src/mesa/drivers/dri/r200/r200_span.c

   1 /* $XFree86: xc/lib/GL/mesa/src/drv/r200/r200_span.c,v 1.1 2002/10/30 12:51:52 alanh Exp $ */
   2 /*
   3 Copyright (C) The Weather Channel, Inc.  2002.  All Rights Reserved.
   4
   5 The Weather Channel (TM) funded Tungsten Graphics to develop the
   6 initial release of the Radeon 8500 driver under the XFree86 license.
   7 This notice must be preserved.
   8
   9 Permission is hereby granted, free of charge, to any person obtaining
  10 a copy of this software and associated documentation files (the
  11 "Software"), to deal in the Software without restriction, including
  12 without limitation the rights to use, copy, modify, merge, publish,
  13 distribute, sublicense, and/or sell copies of the Software, and to
  14 permit persons to whom the Software is furnished to do so, subject to
  15 the following conditions:
  16
  17 The above copyright notice and this permission notice (including the
  18 next paragraph) shall be included in all copies or substantial
  19 portions of the Software.
  20
  21 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  24 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  25 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28
  29 **************************************************************************/
  30
  31 /*
  32  * Authors:
  33  *   Keith Whitwell <keith@tungstengraphics.com>
  34  */
  35
  36 #include "glheader.h"
  37 #include "imports.h"
  38 #include "swrast/swrast.h"
  39 #include "colormac.h"
  40
  41 #include "r200_context.h"
  42 #include "r200_ioctl.h"
  43 #include "r200_state.h"
  44 #include "r200_span.h"
  45 #include "r200_tex.h"
  46
  47 #define DBG 0
  48
  49 #define LOCAL_VARS                                                      \
  50    r200ContextPtr rmesa = R200_CONTEXT(ctx);                    \
  51    r200ScreenPtr r200Screen = rmesa->r200Screen;                        \
  52    __DRIscreenPrivate *sPriv = rmesa->dri.screen;                       \
  53    __DRIdrawablePrivate *dPriv = rmesa->dri.drawable;                   \
  54    GLuint pitch = r200Screen->frontPitch * r200Screen->cpp;             \
  55    GLuint height = dPriv->h;                                            \
  56    char *buf = (char *)(sPriv->pFB +                                    \
  57                         rmesa->state.color.drawOffset +                 \
  58                         (dPriv->x * r200Screen->cpp) +          \
  59                         (dPriv->y * pitch));                            \
  60    char *read_buf = (char *)(sPriv->pFB +                               \
  61                              rmesa->state.pixel.readOffset +            \
  62                              (dPriv->x * r200Screen->cpp) +             \
  63                              (dPriv->y * pitch));                       \
  64    GLuint p;                                                            \
  65    (void) read_buf; (void) buf; (void) p
  66
  67 #define LOCAL_DEPTH_VARS                                                \
  68    r200ContextPtr rmesa = R200_CONTEXT(ctx);                    \
  69    r200ScreenPtr r200Screen = rmesa->r200Screen;                        \
  70    __DRIscreenPrivate *sPriv = rmesa->dri.screen;                       \
  71    __DRIdrawablePrivate *dPriv = rmesa->dri.drawable;                   \
  72    GLuint height = dPriv->h;                                            \
  73    GLuint xo = dPriv->x;                                                \
  74    GLuint yo = dPriv->y;                                                \
  75    char *buf = (char *)(sPriv->pFB + r200Screen->depthOffset);  \
  76    (void) buf
  77
  78 #define LOCAL_STENCIL_VARS      LOCAL_DEPTH_VARS
  79
  80
  81 #define CLIPPIXEL( _x, _y )                                             \
  82    ((_x >= minx) && (_x < maxx) && (_y >= miny) && (_y < maxy))
  83
  84
  85 #define CLIPSPAN( _x, _y, _n, _x1, _n1, _i )                            \
  86    if ( _y < miny || _y >= maxy ) {                                     \
  87       _n1 = 0, _x1 = x;                                                 \
  88    } else {                                                             \
  89       _n1 = _n;                                                         \
  90       _x1 = _x;                                                         \
  91       if ( _x1 < minx ) _i += (minx-_x1), n1 -= (minx-_x1), _x1 = minx; \
  92       if ( _x1 + _n1 >= maxx ) n1 -= (_x1 + n1 - maxx);                 \
  93    }
  94
  95 #define Y_FLIP( _y )            (height - _y - 1)
  96
  97
  98 #define HW_LOCK()
  99
 100 #define HW_CLIPLOOP()                                                   \
 101    do {                                                                 \
 102       __DRIdrawablePrivate *dPriv = rmesa->dri.drawable;                \
 103       int _nc = dPriv->numClipRects;                                    \
 104                                                                         \
 105       while ( _nc-- ) {                                                 \
 106          int minx = dPriv->pClipRects[_nc].x1 - dPriv->x;               \
 107          int miny = dPriv->pClipRects[_nc].y1 - dPriv->y;               \
 108          int maxx = dPriv->pClipRects[_nc].x2 - dPriv->x;               \
 109          int maxy = dPriv->pClipRects[_nc].y2 - dPriv->y;
 110
 111 #define HW_ENDCLIPLOOP()                                                \
 112       }                                                                 \
 113    } while (0)
 114
 115 #define HW_UNLOCK()
 116
 117
 118
 119 /* ================================================================
 120  * Color buffer
 121  */
 122
 123 /* 16 bit, RGB565 color spanline and pixel functions
 124  */
 125 #define INIT_MONO_PIXEL(p, color) \
 126   p = PACK_COLOR_565( color[0], color[1], color[2] )
 127
 128 #define WRITE_RGBA( _x, _y, r, g, b, a )                                \
 129    *(GLushort *)(buf + _x*2 + _y*pitch) = ((((int)r & 0xf8) << 8) |     \
 130                                            (((int)g & 0xfc) << 3) |     \
 131                                            (((int)b & 0xf8) >> 3))
 132
 133 #define WRITE_PIXEL( _x, _y, p )                                        \
 134    *(GLushort *)(buf + _x*2 + _y*pitch) = p
 135
 136 #define READ_RGBA( rgba, _x, _y )                                       \
 137    do {                                                                 \
 138       GLushort p = *(GLushort *)(read_buf + _x*2 + _y*pitch);           \
 139       rgba[0] = ((p >> 8) & 0xf8) * 255 / 0xf8;                         \
 140       rgba[1] = ((p >> 3) & 0xfc) * 255 / 0xfc;                         \
 141       rgba[2] = ((p << 3) & 0xf8) * 255 / 0xf8;                         \
 142       rgba[3] = 0xff;                                                   \
 143    } while (0)
 144
 145 #define TAG(x) r200##x##_RGB565
 146 #include "spantmp.h"
 147
 148 /* 32 bit, ARGB8888 color spanline and pixel functions
 149  */
 150 #undef INIT_MONO_PIXEL
 151 #define INIT_MONO_PIXEL(p, color) \
 152   p = PACK_COLOR_8888( color[3], color[0], color[1], color[2] )
 153
 154 #define WRITE_RGBA( _x, _y, r, g, b, a )                        \
 155 do {                                                            \
 156    *(GLuint *)(buf + _x*4 + _y*pitch) = ((b <<  0) |            \
 157                                          (g <<  8) |            \
 158                                          (r << 16) |            \
 159                                          (a << 24) );           \
 160 } while (0)
 161
 162 #define WRITE_PIXEL( _x, _y, p )                        \
 163 do {                                                    \
 164    *(GLuint *)(buf + _x*4 + _y*pitch) = p;              \
 165 } while (0)
 166
 167 #define READ_RGBA( rgba, _x, _y )                               \
 168 do {                                                            \
 169    volatile GLuint *ptr = (volatile GLuint *)(read_buf + _x*4 + _y*pitch); \
 170    GLuint p = *ptr;                                     \
 171    rgba[0] = (p >> 16) & 0xff;                                  \
 172    rgba[1] = (p >>  8) & 0xff;                                  \
 173    rgba[2] = (p >>  0) & 0xff;                                  \
 174    rgba[3] = (p >> 24) & 0xff;                                  \
 175 } while (0)
 176
 177 #define TAG(x) r200##x##_ARGB8888
 178 #include "spantmp.h"
 179
 180
 181
 182 /* ================================================================
 183  * Depth buffer
 184  */
 185
 186 /* The Radeon family has depth tiling on all the time, so we have to convert
 187  * the x,y coordinates into the memory bus address (mba) in the same
 188  * manner as the engine.  In each case, the linear block address (ba)
 189  * is calculated, and then wired with x and y to produce the final
 190  * memory address.
 191  */
 192
 193 #define BIT(x,b) ((x & (1<<b))>>b)
 194 static GLuint r200_mba_z32( r200ContextPtr rmesa,
 195                                        GLint x, GLint y )
 196 {
 197    GLuint pitch = rmesa->r200Screen->frontPitch;
 198    GLuint b = ((y & 0x3FF) >> 4) * ((pitch & 0xFFF) >> 5) + ((x & 0x3FF) >> 5);
 199    GLuint a =
 200       (BIT(x,0) << 2) |
 201       (BIT(y,0) << 3) |
 202       (BIT(x,1) << 4) |
 203       (BIT(y,1) << 5) |
 204       (BIT(x,3) << 6) |
 205       (BIT(x,4) << 7) |
 206       (BIT(x,2) << 8) |
 207       (BIT(y,2) << 9) |
 208       (BIT(y,3) << 10) |
 209       (((pitch & 0x20) ? (b & 0x01) : ((b & 0x01) ^ (BIT(y,4)))) << 11) |
 210       ((b >> 1) << 12);
 211    return a;
 212 }
 213
 214 static GLuint r200_mba_z16( r200ContextPtr rmesa, GLint x, GLint y )
 215 {
 216    GLuint pitch = rmesa->r200Screen->frontPitch;
 217    GLuint b = ((y & 0x3FF) >> 4) * ((pitch & 0xFFF) >> 6) + ((x & 0x3FF) >> 6);
 218    GLuint a =
 219       (BIT(x,0) << 1) |
 220       (BIT(y,0) << 2) |
 221       (BIT(x,1) << 3) |
 222       (BIT(y,1) << 4) |
 223       (BIT(x,2) << 5) |
 224       (BIT(x,4) << 6) |
 225       (BIT(x,5) << 7) |
 226       (BIT(x,3) << 8) |
 227       (BIT(y,2) << 9) |
 228       (BIT(y,3) << 10) |
 229       (((pitch & 0x40) ? (b & 0x01) : ((b & 0x01) ^ (BIT(y,4)))) << 11) |
 230       ((b >> 1) << 12);
 231    return a;
 232 }
 233
 234
 235 /* 16-bit depth buffer functions
 236  */
 237 #define WRITE_DEPTH( _x, _y, d )                                        \
 238    *(GLushort *)(buf + r200_mba_z16( rmesa, _x + xo, _y + yo )) = d;
 239
 240 #define READ_DEPTH( d, _x, _y )                                         \
 241    d = *(GLushort *)(buf + r200_mba_z16( rmesa, _x + xo, _y + yo ));
 242
 243 #define TAG(x) r200##x##_16
 244 #include "depthtmp.h"
 245
 246 /* 24 bit depth, 8 bit stencil depthbuffer functions
 247  */
 248 #define WRITE_DEPTH( _x, _y, d )                                        \
 249 do {                                                                    \
 250    GLuint offset = r200_mba_z32( rmesa, _x + xo, _y + yo );             \
 251    GLuint tmp = *(GLuint *)(buf + offset);                              \
 252    tmp &= 0xff000000;                                                   \
 253    tmp |= ((d) & 0x00ffffff);                                           \
 254    *(GLuint *)(buf + offset) = tmp;                                     \
 255 } while (0)
 256
 257 #define READ_DEPTH( d, _x, _y )                                         \
 258    d = *(GLuint *)(buf + r200_mba_z32( rmesa, _x + xo,          \
 259                                          _y + yo )) & 0x00ffffff;
 260
 261 #define TAG(x) r200##x##_24_8
 262 #include "depthtmp.h"
 263
 264
 265 /* ================================================================
 266  * Stencil buffer
 267  */
 268
 269 /* 24 bit depth, 8 bit stencil depthbuffer functions
 270  */
 271 #define WRITE_STENCIL( _x, _y, d )                                      \
 272 do {                                                                    \
 273    GLuint offset = r200_mba_z32( rmesa, _x + xo, _y + yo );             \
 274    GLuint tmp = *(GLuint *)(buf + offset);                              \
 275    tmp &= 0x00ffffff;                                                   \
 276    tmp |= (((d) & 0xff) << 24);                                         \
 277    *(GLuint *)(buf + offset) = tmp;                                     \
 278 } while (0)
 279
 280 #define READ_STENCIL( d, _x, _y )                                       \
 281 do {                                                                    \
 282    GLuint offset = r200_mba_z32( rmesa, _x + xo, _y + yo );             \
 283    GLuint tmp = *(GLuint *)(buf + offset);                              \
 284    tmp &= 0xff000000;                                                   \
 285    d = tmp >> 24;                                                       \
 286 } while (0)
 287
 288 #define TAG(x) r200##x##_24_8
 289 #include "stenciltmp.h"
 290
 291
 292 /*
 293  * This function is called to specify which buffer to read and write
 294  * for software rasterization (swrast) fallbacks.  This doesn't necessarily
 295  * correspond to glDrawBuffer() or glReadBuffer() calls.
 296  */
 297 static void r200SetBuffer( GLcontext *ctx,
 298                            GLframebuffer *colorBuffer,
 299                            GLuint bufferBit )
 300 {
 301    r200ContextPtr rmesa = R200_CONTEXT(ctx);
 302
 303    switch ( bufferBit ) {
 304    case DD_FRONT_LEFT_BIT:
 305       if ( rmesa->doPageFlip && rmesa->sarea->pfCurrentPage == 1 ) {
 306         rmesa->state.pixel.readOffset = rmesa->r200Screen->backOffset;
 307         rmesa->state.pixel.readPitch  = rmesa->r200Screen->backPitch;
 308         rmesa->state.color.drawOffset = rmesa->r200Screen->backOffset;
 309         rmesa->state.color.drawPitch  = rmesa->r200Screen->backPitch;
 310       } else {
 311         rmesa->state.pixel.readOffset = rmesa->r200Screen->frontOffset;
 312         rmesa->state.pixel.readPitch  = rmesa->r200Screen->frontPitch;
 313         rmesa->state.color.drawOffset = rmesa->r200Screen->frontOffset;
 314         rmesa->state.color.drawPitch  = rmesa->r200Screen->frontPitch;
 315       }
 316       break;
 317    case DD_BACK_LEFT_BIT:
 318       if ( rmesa->doPageFlip && rmesa->sarea->pfCurrentPage == 1 ) {
 319         rmesa->state.pixel.readOffset = rmesa->r200Screen->frontOffset;
 320         rmesa->state.pixel.readPitch  = rmesa->r200Screen->frontPitch;
 321         rmesa->state.color.drawOffset = rmesa->r200Screen->frontOffset;
 322         rmesa->state.color.drawPitch  = rmesa->r200Screen->frontPitch;
 323       } else {
 324         rmesa->state.pixel.readOffset = rmesa->r200Screen->backOffset;
 325         rmesa->state.pixel.readPitch  = rmesa->r200Screen->backPitch;
 326         rmesa->state.color.drawOffset = rmesa->r200Screen->backOffset;
 327         rmesa->state.color.drawPitch  = rmesa->r200Screen->backPitch;
 328       }
 329       break;
 330    default:
 331       _mesa_problem(ctx, "Bad bufferBit in %s", __FUNCTION__);
 332       break;
 333    }
 334 }
 335
 336 /* Move locking out to get reasonable span performance (10x better
 337  * than doing this in HW_LOCK above).  WaitForIdle() is the main
 338  * culprit.
 339  */
 340
 341 static void r200SpanRenderStart( GLcontext *ctx )
 342 {
 343    r200ContextPtr rmesa = R200_CONTEXT( ctx );
 344
 345    R200_FIREVERTICES( rmesa );
 346    LOCK_HARDWARE( rmesa );
 347    r200WaitForIdleLocked( rmesa );
 348
 349    /* Read & rewrite the first pixel in the frame buffer.  This should
 350     * be a noop, right?  In fact without this conform fails as reading
 351     * from the framebuffer sometimes produces old results -- the
 352     * on-card read cache gets mixed up and doesn't notice that the
 353     * framebuffer has been updated.
 354     *
 355     * In the worst case this is buggy too as p might get the wrong
 356     * value first time, so really need a hidden pixel somewhere for this.
 357     */
 358    {
 359       int p;
 360       volatile int *read_buf = (volatile int *)(rmesa->dri.screen->pFB +
 361                                                 rmesa->state.pixel.readOffset);
 362       p = *read_buf;
 363       *read_buf = p;
 364    }
 365 }
 366
 367 static void r200SpanRenderFinish( GLcontext *ctx )
 368 {
 369    r200ContextPtr rmesa = R200_CONTEXT( ctx );
 370    _swrast_flush( ctx );
 371    UNLOCK_HARDWARE( rmesa );
 372 }
 373
 374 void r200InitSpanFuncs( GLcontext *ctx )
 375 {
 376    r200ContextPtr rmesa = R200_CONTEXT(ctx);
 377    struct swrast_device_driver *swdd = _swrast_GetDeviceDriverReference(ctx);
 378
 379    swdd->SetBuffer = r200SetBuffer;
 380
 381    switch ( rmesa->r200Screen->cpp ) {
 382    case 2:
 383       swdd->WriteRGBASpan       = r200WriteRGBASpan_RGB565;
 384       swdd->WriteRGBSpan        = r200WriteRGBSpan_RGB565;
 385       swdd->WriteMonoRGBASpan   = r200WriteMonoRGBASpan_RGB565;
 386       swdd->WriteRGBAPixels     = r200WriteRGBAPixels_RGB565;
 387       swdd->WriteMonoRGBAPixels = r200WriteMonoRGBAPixels_RGB565;
 388       swdd->ReadRGBASpan        = r200ReadRGBASpan_RGB565;
 389       swdd->ReadRGBAPixels      = r200ReadRGBAPixels_RGB565;
 390       break;
 391
 392    case 4:
 393       swdd->WriteRGBASpan       = r200WriteRGBASpan_ARGB8888;
 394       swdd->WriteRGBSpan        = r200WriteRGBSpan_ARGB8888;
 395       swdd->WriteMonoRGBASpan   = r200WriteMonoRGBASpan_ARGB8888;
 396       swdd->WriteRGBAPixels     = r200WriteRGBAPixels_ARGB8888;
 397       swdd->WriteMonoRGBAPixels = r200WriteMonoRGBAPixels_ARGB8888;
 398       swdd->ReadRGBASpan        = r200ReadRGBASpan_ARGB8888;
 399       swdd->ReadRGBAPixels      = r200ReadRGBAPixels_ARGB8888;
 400       break;
 401
 402    default:
 403       break;
 404    }
 405
 406    switch ( rmesa->glCtx->Visual.depthBits ) {
 407    case 16:
 408       swdd->ReadDepthSpan       = r200ReadDepthSpan_16;
 409       swdd->WriteDepthSpan      = r200WriteDepthSpan_16;
 410       swdd->ReadDepthPixels     = r200ReadDepthPixels_16;
 411       swdd->WriteDepthPixels    = r200WriteDepthPixels_16;
 412       break;
 413
 414    case 24:
 415       swdd->ReadDepthSpan       = r200ReadDepthSpan_24_8;
 416       swdd->WriteDepthSpan      = r200WriteDepthSpan_24_8;
 417       swdd->ReadDepthPixels     = r200ReadDepthPixels_24_8;
 418       swdd->WriteDepthPixels    = r200WriteDepthPixels_24_8;
 419
 420       swdd->ReadStencilSpan     = r200ReadStencilSpan_24_8;
 421       swdd->WriteStencilSpan    = r200WriteStencilSpan_24_8;
 422       swdd->ReadStencilPixels   = r200ReadStencilPixels_24_8;
 423       swdd->WriteStencilPixels  = r200WriteStencilPixels_24_8;
 424       break;
 425
 426    default:
 427       break;
 428    }
 429
 430    swdd->SpanRenderStart          = r200SpanRenderStart;
 431    swdd->SpanRenderFinish         = r200SpanRenderFinish;
 432 }