xenocara/xserver/fb/fbtrap.c

/*
 * Copyright © 2004 Keith Packard
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the name of Keith Packard not be used in
 * advertising or publicity pertaining to distribution of the software without
 * specific, written prior permission.  Keith Packard makes no
 * representations about the suitability of this software for any purpose.  It
 * is provided "as is" without express or implied warranty.
 *
 * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif

#include "fb.h"

#include "picturestr.h"
#include "mipict.h"
#include "fbpict.h"
#include "damage.h"

void
fbAddTraps(PicturePtr pPicture,
           INT16 x_off, INT16 y_off, int ntrap, xTrap * traps)
{
    pixman_image_t *image;
    int dst_xoff, dst_yoff;

    if (!(image = image_from_pict(pPicture, FALSE, &dst_xoff, &dst_yoff)))
        return;

    pixman_add_traps(image, x_off + dst_xoff, y_off + dst_yoff,
                     ntrap, (pixman_trap_t *) traps);

    free_pixman_pict(pPicture, image);
}

void
fbRasterizeTrapezoid(PicturePtr pPicture,
                     xTrapezoid * trap, int x_off, int y_off)
{
    pixman_image_t *image;
    int dst_xoff, dst_yoff;

    if (!(image = image_from_pict(pPicture, FALSE, &dst_xoff, &dst_yoff)))
        return;

    pixman_rasterize_trapezoid(image, (pixman_trapezoid_t *) trap,
                               x_off + dst_xoff, y_off + dst_yoff);

    free_pixman_pict(pPicture, image);
}

void
fbAddTriangles(PicturePtr pPicture,
               INT16 x_off, INT16 y_off, int ntri, xTriangle * tris)
{
    pixman_image_t *image;
    int dst_xoff, dst_yoff;

    if (!(image = image_from_pict(pPicture, FALSE, &dst_xoff, &dst_yoff)))
        return;

    pixman_add_triangles(image,
                         dst_xoff + x_off, dst_yoff + y_off,
                         ntri, (pixman_triangle_t *) tris);

    free_pixman_pict(pPicture, image);
}

typedef void (*CompositeShapesFunc) (pixman_op_t op,
                                     pixman_image_t * src,
                                     pixman_image_t * dst,
                                     pixman_format_code_t mask_format,
                                     int x_src, int y_src,
                                     int x_dst, int y_dst,
                                     int n_shapes, const uint8_t * shapes);

static void
fbShapes(CompositeShapesFunc composite,
         pixman_op_t op,
         PicturePtr pSrc,
         PicturePtr pDst,
         PictFormatPtr maskFormat,
         int16_t xSrc,
         int16_t ySrc, int nshapes, int shape_size, const uint8_t * shapes)
{
    pixman_image_t *src, *dst;
    int src_xoff, src_yoff;
    int dst_xoff, dst_yoff;

    miCompositeSourceValidate(pSrc);

    src = image_from_pict(pSrc, FALSE, &src_xoff, &src_yoff);
    dst = image_from_pict(pDst, TRUE, &dst_xoff, &dst_yoff);

    if (src && dst) {
        pixman_format_code_t format;

        DamageRegionAppend(pDst->pDrawable, pDst->pCompositeClip);

        if (!maskFormat) {
            int i;

            if (pDst->polyEdge == PolyEdgeSharp)
                format = PIXMAN_a1;
            else
                format = PIXMAN_a8;

            for (i = 0; i < nshapes; ++i) {
                composite(op, src, dst, format,
                          xSrc + src_xoff,
                          ySrc + src_yoff,
                          dst_xoff, dst_yoff, 1, shapes + i * shape_size);
            }
        }
        else {
            switch (PICT_FORMAT_A(maskFormat->format)) {
            case 1:
                format = PIXMAN_a1;
                break;

            case 4:
                format = PIXMAN_a4;
                break;

            default:
            case 8:
                format = PIXMAN_a8;
                break;
            }

            composite(op, src, dst, format,
                      xSrc + src_xoff,
                      ySrc + src_yoff, dst_xoff, dst_yoff, nshapes, shapes);
        }

        DamageRegionProcessPending(pDst->pDrawable);
    }

    free_pixman_pict(pSrc, src);
    free_pixman_pict(pDst, dst);
}

void
fbTrapezoids(CARD8 op,
             PicturePtr pSrc,
             PicturePtr pDst,
             PictFormatPtr maskFormat,
             INT16 xSrc, INT16 ySrc, int ntrap, xTrapezoid * traps)
{
    xSrc -= (traps[0].left.p1.x >> 16);
    ySrc -= (traps[0].left.p1.y >> 16);

    fbShapes((CompositeShapesFunc) pixman_composite_trapezoids,
             op, pSrc, pDst, maskFormat,
             xSrc, ySrc, ntrap, sizeof(xTrapezoid), (const uint8_t *) traps);
}

void
fbTriangles(CARD8 op,
            PicturePtr pSrc,
            PicturePtr pDst,
            PictFormatPtr maskFormat,
            INT16 xSrc, INT16 ySrc, int ntris, xTriangle * tris)
{
    xSrc -= (tris[0].p1.x >> 16);
    ySrc -= (tris[0].p1.y >> 16);

    fbShapes((CompositeShapesFunc) pixman_composite_triangles,
             op, pSrc, pDst, maskFormat,
             xSrc, ySrc, ntris, sizeof(xTriangle), (const uint8_t *) tris);
}