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 "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    __DRIscreenPrivate *sPriv = mmesa->driScreen;        \
  40    driRenderbuffer *drb = (driRenderbuffer *) rb;       \
  41    const __DRIdrawablePrivate *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    __DRIscreenPrivate *sPriv = mmesa->driScreen;                        \
  56    driRenderbuffer *drb = (driRenderbuffer *) rb;                       \
  57    const __DRIdrawablePrivate *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 WRITE_DEPTH( _x, _y, d )        \
 111    *(GLushort *)(buf + (_x)*2 + (_y)*pitch) = d;
 112
 113 #define READ_DEPTH( d, _x, _y )         \
 114    d = *(GLushort *)(buf + (_x)*2 + (_y)*pitch);
 115
 116 #define TAG(x) mga##x##_z16
 117 #include "depthtmp.h"
 118
 119
 120
 121
 122 /* 32 bit depthbuffer functions.
 123  */
 124 #define WRITE_DEPTH( _x, _y, d )        \
 125    *(GLuint *)(buf + (_x)*4 + (_y)*pitch) = d;
 126
 127 #define READ_DEPTH( d, _x, _y )         \
 128    d = *(GLuint *)(buf + (_x)*4 + (_y)*pitch);
 129
 130 #define TAG(x) mga##x##_z32
 131 #include "depthtmp.h"
 132
 133
 134
 135 /* 24/8 bit interleaved depth/stencil functions
 136  */
 137 #define WRITE_DEPTH( _x, _y, d ) {                      \
 138    GLuint tmp = *(GLuint *)(buf + (_x)*4 + (_y)*pitch); \
 139    tmp &= 0xff;                                         \
 140    tmp |= (d) << 8;                                     \
 141    *(GLuint *)(buf + (_x)*4 + (_y)*pitch) = tmp;                \
 142 }
 143
 144 #define READ_DEPTH( d, _x, _y ) {                               \
 145    d = (*(GLuint *)(buf + (_x)*4 + (_y)*pitch) & ~0xff) >> 8;   \
 146 }
 147
 148 #define TAG(x) mga##x##_z24_s8
 149 #include "depthtmp.h"
 150
 151 #define WRITE_STENCIL( _x, _y, d ) {                    \
 152    GLuint tmp = *(GLuint *)(buf + _x*4 + _y*pitch);     \
 153    tmp &= 0xffffff00;                                   \
 154    tmp |= d & 0xff;                                     \
 155    *(GLuint *)(buf + _x*4 + _y*pitch) = tmp;            \
 156 }
 157
 158 #define READ_STENCIL( d, _x, _y )               \
 159    d = *(GLuint *)(buf + _x*4 + _y*pitch) & 0xff;
 160
 161 #define TAG(x) mga##x##_z24_s8
 162 #include "stenciltmp.h"
 163
 164
 165 static void
 166 mgaSpanRenderStart( GLcontext *ctx )
 167 {
 168    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
 169    FLUSH_BATCH( mmesa );
 170    LOCK_HARDWARE_QUIESCENT( mmesa );
 171 }
 172
 173 static void
 174 mgaSpanRenderFinish( GLcontext *ctx )
 175 {
 176    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
 177    _swrast_flush( ctx );
 178    UNLOCK_HARDWARE( mmesa );
 179 }
 180
 181 /**
 182  * Initialize the driver callbacks for the read / write span functions.
 183  *
 184  * \bug
 185  * To really support RGB888 and RGBA8888 visuals, we need separate read and
 186  * write routines for 888 and 8888.  We also need to determine whether or not
 187  * the visual has destination alpha.
 188  */
 189 void mgaDDInitSpanFuncs( GLcontext *ctx )
 190 {
 191    struct swrast_device_driver *swdd = _swrast_GetDeviceDriverReference(ctx);
 192    swdd->SpanRenderStart = mgaSpanRenderStart;
 193    swdd->SpanRenderFinish = mgaSpanRenderFinish;
 194 }
 195
 196
 197 /**
 198  * Plug in the Get/Put routines for the given driRenderbuffer.
 199  */
 200 void
 201 mgaSetSpanFunctions(driRenderbuffer *drb, const GLvisual *vis)
 202 {
 203    if (drb->Base.InternalFormat == GL_RGBA) {
 204       if (vis->redBits == 5 && vis->greenBits == 6 && vis->blueBits == 5) {
 205          mgaInitPointers_565(&drb->Base);
 206       }
 207       else {
 208          mgaInitPointers_8888(&drb->Base);
 209       }
 210    }
 211    else if (drb->Base.InternalFormat == GL_DEPTH_COMPONENT16) {
 212       mgaInitDepthPointers_z16(&drb->Base);
 213    }
 214    else if (drb->Base.InternalFormat == GL_DEPTH_COMPONENT24) {
 215       mgaInitDepthPointers_z24_s8(&drb->Base);
 216    }
 217    else if (drb->Base.InternalFormat == GL_DEPTH_COMPONENT32) {
 218       mgaInitDepthPointers_z32(&drb->Base);
 219    }
 220    else if (drb->Base.InternalFormat == GL_STENCIL_INDEX8_EXT) {
 221       mgaInitStencilPointers_z24_s8(&drb->Base);
 222    }
 223 }