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

   1 /*
   2 Copyright (C) The Weather Channel, Inc.  2002.  All Rights Reserved.
   3
   4 The Weather Channel (TM) funded Tungsten Graphics to develop the
   5 initial release of the Radeon 8500 driver under the XFree86 license.
   6 This notice must be preserved.
   7
   8 Permission is hereby granted, free of charge, to any person obtaining
   9 a copy of this software and associated documentation files (the
  10 "Software"), to deal in the Software without restriction, including
  11 without limitation the rights to use, copy, modify, merge, publish,
  12 distribute, sublicense, and/or sell copies of the Software, and to
  13 permit persons to whom the Software is furnished to do so, subject to
  14 the following conditions:
  15
  16 The above copyright notice and this permission notice (including the
  17 next paragraph) shall be included in all copies or substantial
  18 portions of the Software.
  19
  20 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  23 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  24 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27
  28 **************************************************************************/
  29
  30 /*
  31  * Authors:
  32  *   Keith Whitwell <keith@tungstengraphics.com>
  33  */
  34
  35 #include "main/glheader.h"
  36 #include "main/imports.h"
  37 #include "main/colormac.h"
  38 #include "swrast/swrast.h"
  39
  40 #include "r200_context.h"
  41 #include "r200_ioctl.h"
  42 #include "r200_state.h"
  43 #include "r200_span.h"
  44 #include "r200_tex.h"
  45
  46 #define DBG 0
  47
  48 /*
  49  * Note that all information needed to access pixels in a renderbuffer
  50  * should be obtained through the gl_renderbuffer parameter, not per-context
  51  * information.
  52  */
  53 #define LOCAL_VARS                                              \
  54    driRenderbuffer *drb = (driRenderbuffer *) rb;               \
  55    const __DRIdrawablePrivate *dPriv = drb->dPriv;              \
  56    const GLuint bottom = dPriv->h - 1;                          \
  57    GLubyte *buf = (GLubyte *) drb->flippedData                  \
  58       + (dPriv->y * drb->flippedPitch + dPriv->x) * drb->cpp;   \
  59    GLuint p;                                                    \
  60    (void) p;
  61
  62 #define LOCAL_DEPTH_VARS                                \
  63    driRenderbuffer *drb = (driRenderbuffer *) rb;       \
  64    const __DRIdrawablePrivate *dPriv = drb->dPriv;      \
  65    const GLuint bottom = dPriv->h - 1;                  \
  66    GLuint xo = dPriv->x;                                \
  67    GLuint yo = dPriv->y;                                \
  68    GLubyte *buf = (GLubyte *) drb->Base.Data;
  69
  70 #define LOCAL_STENCIL_VARS LOCAL_DEPTH_VARS
  71
  72 #define Y_FLIP(Y) (bottom - (Y))
  73
  74 #define HW_LOCK()
  75
  76 #define HW_UNLOCK()
  77
  78
  79
  80 /* ================================================================
  81  * Color buffer
  82  */
  83
  84 /* 16 bit, RGB565 color spanline and pixel functions
  85  */
  86 #define SPANTMP_PIXEL_FMT GL_RGB
  87 #define SPANTMP_PIXEL_TYPE GL_UNSIGNED_SHORT_5_6_5
  88
  89 #define TAG(x)    r200##x##_RGB565
  90 #define TAG2(x,y) r200##x##_RGB565##y
  91 #define GET_PTR(X,Y) (buf + ((Y) * drb->flippedPitch + (X)) * 2)
  92 #include "spantmp2.h"
  93
  94 /* 32 bit, ARGB8888 color spanline and pixel functions
  95  */
  96 #define SPANTMP_PIXEL_FMT GL_BGRA
  97 #define SPANTMP_PIXEL_TYPE GL_UNSIGNED_INT_8_8_8_8_REV
  98
  99 #define TAG(x)    r200##x##_ARGB8888
 100 #define TAG2(x,y) r200##x##_ARGB8888##y
 101 #define GET_PTR(X,Y) (buf + ((Y) * drb->flippedPitch + (X)) * 4)
 102 #include "spantmp2.h"
 103
 104
 105 /* ================================================================
 106  * Depth buffer
 107  */
 108
 109 /* The Radeon family has depth tiling on all the time, so we have to convert
 110  * the x,y coordinates into the memory bus address (mba) in the same
 111  * manner as the engine.  In each case, the linear block address (ba)
 112  * is calculated, and then wired with x and y to produce the final
 113  * memory address.
 114  * The chip will do address translation on its own if the surface registers
 115  * are set up correctly. It is not quite enough to get it working with hyperz too...
 116  */
 117
 118 /* extract bit 'b' of x, result is zero or one */
 119 #define BIT(x,b) ((x & (1<<b))>>b)
 120
 121 static GLuint
 122 r200_mba_z32( driRenderbuffer *drb, GLint x, GLint y )
 123 {
 124    GLuint pitch = drb->pitch;
 125    if (drb->depthHasSurface) {
 126       return 4 * (x + y * pitch);
 127    }
 128    else {
 129       GLuint b = ((y & 0x7FF) >> 4) * ((pitch & 0xFFF) >> 5) + ((x & 0x7FF) >> 5);
 130       GLuint a =
 131          (BIT(x,0) << 2) |
 132          (BIT(y,0) << 3) |
 133          (BIT(x,1) << 4) |
 134          (BIT(y,1) << 5) |
 135          (BIT(x,3) << 6) |
 136          (BIT(x,4) << 7) |
 137          (BIT(x,2) << 8) |
 138          (BIT(y,2) << 9) |
 139          (BIT(y,3) << 10) |
 140          (((pitch & 0x20) ? (b & 0x01) : ((b & 0x01) ^ (BIT(y,4)))) << 11) |
 141          ((b >> 1) << 12);
 142       return a;
 143    }
 144 }
 145
 146 static GLuint
 147 r200_mba_z16( driRenderbuffer *drb, GLint x, GLint y )
 148 {
 149    GLuint pitch = drb->pitch;
 150    if (drb->depthHasSurface) {
 151       return 2 * (x + y * pitch);
 152    }
 153    else {
 154       GLuint b = ((y & 0x7FF) >> 4) * ((pitch & 0xFFF) >> 6) + ((x & 0x7FF) >> 6);
 155       GLuint a =
 156          (BIT(x,0) << 1) |
 157          (BIT(y,0) << 2) |
 158          (BIT(x,1) << 3) |
 159          (BIT(y,1) << 4) |
 160          (BIT(x,2) << 5) |
 161          (BIT(x,4) << 6) |
 162          (BIT(x,5) << 7) |
 163          (BIT(x,3) << 8) |
 164          (BIT(y,2) << 9) |
 165          (BIT(y,3) << 10) |
 166          (((pitch & 0x40) ? (b & 0x01) : ((b & 0x01) ^ (BIT(y,4)))) << 11) |
 167          ((b >> 1) << 12);
 168       return a;
 169    }
 170 }
 171
 172
 173 /* 16-bit depth buffer functions
 174  */
 175 #define VALUE_TYPE GLushort
 176
 177 #define WRITE_DEPTH( _x, _y, d )                                        \
 178    *(GLushort *)(buf + r200_mba_z16( drb, _x + xo, _y + yo )) = d;
 179
 180 #define READ_DEPTH( d, _x, _y )                                         \
 181    d = *(GLushort *)(buf + r200_mba_z16( drb, _x + xo, _y + yo ));
 182
 183 #define TAG(x) r200##x##_z16
 184 #include "depthtmp.h"
 185
 186
 187 /* 24 bit depth, 8 bit stencil depthbuffer functions
 188  */
 189 #define VALUE_TYPE GLuint
 190
 191 #define WRITE_DEPTH( _x, _y, d )                                        \
 192 do {                                                                    \
 193    GLuint offset = r200_mba_z32( drb, _x + xo, _y + yo );               \
 194    GLuint tmp = *(GLuint *)(buf + offset);                              \
 195    tmp &= 0xff000000;                                                   \
 196    tmp |= ((d) & 0x00ffffff);                                           \
 197    *(GLuint *)(buf + offset) = tmp;                                     \
 198 } while (0)
 199
 200 #define READ_DEPTH( d, _x, _y )                                         \
 201    d = *(GLuint *)(buf + r200_mba_z32( drb, _x + xo,                    \
 202                                          _y + yo )) & 0x00ffffff;
 203
 204 #define TAG(x) r200##x##_z24_s8
 205 #include "depthtmp.h"
 206
 207
 208 /* ================================================================
 209  * Stencil buffer
 210  */
 211
 212 /* 24 bit depth, 8 bit stencil depthbuffer functions
 213  */
 214 #define WRITE_STENCIL( _x, _y, d )                                      \
 215 do {                                                                    \
 216    GLuint offset = r200_mba_z32( drb, _x + xo, _y + yo );               \
 217    GLuint tmp = *(GLuint *)(buf + offset);                              \
 218    tmp &= 0x00ffffff;                                                   \
 219    tmp |= (((d) & 0xff) << 24);                                         \
 220    *(GLuint *)(buf + offset) = tmp;                                     \
 221 } while (0)
 222
 223 #define READ_STENCIL( d, _x, _y )                                       \
 224 do {                                                                    \
 225    GLuint offset = r200_mba_z32( drb, _x + xo, _y + yo );               \
 226    GLuint tmp = *(GLuint *)(buf + offset);                              \
 227    tmp &= 0xff000000;                                                   \
 228    d = tmp >> 24;                                                       \
 229 } while (0)
 230
 231 #define TAG(x) r200##x##_z24_s8
 232 #include "stenciltmp.h"
 233
 234
 235 /* Move locking out to get reasonable span performance (10x better
 236  * than doing this in HW_LOCK above).  WaitForIdle() is the main
 237  * culprit.
 238  */
 239
 240 static void r200SpanRenderStart( GLcontext *ctx )
 241 {
 242    r200ContextPtr rmesa = R200_CONTEXT( ctx );
 243
 244    R200_FIREVERTICES( rmesa );
 245    LOCK_HARDWARE( rmesa );
 246    r200WaitForIdleLocked( rmesa );
 247
 248    /* Read & rewrite the first pixel in the frame buffer.  This should
 249     * be a noop, right?  In fact without this conform fails as reading
 250     * from the framebuffer sometimes produces old results -- the
 251     * on-card read cache gets mixed up and doesn't notice that the
 252     * framebuffer has been updated.
 253     *
 254     * In the worst case this is buggy too as p might get the wrong
 255     * value first time, so really need a hidden pixel somewhere for this.
 256     */
 257    {
 258       int p;
 259       driRenderbuffer *drb =
 260          (driRenderbuffer *) ctx->WinSysDrawBuffer->_ColorDrawBuffers[0];
 261       volatile int *buf =
 262          (volatile int *)(rmesa->dri.screen->pFB + drb->offset);
 263       p = *buf;
 264       *buf = p;
 265    }
 266 }
 267
 268 static void r200SpanRenderFinish( GLcontext *ctx )
 269 {
 270    r200ContextPtr rmesa = R200_CONTEXT( ctx );
 271    _swrast_flush( ctx );
 272    UNLOCK_HARDWARE( rmesa );
 273 }
 274
 275 void r200InitSpanFuncs( GLcontext *ctx )
 276 {
 277    struct swrast_device_driver *swdd = _swrast_GetDeviceDriverReference(ctx);
 278    swdd->SpanRenderStart          = r200SpanRenderStart;
 279    swdd->SpanRenderFinish         = r200SpanRenderFinish;
 280 }
 281
 282
 283
 284 /**
 285  * Plug in the Get/Put routines for the given driRenderbuffer.
 286  */
 287 void
 288 radeonSetSpanFunctions(driRenderbuffer *drb, const GLvisual *vis)
 289 {
 290    if (drb->Base.InternalFormat == GL_RGBA) {
 291       if (vis->redBits == 5 && vis->greenBits == 6 && vis->blueBits == 5) {
 292          r200InitPointers_RGB565(&drb->Base);
 293       }
 294       else {
 295          r200InitPointers_ARGB8888(&drb->Base);
 296       }
 297    }
 298    else if (drb->Base.InternalFormat == GL_DEPTH_COMPONENT16) {
 299       r200InitDepthPointers_z16(&drb->Base);
 300    }
 301    else if (drb->Base.InternalFormat == GL_DEPTH_COMPONENT24) {
 302       r200InitDepthPointers_z24_s8(&drb->Base);
 303    }
 304    else if (drb->Base.InternalFormat == GL_STENCIL_INDEX8_EXT) {
 305       r200InitStencilPointers_z24_s8(&drb->Base);
 306    }
 307 }