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 "swrast/swrast.h"
  36
  37 #include "intel_screen.h"
  38 #include "intel_context.h"
  39 #include "intel_batchbuffer.h"
  40 #include "intel_blit.h"
  41 #include "intel_regions.h"
  42 #include "intel_buffer_objects.h"
  43 #include "intel_buffers.h"
  44 #include "intel_pixel.h"
  45 #include "intel_reg.h"
  46
  47
  48 #define FILE_DEBUG_FLAG DEBUG_PIXEL
  49
  50
  51 /* Unlike the other intel_pixel_* functions, the expectation here is
  52  * that the incoming data is not in a PBO.  With the XY_TEXT blit
  53  * method, there's no benefit haveing it in a PBO, but we could
  54  * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit
  55  * PBO bitmaps.  I think they are probably pretty rare though - I
  56  * wonder if Xgl uses them?
  57  */
  58 static const GLubyte *map_pbo( GLcontext *ctx,
  59                                GLsizei width, GLsizei height,
  60                                const struct gl_pixelstore_attrib *unpack,
  61                                const GLubyte *bitmap )
  62 {
  63    GLubyte *buf;
  64
  65    if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
  66                                   GL_COLOR_INDEX, GL_BITMAP,
  67                                   (GLvoid *) bitmap)) {
  68       _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");
  69       return NULL;
  70    }
  71
  72    buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
  73                                            GL_READ_ONLY_ARB,
  74                                            unpack->BufferObj);
  75    if (!buf) {
  76       _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
  77       return NULL;
  78    }
  79
  80    return ADD_POINTERS(buf, bitmap);
  81 }
  82
  83 static GLboolean test_bit( const GLubyte *src,
  84                             GLuint bit )
  85 {
  86    return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0;
  87 }
  88
  89 static void set_bit( GLubyte *dest,
  90                           GLuint bit )
  91 {
  92    dest[bit/8] |= 1 << (bit % 8);
  93 }
  94
  95 /* Extract a rectangle's worth of data from the bitmap.  Called
  96  * per-cliprect.
  97  */
  98 static GLuint get_bitmap_rect(GLsizei width, GLsizei height,
  99                               const struct gl_pixelstore_attrib *unpack,
 100                               const GLubyte *bitmap,
 101                               GLuint x, GLuint y,
 102                               GLuint w, GLuint h,
 103                               GLubyte *dest,
 104                               GLuint row_align,
 105                               GLboolean invert)
 106 {
 107    GLuint src_offset = (x + unpack->SkipPixels) & 0x7;
 108    GLuint mask = unpack->LsbFirst ? 0 : 7;
 109    GLuint bit = 0;
 110    GLint row, col;
 111    GLint first, last;
 112    GLint incr;
 113    GLuint count = 0;
 114
 115    if (INTEL_DEBUG & DEBUG_PIXEL)
 116       _mesa_printf("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n",
 117                    __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask);
 118
 119    if (invert) {
 120       first = h-1;
 121       last = 0;
 122       incr = -1;
 123    }
 124    else {
 125       first = 0;
 126       last = h-1;
 127       incr = 1;
 128    }
 129
 130    /* Require that dest be pre-zero'd.
 131     */
 132    for (row = first; row != (last+incr); row += incr) {
 133       const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap,
 134                                                     width, height,
 135                                                     GL_COLOR_INDEX, GL_BITMAP,
 136                                                     y + row, x);
 137
 138       for (col = 0; col < w; col++, bit++) {
 139          if (test_bit(rowsrc, (col + src_offset) ^ mask)) {
 140             set_bit(dest, bit ^ 7);
 141             count++;
 142          }
 143       }
 144
 145       if (row_align)
 146          bit = ALIGN(bit, row_align);
 147    }
 148
 149    return count;
 150 }
 151
 152
 153
 154
 155 /*
 156  * Render a bitmap.
 157  */
 158 static GLboolean
 159 do_blit_bitmap( GLcontext *ctx,
 160                 GLint dstx, GLint dsty,
 161                 GLsizei width, GLsizei height,
 162                 const struct gl_pixelstore_attrib *unpack,
 163                 const GLubyte *bitmap )
 164 {
 165    struct intel_context *intel = intel_context(ctx);
 166    struct intel_region *dst = intel_drawbuf_region(intel);
 167    GLfloat tmpColor[4];
 168    GLubyte ubcolor[4];
 169    GLuint color8888, color565;
 170
 171    if (!dst)
 172        return GL_FALSE;
 173
 174    if (unpack->BufferObj->Name) {
 175       bitmap = map_pbo(ctx, width, height, unpack, bitmap);
 176       if (bitmap == NULL)
 177          return GL_TRUE;        /* even though this is an error, we're done */
 178    }
 179
 180    COPY_4V(tmpColor, ctx->Current.RasterColor);
 181
 182    if (NEED_SECONDARY_COLOR(ctx)) {
 183        ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor);
 184    }
 185
 186    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]);
 187    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]);
 188    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]);
 189    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]);
 190
 191    color8888 = INTEL_PACKCOLOR8888(ubcolor[0], ubcolor[1], ubcolor[2], ubcolor[3]);
 192    color565 = INTEL_PACKCOLOR565(ubcolor[0], ubcolor[1], ubcolor[2]);
 193
 194    if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F))
 195       return GL_FALSE;
 196
 197    LOCK_HARDWARE(intel);
 198
 199    if (intel->driDrawable->numClipRects) {
 200       __DRIdrawablePrivate *dPriv = intel->driDrawable;
 201       drm_clip_rect_t *box = dPriv->pClipRects;
 202       drm_clip_rect_t dest_rect;
 203       GLint nbox = dPriv->numClipRects;
 204       GLint srcx = 0, srcy = 0;
 205       GLint orig_screen_x1, orig_screen_y2;
 206       GLuint i;
 207
 208
 209       orig_screen_x1 = dPriv->x + dstx;
 210       orig_screen_y2 = dPriv->y + (dPriv->h - dsty);
 211
 212       /* Do scissoring in GL coordinates:
 213        */
 214       if (ctx->Scissor.Enabled)
 215       {
 216          GLint x = ctx->Scissor.X;
 217          GLint y = ctx->Scissor.Y;
 218          GLuint w = ctx->Scissor.Width;
 219          GLuint h = ctx->Scissor.Height;
 220
 221          if (!_mesa_clip_to_region(x, y, x+w-1, y+h-1, &dstx, &dsty, &width, &height))
 222             goto out;
 223       }
 224
 225       /* Convert from GL to hardware coordinates:
 226        */
 227       dsty = dPriv->y + (dPriv->h - dsty - height);
 228       dstx = dPriv->x + dstx;
 229
 230       dest_rect.x1 = dstx < 0 ? 0 : dstx;
 231       dest_rect.y1 = dsty < 0 ? 0 : dsty;
 232       dest_rect.x2 = dstx + width < 0 ? 0 : dstx + width;
 233       dest_rect.y2 = dsty + height < 0 ? 0 : dsty + height;
 234
 235       for (i = 0; i < nbox; i++) {
 236          drm_clip_rect_t rect;
 237          int box_w, box_h;
 238          GLint px, py;
 239          GLuint stipple[32];
 240
 241          if (!intel_intersect_cliprects(&rect, &dest_rect, &box[i]))
 242             continue;
 243
 244          /* Now go back to GL coordinates to figure out what subset of
 245           * the bitmap we are uploading for this cliprect:
 246           */
 247          box_w = rect.x2 - rect.x1;
 248          box_h = rect.y2 - rect.y1;
 249          srcx = rect.x1 - orig_screen_x1;
 250          srcy = orig_screen_y2 - rect.y2;
 251
 252
 253 #define DY 32
 254 #define DX 32
 255
 256          /* Then, finally, chop it all into chunks that can be
 257           * digested by hardware:
 258           */
 259          for (py = 0; py < box_h; py += DY) {
 260             for (px = 0; px < box_w; px += DX) {
 261                int h = MIN2(DY, box_h - py);
 262                int w = MIN2(DX, box_w - px);
 263                GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8;
 264                GLenum logic_op = ctx->Color.ColorLogicOpEnabled ?
 265                   ctx->Color.LogicOp : GL_COPY;
 266
 267                assert(sz <= sizeof(stipple));
 268                memset(stipple, 0, sz);
 269
 270                /* May need to adjust this when padding has been introduced in
 271                 * sz above:
 272                 */
 273                if (get_bitmap_rect(width, height, unpack,
 274                                    bitmap,
 275                                    srcx + px, srcy + py, w, h,
 276                                    (GLubyte *)stipple,
 277                                    8,
 278                                    GL_TRUE) == 0)
 279                   continue;
 280
 281                /*
 282                 */
 283                intelEmitImmediateColorExpandBlit( intel,
 284                                                   dst->cpp,
 285                                                   (GLubyte *)stipple,
 286                                                   sz,
 287                                                   (dst->cpp == 2) ? color565 : color8888,
 288                                                   dst->pitch,
 289                                                   dst->buffer,
 290                                                   0,
 291                                                   dst->tiling,
 292                                                   rect.x1 + px,
 293                                                   rect.y2 - (py + h),
 294                                                   w, h,
 295                                                   logic_op);
 296             }
 297          }
 298       }
 299    }
 300 out:
 301    UNLOCK_HARDWARE(intel);
 302
 303
 304    if (unpack->BufferObj->Name) {
 305       /* done with PBO so unmap it now */
 306       ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
 307                               unpack->BufferObj);
 308    }
 309
 310    return GL_TRUE;
 311 }
 312
 313
 314
 315
 316
 317 /* There are a large number of possible ways to implement bitmap on
 318  * this hardware, most of them have some sort of drawback.  Here are a
 319  * few that spring to mind:
 320  *
 321  * Blit:
 322  *    - XY_MONO_SRC_BLT_CMD
 323  *         - use XY_SETUP_CLIP_BLT for cliprect clipping.
 324  *    - XY_TEXT_BLT
 325  *    - XY_TEXT_IMMEDIATE_BLT
 326  *         - blit per cliprect, subject to maximum immediate data size.
 327  *    - XY_COLOR_BLT
 328  *         - per pixel or run of pixels
 329  *    - XY_PIXEL_BLT
 330  *         - good for sparse bitmaps
 331  *
 332  * 3D engine:
 333  *    - Point per pixel
 334  *    - Translate bitmap to an alpha texture and render as a quad
 335  *    - Chop bitmap up into 32x32 squares and render w/polygon stipple.
 336  */
 337 void
 338 intelBitmap(GLcontext * ctx,
 339             GLint x, GLint y,
 340             GLsizei width, GLsizei height,
 341             const struct gl_pixelstore_attrib *unpack,
 342             const GLubyte * pixels)
 343 {
 344    if (do_blit_bitmap(ctx, x, y, width, height,
 345                           unpack, pixels))
 346       return;
 347
 348    if (INTEL_DEBUG & DEBUG_PIXEL)
 349       _mesa_printf("%s: fallback to swrast\n", __FUNCTION__);
 350
 351    _swrast_Bitmap(ctx, x, y, width, height, unpack, pixels);
 352 }