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
 126 #define GET_SRC_PTR(_x, _y) (read_buf + _x * 2 + _y * pitch)
 127 #define GET_DST_PTR(_x, _y) (     buf + _x * 2 + _y * pitch)
 128 #define SPANTMP_PIXEL_FMT GL_RGB
 129 #define SPANTMP_PIXEL_TYPE GL_UNSIGNED_SHORT_5_6_5
 130
 131 #define TAG(x)    r200##x##_RGB565
 132 #define TAG2(x,y) r200##x##_RGB565##y
 133 #include "spantmp2.h"
 134
 135 /* 32 bit, ARGB8888 color spanline and pixel functions
 136  */
 137
 138 #define GET_SRC_PTR(_x, _y) (read_buf + _x * 4 + _y * pitch)
 139 #define GET_DST_PTR(_x, _y) (     buf + _x * 4 + _y * pitch)
 140 #define SPANTMP_PIXEL_FMT GL_BGRA
 141 #define SPANTMP_PIXEL_TYPE GL_UNSIGNED_INT_8_8_8_8_REV
 142
 143 #define TAG(x)    r200##x##_ARGB8888
 144 #define TAG2(x,y) r200##x##_ARGB8888##y
 145 #include "spantmp2.h"
 146
 147
 148 /* ================================================================
 149  * Depth buffer
 150  */
 151
 152 /* The Radeon family has depth tiling on all the time, so we have to convert
 153  * the x,y coordinates into the memory bus address (mba) in the same
 154  * manner as the engine.  In each case, the linear block address (ba)
 155  * is calculated, and then wired with x and y to produce the final
 156  * memory address.
 157  * The chip will do address translation on its own if the surface registers
 158  * are set up correctly. It is not quite enough to get it working with hyperz too...
 159  */
 160
 161 #define BIT(x,b) ((x & (1<<b))>>b)
 162 static GLuint r200_mba_z32( r200ContextPtr rmesa,
 163                                        GLint x, GLint y )
 164 {
 165    GLuint pitch = rmesa->r200Screen->frontPitch;
 166    if (rmesa->r200Screen->depthHasSurface) {
 167       return 4*(x + y*pitch);
 168    }
 169    else {
 170       GLuint b = ((y & 0x7FF) >> 4) * ((pitch & 0xFFF) >> 5) + ((x & 0x7FF) >> 5);
 171       GLuint a =
 172          (BIT(x,0) << 2) |
 173          (BIT(y,0) << 3) |
 174          (BIT(x,1) << 4) |
 175          (BIT(y,1) << 5) |
 176          (BIT(x,3) << 6) |
 177          (BIT(x,4) << 7) |
 178          (BIT(x,2) << 8) |
 179          (BIT(y,2) << 9) |
 180          (BIT(y,3) << 10) |
 181          (((pitch & 0x20) ? (b & 0x01) : ((b & 0x01) ^ (BIT(y,4)))) << 11) |
 182          ((b >> 1) << 12);
 183       return a;
 184    }
 185 }
 186
 187 static GLuint r200_mba_z16( r200ContextPtr rmesa, GLint x, GLint y )
 188 {
 189    GLuint pitch = rmesa->r200Screen->frontPitch;
 190    if (rmesa->r200Screen->depthHasSurface) {
 191       return 2*(x + y*pitch);
 192    }
 193    else {
 194       GLuint b = ((y & 0x7FF) >> 4) * ((pitch & 0xFFF) >> 6) + ((x & 0x7FF) >> 6);
 195       GLuint a =
 196          (BIT(x,0) << 1) |
 197          (BIT(y,0) << 2) |
 198          (BIT(x,1) << 3) |
 199          (BIT(y,1) << 4) |
 200          (BIT(x,2) << 5) |
 201          (BIT(x,4) << 6) |
 202          (BIT(x,5) << 7) |
 203          (BIT(x,3) << 8) |
 204          (BIT(y,2) << 9) |
 205          (BIT(y,3) << 10) |
 206          (((pitch & 0x40) ? (b & 0x01) : ((b & 0x01) ^ (BIT(y,4)))) << 11) |
 207          ((b >> 1) << 12);
 208       return a;
 209    }
 210 }
 211
 212
 213 /* 16-bit depth buffer functions
 214  */
 215
 216 #define WRITE_DEPTH( _x, _y, d )                                        \
 217    *(GLushort *)(buf + r200_mba_z16( rmesa, _x + xo, _y + yo )) = d;
 218
 219 #define READ_DEPTH( d, _x, _y )                                         \
 220    d = *(GLushort *)(buf + r200_mba_z16( rmesa, _x + xo, _y + yo ));
 221
 222 #define TAG(x) r200##x##_16
 223 #include "depthtmp.h"
 224
 225
 226 /* 24 bit depth, 8 bit stencil depthbuffer functions
 227  */
 228
 229 #define WRITE_DEPTH( _x, _y, d )                                        \
 230 do {                                                                    \
 231    GLuint offset = r200_mba_z32( rmesa, _x + xo, _y + yo );             \
 232    GLuint tmp = *(GLuint *)(buf + offset);                              \
 233    tmp &= 0xff000000;                                                   \
 234    tmp |= ((d) & 0x00ffffff);                                           \
 235    *(GLuint *)(buf + offset) = tmp;                                     \
 236 } while (0)
 237
 238 #define READ_DEPTH( d, _x, _y )                                         \
 239    d = *(GLuint *)(buf + r200_mba_z32( rmesa, _x + xo,          \
 240                                          _y + yo )) & 0x00ffffff;
 241
 242 #define TAG(x) r200##x##_24_8
 243 #include "depthtmp.h"
 244
 245
 246 /* ================================================================
 247  * Stencil buffer
 248  */
 249
 250 /* 24 bit depth, 8 bit stencil depthbuffer functions
 251  */
 252 #define WRITE_STENCIL( _x, _y, d )                                      \
 253 do {                                                                    \
 254    GLuint offset = r200_mba_z32( rmesa, _x + xo, _y + yo );             \
 255    GLuint tmp = *(GLuint *)(buf + offset);                              \
 256    tmp &= 0x00ffffff;                                                   \
 257    tmp |= (((d) & 0xff) << 24);                                         \
 258    *(GLuint *)(buf + offset) = tmp;                                     \
 259 } while (0)
 260
 261 #define READ_STENCIL( d, _x, _y )                                       \
 262 do {                                                                    \
 263    GLuint offset = r200_mba_z32( rmesa, _x + xo, _y + yo );             \
 264    GLuint tmp = *(GLuint *)(buf + offset);                              \
 265    tmp &= 0xff000000;                                                   \
 266    d = tmp >> 24;                                                       \
 267 } while (0)
 268
 269 #define TAG(x) r200##x##_24_8
 270 #include "stenciltmp.h"
 271
 272
 273 /*
 274  * This function is called to specify which buffer to read and write
 275  * for software rasterization (swrast) fallbacks.  This doesn't necessarily
 276  * correspond to glDrawBuffer() or glReadBuffer() calls.
 277  */
 278 static void r200SetBuffer( GLcontext *ctx,
 279                            GLframebuffer *colorBuffer,
 280                            GLuint bufferBit )
 281 {
 282    r200ContextPtr rmesa = R200_CONTEXT(ctx);
 283
 284    switch ( bufferBit ) {
 285    case BUFFER_BIT_FRONT_LEFT:
 286       if ( rmesa->doPageFlip && rmesa->sarea->pfCurrentPage == 1 ) {
 287         rmesa->state.pixel.readOffset = rmesa->r200Screen->backOffset;
 288         rmesa->state.pixel.readPitch  = rmesa->r200Screen->backPitch;
 289         rmesa->state.color.drawOffset = rmesa->r200Screen->backOffset;
 290         rmesa->state.color.drawPitch  = rmesa->r200Screen->backPitch;
 291       } else {
 292         rmesa->state.pixel.readOffset = rmesa->r200Screen->frontOffset;
 293         rmesa->state.pixel.readPitch  = rmesa->r200Screen->frontPitch;
 294         rmesa->state.color.drawOffset = rmesa->r200Screen->frontOffset;
 295         rmesa->state.color.drawPitch  = rmesa->r200Screen->frontPitch;
 296       }
 297       break;
 298    case BUFFER_BIT_BACK_LEFT:
 299       if ( rmesa->doPageFlip && rmesa->sarea->pfCurrentPage == 1 ) {
 300         rmesa->state.pixel.readOffset = rmesa->r200Screen->frontOffset;
 301         rmesa->state.pixel.readPitch  = rmesa->r200Screen->frontPitch;
 302         rmesa->state.color.drawOffset = rmesa->r200Screen->frontOffset;
 303         rmesa->state.color.drawPitch  = rmesa->r200Screen->frontPitch;
 304       } else {
 305         rmesa->state.pixel.readOffset = rmesa->r200Screen->backOffset;
 306         rmesa->state.pixel.readPitch  = rmesa->r200Screen->backPitch;
 307         rmesa->state.color.drawOffset = rmesa->r200Screen->backOffset;
 308         rmesa->state.color.drawPitch  = rmesa->r200Screen->backPitch;
 309       }
 310       break;
 311    default:
 312       _mesa_problem(ctx, "Bad bufferBit in %s", __FUNCTION__);
 313       break;
 314    }
 315 }
 316
 317 /* Move locking out to get reasonable span performance (10x better
 318  * than doing this in HW_LOCK above).  WaitForIdle() is the main
 319  * culprit.
 320  */
 321
 322 static void r200SpanRenderStart( GLcontext *ctx )
 323 {
 324    r200ContextPtr rmesa = R200_CONTEXT( ctx );
 325
 326    R200_FIREVERTICES( rmesa );
 327    LOCK_HARDWARE( rmesa );
 328    r200WaitForIdleLocked( rmesa );
 329
 330    /* Read & rewrite the first pixel in the frame buffer.  This should
 331     * be a noop, right?  In fact without this conform fails as reading
 332     * from the framebuffer sometimes produces old results -- the
 333     * on-card read cache gets mixed up and doesn't notice that the
 334     * framebuffer has been updated.
 335     *
 336     * In the worst case this is buggy too as p might get the wrong
 337     * value first time, so really need a hidden pixel somewhere for this.
 338     */
 339    {
 340       int p;
 341       volatile int *read_buf = (volatile int *)(rmesa->dri.screen->pFB +
 342                                                 rmesa->state.pixel.readOffset);
 343       p = *read_buf;
 344       *read_buf = p;
 345    }
 346 }
 347
 348 static void r200SpanRenderFinish( GLcontext *ctx )
 349 {
 350    r200ContextPtr rmesa = R200_CONTEXT( ctx );
 351    _swrast_flush( ctx );
 352    UNLOCK_HARDWARE( rmesa );
 353 }
 354
 355 void r200InitSpanFuncs( GLcontext *ctx )
 356 {
 357    r200ContextPtr rmesa = R200_CONTEXT(ctx);
 358    struct swrast_device_driver *swdd = _swrast_GetDeviceDriverReference(ctx);
 359
 360    swdd->SetBuffer = r200SetBuffer;
 361    swdd->SpanRenderStart          = r200SpanRenderStart;
 362    swdd->SpanRenderFinish         = r200SpanRenderFinish;
 363 }
 364
 365
 366
 367 /**
 368  * Plug in the Get/Put routines for the given driRenderbuffer.
 369  */
 370 void
 371 r200SetSpanFunctions(driRenderbuffer *drb, const GLvisual *vis)
 372 {
 373    if (drb->Base.InternalFormat == GL_RGBA) {
 374       if (vis->redBits == 5 && vis->greenBits == 6 && vis->blueBits == 5) {
 375          r200InitPointers_RGB565(&drb->Base);
 376       }
 377       else {
 378          r200InitPointers_ARGB8888(&drb->Base);
 379       }
 380    }
 381    else if (drb->Base.InternalFormat == GL_DEPTH_COMPONENT16) {
 382       drb->Base.GetRow        = r200ReadDepthSpan_16;
 383       drb->Base.GetValues     = r200ReadDepthPixels_16;
 384       drb->Base.PutRow        = r200WriteDepthSpan_16;
 385       drb->Base.PutMonoRow    = r200WriteMonoDepthSpan_16;
 386       drb->Base.PutValues     = r200WriteDepthPixels_16;
 387       drb->Base.PutMonoValues = NULL;
 388    }
 389    else if (drb->Base.InternalFormat == GL_DEPTH_COMPONENT24) {
 390       drb->Base.GetRow        = r200ReadDepthSpan_24_8;
 391       drb->Base.GetValues     = r200ReadDepthPixels_24_8;
 392       drb->Base.PutRow        = r200WriteDepthSpan_24_8;
 393       drb->Base.PutMonoRow    = r200WriteMonoDepthSpan_24_8;
 394       drb->Base.PutValues     = r200WriteDepthPixels_24_8;
 395       drb->Base.PutMonoValues = NULL;
 396    }
 397    else if (drb->Base.InternalFormat == GL_STENCIL_INDEX8_EXT) {
 398       drb->Base.GetRow        = r200ReadStencilSpan_24_8;
 399       drb->Base.GetValues     = r200ReadStencilPixels_24_8;
 400       drb->Base.PutRow        = r200WriteStencilSpan_24_8;
 401       drb->Base.PutMonoRow    = r200WriteMonoStencilSpan_24_8;
 402       drb->Base.PutValues     = r200WriteStencilPixels_24_8;
 403       drb->Base.PutMonoValues = NULL;
 404    }
 405 }