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/state.h"
  36 #include "swrast/swrast.h"
  37
  38 #include "intel_screen.h"
  39 #include "intel_context.h"
  40 #include "intel_batchbuffer.h"
  41 #include "intel_blit.h"
  42 #include "intel_regions.h"
  43 #include "intel_buffer_objects.h"
  44 #include "intel_buffers.h"
  45 #include "intel_pixel.h"
  46 #include "intel_reg.h"
  47
  48
  49 #define FILE_DEBUG_FLAG DEBUG_PIXEL
  50
  51
  52 /* Unlike the other intel_pixel_* functions, the expectation here is
  53  * that the incoming data is not in a PBO.  With the XY_TEXT blit
  54  * method, there's no benefit haveing it in a PBO, but we could
  55  * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit
  56  * PBO bitmaps.  I think they are probably pretty rare though - I
  57  * wonder if Xgl uses them?
  58  */
  59 static const GLubyte *map_pbo( GLcontext *ctx,
  60                                GLsizei width, GLsizei height,
  61                                const struct gl_pixelstore_attrib *unpack,
  62                                const GLubyte *bitmap )
  63 {
  64    GLubyte *buf;
  65
  66    if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
  67                                   GL_COLOR_INDEX, GL_BITMAP,
  68                                   (GLvoid *) bitmap)) {
  69       _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");
  70       return NULL;
  71    }
  72
  73    buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
  74                                            GL_READ_ONLY_ARB,
  75                                            unpack->BufferObj);
  76    if (!buf) {
  77       _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
  78       return NULL;
  79    }
  80
  81    return ADD_POINTERS(buf, bitmap);
  82 }
  83
  84 static GLboolean test_bit( const GLubyte *src,
  85                             GLuint bit )
  86 {
  87    return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0;
  88 }
  89
  90 static void set_bit( GLubyte *dest,
  91                           GLuint bit )
  92 {
  93    dest[bit/8] |= 1 << (bit % 8);
  94 }
  95
  96 /* Extract a rectangle's worth of data from the bitmap.  Called
  97  * per-cliprect.
  98  */
  99 static GLuint get_bitmap_rect(GLsizei width, GLsizei height,
 100                               const struct gl_pixelstore_attrib *unpack,
 101                               const GLubyte *bitmap,
 102                               GLuint x, GLuint y,
 103                               GLuint w, GLuint h,
 104                               GLubyte *dest,
 105                               GLuint row_align,
 106                               GLboolean invert)
 107 {
 108    GLuint src_offset = (x + unpack->SkipPixels) & 0x7;
 109    GLuint mask = unpack->LsbFirst ? 0 : 7;
 110    GLuint bit = 0;
 111    GLint row, col;
 112    GLint first, last;
 113    GLint incr;
 114    GLuint count = 0;
 115
 116    if (INTEL_DEBUG & DEBUG_PIXEL)
 117       _mesa_printf("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n",
 118                    __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask);
 119
 120    if (invert) {
 121       first = h-1;
 122       last = 0;
 123       incr = -1;
 124    }
 125    else {
 126       first = 0;
 127       last = h-1;
 128       incr = 1;
 129    }
 130
 131    /* Require that dest be pre-zero'd.
 132     */
 133    for (row = first; row != (last+incr); row += incr) {
 134       const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap,
 135                                                     width, height,
 136                                                     GL_COLOR_INDEX, GL_BITMAP,
 137                                                     y + row, x);
 138
 139       for (col = 0; col < w; col++, bit++) {
 140          if (test_bit(rowsrc, (col + src_offset) ^ mask)) {
 141             set_bit(dest, bit ^ 7);
 142             count++;
 143          }
 144       }
 145
 146       if (row_align)
 147          bit = ALIGN(bit, row_align);
 148    }
 149
 150    return count;
 151 }
 152
 153
 154
 155
 156 /*
 157  * Render a bitmap.
 158  */
 159 static GLboolean
 160 do_blit_bitmap( GLcontext *ctx,
 161                 GLint dstx, GLint dsty,
 162                 GLsizei width, GLsizei height,
 163                 const struct gl_pixelstore_attrib *unpack,
 164                 const GLubyte *bitmap )
 165 {
 166    struct intel_context *intel = intel_context(ctx);
 167    struct intel_region *dst = intel_drawbuf_region(intel);
 168    struct gl_framebuffer *fb = ctx->DrawBuffer;
 169    GLfloat tmpColor[4];
 170    GLubyte ubcolor[4];
 171    GLuint color8888, color565;
 172    unsigned int num_cliprects;
 173    drm_clip_rect_t *cliprects;
 174    int x_off, y_off;
 175
 176    /* Update draw buffer bounds */
 177    _mesa_update_state(ctx);
 178
 179    if (!dst)
 180        return GL_FALSE;
 181
 182    if (unpack->BufferObj->Name) {
 183       bitmap = map_pbo(ctx, width, height, unpack, bitmap);
 184       if (bitmap == NULL)
 185          return GL_TRUE;        /* even though this is an error, we're done */
 186    }
 187
 188    COPY_4V(tmpColor, ctx->Current.RasterColor);
 189
 190    if (NEED_SECONDARY_COLOR(ctx)) {
 191        ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor);
 192    }
 193
 194    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]);
 195    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]);
 196    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]);
 197    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]);
 198
 199    color8888 = INTEL_PACKCOLOR8888(ubcolor[0], ubcolor[1], ubcolor[2], ubcolor[3]);
 200    color565 = INTEL_PACKCOLOR565(ubcolor[0], ubcolor[1], ubcolor[2]);
 201
 202    if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F))
 203       return GL_FALSE;
 204
 205    LOCK_HARDWARE(intel);
 206
 207    intel_get_cliprects(intel, &cliprects, &num_cliprects, &x_off, &y_off);
 208    if (num_cliprects != 0) {
 209       drm_clip_rect_t dest_rect;
 210       GLint srcx = 0, srcy = 0;
 211       GLuint i;
 212       GLint orig_dstx = dstx;
 213       GLint orig_dsty = dsty;
 214
 215       /* Clip to buffer bounds and scissor. */
 216       if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
 217                                 fb->_Xmax, fb->_Ymax,
 218                                 &dstx, &dsty, &width, &height))
 219             goto out;
 220
 221       /* Convert from GL to hardware coordinates.  Transform original points
 222        * along with it so that we can look at cliprects in hw coordinates and
 223        * map back to points in the source space.
 224        */
 225       if (fb->Name == 0) {
 226          /* bitmap to a system framebuffer */
 227          dstx = x_off + dstx;
 228          dsty = y_off + (fb->Height - dsty - height);
 229          orig_dstx = x_off + orig_dstx;
 230          orig_dsty = y_off + (fb->Height - orig_dsty - height);
 231       } else {
 232          /* bitmap to a user framebuffer object */
 233          dstx = x_off + dstx;
 234          dsty = y_off + dsty;
 235          orig_dstx = x_off + orig_dstx;
 236          orig_dsty = y_off + orig_dsty;
 237       }
 238
 239       dest_rect.x1 = dstx;
 240       dest_rect.y1 = dsty;
 241       dest_rect.x2 = dstx + width;
 242       dest_rect.y2 = dsty + height;
 243
 244       for (i = 0; i < num_cliprects; i++) {
 245          drm_clip_rect_t rect;
 246          int box_w, box_h;
 247          GLint px, py;
 248          GLuint stipple[32];
 249
 250          if (!intel_intersect_cliprects(&rect, &dest_rect, &cliprects[i]))
 251             continue;
 252
 253          /* Now go back to GL coordinates to figure out what subset of
 254           * the bitmap we are uploading for this cliprect:
 255           */
 256          box_w = rect.x2 - rect.x1;
 257          box_h = rect.y2 - rect.y1;
 258          srcx = rect.x1 - orig_dstx;
 259          srcy = rect.y1 - orig_dsty;
 260
 261 #define DY 32
 262 #define DX 32
 263
 264          /* Then, finally, chop it all into chunks that can be
 265           * digested by hardware:
 266           */
 267          for (py = 0; py < box_h; py += DY) {
 268             for (px = 0; px < box_w; px += DX) {
 269                int h = MIN2(DY, box_h - py);
 270                int w = MIN2(DX, box_w - px);
 271                GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8;
 272                GLenum logic_op = ctx->Color.ColorLogicOpEnabled ?
 273                   ctx->Color.LogicOp : GL_COPY;
 274
 275                assert(sz <= sizeof(stipple));
 276                memset(stipple, 0, sz);
 277
 278                /* May need to adjust this when padding has been introduced in
 279                 * sz above:
 280                 */
 281                if (get_bitmap_rect(width, height, unpack,
 282                                    bitmap,
 283                                    srcx + px, srcy + py, w, h,
 284                                    (GLubyte *)stipple,
 285                                    8,
 286                                    fb->Name == 0 ? GL_TRUE : GL_FALSE) == 0)
 287                   continue;
 288
 289                /*
 290                 */
 291                intelEmitImmediateColorExpandBlit( intel,
 292                                                   dst->cpp,
 293                                                   (GLubyte *)stipple,
 294                                                   sz,
 295                                                   (dst->cpp == 2) ? color565 : color8888,
 296                                                   dst->pitch,
 297                                                   dst->buffer,
 298                                                   0,
 299                                                   dst->tiling,
 300                                                   rect.x1 + px,
 301                                                   rect.y2 - (py + h),
 302                                                   w, h,
 303                                                   logic_op);
 304             }
 305          }
 306       }
 307    }
 308 out:
 309    UNLOCK_HARDWARE(intel);
 310
 311    if (INTEL_DEBUG & DEBUG_SYNC)
 312       intel_batchbuffer_flush(intel->batch);
 313
 314    if (unpack->BufferObj->Name) {
 315       /* done with PBO so unmap it now */
 316       ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
 317                               unpack->BufferObj);
 318    }
 319
 320    return GL_TRUE;
 321 }
 322
 323
 324
 325
 326
 327 /* There are a large number of possible ways to implement bitmap on
 328  * this hardware, most of them have some sort of drawback.  Here are a
 329  * few that spring to mind:
 330  *
 331  * Blit:
 332  *    - XY_MONO_SRC_BLT_CMD
 333  *         - use XY_SETUP_CLIP_BLT for cliprect clipping.
 334  *    - XY_TEXT_BLT
 335  *    - XY_TEXT_IMMEDIATE_BLT
 336  *         - blit per cliprect, subject to maximum immediate data size.
 337  *    - XY_COLOR_BLT
 338  *         - per pixel or run of pixels
 339  *    - XY_PIXEL_BLT
 340  *         - good for sparse bitmaps
 341  *
 342  * 3D engine:
 343  *    - Point per pixel
 344  *    - Translate bitmap to an alpha texture and render as a quad
 345  *    - Chop bitmap up into 32x32 squares and render w/polygon stipple.
 346  */
 347 void
 348 intelBitmap(GLcontext * ctx,
 349             GLint x, GLint y,
 350             GLsizei width, GLsizei height,
 351             const struct gl_pixelstore_attrib *unpack,
 352             const GLubyte * pixels)
 353 {
 354    if (do_blit_bitmap(ctx, x, y, width, height,
 355                           unpack, pixels))
 356       return;
 357
 358    if (INTEL_DEBUG & DEBUG_PIXEL)
 359       _mesa_printf("%s: fallback to swrast\n", __FUNCTION__);
 360
 361    _swrast_Bitmap(ctx, x, y, width, height, unpack, pixels);
 362 }