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/texobj.h"
  41 #include "main/texstate.h"
  42 #include "main/texparam.h"
  43 #include "main/varray.h"
  44 #include "main/attrib.h"
  45 #include "main/enable.h"
  46 #include "main/viewport.h"
  47 #include "shader/arbprogram.h"
  48 #include "swrast/swrast.h"
  49
  50 #include "intel_screen.h"
  51 #include "intel_context.h"
  52 #include "intel_batchbuffer.h"
  53 #include "intel_blit.h"
  54 #include "intel_regions.h"
  55 #include "intel_buffers.h"
  56 #include "intel_pixel.h"
  57 #include "intel_reg.h"
  58
  59
  60 #define FILE_DEBUG_FLAG DEBUG_PIXEL
  61
  62
  63 /* Unlike the other intel_pixel_* functions, the expectation here is
  64  * that the incoming data is not in a PBO.  With the XY_TEXT blit
  65  * method, there's no benefit haveing it in a PBO, but we could
  66  * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit
  67  * PBO bitmaps.  I think they are probably pretty rare though - I
  68  * wonder if Xgl uses them?
  69  */
  70 static const GLubyte *map_pbo( GLcontext *ctx,
  71                                GLsizei width, GLsizei height,
  72                                const struct gl_pixelstore_attrib *unpack,
  73                                const GLubyte *bitmap )
  74 {
  75    GLubyte *buf;
  76
  77    if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
  78                                   GL_COLOR_INDEX, GL_BITMAP,
  79                                   (GLvoid *) bitmap)) {
  80       _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");
  81       return NULL;
  82    }
  83
  84    buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
  85                                            GL_READ_ONLY_ARB,
  86                                            unpack->BufferObj);
  87    if (!buf) {
  88       _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
  89       return NULL;
  90    }
  91
  92    return ADD_POINTERS(buf, bitmap);
  93 }
  94
  95 static GLboolean test_bit( const GLubyte *src, GLuint bit )
  96 {
  97    return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0;
  98 }
  99
 100 static void set_bit( GLubyte *dest, GLuint bit )
 101 {
 102    dest[bit/8] |= 1 << (bit % 8);
 103 }
 104
 105 /* Extract a rectangle's worth of data from the bitmap.  Called
 106  * per-cliprect.
 107  */
 108 static GLuint get_bitmap_rect(GLsizei width, GLsizei height,
 109                               const struct gl_pixelstore_attrib *unpack,
 110                               const GLubyte *bitmap,
 111                               GLuint x, GLuint y,
 112                               GLuint w, GLuint h,
 113                               GLubyte *dest,
 114                               GLuint row_align,
 115                               GLboolean invert)
 116 {
 117    GLuint src_offset = (x + unpack->SkipPixels) & 0x7;
 118    GLuint mask = unpack->LsbFirst ? 0 : 7;
 119    GLuint bit = 0;
 120    GLint row, col;
 121    GLint first, last;
 122    GLint incr;
 123    GLuint count = 0;
 124
 125    if (INTEL_DEBUG & DEBUG_PIXEL)
 126       _mesa_printf("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n",
 127                    __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask);
 128
 129    if (invert) {
 130       first = h-1;
 131       last = 0;
 132       incr = -1;
 133    }
 134    else {
 135       first = 0;
 136       last = h-1;
 137       incr = 1;
 138    }
 139
 140    /* Require that dest be pre-zero'd.
 141     */
 142    for (row = first; row != (last+incr); row += incr) {
 143       const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap,
 144                                                     width, height,
 145                                                     GL_COLOR_INDEX, GL_BITMAP,
 146                                                     y + row, x);
 147
 148       for (col = 0; col < w; col++, bit++) {
 149          if (test_bit(rowsrc, (col + src_offset) ^ mask)) {
 150             set_bit(dest, bit ^ 7);
 151             count++;
 152          }
 153       }
 154
 155       if (row_align)
 156          bit = ALIGN(bit, row_align);
 157    }
 158
 159    return count;
 160 }
 161
 162 /**
 163  * Returns the low Y value of the vertical range given, flipped according to
 164  * whether the framebuffer is or not.
 165  */
 166 static INLINE int
 167 y_flip(struct gl_framebuffer *fb, int y, int height)
 168 {
 169    if (fb->Name != 0)
 170       return y;
 171    else
 172       return fb->Height - y - height;
 173 }
 174
 175 /*
 176  * Render a bitmap.
 177  */
 178 static GLboolean
 179 do_blit_bitmap( GLcontext *ctx,
 180                 GLint dstx, GLint dsty,
 181                 GLsizei width, GLsizei height,
 182                 const struct gl_pixelstore_attrib *unpack,
 183                 const GLubyte *bitmap )
 184 {
 185    struct intel_context *intel = intel_context(ctx);
 186    struct intel_region *dst = intel_drawbuf_region(intel);
 187    struct gl_framebuffer *fb = ctx->DrawBuffer;
 188    GLfloat tmpColor[4];
 189    GLubyte ubcolor[4];
 190    GLuint color;
 191    unsigned int num_cliprects;
 192    drm_clip_rect_t *cliprects;
 193    int x_off, y_off;
 194    GLsizei bitmap_width = width;
 195    GLsizei bitmap_height = height;
 196
 197    /* Update draw buffer bounds */
 198    _mesa_update_state(ctx);
 199
 200    if (ctx->Depth.Test) {
 201       /* The blit path produces incorrect results when depth testing is on.
 202        * It seems the blit Z coord is always 1.0 (the far plane) so fragments
 203        * will likely be obscured by other, closer geometry.
 204        */
 205       return GL_FALSE;
 206    }
 207
 208    if (!dst)
 209        return GL_FALSE;
 210
 211    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 212       bitmap = map_pbo(ctx, width, height, unpack, bitmap);
 213       if (bitmap == NULL)
 214          return GL_TRUE;        /* even though this is an error, we're done */
 215    }
 216
 217    COPY_4V(tmpColor, ctx->Current.RasterColor);
 218
 219    if (NEED_SECONDARY_COLOR(ctx)) {
 220        ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor);
 221    }
 222
 223    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]);
 224    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]);
 225    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]);
 226    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]);
 227
 228    if (dst->cpp == 2)
 229       color = PACK_COLOR_565(ubcolor[0], ubcolor[1], ubcolor[2]);
 230    else
 231       color = PACK_COLOR_8888(ubcolor[3], ubcolor[0], ubcolor[1], ubcolor[2]);
 232
 233    if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F))
 234       return GL_FALSE;
 235
 236    intel_get_cliprects(intel, &cliprects, &num_cliprects, &x_off, &y_off);
 237    if (num_cliprects != 0) {
 238       GLuint i;
 239       GLint orig_dstx = dstx;
 240       GLint orig_dsty = dsty;
 241
 242       /* Clip to buffer bounds and scissor. */
 243       if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
 244                                 fb->_Xmax, fb->_Ymax,
 245                                 &dstx, &dsty, &width, &height))
 246             goto out;
 247
 248       dstx = x_off + dstx;
 249       dsty = y_off + y_flip(fb, dsty, height);
 250
 251       for (i = 0; i < num_cliprects; i++) {
 252          int box_x, box_y, box_w, box_h;
 253          GLint px, py;
 254          GLuint stipple[32];
 255
 256          box_x = dstx;
 257          box_y = dsty;
 258          box_w = width;
 259          box_h = height;
 260
 261          /* Clip to drawable cliprect */
 262          if (!_mesa_clip_to_region(cliprects[i].x1,
 263                                    cliprects[i].y1,
 264                                    cliprects[i].x2,
 265                                    cliprects[i].y2,
 266                                    &box_x, &box_y, &box_w, &box_h))
 267             continue;
 268
 269 #define DY 32
 270 #define DX 32
 271
 272          /* Then, finally, chop it all into chunks that can be
 273           * digested by hardware:
 274           */
 275          for (py = 0; py < box_h; py += DY) {
 276             for (px = 0; px < box_w; px += DX) {
 277                int h = MIN2(DY, box_h - py);
 278                int w = MIN2(DX, box_w - px);
 279                GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8;
 280                GLenum logic_op = ctx->Color.ColorLogicOpEnabled ?
 281                   ctx->Color.LogicOp : GL_COPY;
 282
 283                assert(sz <= sizeof(stipple));
 284                memset(stipple, 0, sz);
 285
 286                /* May need to adjust this when padding has been introduced in
 287                 * sz above:
 288                 *
 289                 * Have to translate destination coordinates back into source
 290                 * coordinates.
 291                 */
 292                if (get_bitmap_rect(bitmap_width, bitmap_height, unpack,
 293                                    bitmap,
 294                                    -orig_dstx + (box_x + px - x_off),
 295                                    -orig_dsty + y_flip(fb,
 296                                                        box_y + py - y_off, h),
 297                                    w, h,
 298                                    (GLubyte *)stipple,
 299                                    8,
 300                                    fb->Name == 0 ? GL_TRUE : GL_FALSE) == 0)
 301                   continue;
 302
 303                if (!intelEmitImmediateColorExpandBlit(intel,
 304                                                       dst->cpp,
 305                                                       (GLubyte *)stipple,
 306                                                       sz,
 307                                                       color,
 308                                                       dst->pitch,
 309                                                       dst->buffer,
 310                                                       0,
 311                                                       dst->tiling,
 312                                                       box_x + px,
 313                                                       box_y + py,
 314                                                       w, h,
 315                                                       logic_op)) {
 316                   return GL_FALSE;
 317                }
 318             }
 319          }
 320       }
 321    }
 322 out:
 323
 324    if (INTEL_DEBUG & DEBUG_SYNC)
 325       intel_batchbuffer_flush(intel->batch);
 326
 327    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 328       /* done with PBO so unmap it now */
 329       ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
 330                               unpack->BufferObj);
 331    }
 332
 333    intel_check_front_buffer_rendering(intel);
 334
 335    return GL_TRUE;
 336 }
 337
 338 static GLboolean
 339 intel_texture_bitmap(GLcontext * ctx,
 340                      GLint dst_x, GLint dst_y,
 341                      GLsizei width, GLsizei height,
 342                      const struct gl_pixelstore_attrib *unpack,
 343                      const GLubyte *bitmap)
 344 {
 345    struct intel_context *intel = intel_context(ctx);
 346    static const char *fp =
 347       "!!ARBfp1.0\n"
 348       "TEMP val;\n"
 349       "PARAM color=program.local[0];\n"
 350       "TEX val, fragment.texcoord[0], texture[0], 2D;\n"
 351       "ADD val, val.wwww, {-.5, -.5, -.5, -.5};\n"
 352       "KIL val;\n"
 353       "MOV result.color, color;\n"
 354       "END\n";
 355    GLuint texname;
 356    GLfloat vertices[4][4];
 357    GLint old_active_texture;
 358    GLubyte *a8_bitmap;
 359    GLfloat dst_z;
 360
 361    /* We need a fragment program for the KIL effect */
 362    if (!ctx->Extensions.ARB_fragment_program ||
 363        !ctx->Extensions.ARB_vertex_program) {
 364       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 365          fprintf(stderr,
 366                  "glBitmap fallback: No fragment/vertex program support\n");
 367       return GL_FALSE;
 368    }
 369
 370    /* We're going to mess with texturing with no regard to existing texture
 371     * state, so if there is some set up we have to bail.
 372     */
 373    if (ctx->Texture._EnabledUnits != 0) {
 374       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 375          fprintf(stderr, "glBitmap fallback: texturing enabled\n");
 376       return GL_FALSE;
 377    }
 378
 379    /* Can't do textured DrawPixels with a fragment program, unless we were
 380     * to generate a new program that sampled our texture and put the results
 381     * in the fragment color before the user's program started.
 382     */
 383    if (ctx->FragmentProgram.Enabled) {
 384       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 385          fprintf(stderr, "glBitmap fallback: fragment program enabled\n");
 386       return GL_FALSE;
 387    }
 388
 389    if (ctx->VertexProgram.Enabled) {
 390       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 391          fprintf(stderr, "glBitmap fallback: vertex program enabled\n");
 392       return GL_FALSE;
 393    }
 394
 395    if (!ctx->Extensions.ARB_texture_non_power_of_two &&
 396        (!is_power_of_two(width) || !is_power_of_two(height))) {
 397       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 398          fprintf(stderr,
 399                  "glBitmap() fallback: NPOT texture\n");
 400       return GL_FALSE;
 401    }
 402
 403    if (ctx->Fog.Enabled) {
 404       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 405          fprintf(stderr, "glBitmap() fallback: fog\n");
 406       return GL_FALSE;
 407    }
 408
 409    /* Check that we can load in a texture this big. */
 410    if (width > (1 << (ctx->Const.MaxTextureLevels - 1)) ||
 411        height > (1 << (ctx->Const.MaxTextureLevels - 1))) {
 412       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 413          fprintf(stderr, "glBitmap fallback: bitmap too large (%dx%d)\n",
 414                  width, height);
 415       return GL_FALSE;
 416    }
 417
 418    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 419       bitmap = map_pbo(ctx, width, height, unpack, bitmap);
 420       if (bitmap == NULL)
 421          return GL_TRUE;        /* even though this is an error, we're done */
 422    }
 423
 424    /* Convert the A1 bitmap to an A8 format suitable for glTexImage */
 425    a8_bitmap = _mesa_calloc(width * height);
 426    _mesa_expand_bitmap(width, height, unpack, bitmap, a8_bitmap, width, 0xff);
 427
 428    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 429       /* done with PBO so unmap it now */
 430       ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
 431                               unpack->BufferObj);
 432    }
 433
 434    /* Save GL state before we start setting up our drawing */
 435    _mesa_PushAttrib(GL_ENABLE_BIT | GL_CURRENT_BIT | GL_POLYGON_BIT |
 436                     GL_TEXTURE_BIT | GL_VIEWPORT_BIT);
 437    _mesa_PushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT |
 438                           GL_CLIENT_PIXEL_STORE_BIT);
 439    old_active_texture = ctx->Texture.CurrentUnit;
 440
 441    _mesa_Disable(GL_POLYGON_STIPPLE);
 442    _mesa_PolygonMode(GL_FRONT_AND_BACK, GL_FILL);
 443
 444    /* Upload our bitmap data to an alpha texture */
 445    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB);
 446    _mesa_Enable(GL_TEXTURE_2D);
 447    _mesa_GenTextures(1, &texname);
 448    _mesa_BindTexture(GL_TEXTURE_2D, texname);
 449    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 450    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 451
 452    _mesa_PixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
 453    _mesa_PixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE);
 454    _mesa_PixelStorei(GL_UNPACK_ROW_LENGTH, 0);
 455    _mesa_PixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
 456    _mesa_PixelStorei(GL_UNPACK_SKIP_ROWS, 0);
 457    _mesa_PixelStorei(GL_UNPACK_ALIGNMENT, 1);
 458    _mesa_TexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, width, height, 0,
 459                     GL_ALPHA, GL_UNSIGNED_BYTE, a8_bitmap);
 460    _mesa_free(a8_bitmap);
 461
 462    meta_set_fragment_program(&intel->meta, &intel->meta.bitmap_fp, fp);
 463    _mesa_ProgramLocalParameter4fvARB(GL_FRAGMENT_PROGRAM_ARB, 0,
 464                                      ctx->Current.RasterColor);
 465    meta_set_passthrough_vertex_program(&intel->meta);
 466    meta_set_passthrough_transform(&intel->meta);
 467
 468    /* convert rasterpos Z from [0,1] to NDC coord in [-1,1] */
 469    dst_z = -1.0 + 2.0 * ctx->Current.RasterPos[2];
 470
 471    /* RasterPos[2] already takes into account the DepthRange mapping. */
 472    _mesa_DepthRange(0.0, 1.0);
 473
 474    vertices[0][0] = dst_x;
 475    vertices[0][1] = dst_y;
 476    vertices[0][2] = dst_z;
 477    vertices[0][3] = 1.0;
 478    vertices[1][0] = dst_x + width;
 479    vertices[1][1] = dst_y;
 480    vertices[1][2] = dst_z;
 481    vertices[1][3] = 1.0;
 482    vertices[2][0] = dst_x + width;
 483    vertices[2][1] = dst_y + height;
 484    vertices[2][2] = dst_z;
 485    vertices[2][3] = 1.0;
 486    vertices[3][0] = dst_x;
 487    vertices[3][1] = dst_y + height;
 488    vertices[3][2] = dst_z;
 489    vertices[3][3] = 1.0;
 490
 491    _mesa_VertexPointer(4, GL_FLOAT, 4 * sizeof(GLfloat), &vertices);
 492    _mesa_Enable(GL_VERTEX_ARRAY);
 493    meta_set_default_texrect(&intel->meta);
 494    _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
 495
 496    meta_restore_texcoords(&intel->meta);
 497    meta_restore_transform(&intel->meta);
 498    meta_restore_fragment_program(&intel->meta);
 499    meta_restore_vertex_program(&intel->meta);
 500
 501    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + old_active_texture);
 502    _mesa_PopClientAttrib();
 503    _mesa_PopAttrib();
 504
 505    _mesa_DeleteTextures(1, &texname);
 506
 507    return GL_TRUE;
 508 }
 509
 510 /* There are a large number of possible ways to implement bitmap on
 511  * this hardware, most of them have some sort of drawback.  Here are a
 512  * few that spring to mind:
 513  *
 514  * Blit:
 515  *    - XY_MONO_SRC_BLT_CMD
 516  *         - use XY_SETUP_CLIP_BLT for cliprect clipping.
 517  *    - XY_TEXT_BLT
 518  *    - XY_TEXT_IMMEDIATE_BLT
 519  *         - blit per cliprect, subject to maximum immediate data size.
 520  *    - XY_COLOR_BLT
 521  *         - per pixel or run of pixels
 522  *    - XY_PIXEL_BLT
 523  *         - good for sparse bitmaps
 524  *
 525  * 3D engine:
 526  *    - Point per pixel
 527  *    - Translate bitmap to an alpha texture and render as a quad
 528  *    - Chop bitmap up into 32x32 squares and render w/polygon stipple.
 529  */
 530 void
 531 intelBitmap(GLcontext * ctx,
 532             GLint x, GLint y,
 533             GLsizei width, GLsizei height,
 534             const struct gl_pixelstore_attrib *unpack,
 535             const GLubyte * pixels)
 536 {
 537    if (do_blit_bitmap(ctx, x, y, width, height,
 538                           unpack, pixels))
 539       return;
 540
 541    if (intel_texture_bitmap(ctx, x, y, width, height,
 542                             unpack, pixels))
 543       return;
 544
 545    if (INTEL_DEBUG & DEBUG_PIXEL)
 546       _mesa_printf("%s: fallback to swrast\n", __FUNCTION__);
 547
 548    _swrast_Bitmap(ctx, x, y, width, height, unpack, pixels);
 549 }