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 #include "intel_reg.h"
  51
  52
  53 #define FILE_DEBUG_FLAG DEBUG_PIXEL
  54
  55
  56 /* Unlike the other intel_pixel_* functions, the expectation here is
  57  * that the incoming data is not in a PBO.  With the XY_TEXT blit
  58  * method, there's no benefit haveing it in a PBO, but we could
  59  * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit
  60  * PBO bitmaps.  I think they are probably pretty rare though - I
  61  * wonder if Xgl uses them?
  62  */
  63 static const GLubyte *map_pbo( struct gl_context *ctx,
  64                                GLsizei width, GLsizei height,
  65                                const struct gl_pixelstore_attrib *unpack,
  66                                const GLubyte *bitmap )
  67 {
  68    GLubyte *buf;
  69
  70    if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
  71                                   GL_COLOR_INDEX, GL_BITMAP,
  72                                   INT_MAX, (const GLvoid *) bitmap)) {
  73       _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");
  74       return NULL;
  75    }
  76
  77    buf = (GLubyte *) ctx->Driver.MapBufferRange(ctx, 0, unpack->BufferObj->Size,
  78                                                 GL_MAP_READ_BIT,
  79                                                 unpack->BufferObj,
  80                                                 MAP_INTERNAL);
  81    if (!buf) {
  82       _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
  83       return NULL;
  84    }
  85
  86    return ADD_POINTERS(buf, bitmap);
  87 }
  88
  89 static bool test_bit( const GLubyte *src, GLuint bit )
  90 {
  91    return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0;
  92 }
  93
  94 static void set_bit( GLubyte *dest, GLuint bit )
  95 {
  96    dest[bit/8] |= 1 << (bit % 8);
  97 }
  98
  99 /* Extract a rectangle's worth of data from the bitmap.  Called
 100  * per chunk of HW-sized bitmap.
 101  */
 102 static GLuint get_bitmap_rect(GLsizei width, GLsizei height,
 103                               const struct gl_pixelstore_attrib *unpack,
 104                               const GLubyte *bitmap,
 105                               GLuint x, GLuint y,
 106                               GLuint w, GLuint h,
 107                               GLubyte *dest,
 108                               GLuint row_align,
 109                               bool invert)
 110 {
 111    GLuint src_offset = (x + unpack->SkipPixels) & 0x7;
 112    GLuint mask = unpack->LsbFirst ? 0 : 7;
 113    GLuint bit = 0;
 114    GLint row, col;
 115    GLint first, last;
 116    GLint incr;
 117    GLuint count = 0;
 118
 119    DBG("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n",
 120        __func__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask);
 121
 122    if (invert) {
 123       first = h-1;
 124       last = 0;
 125       incr = -1;
 126    }
 127    else {
 128       first = 0;
 129       last = h-1;
 130       incr = 1;
 131    }
 132
 133    /* Require that dest be pre-zero'd.
 134     */
 135    for (row = first; row != (last+incr); row += incr) {
 136       const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap,
 137                                                     width, height,
 138                                                     GL_COLOR_INDEX, GL_BITMAP,
 139                                                     y + row, x);
 140
 141       for (col = 0; col < w; col++, bit++) {
 142          if (test_bit(rowsrc, (col + src_offset) ^ mask)) {
 143             set_bit(dest, bit ^ 7);
 144             count++;
 145          }
 146       }
 147
 148       if (row_align)
 149          bit = ALIGN(bit, row_align);
 150    }
 151
 152    return count;
 153 }
 154
 155 /**
 156  * Returns the low Y value of the vertical range given, flipped according to
 157  * whether the framebuffer is or not.
 158  */
 159 static inline int
 160 y_flip(struct gl_framebuffer *fb, int y, int height)
 161 {
 162    if (_mesa_is_user_fbo(fb))
 163       return y;
 164    else
 165       return fb->Height - y - height;
 166 }
 167
 168 /*
 169  * Render a bitmap.
 170  */
 171 static bool
 172 do_blit_bitmap( struct gl_context *ctx,
 173                 GLint dstx, GLint dsty,
 174                 GLsizei width, GLsizei height,
 175                 const struct gl_pixelstore_attrib *unpack,
 176                 const GLubyte *bitmap )
 177 {
 178    struct brw_context *brw = brw_context(ctx);
 179    struct gl_framebuffer *fb = ctx->DrawBuffer;
 180    struct intel_renderbuffer *irb;
 181    GLfloat tmpColor[4];
 182    GLubyte ubcolor[4];
 183    GLuint color;
 184    GLsizei bitmap_width = width;
 185    GLsizei bitmap_height = height;
 186    GLint px, py;
 187    GLuint stipple[32];
 188    GLint orig_dstx = dstx;
 189    GLint orig_dsty = dsty;
 190
 191    /* Update draw buffer bounds */
 192    _mesa_update_state(ctx);
 193
 194    if (ctx->Depth.Test) {
 195       /* The blit path produces incorrect results when depth testing is on.
 196        * It seems the blit Z coord is always 1.0 (the far plane) so fragments
 197        * will likely be obscured by other, closer geometry.
 198        */
 199       return false;
 200    }
 201
 202    intel_prepare_render(brw);
 203
 204    if (fb->_NumColorDrawBuffers != 1) {
 205       perf_debug("accelerated glBitmap() only supports rendering to a "
 206                  "single color buffer\n");
 207       return false;
 208    }
 209
 210    irb = intel_renderbuffer(fb->_ColorDrawBuffers[0]);
 211
 212    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 213       bitmap = map_pbo(ctx, width, height, unpack, bitmap);
 214       if (bitmap == NULL)
 215          return true;   /* even though this is an error, we're done */
 216    }
 217
 218    COPY_4V(tmpColor, ctx->Current.RasterColor);
 219
 220    if (_mesa_need_secondary_color(ctx)) {
 221        ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor);
 222    }
 223
 224    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]);
 225    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]);
 226    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]);
 227    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]);
 228
 229    switch (_mesa_get_render_format(ctx, intel_rb_format(irb))) {
 230    case MESA_FORMAT_B8G8R8A8_UNORM:
 231    case MESA_FORMAT_B8G8R8X8_UNORM:
 232       color = PACK_COLOR_8888(ubcolor[3], ubcolor[0], ubcolor[1], ubcolor[2]);
 233       break;
 234    case MESA_FORMAT_B5G6R5_UNORM:
 235       color = PACK_COLOR_565(ubcolor[0], ubcolor[1], ubcolor[2]);
 236       break;
 237    default:
 238       perf_debug("Unsupported format %s in accelerated glBitmap()\n",
 239                  _mesa_get_format_name(irb->mt->format));
 240       return false;
 241    }
 242
 243    if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F))
 244       return false;
 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    dsty = y_flip(fb, dsty, height);
 253
 254 #define DY 32
 255 #define DX 32
 256
 257    /* The blitter has no idea about fast color clears, so we need to resolve
 258     * the miptree before we do anything.
 259     */
 260    intel_miptree_resolve_color(brw, irb->mt);
 261
 262    /* Chop it all into chunks that can be digested by hardware: */
 263    for (py = 0; py < height; py += DY) {
 264       for (px = 0; px < width; px += DX) {
 265          int h = MIN2(DY, height - py);
 266          int w = MIN2(DX, width - px);
 267          GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8;
 268          GLenum logic_op = ctx->Color.ColorLogicOpEnabled ?
 269             ctx->Color.LogicOp : GL_COPY;
 270
 271          assert(sz <= sizeof(stipple));
 272          memset(stipple, 0, sz);
 273
 274          /* May need to adjust this when padding has been introduced in
 275           * sz above:
 276           *
 277           * Have to translate destination coordinates back into source
 278           * coordinates.
 279           */
 280          int count = get_bitmap_rect(bitmap_width, bitmap_height, unpack,
 281                                      bitmap,
 282                                      -orig_dstx + (dstx + px),
 283                                      -orig_dsty + y_flip(fb, dsty + py, h),
 284                                      w, h,
 285                                      (GLubyte *)stipple,
 286                                      8,
 287                                      _mesa_is_winsys_fbo(fb));
 288          if (count == 0)
 289             continue;
 290
 291          if (!intelEmitImmediateColorExpandBlit(brw,
 292                                                 irb->mt->cpp,
 293                                                 (GLubyte *)stipple,
 294                                                 sz,
 295                                                 color,
 296                                                 irb->mt->pitch,
 297                                                 irb->mt->bo,
 298                                                 0,
 299                                                 irb->mt->tiling,
 300                                                 dstx + px,
 301                                                 dsty + py,
 302                                                 w, h,
 303                                                 logic_op)) {
 304             return false;
 305          }
 306
 307          if (ctx->Query.CurrentOcclusionObject)
 308             ctx->Query.CurrentOcclusionObject->Result += count;
 309       }
 310    }
 311 out:
 312
 313    if (unlikely(INTEL_DEBUG & DEBUG_SYNC))
 314       intel_batchbuffer_flush(brw);
 315
 316    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 317       /* done with PBO so unmap it now */
 318       ctx->Driver.UnmapBuffer(ctx, unpack->BufferObj, MAP_INTERNAL);
 319    }
 320
 321    return true;
 322 }
 323
 324
 325 /* There are a large number of possible ways to implement bitmap on
 326  * this hardware, most of them have some sort of drawback.  Here are a
 327  * few that spring to mind:
 328  *
 329  * Blit:
 330  *    - XY_MONO_SRC_BLT_CMD
 331  *         - use XY_SETUP_CLIP_BLT for cliprect clipping.
 332  *    - XY_TEXT_BLT
 333  *    - XY_TEXT_IMMEDIATE_BLT
 334  *         - blit per cliprect, subject to maximum immediate data size.
 335  *    - XY_COLOR_BLT
 336  *         - per pixel or run of pixels
 337  *    - XY_PIXEL_BLT
 338  *         - good for sparse bitmaps
 339  *
 340  * 3D engine:
 341  *    - Point per pixel
 342  *    - Translate bitmap to an alpha texture and render as a quad
 343  *    - Chop bitmap up into 32x32 squares and render w/polygon stipple.
 344  */
 345 void
 346 intelBitmap(struct gl_context * ctx,
 347             GLint x, GLint y,
 348             GLsizei width, GLsizei height,
 349             const struct gl_pixelstore_attrib *unpack,
 350             const GLubyte * pixels)
 351 {
 352    if (!_mesa_check_conditional_render(ctx))
 353       return;
 354
 355    if (do_blit_bitmap(ctx, x, y, width, height,
 356                           unpack, pixels))
 357       return;
 358
 359    _mesa_meta_Bitmap(ctx, x, y, width, height, unpack, pixels);
 360 }