mesa/main: do not allow ARB_depth_buffer_float enums before gles3

Floating-point depth buffers are only supported on OpenGL 3.0, OpenGL ES
3.0, or if ARB_depth_buffer_float is supported. Because we checked a
driver capability rather than using an extension-check helper, we ended
up incorrectly allowing this on OpenGL ES 1.x and 2.x.

Since this logic is repeated, let's make a helper for it.

Signed-off-by: Erik Faye-Lund <[email protected]>
Reviewed-by: Marek Olšák <[email protected]>

2 files changed, 9 insertions, 3 deletions

diff --git a/src/mesa/main/context.h b/src/mesa/main/context.h
index c51b3c17c0d..14f9a6b8987 100644
--- a/src/mesa/main/context.h
+++ b/src/mesa/main/context.h
@@ -349,6 +349,12 @@ _mesa_has_texture_rgb10_a2ui(const struct gl_context *ctx)
    return _mesa_has_ARB_texture_rgb10_a2ui(ctx) || _mesa_is_gles3(ctx);
 }
 
+static inline bool
+_mesa_has_float_depth_buffer(const struct gl_context *ctx)
+{
+   return _mesa_has_ARB_depth_buffer_float(ctx) || _mesa_is_gles3(ctx);
+}
+
 /**
  * Checks if the context supports geometry shaders.
  */
diff --git a/src/mesa/main/glformats.c b/src/mesa/main/glformats.c
index 76f1f9a28b7..a4b17a85b09 100644
--- a/src/mesa/main/glformats.c
+++ b/src/mesa/main/glformats.c
@@ -1849,7 +1849,7 @@ _mesa_error_check_format_and_type(const struct gl_context *ctx,
       return GL_NO_ERROR;
 
    case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
-      if (!ctx->Extensions.ARB_depth_buffer_float) {
+      if (!_mesa_has_float_depth_buffer(ctx)) {
          return GL_INVALID_ENUM;
       }
       if (format != GL_DEPTH_STENCIL) {
@@ -2048,7 +2048,7 @@ _mesa_error_check_format_and_type(const struct gl_context *ctx,
       case GL_DEPTH_STENCIL:
          if (type == GL_UNSIGNED_INT_24_8)
             return GL_NO_ERROR;
-         else if (ctx->Extensions.ARB_depth_buffer_float &&
+         else if (_mesa_has_float_depth_buffer(ctx) &&
              type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
             return GL_NO_ERROR;
          else
@@ -2607,7 +2607,7 @@ _mesa_base_tex_format(const struct gl_context *ctx, GLint internalFormat)
       }
    }
 
-   if (ctx->Extensions.ARB_depth_buffer_float) {
+   if (_mesa_has_float_depth_buffer(ctx)) {
       switch (internalFormat) {
       case GL_DEPTH_COMPONENT32F:
          return GL_DEPTH_COMPONENT;