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_image.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                                                 MAP_INTERNAL);
  84    if (!buf) {
  85       _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
  86       return NULL;
  87    }
  88
  89    return ADD_POINTERS(buf, bitmap);
  90 }
  91
  92 static bool test_bit( const GLubyte *src, GLuint bit )
  93 {
  94    return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0;
  95 }
  96
  97 static void set_bit( GLubyte *dest, GLuint bit )
  98 {
  99    dest[bit/8] |= 1 << (bit % 8);
 100 }
 101
 102 /* Extract a rectangle's worth of data from the bitmap.  Called
 103  * per chunk of HW-sized bitmap.
 104  */
 105 static GLuint get_bitmap_rect(GLsizei width, GLsizei height,
 106                               const struct gl_pixelstore_attrib *unpack,
 107                               const GLubyte *bitmap,
 108                               GLuint x, GLuint y,
 109                               GLuint w, GLuint h,
 110                               GLubyte *dest,
 111                               GLuint row_align,
 112                               bool invert)
 113 {
 114    GLuint src_offset = (x + unpack->SkipPixels) & 0x7;
 115    GLuint mask = unpack->LsbFirst ? 0 : 7;
 116    GLuint bit = 0;
 117    GLint row, col;
 118    GLint first, last;
 119    GLint incr;
 120    GLuint count = 0;
 121
 122    DBG("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n",
 123        __func__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask);
 124
 125    if (invert) {
 126       first = h-1;
 127       last = 0;
 128       incr = -1;
 129    }
 130    else {
 131       first = 0;
 132       last = h-1;
 133       incr = 1;
 134    }
 135
 136    /* Require that dest be pre-zero'd.
 137     */
 138    for (row = first; row != (last+incr); row += incr) {
 139       const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap,
 140                                                     width, height,
 141                                                     GL_COLOR_INDEX, GL_BITMAP,
 142                                                     y + row, x);
 143
 144       for (col = 0; col < w; col++, bit++) {
 145          if (test_bit(rowsrc, (col + src_offset) ^ mask)) {
 146             set_bit(dest, bit ^ 7);
 147             count++;
 148          }
 149       }
 150
 151       if (row_align)
 152          bit = ALIGN(bit, row_align);
 153    }
 154
 155    return count;
 156 }
 157
 158 /**
 159  * Returns the low Y value of the vertical range given, flipped according to
 160  * whether the framebuffer is or not.
 161  */
 162 static inline int
 163 y_flip(struct gl_framebuffer *fb, int y, int height)
 164 {
 165    if (_mesa_is_user_fbo(fb))
 166       return y;
 167    else
 168       return fb->Height - y - height;
 169 }
 170
 171 /*
 172  * Render a bitmap.
 173  */
 174 static bool
 175 do_blit_bitmap( struct gl_context *ctx,
 176                 GLint dstx, GLint dsty,
 177                 GLsizei width, GLsizei height,
 178                 const struct gl_pixelstore_attrib *unpack,
 179                 const GLubyte *bitmap )
 180 {
 181    struct brw_context *brw = brw_context(ctx);
 182    struct gl_framebuffer *fb = ctx->DrawBuffer;
 183    struct intel_renderbuffer *irb;
 184    GLfloat tmpColor[4];
 185    GLubyte ubcolor[4];
 186    GLuint color;
 187    GLsizei bitmap_width = width;
 188    GLsizei bitmap_height = height;
 189    GLint px, py;
 190    GLuint stipple[32];
 191    GLint orig_dstx = dstx;
 192    GLint orig_dsty = dsty;
 193
 194    /* Update draw buffer bounds */
 195    _mesa_update_state(ctx);
 196
 197    if (ctx->Depth.Test) {
 198       /* The blit path produces incorrect results when depth testing is on.
 199        * It seems the blit Z coord is always 1.0 (the far plane) so fragments
 200        * will likely be obscured by other, closer geometry.
 201        */
 202       return false;
 203    }
 204
 205    intel_prepare_render(brw);
 206
 207    if (fb->_NumColorDrawBuffers != 1) {
 208       perf_debug("accelerated glBitmap() only supports rendering to a "
 209                  "single color buffer\n");
 210       return false;
 211    }
 212
 213    irb = intel_renderbuffer(fb->_ColorDrawBuffers[0]);
 214
 215    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 216       bitmap = map_pbo(ctx, width, height, unpack, bitmap);
 217       if (bitmap == NULL)
 218          return true;   /* even though this is an error, we're done */
 219    }
 220
 221    COPY_4V(tmpColor, ctx->Current.RasterColor);
 222
 223    if (_mesa_need_secondary_color(ctx)) {
 224        ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor);
 225    }
 226
 227    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]);
 228    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]);
 229    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]);
 230    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]);
 231
 232    switch (_mesa_get_render_format(ctx, intel_rb_format(irb))) {
 233    case MESA_FORMAT_B8G8R8A8_UNORM:
 234    case MESA_FORMAT_B8G8R8X8_UNORM:
 235       color = PACK_COLOR_8888(ubcolor[3], ubcolor[0], ubcolor[1], ubcolor[2]);
 236       break;
 237    case MESA_FORMAT_B5G6R5_UNORM:
 238       color = PACK_COLOR_565(ubcolor[0], ubcolor[1], ubcolor[2]);
 239       break;
 240    default:
 241       perf_debug("Unsupported format %s in accelerated glBitmap()\n",
 242                  _mesa_get_format_name(irb->mt->format));
 243       return false;
 244    }
 245
 246    if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F))
 247       return false;
 248
 249    /* Clip to buffer bounds and scissor. */
 250    if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
 251                              fb->_Xmax, fb->_Ymax,
 252                              &dstx, &dsty, &width, &height))
 253       goto out;
 254
 255    dsty = y_flip(fb, dsty, height);
 256
 257 #define DY 32
 258 #define DX 32
 259
 260    /* The blitter has no idea about fast color clears, so we need to resolve
 261     * the miptree before we do anything.
 262     */
 263    intel_miptree_resolve_color(brw, irb->mt);
 264
 265    /* Chop it all into chunks that can be digested by hardware: */
 266    for (py = 0; py < height; py += DY) {
 267       for (px = 0; px < width; px += DX) {
 268          int h = MIN2(DY, height - py);
 269          int w = MIN2(DX, width - px);
 270          GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8;
 271          GLenum logic_op = ctx->Color.ColorLogicOpEnabled ?
 272             ctx->Color.LogicOp : GL_COPY;
 273
 274          assert(sz <= sizeof(stipple));
 275          memset(stipple, 0, sz);
 276
 277          /* May need to adjust this when padding has been introduced in
 278           * sz above:
 279           *
 280           * Have to translate destination coordinates back into source
 281           * coordinates.
 282           */
 283          int count = get_bitmap_rect(bitmap_width, bitmap_height, unpack,
 284                                      bitmap,
 285                                      -orig_dstx + (dstx + px),
 286                                      -orig_dsty + y_flip(fb, dsty + py, h),
 287                                      w, h,
 288                                      (GLubyte *)stipple,
 289                                      8,
 290                                      _mesa_is_winsys_fbo(fb));
 291          if (count == 0)
 292             continue;
 293
 294          if (!intelEmitImmediateColorExpandBlit(brw,
 295                                                 irb->mt->cpp,
 296                                                 (GLubyte *)stipple,
 297                                                 sz,
 298                                                 color,
 299                                                 irb->mt->pitch,
 300                                                 irb->mt->bo,
 301                                                 0,
 302                                                 irb->mt->tiling,
 303                                                 dstx + px,
 304                                                 dsty + py,
 305                                                 w, h,
 306                                                 logic_op)) {
 307             return false;
 308          }
 309
 310          if (ctx->Query.CurrentOcclusionObject)
 311             ctx->Query.CurrentOcclusionObject->Result += count;
 312       }
 313    }
 314 out:
 315
 316    if (unlikely(INTEL_DEBUG & DEBUG_SYNC))
 317       intel_batchbuffer_flush(brw);
 318
 319    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 320       /* done with PBO so unmap it now */
 321       ctx->Driver.UnmapBuffer(ctx, unpack->BufferObj, MAP_INTERNAL);
 322    }
 323
 324    return true;
 325 }
 326
 327
 328 /* There are a large number of possible ways to implement bitmap on
 329  * this hardware, most of them have some sort of drawback.  Here are a
 330  * few that spring to mind:
 331  *
 332  * Blit:
 333  *    - XY_MONO_SRC_BLT_CMD
 334  *         - use XY_SETUP_CLIP_BLT for cliprect clipping.
 335  *    - XY_TEXT_BLT
 336  *    - XY_TEXT_IMMEDIATE_BLT
 337  *         - blit per cliprect, subject to maximum immediate data size.
 338  *    - XY_COLOR_BLT
 339  *         - per pixel or run of pixels
 340  *    - XY_PIXEL_BLT
 341  *         - good for sparse bitmaps
 342  *
 343  * 3D engine:
 344  *    - Point per pixel
 345  *    - Translate bitmap to an alpha texture and render as a quad
 346  *    - Chop bitmap up into 32x32 squares and render w/polygon stipple.
 347  */
 348 void
 349 intelBitmap(struct gl_context * ctx,
 350             GLint x, GLint y,
 351             GLsizei width, GLsizei height,
 352             const struct gl_pixelstore_attrib *unpack,
 353             const GLubyte * pixels)
 354 {
 355    if (!_mesa_check_conditional_render(ctx))
 356       return;
 357
 358    if (do_blit_bitmap(ctx, x, y, width, height,
 359                           unpack, pixels))
 360       return;
 361
 362    _mesa_meta_Bitmap(ctx, x, y, width, height, unpack, pixels);
 363 }