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 #include "sis_tris.h"
  42
  43 #include "swrast/swrast.h"
  44
  45 #include "utils.h"
  46
  47 #define DRIVER_DATE     "20041008"
  48
  49 /* Return the width and height of the given buffer.
  50  */
  51 static void
  52 sisGetBufferSize( GLframebuffer *buffer,
  53                               GLuint *width, GLuint *height )
  54 {
  55    GET_CURRENT_CONTEXT(ctx);
  56    sisContextPtr smesa = SIS_CONTEXT(ctx);
  57
  58    LOCK_HARDWARE();
  59    *width  = smesa->driDrawable->w;
  60    *height = smesa->driDrawable->h;
  61    UNLOCK_HARDWARE();
  62 }
  63
  64 /* Return various strings for glGetString().
  65  */
  66 static const GLubyte *
  67 sisGetString( GLcontext *ctx, GLenum name )
  68 {
  69    sisContextPtr smesa = SIS_CONTEXT(ctx);
  70    static char buffer[128];
  71    unsigned   offset;
  72    GLuint agp_mode = (smesa->AGPSize > 0);
  73
  74    switch ( name )
  75    {
  76    case GL_VENDOR:
  77       return (GLubyte *)"Eric Anholt";
  78
  79    case GL_RENDERER:
  80       offset = driGetRendererString( buffer, "SiS", DRIVER_DATE, agp_mode );
  81
  82       return (GLubyte *)buffer;
  83
  84    default:
  85       return NULL;
  86    }
  87 }
  88
  89 /* Send all commands to the hardware.
  90  */
  91 static void
  92 sisFlush( GLcontext *ctx )
  93 {
  94    sisContextPtr smesa = SIS_CONTEXT(ctx);
  95
  96    SIS_FIREVERTICES(smesa);
  97 }
  98
  99 /* Make sure all commands have been sent to the hardware and have
 100  * completed processing.
 101  */
 102 static void
 103 sisFinish( GLcontext *ctx )
 104 {
 105    sisContextPtr smesa = SIS_CONTEXT(ctx);
 106
 107    SIS_FIREVERTICES(smesa);
 108    LOCK_HARDWARE();
 109    WaitEngIdle( smesa );
 110    UNLOCK_HARDWARE();
 111 }
 112
 113 void
 114 sisUpdateBufferSize( sisContextPtr smesa )
 115 {
 116    __GLSiSHardware *current = &smesa->current;
 117    __GLSiSHardware *prev = &smesa->prev;
 118    GLuint z_depth;
 119
 120    /* XXX Should get the base offset of the frontbuffer from the X Server */
 121    smesa->frontOffset = smesa->driDrawable->x * smesa->bytesPerPixel +
 122                         smesa->driDrawable->y * smesa->frontPitch;
 123
 124    if ( smesa->width == smesa->driDrawable->w &&
 125       smesa->height == smesa->driDrawable->h )
 126    {
 127       return;
 128    }
 129
 130    smesa->width = smesa->driDrawable->w;
 131    smesa->height = smesa->driDrawable->h;
 132    smesa->bottom = smesa->height - 1;
 133
 134    if ( smesa->backbuffer )
 135       sisFreeBackbuffer( smesa );
 136    if ( smesa->depthbuffer )
 137       sisFreeZStencilBuffer( smesa );
 138
 139    if ( smesa->glCtx->Visual.depthBits > 0 )
 140       sisAllocZStencilBuffer( smesa );
 141    if ( smesa->glCtx->Visual.doubleBufferMode )
 142       sisAllocBackbuffer( smesa );
 143
 144    switch (smesa->zFormat)
 145    {
 146    case SiS_ZFORMAT_Z16:
 147       z_depth = 2;
 148       break;
 149    case SiS_ZFORMAT_Z32:
 150    case SiS_ZFORMAT_S8Z24:
 151       z_depth = 4;
 152       break;
 153    default:
 154       sis_fatal_error("Bad Z format\n");
 155    }
 156
 157    current->hwZ &= ~MASK_ZBufferPitch;
 158    current->hwZ |= smesa->width * z_depth >> 2;
 159    current->hwOffsetZ = smesa->depthOffset >> 2;
 160
 161    if ((current->hwOffsetZ != prev->hwOffsetZ) || (current->hwZ != prev->hwZ)) {
 162       prev->hwOffsetZ = current->hwOffsetZ;
 163       prev->hwZ = current->hwZ;
 164       smesa->GlobalFlag |= GFLAG_ZSETTING;
 165    }
 166
 167    sisUpdateClipping( smesa->glCtx );
 168 }
 169
 170 /* Initialize the driver's misc functions.
 171  */
 172 void
 173 sisInitDriverFuncs( struct dd_function_table *functions )
 174 {
 175    functions->GetBufferSize     = sisGetBufferSize;
 176    functions->ResizeBuffers    = _swrast_alloc_buffers;
 177    functions->GetString = sisGetString;
 178    functions->Finish            = sisFinish;
 179    functions->Flush             = sisFlush;
 180 }