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