supported = 0;
+
+      /* Examine each format in the list. */
+      for (j = 0; j < num_formats && mapping[i].format[j]; j++) {
+         if (screen->is_format_supported(screen, mapping[i].format[j],
+                                         target, 0, bind_flags)) {
+            num_supported++;
+         }
+      }
+
+      if (!num_supported ||
+          (!mapping[i].need_at_least_one && num_supported != j)) {
+         continue;
+      }
+
+      /* Enable all extensions in the list. */
+      for (j = 0; j < num_ext && mapping[i].extension_offset[j]; j++)
+         extensions[mapping[i].extension_offset[j]] = GL_TRUE;
+   }
+}
 
 /**
  * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
@@ -243,31 +336,174 @@ void st_init_extensions(struct st_context *st)
 {
    struct pipe_screen *screen = st->pipe->screen;
    struct gl_context *ctx = st->ctx;
-   int i;
+   int i, glsl_feature_level;
+   GLboolean *extensions = (GLboolean *) &ctx->Extensions;
+
+   static const struct st_extension_cap_mapping cap_mapping[] = {
+      { o(ARB_base_instance),                PIPE_CAP_START_INSTANCE                   },
+      { o(ARB_depth_clamp),                  PIPE_CAP_DEPTH_CLIP_DISABLE               },
+      { o(ARB_depth_texture),                PIPE_CAP_TEXTURE_SHADOW_MAP               },
+      { o(ARB_draw_buffers_blend),           PIPE_CAP_INDEP_BLEND_FUNC                 },
+      { o(ARB_draw_instanced),               PIPE_CAP_TGSI_INSTANCEID                  },
+      { o(ARB_fragment_program_shadow),      PIPE_CAP_TEXTURE_SHADOW_MAP               },
+      { o(ARB_instanced_arrays),             PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR  },
+      { o(ARB_occlusion_query),              PIPE_CAP_OCCLUSION_QUERY                  },
+      { o(ARB_occlusion_query2),             PIPE_CAP_OCCLUSION_QUERY                  },
+      { o(ARB_point_sprite),                 PIPE_CAP_POINT_SPRITE                     },
+      { o(ARB_seamless_cube_map),            PIPE_CAP_SEAMLESS_CUBE_MAP                },
+      { o(ARB_shader_stencil_export),        PIPE_CAP_SHADER_STENCIL_EXPORT            },
+      { o(ARB_shader_texture_lod),           PIPE_CAP_SM3                              },
+      { o(ARB_shadow),                       PIPE_CAP_TEXTURE_SHADOW_MAP               },
+      { o(ARB_texture_non_power_of_two),     PIPE_CAP_NPOT_TEXTURES                    },
+      { o(ARB_transform_feedback2),          PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME       },
+      { o(ARB_transform_feedback3),          PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME       },
+
+      { o(EXT_blend_equation_separate),      PIPE_CAP_BLEND_EQUATION_SEPARATE          },
+      { o(EXT_draw_buffers2),                PIPE_CAP_INDEP_BLEND_ENABLE               },
+      { o(EXT_shadow_funcs),                 PIPE_CAP_TEXTURE_SHADOW_MAP               },
+      { o(EXT_stencil_two_side),             PIPE_CAP_TWO_SIDED_STENCIL                },
+      { o(EXT_texture_array),                PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS         },
+      { o(EXT_texture_filter_anisotropic),   PIPE_CAP_ANISOTROPIC_FILTER               },
+      { o(EXT_texture_mirror_clamp),         PIPE_CAP_TEXTURE_MIRROR_CLAMP             },
+      { o(EXT_texture_swizzle),              PIPE_CAP_TEXTURE_SWIZZLE                  },
+      { o(EXT_timer_query),                  PIPE_CAP_TIMER_QUERY                      },
+      { o(EXT_transform_feedback),           PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS        },
+
+      { o(AMD_seamless_cubemap_per_texture), PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE    },
+      { o(ATI_separate_stencil),             PIPE_CAP_TWO_SIDED_STENCIL                },
+      { o(ATI_texture_mirror_once),          PIPE_CAP_TEXTURE_MIRROR_CLAMP             },
+      { o(NV_conditional_render),            PIPE_CAP_CONDITIONAL_RENDER               },
+      { o(NV_texture_barrier),               PIPE_CAP_TEXTURE_BARRIER                  },
+      /* GL_NV_point_sprite is not supported by gallium because we don't
+       * support the GL_POINT_SPRITE_R_MODE_NV option. */
+      { o(MESA_texture_array),               PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS         },
+
+      { o(OES_standard_derivatives),         PIPE_CAP_SM3                              },
+      { o(ARB_texture_cube_map_array),       PIPE_CAP_CUBE_MAP_ARRAY                   }
+   };
+
+   /* Required: render target and sampler support */
+   static const struct st_extension_format_mapping rendertarget_mapping[] = {
+      { { o(ARB_texture_float) },
+        { PIPE_FORMAT_R32G32B32A32_FLOAT,
+          PIPE_FORMAT_R16G16B16A16_FLOAT } },
+
+      { { o(ARB_texture_rgb10_a2ui) },
+        { PIPE_FORMAT_B10G10R10A2_UINT } },
+
+      { { o(EXT_framebuffer_sRGB) },
+        { PIPE_FORMAT_A8B8G8R8_SRGB,
+          PIPE_FORMAT_B8G8R8A8_SRGB },
+         GL_TRUE }, /* at least one format must be supported */
+
+      { { o(EXT_packed_float) },
+        { PIPE_FORMAT_R11G11B10_FLOAT } },
+
+      { { o(EXT_texture_integer) },
+        { PIPE_FORMAT_R32G32B32A32_UINT,
+          PIPE_FORMAT_R32G32B32A32_SINT } },
+   };
+
+   /* Required: depth stencil and sampler support */
+   static const struct st_extension_format_mapping depthstencil_mapping[] = {
+      { { o(ARB_depth_buffer_float) },
+        { PIPE_FORMAT_Z32_FLOAT,
+          PIPE_FORMAT_Z32_FLOAT_S8X24_UINT } },
+
+      { { o(ARB_framebuffer_object),
+          o(EXT_packed_depth_stencil) },
+        { PIPE_FORMAT_S8_UINT_Z24_UNORM,
+          PIPE_FORMAT_Z24_UNORM_S8_UINT },
+        GL_TRUE }, /* at least one format must be supported */
+   };
+
+   /* Required: sampler support */
+   static const struct st_extension_format_mapping texture_mapping[] = {
+      { { o(ARB_texture_compression_rgtc) },
+        { PIPE_FORMAT_RGTC1_UNORM,
+          PIPE_FORMAT_RGTC1_SNORM,
+          PIPE_FORMAT_RGTC2_UNORM,
+          PIPE_FORMAT_RGTC2_SNORM } },
+
+      { { o(ARB_texture_rg) },
+        { PIPE_FORMAT_R8G8_UNORM } },
+
+      { { o(EXT_texture_compression_latc) },
+        { PIPE_FORMAT_LATC1_UNORM,
+          PIPE_FORMAT_LATC1_SNORM,
+          PIPE_FORMAT_LATC2_UNORM,
+          PIPE_FORMAT_LATC2_SNORM } },
+
+      { { o(EXT_texture_compression_s3tc),
+          o(S3_s3tc) },
+        { PIPE_FORMAT_DXT1_RGB,
+          PIPE_FORMAT_DXT1_RGBA,
+          PIPE_FORMAT_DXT3_RGBA,
+          PIPE_FORMAT_DXT5_RGBA } },
+
+      { { o(EXT_texture_shared_exponent) },
+        { PIPE_FORMAT_R9G9B9E5_FLOAT } },
+
+      { { o(EXT_texture_snorm) },
+        { PIPE_FORMAT_R8G8B8A8_SNORM } },
+
+      { { o(EXT_texture_sRGB),
+          o(EXT_texture_sRGB_decode) },
+        { PIPE_FORMAT_A8B8G8R8_SRGB,
+          PIPE_FORMAT_B8G8R8A8_SRGB },
+        GL_TRUE }, /* at least one format must be supported */
+
+      { { o(ATI_texture_compression_3dc) },
+        { PIPE_FORMAT_LATC2_UNORM } },
+
+      { { o(MESA_ycbcr_texture) },
+        { PIPE_FORMAT_UYVY,
+          PIPE_FORMAT_YUYV },
+        GL_TRUE }, /* at least one format must be supported */
+
+      { { o(OES_compressed_ETC1_RGB8_texture) },
+        { PIPE_FORMAT_ETC1_RGB8 } },
+   };
+
+   /* Required: vertex fetch support. */
+   static const struct st_extension_format_mapping vertex_mapping[] = {
+      { { o(ARB_vertex_type_2_10_10_10_rev) },
+        { PIPE_FORMAT_R10G10B10A2_UNORM,
+          PIPE_FORMAT_B10G10R10A2_UNORM,
+          PIPE_FORMAT_R10G10B10A2_SNORM,
+          PIPE_FORMAT_B10G10R10A2_SNORM,
+          PIPE_FORMAT_R10G10B10A2_USCALED,
+          PIPE_FORMAT_B10G10R10A2_USCALED,
+          PIPE_FORMAT_R10G10B10A2_SSCALED,
+          PIPE_FORMAT_B10G10R10A2_SSCALED } },
+   };
 
    /*
     * Extensions that are supported by all Gallium drivers:
     */
-   ctx->Extensions.ARB_copy_buffer = GL_TRUE;
+   ctx->Extensions.ARB_ES2_compatibility = GL_TRUE;
    ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
+   ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE;
    ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
    ctx->Extensions.ARB_fragment_program = GL_TRUE;
+   ctx->Extensions.ARB_fragment_shader = GL_TRUE;
    ctx->Extensions.ARB_half_float_pixel = GL_TRUE;
+   ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
    ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
-   ctx->Extensions.ARB_sampler_objects = GL_TRUE;
+   ctx->Extensions.ARB_shader_objects = GL_TRUE;
+   ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
    ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
    ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
    ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
    ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
    ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
-   ctx->Extensions.ARB_vertex_array_object = GL_TRUE;
+   ctx->Extensions.ARB_texture_storage = GL_TRUE;
    ctx->Extensions.ARB_vertex_program = GL_TRUE;
-   ctx->Extensions.ARB_window_pos = GL_TRUE;
+   ctx->Extensions.ARB_vertex_shader = GL_TRUE;
 
    ctx->Extensions.EXT_blend_color = GL_TRUE;
    ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
    ctx->Extensions.EXT_blend_minmax = GL_TRUE;
-   ctx->Extensions.EXT_blend_subtract = GL_TRUE;
    ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
    ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
    ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
@@ -277,360 +513,111 @@ void st_init_extensions(struct st_context *st)
    ctx->Extensions.EXT_point_parameters = GL_TRUE;
    ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
    ctx->Extensions.EXT_secondary_color = GL_TRUE;
+   ctx->Extensions.EXT_separate_shader_objects = GL_TRUE;
    ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
    ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
 
-   ctx->Extensions.APPLE_vertex_array_object = GL_TRUE;
-
    ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
 
    ctx->Extensions.MESA_pack_invert = GL_TRUE;
 
    ctx->Extensions.NV_blend_square = GL_TRUE;
-   ctx->Extensions.NV_texgen_reflection = GL_TRUE;
+   ctx->Extensions.NV_fog_distance = GL_TRUE;
    ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
    ctx->Extensions.NV_texture_rectangle = GL_TRUE;
-#if 0
-   /* possibly could support the following two */
-   ctx->Extensions.NV_vertex_program = GL_TRUE;
-   ctx->Extensions.NV_vertex_program1_1 = GL_TRUE;
-#endif
 
-#if FEATURE_OES_EGL_image
    ctx->Extensions.OES_EGL_image = GL_TRUE;
-#endif
-#if FEATURE_OES_draw_texture
+   if (ctx->API != API_OPENGL_COMPAT)
+      ctx->Extensions.OES_EGL_image_external = GL_TRUE;
    ctx->Extensions.OES_draw_texture = GL_TRUE;
-#endif
-
-   /*
-    * Extensions that depend on the driver/hardware:
-    */
-   if (screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS) > 0) {
-      ctx->Extensions.ARB_draw_buffers = GL_TRUE;
-   }
-
-   if (screen->get_param(screen, PIPE_CAP_TEXTURE_SWIZZLE) > 0) {
-      ctx->Extensions.EXT_texture_swizzle = GL_TRUE;
-   }
-
-   if (screen->get_param(screen, PIPE_CAP_GLSL)) {
-      ctx->Extensions.ARB_fragment_shader = GL_TRUE;
-      ctx->Extensions.ARB_vertex_shader = GL_TRUE;
-      ctx->Extensions.ARB_shader_objects = GL_TRUE;
-      ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
-      ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE;
-      ctx->Extensions.EXT_separate_shader_objects = GL_TRUE;
-   }
-
-   if (screen->get_param(screen, PIPE_CAP_TEXTURE_MIRROR_REPEAT) > 0) {
-      ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
-   }
-
-   if (screen->get_param(screen, PIPE_CAP_BLEND_EQUATION_SEPARATE)) {
-      ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
-   }
-
-   if (screen->get_param(screen, PIPE_CAP_TEXTURE_MIRROR_CLAMP) > 0) {
-      ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
-      ctx->Extensions.ATI_texture_mirror_once = GL_TRUE;
-   }
-
-   if (screen->get_param(screen, PIPE_CAP_NPOT_TEXTURES)) {
-      ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
-   }
-
-   if (screen->get_param(screen, PIPE_CAP_TWO_SIDED_STENCIL)) {
-      ctx->Extensions.ATI_separate_stencil = GL_TRUE;
-      ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
-   }
-
-   if (screen->get_param(screen, PIPE_CAP_ANISOTROPIC_FILTER)) {
-      ctx->Extensions.EXT_texture_filter_anisotropic = GL_TRUE;
-   }
-
-   if (screen->get_param(screen, PIPE_CAP_POINT_SPRITE)) {
-      ctx->Extensions.ARB_point_sprite = GL_TRUE;
-      /* GL_NV_point_sprite is not supported by gallium because we don't
-       * support the GL_POINT_SPRITE_R_MODE_NV option.
-       */
-   }
-
-   if (screen->get_param(screen, PIPE_CAP_OCCLUSION_QUERY)) {
-      ctx->Extensions.ARB_occlusion_query = GL_TRUE;
-      ctx->Extensions.ARB_occlusion_query2 = GL_TRUE;
-   }
-   if (screen->get_param(screen, PIPE_CAP_TIMER_QUERY)) {
-     ctx->Extensions.EXT_timer_query = GL_TRUE;
-   }
-
-   if (screen->get_param(screen, PIPE_CAP_TEXTURE_SHADOW_MAP)) {
-      ctx->Extensions.ARB_depth_texture = GL_TRUE;
-      ctx->Extensions.ARB_fragment_program_shadow = GL_TRUE;
-      ctx->Extensions.ARB_shadow = GL_TRUE;
-      ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
-      /*ctx->Extensions.ARB_shadow_ambient = GL_TRUE;*/
-   }
-
-   /* GL_EXT_packed_depth_stencil requires both the ability to render to
-    * a depth/stencil buffer and texture from depth/stencil source.
-    */
-   if (screen->is_format_supported(screen, PIPE_FORMAT_S8_USCALED_Z24_UNORM,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_DEPTH_STENCIL) &&
-       screen->is_format_supported(screen, PIPE_FORMAT_S8_USCALED_Z24_UNORM,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_SAMPLER_VIEW)) {
-      ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
-   }
-   else if (screen->is_format_supported(screen, PIPE_FORMAT_Z24_UNORM_S8_USCALED,
-                                        PIPE_TEXTURE_2D, 0,
-                                        PIPE_BIND_DEPTH_STENCIL) &&
-            screen->is_format_supported(screen, PIPE_FORMAT_Z24_UNORM_S8_USCALED,
-                                        PIPE_TEXTURE_2D, 0,
-                                        PIPE_BIND_SAMPLER_VIEW)) {
-      ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
-   }
 
-   /* float support - assume nothing exclusively supports 64-bit floats */
-   if (screen->is_format_supported(screen, PIPE_FORMAT_R32G32B32A32_FLOAT,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_SAMPLER_VIEW |
-                                   PIPE_BIND_RENDER_TARGET) &&
-      screen->is_format_supported(screen, PIPE_FORMAT_R16G16B16A16_FLOAT,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_SAMPLER_VIEW |
-                                   PIPE_BIND_RENDER_TARGET)) {
-      ctx->Extensions.ARB_texture_float = GL_TRUE;
-   }
-
-   /* sRGB support */
-   if (screen->is_format_supported(screen, PIPE_FORMAT_A8B8G8R8_SRGB,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_SAMPLER_VIEW) ||
-      screen->is_format_supported(screen, PIPE_FORMAT_B8G8R8A8_SRGB,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_SAMPLER_VIEW)) {
-      ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
-      ctx->Extensions.EXT_texture_sRGB_decode = GL_TRUE;
-      if (screen->is_format_supported(screen, PIPE_FORMAT_A8B8G8R8_SRGB,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_RENDER_TARGET) ||
-          screen->is_format_supported(screen, PIPE_FORMAT_B8G8R8A8_SRGB,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_RENDER_TARGET)) {
-         ctx->Extensions.EXT_framebuffer_sRGB = GL_TRUE;
-         ctx->Const.sRGBCapable = GL_TRUE;
+   /* Expose the extensions which directly correspond to gallium caps. */
+   for (i = 0; i < Elements(cap_mapping); i++) {
+      if (screen->get_param(screen, cap_mapping[i].cap)) {
+         extensions[cap_mapping[i].extension_offset] = GL_TRUE;
       }
    }
 
-   if (screen->is_format_supported(screen, PIPE_FORMAT_R8G8_UNORM,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_SAMPLER_VIEW)) {
-      ctx->Extensions.ARB_texture_rg = GL_TRUE;
-   }
-
-   /* s3tc support */
-   if (screen->is_format_supported(screen, PIPE_FORMAT_DXT5_RGBA,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_SAMPLER_VIEW) &&
-       (ctx->Mesa_DXTn || st_get_s3tc_override())) {
-      ctx->Extensions.EXT_texture_compression_s3tc = GL_TRUE;
-      ctx->Extensions.S3_s3tc = GL_TRUE;
-   }
-
-   if (screen->is_format_supported(screen, PIPE_FORMAT_RGTC1_UNORM,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_SAMPLER_VIEW) &&
-       screen->is_format_supported(screen, PIPE_FORMAT_RGTC1_SNORM,
-                                  PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_SAMPLER_VIEW) &&
-       screen->is_format_supported(screen, PIPE_FORMAT_RGTC2_UNORM,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_SAMPLER_VIEW) &&
-       screen->is_format_supported(screen, PIPE_FORMAT_RGTC2_SNORM,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_SAMPLER_VIEW)
-       ) {
-     ctx->Extensions.ARB_texture_compression_rgtc = GL_TRUE;
-   }
-
-   if (screen->is_format_supported(screen, PIPE_FORMAT_LATC1_UNORM,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_SAMPLER_VIEW) &&
-       screen->is_format_supported(screen, PIPE_FORMAT_LATC1_SNORM,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_SAMPLER_VIEW) &&
-       screen->is_format_supported(screen, PIPE_FORMAT_LATC2_UNORM,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_SAMPLER_VIEW) &&
-       screen->is_format_supported(screen, PIPE_FORMAT_LATC2_SNORM,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_SAMPLER_VIEW)) {
-      ctx->Extensions.EXT_texture_compression_latc = GL_TRUE;
-   }
-
-   if (screen->is_format_supported(screen, PIPE_FORMAT_LATC2_UNORM,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_SAMPLER_VIEW)) {
-      ctx->Extensions.ATI_texture_compression_3dc = GL_TRUE;
-   }
-
-   if (screen->is_format_supported(screen, PIPE_FORMAT_R8G8B8A8_SNORM,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_SAMPLER_VIEW)) {
-      ctx->Extensions.EXT_texture_snorm = GL_TRUE;
-   }
-
-   /* ycbcr support */
-   if (screen->is_format_supported(screen, PIPE_FORMAT_UYVY, 
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_SAMPLER_VIEW) ||
-       screen->is_format_supported(screen, PIPE_FORMAT_YUYV, 
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_SAMPLER_VIEW)) {
-      ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
-   }
-
-   /* GL_EXT_texture_array */
-   if (screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS) > 1) {
-      ctx->Extensions.EXT_texture_array = GL_TRUE;
-      ctx->Extensions.MESA_texture_array = GL_TRUE;
-   }
-
-   /* GL_ARB_framebuffer_object */
-   if (ctx->Extensions.EXT_packed_depth_stencil) {
-      /* we support always support GL_EXT_framebuffer_blit */
-      ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
-   }
-
-   if (st->pipe->render_condition) {
-      ctx->Extensions.NV_conditional_render = GL_TRUE;
-   }
-
-   if (screen->get_param(screen, PIPE_CAP_INDEP_BLEND_ENABLE)) {
-      ctx->Extensions.EXT_draw_buffers2 = GL_TRUE;
-   }
-
-   if (screen->get_param(screen, PIPE_CAP_INDEP_BLEND_FUNC)) {
-      ctx->Extensions.ARB_draw_buffers_blend = GL_TRUE;
-   }
-
-   /* GL_ARB_half_float_vertex */
-   if (screen->is_format_supported(screen, PIPE_FORMAT_R16G16B16A16_FLOAT,
-                                   PIPE_BUFFER, 0,
-                                   PIPE_BIND_VERTEX_BUFFER)) {
-      ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
+   /* Expose the extensions which directly correspond to gallium formats. */
+   init_format_extensions(st, rendertarget_mapping,
+                          Elements(rendertarget_mapping), PIPE_TEXTURE_2D,
+                          PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW);
+   init_format_extensions(st, depthstencil_mapping,
+                          Elements(depthstencil_mapping), PIPE_TEXTURE_2D,
+                          PIPE_BIND_DEPTH_STENCIL | PIPE_BIND_SAMPLER_VIEW);
+   init_format_extensions(st, texture_mapping, Elements(texture_mapping),
+                          PIPE_TEXTURE_2D, PIPE_BIND_SAMPLER_VIEW);
+   init_format_extensions(st, vertex_mapping, Elements(vertex_mapping),
+                          PIPE_BUFFER, PIPE_BIND_VERTEX_BUFFER);
+
+   /* Figure out GLSL support. */
+   glsl_feature_level = screen->get_param(screen, PIPE_CAP_GLSL_FEATURE_LEVEL);
+
+   if (glsl_feature_level >= 140) {
+      if (ctx->API == API_OPENGL_CORE)
+         ctx->Const.GLSLVersion = 140;
+      else
+         ctx->Const.GLSLVersion = 130;
+   } else if (glsl_feature_level >= 130) {
+      ctx->Const.GLSLVersion = 130;
+   } else {
+      ctx->Const.GLSLVersion = 120;
+   }
+
+   _mesa_override_glsl_version(st->ctx);
+
+   if (ctx->Const.GLSLVersion >= 130) {
+      ctx->Const.NativeIntegers = GL_TRUE;
+      ctx->Const.MaxClipPlanes = 8;
+
+      /* Extensions that only depend on GLSL 1.3. */
+      ctx->Extensions.ARB_conservative_depth = GL_TRUE;
+      ctx->Extensions.ARB_shader_bit_encoding = GL_TRUE;
+   } else {
+      /* Optional integer support for GLSL 1.2. */
+      if (screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
+                                   PIPE_SHADER_CAP_INTEGERS) &&
+          screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
+                                   PIPE_SHADER_CAP_INTEGERS)) {
+         ctx->Const.NativeIntegers = GL_TRUE;
+      }
    }
 
-   if (screen->is_format_supported(screen, PIPE_FORMAT_R32G32B32A32_FIXED,
-                                   PIPE_BUFFER, 0,
-                                   PIPE_BIND_VERTEX_BUFFER)) {
-      ctx->Extensions.ARB_ES2_compatibility = GL_TRUE;
-   }
+   /* Below are the cases which cannot be moved into tables easily. */
 
-   if (screen->is_format_supported(screen, PIPE_FORMAT_R10G10B10A2_UNORM,
-                                   PIPE_BUFFER, 0,
-                                   PIPE_BIND_VERTEX_BUFFER) &&
-       screen->is_format_supported(screen, PIPE_FORMAT_B10G10R10A2_UNORM,
-                                   PIPE_BUFFER, 0,
-                                   PIPE_BIND_VERTEX_BUFFER) &&
-       screen->is_format_supported(screen, PIPE_FORMAT_R10G10B10A2_SNORM,
-                                   PIPE_BUFFER, 0,
-                                   PIPE_BIND_VERTEX_BUFFER) &&
-       screen->is_format_supported(screen, PIPE_FORMAT_B10G10R10A2_SNORM,
-                                   PIPE_BUFFER, 0,
-                                   PIPE_BIND_VERTEX_BUFFER) &&
-       screen->is_format_supported(screen, PIPE_FORMAT_R10G10B10A2_USCALED,
-                                   PIPE_BUFFER, 0,
-                                   PIPE_BIND_VERTEX_BUFFER) &&
-       screen->is_format_supported(screen, PIPE_FORMAT_B10G10R10A2_USCALED,
-                                   PIPE_BUFFER, 0,
-                                   PIPE_BIND_VERTEX_BUFFER) &&
-       screen->is_format_supported(screen, PIPE_FORMAT_R10G10B10A2_SSCALED,
-                                   PIPE_BUFFER, 0,
-                                   PIPE_BIND_VERTEX_BUFFER) &&
-       screen->is_format_supported(screen, PIPE_FORMAT_B10G10R10A2_SSCALED,
-                                   PIPE_BUFFER, 0,
-                                   PIPE_BIND_VERTEX_BUFFER)) {
-      ctx->Extensions.ARB_vertex_type_2_10_10_10_rev = GL_TRUE;
+   if (!ctx->Mesa_DXTn && !st_get_s3tc_override()) {
+      ctx->Extensions.EXT_texture_compression_s3tc = GL_FALSE;
+      ctx->Extensions.S3_s3tc = GL_FALSE;
    }
 
-   if (screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY, PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
+   if (screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY,
+                                PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
 #if 0 /* XXX re-enable when GLSL compiler again supports geometry shaders */
       ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
 #endif
    }
 
-   if (screen->get_param(screen, PIPE_CAP_PRIMITIVE_RESTART)) {
-      ctx->Extensions.NV_primitive_restart = GL_TRUE;
+   ctx->Extensions.NV_primitive_restart = GL_TRUE;
+   if (!screen->get_param(screen, PIPE_CAP_PRIMITIVE_RESTART)) {
+      ctx->Const.PrimitiveRestartInSoftware = GL_TRUE;
    }
 
-   if (screen->get_param(screen, PIPE_CAP_DEPTH_CLAMP)) {
-      ctx->Extensions.ARB_depth_clamp = GL_TRUE;
-   }
-
-   /* This extension does not actually require support of floating point
-    * render targets, just clamping controls.
-    * Advertise this extension if either fragment color clamping is supported
-    * or no render targets having color values outside of the range [0, 1]
-    * are supported, in which case the fragment color clamping has no effect
-    * on rendering.
-    */
-   if (screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMP_CONTROL) ||
-       (!screen->is_format_supported(screen, PIPE_FORMAT_R8G8B8A8_SNORM,
-                                     PIPE_TEXTURE_2D, 0,
-                                     PIPE_BIND_RENDER_TARGET) &&
-        !screen->is_format_supported(screen, PIPE_FORMAT_R16G16B16A16_SNORM,
-                                     PIPE_TEXTURE_2D, 0,
-                                     PIPE_BIND_RENDER_TARGET) &&
-        !screen->is_format_supported(screen, PIPE_FORMAT_R16G16B16A16_FLOAT,
-                                     PIPE_TEXTURE_2D, 0,
-                                     PIPE_BIND_RENDER_TARGET) &&
-        !screen->is_format_supported(screen, PIPE_FORMAT_R32G32B32A32_FLOAT,
-                                     PIPE_TEXTURE_2D, 0,
-                                     PIPE_BIND_RENDER_TARGET) &&
-        !screen->is_format_supported(screen, PIPE_FORMAT_R11G11B10_FLOAT,
-                                     PIPE_TEXTURE_2D, 0,
-                                     PIPE_BIND_RENDER_TARGET) &&
-        !screen->is_format_supported(screen, PIPE_FORMAT_R9G9B9E5_FLOAT,
-                                     PIPE_TEXTURE_2D, 0,
-                                     PIPE_BIND_RENDER_TARGET))) {
+   if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
       ctx->Extensions.ARB_color_buffer_float = GL_TRUE;
-   }
 
-   if (screen->get_param(screen, PIPE_CAP_SHADER_STENCIL_EXPORT)) {
-      ctx->Extensions.ARB_shader_stencil_export = GL_TRUE;
-   }
+      if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
+         st->clamp_vert_color_in_shader = TRUE;
+      }
 
-   if (screen->get_param(screen, PIPE_CAP_TGSI_INSTANCEID)) {
-      ctx->Extensions.ARB_draw_instanced = GL_TRUE;
-   }
-   if (screen->get_param(screen, PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR)) {
-      ctx->Extensions.ARB_instanced_arrays = GL_TRUE;
+      if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
+         st->clamp_frag_color_in_shader = TRUE;
+      }
    }
 
    if (screen->fence_finish) {
       ctx->Extensions.ARB_sync = GL_TRUE;
    }
 
-   if (st->pipe->texture_barrier) {
-      ctx->Extensions.NV_texture_barrier = GL_TRUE;
-   }
-
-   if (screen->is_format_supported(screen, PIPE_FORMAT_R9G9B9E5_FLOAT,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_SAMPLER_VIEW)) {
-      ctx->Extensions.EXT_texture_shared_exponent = GL_TRUE;
-   }
-
-   if (screen->is_format_supported(screen, PIPE_FORMAT_R11G11B10_FLOAT,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_RENDER_TARGET |
-                                   PIPE_BIND_SAMPLER_VIEW)) {
-      ctx->Extensions.EXT_packed_float = GL_TRUE;
-   }
-
    /* Maximum sample count. */
    for (i = 16; i > 0; --i) {
       if (screen->is_format_supported(screen, PIPE_FORMAT_B8G8R8A8_UNORM,
@@ -641,26 +628,26 @@ void st_init_extensions(struct st_context *st)
       }
    }
 
-   if (screen->get_param(screen, PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE)) {
-      ctx->Extensions.ARB_seamless_cube_map = GL_TRUE;
-      ctx->Extensions.AMD_seamless_cubemap_per_texture = GL_TRUE;
-   }
-   else if (screen->get_param(screen, PIPE_CAP_SEAMLESS_CUBE_MAP)) {
-      ctx->Extensions.ARB_seamless_cube_map = GL_TRUE;
+   if (ctx->Const.MaxDualSourceDrawBuffers > 0)
+      ctx->Extensions.ARB_blend_func_extended = GL_TRUE;
+
+   if (screen->get_param(screen, PIPE_CAP_TIMER_QUERY) &&
+       screen->get_param(screen, PIPE_CAP_QUERY_TIMESTAMP)) {
+      ctx->Extensions.ARB_timer_query = GL_TRUE;
    }
 
-   if (screen->get_param(screen, PIPE_CAP_SM3)) {
-      ctx->Extensions.ARB_shader_texture_lod = GL_TRUE;
+   if (ctx->Extensions.ARB_transform_feedback2 &&
+       ctx->Extensions.ARB_draw_instanced) {
+      ctx->Extensions.ARB_transform_feedback_instanced = GL_TRUE;
    }
+   if (st->options.force_glsl_extensions_warn)
+          ctx->Const.ForceGLSLExtensionsWarn = 1;
 
-   if (screen->is_format_supported(screen, PIPE_FORMAT_Z32_FLOAT,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_DEPTH_STENCIL |
-                                   PIPE_BIND_SAMPLER_VIEW) &&
-       screen->is_format_supported(screen, PIPE_FORMAT_Z32_FLOAT_S8X24_USCALED,
-                                   PIPE_TEXTURE_2D, 0,
-                                   PIPE_BIND_DEPTH_STENCIL |
-                                   PIPE_BIND_SAMPLER_VIEW)) {
-      ctx->Extensions.ARB_depth_buffer_float = GL_TRUE;
+   ctx->Const.MinMapBufferAlignment =
+      screen->get_param(screen, PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT);
+   if (ctx->Const.MinMapBufferAlignment >= 64) {
+      ctx->Extensions.ARB_map_buffer_alignment = GL_TRUE;
    }
+   if (screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OBJECTS))
+      ctx->Extensions.ARB_texture_buffer_object = GL_TRUE;
 }