src/mesa/drivers/dri/sis/sis_dd.c

   1 /**************************************************************************
   2
   3 Copyright 2000 Silicon Integrated Systems Corp, Inc., HsinChu, Taiwan.
   4 Copyright 2003 Eric Anholt
   5 All Rights Reserved.
   6
   7 Permission is hereby granted, free of charge, to any person obtaining a
   8 copy of this software and associated documentation files (the "Software"),
   9 to deal in the Software without restriction, including without limitation
  10 on the rights to use, copy, modify, merge, publish, distribute, sub
  11 license, and/or sell copies of the Software, and to permit persons to whom
  12 the Software is furnished to do so, subject to the following conditions:
  13
  14 The above copyright notice and this permission notice (including the next
  15 paragraph) shall be included in all copies or substantial portions of the
  16 Software.
  17
  18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20 FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21 ERIC ANHOLT OR SILICON INTEGRATED SYSTEMS CORP BE LIABLE FOR ANY CLAIM,
  22 DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23 OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24 USE OR OTHER DEALINGS IN THE SOFTWARE.
  25
  26 **************************************************************************/
  27 /* $XFree86: xc/lib/GL/mesa/src/drv/sis/sis_ctx.c,v 1.3 2000/09/26 15:56:48 tsi Exp $ */
  28
  29 /*
  30  * Authors:
  31  *    Sung-Ching Lin <sclin@sis.com.tw>
  32  *    Eric Anholt <anholt@FreeBSD.org>
  33  *
  34  */
  35
  36 #include "sis_context.h"
  37 #include "sis_dd.h"
  38 #include "sis_lock.h"
  39 #include "sis_alloc.h"
  40 #include "sis_state.h"
  41
  42 #include "swrast/swrast.h"
  43
  44 #include "utils.h"
  45
  46 #define DRIVER_DATE     "20030810"
  47
  48 /* Return the width and height of the given buffer.
  49  */
  50 static void
  51 sisDDGetBufferSize( GLframebuffer *buffer,
  52                               GLuint *width, GLuint *height )
  53 {
  54    GET_CURRENT_CONTEXT(ctx);
  55    sisContextPtr smesa = SIS_CONTEXT(ctx);
  56
  57    LOCK_HARDWARE();
  58    *width  = smesa->driDrawable->w;
  59    *height = smesa->driDrawable->h;
  60    UNLOCK_HARDWARE();
  61 }
  62
  63 /* Return various strings for glGetString().
  64  */
  65 static const GLubyte *
  66 sisDDGetString( GLcontext *ctx, GLenum name )
  67 {
  68    sisContextPtr smesa = SIS_CONTEXT(ctx);
  69    static char buffer[128];
  70    unsigned   offset;
  71    GLuint agp_mode = (smesa->AGPSize > 0);
  72
  73    switch ( name )
  74    {
  75    case GL_VENDOR:
  76       return (GLubyte *)"Eric Anholt";
  77
  78    case GL_RENDERER:
  79       offset = driGetRendererString( buffer, "SiS", DRIVER_DATE, agp_mode );
  80
  81       return (GLubyte *)buffer;
  82
  83    default:
  84       return NULL;
  85    }
  86 }
  87
  88 /* Send all commands to the hardware.  No-op, due to mmio.
  89  */
  90 static void
  91 sisDDFlush( GLcontext *ctx )
  92 {
  93    /* Do nothing */
  94 }
  95
  96 /* Make sure all commands have been sent to the hardware and have
  97  * completed processing.
  98  */
  99 static void
 100 sisDDFinish( GLcontext *ctx )
 101 {
 102    sisContextPtr smesa = SIS_CONTEXT(ctx);
 103
 104    sisDDFlush( ctx );
 105    WaitEngIdle( smesa );
 106 }
 107
 108 void
 109 sisUpdateBufferSize( sisContextPtr smesa )
 110 {
 111    __GLSiSHardware *current = &smesa->current;
 112    __GLSiSHardware *prev = &smesa->prev;
 113    GLuint z_depth;
 114
 115    /* XXX Should get the base offset of the frontbuffer from the X Server */
 116    smesa->frontOffset = smesa->driDrawable->x * smesa->bytesPerPixel +
 117                         smesa->driDrawable->y * smesa->frontPitch;
 118
 119    if ( smesa->width == smesa->driDrawable->w &&
 120       smesa->height == smesa->driDrawable->h )
 121    {
 122       return;
 123    }
 124
 125    smesa->width = smesa->driDrawable->w;
 126    smesa->height = smesa->driDrawable->h;
 127    smesa->bottom = smesa->height - 1;
 128
 129    if ( smesa->backbuffer )
 130       sisFreeBackbuffer( smesa );
 131    if ( smesa->depthbuffer )
 132       sisFreeZStencilBuffer( smesa );
 133
 134    if ( smesa->glCtx->Visual.depthBits > 0 )
 135       sisAllocZStencilBuffer( smesa );
 136    if ( smesa->glCtx->Visual.doubleBufferMode )
 137       sisAllocBackbuffer( smesa );
 138
 139    switch (smesa->zFormat)
 140    {
 141    case SiS_ZFORMAT_Z16:
 142       z_depth = 2;
 143       break;
 144    case SiS_ZFORMAT_Z32:
 145    case SiS_ZFORMAT_S8Z24:
 146       z_depth = 4;
 147       break;
 148    default:
 149       assert( 0 );
 150    }
 151
 152    current->hwZ &= ~MASK_ZBufferPitch;
 153    current->hwZ |= smesa->width * z_depth >> 2;
 154    current->hwOffsetZ = smesa->depthOffset >> 2;
 155
 156    if ((current->hwOffsetZ != prev->hwOffsetZ) || (current->hwZ != prev->hwZ)) {
 157       prev->hwOffsetZ = current->hwOffsetZ;
 158       prev->hwZ = current->hwZ;
 159       smesa->GlobalFlag |= GFLAG_ZSETTING;
 160    }
 161
 162    sisUpdateClipping( smesa->glCtx );
 163 }
 164
 165 /* Initialize the driver's misc functions.
 166  */
 167 void
 168 sisDDInitDriverFuncs( GLcontext *ctx )
 169 {
 170    ctx->Driver.GetBufferSize    = sisDDGetBufferSize;
 171    ctx->Driver.ResizeBuffers    = _swrast_alloc_buffers;
 172    ctx->Driver.GetString        = sisDDGetString;
 173    ctx->Driver.Finish           = sisDDFinish;
 174    ctx->Driver.Flush            = sisDDFlush;
 175    ctx->Driver.Error            = NULL;
 176 }