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

   1 /**************************************************************************
   2  *
   3  * Copyright 2006 VMware, Inc.
   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 VMWARE 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/blend.h"
  29 #include "main/glheader.h"
  30 #include "main/enums.h"
  31 #include "main/image.h"
  32 #include "main/colormac.h"
  33 #include "main/condrender.h"
  34 #include "main/mtypes.h"
  35 #include "main/macros.h"
  36 #include "main/pbo.h"
  37 #include "main/bufferobj.h"
  38 #include "main/state.h"
  39 #include "main/texobj.h"
  40 #include "main/context.h"
  41 #include "main/fbobject.h"
  42 #include "swrast/swrast.h"
  43 #include "drivers/common/meta.h"
  44
  45 #include "brw_context.h"
  46 #include "intel_screen.h"
  47 #include "intel_batchbuffer.h"
  48 #include "intel_blit.h"
  49 #include "intel_fbo.h"
  50 #include "intel_regions.h"
  51 #include "intel_buffers.h"
  52 #include "intel_pixel.h"
  53 #include "intel_reg.h"
  54
  55
  56 #define FILE_DEBUG_FLAG DEBUG_PIXEL
  57
  58
  59 /* Unlike the other intel_pixel_* functions, the expectation here is
  60  * that the incoming data is not in a PBO.  With the XY_TEXT blit
  61  * method, there's no benefit haveing it in a PBO, but we could
  62  * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit
  63  * PBO bitmaps.  I think they are probably pretty rare though - I
  64  * wonder if Xgl uses them?
  65  */
  66 static const GLubyte *map_pbo( struct gl_context *ctx,
  67                                GLsizei width, GLsizei height,
  68                                const struct gl_pixelstore_attrib *unpack,
  69                                const GLubyte *bitmap )
  70 {
  71    GLubyte *buf;
  72
  73    if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
  74                                   GL_COLOR_INDEX, GL_BITMAP,
  75                                   INT_MAX, (const GLvoid *) bitmap)) {
  76       _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");
  77       return NULL;
  78    }
  79
  80    buf = (GLubyte *) ctx->Driver.MapBufferRange(ctx, 0, unpack->BufferObj->Size,
  81                                                 GL_MAP_READ_BIT,
  82                                                 unpack->BufferObj);
  83    if (!buf) {
  84       _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
  85       return NULL;
  86    }
  87
  88    return ADD_POINTERS(buf, bitmap);
  89 }
  90
  91 static bool test_bit( const GLubyte *src, GLuint bit )
  92 {
  93    return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0;
  94 }
  95
  96 static void set_bit( GLubyte *dest, GLuint bit )
  97 {
  98    dest[bit/8] |= 1 << (bit % 8);
  99 }
 100
 101 /* Extract a rectangle's worth of data from the bitmap.  Called
 102  * per chunk of HW-sized bitmap.
 103  */
 104 static GLuint get_bitmap_rect(GLsizei width, GLsizei height,
 105                               const struct gl_pixelstore_attrib *unpack,
 106                               const GLubyte *bitmap,
 107                               GLuint x, GLuint y,
 108                               GLuint w, GLuint h,
 109                               GLubyte *dest,
 110                               GLuint row_align,
 111                               bool invert)
 112 {
 113    GLuint src_offset = (x + unpack->SkipPixels) & 0x7;
 114    GLuint mask = unpack->LsbFirst ? 0 : 7;
 115    GLuint bit = 0;
 116    GLint row, col;
 117    GLint first, last;
 118    GLint incr;
 119    GLuint count = 0;
 120
 121    DBG("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n",
 122        __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask);
 123
 124    if (invert) {
 125       first = h-1;
 126       last = 0;
 127       incr = -1;
 128    }
 129    else {
 130       first = 0;
 131       last = h-1;
 132       incr = 1;
 133    }
 134
 135    /* Require that dest be pre-zero'd.
 136     */
 137    for (row = first; row != (last+incr); row += incr) {
 138       const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap,
 139                                                     width, height,
 140                                                     GL_COLOR_INDEX, GL_BITMAP,
 141                                                     y + row, x);
 142
 143       for (col = 0; col < w; col++, bit++) {
 144          if (test_bit(rowsrc, (col + src_offset) ^ mask)) {
 145             set_bit(dest, bit ^ 7);
 146             count++;
 147          }
 148       }
 149
 150       if (row_align)
 151          bit = ALIGN(bit, row_align);
 152    }
 153
 154    return count;
 155 }
 156
 157 /**
 158  * Returns the low Y value of the vertical range given, flipped according to
 159  * whether the framebuffer is or not.
 160  */
 161 static inline int
 162 y_flip(struct gl_framebuffer *fb, int y, int height)
 163 {
 164    if (_mesa_is_user_fbo(fb))
 165       return y;
 166    else
 167       return fb->Height - y - height;
 168 }
 169
 170 /*
 171  * Render a bitmap.
 172  */
 173 static bool
 174 do_blit_bitmap( struct gl_context *ctx,
 175                 GLint dstx, GLint dsty,
 176                 GLsizei width, GLsizei height,
 177                 const struct gl_pixelstore_attrib *unpack,
 178                 const GLubyte *bitmap )
 179 {
 180    struct brw_context *brw = brw_context(ctx);
 181    struct gl_framebuffer *fb = ctx->DrawBuffer;
 182    struct intel_renderbuffer *irb;
 183    GLfloat tmpColor[4];
 184    GLubyte ubcolor[4];
 185    GLuint color;
 186    GLsizei bitmap_width = width;
 187    GLsizei bitmap_height = height;
 188    GLint px, py;
 189    GLuint stipple[32];
 190    GLint orig_dstx = dstx;
 191    GLint orig_dsty = dsty;
 192
 193    /* Update draw buffer bounds */
 194    _mesa_update_state(ctx);
 195
 196    if (ctx->Depth.Test) {
 197       /* The blit path produces incorrect results when depth testing is on.
 198        * It seems the blit Z coord is always 1.0 (the far plane) so fragments
 199        * will likely be obscured by other, closer geometry.
 200        */
 201       return false;
 202    }
 203
 204    intel_prepare_render(brw);
 205
 206    if (fb->_NumColorDrawBuffers != 1) {
 207       perf_debug("accelerated glBitmap() only supports rendering to a "
 208                  "single color buffer\n");
 209       return false;
 210    }
 211
 212    irb = intel_renderbuffer(fb->_ColorDrawBuffers[0]);
 213
 214    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 215       bitmap = map_pbo(ctx, width, height, unpack, bitmap);
 216       if (bitmap == NULL)
 217          return true;   /* even though this is an error, we're done */
 218    }
 219
 220    COPY_4V(tmpColor, ctx->Current.RasterColor);
 221
 222    if (_mesa_need_secondary_color(ctx)) {
 223        ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor);
 224    }
 225
 226    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]);
 227    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]);
 228    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]);
 229    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]);
 230
 231    switch (_mesa_get_render_format(ctx, intel_rb_format(irb))) {
 232    case MESA_FORMAT_B8G8R8A8_UNORM:
 233    case MESA_FORMAT_B8G8R8X8_UNORM:
 234       color = PACK_COLOR_8888(ubcolor[3], ubcolor[0], ubcolor[1], ubcolor[2]);
 235       break;
 236    case MESA_FORMAT_RGB565:
 237       color = PACK_COLOR_565(ubcolor[0], ubcolor[1], ubcolor[2]);
 238       break;
 239    default:
 240       perf_debug("Unsupported format %s in accelerated glBitmap()\n",
 241                  _mesa_get_format_name(irb->mt->format));
 242       return false;
 243    }
 244
 245    if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F))
 246       return false;
 247
 248    /* Clip to buffer bounds and scissor. */
 249    if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
 250                              fb->_Xmax, fb->_Ymax,
 251                              &dstx, &dsty, &width, &height))
 252       goto out;
 253
 254    dsty = y_flip(fb, dsty, height);
 255
 256 #define DY 32
 257 #define DX 32
 258
 259    /* The blitter has no idea about fast color clears, so we need to resolve
 260     * the miptree before we do anything.
 261     */
 262    intel_miptree_resolve_color(brw, irb->mt);
 263
 264    /* Chop it all into chunks that can be digested by hardware: */
 265    for (py = 0; py < height; py += DY) {
 266       for (px = 0; px < width; px += DX) {
 267          int h = MIN2(DY, height - py);
 268          int w = MIN2(DX, width - px);
 269          GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8;
 270          GLenum logic_op = ctx->Color.ColorLogicOpEnabled ?
 271             ctx->Color.LogicOp : GL_COPY;
 272
 273          assert(sz <= sizeof(stipple));
 274          memset(stipple, 0, sz);
 275
 276          /* May need to adjust this when padding has been introduced in
 277           * sz above:
 278           *
 279           * Have to translate destination coordinates back into source
 280           * coordinates.
 281           */
 282          int count = get_bitmap_rect(bitmap_width, bitmap_height, unpack,
 283                                      bitmap,
 284                                      -orig_dstx + (dstx + px),
 285                                      -orig_dsty + y_flip(fb, dsty + py, h),
 286                                      w, h,
 287                                      (GLubyte *)stipple,
 288                                      8,
 289                                      _mesa_is_winsys_fbo(fb));
 290          if (count == 0)
 291             continue;
 292
 293          if (!intelEmitImmediateColorExpandBlit(brw,
 294                                                 irb->mt->cpp,
 295                                                 (GLubyte *)stipple,
 296                                                 sz,
 297                                                 color,
 298                                                 irb->mt->region->pitch,
 299                                                 irb->mt->region->bo,
 300                                                 0,
 301                                                 irb->mt->region->tiling,
 302                                                 dstx + px,
 303                                                 dsty + py,
 304                                                 w, h,
 305                                                 logic_op)) {
 306             return false;
 307          }
 308
 309          if (ctx->Query.CurrentOcclusionObject)
 310             ctx->Query.CurrentOcclusionObject->Result += count;
 311       }
 312    }
 313 out:
 314
 315    if (unlikely(INTEL_DEBUG & DEBUG_SYNC))
 316       intel_batchbuffer_flush(brw);
 317
 318    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 319       /* done with PBO so unmap it now */
 320       ctx->Driver.UnmapBuffer(ctx, unpack->BufferObj);
 321    }
 322
 323    intel_check_front_buffer_rendering(brw);
 324
 325    return true;
 326 }
 327
 328
 329 /* There are a large number of possible ways to implement bitmap on
 330  * this hardware, most of them have some sort of drawback.  Here are a
 331  * few that spring to mind:
 332  *
 333  * Blit:
 334  *    - XY_MONO_SRC_BLT_CMD
 335  *         - use XY_SETUP_CLIP_BLT for cliprect clipping.
 336  *    - XY_TEXT_BLT
 337  *    - XY_TEXT_IMMEDIATE_BLT
 338  *         - blit per cliprect, subject to maximum immediate data size.
 339  *    - XY_COLOR_BLT
 340  *         - per pixel or run of pixels
 341  *    - XY_PIXEL_BLT
 342  *         - good for sparse bitmaps
 343  *
 344  * 3D engine:
 345  *    - Point per pixel
 346  *    - Translate bitmap to an alpha texture and render as a quad
 347  *    - Chop bitmap up into 32x32 squares and render w/polygon stipple.
 348  */
 349 void
 350 intelBitmap(struct gl_context * ctx,
 351             GLint x, GLint y,
 352             GLsizei width, GLsizei height,
 353             const struct gl_pixelstore_attrib *unpack,
 354             const GLubyte * pixels)
 355 {
 356    if (!_mesa_check_conditional_render(ctx))
 357       return;
 358
 359    if (do_blit_bitmap(ctx, x, y, width, height,
 360                           unpack, pixels))
 361       return;
 362
 363    _mesa_meta_Bitmap(ctx, x, y, width, height, unpack, pixels);
 364 }