rom/graphics/allocspritedataa.c

   1 /*
   2     Copyright © 1995-2010, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Graphics function AllocSpriteDataA()
   6     Lang: english
   7 */
   8
   9 #include <aros/debug.h>
  10 #include <proto/exec.h>
  11 #include <proto/graphics.h>
  12 #include <proto/utility.h>
  13 #include <aros/debug.h>
  14 #include <cybergraphx/cybergraphics.h>
  15 #include <graphics/sprite.h>
  16 #include <graphics/scale.h>
  17 #include <hidd/graphics.h>
  18 #include <utility/tagitem.h>
  19 #include <exec/exec.h>
  20 #include <proto/oop.h>
  21 #include <string.h>
  22 #include "gfxfuncsupport.h"
  23 #include "graphics_intern.h"
  24
  25 #if DEBUG
  26
  27 #define PRINT_PIXFMT(bitmap)                                            \
  28 if (IS_HIDD_BM(bitmap)) {\
  29     OOP_Object *pf;                                                     \
  30     IPTR stdpf;                                                         \
  31                                                                         \
  32     OOP_GetAttr(HIDD_BM_OBJ(bitmap), aHidd_BitMap_PixFmt, (IPTR *)&pf); \
  33     OOP_GetAttr(pf, aHidd_PixFmt_StdPixFmt, &stdpf);                    \
  34                                                                         \
  35     bug("[AllocSpriteData] Bitmap pixelformat: %lu\n", stdpf);          \
  36 }
  37
  38 #else
  39 #define PRINT_PIXFMT(bitmap)
  40 #endif
  41
  42 #if DEBUG > 1
  43
  44 #define PRINT_BITMAP(bitmap, xmax, ymax)                        \
  45 bug("[AllocSpriteData] Bitmap contents:\n");                    \
  46 {                                                               \
  47     OOP_Object *bm = OBTAIN_HIDD_BM(bitmap);                    \
  48     ULONG x, y;                                                 \
  49                                                                 \
  50     for (y = 0; y < ymax; y++) {                                \
  51         for (x = 0; x < xmax; x++) {                            \
  52             HIDDT_Pixel pix = HIDD_BM_GetPixel(bm, x, y);       \
  53                                                                 \
  54             bug("0x%08lX ", pix);                               \
  55         }                                                       \
  56         bug("\n");                                              \
  57     }                                                           \
  58     RELEASE_HIDD_BM(bm, bitmap);                                \
  59 }
  60
  61 #else
  62 #define PRINT_BITMAP(bitmap, xmax, ymax)
  63 #endif
  64
  65 /*****************************************************************************
  66
  67     NAME */
  68 #include <proto/graphics.h>
  69
  70         AROS_LH2(struct ExtSprite *, AllocSpriteDataA,
  71
  72 /*  SYNOPSIS */
  73         AROS_LHA(struct BitMap *, bitmap, A2),
  74         AROS_LHA(struct TagItem *, tagList, A1),
  75
  76 /*  LOCATION */
  77         struct GfxBase *, GfxBase, 170, Graphics)
  78
  79 /*  FUNCTION
  80
  81     INPUTS
  82         bitmap - pointer to a bitmap. This bitmap provides the source data
  83                  for the sprite image
  84         tags   - pointer to a taglist
  85
  86     TAGS
  87         SPRITEA_Width (ULONG)        - Width of the sprite. If bitmap is smaller it will
  88                                        be filled on the right side with transparent
  89                                        pixels. Defaults to 16.
  90         SPRITEA_XReplication (LONG)  -  0 - perform a 1 to 1 conversion
  91                                         1 - each pixel from the source is replicated twice
  92                                         2 - each pixel is replicated 4 times.
  93                                        -1 - skip every 2nc pixel in the source bitmap
  94                                        -2 - only include every fourth pixel from the source.
  95         SPRITEA_YReplication (LONG)  - like SPRITEA_YReplication, but for vertical direction.
  96         SPRITEA_OutputHeight (ULONG) - Output height of the sprite. Must be at least as high
  97                                        as the bitmap. Defaults to bitmap height.
  98         SPRITEA_Attach               - (Not implemented)
  99
 100     RESULT
 101         SpritePtr - pointer to a ExtSprite structure,
 102                     or NULL if there is a failure.
 103                     You should pass this pointer to FreeSpriteData()
 104                     when this sprite is not needed anymore.
 105
 106     NOTES
 107
 108     EXAMPLE
 109
 110     BUGS
 111
 112     SEE ALSO
 113
 114     INTERNALS
 115
 116     HISTORY
 117
 118
 119 ******************************************************************************/
 120 {
 121     AROS_LIBFUNC_INIT
 122
 123     struct ExtSprite *sprite = NULL;
 124
 125     D(bug("AllocSpriteDataA(0x%08lX)\n", bitmap));
 126     if (NULL != bitmap) {
 127 #define SCALE_NORMAL  16
 128         BOOL have_OutputHeight = FALSE;
 129         BOOL have_OldDataFormat = FALSE;
 130         ULONG height = 0;
 131         ULONG width = 16;
 132         struct TagItem * tag, * tstate = tagList;
 133         struct BitMap *friend_bm = NULL;
 134         ULONG pixfmt = BMF_SPECIALFMT|SHIFT_PIXFMT(PIXFMT_LUT8);
 135         struct BitMap old_bitmap;
 136         UWORD *planes = NULL;
 137         ULONG planes_size = 0;
 138         struct BitScaleArgs bsa;
 139         LONG xrep = 0, yrep = 0;
 140
 141         memset(&bsa, 0, sizeof(bsa));
 142
 143         while (NULL != (tag = NextTagItem(&tstate))) {
 144             switch (tag->ti_Tag) {
 145                 case SPRITEA_Width:
 146                         width = tag->ti_Data;
 147                 break;
 148
 149                 case SPRITEA_XReplication:
 150                         xrep = tag->ti_Data;
 151                 break;
 152
 153                 case SPRITEA_YReplication:
 154                         yrep = tag->ti_Data;
 155                 break;
 156
 157                 case SPRITEA_OutputHeight:
 158                     height = tag->ti_Data;
 159                     have_OutputHeight = TRUE;
 160                 break;
 161
 162                 /* Currently we don't support this */
 163                 case SPRITEA_Attached:
 164                     return 0;
 165
 166                 case SPRITEA_OldDataFormat:
 167                     have_OldDataFormat = TRUE;
 168             }
 169         }
 170
 171         if (have_OldDataFormat) {
 172             /* A zero-width/height sprite is evidently legal on AOS */
 173             UWORD height2 = height == 0 ? 1 : height;
 174             UWORD *p, *q, *s = (UWORD *)bitmap + 2;
 175             UWORD k, mask;
 176
 177             InitBitMap(&old_bitmap, 2, 16, height2);
 178             planes_size = height2 * sizeof(UWORD) * 2;
 179             planes = AllocMem(planes_size, MEMF_CLEAR | MEMF_CHIP);
 180             if (!planes)
 181                 return NULL;
 182             p = planes;
 183             q = &planes[height2];
 184             mask = ~((1 << (16 - width)) - 1);
 185             old_bitmap.Planes[0] = (PLANEPTR)p;
 186             old_bitmap.Planes[1] = (PLANEPTR)q;
 187             for (k = 0; k < height; ++k) {
 188                 *p++ = AROS_WORD2BE(*s++ & mask);
 189                 *q++ = AROS_WORD2BE(*s++ & mask);
 190             }
 191             height = height2;
 192             width = 16;
 193             bsa.bsa_SrcBitMap = &old_bitmap;
 194             bsa.bsa_SrcWidth = width;
 195             bsa.bsa_SrcHeight = height;
 196         } else {
 197             bsa.bsa_SrcBitMap   = bitmap;
 198             bsa.bsa_SrcWidth  = GetBitMapAttr(bitmap, BMA_WIDTH);
 199             bsa.bsa_SrcHeight = GetBitMapAttr(bitmap, BMA_HEIGHT);
 200             if (have_OutputHeight) {
 201                 if (height > bsa.bsa_SrcHeight)
 202                     return NULL;
 203             } else
 204                 height = bsa.bsa_SrcHeight;
 205
 206             /* This is a part of experimental truecolor pointer support.
 207
 208                Check if the source bitmap is a HIDD bitmap. If so, we do
 209                not specify pixelformat and take if from original bitmap
 210                instead.
 211                In fact the whole trick is a temporary hack. Old display
 212                drivers will fail to set or display pointer sprite if
 213                the supplied bitmap is not in LUT8 format. This is wrong
 214                by itself and needs to be fixed. */
 215             if (IS_HIDD_BM(bitmap)) {
 216                 friend_bm = bitmap;
 217                 pixfmt = 0;
 218             }
 219         }
 220
 221         D(bug("[AllocSpriteData] Source bitmap depth: %u\n", GetBitMapAttr(bsa.bsa_SrcBitMap, BMA_DEPTH)));
 222         PRINT_PIXFMT(bsa.bsa_SrcBitMap);
 223         PRINT_BITMAP(bsa.bsa_SrcBitMap, 8, 8);
 224
 225         sprite = AllocVec(sizeof(*sprite), MEMF_PUBLIC | MEMF_CLEAR);
 226         if (NULL != sprite) {
 227
 228             D(bug("Source width %u Source height %u Sprite width %u Sprite height %u XReplication %u YReplication %u\n", bsa.bsa_SrcWidth, bsa.bsa_SrcHeight, width, height, xrep, yrep));
 229             if (xrep > 0) {
 230                 bsa.bsa_XDestFactor = SCALE_NORMAL << xrep;
 231             } else {
 232                 bsa.bsa_XDestFactor = SCALE_NORMAL >> (-xrep);
 233             }
 234
 235             if (yrep > 0) {
 236                 bsa.bsa_YDestFactor = SCALE_NORMAL << yrep;
 237             } else {
 238                 bsa.bsa_YDestFactor = SCALE_NORMAL >> (-yrep);
 239             }
 240
 241             bsa.bsa_XSrcFactor  = SCALE_NORMAL;
 242             bsa.bsa_YSrcFactor  = SCALE_NORMAL;
 243             /* Graphics drivers expect mouse pointer bitmap in LUT8 format, so we give it */
 244             bsa.bsa_DestBitMap  = AllocBitMap(width, height, 8, BMF_CLEAR|pixfmt, friend_bm);
 245             if (bsa.bsa_DestBitMap) {
 246                 BitMapScale(&bsa);
 247
 248                 sprite->es_SimpleSprite.height = height;
 249                 sprite->es_SimpleSprite.x      = 0;
 250                 sprite->es_SimpleSprite.y      = 0;
 251                 sprite->es_SimpleSprite.num    = 0;
 252                 sprite->es_wordwidth           = width >> 4;
 253                 sprite->es_flags               = 0;
 254                 sprite->es_BitMap              = bsa.bsa_DestBitMap;
 255
 256                 D(bug("[AllocSpriteData] Allocated sprite data 0x%08lX: bitmap 0x%08lX, height %u\n", sprite, sprite->es_BitMap, sprite->es_SimpleSprite.height));
 257                 D(bug("[AllocSpriteData] Bitmap depth: %u\n", GetBitMapAttr(bsa.bsa_DestBitMap, BMA_DEPTH)));
 258                 PRINT_PIXFMT(bsa.bsa_DestBitMap);
 259                 PRINT_BITMAP(bsa.bsa_DestBitMap, 8, 8);
 260             } else {
 261                 FreeVec(sprite);
 262                 sprite = NULL;
 263             }
 264         }
 265         if (have_OldDataFormat && planes_size)
 266             FreeMem(planes, planes_size);
 267     }
 268     return sprite;
 269
 270     AROS_LIBFUNC_EXIT
 271 } /* AllocSpriteDataA */