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cso: add new cso_set_viewport_dims() helper

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To simplify some viewport setting code in the state tracker.

Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
This commit is contained in:
Brian Paul 2016-02-16 10:22:32 -07:00
parent f88c859cd3
commit f7af12ae85
2 changed files with 20 additions and 0 deletions
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18
src/gallium/auxiliary/cso_cache/cso_context.c
View file

@ -674,6 +674,24 @@ void cso_set_viewport(struct cso_context *ctx,
}
}
/**
* Setup viewport state for given width and height (position is always (0,0)).
* Invert the Y axis if 'invert' is true.
*/
void
cso_set_viewport_dims(struct cso_context *ctx,
float width, float height, boolean invert)
{
struct pipe_viewport_state vp;
vp.scale[0] = width * 0.5f;
vp.scale[1] = height * (invert ? -0.5f : 0.5f);
vp.scale[2] = 0.5f;
vp.translate[0] = 0.5f * width;
vp.translate[1] = 0.5f * height;
vp.translate[2] = 0.5f;
cso_set_viewport(ctx, &vp);
}
void cso_save_viewport(struct cso_context *ctx)
{
ctx->vp_saved = ctx->vp;

2
src/gallium/auxiliary/cso_cache/cso_context.h
View file

@ -163,6 +163,8 @@ void cso_restore_framebuffer(struct cso_context *cso);
void cso_set_viewport(struct cso_context *cso,
const struct pipe_viewport_state *vp);
void cso_set_viewport_dims(struct cso_context *ctx,
float width, float height, boolean invert);
void cso_save_viewport(struct cso_context *cso);
void cso_restore_viewport(struct cso_context *cso);