[Mesa-dev] [PATCH] mesa: queries of non-existent FBO attachments should return INVALID_OPERATION

[Marek Olšák]

OpenGL 4.0 Compatibility, page 449:

If the value of FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE is NONE, no
framebuffer is bound to target. In this case querying pname FRAMEBUFFER_-
ATTACHMENT_OBJECT_NAME will return zero, and all other queries will generate
an INVALID_OPERATION error.
---
 src/mesa/main/fbobject.c |   24 ++++++++++++++++++++++++
 1 files changed, 24 insertions(+), 0 deletions(-)

diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index 739d03e..5a9f4a9 100644
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -2161,6 +2161,10 @@ _mesa_GetFramebufferAttachmentParameterivEXT(GLenum 
target, GLenum attachment,
       if (att->Type == GL_TEXTURE) {
         *params = att->TextureLevel;
       }
+      else if (att->Type == GL_NONE) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetFramebufferAttachmentParameterivEXT(pname)");
+      }
       else {
         _mesa_error(ctx, GL_INVALID_ENUM,
                     "glGetFramebufferAttachmentParameterivEXT(pname)");
@@ -2175,6 +2179,10 @@ _mesa_GetFramebufferAttachmentParameterivEXT(GLenum 
target, GLenum attachment,
             *params = 0;
          }
       }
+      else if (att->Type == GL_NONE) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetFramebufferAttachmentParameterivEXT(pname)");
+      }
       else {
         _mesa_error(ctx, GL_INVALID_ENUM,
                     "glGetFramebufferAttachmentParameterivEXT(pname)");
@@ -2189,6 +2197,10 @@ _mesa_GetFramebufferAttachmentParameterivEXT(GLenum 
target, GLenum attachment,
             *params = 0;
          }
       }
+      else if (att->Type == GL_NONE) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetFramebufferAttachmentParameterivEXT(pname)");
+      }
       else {
         _mesa_error(ctx, GL_INVALID_ENUM,
                     "glGetFramebufferAttachmentParameterivEXT(pname)");
@@ -2199,6 +2211,10 @@ _mesa_GetFramebufferAttachmentParameterivEXT(GLenum 
target, GLenum attachment,
          _mesa_error(ctx, GL_INVALID_ENUM,
                      "glGetFramebufferAttachmentParameterivEXT(pname)");
       }
+      else if (att->Type == GL_NONE) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetFramebufferAttachmentParameterivEXT(pname)");
+      }
       else {
          if (ctx->Extensions.EXT_framebuffer_sRGB && ctx->Const.sRGBCapable) {
             *params = 
_mesa_get_format_color_encoding(att->Renderbuffer->Format);
@@ -2216,6 +2232,10 @@ _mesa_GetFramebufferAttachmentParameterivEXT(GLenum 
target, GLenum attachment,
                      "glGetFramebufferAttachmentParameterivEXT(pname)");
          return;
       }
+      else if (att->Type == GL_NONE) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetFramebufferAttachmentParameterivEXT(pname)");
+      }
       else {
          gl_format format = att->Renderbuffer->Format;
          if (format == MESA_FORMAT_CI8 || format == MESA_FORMAT_S8) {
@@ -2237,6 +2257,10 @@ _mesa_GetFramebufferAttachmentParameterivEXT(GLenum 
target, GLenum attachment,
          _mesa_error(ctx, GL_INVALID_ENUM,
                      "glGetFramebufferAttachmentParameterivEXT(pname)");
       }
+      else if (att->Type == GL_NONE) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetFramebufferAttachmentParameterivEXT(pname)");
+      }
       else if (att->Texture) {
          const struct gl_texture_image *texImage =
             _mesa_select_tex_image(ctx, att->Texture, att->Texture->Target,
-- 
1.7.4.1

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