src/mesa/drivers/dri/i965/intel_pixel_bitmap.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portionsalloc
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "glheader.h"
  29 #include "enums.h"
  30 #include "image.h"
  31 #include "colormac.h"
  32 #include "mtypes.h"
  33 #include "macros.h"
  34 #include "bufferobj.h"
  35 #include "swrast/swrast.h"
  36
  37 #include "intel_screen.h"
  38 #include "intel_context.h"
  39 #include "intel_ioctl.h"
  40 #include "intel_batchbuffer.h"
  41 #include "intel_blit.h"
  42 #include "intel_regions.h"
  43 #include "intel_buffer_objects.h"
  44
  45
  46
  47 #define FILE_DEBUG_FLAG DEBUG_PIXEL
  48
  49
  50 /* Unlike the other intel_pixel_* functions, the expectation here is
  51  * that the incoming data is not in a PBO.  With the XY_TEXT blit
  52  * method, there's no benefit haveing it in a PBO, but we could
  53  * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit
  54  * PBO bitmaps.  I think they are probably pretty rare though - I
  55  * wonder if Xgl uses them?
  56  */
  57 static const GLubyte *map_pbo( GLcontext *ctx,
  58                                GLsizei width, GLsizei height,
  59                                const struct gl_pixelstore_attrib *unpack,
  60                                const GLubyte *bitmap )
  61 {
  62    GLubyte *buf;
  63
  64    if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
  65                                   GL_COLOR_INDEX, GL_BITMAP,
  66                                   (GLvoid *) bitmap)) {
  67       _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");
  68       return NULL;
  69    }
  70
  71    buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
  72                                            GL_READ_ONLY_ARB,
  73                                            unpack->BufferObj);
  74    if (!buf) {
  75       _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
  76       return NULL;
  77    }
  78
  79    return ADD_POINTERS(buf, bitmap);
  80 }
  81
  82 static GLboolean test_bit( const GLubyte *src,
  83                             GLuint bit )
  84 {
  85    return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0;
  86 }
  87
  88 static void set_bit( GLubyte *dest,
  89                           GLuint bit )
  90 {
  91    dest[bit/8] |= 1 << (bit % 8);
  92 }
  93
  94 /* Extract a rectangle's worth of data from the bitmap.  Called
  95  * per-cliprect.
  96  */
  97 static GLuint get_bitmap_rect(GLsizei width, GLsizei height,
  98                               const struct gl_pixelstore_attrib *unpack,
  99                               const GLubyte *bitmap,
 100                               GLuint x, GLuint y,
 101                               GLuint w, GLuint h,
 102                               GLubyte *dest,
 103                               GLuint row_align,
 104                               GLboolean invert)
 105 {
 106    GLuint src_offset = (x + unpack->SkipPixels) & 0x7;
 107    GLuint mask = unpack->LsbFirst ? 0 : 7;
 108    GLuint bit = 0;
 109    GLint row, col;
 110    GLint first, last;
 111    GLint incr;
 112    GLuint count = 0;
 113
 114    if (INTEL_DEBUG & DEBUG_PIXEL)
 115       _mesa_printf("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n",
 116                    __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask);
 117
 118    if (invert) {
 119       first = h-1;
 120       last = 0;
 121       incr = -1;
 122    }
 123    else {
 124       first = 0;
 125       last = h-1;
 126       incr = 1;
 127    }
 128
 129    /* Require that dest be pre-zero'd.
 130     */
 131    for (row = first; row != (last+incr); row += incr) {
 132       const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap,
 133                                                     width, height,
 134                                                     GL_COLOR_INDEX, GL_BITMAP,
 135                                                     y + row, x);
 136
 137       for (col = 0; col < w; col++, bit++) {
 138          if (test_bit(rowsrc, (col + src_offset) ^ mask)) {
 139             set_bit(dest, bit ^ 7);
 140             count++;
 141          }
 142       }
 143
 144       if (row_align)
 145          bit = ALIGN(bit, row_align);
 146    }
 147
 148    return count;
 149 }
 150
 151
 152
 153
 154 /*
 155  * Render a bitmap.
 156  */
 157 static GLboolean
 158 do_blit_bitmap( GLcontext *ctx,
 159                 GLint dstx, GLint dsty,
 160                 GLsizei width, GLsizei height,
 161                 const struct gl_pixelstore_attrib *unpack,
 162                 const GLubyte *bitmap )
 163 {
 164    struct intel_context *intel = intel_context(ctx);
 165    struct intel_region *dst = intel_drawbuf_region(intel);
 166    GLfloat tmpColor[4];
 167
 168    union {
 169       GLuint ui;
 170       GLubyte ub[4];
 171    } color;
 172
 173    if (!dst)
 174        return GL_FALSE;
 175
 176    if (unpack->BufferObj->Name) {
 177       bitmap = map_pbo(ctx, width, height, unpack, bitmap);
 178       if (bitmap == NULL)
 179          return GL_TRUE;        /* even though this is an error, we're done */
 180    }
 181
 182    COPY_4V(tmpColor, ctx->Current.RasterColor);
 183
 184    if (NEED_SECONDARY_COLOR(ctx)) {
 185        ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor);
 186    }
 187
 188    UNCLAMPED_FLOAT_TO_CHAN(color.ub[0], tmpColor[2]);
 189    UNCLAMPED_FLOAT_TO_CHAN(color.ub[1], tmpColor[1]);
 190    UNCLAMPED_FLOAT_TO_CHAN(color.ub[2], tmpColor[0]);
 191    UNCLAMPED_FLOAT_TO_CHAN(color.ub[3], tmpColor[3]);
 192
 193    /* Does zoom apply to bitmaps?
 194     */
 195    if (!intel_check_blit_fragment_ops(ctx) ||
 196        ctx->Pixel.ZoomX != 1.0F ||
 197        ctx->Pixel.ZoomY != 1.0F)
 198       return GL_FALSE;
 199
 200    LOCK_HARDWARE(intel);
 201
 202    if (intel->driDrawable->numClipRects) {
 203       __DRIdrawablePrivate *dPriv = intel->driDrawable;
 204       drm_clip_rect_t *box = dPriv->pClipRects;
 205       drm_clip_rect_t dest_rect;
 206       GLint nbox = dPriv->numClipRects;
 207       GLint srcx = 0, srcy = 0;
 208       GLint orig_screen_x1, orig_screen_y2;
 209       GLuint i;
 210
 211
 212       orig_screen_x1 = dPriv->x + dstx;
 213       orig_screen_y2 = dPriv->y + (dPriv->h - dsty);
 214
 215       /* Do scissoring in GL coordinates:
 216        */
 217       if (ctx->Scissor.Enabled)
 218       {
 219          GLint x = ctx->Scissor.X;
 220          GLint y = ctx->Scissor.Y;
 221          GLuint w = ctx->Scissor.Width;
 222          GLuint h = ctx->Scissor.Height;
 223
 224          if (!_mesa_clip_to_region(x, y, x+w-1, y+h-1, &dstx, &dsty, &width, &height))
 225             goto out;
 226       }
 227
 228       /* Convert from GL to hardware coordinates:
 229        */
 230       dsty = dPriv->y + (dPriv->h - dsty - height);
 231       dstx = dPriv->x + dstx;
 232
 233       dest_rect.x1 = dstx < 0 ? 0 : dstx;
 234       dest_rect.y1 = dsty < 0 ? 0 : dsty;
 235       dest_rect.x2 = dstx + width < 0 ? 0 : dstx + width;
 236       dest_rect.y2 = dsty + height < 0 ? 0 : dsty + height;
 237
 238       for (i = 0; i < nbox; i++) {
 239          drm_clip_rect_t rect;
 240          int box_w, box_h;
 241          GLint px, py;
 242          GLuint stipple[32];
 243
 244          if (!intel_intersect_cliprects(&rect, &dest_rect, &box[i]))
 245             continue;
 246
 247          /* Now go back to GL coordinates to figure out what subset of
 248           * the bitmap we are uploading for this cliprect:
 249           */
 250          box_w = rect.x2 - rect.x1;
 251          box_h = rect.y2 - rect.y1;
 252          srcx = rect.x1 - orig_screen_x1;
 253          srcy = orig_screen_y2 - rect.y2;
 254
 255
 256 #define DY 32
 257 #define DX 32
 258
 259          /* Then, finally, chop it all into chunks that can be
 260           * digested by hardware:
 261           */
 262          for (py = 0; py < box_h; py += DY) {
 263             for (px = 0; px < box_w; px += DX) {
 264                int h = MIN2(DY, box_h - py);
 265                int w = MIN2(DX, box_w - px);
 266                GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8;
 267                GLenum logic_op = ctx->Color.ColorLogicOpEnabled ?
 268                   ctx->Color.LogicOp : GL_COPY;
 269
 270                assert(sz <= sizeof(stipple));
 271                memset(stipple, 0, sz);
 272
 273                /* May need to adjust this when padding has been introduced in
 274                 * sz above:
 275                 */
 276                if (get_bitmap_rect(width, height, unpack,
 277                                    bitmap,
 278                                    srcx + px, srcy + py, w, h,
 279                                    (GLubyte *)stipple,
 280                                    8,
 281                                    GL_TRUE) == 0)
 282                   continue;
 283
 284                /*
 285                 */
 286                intelEmitImmediateColorExpandBlit( intel,
 287                                                   dst->cpp,
 288                                                   (GLubyte *)stipple,
 289                                                   sz,
 290                                                   color.ui,
 291                                                   dst->pitch,
 292                                                   dst->buffer,
 293                                                   0,
 294                                                   dst->tiled,
 295                                                   rect.x1 + px,
 296                                                   rect.y2 - (py + h),
 297                                                   w, h,
 298                                                   logic_op);
 299             }
 300          }
 301       }
 302       intel->need_flush = GL_TRUE;
 303    out:
 304       intel_batchbuffer_flush(intel->batch);
 305    }
 306    UNLOCK_HARDWARE(intel);
 307
 308
 309    if (unpack->BufferObj->Name) {
 310       /* done with PBO so unmap it now */
 311       ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
 312                               unpack->BufferObj);
 313    }
 314
 315    return GL_TRUE;
 316 }
 317
 318
 319
 320
 321
 322 /* There are a large number of possible ways to implement bitmap on
 323  * this hardware, most of them have some sort of drawback.  Here are a
 324  * few that spring to mind:
 325  *
 326  * Blit:
 327  *    - XY_MONO_SRC_BLT_CMD
 328  *         - use XY_SETUP_CLIP_BLT for cliprect clipping.
 329  *    - XY_TEXT_BLT
 330  *    - XY_TEXT_IMMEDIATE_BLT
 331  *         - blit per cliprect, subject to maximum immediate data size.
 332  *    - XY_COLOR_BLT
 333  *         - per pixel or run of pixels
 334  *    - XY_PIXEL_BLT
 335  *         - good for sparse bitmaps
 336  *
 337  * 3D engine:
 338  *    - Point per pixel
 339  *    - Translate bitmap to an alpha texture and render as a quad
 340  *    - Chop bitmap up into 32x32 squares and render w/polygon stipple.
 341  */
 342 void
 343 intelBitmap(GLcontext * ctx,
 344             GLint x, GLint y,
 345             GLsizei width, GLsizei height,
 346             const struct gl_pixelstore_attrib *unpack,
 347             const GLubyte * pixels)
 348 {
 349    if (do_blit_bitmap(ctx, x, y, width, height,
 350                           unpack, pixels))
 351       return;
 352
 353    if (INTEL_DEBUG & DEBUG_PIXEL)
 354       _mesa_printf("%s: fallback to swrast\n", __FUNCTION__);
 355
 356    _swrast_Bitmap(ctx, x, y, width, height, unpack, pixels);
 357 }