src/mesa/drivers/dri/i965/intel_pixel_bitmap.c

   1 /*
   2  * Copyright 2006 VMware, Inc.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial portionsalloc
  15  * of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  21  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  22  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  23  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include "main/blend.h"
  27 #include "main/enums.h"
  28 #include "main/image.h"
  29 #include "main/colormac.h"
  30 #include "main/condrender.h"
  31 #include "main/mtypes.h"
  32 #include "main/macros.h"
  33 #include "main/pbo.h"
  34 #include "main/bufferobj.h"
  35 #include "main/state.h"
  36 #include "main/texobj.h"
  37 #include "main/context.h"
  38 #include "main/fbobject.h"
  39 #include "swrast/swrast.h"
  40 #include "drivers/common/meta.h"
  41
  42 #include "brw_context.h"
  43 #include "intel_screen.h"
  44 #include "intel_batchbuffer.h"
  45 #include "intel_blit.h"
  46 #include "intel_fbo.h"
  47 #include "intel_image.h"
  48 #include "intel_buffers.h"
  49 #include "intel_pixel.h"
  50
  51
  52 #define FILE_DEBUG_FLAG DEBUG_PIXEL
  53
  54
  55 /* Unlike the other intel_pixel_* functions, the expectation here is
  56  * that the incoming data is not in a PBO.  With the XY_TEXT blit
  57  * method, there's no benefit haveing it in a PBO, but we could
  58  * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit
  59  * PBO bitmaps.  I think they are probably pretty rare though - I
  60  * wonder if Xgl uses them?
  61  */
  62 static const GLubyte *map_pbo( struct gl_context *ctx,
  63                                GLsizei width, GLsizei height,
  64                                const struct gl_pixelstore_attrib *unpack,
  65                                const GLubyte *bitmap )
  66 {
  67    GLubyte *buf;
  68
  69    if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
  70                                   GL_COLOR_INDEX, GL_BITMAP,
  71                                   INT_MAX, (const GLvoid *) bitmap)) {
  72       _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");
  73       return NULL;
  74    }
  75
  76    buf = (GLubyte *) ctx->Driver.MapBufferRange(ctx, 0, unpack->BufferObj->Size,
  77                                                 GL_MAP_READ_BIT,
  78                                                 unpack->BufferObj,
  79                                                 MAP_INTERNAL);
  80    if (!buf) {
  81       _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
  82       return NULL;
  83    }
  84
  85    return ADD_POINTERS(buf, bitmap);
  86 }
  87
  88 static bool test_bit( const GLubyte *src, GLuint bit )
  89 {
  90    return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0;
  91 }
  92
  93 static void set_bit( GLubyte *dest, GLuint bit )
  94 {
  95    dest[bit/8] |= 1 << (bit % 8);
  96 }
  97
  98 /* Extract a rectangle's worth of data from the bitmap.  Called
  99  * per chunk of HW-sized bitmap.
 100  */
 101 static GLuint get_bitmap_rect(GLsizei width, GLsizei height,
 102                               const struct gl_pixelstore_attrib *unpack,
 103                               const GLubyte *bitmap,
 104                               GLuint x, GLuint y,
 105                               GLuint w, GLuint h,
 106                               GLubyte *dest,
 107                               GLuint row_align,
 108                               bool invert)
 109 {
 110    GLuint src_offset = (x + unpack->SkipPixels) & 0x7;
 111    GLuint mask = unpack->LsbFirst ? 0 : 7;
 112    GLuint bit = 0;
 113    GLint row, col;
 114    GLint first, last;
 115    GLint incr;
 116    GLuint count = 0;
 117
 118    DBG("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n",
 119        __func__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask);
 120
 121    if (invert) {
 122       first = h-1;
 123       last = 0;
 124       incr = -1;
 125    }
 126    else {
 127       first = 0;
 128       last = h-1;
 129       incr = 1;
 130    }
 131
 132    /* Require that dest be pre-zero'd.
 133     */
 134    for (row = first; row != (last+incr); row += incr) {
 135       const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap,
 136                                                     width, height,
 137                                                     GL_COLOR_INDEX, GL_BITMAP,
 138                                                     y + row, x);
 139
 140       for (col = 0; col < w; col++, bit++) {
 141          if (test_bit(rowsrc, (col + src_offset) ^ mask)) {
 142             set_bit(dest, bit ^ 7);
 143             count++;
 144          }
 145       }
 146
 147       if (row_align)
 148          bit = ALIGN(bit, row_align);
 149    }
 150
 151    return count;
 152 }
 153
 154 /**
 155  * Returns the low Y value of the vertical range given, flipped according to
 156  * whether the framebuffer is or not.
 157  */
 158 static inline int
 159 y_flip(struct gl_framebuffer *fb, int y, int height)
 160 {
 161    if (fb->FlipY)
 162       return fb->Height - y - height;
 163    else
 164       return y;
 165 }
 166
 167 /*
 168  * Render a bitmap.
 169  */
 170 static bool
 171 do_blit_bitmap( struct gl_context *ctx,
 172                 GLint dstx, GLint dsty,
 173                 GLsizei width, GLsizei height,
 174                 const struct gl_pixelstore_attrib *unpack,
 175                 const GLubyte *bitmap )
 176 {
 177    struct brw_context *brw = brw_context(ctx);
 178    struct gl_framebuffer *fb = ctx->DrawBuffer;
 179    struct intel_renderbuffer *irb;
 180    GLfloat tmpColor[4];
 181    GLubyte ubcolor[4];
 182    GLuint color;
 183    GLsizei bitmap_width = width;
 184    GLsizei bitmap_height = height;
 185    GLint px, py;
 186    GLuint stipple[32];
 187    GLint orig_dstx = dstx;
 188    GLint orig_dsty = dsty;
 189
 190    /* Update draw buffer bounds */
 191    _mesa_update_state(ctx);
 192
 193    if (ctx->Depth.Test) {
 194       /* The blit path produces incorrect results when depth testing is on.
 195        * It seems the blit Z coord is always 1.0 (the far plane) so fragments
 196        * will likely be obscured by other, closer geometry.
 197        */
 198       return false;
 199    }
 200
 201    intel_prepare_render(brw);
 202
 203    if (fb->_NumColorDrawBuffers != 1) {
 204       perf_debug("accelerated glBitmap() only supports rendering to a "
 205                  "single color buffer\n");
 206       return false;
 207    }
 208
 209    irb = intel_renderbuffer(fb->_ColorDrawBuffers[0]);
 210
 211    if (unpack->BufferObj) {
 212       bitmap = map_pbo(ctx, width, height, unpack, bitmap);
 213       if (bitmap == NULL)
 214          return true;   /* even though this is an error, we're done */
 215    }
 216
 217    COPY_4V(tmpColor, ctx->Current.RasterColor);
 218
 219    if (_mesa_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    switch (_mesa_get_render_format(ctx, intel_rb_format(irb))) {
 229    case MESA_FORMAT_B8G8R8A8_UNORM:
 230    case MESA_FORMAT_B8G8R8X8_UNORM:
 231       color = PACK_COLOR_8888(ubcolor[3], ubcolor[0], ubcolor[1], ubcolor[2]);
 232       break;
 233    case MESA_FORMAT_B5G6R5_UNORM:
 234       color = PACK_COLOR_565(ubcolor[0], ubcolor[1], ubcolor[2]);
 235       break;
 236    default:
 237       perf_debug("Unsupported format %s in accelerated glBitmap()\n",
 238                  _mesa_get_format_name(irb->mt->format));
 239       return false;
 240    }
 241
 242    if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F))
 243       return false;
 244
 245    /* Clip to buffer bounds and scissor. */
 246    if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
 247                              fb->_Xmax, fb->_Ymax,
 248                              &dstx, &dsty, &width, &height))
 249       goto out;
 250
 251    dsty = y_flip(fb, dsty, height);
 252
 253 #define DY 32
 254 #define DX 32
 255
 256    /* The blitter has no idea about fast color clears, so we need to resolve
 257     * the miptree before we do anything.
 258     */
 259    intel_miptree_access_raw(brw, irb->mt, irb->mt_level, irb->mt_layer, true);
 260
 261    /* Chop it all into chunks that can be digested by hardware: */
 262    for (py = 0; py < height; py += DY) {
 263       for (px = 0; px < width; px += DX) {
 264          int h = MIN2(DY, height - py);
 265          int w = MIN2(DX, width - px);
 266          GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8;
 267          const enum gl_logicop_mode logic_op = ctx->Color.ColorLogicOpEnabled ?
 268             ctx->Color._LogicOp : COLOR_LOGICOP_COPY;
 269
 270          assert(sz <= sizeof(stipple));
 271          memset(stipple, 0, sz);
 272
 273          /* May need to adjust this when padding has been introduced in
 274           * sz above:
 275           *
 276           * Have to translate destination coordinates back into source
 277           * coordinates.
 278           */
 279          int count = get_bitmap_rect(bitmap_width, bitmap_height, unpack,
 280                                      bitmap,
 281                                      -orig_dstx + (dstx + px),
 282                                      -orig_dsty + y_flip(fb, dsty + py, h),
 283                                      w, h,
 284                                      (GLubyte *)stipple,
 285                                      8,
 286                                      fb->FlipY);
 287          if (count == 0)
 288             continue;
 289
 290          if (!intelEmitImmediateColorExpandBlit(brw,
 291                                                 irb->mt->cpp,
 292                                                 (GLubyte *)stipple,
 293                                                 sz,
 294                                                 color,
 295                                                 irb->mt->surf.row_pitch_B,
 296                                                 irb->mt->bo,
 297                                                 irb->mt->offset,
 298                                                 irb->mt->surf.tiling,
 299                                                 dstx + px,
 300                                                 dsty + py,
 301                                                 w, h,
 302                                                 logic_op)) {
 303             return false;
 304          }
 305
 306          if (ctx->Query.CurrentOcclusionObject)
 307             ctx->Query.CurrentOcclusionObject->Result += count;
 308       }
 309    }
 310 out:
 311
 312    if (unlikely(INTEL_DEBUG & DEBUG_SYNC))
 313       intel_batchbuffer_flush(brw);
 314
 315    if (unpack->BufferObj) {
 316       /* done with PBO so unmap it now */
 317       ctx->Driver.UnmapBuffer(ctx, unpack->BufferObj, MAP_INTERNAL);
 318    }
 319
 320    return true;
 321 }
 322
 323
 324 /* There are a large number of possible ways to implement bitmap on
 325  * this hardware, most of them have some sort of drawback.  Here are a
 326  * few that spring to mind:
 327  *
 328  * Blit:
 329  *    - XY_MONO_SRC_BLT_CMD
 330  *         - use XY_SETUP_CLIP_BLT for cliprect clipping.
 331  *    - XY_TEXT_BLT
 332  *    - XY_TEXT_IMMEDIATE_BLT
 333  *         - blit per cliprect, subject to maximum immediate data size.
 334  *    - XY_COLOR_BLT
 335  *         - per pixel or run of pixels
 336  *    - XY_PIXEL_BLT
 337  *         - good for sparse bitmaps
 338  *
 339  * 3D engine:
 340  *    - Point per pixel
 341  *    - Translate bitmap to an alpha texture and render as a quad
 342  *    - Chop bitmap up into 32x32 squares and render w/polygon stipple.
 343  */
 344 void
 345 intelBitmap(struct gl_context * ctx,
 346             GLint x, GLint y,
 347             GLsizei width, GLsizei height,
 348             const struct gl_pixelstore_attrib *unpack,
 349             const GLubyte * pixels)
 350 {
 351    struct brw_context *brw = brw_context(ctx);
 352
 353    if (!_mesa_check_conditional_render(ctx))
 354       return;
 355
 356    if (brw->screen->devinfo.gen < 6 &&
 357        do_blit_bitmap(ctx, x, y, width, height, unpack, pixels))
 358       return;
 359
 360    _mesa_meta_Bitmap(ctx, x, y, width, height, unpack, pixels);
 361 }