src/mesa/drivers/dri/mach64/mach64_span.c

   1 /* -*- mode: c; c-basic-offset: 3 -*- */
   2 /*
   3  * Copyright 2000 Gareth Hughes
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * GARETH HUGHES BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
  21  * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /*
  26  * Authors:
  27  *      Gareth Hughes <gareth@valinux.com>
  28  *      Leif Delgass <ldelgass@retinalburn.net>
  29  *      Jos�Fonseca <j_r_fonseca@yahoo.co.uk>
  30  */
  31
  32 #include "mach64_context.h"
  33 #include "mach64_ioctl.h"
  34 #include "mach64_span.h"
  35
  36 #include "swrast/swrast.h"
  37
  38 #define DBG 0
  39
  40 #define LOCAL_VARS                                                      \
  41    mach64ContextPtr mmesa = MACH64_CONTEXT(ctx);                        \
  42    __DRIscreen *sPriv = mmesa->driScreen;                       \
  43    __DRIdrawable *dPriv = mmesa->driDrawable;                   \
  44    driRenderbuffer *drb = (driRenderbuffer *) rb;                       \
  45    GLuint height = dPriv->h;                                            \
  46    GLushort p;                                                          \
  47    (void) p;
  48
  49 #define LOCAL_DEPTH_VARS                                                \
  50    mach64ContextPtr mmesa = MACH64_CONTEXT(ctx);                        \
  51    __DRIdrawable *dPriv = mmesa->driDrawable;                   \
  52    __DRIscreen *driScreen = mmesa->driScreen;                   \
  53    driRenderbuffer *drb = (driRenderbuffer *) rb;                       \
  54    GLuint height = dPriv->h;                                            \
  55    char *buf = (char *)(driScreen->pFB + drb->offset +                  \
  56                         (dPriv->x + dPriv->y * drb->pitch) * 2)
  57
  58 #define LOCAL_STENCIL_VARS      LOCAL_DEPTH_VARS
  59
  60 #define Y_FLIP( _y )    (height - _y - 1)
  61
  62 #define HW_LOCK()
  63
  64 /* FIXME could/should we use dPriv->numClipRects like the other drivers? */
  65 #define HW_CLIPLOOP()                                                   \
  66    do {                                                                 \
  67       int _nc = mmesa->numClipRects;                                    \
  68                                                                         \
  69       while ( _nc-- ) {                                                 \
  70          int minx = mmesa->pClipRects[_nc].x1 - mmesa->drawX;           \
  71          int miny = mmesa->pClipRects[_nc].y1 - mmesa->drawY;           \
  72          int maxx = mmesa->pClipRects[_nc].x2 - mmesa->drawX;           \
  73          int maxy = mmesa->pClipRects[_nc].y2 - mmesa->drawY;
  74
  75 #define HW_ENDCLIPLOOP()                                                \
  76       }                                                                 \
  77    } while (0)
  78
  79 #define HW_UNLOCK()
  80
  81
  82
  83 /* ================================================================
  84  * Color buffer
  85  */
  86
  87 /* 16 bit, RGB565 color spanline and pixel functions
  88  */
  89 #define SPANTMP_PIXEL_FMT GL_RGB
  90 #define SPANTMP_PIXEL_TYPE GL_UNSIGNED_SHORT_5_6_5
  91
  92 #define TAG(x)    mach64##x##_RGB565
  93 #define TAG2(x,y) mach64##x##_RGB565##y
  94 #define GET_PTR(X,Y) (sPriv->pFB + drb->offset          \
  95      + ((dPriv->y + (Y)) * drb->pitch + (dPriv->x + (X))) * drb->cpp)
  96 #include "spantmp2.h"
  97
  98
  99 /* 32 bit, ARGB8888 color spanline and pixel functions
 100  */
 101 /* FIXME the old code always read back alpha as 0xff, i.e. fully opaque.
 102    Was there a reason to do so ? If so that'll won't work with that template... */
 103 #define SPANTMP_PIXEL_FMT GL_BGRA
 104 #define SPANTMP_PIXEL_TYPE GL_UNSIGNED_INT_8_8_8_8_REV
 105
 106 #define TAG(x)    mach64##x##_ARGB8888
 107 #define TAG2(x,y) mach64##x##_ARGB8888##y
 108 #define GET_PTR(X,Y) (sPriv->pFB + drb->offset          \
 109      + ((dPriv->y + (Y)) * drb->pitch + (dPriv->x + (X))) * drb->cpp)
 110 #include "spantmp2.h"
 111
 112
 113 /* ================================================================
 114  * Depth buffer
 115  */
 116
 117 /* 16 bit depthbuffer functions.
 118  */
 119 #define VALUE_TYPE GLushort
 120
 121 #define WRITE_DEPTH( _x, _y, d )                                        \
 122    *(GLushort *)(buf + ((_x) + (_y) * drb->pitch) * 2) = d;
 123
 124 #define READ_DEPTH( d, _x, _y )                                         \
 125    d = *(GLushort *)(buf + ((_x) + (_y) * drb->pitch) * 2);
 126
 127 #define TAG(x) mach64##x##_z16
 128 #include "depthtmp.h"
 129
 130
 131 static void mach64SpanRenderStart( GLcontext *ctx )
 132 {
 133    mach64ContextPtr mmesa = MACH64_CONTEXT(ctx);
 134    LOCK_HARDWARE( mmesa );
 135    FINISH_DMA_LOCKED( mmesa );
 136 }
 137
 138 static void mach64SpanRenderFinish( GLcontext *ctx )
 139 {
 140    mach64ContextPtr mmesa = MACH64_CONTEXT(ctx);
 141    _swrast_flush( ctx );
 142    UNLOCK_HARDWARE( mmesa );
 143 }
 144
 145 void mach64DDInitSpanFuncs( GLcontext *ctx )
 146 {
 147    struct swrast_device_driver *swdd = _swrast_GetDeviceDriverReference(ctx);
 148    swdd->SpanRenderStart        = mach64SpanRenderStart;
 149    swdd->SpanRenderFinish       = mach64SpanRenderFinish;
 150 }
 151
 152
 153 /**
 154  * Plug in the Get/Put routines for the given driRenderbuffer.
 155  */
 156 void
 157 mach64SetSpanFunctions(driRenderbuffer *drb, const GLvisual *vis)
 158 {
 159    if (drb->Base.Format == MESA_FORMAT_RGB565) {
 160       mach64InitPointers_RGB565(&drb->Base);
 161    }
 162    else if (drb->Base.Format == MESA_FORMAT_ARGB8888) {
 163       mach64InitPointers_ARGB8888(&drb->Base);
 164    }
 165    else if (drb->Base.Format == MESA_FORMAT_Z16) {
 166       mach64InitDepthPointers_z16(&drb->Base);
 167    }
 168 }