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/pixelstore.h"
  36 #include "main/polygon.h"
  37 #include "main/state.h"
  38 #include "main/teximage.h"
  39 #include "main/texenv.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 "glapi/dispatch.h"
  49 #include "swrast/swrast.h"
  50
  51 #include "intel_screen.h"
  52 #include "intel_context.h"
  53 #include "intel_batchbuffer.h"
  54 #include "intel_blit.h"
  55 #include "intel_regions.h"
  56 #include "intel_buffer_objects.h"
  57 #include "intel_buffers.h"
  58 #include "intel_pixel.h"
  59 #include "intel_reg.h"
  60
  61
  62 #define FILE_DEBUG_FLAG DEBUG_PIXEL
  63
  64
  65 /* Unlike the other intel_pixel_* functions, the expectation here is
  66  * that the incoming data is not in a PBO.  With the XY_TEXT blit
  67  * method, there's no benefit haveing it in a PBO, but we could
  68  * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit
  69  * PBO bitmaps.  I think they are probably pretty rare though - I
  70  * wonder if Xgl uses them?
  71  */
  72 static const GLubyte *map_pbo( GLcontext *ctx,
  73                                GLsizei width, GLsizei height,
  74                                const struct gl_pixelstore_attrib *unpack,
  75                                const GLubyte *bitmap )
  76 {
  77    GLubyte *buf;
  78
  79    if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
  80                                   GL_COLOR_INDEX, GL_BITMAP,
  81                                   (GLvoid *) bitmap)) {
  82       _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");
  83       return NULL;
  84    }
  85
  86    buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
  87                                            GL_READ_ONLY_ARB,
  88                                            unpack->BufferObj);
  89    if (!buf) {
  90       _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
  91       return NULL;
  92    }
  93
  94    return ADD_POINTERS(buf, bitmap);
  95 }
  96
  97 static GLboolean test_bit( const GLubyte *src, GLuint bit )
  98 {
  99    return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0;
 100 }
 101
 102 static void set_bit( GLubyte *dest, GLuint bit )
 103 {
 104    dest[bit/8] |= 1 << (bit % 8);
 105 }
 106
 107 /* Extract a rectangle's worth of data from the bitmap.  Called
 108  * per-cliprect.
 109  */
 110 static GLuint get_bitmap_rect(GLsizei width, GLsizei height,
 111                               const struct gl_pixelstore_attrib *unpack,
 112                               const GLubyte *bitmap,
 113                               GLuint x, GLuint y,
 114                               GLuint w, GLuint h,
 115                               GLubyte *dest,
 116                               GLuint row_align,
 117                               GLboolean invert)
 118 {
 119    GLuint src_offset = (x + unpack->SkipPixels) & 0x7;
 120    GLuint mask = unpack->LsbFirst ? 0 : 7;
 121    GLuint bit = 0;
 122    GLint row, col;
 123    GLint first, last;
 124    GLint incr;
 125    GLuint count = 0;
 126
 127    if (INTEL_DEBUG & DEBUG_PIXEL)
 128       _mesa_printf("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n",
 129                    __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask);
 130
 131    if (invert) {
 132       first = h-1;
 133       last = 0;
 134       incr = -1;
 135    }
 136    else {
 137       first = 0;
 138       last = h-1;
 139       incr = 1;
 140    }
 141
 142    /* Require that dest be pre-zero'd.
 143     */
 144    for (row = first; row != (last+incr); row += incr) {
 145       const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap,
 146                                                     width, height,
 147                                                     GL_COLOR_INDEX, GL_BITMAP,
 148                                                     y + row, x);
 149
 150       for (col = 0; col < w; col++, bit++) {
 151          if (test_bit(rowsrc, (col + src_offset) ^ mask)) {
 152             set_bit(dest, bit ^ 7);
 153             count++;
 154          }
 155       }
 156
 157       if (row_align)
 158          bit = ALIGN(bit, row_align);
 159    }
 160
 161    return count;
 162 }
 163
 164 /**
 165  * Returns the low Y value of the vertical range given, flipped according to
 166  * whether the framebuffer is or not.
 167  */
 168 static inline int
 169 y_flip(struct gl_framebuffer *fb, int y, int height)
 170 {
 171    if (fb->Name != 0)
 172       return y;
 173    else
 174       return fb->Height - y - height;
 175 }
 176
 177 /*
 178  * Render a bitmap.
 179  */
 180 static GLboolean
 181 do_blit_bitmap( GLcontext *ctx,
 182                 GLint dstx, GLint dsty,
 183                 GLsizei width, GLsizei height,
 184                 const struct gl_pixelstore_attrib *unpack,
 185                 const GLubyte *bitmap )
 186 {
 187    struct intel_context *intel = intel_context(ctx);
 188    struct intel_region *dst = intel_drawbuf_region(intel);
 189    struct gl_framebuffer *fb = ctx->DrawBuffer;
 190    GLfloat tmpColor[4];
 191    GLubyte ubcolor[4];
 192    GLuint color;
 193    unsigned int num_cliprects;
 194    drm_clip_rect_t *cliprects;
 195    int x_off, y_off;
 196    GLsizei bitmap_width = width;
 197    GLsizei bitmap_height = height;
 198
 199    /* Update draw buffer bounds */
 200    _mesa_update_state(ctx);
 201
 202    if (ctx->Depth.Test) {
 203       /* The blit path produces incorrect results when depth testing is on.
 204        * It seems the blit Z coord is always 1.0 (the far plane) so fragments
 205        * will likely be obscured by other, closer geometry.
 206        */
 207       return GL_FALSE;
 208    }
 209
 210    if (!dst)
 211        return GL_FALSE;
 212
 213    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 214       bitmap = map_pbo(ctx, width, height, unpack, bitmap);
 215       if (bitmap == NULL)
 216          return GL_TRUE;        /* even though this is an error, we're done */
 217    }
 218
 219    COPY_4V(tmpColor, ctx->Current.RasterColor);
 220
 221    if (NEED_SECONDARY_COLOR(ctx)) {
 222        ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor);
 223    }
 224
 225    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]);
 226    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]);
 227    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]);
 228    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]);
 229
 230    if (dst->cpp == 2)
 231       color = PACK_COLOR_565(ubcolor[0], ubcolor[1], ubcolor[2]);
 232    else
 233       color = PACK_COLOR_8888(ubcolor[3], ubcolor[0], ubcolor[1], ubcolor[2]);
 234
 235    if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F))
 236       return GL_FALSE;
 237
 238    LOCK_HARDWARE(intel);
 239
 240    intel_get_cliprects(intel, &cliprects, &num_cliprects, &x_off, &y_off);
 241    if (num_cliprects != 0) {
 242       GLuint i;
 243       GLint orig_dstx = dstx;
 244       GLint orig_dsty = dsty;
 245
 246       /* Clip to buffer bounds and scissor. */
 247       if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
 248                                 fb->_Xmax, fb->_Ymax,
 249                                 &dstx, &dsty, &width, &height))
 250             goto out;
 251
 252       dstx = x_off + dstx;
 253       dsty = y_off + y_flip(fb, dsty, height);
 254
 255       for (i = 0; i < num_cliprects; i++) {
 256          int box_x, box_y, box_w, box_h;
 257          GLint px, py;
 258          GLuint stipple[32];
 259
 260          box_x = dstx;
 261          box_y = dsty;
 262          box_w = width;
 263          box_h = height;
 264
 265          /* Clip to drawable cliprect */
 266          if (!_mesa_clip_to_region(cliprects[i].x1,
 267                                    cliprects[i].y1,
 268                                    cliprects[i].x2,
 269                                    cliprects[i].y2,
 270                                    &box_x, &box_y, &box_w, &box_h))
 271             continue;
 272
 273 #define DY 32
 274 #define DX 32
 275
 276          /* Then, finally, chop it all into chunks that can be
 277           * digested by hardware:
 278           */
 279          for (py = 0; py < box_h; py += DY) {
 280             for (px = 0; px < box_w; px += DX) {
 281                int h = MIN2(DY, box_h - py);
 282                int w = MIN2(DX, box_w - px);
 283                GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8;
 284                GLenum logic_op = ctx->Color.ColorLogicOpEnabled ?
 285                   ctx->Color.LogicOp : GL_COPY;
 286
 287                assert(sz <= sizeof(stipple));
 288                memset(stipple, 0, sz);
 289
 290                /* May need to adjust this when padding has been introduced in
 291                 * sz above:
 292                 *
 293                 * Have to translate destination coordinates back into source
 294                 * coordinates.
 295                 */
 296                if (get_bitmap_rect(bitmap_width, bitmap_height, unpack,
 297                                    bitmap,
 298                                    -orig_dstx + (box_x + px - x_off),
 299                                    -orig_dsty + y_flip(fb,
 300                                                        box_y + py - y_off, h),
 301                                    w, h,
 302                                    (GLubyte *)stipple,
 303                                    8,
 304                                    fb->Name == 0 ? GL_TRUE : GL_FALSE) == 0)
 305                   continue;
 306
 307                if (!intelEmitImmediateColorExpandBlit(intel,
 308                                                       dst->cpp,
 309                                                       (GLubyte *)stipple,
 310                                                       sz,
 311                                                       color,
 312                                                       dst->pitch,
 313                                                       dst->buffer,
 314                                                       0,
 315                                                       dst->tiling,
 316                                                       box_x + px,
 317                                                       box_y + py,
 318                                                       w, h,
 319                                                       logic_op)) {
 320                   return GL_FALSE;
 321                }
 322             }
 323          }
 324       }
 325    }
 326 out:
 327    UNLOCK_HARDWARE(intel);
 328
 329    if (INTEL_DEBUG & DEBUG_SYNC)
 330       intel_batchbuffer_flush(intel->batch);
 331
 332    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 333       /* done with PBO so unmap it now */
 334       ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
 335                               unpack->BufferObj);
 336    }
 337
 338    intel_check_front_buffer_rendering(intel);
 339
 340    return GL_TRUE;
 341 }
 342
 343 static GLboolean
 344 intel_texture_bitmap(GLcontext * ctx,
 345                      GLint dst_x, GLint dst_y,
 346                      GLsizei width, GLsizei height,
 347                      const struct gl_pixelstore_attrib *unpack,
 348                      const GLubyte *bitmap)
 349 {
 350    struct intel_context *intel = intel_context(ctx);
 351    static const char *fp =
 352       "!!ARBfp1.0\n"
 353       "TEMP val;\n"
 354       "PARAM color=program.local[0];\n"
 355       "TEX val, fragment.texcoord[0], texture[0], 2D;\n"
 356       "ADD val, val.wwww, {-.5, -.5, -.5, -.5};\n"
 357       "KIL val;\n"
 358       "MOV result.color, color;\n"
 359       "END\n";
 360    GLuint texname;
 361    GLfloat vertices[4][4];
 362    GLint old_active_texture;
 363    GLubyte *a8_bitmap;
 364    GLfloat dst_z;
 365
 366    /* We need a fragment program for the KIL effect */
 367    if (!ctx->Extensions.ARB_fragment_program ||
 368        !ctx->Extensions.ARB_vertex_program) {
 369       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 370          fprintf(stderr,
 371                  "glBitmap fallback: No fragment/vertex program support\n");
 372       return GL_FALSE;
 373    }
 374
 375    /* We're going to mess with texturing with no regard to existing texture
 376     * state, so if there is some set up we have to bail.
 377     */
 378    if (ctx->Texture._EnabledUnits != 0) {
 379       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 380          fprintf(stderr, "glBitmap fallback: texturing enabled\n");
 381       return GL_FALSE;
 382    }
 383
 384    /* Can't do textured DrawPixels with a fragment program, unless we were
 385     * to generate a new program that sampled our texture and put the results
 386     * in the fragment color before the user's program started.
 387     */
 388    if (ctx->FragmentProgram.Enabled) {
 389       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 390          fprintf(stderr, "glBitmap fallback: fragment program enabled\n");
 391       return GL_FALSE;
 392    }
 393
 394    if (ctx->VertexProgram.Enabled) {
 395       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 396          fprintf(stderr, "glBitmap fallback: vertex program enabled\n");
 397       return GL_FALSE;
 398    }
 399
 400    if (!ctx->Extensions.ARB_texture_non_power_of_two &&
 401        (!is_power_of_two(width) || !is_power_of_two(height))) {
 402       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 403          fprintf(stderr,
 404                  "glBitmap() fallback: NPOT texture\n");
 405       return GL_FALSE;
 406    }
 407
 408    if (ctx->Fog.Enabled) {
 409       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 410          fprintf(stderr, "glBitmap() fallback: fog\n");
 411       return GL_FALSE;
 412    }
 413
 414    /* Check that we can load in a texture this big. */
 415    if (width > (1 << (ctx->Const.MaxTextureLevels - 1)) ||
 416        height > (1 << (ctx->Const.MaxTextureLevels - 1))) {
 417       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 418          fprintf(stderr, "glBitmap fallback: bitmap too large (%dx%d)\n",
 419                  width, height);
 420       return GL_FALSE;
 421    }
 422
 423    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 424       bitmap = map_pbo(ctx, width, height, unpack, bitmap);
 425       if (bitmap == NULL)
 426          return GL_TRUE;        /* even though this is an error, we're done */
 427    }
 428
 429    /* Convert the A1 bitmap to an A8 format suitable for glTexImage */
 430    a8_bitmap = _mesa_calloc(width * height);
 431    _mesa_expand_bitmap(width, height, unpack, bitmap, a8_bitmap, width, 0xff);
 432
 433    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 434       /* done with PBO so unmap it now */
 435       ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
 436                               unpack->BufferObj);
 437    }
 438
 439    /* Save GL state before we start setting up our drawing */
 440    _mesa_PushAttrib(GL_ENABLE_BIT | GL_CURRENT_BIT | GL_POLYGON_BIT |
 441                     GL_TEXTURE_BIT | GL_VIEWPORT_BIT);
 442    _mesa_PushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT |
 443                           GL_CLIENT_PIXEL_STORE_BIT);
 444    old_active_texture = ctx->Texture.CurrentUnit;
 445
 446    _mesa_Disable(GL_POLYGON_STIPPLE);
 447    _mesa_PolygonMode(GL_FRONT_AND_BACK, GL_FILL);
 448
 449    /* Upload our bitmap data to an alpha texture */
 450    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB);
 451    _mesa_Enable(GL_TEXTURE_2D);
 452    _mesa_GenTextures(1, &texname);
 453    _mesa_BindTexture(GL_TEXTURE_2D, texname);
 454    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 455    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 456
 457    _mesa_PixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
 458    _mesa_PixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE);
 459    _mesa_PixelStorei(GL_UNPACK_ROW_LENGTH, 0);
 460    _mesa_PixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
 461    _mesa_PixelStorei(GL_UNPACK_SKIP_ROWS, 0);
 462    _mesa_PixelStorei(GL_UNPACK_ALIGNMENT, 1);
 463    _mesa_TexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, width, height, 0,
 464                     GL_ALPHA, GL_UNSIGNED_BYTE, a8_bitmap);
 465    _mesa_free(a8_bitmap);
 466
 467    meta_set_fragment_program(&intel->meta, &intel->meta.bitmap_fp, fp);
 468    _mesa_ProgramLocalParameter4fvARB(GL_FRAGMENT_PROGRAM_ARB, 0,
 469                                      ctx->Current.RasterColor);
 470    meta_set_passthrough_vertex_program(&intel->meta);
 471    meta_set_passthrough_transform(&intel->meta);
 472
 473    /* convert rasterpos Z from [0,1] to NDC coord in [-1,1] */
 474    dst_z = -1.0 + 2.0 * ctx->Current.RasterPos[2];
 475
 476    /* RasterPos[2] already takes into account the DepthRange mapping. */
 477    _mesa_DepthRange(0.0, 1.0);
 478
 479    vertices[0][0] = dst_x;
 480    vertices[0][1] = dst_y;
 481    vertices[0][2] = dst_z;
 482    vertices[0][3] = 1.0;
 483    vertices[1][0] = dst_x + width;
 484    vertices[1][1] = dst_y;
 485    vertices[1][2] = dst_z;
 486    vertices[1][3] = 1.0;
 487    vertices[2][0] = dst_x + width;
 488    vertices[2][1] = dst_y + height;
 489    vertices[2][2] = dst_z;
 490    vertices[2][3] = 1.0;
 491    vertices[3][0] = dst_x;
 492    vertices[3][1] = dst_y + height;
 493    vertices[3][2] = dst_z;
 494    vertices[3][3] = 1.0;
 495
 496    _mesa_VertexPointer(4, GL_FLOAT, 4 * sizeof(GLfloat), &vertices);
 497    _mesa_Enable(GL_VERTEX_ARRAY);
 498    meta_set_default_texrect(&intel->meta);
 499    _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
 500
 501    meta_restore_texcoords(&intel->meta);
 502    meta_restore_transform(&intel->meta);
 503    meta_restore_fragment_program(&intel->meta);
 504    meta_restore_vertex_program(&intel->meta);
 505
 506    _mesa_PopClientAttrib();
 507    _mesa_PopAttrib();
 508
 509    _mesa_DeleteTextures(1, &texname);
 510
 511    return GL_TRUE;
 512 }
 513
 514 /* There are a large number of possible ways to implement bitmap on
 515  * this hardware, most of them have some sort of drawback.  Here are a
 516  * few that spring to mind:
 517  *
 518  * Blit:
 519  *    - XY_MONO_SRC_BLT_CMD
 520  *         - use XY_SETUP_CLIP_BLT for cliprect clipping.
 521  *    - XY_TEXT_BLT
 522  *    - XY_TEXT_IMMEDIATE_BLT
 523  *         - blit per cliprect, subject to maximum immediate data size.
 524  *    - XY_COLOR_BLT
 525  *         - per pixel or run of pixels
 526  *    - XY_PIXEL_BLT
 527  *         - good for sparse bitmaps
 528  *
 529  * 3D engine:
 530  *    - Point per pixel
 531  *    - Translate bitmap to an alpha texture and render as a quad
 532  *    - Chop bitmap up into 32x32 squares and render w/polygon stipple.
 533  */
 534 void
 535 intelBitmap(GLcontext * ctx,
 536             GLint x, GLint y,
 537             GLsizei width, GLsizei height,
 538             const struct gl_pixelstore_attrib *unpack,
 539             const GLubyte * pixels)
 540 {
 541    if (do_blit_bitmap(ctx, x, y, width, height,
 542                           unpack, pixels))
 543       return;
 544
 545    if (intel_texture_bitmap(ctx, x, y, width, height,
 546                             unpack, pixels))
 547       return;
 548
 549    if (INTEL_DEBUG & DEBUG_PIXEL)
 550       _mesa_printf("%s: fallback to swrast\n", __FUNCTION__);
 551
 552    _swrast_Bitmap(ctx, x, y, width, height, unpack, pixels);
 553 }