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 #include "framebuffer.h"
  45
  46 #include "utils.h"
  47
  48 #define DRIVER_DATE     "20041008"
  49
  50 /* Return the width and height of the given buffer.
  51  */
  52 static void
  53 sisGetBufferSize( GLframebuffer *buffer,
  54                               GLuint *width, GLuint *height )
  55 {
  56    GET_CURRENT_CONTEXT(ctx);
  57    sisContextPtr smesa = SIS_CONTEXT(ctx);
  58
  59    LOCK_HARDWARE();
  60    *width  = smesa->driDrawable->w;
  61    *height = smesa->driDrawable->h;
  62    UNLOCK_HARDWARE();
  63 }
  64
  65 /* Return various strings for glGetString().
  66  */
  67 static const GLubyte *
  68 sisGetString( GLcontext *ctx, GLenum name )
  69 {
  70    sisContextPtr smesa = SIS_CONTEXT(ctx);
  71    static char buffer[128];
  72    unsigned   offset;
  73    GLuint agp_mode = (smesa->AGPSize > 0);
  74
  75    switch ( name )
  76    {
  77    case GL_VENDOR:
  78       return (GLubyte *)"Eric Anholt";
  79
  80    case GL_RENDERER:
  81       offset = driGetRendererString( buffer, "SiS", DRIVER_DATE, agp_mode );
  82
  83       return (GLubyte *)buffer;
  84
  85    default:
  86       return NULL;
  87    }
  88 }
  89
  90 /* Send all commands to the hardware.
  91  */
  92 static void
  93 sisFlush( GLcontext *ctx )
  94 {
  95    sisContextPtr smesa = SIS_CONTEXT(ctx);
  96
  97    SIS_FIREVERTICES(smesa);
  98 }
  99
 100 /* Make sure all commands have been sent to the hardware and have
 101  * completed processing.
 102  */
 103 static void
 104 sisFinish( GLcontext *ctx )
 105 {
 106    sisContextPtr smesa = SIS_CONTEXT(ctx);
 107
 108    SIS_FIREVERTICES(smesa);
 109    LOCK_HARDWARE();
 110    WaitEngIdle( smesa );
 111    UNLOCK_HARDWARE();
 112 }
 113
 114 void
 115 sisUpdateBufferSize( sisContextPtr smesa )
 116 {
 117    __GLSiSHardware *current = &smesa->current;
 118    __GLSiSHardware *prev = &smesa->prev;
 119    GLuint z_depth;
 120
 121    /* XXX Should get the base offset of the frontbuffer from the X Server */
 122    smesa->frontOffset = smesa->driDrawable->x * smesa->bytesPerPixel +
 123                         smesa->driDrawable->y * smesa->frontPitch;
 124
 125    if ( smesa->width == smesa->driDrawable->w &&
 126       smesa->height == smesa->driDrawable->h )
 127    {
 128       return;
 129    }
 130
 131    smesa->width = smesa->driDrawable->w;
 132    smesa->height = smesa->driDrawable->h;
 133    smesa->bottom = smesa->height - 1;
 134
 135    if ( smesa->backbuffer )
 136       sisFreeBackbuffer( smesa );
 137    if ( smesa->depthbuffer )
 138       sisFreeZStencilBuffer( smesa );
 139
 140    if ( smesa->glCtx->Visual.depthBits > 0 )
 141       sisAllocZStencilBuffer( smesa );
 142    if ( smesa->glCtx->Visual.doubleBufferMode )
 143       sisAllocBackbuffer( smesa );
 144
 145    switch (smesa->zFormat)
 146    {
 147    case SiS_ZFORMAT_Z16:
 148       z_depth = 2;
 149       break;
 150    case SiS_ZFORMAT_Z32:
 151    case SiS_ZFORMAT_S8Z24:
 152       z_depth = 4;
 153       break;
 154    default:
 155       sis_fatal_error("Bad Z format\n");
 156    }
 157
 158    current->hwZ &= ~MASK_ZBufferPitch;
 159    current->hwZ |= smesa->width * z_depth >> 2;
 160    current->hwOffsetZ = smesa->depthOffset >> 2;
 161
 162    if ((current->hwOffsetZ != prev->hwOffsetZ) || (current->hwZ != prev->hwZ)) {
 163       prev->hwOffsetZ = current->hwOffsetZ;
 164       prev->hwZ = current->hwZ;
 165       smesa->GlobalFlag |= GFLAG_ZSETTING;
 166    }
 167
 168    sisUpdateClipping( smesa->glCtx );
 169 }
 170
 171 /* Initialize the driver's misc functions.
 172  */
 173 void
 174 sisInitDriverFuncs( struct dd_function_table *functions )
 175 {
 176    functions->GetBufferSize = sisGetBufferSize;
 177    functions->ResizeBuffers = _mesa_resize_framebuffer;
 178    functions->GetString     = sisGetString;
 179    functions->Finish        = sisFinish;
 180    functions->Flush         = sisFlush;
 181 }