mesa: new _mesa_error_check_format_and_type() function

This replaces the _mesa_is_legal_format_and_type() function.

According to the spec, some invalid format/type combinations to
glDrawPixels, ReadPixels and glTexImage should generate
GL_INVALID_ENUM but others should generate GL_INVALID_OPERATION.

With the old function we didn't make that distinction and generated
GL_INVALID_ENUM errors instead of GL_INVALID_OPERATION.  The new
function returns one of those errors or GL_NO_ERROR.

This will also let us remove some redundant format/type checks in
follow-on commit.

v2: add more checks for ARB_texture_rgb10_a2ui at the top of
_mesa_error_check_format_and_type() per Ian.

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

1 files changed, 7 insertions, 9 deletions

diff --git a/src/mesa/main/texgetimage.c b/src/mesa/main/texgetimage.c
index 42495c8..58fed11 100644
--- a/src/mesa/main/texgetimage.c
+++ b/src/mesa/main/texgetimage.c
@@ -734,7 +734,7 @@ getteximage_error_check(struct gl_context *ctx, GLenum target, GLint level,
    struct gl_texture_image *texImage;
    const GLint maxLevels = _mesa_max_texture_levels(ctx, target);
    const GLuint dimensions = (target == GL_TEXTURE_3D) ? 3 : 2;
-   GLenum baseFormat;
+   GLenum baseFormat, err;
 
    if (maxLevels == 0) {
       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(target=0x%x)", target);
@@ -777,6 +777,12 @@ getteximage_error_check(struct gl_context *ctx, GLenum target, GLint level,
    if (!ctx->Extensions.ATI_envmap_bumpmap
        && _mesa_is_dudv_format(format)) {
       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
+      return;
+   }
+
+   err = _mesa_error_check_format_and_type(ctx, format, type);
+   if (err != GL_NO_ERROR) {
+      _mesa_error(ctx, err, "glGetTexImage(format/type)");
       return GL_TRUE;
    }
 
@@ -787,14 +793,6 @@ getteximage_error_check(struct gl_context *ctx, GLenum target, GLint level,
       return GL_TRUE;
    }
 
-   if (!_mesa_is_legal_format_and_type(ctx, format, type)) {
-      /* GL_INVALID_OPERATION is generated by a format/type
-       * mismatch (see the 1.2 spec page 94, sec 3.6.4.)
-       */
-      _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(target)");
-      return GL_TRUE;
-   }
-
    texImage = _mesa_select_tex_image(ctx, texObj, target, level);
    if (!texImage) {
       /* non-existant texture image */