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/condrender.h"
  33 #include "main/mtypes.h"
  34 #include "main/macros.h"
  35 #include "main/pbo.h"
  36 #include "main/bufferobj.h"
  37 #include "main/state.h"
  38 #include "main/texobj.h"
  39 #include "main/context.h"
  40 #include "swrast/swrast.h"
  41 #include "drivers/common/meta.h"
  42
  43 #include "intel_screen.h"
  44 #include "intel_context.h"
  45 #include "intel_batchbuffer.h"
  46 #include "intel_blit.h"
  47 #include "intel_regions.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.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
  78                                            GL_READ_ONLY_ARB,
  79                                            unpack->BufferObj);
  80    if (!buf) {
  81       _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
  82       return NULL;
  83    }
  84
  85    return ADD_POINTERS(buf, bitmap);
  86 }
  87
  88 static GLboolean test_bit( const GLubyte *src, GLuint bit )
  89 {
  90    return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0;
  91 }
  92
  93 static void set_bit( GLubyte *dest, GLuint bit )
  94 {
  95    dest[bit/8] |= 1 << (bit % 8);
  96 }
  97
  98 /* Extract a rectangle's worth of data from the bitmap.  Called
  99  * per chunk of HW-sized bitmap.
 100  */
 101 static GLuint get_bitmap_rect(GLsizei width, GLsizei height,
 102                               const struct gl_pixelstore_attrib *unpack,
 103                               const GLubyte *bitmap,
 104                               GLuint x, GLuint y,
 105                               GLuint w, GLuint h,
 106                               GLubyte *dest,
 107                               GLuint row_align,
 108                               GLboolean invert)
 109 {
 110    GLuint src_offset = (x + unpack->SkipPixels) & 0x7;
 111    GLuint mask = unpack->LsbFirst ? 0 : 7;
 112    GLuint bit = 0;
 113    GLint row, col;
 114    GLint first, last;
 115    GLint incr;
 116    GLuint count = 0;
 117
 118    DBG("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n",
 119        __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask);
 120
 121    if (invert) {
 122       first = h-1;
 123       last = 0;
 124       incr = -1;
 125    }
 126    else {
 127       first = 0;
 128       last = h-1;
 129       incr = 1;
 130    }
 131
 132    /* Require that dest be pre-zero'd.
 133     */
 134    for (row = first; row != (last+incr); row += incr) {
 135       const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap,
 136                                                     width, height,
 137                                                     GL_COLOR_INDEX, GL_BITMAP,
 138                                                     y + row, x);
 139
 140       for (col = 0; col < w; col++, bit++) {
 141          if (test_bit(rowsrc, (col + src_offset) ^ mask)) {
 142             set_bit(dest, bit ^ 7);
 143             count++;
 144          }
 145       }
 146
 147       if (row_align)
 148          bit = ALIGN(bit, row_align);
 149    }
 150
 151    return count;
 152 }
 153
 154 /**
 155  * Returns the low Y value of the vertical range given, flipped according to
 156  * whether the framebuffer is or not.
 157  */
 158 static INLINE int
 159 y_flip(struct gl_framebuffer *fb, int y, int height)
 160 {
 161    if (fb->Name != 0)
 162       return y;
 163    else
 164       return fb->Height - y - height;
 165 }
 166
 167 /*
 168  * Render a bitmap.
 169  */
 170 static GLboolean
 171 do_blit_bitmap( struct gl_context *ctx,
 172                 GLint dstx, GLint dsty,
 173                 GLsizei width, GLsizei height,
 174                 const struct gl_pixelstore_attrib *unpack,
 175                 const GLubyte *bitmap )
 176 {
 177    struct intel_context *intel = intel_context(ctx);
 178    struct intel_region *dst;
 179    struct gl_framebuffer *fb = ctx->DrawBuffer;
 180    GLfloat tmpColor[4];
 181    GLubyte ubcolor[4];
 182    GLuint color;
 183    GLsizei bitmap_width = width;
 184    GLsizei bitmap_height = height;
 185    GLint px, py;
 186    GLuint stipple[32];
 187    GLint orig_dstx = dstx;
 188    GLint orig_dsty = dsty;
 189
 190    /* Update draw buffer bounds */
 191    _mesa_update_state(ctx);
 192
 193    if (ctx->Depth.Test) {
 194       /* The blit path produces incorrect results when depth testing is on.
 195        * It seems the blit Z coord is always 1.0 (the far plane) so fragments
 196        * will likely be obscured by other, closer geometry.
 197        */
 198       return GL_FALSE;
 199    }
 200
 201    intel_prepare_render(intel);
 202    dst = intel_drawbuf_region(intel);
 203
 204    if (!dst)
 205        return GL_FALSE;
 206
 207    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 208       bitmap = map_pbo(ctx, width, height, unpack, bitmap);
 209       if (bitmap == NULL)
 210          return GL_TRUE;        /* even though this is an error, we're done */
 211    }
 212
 213    COPY_4V(tmpColor, ctx->Current.RasterColor);
 214
 215    if (_mesa_need_secondary_color(ctx)) {
 216        ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor);
 217    }
 218
 219    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]);
 220    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]);
 221    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]);
 222    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]);
 223
 224    if (dst->cpp == 2)
 225       color = PACK_COLOR_565(ubcolor[0], ubcolor[1], ubcolor[2]);
 226    else
 227       color = PACK_COLOR_8888(ubcolor[3], ubcolor[0], ubcolor[1], ubcolor[2]);
 228
 229    if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F))
 230       return GL_FALSE;
 231
 232    /* Clip to buffer bounds and scissor. */
 233    if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
 234                              fb->_Xmax, fb->_Ymax,
 235                              &dstx, &dsty, &width, &height))
 236       goto out;
 237
 238    dsty = y_flip(fb, dsty, height);
 239
 240 #define DY 32
 241 #define DX 32
 242
 243    /* Chop it all into chunks that can be digested by hardware: */
 244    for (py = 0; py < height; py += DY) {
 245       for (px = 0; px < width; px += DX) {
 246          int h = MIN2(DY, height - py);
 247          int w = MIN2(DX, width - px);
 248          GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8;
 249          GLenum logic_op = ctx->Color.ColorLogicOpEnabled ?
 250             ctx->Color.LogicOp : GL_COPY;
 251
 252          assert(sz <= sizeof(stipple));
 253          memset(stipple, 0, sz);
 254
 255          /* May need to adjust this when padding has been introduced in
 256           * sz above:
 257           *
 258           * Have to translate destination coordinates back into source
 259           * coordinates.
 260           */
 261          if (get_bitmap_rect(bitmap_width, bitmap_height, unpack,
 262                              bitmap,
 263                              -orig_dstx + (dstx + px),
 264                              -orig_dsty + y_flip(fb, dsty + py, h),
 265                              w, h,
 266                              (GLubyte *)stipple,
 267                              8,
 268                              fb->Name == 0 ? GL_TRUE : GL_FALSE) == 0)
 269             continue;
 270
 271          if (!intelEmitImmediateColorExpandBlit(intel,
 272                                                 dst->cpp,
 273                                                 (GLubyte *)stipple,
 274                                                 sz,
 275                                                 color,
 276                                                 dst->pitch,
 277                                                 dst->buffer,
 278                                                 0,
 279                                                 dst->tiling,
 280                                                 dstx + px,
 281                                                 dsty + py,
 282                                                 w, h,
 283                                                 logic_op)) {
 284             return GL_FALSE;
 285          }
 286       }
 287    }
 288 out:
 289
 290    if (unlikely(INTEL_DEBUG & DEBUG_SYNC))
 291       intel_batchbuffer_flush(intel);
 292
 293    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 294       /* done with PBO so unmap it now */
 295       ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
 296                               unpack->BufferObj);
 297    }
 298
 299    intel_check_front_buffer_rendering(intel);
 300
 301    return GL_TRUE;
 302 }
 303
 304
 305 /* There are a large number of possible ways to implement bitmap on
 306  * this hardware, most of them have some sort of drawback.  Here are a
 307  * few that spring to mind:
 308  *
 309  * Blit:
 310  *    - XY_MONO_SRC_BLT_CMD
 311  *         - use XY_SETUP_CLIP_BLT for cliprect clipping.
 312  *    - XY_TEXT_BLT
 313  *    - XY_TEXT_IMMEDIATE_BLT
 314  *         - blit per cliprect, subject to maximum immediate data size.
 315  *    - XY_COLOR_BLT
 316  *         - per pixel or run of pixels
 317  *    - XY_PIXEL_BLT
 318  *         - good for sparse bitmaps
 319  *
 320  * 3D engine:
 321  *    - Point per pixel
 322  *    - Translate bitmap to an alpha texture and render as a quad
 323  *    - Chop bitmap up into 32x32 squares and render w/polygon stipple.
 324  */
 325 void
 326 intelBitmap(struct gl_context * ctx,
 327             GLint x, GLint y,
 328             GLsizei width, GLsizei height,
 329             const struct gl_pixelstore_attrib *unpack,
 330             const GLubyte * pixels)
 331 {
 332    struct intel_context *intel = intel_context(ctx);
 333
 334    if (!_mesa_check_conditional_render(ctx))
 335       return;
 336
 337    if (do_blit_bitmap(ctx, x, y, width, height,
 338                           unpack, pixels))
 339       return;
 340
 341    /* FIXME */
 342    if (intel->gen == 6)
 343        return _swrast_Bitmap(ctx, x, y, width, height, unpack, pixels);
 344
 345    _mesa_meta_Bitmap(ctx, x, y, width, height, unpack, pixels);
 346 }