mesa/st: take pixelmaps in to account in drawpixels cache

Otherwise we might use cache item with different mapping.

Cc: mesa-stable
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/12492
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33191>

src/mesa/state_tracker/st_cb_drawpixels.c

@@ -485,6 +485,10 @@ search_drawpixels_cache(struct st_context *st,
           entry->image) {
          assert(entry->texture);
 
+         if (memcmp(&entry->pixelmaps, &st->ctx->PixelMaps,
+             sizeof(struct gl_pixelmaps)) != 0)
+            continue;
+
          /* check if the pixel data is the same */
          if (memcmp(pixels, entry->image, width * height * bpp) == 0) {
             /* Success - found a cache match */
@@ -555,6 +559,8 @@ cache_drawpixels_image(struct st_context *st,
       entry->height = height;
       entry->format = format;
       entry->type = type;
+      memcpy(&entry->pixelmaps, &st->ctx->PixelMaps,
+             sizeof(struct gl_pixelmaps));
       entry->user_pointer = pixels;
       free(entry->image);
       entry->image = malloc(width * height * bpp);

src/mesa/state_tracker/st_context.h

@@ -93,6 +93,7 @@ struct drawpix_cache_entry
 {
    GLsizei width, height;
    GLenum format, type;
+   struct gl_pixelmaps pixelmaps;
    const void *user_pointer;  /**< Last user 'pixels' pointer */
    void *image;               /**< Copy of the glDrawPixels image data */
    struct pipe_resource *texture;