mesa: allow exposing GL3 without EXT_texture_integer

Strictly speaking, it's not legal to expose EXT_texture_integer without
EXT_gpu_shader4. It might be even dangerous (apps can assume EXT_gpu_shader4
is available without checking for it).

The check in compute_version is removed as well, because that's already
covered by GLSLVersion >= 130.

Reviewed-by: Brian Paul <brianp@vmware.com>

src/mesa/main/fbobject.c

@@ -1225,7 +1225,8 @@ _mesa_base_fbo_format(struct gl_context *ctx, GLenum internalFormat)
    case GL_RGBA8I_EXT:
    case GL_RGBA16I_EXT:
    case GL_RGBA32I_EXT:
-      return ctx->Extensions.EXT_texture_integer ? GL_RGBA : 0;
+      return ctx->VersionMajor >= 3 ||
+             ctx->Extensions.EXT_texture_integer ? GL_RGBA : 0;
 
    case GL_RGB8UI_EXT:
    case GL_RGB16UI_EXT:
@@ -1233,7 +1234,8 @@ _mesa_base_fbo_format(struct gl_context *ctx, GLenum internalFormat)
    case GL_RGB8I_EXT:
    case GL_RGB16I_EXT:
    case GL_RGB32I_EXT:
-      return ctx->Extensions.EXT_texture_integer ? GL_RGB : 0;
+      return ctx->VersionMajor >= 3 ||
+             ctx->Extensions.EXT_texture_integer ? GL_RGB : 0;
 
    case GL_R8UI:
    case GL_R8I:
@@ -1241,8 +1243,9 @@ _mesa_base_fbo_format(struct gl_context *ctx, GLenum internalFormat)
    case GL_R16I:
    case GL_R32UI:
    case GL_R32I:
-      return ctx->Extensions.ARB_texture_rg &&
+      return ctx->VersionMajor >= 3 ||
-             ctx->Extensions.EXT_texture_integer ? GL_RED : 0;
+             (ctx->Extensions.ARB_texture_rg &&
+              ctx->Extensions.EXT_texture_integer) ? GL_RED : 0;
 
    case GL_RG8UI:
    case GL_RG8I:
@@ -1250,8 +1253,9 @@ _mesa_base_fbo_format(struct gl_context *ctx, GLenum internalFormat)
    case GL_RG16I:
    case GL_RG32UI:
    case GL_RG32I:
-      return ctx->Extensions.ARB_texture_rg &&
+      return ctx->VersionMajor >= 3 ||
-             ctx->Extensions.EXT_texture_integer ? GL_RG : 0;
+             (ctx->Extensions.ARB_texture_rg &&
+              ctx->Extensions.EXT_texture_integer) ? GL_RG : 0;
 
    case GL_INTENSITY8I_EXT:
    case GL_INTENSITY8UI_EXT:

src/mesa/main/image.c

@@ -536,7 +536,8 @@ _mesa_is_legal_format_and_type(const struct gl_context *ctx,
             case GL_UNSIGNED_SHORT:
             case GL_INT:
             case GL_UNSIGNED_INT:
-               return ctx->Extensions.EXT_texture_integer;
+               return ctx->VersionMajor >= 3 ||
+                      ctx->Extensions.EXT_texture_integer;
             default:
                return GL_FALSE;
          }
@@ -549,7 +550,8 @@ _mesa_is_legal_format_and_type(const struct gl_context *ctx,
             case GL_UNSIGNED_SHORT:
             case GL_INT:
             case GL_UNSIGNED_INT:
-               return ctx->Extensions.EXT_texture_integer;
+               return ctx->VersionMajor >= 3 ||
+                      ctx->Extensions.EXT_texture_integer;
             case GL_UNSIGNED_BYTE_3_3_2:
             case GL_UNSIGNED_BYTE_2_3_3_REV:
             case GL_UNSIGNED_SHORT_5_6_5:
@@ -568,7 +570,8 @@ _mesa_is_legal_format_and_type(const struct gl_context *ctx,
             case GL_INT:
             case GL_UNSIGNED_INT:
             /* NOTE: no packed formats w/ BGR format */
-               return ctx->Extensions.EXT_texture_integer;
+               return ctx->VersionMajor >= 3 ||
+                      ctx->Extensions.EXT_texture_integer;
             default:
                return GL_FALSE;
          }
@@ -582,7 +585,8 @@ _mesa_is_legal_format_and_type(const struct gl_context *ctx,
             case GL_UNSIGNED_SHORT:
             case GL_INT:
             case GL_UNSIGNED_INT:
-               return ctx->Extensions.EXT_texture_integer;
+               return ctx->VersionMajor >= 3 ||
+                      ctx->Extensions.EXT_texture_integer;
             case GL_UNSIGNED_SHORT_4_4_4_4:
             case GL_UNSIGNED_SHORT_4_4_4_4_REV:
             case GL_UNSIGNED_SHORT_5_5_5_1:

src/mesa/main/texformat.c

@@ -706,6 +706,12 @@ _mesa_choose_tex_format( struct gl_context *ctx, GLint internalFormat,
          RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_INT32);
          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
          break;
+      }
+   }
+
+   if (ctx->VersionMajor >= 3 ||
+       ctx->Extensions.EXT_texture_integer) {
+      switch (internalFormat) {
       case GL_RGB8UI_EXT:
          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_UINT8);
          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
@@ -822,7 +828,9 @@ _mesa_choose_tex_format( struct gl_context *ctx, GLint internalFormat,
       }
    }
 
-   if (ctx->Extensions.ARB_texture_rg && ctx->Extensions.EXT_texture_integer) {
+   if (ctx->VersionMajor >= 3 ||
+       (ctx->Extensions.ARB_texture_rg &&
+        ctx->Extensions.EXT_texture_integer)) {
       switch (internalFormat) {
       case GL_R8UI:
          RETURN_IF_SUPPORTED(MESA_FORMAT_R_UINT8);

src/mesa/main/teximage.c

@@ -323,7 +323,8 @@ _mesa_base_tex_format( struct gl_context *ctx, GLint internalFormat )
    }
 #endif /* FEATURE_EXT_texture_sRGB */
 
-   if (ctx->Extensions.EXT_texture_integer) {
+   if (ctx->VersionMajor >= 3 ||
+       ctx->Extensions.EXT_texture_integer) {
       switch (internalFormat) {
       case GL_RGBA8UI_EXT:
       case GL_RGBA16UI_EXT:
@@ -340,6 +341,11 @@ _mesa_base_tex_format( struct gl_context *ctx, GLint internalFormat )
       case GL_RGB16I_EXT:
       case GL_RGB32I_EXT:
          return GL_RGB;
+      }
+   }
+
+   if (ctx->Extensions.EXT_texture_integer) {
+      switch (internalFormat) {
       case GL_ALPHA8UI_EXT:
       case GL_ALPHA16UI_EXT:
       case GL_ALPHA32UI_EXT:
@@ -391,7 +397,7 @@ _mesa_base_tex_format( struct gl_context *ctx, GLint internalFormat )
       case GL_R16UI:
       case GL_R32I:
       case GL_R32UI:
-	 if (!ctx->Extensions.EXT_texture_integer)
+	 if (ctx->VersionMajor < 3 && !ctx->Extensions.EXT_texture_integer)
 	    break;
 	 /* FALLTHROUGH */
       case GL_R8:
@@ -416,7 +422,7 @@ _mesa_base_tex_format( struct gl_context *ctx, GLint internalFormat )
       case GL_RG16UI:
       case GL_RG32I:
       case GL_RG32UI:
-	 if (!ctx->Extensions.EXT_texture_integer)
+	 if (ctx->VersionMajor < 3 && !ctx->Extensions.EXT_texture_integer)
 	    break;
 	 /* FALLTHROUGH */
       case GL_RG:
@@ -1680,7 +1686,7 @@ texture_error_check( struct gl_context *ctx,
    }
 
    /* additional checks for integer textures */
-   if (ctx->Extensions.EXT_texture_integer &&
+   if ((ctx->VersionMajor >= 3 || ctx->Extensions.EXT_texture_integer) &&
        (_mesa_is_integer_format(format) !=
         _mesa_is_integer_format(internalFormat))) {
       if (!isProxy) {

src/mesa/main/version.c

@@ -139,7 +139,6 @@ compute_version(struct gl_context *ctx)
                               ctx->Extensions.EXT_framebuffer_sRGB &&
                               ctx->Extensions.EXT_packed_float &&
                               ctx->Extensions.EXT_texture_array &&
-                              ctx->Extensions.EXT_texture_integer &&
                               ctx->Extensions.EXT_texture_shared_exponent &&
                               ctx->Extensions.EXT_transform_feedback &&
                               ctx->Extensions.NV_conditional_render);