glamor/glamor_trapezoid.c

   1 /*
   2  * Copyright © 2009 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *    Junyan He <junyan.he@linux.intel.com>
  25  *
  26  */
  27
  28 /** @file glamor_trapezoid.c
  29  *
  30  * Trapezoid acceleration implementation
  31  */
  32
  33 #include "glamor_priv.h"
  34
  35 #include "mipict.h"
  36 #include "fbpict.h"
  37
  38 /**
  39  * Creates an appropriate picture for temp mask use.
  40  */
  41 static PicturePtr
  42 glamor_create_mask_picture(ScreenPtr screen,
  43                            PicturePtr dst,
  44                            PictFormatPtr pict_format,
  45                            CARD16 width, CARD16 height)
  46 {
  47     PixmapPtr pixmap;
  48     PicturePtr picture;
  49     int error;
  50
  51     if (!pict_format) {
  52         if (dst->polyEdge == PolyEdgeSharp)
  53             pict_format = PictureMatchFormat(screen, 1, PICT_a1);
  54         else
  55             pict_format = PictureMatchFormat(screen, 8, PICT_a8);
  56         if (!pict_format)
  57             return 0;
  58     }
  59
  60     pixmap = glamor_create_pixmap(screen, 0, 0,
  61                                   pict_format->depth,
  62                                   GLAMOR_CREATE_PIXMAP_CPU);
  63
  64     if (!pixmap)
  65         return 0;
  66     picture = CreatePicture(0, &pixmap->drawable, pict_format,
  67                             0, 0, serverClient, &error);
  68     glamor_destroy_pixmap(pixmap);
  69     return picture;
  70 }
  71
  72 /**
  73  * glamor_trapezoids will generate trapezoid mask accumulating in
  74  * system memory.
  75  */
  76 void
  77 glamor_trapezoids(CARD8 op,
  78                   PicturePtr src, PicturePtr dst,
  79                   PictFormatPtr mask_format, INT16 x_src, INT16 y_src,
  80                   int ntrap, xTrapezoid *traps)
  81 {
  82     ScreenPtr screen = dst->pDrawable->pScreen;
  83     BoxRec bounds;
  84     PicturePtr picture;
  85     INT16 x_dst, y_dst;
  86     INT16 x_rel, y_rel;
  87     int width, height, stride;
  88     PixmapPtr pixmap;
  89     pixman_image_t *image = NULL;
  90
  91     /* If a mask format wasn't provided, we get to choose, but behavior should
  92      * be as if there was no temporary mask the traps were accumulated into.
  93      */
  94     if (!mask_format) {
  95         if (dst->polyEdge == PolyEdgeSharp)
  96             mask_format = PictureMatchFormat(screen, 1, PICT_a1);
  97         else
  98             mask_format = PictureMatchFormat(screen, 8, PICT_a8);
  99         for (; ntrap; ntrap--, traps++)
 100             glamor_trapezoids(op, src, dst, mask_format, x_src,
 101                               y_src, 1, traps);
 102         return;
 103     }
 104
 105     miTrapezoidBounds(ntrap, traps, &bounds);
 106
 107     if (bounds.y1 >= bounds.y2 || bounds.x1 >= bounds.x2)
 108         return;
 109
 110     x_dst = traps[0].left.p1.x >> 16;
 111     y_dst = traps[0].left.p1.y >> 16;
 112
 113     width = bounds.x2 - bounds.x1;
 114     height = bounds.y2 - bounds.y1;
 115     stride = PixmapBytePad(width, mask_format->depth);
 116
 117     picture = glamor_create_mask_picture(screen, dst, mask_format,
 118                                          width, height);
 119     if (!picture)
 120         return;
 121
 122     image = pixman_image_create_bits(picture->format,
 123                                      width, height, NULL, stride);
 124     if (!image) {
 125         FreePicture(picture, 0);
 126         return;
 127     }
 128
 129     for (; ntrap; ntrap--, traps++)
 130         pixman_rasterize_trapezoid(image,
 131                                    (pixman_trapezoid_t *) traps,
 132                                    -bounds.x1, -bounds.y1);
 133
 134     pixmap = glamor_get_drawable_pixmap(picture->pDrawable);
 135
 136     screen->ModifyPixmapHeader(pixmap, width, height,
 137                                mask_format->depth,
 138                                BitsPerPixel(mask_format->depth),
 139                                PixmapBytePad(width,
 140                                              mask_format->depth),
 141                                pixman_image_get_data(image));
 142
 143     x_rel = bounds.x1 + x_src - x_dst;
 144     y_rel = bounds.y1 + y_src - y_dst;
 145
 146     CompositePicture(op, src, picture, dst,
 147                      x_rel, y_rel,
 148                      0, 0,
 149                      bounds.x1, bounds.y1,
 150                      bounds.x2 - bounds.x1, bounds.y2 - bounds.y1);
 151
 152     if (image)
 153         pixman_image_unref(image);
 154
 155     FreePicture(picture, 0);
 156 }