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

   1 /**************************************************************************
   2  *
   3  * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
   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 TUNGSTEN GRAPHICS 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/glheader.h"
  29 #include "main/enums.h"
  30 #include "main/image.h"
  31 #include "main/colormac.h"
  32 #include "main/mtypes.h"
  33 #include "main/macros.h"
  34 #include "main/bufferobj.h"
  35 #include "main/state.h"
  36 #include "main/texobj.h"
  37 #include "main/context.h"
  38 #include "swrast/swrast.h"
  39 #include "drivers/common/meta.h"
  40
  41 #include "intel_screen.h"
  42 #include "intel_context.h"
  43 #include "intel_batchbuffer.h"
  44 #include "intel_blit.h"
  45 #include "intel_regions.h"
  46 #include "intel_buffers.h"
  47 #include "intel_pixel.h"
  48 #include "intel_reg.h"
  49
  50
  51 #define FILE_DEBUG_FLAG DEBUG_PIXEL
  52
  53
  54 /* Unlike the other intel_pixel_* functions, the expectation here is
  55  * that the incoming data is not in a PBO.  With the XY_TEXT blit
  56  * method, there's no benefit haveing it in a PBO, but we could
  57  * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit
  58  * PBO bitmaps.  I think they are probably pretty rare though - I
  59  * wonder if Xgl uses them?
  60  */
  61 static const GLubyte *map_pbo( struct gl_context *ctx,
  62                                GLsizei width, GLsizei height,
  63                                const struct gl_pixelstore_attrib *unpack,
  64                                const GLubyte *bitmap )
  65 {
  66    GLubyte *buf;
  67
  68    if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
  69                                   GL_COLOR_INDEX, GL_BITMAP,
  70                                   (GLvoid *) bitmap)) {
  71       _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");
  72       return NULL;
  73    }
  74
  75    buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
  76                                            GL_READ_ONLY_ARB,
  77                                            unpack->BufferObj);
  78    if (!buf) {
  79       _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
  80       return NULL;
  81    }
  82
  83    return ADD_POINTERS(buf, bitmap);
  84 }
  85
  86 static GLboolean test_bit( const GLubyte *src, GLuint bit )
  87 {
  88    return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0;
  89 }
  90
  91 static void set_bit( GLubyte *dest, GLuint bit )
  92 {
  93    dest[bit/8] |= 1 << (bit % 8);
  94 }
  95
  96 /* Extract a rectangle's worth of data from the bitmap.  Called
  97  * per chunk of HW-sized bitmap.
  98  */
  99 static GLuint get_bitmap_rect(GLsizei width, GLsizei height,
 100                               const struct gl_pixelstore_attrib *unpack,
 101                               const GLubyte *bitmap,
 102                               GLuint x, GLuint y,
 103                               GLuint w, GLuint h,
 104                               GLubyte *dest,
 105                               GLuint row_align,
 106                               GLboolean invert)
 107 {
 108    GLuint src_offset = (x + unpack->SkipPixels) & 0x7;
 109    GLuint mask = unpack->LsbFirst ? 0 : 7;
 110    GLuint bit = 0;
 111    GLint row, col;
 112    GLint first, last;
 113    GLint incr;
 114    GLuint count = 0;
 115
 116    DBG("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n",
 117        __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask);
 118
 119    if (invert) {
 120       first = h-1;
 121       last = 0;
 122       incr = -1;
 123    }
 124    else {
 125       first = 0;
 126       last = h-1;
 127       incr = 1;
 128    }
 129
 130    /* Require that dest be pre-zero'd.
 131     */
 132    for (row = first; row != (last+incr); row += incr) {
 133       const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap,
 134                                                     width, height,
 135                                                     GL_COLOR_INDEX, GL_BITMAP,
 136                                                     y + row, x);
 137
 138       for (col = 0; col < w; col++, bit++) {
 139          if (test_bit(rowsrc, (col + src_offset) ^ mask)) {
 140             set_bit(dest, bit ^ 7);
 141             count++;
 142          }
 143       }
 144
 145       if (row_align)
 146          bit = ALIGN(bit, row_align);
 147    }
 148
 149    return count;
 150 }
 151
 152 /**
 153  * Returns the low Y value of the vertical range given, flipped according to
 154  * whether the framebuffer is or not.
 155  */
 156 static INLINE int
 157 y_flip(struct gl_framebuffer *fb, int y, int height)
 158 {
 159    if (fb->Name != 0)
 160       return y;
 161    else
 162       return fb->Height - y - height;
 163 }
 164
 165 /*
 166  * Render a bitmap.
 167  */
 168 static GLboolean
 169 do_blit_bitmap( struct gl_context *ctx,
 170                 GLint dstx, GLint dsty,
 171                 GLsizei width, GLsizei height,
 172                 const struct gl_pixelstore_attrib *unpack,
 173                 const GLubyte *bitmap )
 174 {
 175    struct intel_context *intel = intel_context(ctx);
 176    struct intel_region *dst = intel_drawbuf_region(intel);
 177    struct gl_framebuffer *fb = ctx->DrawBuffer;
 178    GLfloat tmpColor[4];
 179    GLubyte ubcolor[4];
 180    GLuint color;
 181    GLsizei bitmap_width = width;
 182    GLsizei bitmap_height = height;
 183    GLint px, py;
 184    GLuint stipple[32];
 185    GLint orig_dstx = dstx;
 186    GLint orig_dsty = dsty;
 187
 188    /* Update draw buffer bounds */
 189    _mesa_update_state(ctx);
 190
 191    if (ctx->Depth.Test) {
 192       /* The blit path produces incorrect results when depth testing is on.
 193        * It seems the blit Z coord is always 1.0 (the far plane) so fragments
 194        * will likely be obscured by other, closer geometry.
 195        */
 196       return GL_FALSE;
 197    }
 198
 199    if (!dst)
 200        return GL_FALSE;
 201
 202    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 203       bitmap = map_pbo(ctx, width, height, unpack, bitmap);
 204       if (bitmap == NULL)
 205          return GL_TRUE;        /* even though this is an error, we're done */
 206    }
 207
 208    COPY_4V(tmpColor, ctx->Current.RasterColor);
 209
 210    if (NEED_SECONDARY_COLOR(ctx)) {
 211        ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor);
 212    }
 213
 214    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]);
 215    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]);
 216    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]);
 217    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]);
 218
 219    if (dst->cpp == 2)
 220       color = PACK_COLOR_565(ubcolor[0], ubcolor[1], ubcolor[2]);
 221    else
 222       color = PACK_COLOR_8888(ubcolor[3], ubcolor[0], ubcolor[1], ubcolor[2]);
 223
 224    if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F))
 225       return GL_FALSE;
 226
 227    intel_prepare_render(intel);
 228
 229    /* Clip to buffer bounds and scissor. */
 230    if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
 231                              fb->_Xmax, fb->_Ymax,
 232                              &dstx, &dsty, &width, &height))
 233       goto out;
 234
 235    dsty = y_flip(fb, dsty, height);
 236
 237 #define DY 32
 238 #define DX 32
 239
 240    /* Chop it all into chunks that can be digested by hardware: */
 241    for (py = 0; py < height; py += DY) {
 242       for (px = 0; px < width; px += DX) {
 243          int h = MIN2(DY, height - py);
 244          int w = MIN2(DX, width - px);
 245          GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8;
 246          GLenum logic_op = ctx->Color.ColorLogicOpEnabled ?
 247             ctx->Color.LogicOp : GL_COPY;
 248
 249          assert(sz <= sizeof(stipple));
 250          memset(stipple, 0, sz);
 251
 252          /* May need to adjust this when padding has been introduced in
 253           * sz above:
 254           *
 255           * Have to translate destination coordinates back into source
 256           * coordinates.
 257           */
 258          if (get_bitmap_rect(bitmap_width, bitmap_height, unpack,
 259                              bitmap,
 260                              -orig_dstx + (dstx + px),
 261                              -orig_dsty + y_flip(fb, dsty + py, h),
 262                              w, h,
 263                              (GLubyte *)stipple,
 264                              8,
 265                              fb->Name == 0 ? GL_TRUE : GL_FALSE) == 0)
 266             continue;
 267
 268          if (!intelEmitImmediateColorExpandBlit(intel,
 269                                                 dst->cpp,
 270                                                 (GLubyte *)stipple,
 271                                                 sz,
 272                                                 color,
 273                                                 dst->pitch,
 274                                                 dst->buffer,
 275                                                 0,
 276                                                 dst->tiling,
 277                                                 dstx + px,
 278                                                 dsty + py,
 279                                                 w, h,
 280                                                 logic_op)) {
 281             return GL_FALSE;
 282          }
 283       }
 284    }
 285 out:
 286
 287    if (unlikely(INTEL_DEBUG & DEBUG_SYNC))
 288       intel_batchbuffer_flush(intel->batch);
 289
 290    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 291       /* done with PBO so unmap it now */
 292       ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
 293                               unpack->BufferObj);
 294    }
 295
 296    intel_check_front_buffer_rendering(intel);
 297
 298    return GL_TRUE;
 299 }
 300
 301
 302 /* There are a large number of possible ways to implement bitmap on
 303  * this hardware, most of them have some sort of drawback.  Here are a
 304  * few that spring to mind:
 305  *
 306  * Blit:
 307  *    - XY_MONO_SRC_BLT_CMD
 308  *         - use XY_SETUP_CLIP_BLT for cliprect clipping.
 309  *    - XY_TEXT_BLT
 310  *    - XY_TEXT_IMMEDIATE_BLT
 311  *         - blit per cliprect, subject to maximum immediate data size.
 312  *    - XY_COLOR_BLT
 313  *         - per pixel or run of pixels
 314  *    - XY_PIXEL_BLT
 315  *         - good for sparse bitmaps
 316  *
 317  * 3D engine:
 318  *    - Point per pixel
 319  *    - Translate bitmap to an alpha texture and render as a quad
 320  *    - Chop bitmap up into 32x32 squares and render w/polygon stipple.
 321  */
 322 void
 323 intelBitmap(struct gl_context * ctx,
 324             GLint x, GLint y,
 325             GLsizei width, GLsizei height,
 326             const struct gl_pixelstore_attrib *unpack,
 327             const GLubyte * pixels)
 328 {
 329    struct intel_context *intel = intel_context(ctx);
 330
 331    if (do_blit_bitmap(ctx, x, y, width, height,
 332                           unpack, pixels))
 333       return;
 334
 335    /* FIXME */
 336    if (intel->gen == 6)
 337        return _swrast_Bitmap(ctx, x, y, width, height, unpack, pixels);
 338
 339    _mesa_meta_Bitmap(ctx, x, y, width, height, unpack, pixels);
 340 }