On Thu, Jun 06, 2013 at 04:41:30PM -0700, Sinclair Yeh wrote:
> v4:
> Incorporated krh and anderco's comments. Now adding newly allocated
> buffer's dimensions to texture_damage
>
> v3:
> * Removed unnecessary parentheses
> * Added check for switching from EGL image to SHM buffer
> * Moved shader assignment out of IF condition
>
> v2:
> Fixed the wrong comparison
>
> v1:
> Depending on specific DRI driver implementation, glTexImage2D() with data
> set to NULL may or may not re-allocate the texture buffer each time it is
> called. Unintended consequences happen if later glTexSubImage2D() is called
> to only update a sub-region of the texture buffer.
>
> I've explored moving glTexImage2D() from gl_renderer_attach() and simply
> mark the texture dirty, but the current implemention seems cleaner because
> I won't have to worry about calling ensure_textures() and re-assigning
> gs->shader unnecessarily.
Thanks, I think we got it now. The #1 issue I saw is still there, but
I've realized I only see it with gnome-terminal. I think it's an
issue in how it resizes and restricts its size to a integer number of
character cells - either way, I don't see it with other gtk+ apps or
the weston sample apps. Thanks for keeping this going - patch
committed and pushed.
Kristian
> ---
> src/gl-renderer.c | 31 +++++++++++++++++++++++--------
> 1 files changed, 23 insertions(+), 8 deletions(-)
>
> diff --git a/src/gl-renderer.c b/src/gl-renderer.c
> index d783a0b..63c9c32 100644
> --- a/src/gl-renderer.c
> +++ b/src/gl-renderer.c
> @@ -1204,15 +1204,30 @@ gl_renderer_attach(struct weston_surface *es, struct
> wl_buffer *buffer)
> }
>
> if (wl_buffer_is_shm(buffer)) {
> - gs->pitch = wl_shm_buffer_get_stride(buffer) / 4;
> - gs->height = wl_shm_buffer_get_height(buffer);
> - gs->target = GL_TEXTURE_2D;
> + /* Only allocate a texture if it doesn't match existing one.
> + * If gs->num_images is not 0, then a switch from DRM allocated
> + * buffer to a SHM buffer is happening, and we need to allocate
> + * a new texture buffer.
> + */
> + if (wl_shm_buffer_get_stride(buffer) / 4 != gs->pitch ||
> + wl_shm_buffer_get_height(buffer) != gs->height ||
> + gs->num_images > 0) {
> + gs->pitch = wl_shm_buffer_get_stride(buffer) / 4;
> + gs->height = wl_shm_buffer_get_height(buffer);
> + gs->target = GL_TEXTURE_2D;
> +
> + ensure_textures(gs, 1);
> + glBindTexture(GL_TEXTURE_2D, gs->textures[0]);
> + glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
> + gs->pitch, buffer->height, 0,
> + GL_BGRA_EXT, GL_UNSIGNED_BYTE, NULL);
> + pixman_region32_union_rect(&gs->texture_damage,
> + &gs->texture_damage,
> + 0, 0,
> + gs->pitch / es->buffer_scale,
> + gs->height /
> es->buffer_scale);
> + }
>
> - ensure_textures(gs, 1);
> - glBindTexture(GL_TEXTURE_2D, gs->textures[0]);
> - glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
> - gs->pitch, buffer->height, 0,
> - GL_BGRA_EXT, GL_UNSIGNED_BYTE, NULL);
> if (wl_shm_buffer_get_format(buffer) == WL_SHM_FORMAT_XRGB8888)
> gs->shader = &gr->texture_shader_rgbx;
> else
> --
> 1.7.7.6
>
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