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gallium/u_blitter: implement X and Y texture flipping

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This commit is contained in:
Marek Olšák 2012-08-04 03:15:29 +02:00
parent 825b45366d
commit dc5e61d884
1 changed files with 26 additions and 11 deletions
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37
src/gallium/auxiliary/util/u_blitter.c
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@ -972,10 +972,26 @@ void util_blitter_clear_depth_custom(struct blitter_context *blitter,
}
static
boolean is_overlap(unsigned sx1, unsigned sx2, unsigned sy1, unsigned sy2,
unsigned dx1, unsigned dx2, unsigned dy1, unsigned dy2)
boolean is_overlap(unsigned dstx, unsigned dsty, unsigned dstz,
const struct pipe_box *srcbox)
{
return sx1 < dx2 && sx2 > dx1 && sy1 < dy2 && sy2 > dy1;
struct pipe_box src = *srcbox;
if (src.width < 0) {
src.x += src.width;
src.width = -src.width;
}
if (src.height < 0) {
src.y += src.height;
src.height = -src.height;
}
if (src.depth < 0) {
src.z += src.depth;
src.depth = -src.depth;
}
return src.x < dstx+src.width && src.x+src.width > dstx &&
src.y < dsty+src.height && src.y+src.height > dsty &&
src.z < dstz+src.depth && src.z+src.depth > dstz;
}
void util_blitter_default_dst_texture(struct pipe_surface *dst_templ,
@ -1117,8 +1133,8 @@ void util_blitter_copy_texture_view(struct blitter_context *blitter,
struct pipe_context *pipe = ctx->base.pipe;
struct pipe_framebuffer_state fb_state;
enum pipe_texture_target src_target = src->texture->target;
unsigned width = srcbox->width;
unsigned height = srcbox->height;
int abs_width = abs(srcbox->width);
int abs_height = abs(srcbox->height);
boolean blit_stencil, blit_depth;
const struct util_format_description *src_desc =
util_format_description(src->format);
@ -1138,8 +1154,7 @@ void util_blitter_copy_texture_view(struct blitter_context *blitter,
/* Sanity checks. */
if (dst->texture == src->texture &&
dst->u.tex.level == src->u.tex.first_level) {
assert(!is_overlap(srcbox->x, srcbox->x + width, srcbox->y, srcbox->y + height,
dstx, dstx + width, dsty, dsty + height));
assert(!is_overlap(dstx, dsty, 0, srcbox));
}
/* XXX should handle 3d regions */
assert(srcbox->depth == 1);
@ -1230,18 +1245,18 @@ void util_blitter_copy_texture_view(struct blitter_context *blitter,
*/
union pipe_color_union coord;
get_texcoords(src, src_width0, src_height0, srcbox->x, srcbox->y,
srcbox->x+width, srcbox->y+height, coord.f);
srcbox->x+srcbox->width, srcbox->y+srcbox->height, coord.f);
/* Draw. */
blitter->draw_rectangle(blitter, dstx, dsty, dstx+width, dsty+height, 0,
blitter->draw_rectangle(blitter, dstx, dsty, dstx+abs_width, dsty+abs_height, 0,
UTIL_BLITTER_ATTRIB_TEXCOORD, &coord);
} else {
/* Draw the quad with the generic codepath. */
blitter_set_texcoords(ctx, src, src_width0, src_height0, srcbox->z,
src_sample,
srcbox->x, srcbox->y,
srcbox->x + width, srcbox->y + height);
blitter_draw(ctx, dstx, dsty, dstx+width, dsty+height, 0);
srcbox->x + srcbox->width, srcbox->y + srcbox->height);
blitter_draw(ctx, dstx, dsty, dstx+abs_width, dsty+abs_height, 0);
}
blitter_restore_vertex_states(ctx);