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