src/mesa/drivers/dri/mga/mgaspan.c

   1 /*
   2  * Copyright 2000-2001 VA Linux Systems, Inc.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  19  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Keith Whitwell <keith@tungstengraphics.com>
  26  */
  27 /* $XFree86: xc/lib/GL/mesa/src/drv/mga/mgaspan.c,v 1.11 2002/10/30 12:51:36 alanh Exp $ */
  28
  29 #include "mtypes.h"
  30 #include "mgadd.h"
  31 #include "mgacontext.h"
  32 #include "mgaspan.h"
  33 #include "mgaioctl.h"
  34 #include "swrast/swrast.h"
  35
  36 #define DBG 0
  37
  38 #define LOCAL_VARS                                      \
  39    __DRIdrawablePrivate *dPriv = mmesa->mesa_drawable;  \
  40    mgaScreenPrivate *mgaScreen = mmesa->mgaScreen;      \
  41    __DRIscreenPrivate *sPriv = mmesa->driScreen;        \
  42    GLuint pitch = mgaScreen->frontPitch;                \
  43    GLuint height = dPriv->h;                            \
  44    char *read_buf = (char *)(sPriv->pFB +               \
  45                         mmesa->readOffset +             \
  46                         dPriv->x * mgaScreen->cpp +     \
  47                         dPriv->y * pitch);              \
  48    char *buf = (char *)(sPriv->pFB +                    \
  49                         mmesa->drawOffset +             \
  50                         dPriv->x * mgaScreen->cpp +     \
  51                         dPriv->y * pitch);              \
  52    GLuint p;                                            \
  53    (void) read_buf; (void) buf; (void) p
  54
  55
  56
  57 #define LOCAL_DEPTH_VARS                                                \
  58    __DRIdrawablePrivate *dPriv = mmesa->mesa_drawable;                  \
  59    mgaScreenPrivate *mgaScreen = mmesa->mgaScreen;                      \
  60    __DRIscreenPrivate *sPriv = mmesa->driScreen;                        \
  61    GLuint pitch = mgaScreen->frontPitch;                                \
  62    GLuint height = dPriv->h;                                            \
  63    char *buf = (char *)(sPriv->pFB +                                    \
  64                         mgaScreen->depthOffset +                        \
  65                         dPriv->x * mgaScreen->cpp +                     \
  66                         dPriv->y * pitch)
  67
  68 #define LOCAL_STENCIL_VARS LOCAL_DEPTH_VARS
  69
  70 #define CLIPPIXEL(_x,_y) (_x >= minx && _x < maxx && \
  71                           _y >= miny && _y < maxy)
  72
  73 #define CLIPSPAN( _x, _y, _n, _x1, _n1, _i )                            \
  74    if ( _y < miny || _y >= maxy ) {                                     \
  75       _n1 = 0, _x1 = x;                                                 \
  76    } else {                                                             \
  77       _n1 = _n;                                                         \
  78       _x1 = _x;                                                         \
  79       if ( _x1 < minx ) _i += (minx-_x1), n1 -= (minx-_x1), _x1 = minx; \
  80       if ( _x1 + _n1 >= maxx ) n1 -= (_x1 + n1 - maxx);                 \
  81    }
  82
  83
  84 #define HW_LOCK()                               \
  85    mgaContextPtr mmesa = MGA_CONTEXT(ctx);      \
  86    FLUSH_BATCH(mmesa);                          \
  87    LOCK_HARDWARE_QUIESCENT(mmesa);
  88
  89
  90 #define HW_CLIPLOOP()                                           \
  91   do {                                                          \
  92     int _nc = mmesa->numClipRects;                              \
  93     while (_nc--) {                                             \
  94        int minx = mmesa->pClipRects[_nc].x1 - mmesa->drawX;     \
  95        int miny = mmesa->pClipRects[_nc].y1 - mmesa->drawY;     \
  96        int maxx = mmesa->pClipRects[_nc].x2 - mmesa->drawX;     \
  97        int maxy = mmesa->pClipRects[_nc].y2 - mmesa->drawY;
  98
  99 #define HW_ENDCLIPLOOP()                        \
 100     }                                           \
 101   } while (0)
 102
 103 #define HW_UNLOCK()                             \
 104     UNLOCK_HARDWARE(mmesa);
 105
 106
 107
 108
 109
 110
 111 #define Y_FLIP(_y) (height - _y - 1)
 112
 113 /* 16 bit, RGB565 color spanline and pixel functions
 114  */
 115
 116 #define GET_SRC_PTR(_x, _y) (read_buf + _x * 2 + _y * pitch)
 117 #define GET_DST_PTR(_x, _y) (     buf + _x * 2 + _y * pitch)
 118 #define SPANTMP_PIXEL_FMT GL_RGB
 119 #define SPANTMP_PIXEL_TYPE GL_UNSIGNED_SHORT_5_6_5
 120
 121 #define TAG(x)    mga##x##_565
 122 #define TAG2(x,y) mga##x##_565##y
 123 #include "spantmp2.h"
 124
 125 /* 32 bit, ARGB8888 color spanline and pixel functions
 126  */
 127
 128 #define GET_SRC_PTR(_x, _y) (read_buf + _x * 4 + _y * pitch)
 129 #define GET_DST_PTR(_x, _y) (     buf + _x * 4 + _y * pitch)
 130 #define SPANTMP_PIXEL_FMT GL_BGRA
 131 #define SPANTMP_PIXEL_TYPE GL_UNSIGNED_INT_8_8_8_8_REV
 132
 133 #define TAG(x)    mga##x##_8888
 134 #define TAG2(x,y) mga##x##_8888##y
 135 #include "spantmp2.h"
 136
 137
 138 /* 16 bit depthbuffer functions.
 139  */
 140 #define WRITE_DEPTH( _x, _y, d )        \
 141    *(GLushort *)(buf + (_x)*2 + (_y)*pitch) = d;
 142
 143 #define READ_DEPTH( d, _x, _y )         \
 144    d = *(GLushort *)(buf + (_x)*2 + (_y)*pitch);
 145
 146 #define TAG(x) mga##x##_16
 147 #include "depthtmp.h"
 148
 149
 150
 151
 152 /* 32 bit depthbuffer functions.
 153  */
 154 #define WRITE_DEPTH( _x, _y, d )        \
 155    *(GLuint *)(buf + (_x)*4 + (_y)*pitch) = d;
 156
 157 #define READ_DEPTH( d, _x, _y )         \
 158    d = *(GLuint *)(buf + (_x)*4 + (_y)*pitch);
 159
 160 #define TAG(x) mga##x##_32
 161 #include "depthtmp.h"
 162
 163
 164
 165 /* 24/8 bit interleaved depth/stencil functions
 166  */
 167 #define WRITE_DEPTH( _x, _y, d ) {                      \
 168    GLuint tmp = *(GLuint *)(buf + (_x)*4 + (_y)*pitch); \
 169    tmp &= 0xff;                                         \
 170    tmp |= (d) << 8;                                     \
 171    *(GLuint *)(buf + (_x)*4 + (_y)*pitch) = tmp;                \
 172 }
 173
 174 #define READ_DEPTH( d, _x, _y ) {                               \
 175    d = (*(GLuint *)(buf + (_x)*4 + (_y)*pitch) & ~0xff) >> 8;   \
 176 }
 177
 178 #define TAG(x) mga##x##_24_8
 179 #include "depthtmp.h"
 180
 181 #define WRITE_STENCIL( _x, _y, d ) {                    \
 182    GLuint tmp = *(GLuint *)(buf + _x*4 + _y*pitch);     \
 183    tmp &= 0xffffff00;                                   \
 184    tmp |= d & 0xff;                                     \
 185    *(GLuint *)(buf + _x*4 + _y*pitch) = tmp;            \
 186 }
 187
 188 #define READ_STENCIL( d, _x, _y )               \
 189    d = *(GLuint *)(buf + _x*4 + _y*pitch) & 0xff;
 190
 191 #define TAG(x) mga##x##_24_8
 192 #include "stenciltmp.h"
 193
 194
 195
 196 /*
 197  * This function is called to specify which buffer to read and write
 198  * for software rasterization (swrast) fallbacks.  This doesn't necessarily
 199  * correspond to glDrawBuffer() or glReadBuffer() calls.
 200  */
 201 static void mgaDDSetBuffer(GLcontext *ctx, GLframebuffer *buffer,
 202                            GLuint bufferBit)
 203 {
 204    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
 205    unsigned int   offset;
 206
 207    assert((bufferBit == BUFFER_BIT_FRONT_LEFT) || (bufferBit == BUFFER_BIT_BACK_LEFT));
 208
 209    offset = (bufferBit == BUFFER_BIT_FRONT_LEFT)
 210        ? mmesa->mgaScreen->frontOffset
 211        : mmesa->mgaScreen->backOffset;
 212
 213    mmesa->drawOffset = offset;
 214    mmesa->readOffset = offset;
 215
 216    assert( (buffer == mmesa->driDrawable->driverPrivate)
 217            || (buffer == mmesa->driReadable->driverPrivate) );
 218
 219    mmesa->mesa_drawable = (buffer == mmesa->driDrawable->driverPrivate)
 220        ? mmesa->driDrawable : mmesa->driReadable;
 221 }
 222
 223 /**
 224  * Initialize the driver callbacks for the read / write span functions.
 225  *
 226  * \bug
 227  * To really support RGB888 and RGBA8888 visuals, we need separate read and
 228  * write routines for 888 and 8888.  We also need to determine whether or not
 229  * the visual has destination alpha.
 230  */
 231 void mgaDDInitSpanFuncs( GLcontext *ctx )
 232 {
 233    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
 234    struct swrast_device_driver *swdd = _swrast_GetDeviceDriverReference(ctx);
 235
 236    swdd->SetBuffer = mgaDDSetBuffer;
 237
 238    switch (mmesa->mgaScreen->cpp) {
 239    case 2:
 240 #if 0
 241       mgaInitPointers_565( swdd );
 242       swdd->ReadDepthSpan = mgaReadDepthSpan_16;
 243       swdd->WriteDepthSpan = mgaWriteDepthSpan_16;
 244       swdd->ReadDepthPixels = mgaReadDepthPixels_16;
 245       swdd->WriteDepthPixels = mgaWriteDepthPixels_16;
 246 #endif
 247       break;
 248
 249    case 4:
 250 #if 0
 251       mgaInitPointers_8888( swdd );
 252
 253       if (!mmesa->hw_stencil) {
 254          swdd->ReadDepthSpan = mgaReadDepthSpan_32;
 255          swdd->WriteDepthSpan = mgaWriteDepthSpan_32;
 256          swdd->ReadDepthPixels = mgaReadDepthPixels_32;
 257          swdd->WriteDepthPixels = mgaWriteDepthPixels_32;
 258       } else {
 259          swdd->ReadDepthSpan = mgaReadDepthSpan_24_8;
 260          swdd->WriteDepthSpan = mgaWriteDepthSpan_24_8;
 261          swdd->ReadDepthPixels = mgaReadDepthPixels_24_8;
 262          swdd->WriteDepthPixels = mgaWriteDepthPixels_24_8;
 263
 264          swdd->ReadStencilSpan = mgaReadStencilSpan_24_8;
 265          swdd->WriteStencilSpan = mgaWriteStencilSpan_24_8;
 266          swdd->ReadStencilPixels = mgaReadStencilPixels_24_8;
 267          swdd->WriteStencilPixels = mgaWriteStencilPixels_24_8;
 268       }
 269 #endif
 270       break;
 271    }
 272 }
 273
 274
 275
 276 /**
 277  * Plug in the Get/Put routines for the given driRenderbuffer.
 278  */
 279 void
 280 mgaSetSpanFunctions(driRenderbuffer *drb, const GLvisual *vis)
 281 {
 282    if (drb->Base.InternalFormat == GL_RGBA) {
 283       if (vis->redBits == 5 && vis->greenBits == 6 && vis->blueBits == 5) {
 284          mgaInitPointers_565(&drb->Base);
 285       }
 286       else {
 287          mgaInitPointers_8888(&drb->Base);
 288       }
 289    }
 290    else if (drb->Base.InternalFormat == GL_DEPTH_COMPONENT16) {
 291       drb->Base.GetRow        = mgaReadDepthSpan_16;
 292       drb->Base.GetValues     = mgaReadDepthPixels_16;
 293       drb->Base.PutRow        = mgaWriteDepthSpan_16;
 294       drb->Base.PutMonoRow    = mgaWriteMonoDepthSpan_16;
 295       drb->Base.PutValues     = mgaWriteDepthPixels_16;
 296       drb->Base.PutMonoValues = NULL;
 297    }
 298    else if (drb->Base.InternalFormat == GL_DEPTH_COMPONENT24) {
 299       drb->Base.GetRow        = mgaReadDepthSpan_24_8;
 300       drb->Base.GetValues     = mgaReadDepthPixels_24_8;
 301       drb->Base.PutRow        = mgaWriteDepthSpan_24_8;
 302       drb->Base.PutMonoRow    = mgaWriteMonoDepthSpan_24_8;
 303       drb->Base.PutValues     = mgaWriteDepthPixels_24_8;
 304       drb->Base.PutMonoValues = NULL;
 305    }
 306    else if (drb->Base.InternalFormat == GL_DEPTH_COMPONENT32) {
 307       drb->Base.GetRow        = mgaReadDepthSpan_32;
 308       drb->Base.GetValues     = mgaReadDepthPixels_32;
 309       drb->Base.PutRow        = mgaWriteDepthSpan_32;
 310       drb->Base.PutMonoRow    = mgaWriteMonoDepthSpan_32;
 311       drb->Base.PutValues     = mgaWriteDepthPixels_32;
 312       drb->Base.PutMonoValues = NULL;
 313    }
 314    else if (drb->Base.InternalFormat == GL_STENCIL_INDEX8_EXT) {
 315       drb->Base.GetRow        = mgaReadStencilSpan_24_8;
 316       drb->Base.GetValues     = mgaReadStencilPixels_24_8;
 317       drb->Base.PutRow        = mgaWriteStencilSpan_24_8;
 318       drb->Base.PutMonoRow    = mgaWriteMonoStencilSpan_24_8;
 319       drb->Base.PutValues     = mgaWriteStencilPixels_24_8;
 320       drb->Base.PutMonoValues = NULL;
 321    }
 322 }