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/glheader.h"
  28 #include "main/enums.h"
  29 #include "main/image.h"
  30 #include "main/colormac.h"
  31 #include "main/condrender.h"
  32 #include "main/mtypes.h"
  33 #include "main/macros.h"
  34 #include "main/pbo.h"
  35 #include "main/bufferobj.h"
  36 #include "main/state.h"
  37 #include "main/texobj.h"
  38 #include "main/context.h"
  39 #include "main/fbobject.h"
  40 #include "swrast/swrast.h"
  41 #include "drivers/common/meta.h"
  42
  43 #include "brw_context.h"
  44 #include "intel_screen.h"
  45 #include "intel_batchbuffer.h"
  46 #include "intel_blit.h"
  47 #include "intel_fbo.h"
  48 #include "intel_image.h"
  49 #include "intel_buffers.h"
  50 #include "intel_pixel.h"
  51 #include "intel_reg.h"
  52
  53
  54 #define FILE_DEBUG_FLAG DEBUG_PIXEL
  55
  56
  57 /* Unlike the other intel_pixel_* functions, the expectation here is
  58  * that the incoming data is not in a PBO.  With the XY_TEXT blit
  59  * method, there's no benefit haveing it in a PBO, but we could
  60  * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit
  61  * PBO bitmaps.  I think they are probably pretty rare though - I
  62  * wonder if Xgl uses them?
  63  */
  64 static const GLubyte *map_pbo( struct gl_context *ctx,
  65                                GLsizei width, GLsizei height,
  66                                const struct gl_pixelstore_attrib *unpack,
  67                                const GLubyte *bitmap )
  68 {
  69    GLubyte *buf;
  70
  71    if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
  72                                   GL_COLOR_INDEX, GL_BITMAP,
  73                                   INT_MAX, (const GLvoid *) bitmap)) {
  74       _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");
  75       return NULL;
  76    }
  77
  78    buf = (GLubyte *) ctx->Driver.MapBufferRange(ctx, 0, unpack->BufferObj->Size,
  79                                                 GL_MAP_READ_BIT,
  80                                                 unpack->BufferObj,
  81                                                 MAP_INTERNAL);
  82    if (!buf) {
  83       _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
  84       return NULL;
  85    }
  86
  87    return ADD_POINTERS(buf, bitmap);
  88 }
  89
  90 static bool test_bit( const GLubyte *src, GLuint bit )
  91 {
  92    return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0;
  93 }
  94
  95 static void set_bit( GLubyte *dest, GLuint bit )
  96 {
  97    dest[bit/8] |= 1 << (bit % 8);
  98 }
  99
 100 /* Extract a rectangle's worth of data from the bitmap.  Called
 101  * per chunk of HW-sized bitmap.
 102  */
 103 static GLuint get_bitmap_rect(GLsizei width, GLsizei height,
 104                               const struct gl_pixelstore_attrib *unpack,
 105                               const GLubyte *bitmap,
 106                               GLuint x, GLuint y,
 107                               GLuint w, GLuint h,
 108                               GLubyte *dest,
 109                               GLuint row_align,
 110                               bool invert)
 111 {
 112    GLuint src_offset = (x + unpack->SkipPixels) & 0x7;
 113    GLuint mask = unpack->LsbFirst ? 0 : 7;
 114    GLuint bit = 0;
 115    GLint row, col;
 116    GLint first, last;
 117    GLint incr;
 118    GLuint count = 0;
 119
 120    DBG("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n",
 121        __func__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask);
 122
 123    if (invert) {
 124       first = h-1;
 125       last = 0;
 126       incr = -1;
 127    }
 128    else {
 129       first = 0;
 130       last = h-1;
 131       incr = 1;
 132    }
 133
 134    /* Require that dest be pre-zero'd.
 135     */
 136    for (row = first; row != (last+incr); row += incr) {
 137       const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap,
 138                                                     width, height,
 139                                                     GL_COLOR_INDEX, GL_BITMAP,
 140                                                     y + row, x);
 141
 142       for (col = 0; col < w; col++, bit++) {
 143          if (test_bit(rowsrc, (col + src_offset) ^ mask)) {
 144             set_bit(dest, bit ^ 7);
 145             count++;
 146          }
 147       }
 148
 149       if (row_align)
 150          bit = ALIGN(bit, row_align);
 151    }
 152
 153    return count;
 154 }
 155
 156 /**
 157  * Returns the low Y value of the vertical range given, flipped according to
 158  * whether the framebuffer is or not.
 159  */
 160 static inline int
 161 y_flip(struct gl_framebuffer *fb, int y, int height)
 162 {
 163    if (_mesa_is_user_fbo(fb))
 164       return y;
 165    else
 166       return fb->Height - y - height;
 167 }
 168
 169 /*
 170  * Render a bitmap.
 171  */
 172 static bool
 173 do_blit_bitmap( struct gl_context *ctx,
 174                 GLint dstx, GLint dsty,
 175                 GLsizei width, GLsizei height,
 176                 const struct gl_pixelstore_attrib *unpack,
 177                 const GLubyte *bitmap )
 178 {
 179    struct brw_context *brw = brw_context(ctx);
 180    struct gl_framebuffer *fb = ctx->DrawBuffer;
 181    struct intel_renderbuffer *irb;
 182    GLfloat tmpColor[4];
 183    GLubyte ubcolor[4];
 184    GLuint color;
 185    GLsizei bitmap_width = width;
 186    GLsizei bitmap_height = height;
 187    GLint px, py;
 188    GLuint stipple[32];
 189    GLint orig_dstx = dstx;
 190    GLint orig_dsty = dsty;
 191
 192    /* Update draw buffer bounds */
 193    _mesa_update_state(ctx);
 194
 195    if (ctx->Depth.Test) {
 196       /* The blit path produces incorrect results when depth testing is on.
 197        * It seems the blit Z coord is always 1.0 (the far plane) so fragments
 198        * will likely be obscured by other, closer geometry.
 199        */
 200       return false;
 201    }
 202
 203    intel_prepare_render(brw);
 204
 205    if (fb->_NumColorDrawBuffers != 1) {
 206       perf_debug("accelerated glBitmap() only supports rendering to a "
 207                  "single color buffer\n");
 208       return false;
 209    }
 210
 211    irb = intel_renderbuffer(fb->_ColorDrawBuffers[0]);
 212
 213    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 214       bitmap = map_pbo(ctx, width, height, unpack, bitmap);
 215       if (bitmap == NULL)
 216          return true;   /* even though this is an error, we're done */
 217    }
 218
 219    COPY_4V(tmpColor, ctx->Current.RasterColor);
 220
 221    if (_mesa_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    switch (_mesa_get_render_format(ctx, intel_rb_format(irb))) {
 231    case MESA_FORMAT_B8G8R8A8_UNORM:
 232    case MESA_FORMAT_B8G8R8X8_UNORM:
 233       color = PACK_COLOR_8888(ubcolor[3], ubcolor[0], ubcolor[1], ubcolor[2]);
 234       break;
 235    case MESA_FORMAT_B5G6R5_UNORM:
 236       color = PACK_COLOR_565(ubcolor[0], ubcolor[1], ubcolor[2]);
 237       break;
 238    default:
 239       perf_debug("Unsupported format %s in accelerated glBitmap()\n",
 240                  _mesa_get_format_name(irb->mt->format));
 241       return false;
 242    }
 243
 244    if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F))
 245       return false;
 246
 247    /* Clip to buffer bounds and scissor. */
 248    if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
 249                              fb->_Xmax, fb->_Ymax,
 250                              &dstx, &dsty, &width, &height))
 251       goto out;
 252
 253    dsty = y_flip(fb, dsty, height);
 254
 255 #define DY 32
 256 #define DX 32
 257
 258    /* The blitter has no idea about fast color clears, so we need to resolve
 259     * the miptree before we do anything.
 260     */
 261    intel_miptree_resolve_color(brw, irb->mt);
 262
 263    /* Chop it all into chunks that can be digested by hardware: */
 264    for (py = 0; py < height; py += DY) {
 265       for (px = 0; px < width; px += DX) {
 266          int h = MIN2(DY, height - py);
 267          int w = MIN2(DX, width - px);
 268          GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8;
 269          GLenum logic_op = ctx->Color.ColorLogicOpEnabled ?
 270             ctx->Color.LogicOp : GL_COPY;
 271
 272          assert(sz <= sizeof(stipple));
 273          memset(stipple, 0, sz);
 274
 275          /* May need to adjust this when padding has been introduced in
 276           * sz above:
 277           *
 278           * Have to translate destination coordinates back into source
 279           * coordinates.
 280           */
 281          int count = get_bitmap_rect(bitmap_width, bitmap_height, unpack,
 282                                      bitmap,
 283                                      -orig_dstx + (dstx + px),
 284                                      -orig_dsty + y_flip(fb, dsty + py, h),
 285                                      w, h,
 286                                      (GLubyte *)stipple,
 287                                      8,
 288                                      _mesa_is_winsys_fbo(fb));
 289          if (count == 0)
 290             continue;
 291
 292          if (!intelEmitImmediateColorExpandBlit(brw,
 293                                                 irb->mt->cpp,
 294                                                 (GLubyte *)stipple,
 295                                                 sz,
 296                                                 color,
 297                                                 irb->mt->pitch,
 298                                                 irb->mt->bo,
 299                                                 0,
 300                                                 irb->mt->tiling,
 301                                                 dstx + px,
 302                                                 dsty + py,
 303                                                 w, h,
 304                                                 logic_op)) {
 305             return false;
 306          }
 307
 308          if (ctx->Query.CurrentOcclusionObject)
 309             ctx->Query.CurrentOcclusionObject->Result += count;
 310       }
 311    }
 312 out:
 313
 314    if (unlikely(INTEL_DEBUG & DEBUG_SYNC))
 315       intel_batchbuffer_flush(brw);
 316
 317    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 318       /* done with PBO so unmap it now */
 319       ctx->Driver.UnmapBuffer(ctx, unpack->BufferObj, MAP_INTERNAL);
 320    }
 321
 322    return true;
 323 }
 324
 325
 326 /* There are a large number of possible ways to implement bitmap on
 327  * this hardware, most of them have some sort of drawback.  Here are a
 328  * few that spring to mind:
 329  *
 330  * Blit:
 331  *    - XY_MONO_SRC_BLT_CMD
 332  *         - use XY_SETUP_CLIP_BLT for cliprect clipping.
 333  *    - XY_TEXT_BLT
 334  *    - XY_TEXT_IMMEDIATE_BLT
 335  *         - blit per cliprect, subject to maximum immediate data size.
 336  *    - XY_COLOR_BLT
 337  *         - per pixel or run of pixels
 338  *    - XY_PIXEL_BLT
 339  *         - good for sparse bitmaps
 340  *
 341  * 3D engine:
 342  *    - Point per pixel
 343  *    - Translate bitmap to an alpha texture and render as a quad
 344  *    - Chop bitmap up into 32x32 squares and render w/polygon stipple.
 345  */
 346 void
 347 intelBitmap(struct gl_context * ctx,
 348             GLint x, GLint y,
 349             GLsizei width, GLsizei height,
 350             const struct gl_pixelstore_attrib *unpack,
 351             const GLubyte * pixels)
 352 {
 353    if (!_mesa_check_conditional_render(ctx))
 354       return;
 355
 356    if (do_blit_bitmap(ctx, x, y, width, height,
 357                           unpack, pixels))
 358       return;
 359
 360    _mesa_meta_Bitmap(ctx, x, y, width, height, unpack, pixels);
 361 }