Mesa (main): mesa: always call _mesa_update_pixel

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Module: Mesa
Branch: main
Commit: 1ee3fbd703752460248958f9b7e42a855023b274
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=1ee3fbd703752460248958f9b7e42a855023b274

Author: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer at amd.com>
Date:   Tue Nov  2 14:01:06 2021 +0100

mesa: always call _mesa_update_pixel

10c75ae4 moved handling of this state to the functions that
depend on ctx->_ImageTransferState.

So we can't depend on _NEW_PIXEL being set to call this function,
since it'll be always clear earlier by _mesa_update_state_locked.

Example sequence that would trigger the issue:
  glPixelTransferi(...)
  glClear(...)
  glTexSubImage2D(...) <-- won't use the new value set by
                           glPixelTransferi because glClear caused
                           _NEW_PIXEL to be cleared.

_NEW_PIXEL itself is kept because st_update_pixel_transfer depends
on it.

Fixes: 10c75ae4 ("mesa: move _mesa_update_pixel out of _mesa_update_state")
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/5273
Reviewed-by: Marek Olšák <marek.olsak at amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13596>

---

 src/mesa/main/drawpix.c  |  9 +++------
 src/mesa/main/readpix.c  |  3 +--
 src/mesa/main/teximage.c | 15 +++++----------
 3 files changed, 9 insertions(+), 18 deletions(-)

diff --git a/src/mesa/main/drawpix.c b/src/mesa/main/drawpix.c
index a6c48f2d2e4..9df1406e1e6 100644
--- a/src/mesa/main/drawpix.c
+++ b/src/mesa/main/drawpix.c
@@ -73,8 +73,7 @@ _mesa_DrawPixels( GLsizei width, GLsizei height,
     */
    _mesa_set_vp_override(ctx, GL_TRUE);
 
-   if (ctx->NewState & _NEW_PIXEL)
-      _mesa_update_pixel(ctx);
+   _mesa_update_pixel(ctx);
 
    if (ctx->NewState)
       _mesa_update_state(ctx);
@@ -245,8 +244,7 @@ _mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
     */
    _mesa_set_vp_override(ctx, GL_TRUE);
 
-   if (ctx->NewState & _NEW_PIXEL)
-      _mesa_update_pixel(ctx);
+   _mesa_update_pixel(ctx);
 
    if (ctx->NewState)
       _mesa_update_state(ctx);
@@ -334,8 +332,7 @@ _mesa_Bitmap( GLsizei width, GLsizei height,
       return;    /* do nothing */
    }
 
-   if (ctx->NewState & _NEW_PIXEL)
-      _mesa_update_pixel(ctx);
+   _mesa_update_pixel(ctx);
 
    if (ctx->NewState)
       _mesa_update_state(ctx);
diff --git a/src/mesa/main/readpix.c b/src/mesa/main/readpix.c
index 4852cc0b2b4..c9136ffb3a4 100644
--- a/src/mesa/main/readpix.c
+++ b/src/mesa/main/readpix.c
@@ -1056,8 +1056,7 @@ read_pixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format,
       return;
    }
 
-   if (ctx->NewState & _NEW_PIXEL)
-      _mesa_update_pixel(ctx);
+   _mesa_update_pixel(ctx);
 
    if (ctx->NewState)
       _mesa_update_state(ctx);
diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c
index 4254f106963..acf6ee651a2 100644
--- a/src/mesa/main/teximage.c
+++ b/src/mesa/main/teximage.c
@@ -3145,8 +3145,7 @@ teximage(struct gl_context *ctx, GLboolean compressed, GLuint dims,
          unpack = &unpack_no_border;
       }
 
-      if (ctx->NewState & _NEW_PIXEL)
-         _mesa_update_pixel(ctx);
+      _mesa_update_pixel(ctx);
 
       _mesa_lock_texture(ctx, texObj);
       {
@@ -3587,8 +3586,7 @@ texture_sub_image(struct gl_context *ctx, GLuint dims,
 {
    FLUSH_VERTICES(ctx, 0, 0);
 
-   if (ctx->NewState & _NEW_PIXEL)
-      _mesa_update_pixel(ctx);
+   _mesa_update_pixel(ctx);
 
    _mesa_lock_texture(ctx, texObj);
    {
@@ -4271,8 +4269,7 @@ copy_texture_sub_image_err(struct gl_context *ctx, GLuint dims,
                   _mesa_enum_to_string(target),
                   level, xoffset, yoffset, zoffset, x, y, width, height);
 
-   if (ctx->NewState & _NEW_PIXEL)
-      _mesa_update_pixel(ctx);
+   _mesa_update_pixel(ctx);
 
    if (ctx->NewState & NEW_COPY_TEX_STATE)
       _mesa_update_state(ctx);
@@ -4297,8 +4294,7 @@ copy_texture_sub_image_no_error(struct gl_context *ctx, GLuint dims,
 {
    FLUSH_VERTICES(ctx, 0, 0);
 
-   if (ctx->NewState & _NEW_PIXEL)
-      _mesa_update_pixel(ctx);
+   _mesa_update_pixel(ctx);
 
    if (ctx->NewState & NEW_COPY_TEX_STATE)
       _mesa_update_state(ctx);
@@ -4329,8 +4325,7 @@ copyteximage(struct gl_context *ctx, GLuint dims, struct gl_texture_object *texO
                   _mesa_enum_to_string(internalFormat),
                   x, y, width, height, border);
 
-   if (ctx->NewState & _NEW_PIXEL)
-      _mesa_update_pixel(ctx);
+   _mesa_update_pixel(ctx);
 
    if (ctx->NewState & NEW_COPY_TEX_STATE)
       _mesa_update_state(ctx);