src/mesa/drivers/dri/intel/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 "main/glheader.h"
  29 #include "main/enums.h"
  30 #include "main/image.h"
  31 #include "main/colormac.h"
  32 #include "main/mtypes.h"
  33 #include "main/macros.h"
  34 #include "main/bufferobj.h"
  35 #include "main/polygon.h"
  36 #include "main/pixelstore.h"
  37 #include "main/polygon.h"
  38 #include "main/state.h"
  39 #include "main/teximage.h"
  40 #include "main/texenv.h"
  41 #include "main/texobj.h"
  42 #include "main/texstate.h"
  43 #include "main/texparam.h"
  44 #include "main/varray.h"
  45 #include "main/attrib.h"
  46 #include "main/enable.h"
  47 #include "main/viewport.h"
  48 #include "shader/arbprogram.h"
  49 #include "glapi/dispatch.h"
  50 #include "swrast/swrast.h"
  51
  52 #include "intel_screen.h"
  53 #include "intel_context.h"
  54 #include "intel_batchbuffer.h"
  55 #include "intel_blit.h"
  56 #include "intel_regions.h"
  57 #include "intel_buffer_objects.h"
  58 #include "intel_buffers.h"
  59 #include "intel_pixel.h"
  60 #include "intel_reg.h"
  61
  62
  63 #define FILE_DEBUG_FLAG DEBUG_PIXEL
  64
  65
  66 /* Unlike the other intel_pixel_* functions, the expectation here is
  67  * that the incoming data is not in a PBO.  With the XY_TEXT blit
  68  * method, there's no benefit haveing it in a PBO, but we could
  69  * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit
  70  * PBO bitmaps.  I think they are probably pretty rare though - I
  71  * wonder if Xgl uses them?
  72  */
  73 static const GLubyte *map_pbo( GLcontext *ctx,
  74                                GLsizei width, GLsizei height,
  75                                const struct gl_pixelstore_attrib *unpack,
  76                                const GLubyte *bitmap )
  77 {
  78    GLubyte *buf;
  79
  80    if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
  81                                   GL_COLOR_INDEX, GL_BITMAP,
  82                                   (GLvoid *) bitmap)) {
  83       _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");
  84       return NULL;
  85    }
  86
  87    buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
  88                                            GL_READ_ONLY_ARB,
  89                                            unpack->BufferObj);
  90    if (!buf) {
  91       _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
  92       return NULL;
  93    }
  94
  95    return ADD_POINTERS(buf, bitmap);
  96 }
  97
  98 static GLboolean test_bit( const GLubyte *src, GLuint bit )
  99 {
 100    return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0;
 101 }
 102
 103 static void set_bit( GLubyte *dest, GLuint bit )
 104 {
 105    dest[bit/8] |= 1 << (bit % 8);
 106 }
 107
 108 /* Extract a rectangle's worth of data from the bitmap.  Called
 109  * per-cliprect.
 110  */
 111 static GLuint get_bitmap_rect(GLsizei width, GLsizei height,
 112                               const struct gl_pixelstore_attrib *unpack,
 113                               const GLubyte *bitmap,
 114                               GLuint x, GLuint y,
 115                               GLuint w, GLuint h,
 116                               GLubyte *dest,
 117                               GLuint row_align,
 118                               GLboolean invert)
 119 {
 120    GLuint src_offset = (x + unpack->SkipPixels) & 0x7;
 121    GLuint mask = unpack->LsbFirst ? 0 : 7;
 122    GLuint bit = 0;
 123    GLint row, col;
 124    GLint first, last;
 125    GLint incr;
 126    GLuint count = 0;
 127
 128    if (INTEL_DEBUG & DEBUG_PIXEL)
 129       _mesa_printf("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n",
 130                    __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask);
 131
 132    if (invert) {
 133       first = h-1;
 134       last = 0;
 135       incr = -1;
 136    }
 137    else {
 138       first = 0;
 139       last = h-1;
 140       incr = 1;
 141    }
 142
 143    /* Require that dest be pre-zero'd.
 144     */
 145    for (row = first; row != (last+incr); row += incr) {
 146       const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap,
 147                                                     width, height,
 148                                                     GL_COLOR_INDEX, GL_BITMAP,
 149                                                     y + row, x);
 150
 151       for (col = 0; col < w; col++, bit++) {
 152          if (test_bit(rowsrc, (col + src_offset) ^ mask)) {
 153             set_bit(dest, bit ^ 7);
 154             count++;
 155          }
 156       }
 157
 158       if (row_align)
 159          bit = ALIGN(bit, row_align);
 160    }
 161
 162    return count;
 163 }
 164
 165 /**
 166  * Returns the low Y value of the vertical range given, flipped according to
 167  * whether the framebuffer is or not.
 168  */
 169 static inline int
 170 y_flip(struct gl_framebuffer *fb, int y, int height)
 171 {
 172    if (fb->Name != 0)
 173       return y;
 174    else
 175       return fb->Height - y - height;
 176 }
 177
 178 /*
 179  * Render a bitmap.
 180  */
 181 static GLboolean
 182 do_blit_bitmap( GLcontext *ctx,
 183                 GLint dstx, GLint dsty,
 184                 GLsizei width, GLsizei height,
 185                 const struct gl_pixelstore_attrib *unpack,
 186                 const GLubyte *bitmap )
 187 {
 188    struct intel_context *intel = intel_context(ctx);
 189    struct intel_region *dst = intel_drawbuf_region(intel);
 190    struct gl_framebuffer *fb = ctx->DrawBuffer;
 191    GLfloat tmpColor[4];
 192    GLubyte ubcolor[4];
 193    GLuint color;
 194    unsigned int num_cliprects;
 195    drm_clip_rect_t *cliprects;
 196    int x_off, y_off;
 197    GLsizei bitmap_width = width;
 198    GLsizei bitmap_height = height;
 199
 200    /* Update draw buffer bounds */
 201    _mesa_update_state(ctx);
 202
 203    if (ctx->Depth.Test) {
 204       /* The blit path produces incorrect results when depth testing is on.
 205        * It seems the blit Z coord is always 1.0 (the far plane) so fragments
 206        * will likely be obscured by other, closer geometry.
 207        */
 208       return GL_FALSE;
 209    }
 210
 211    if (!dst)
 212        return GL_FALSE;
 213
 214    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 215       bitmap = map_pbo(ctx, width, height, unpack, bitmap);
 216       if (bitmap == NULL)
 217          return GL_TRUE;        /* even though this is an error, we're done */
 218    }
 219
 220    COPY_4V(tmpColor, ctx->Current.RasterColor);
 221
 222    if (NEED_SECONDARY_COLOR(ctx)) {
 223        ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor);
 224    }
 225
 226    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]);
 227    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]);
 228    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]);
 229    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]);
 230
 231    if (dst->cpp == 2)
 232       color = INTEL_PACKCOLOR565(ubcolor[0], ubcolor[1], ubcolor[2]);
 233    else
 234       color = INTEL_PACKCOLOR8888(ubcolor[0], ubcolor[1],
 235                                   ubcolor[2], ubcolor[3]);
 236
 237    if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F))
 238       return GL_FALSE;
 239
 240    LOCK_HARDWARE(intel);
 241
 242    intel_get_cliprects(intel, &cliprects, &num_cliprects, &x_off, &y_off);
 243    if (num_cliprects != 0) {
 244       GLuint i;
 245       GLint orig_dstx = dstx;
 246       GLint orig_dsty = dsty;
 247
 248       /* Clip to buffer bounds and scissor. */
 249       if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
 250                                 fb->_Xmax, fb->_Ymax,
 251                                 &dstx, &dsty, &width, &height))
 252             goto out;
 253
 254       dstx = x_off + dstx;
 255       dsty = y_off + y_flip(fb, dsty, height);
 256
 257       for (i = 0; i < num_cliprects; i++) {
 258          int box_x, box_y, box_w, box_h;
 259          GLint px, py;
 260          GLuint stipple[32];
 261
 262          box_x = dstx;
 263          box_y = dsty;
 264          box_w = width;
 265          box_h = height;
 266
 267          /* Clip to drawable cliprect */
 268          if (!_mesa_clip_to_region(cliprects[i].x1,
 269                                    cliprects[i].y1,
 270                                    cliprects[i].x2,
 271                                    cliprects[i].y2,
 272                                    &box_x, &box_y, &box_w, &box_h))
 273             continue;
 274
 275 #define DY 32
 276 #define DX 32
 277
 278          /* Then, finally, chop it all into chunks that can be
 279           * digested by hardware:
 280           */
 281          for (py = 0; py < box_h; py += DY) {
 282             for (px = 0; px < box_w; px += DX) {
 283                int h = MIN2(DY, box_h - py);
 284                int w = MIN2(DX, box_w - px);
 285                GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8;
 286                GLenum logic_op = ctx->Color.ColorLogicOpEnabled ?
 287                   ctx->Color.LogicOp : GL_COPY;
 288
 289                assert(sz <= sizeof(stipple));
 290                memset(stipple, 0, sz);
 291
 292                /* May need to adjust this when padding has been introduced in
 293                 * sz above:
 294                 *
 295                 * Have to translate destination coordinates back into source
 296                 * coordinates.
 297                 */
 298                if (get_bitmap_rect(bitmap_width, bitmap_height, unpack,
 299                                    bitmap,
 300                                    -orig_dstx + (box_x + px - x_off),
 301                                    -orig_dsty + y_flip(fb,
 302                                                        box_y + py - y_off, h),
 303                                    w, h,
 304                                    (GLubyte *)stipple,
 305                                    8,
 306                                    fb->Name == 0 ? GL_TRUE : GL_FALSE) == 0)
 307                   continue;
 308
 309                if (!intelEmitImmediateColorExpandBlit(intel,
 310                                                       dst->cpp,
 311                                                       (GLubyte *)stipple,
 312                                                       sz,
 313                                                       color,
 314                                                       dst->pitch,
 315                                                       dst->buffer,
 316                                                       0,
 317                                                       dst->tiling,
 318                                                       box_x + px,
 319                                                       box_y + py,
 320                                                       w, h,
 321                                                       logic_op)) {
 322                   return GL_FALSE;
 323                }
 324             }
 325          }
 326       }
 327    }
 328 out:
 329    UNLOCK_HARDWARE(intel);
 330
 331    if (INTEL_DEBUG & DEBUG_SYNC)
 332       intel_batchbuffer_flush(intel->batch);
 333
 334    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 335       /* done with PBO so unmap it now */
 336       ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
 337                               unpack->BufferObj);
 338    }
 339
 340    intel_check_front_buffer_rendering(intel);
 341
 342    return GL_TRUE;
 343 }
 344
 345 static GLboolean
 346 intel_texture_bitmap(GLcontext * ctx,
 347                      GLint dst_x, GLint dst_y,
 348                      GLsizei width, GLsizei height,
 349                      const struct gl_pixelstore_attrib *unpack,
 350                      const GLubyte *bitmap)
 351 {
 352    struct intel_context *intel = intel_context(ctx);
 353    static const char *fp =
 354       "!!ARBfp1.0\n"
 355       "TEMP val;\n"
 356       "PARAM color=program.local[0];\n"
 357       "TEX val, fragment.texcoord[0], texture[0], 2D;\n"
 358       "ADD val, val.wwww, {-.5, -.5, -.5, -.5};\n"
 359       "KIL val;\n"
 360       "MOV result.color, color;\n"
 361       "END\n";
 362    GLuint texname;
 363    GLfloat vertices[4][4];
 364    GLint old_active_texture;
 365    GLubyte *a8_bitmap;
 366    GLfloat dst_z;
 367
 368    /* We need a fragment program for the KIL effect */
 369    if (!ctx->Extensions.ARB_fragment_program ||
 370        !ctx->Extensions.ARB_vertex_program) {
 371       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 372          fprintf(stderr,
 373                  "glBitmap fallback: No fragment/vertex program support\n");
 374       return GL_FALSE;
 375    }
 376
 377    /* We're going to mess with texturing with no regard to existing texture
 378     * state, so if there is some set up we have to bail.
 379     */
 380    if (ctx->Texture._EnabledUnits != 0) {
 381       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 382          fprintf(stderr, "glBitmap fallback: texturing enabled\n");
 383       return GL_FALSE;
 384    }
 385
 386    /* Can't do textured DrawPixels with a fragment program, unless we were
 387     * to generate a new program that sampled our texture and put the results
 388     * in the fragment color before the user's program started.
 389     */
 390    if (ctx->FragmentProgram.Enabled) {
 391       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 392          fprintf(stderr, "glBitmap fallback: fragment program enabled\n");
 393       return GL_FALSE;
 394    }
 395
 396    if (ctx->VertexProgram.Enabled) {
 397       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 398          fprintf(stderr, "glBitmap fallback: vertex program enabled\n");
 399       return GL_FALSE;
 400    }
 401
 402    if (!ctx->Extensions.ARB_texture_non_power_of_two &&
 403        (!is_power_of_two(width) || !is_power_of_two(height))) {
 404       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 405          fprintf(stderr,
 406                  "glBitmap() fallback: NPOT texture\n");
 407       return GL_FALSE;
 408    }
 409
 410    if (ctx->Fog.Enabled) {
 411       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 412          fprintf(stderr, "glBitmap() fallback: fog\n");
 413       return GL_FALSE;
 414    }
 415
 416    /* Check that we can load in a texture this big. */
 417    if (width > (1 << (ctx->Const.MaxTextureLevels - 1)) ||
 418        height > (1 << (ctx->Const.MaxTextureLevels - 1))) {
 419       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 420          fprintf(stderr, "glBitmap fallback: bitmap too large (%dx%d)\n",
 421                  width, height);
 422       return GL_FALSE;
 423    }
 424
 425    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 426       bitmap = map_pbo(ctx, width, height, unpack, bitmap);
 427       if (bitmap == NULL)
 428          return GL_TRUE;        /* even though this is an error, we're done */
 429    }
 430
 431    /* Convert the A1 bitmap to an A8 format suitable for glTexImage */
 432    a8_bitmap = _mesa_calloc(width * height);
 433    _mesa_expand_bitmap(width, height, unpack, bitmap, a8_bitmap, width, 0xff);
 434
 435    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 436       /* done with PBO so unmap it now */
 437       ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
 438                               unpack->BufferObj);
 439    }
 440
 441    /* Save GL state before we start setting up our drawing */
 442    _mesa_PushAttrib(GL_ENABLE_BIT | GL_CURRENT_BIT | GL_POLYGON_BIT |
 443                     GL_TEXTURE_BIT | GL_VIEWPORT_BIT);
 444    _mesa_PushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT |
 445                           GL_CLIENT_PIXEL_STORE_BIT);
 446    old_active_texture = ctx->Texture.CurrentUnit;
 447
 448    _mesa_Disable(GL_POLYGON_STIPPLE);
 449    _mesa_PolygonMode(GL_FRONT_AND_BACK, GL_FILL);
 450
 451    /* Upload our bitmap data to an alpha texture */
 452    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB);
 453    _mesa_Enable(GL_TEXTURE_2D);
 454    _mesa_GenTextures(1, &texname);
 455    _mesa_BindTexture(GL_TEXTURE_2D, texname);
 456    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 457    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 458
 459    _mesa_PixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
 460    _mesa_PixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE);
 461    _mesa_PixelStorei(GL_UNPACK_ROW_LENGTH, 0);
 462    _mesa_PixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
 463    _mesa_PixelStorei(GL_UNPACK_SKIP_ROWS, 0);
 464    _mesa_PixelStorei(GL_UNPACK_ALIGNMENT, 1);
 465    _mesa_TexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, width, height, 0,
 466                     GL_ALPHA, GL_UNSIGNED_BYTE, a8_bitmap);
 467    _mesa_free(a8_bitmap);
 468
 469    meta_set_fragment_program(&intel->meta, &intel->meta.bitmap_fp, fp);
 470    _mesa_ProgramLocalParameter4fvARB(GL_FRAGMENT_PROGRAM_ARB, 0,
 471                                      ctx->Current.RasterColor);
 472    meta_set_passthrough_vertex_program(&intel->meta);
 473    meta_set_passthrough_transform(&intel->meta);
 474
 475    /* convert rasterpos Z from [0,1] to NDC coord in [-1,1] */
 476    dst_z = -1.0 + 2.0 * ctx->Current.RasterPos[2];
 477
 478    /* RasterPos[2] already takes into account the DepthRange mapping. */
 479    _mesa_DepthRange(0.0, 1.0);
 480
 481    vertices[0][0] = dst_x;
 482    vertices[0][1] = dst_y;
 483    vertices[0][2] = dst_z;
 484    vertices[0][3] = 1.0;
 485    vertices[1][0] = dst_x + width;
 486    vertices[1][1] = dst_y;
 487    vertices[1][2] = dst_z;
 488    vertices[1][3] = 1.0;
 489    vertices[2][0] = dst_x + width;
 490    vertices[2][1] = dst_y + height;
 491    vertices[2][2] = dst_z;
 492    vertices[2][3] = 1.0;
 493    vertices[3][0] = dst_x;
 494    vertices[3][1] = dst_y + height;
 495    vertices[3][2] = dst_z;
 496    vertices[3][3] = 1.0;
 497
 498    _mesa_VertexPointer(4, GL_FLOAT, 4 * sizeof(GLfloat), &vertices);
 499    _mesa_Enable(GL_VERTEX_ARRAY);
 500    meta_set_default_texrect(&intel->meta);
 501    _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
 502
 503    meta_restore_texcoords(&intel->meta);
 504    meta_restore_transform(&intel->meta);
 505    meta_restore_fragment_program(&intel->meta);
 506    meta_restore_vertex_program(&intel->meta);
 507
 508    _mesa_PopClientAttrib();
 509    _mesa_PopAttrib();
 510
 511    _mesa_DeleteTextures(1, &texname);
 512
 513    return GL_TRUE;
 514 }
 515
 516 /* There are a large number of possible ways to implement bitmap on
 517  * this hardware, most of them have some sort of drawback.  Here are a
 518  * few that spring to mind:
 519  *
 520  * Blit:
 521  *    - XY_MONO_SRC_BLT_CMD
 522  *         - use XY_SETUP_CLIP_BLT for cliprect clipping.
 523  *    - XY_TEXT_BLT
 524  *    - XY_TEXT_IMMEDIATE_BLT
 525  *         - blit per cliprect, subject to maximum immediate data size.
 526  *    - XY_COLOR_BLT
 527  *         - per pixel or run of pixels
 528  *    - XY_PIXEL_BLT
 529  *         - good for sparse bitmaps
 530  *
 531  * 3D engine:
 532  *    - Point per pixel
 533  *    - Translate bitmap to an alpha texture and render as a quad
 534  *    - Chop bitmap up into 32x32 squares and render w/polygon stipple.
 535  */
 536 void
 537 intelBitmap(GLcontext * ctx,
 538             GLint x, GLint y,
 539             GLsizei width, GLsizei height,
 540             const struct gl_pixelstore_attrib *unpack,
 541             const GLubyte * pixels)
 542 {
 543    if (do_blit_bitmap(ctx, x, y, width, height,
 544                           unpack, pixels))
 545       return;
 546
 547    if (intel_texture_bitmap(ctx, x, y, width, height,
 548                             unpack, pixels))
 549       return;
 550
 551    if (INTEL_DEBUG & DEBUG_PIXEL)
 552       _mesa_printf("%s: fallback to swrast\n", __FUNCTION__);
 553
 554    _swrast_Bitmap(ctx, x, y, width, height, unpack, pixels);
 555 }