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
  28 #include "main/mtypes.h"
  29 #include "mgadd.h"
  30 #include "mgacontext.h"
  31 #include "mgaspan.h"
  32 #include "mgaioctl.h"
  33 #include "swrast/swrast.h"
  34
  35 #define DBG 0
  36
  37 #define LOCAL_VARS                                      \
  38    mgaContextPtr mmesa = MGA_CONTEXT(ctx);              \
  39    __DRIscreen *sPriv = mmesa->driScreen;       \
  40    driRenderbuffer *drb = (driRenderbuffer *) rb;       \
  41    const __DRIdrawable *dPriv = drb->dPriv;     \
  42    GLuint pitch = drb->pitch;                           \
  43    GLuint height = dPriv->h;                            \
  44    char *buf = (char *)(sPriv->pFB +                    \
  45                         drb->offset +                   \
  46                         dPriv->x * drb->cpp +           \
  47                         dPriv->y * pitch);              \
  48    GLuint p;                                            \
  49    (void) buf; (void) p
  50
  51
  52
  53 #define LOCAL_DEPTH_VARS                                                \
  54    mgaContextPtr mmesa = MGA_CONTEXT(ctx);                              \
  55    __DRIscreen *sPriv = mmesa->driScreen;                       \
  56    driRenderbuffer *drb = (driRenderbuffer *) rb;                       \
  57    const __DRIdrawable *dPriv = drb->dPriv;                     \
  58    GLuint pitch = drb->pitch;                                           \
  59    GLuint height = dPriv->h;                                            \
  60    char *buf = (char *)(sPriv->pFB +                                    \
  61                         drb->offset +                                   \
  62                         dPriv->x * drb->cpp +                           \
  63                         dPriv->y * pitch)
  64
  65 #define LOCAL_STENCIL_VARS LOCAL_DEPTH_VARS
  66
  67 #define HW_LOCK()
  68
  69 /* FIXME could/should we use dPriv->numClipRects like the other drivers? */
  70 #define HW_CLIPLOOP()                                           \
  71   do {                                                          \
  72     int _nc = mmesa->numClipRects;                              \
  73     while (_nc--) {                                             \
  74        int minx = mmesa->pClipRects[_nc].x1 - mmesa->drawX;     \
  75        int miny = mmesa->pClipRects[_nc].y1 - mmesa->drawY;     \
  76        int maxx = mmesa->pClipRects[_nc].x2 - mmesa->drawX;     \
  77        int maxy = mmesa->pClipRects[_nc].y2 - mmesa->drawY;
  78
  79 #define HW_ENDCLIPLOOP()                        \
  80     }                                           \
  81   } while (0)
  82
  83 #define HW_UNLOCK()
  84
  85
  86
  87 #define Y_FLIP(_y) (height - _y - 1)
  88
  89 /* 16 bit, RGB565 color spanline and pixel functions
  90  */
  91 #define SPANTMP_PIXEL_FMT GL_RGB
  92 #define SPANTMP_PIXEL_TYPE GL_UNSIGNED_SHORT_5_6_5
  93
  94 #define TAG(x)    mga##x##_565
  95 #define TAG2(x,y) mga##x##_565##y
  96 #include "spantmp2.h"
  97
  98 /* 32 bit, ARGB8888 color spanline and pixel functions
  99  */
 100 #define SPANTMP_PIXEL_FMT GL_BGRA
 101 #define SPANTMP_PIXEL_TYPE GL_UNSIGNED_INT_8_8_8_8_REV
 102
 103 #define TAG(x)    mga##x##_8888
 104 #define TAG2(x,y) mga##x##_8888##y
 105 #include "spantmp2.h"
 106
 107
 108 /* 16 bit depthbuffer functions.
 109  */
 110 #define VALUE_TYPE GLushort
 111
 112 #define WRITE_DEPTH( _x, _y, d )        \
 113    *(GLushort *)(buf + (_x)*2 + (_y)*pitch) = d;
 114
 115 #define READ_DEPTH( d, _x, _y )         \
 116    d = *(GLushort *)(buf + (_x)*2 + (_y)*pitch);
 117
 118 #define TAG(x) mga##x##_z16
 119 #include "depthtmp.h"
 120
 121
 122
 123
 124 /* 32 bit depthbuffer functions.
 125  */
 126 #define VALUE_TYPE GLuint
 127
 128 #define WRITE_DEPTH( _x, _y, d )        \
 129    *(GLuint *)(buf + (_x)*4 + (_y)*pitch) = d;
 130
 131 #define READ_DEPTH( d, _x, _y )         \
 132    d = *(GLuint *)(buf + (_x)*4 + (_y)*pitch);
 133
 134 #define TAG(x) mga##x##_z32
 135 #include "depthtmp.h"
 136
 137
 138
 139 /* 24/8 bit interleaved depth/stencil functions
 140  */
 141 #define VALUE_TYPE GLuint
 142
 143 #define WRITE_DEPTH( _x, _y, d ) {                      \
 144    GLuint tmp = *(GLuint *)(buf + (_x)*4 + (_y)*pitch); \
 145    tmp &= 0xff;                                         \
 146    tmp |= (d) << 8;                                     \
 147    *(GLuint *)(buf + (_x)*4 + (_y)*pitch) = tmp;                \
 148 }
 149
 150 #define READ_DEPTH( d, _x, _y ) {                               \
 151    d = (*(GLuint *)(buf + (_x)*4 + (_y)*pitch) & ~0xff) >> 8;   \
 152 }
 153
 154 #define TAG(x) mga##x##_z24_s8
 155 #include "depthtmp.h"
 156
 157 #define WRITE_STENCIL( _x, _y, d ) {                    \
 158    GLuint tmp = *(GLuint *)(buf + _x*4 + _y*pitch);     \
 159    tmp &= 0xffffff00;                                   \
 160    tmp |= d & 0xff;                                     \
 161    *(GLuint *)(buf + _x*4 + _y*pitch) = tmp;            \
 162 }
 163
 164 #define READ_STENCIL( d, _x, _y )               \
 165    d = *(GLuint *)(buf + _x*4 + _y*pitch) & 0xff;
 166
 167 #define TAG(x) mga##x##_z24_s8
 168 #include "stenciltmp.h"
 169
 170
 171 static void
 172 mgaSpanRenderStart( GLcontext *ctx )
 173 {
 174    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
 175    FLUSH_BATCH( mmesa );
 176    LOCK_HARDWARE_QUIESCENT( mmesa );
 177 }
 178
 179 static void
 180 mgaSpanRenderFinish( GLcontext *ctx )
 181 {
 182    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
 183    _swrast_flush( ctx );
 184    UNLOCK_HARDWARE( mmesa );
 185 }
 186
 187 /**
 188  * Initialize the driver callbacks for the read / write span functions.
 189  *
 190  * \bug
 191  * To really support RGB888 and RGBA8888 visuals, we need separate read and
 192  * write routines for 888 and 8888.  We also need to determine whether or not
 193  * the visual has destination alpha.
 194  */
 195 void mgaDDInitSpanFuncs( GLcontext *ctx )
 196 {
 197    struct swrast_device_driver *swdd = _swrast_GetDeviceDriverReference(ctx);
 198    swdd->SpanRenderStart = mgaSpanRenderStart;
 199    swdd->SpanRenderFinish = mgaSpanRenderFinish;
 200 }
 201
 202
 203 /**
 204  * Plug in the Get/Put routines for the given driRenderbuffer.
 205  */
 206 void
 207 mgaSetSpanFunctions(driRenderbuffer *drb, const GLvisual *vis)
 208 {
 209    if (drb->Base.Format == MESA_FORMAT_RGB565) {
 210       mgaInitPointers_565(&drb->Base);
 211    }
 212    else if (drb->Base.Format == MESA_FORMAT_ARGB8888) {
 213       mgaInitPointers_8888(&drb->Base);
 214    }
 215    else if (drb->Base.Format == MESA_FORMAT_Z16) {
 216       mgaInitDepthPointers_z16(&drb->Base);
 217    }
 218    else if (drb->Base.Format == MESA_FORMAT_Z24_S8) {
 219       mgaInitDepthPointers_z24_s8(&drb->Base);
 220    }
 221    else if (drb->Base.Format == MESA_FORMAT_Z32) {
 222       mgaInitDepthPointers_z32(&drb->Base);
 223    }
 224    else if (drb->Base.Format == MESA_FORMAT_S8) {
 225       mgaInitStencilPointers_z24_s8(&drb->Base);
 226    }
 227 }