[Mesa-dev] [PATCH 3/3] state_trackers/dri/sw: Implement texture_from_pixmap.

[Benjamin Franzke]

It looks like this should be converted to a new dri_drawable hook
(like allocate_textures),
so the the drisw specific bits would be in sw/drisw.c (the hook in
drm/dri2.c would just be a noop).
This is the way the other stuff in st/dri is implemented and
dri_drawable.c wouldnt need to be cloned.

2011/8/30 Stéphane Marchesin <marcheu at chromium.org>:
> Signed-off-by: Stuart Abercrombie <sabercrombie at chromium.org>
> Signed-off-by: Stéphane Marchesin <marcheu at chromium.org>
> ---
>  src/gallium/state_trackers/dri/sw/dri_drawable.c |   50 +++++++++++++++++++---
>  1 files changed, 43 insertions(+), 7 deletions(-)
>
> diff --git a/src/gallium/state_trackers/dri/sw/dri_drawable.c b/src/gallium/state_trackers/dri/sw/dri_drawable.c
> index 7b8de31..05c64b6 100644
> --- a/src/gallium/state_trackers/dri/sw/dri_drawable.c
> +++ b/src/gallium/state_trackers/dri/sw/dri_drawable.c
> @@ -37,7 +37,8 @@
>  #include "util/u_format.h"
>  #include "util/u_memory.h"
>  #include "util/u_inlines.h"
> -
> +
> +#include "state_tracker/st_context.h"
>
>  static boolean
>  dri_st_framebuffer_validate(struct st_framebuffer_iface *stfbi,
> @@ -195,14 +196,23 @@ dri_set_tex_buffer2(__DRIcontext *pDRICtx, GLint target,
>  {
>    struct dri_context *ctx = dri_context(pDRICtx);
>    struct dri_drawable *drawable = dri_drawable(dPriv);
> -   struct pipe_resource *pt;
> -
> +   struct pipe_resource *res;
> +   struct st_context *stctx = (struct st_context *)ctx->st;
> +   struct pipe_context *pipe = stctx->pipe;
> +   struct pipe_transfer *tex_xfer;
> +   char *map;
> +   __DRIscreen *sPriv = dPriv->driScreenPriv;
> +   int x, y, w, h, line, ximage_stride;
> +
> +   sPriv->swrast_loader->getDrawableInfo(dPriv, &x, &y, &w, &h, dPriv->loaderPrivate);
> +
>    dri_drawable_validate_att(drawable, ST_ATTACHMENT_FRONT_LEFT);
>
> -   pt = drawable->textures[ST_ATTACHMENT_FRONT_LEFT];
> +   /* Use the pipe resource associated with the X drawable */
> +   res = drawable->textures[ST_ATTACHMENT_FRONT_LEFT];
>
> -   if (pt) {
> -      enum pipe_format internal_format = pt->format;
> +   if (res) {
> +      enum pipe_format internal_format = res->format;
>
>       if (format == __DRI_TEXTURE_FORMAT_RGB)  {
>          /* only need to cover the formats recognized by dri_fill_st_visual */
> @@ -218,9 +228,35 @@ dri_set_tex_buffer2(__DRIcontext *pDRICtx, GLint target,
>          }
>       }
>
> +
> +      tex_xfer = pipe_get_transfer(pipe, res,
> +                                    0, 0,    // level, layer
> +                                    PIPE_TRANSFER_WRITE,
> +                                    x, y,
> +                                    w, h);
> +
> +
> +      map = pipe_transfer_map(pipe, tex_xfer);
> +
> +      /* Copy the Drawable content to the mapped texture buffer */
> +      sPriv->swrast_loader->getImage(dPriv, x, y, w, h, map,
> +                                  dPriv->loaderPrivate);
> +
> +      /* The pipe transfer has a pitch rounded up to the nearest 64 pixels.
> +         We assume 32 bit pixels. */
> +      ximage_stride = w * 4;
> +      for (line = h-1; line; --line) {
> +         memmove(&map[line * tex_xfer->stride], &map[line * ximage_stride], ximage_stride);
> +      }
> +
> +      pipe_transfer_unmap(pipe, tex_xfer);
> +
> +      pipe_transfer_destroy(pipe, tex_xfer);
> +
>       ctx->st->teximage(ctx->st,
>             (target == GL_TEXTURE_2D) ? ST_TEXTURE_2D : ST_TEXTURE_RECT,
> -            0, internal_format, pt, FALSE);
> +            0, internal_format, res, FALSE);
> +
>    }
>  }
>
> --
> 1.7.5.3.367.ga9930
>
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