static void mgaDDStencilMask(GLcontext *ctx, GLuint mask)
{
mgaContextPtr mmesa = MGA_CONTEXT(ctx);
MGA_STATECHANGE( mmesa, MGA_UPLOAD_CONTEXT );
mmesa->hw.stencil &= S_swtmsk_MASK;
mmesa->hw.stencil |= MGA_FIELD( S_swtmsk, mask );
}
static void
mgaDDStencilFuncSeparate(GLcontext *ctx, GLenum face, GLenum func, GLint ref,
GLuint mask)
{
mgaContextPtr mmesa = MGA_CONTEXT(ctx);
GLuint stencil;
GLuint stencilctl;
stencil = MGA_FIELD( S_sref, ref ) | MGA_FIELD( S_smsk, mask );
switch (func)
{
case GL_NEVER:
stencilctl = SC_smode_snever;
break;
case GL_LESS:
stencilctl = SC_smode_slt;
break;
case GL_LEQUAL:
stencilctl = SC_smode_slte;
break;
case GL_GREATER:
stencilctl = SC_smode_sgt;
break;
case GL_GEQUAL:
stencilctl = SC_smode_sgte;
break;
case GL_NOTEQUAL:
stencilctl = SC_smode_sne;
break;
case GL_EQUAL:
stencilctl = SC_smode_se;
break;
case GL_ALWAYS:
default:
stencilctl = SC_smode_salways;
break;
}
MGA_STATECHANGE( mmesa, MGA_UPLOAD_CONTEXT );
mmesa->hw.stencil &= (S_sref_MASK & S_smsk_MASK);
mmesa->hw.stencil |= stencil;
mmesa->hw.stencilctl &= SC_smode_MASK;
mmesa->hw.stencilctl |= stencilctl;
}
static void
mgaSetTexFilter( mgaTextureObjectPtr t, GLenum minf, GLenum magf )
{
GLuint val = 0;
switch (minf) {
case GL_NEAREST: val = TF_minfilter_nrst; break;
case GL_LINEAR: val = TF_minfilter_bilin; break;
case GL_NEAREST_MIPMAP_NEAREST: val = TF_minfilter_mm1s; break;
case GL_LINEAR_MIPMAP_NEAREST: val = TF_minfilter_mm4s; break;
case GL_NEAREST_MIPMAP_LINEAR: val = TF_minfilter_mm2s; break;
case GL_LINEAR_MIPMAP_LINEAR: val = TF_minfilter_mm8s; break;
default: val = TF_minfilter_nrst; break;
}
switch (magf) {
case GL_NEAREST: val |= TF_magfilter_nrst; break;
case GL_LINEAR: val |= TF_magfilter_bilin; break;
default: val |= TF_magfilter_nrst; break;
}
/* See OpenGL 1.2 specification */
if (magf == GL_LINEAR && (minf == GL_NEAREST_MIPMAP_NEAREST ||
minf == GL_NEAREST_MIPMAP_LINEAR)) {
val |= MGA_FIELD( TF_fthres, 0x20 ); /* c = 0.5 */
} else {
val |= MGA_FIELD( TF_fthres, 0x10 ); /* c = 0 */
}
/* Mask off the bits for the fields we are setting. Remember, the MGA mask
* defines have 0s for the bits in the named fields. This is the opposite
* of most of the other drivers.
*/
t->setup.texfilter &= (TF_minfilter_MASK &
TF_magfilter_MASK &
TF_fthres_MASK);
t->setup.texfilter |= val;
}
static void mgaDDAlphaFunc(GLcontext *ctx, GLenum func, GLfloat ref)
{
mgaContextPtr mmesa = MGA_CONTEXT(ctx);
GLubyte refByte;
GLuint a;
CLAMPED_FLOAT_TO_UBYTE(refByte, ref);
switch ( func ) {
case GL_NEVER:
a = AC_atmode_alt;
refByte = 0;
break;
case GL_LESS:
a = AC_atmode_alt;
break;
case GL_GEQUAL:
a = AC_atmode_agte;
break;
case GL_LEQUAL:
a = AC_atmode_alte;
break;
case GL_GREATER:
a = AC_atmode_agt;
break;
case GL_NOTEQUAL:
a = AC_atmode_ane;
break;
case GL_EQUAL:
a = AC_atmode_ae;
break;
case GL_ALWAYS:
a = AC_atmode_noacmp;
break;
default:
a = 0;
break;
}
MGA_STATECHANGE( mmesa, MGA_UPLOAD_CONTEXT );
mmesa->hw.alpha_func = a | MGA_FIELD( AC_atref, refByte );
}
void mgaInitState( mgaContextPtr mmesa )
{
mgaScreenPrivate *mgaScreen = mmesa->mgaScreen;
GLcontext *ctx = mmesa->glCtx;
if (ctx->Visual.doubleBufferMode) {
/* use back buffer by default */
mmesa->draw_buffer = MGA_BACK;
mmesa->drawOffset = mmesa->mgaScreen->backOffset;
mmesa->readOffset = mmesa->mgaScreen->backOffset;
mmesa->setup.dstorg = mgaScreen->backOffset;
} else {
/* use front buffer by default */
mmesa->draw_buffer = MGA_FRONT;
mmesa->drawOffset = mmesa->mgaScreen->frontOffset;
mmesa->readOffset = mmesa->mgaScreen->frontOffset;
mmesa->setup.dstorg = mgaScreen->frontOffset;
}
mmesa->setup.maccess = (MA_memreset_disable |
MA_fogen_disable |
MA_tlutload_disable |
MA_nodither_disable |
MA_dit555_disable);
if (driQueryOptioni (&mmesa->optionCache, "color_reduction") !=
DRI_CONF_COLOR_REDUCTION_DITHER)
mmesa->setup.maccess |= MA_nodither_enable;
switch (mmesa->mgaScreen->cpp) {
case 2:
mmesa->setup.maccess |= MA_pwidth_16;
break;
case 4:
mmesa->setup.maccess |= MA_pwidth_32;
break;
default:
fprintf( stderr, "Error: unknown cpp %d, exiting...\n",
mmesa->mgaScreen->cpp );
exit( 1 );
}
switch (mmesa->glCtx->Visual.depthBits) {
case 16:
mmesa->setup.maccess |= MA_zwidth_16;
break;
case 24:
mmesa->setup.maccess |= MA_zwidth_24;
break;
case 32:
mmesa->setup.maccess |= MA_zwidth_32;
break;
}
mmesa->hw.blend_func = AC_src_one | AC_dst_zero;
mmesa->hw.blend_func_enable = 0;
mmesa->hw.alpha_func = AC_atmode_noacmp | MGA_FIELD( AC_atref, 0x00 );
mmesa->hw.alpha_func_enable = 0;
mmesa->hw.rop = mgarop_NoBLK[ GL_COPY & 0x0f ];
mmesa->hw.zmode = DC_zmode_zlt | DC_atype_zi;
mmesa->hw.stencil = MGA_FIELD( S_sref, 0x00) | MGA_FIELD( S_smsk, 0xff ) |
MGA_FIELD( S_swtmsk, 0xff );
mmesa->hw.stencilctl = SC_smode_salways | SC_sfailop_keep
| SC_szfailop_keep | SC_szpassop_keep;
mmesa->hw.stencil_enable = 0;
mmesa->hw.cull = _CULL_DISABLE;
mmesa->hw.cull_dualtex = _CULL_DISABLE;
mmesa->hw.specen = 0;
mmesa->hw.alpha_sel = AC_alphasel_diffused;
mmesa->setup.dwgctl = (DC_opcod_trap |
DC_linear_xy |
DC_solid_disable |
DC_arzero_disable |
DC_sgnzero_disable |
DC_shftzero_enable |
MGA_FIELD( DC_bop, 0xC ) |
MGA_FIELD( DC_trans, 0x0 ) |
DC_bltmod_bmonolef |
DC_pattern_disable |
DC_transc_disable |
DC_clipdis_disable);
mmesa->setup.plnwt = ~0;
mmesa->setup.alphactrl = (AC_amode_alpha_channel |
AC_astipple_disable |
AC_aten_disable);
mmesa->setup.fogcolor = PACK_COLOR_888((GLubyte)(ctx->Fog.Color[0]*255.0F),
(GLubyte)(ctx->Fog.Color[1]*255.0F),
(GLubyte)(ctx->Fog.Color[2]*255.0F));
mmesa->setup.wflag = 0;
mmesa->setup.tdualstage0 = 0;
mmesa->setup.tdualstage1 = 0;
mmesa->setup.fcol = 0;
mmesa->dirty |= MGA_UPLOAD_CONTEXT;
mmesa->envcolor[0] = 0;
mmesa->envcolor[1] = 0;
}
