#include "glheader.h"
#include "imports.h"
#include "context.h"
#include "macros.h"
#include "stencil.h"
#include "mtypes.h"
void GLAPIENTRY
_mesa_ClearStencil( GLint s )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (ctx->Stencil.Clear == (GLuint) s)
return;
FLUSH_VERTICES(ctx, _NEW_STENCIL);
ctx->Stencil.Clear = (GLuint) s;
if (ctx->Driver.ClearStencil) {
ctx->Driver.ClearStencil( ctx, s );
}
}
void GLAPIENTRY
_mesa_StencilFunc( GLenum func, GLint ref, GLuint mask )
{
GET_CURRENT_CONTEXT(ctx);
const GLint stencilMax = (1 << ctx->DrawBuffer->Visual.stencilBits) - 1;
ASSERT_OUTSIDE_BEGIN_END(ctx);
switch (func) {
case GL_NEVER:
case GL_LESS:
case GL_LEQUAL:
case GL_GREATER:
case GL_GEQUAL:
case GL_EQUAL:
case GL_NOTEQUAL:
case GL_ALWAYS:
break;
default:
_mesa_error( ctx, GL_INVALID_ENUM, "glStencilFunc (0x%04x)", func );
return;
}
ref = CLAMP( ref, 0, stencilMax );
if (ctx->Extensions.EXT_stencil_two_side) {
const GLint face = ctx->Stencil.ActiveFace;
if (ctx->Stencil.Function[face] == func &&
ctx->Stencil.ValueMask[face] == mask &&
ctx->Stencil.Ref[face] == ref)
return;
FLUSH_VERTICES(ctx, _NEW_STENCIL);
ctx->Stencil.Function[face] = func;
ctx->Stencil.Ref[face] = ref;
ctx->Stencil.ValueMask[face] = mask;
if (ctx->Driver.StencilFuncSeparate) {
ctx->Driver.StencilFuncSeparate(ctx, face ? GL_BACK : GL_FRONT,
func, ref, mask);
}
}
else {
if (ctx->Stencil.Function[0] == func &&
ctx->Stencil.Function[1] == func &&
ctx->Stencil.ValueMask[0] == mask &&
ctx->Stencil.ValueMask[1] == mask &&
ctx->Stencil.Ref[0] == ref &&
ctx->Stencil.Ref[1] == ref)
return;
FLUSH_VERTICES(ctx, _NEW_STENCIL);
ctx->Stencil.Function[0] = ctx->Stencil.Function[1] = func;
ctx->Stencil.Ref[0] = ctx->Stencil.Ref[1] = ref;
ctx->Stencil.ValueMask[0] = ctx->Stencil.ValueMask[1] = mask;
if (ctx->Driver.StencilFuncSeparate) {
ctx->Driver.StencilFuncSeparate(ctx, GL_FRONT_AND_BACK,
func, ref, mask);
}
}
}
void GLAPIENTRY
_mesa_StencilMask( GLuint mask )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (ctx->Extensions.EXT_stencil_two_side) {
const GLint face = ctx->Stencil.ActiveFace;
if (ctx->Stencil.WriteMask[face] == mask)
return;
FLUSH_VERTICES(ctx, _NEW_STENCIL);
ctx->Stencil.WriteMask[face] = mask;
if (ctx->Driver.StencilMaskSeparate) {
ctx->Driver.StencilMaskSeparate(ctx, face ? GL_BACK : GL_FRONT, mask);
}
}
else {
if (ctx->Stencil.WriteMask[0] == mask &&
ctx->Stencil.WriteMask[1] == mask)
return;
FLUSH_VERTICES(ctx, _NEW_STENCIL);
ctx->Stencil.WriteMask[0] = ctx->Stencil.WriteMask[1] = mask;
if (ctx->Driver.StencilMaskSeparate) {
ctx->Driver.StencilMaskSeparate(ctx, GL_FRONT_AND_BACK, mask);
}
}
}
void GLAPIENTRY
_mesa_StencilOp(GLenum fail, GLenum zfail, GLenum zpass)
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
switch (fail) {
case GL_KEEP:
case GL_ZERO:
case GL_REPLACE:
case GL_INCR:
case GL_DECR:
case GL_INVERT:
break;
case GL_INCR_WRAP_EXT:
case GL_DECR_WRAP_EXT:
if (ctx->Extensions.EXT_stencil_wrap) {
break;
}
default:
_mesa_error(ctx, GL_INVALID_ENUM, "glStencilOp");
return;
}
switch (zfail) {
case GL_KEEP:
case GL_ZERO:
case GL_REPLACE:
case GL_INCR:
case GL_DECR:
case GL_INVERT:
break;
case GL_INCR_WRAP_EXT:
case GL_DECR_WRAP_EXT:
if (ctx->Extensions.EXT_stencil_wrap) {
break;
}
default:
_mesa_error(ctx, GL_INVALID_ENUM, "glStencilOp");
return;
}
switch (zpass) {
case GL_KEEP:
case GL_ZERO:
case GL_REPLACE:
case GL_INCR:
case GL_DECR:
case GL_INVERT:
break;
case GL_INCR_WRAP_EXT:
case GL_DECR_WRAP_EXT:
if (ctx->Extensions.EXT_stencil_wrap) {
break;
}
default:
_mesa_error(ctx, GL_INVALID_ENUM, "glStencilOp");
return;
}
if (ctx->Extensions.EXT_stencil_two_side) {
const GLint face = ctx->Stencil.ActiveFace;
if (ctx->Stencil.ZFailFunc[face] == zfail &&
ctx->Stencil.ZPassFunc[face] == zpass &&
ctx->Stencil.FailFunc[face] == fail)
return;
FLUSH_VERTICES(ctx, _NEW_STENCIL);
ctx->Stencil.ZFailFunc[face] = zfail;
ctx->Stencil.ZPassFunc[face] = zpass;
ctx->Stencil.FailFunc[face] = fail;
if (ctx->Driver.StencilOpSeparate) {
ctx->Driver.StencilOpSeparate(ctx, face ? GL_BACK : GL_FRONT,
fail, zfail, zpass);
}
}
else {
if (ctx->Stencil.ZFailFunc[0] == zfail &&
ctx->Stencil.ZFailFunc[1] == zfail &&
ctx->Stencil.ZPassFunc[0] == zpass &&
ctx->Stencil.ZPassFunc[1] == zpass &&
ctx->Stencil.FailFunc[0] == fail &&
ctx->Stencil.FailFunc[1] == fail)
return;
FLUSH_VERTICES(ctx, _NEW_STENCIL);
ctx->Stencil.ZFailFunc[0] = ctx->Stencil.ZFailFunc[1] = zfail;
ctx->Stencil.ZPassFunc[0] = ctx->Stencil.ZPassFunc[1] = zpass;
ctx->Stencil.FailFunc[0] = ctx->Stencil.FailFunc[1] = fail;
if (ctx->Driver.StencilOpSeparate) {
ctx->Driver.StencilOpSeparate(ctx, GL_FRONT_AND_BACK,
fail, zfail, zpass);
}
}
}
#if _HAVE_FULL_GL
void GLAPIENTRY
_mesa_ActiveStencilFaceEXT(GLenum face)
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (!ctx->Extensions.EXT_stencil_two_side) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glActiveStencilFaceEXT");
return;
}
if (face == GL_FRONT || face == GL_BACK) {
FLUSH_VERTICES(ctx, _NEW_STENCIL);
ctx->Stencil.ActiveFace = (face == GL_FRONT) ? 0 : 1;
}
else {
_mesa_error(ctx, GL_INVALID_ENUM, "glActiveStencilFaceEXT(face)");
}
}
#endif
void GLAPIENTRY
_mesa_StencilOpSeparate(GLenum face, GLenum fail, GLenum zfail, GLenum zpass)
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (face != GL_FRONT && face != GL_BACK && face != GL_FRONT_AND_BACK) {
_mesa_error(ctx, GL_INVALID_ENUM, "glStencilOpSeparate(face)");
return;
}
switch (fail) {
case GL_KEEP:
case GL_ZERO:
case GL_REPLACE:
case GL_INCR:
case GL_DECR:
case GL_INVERT:
break;
case GL_INCR_WRAP_EXT:
case GL_DECR_WRAP_EXT:
if (ctx->Extensions.EXT_stencil_wrap) {
break;
}
default:
_mesa_error(ctx, GL_INVALID_ENUM, "glStencilOpSeparate(fail)");
return;
}
switch (zfail) {
case GL_KEEP:
case GL_ZERO:
case GL_REPLACE:
case GL_INCR:
case GL_DECR:
case GL_INVERT:
break;
case GL_INCR_WRAP_EXT:
case GL_DECR_WRAP_EXT:
if (ctx->Extensions.EXT_stencil_wrap) {
break;
}
default:
_mesa_error(ctx, GL_INVALID_ENUM, "glStencilOpSeparate(zfail)");
return;
}
switch (zpass) {
case GL_KEEP:
case GL_ZERO:
case GL_REPLACE:
case GL_INCR:
case GL_DECR:
case GL_INVERT:
break;
case GL_INCR_WRAP_EXT:
case GL_DECR_WRAP_EXT:
if (ctx->Extensions.EXT_stencil_wrap) {
break;
}
default:
_mesa_error(ctx, GL_INVALID_ENUM, "glStencilOpSeparate(zpass)");
return;
}
FLUSH_VERTICES(ctx, _NEW_STENCIL);
if (face != GL_BACK) {
ctx->Stencil.FailFunc[0] = fail;
ctx->Stencil.ZFailFunc[0] = zfail;
ctx->Stencil.ZPassFunc[0] = zpass;
}
if (face != GL_FRONT) {
ctx->Stencil.FailFunc[1] = fail;
ctx->Stencil.ZFailFunc[1] = zfail;
ctx->Stencil.ZPassFunc[1] = zpass;
}
if (ctx->Driver.StencilOpSeparate) {
ctx->Driver.StencilOpSeparate(ctx, face, fail, zfail, zpass);
}
}
void GLAPIENTRY
_mesa_StencilFuncSeparate(GLenum face, GLenum func, GLint ref, GLuint mask)
{
GET_CURRENT_CONTEXT(ctx);
const GLint stencilMax = (1 << ctx->DrawBuffer->Visual.stencilBits) - 1;
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (face != GL_FRONT && face != GL_BACK && face != GL_FRONT_AND_BACK) {
_mesa_error(ctx, GL_INVALID_ENUM, "glStencilFuncSeparate(face)");
return;
}
switch (func) {
case GL_NEVER:
case GL_LESS:
case GL_LEQUAL:
case GL_GREATER:
case GL_GEQUAL:
case GL_EQUAL:
case GL_NOTEQUAL:
case GL_ALWAYS:
break;
default:
_mesa_error(ctx, GL_INVALID_ENUM, "glStencilFuncSeparate(func)");
return;
}
ref = CLAMP(ref, 0, stencilMax);
FLUSH_VERTICES(ctx, _NEW_STENCIL);
if (face == GL_FRONT || face == GL_FRONT_AND_BACK) {
ctx->Stencil.Function[0] = func;
ctx->Stencil.Ref[0] = ref;
ctx->Stencil.ValueMask[0] = mask;
}
if (face == GL_BACK || face == GL_FRONT_AND_BACK) {
ctx->Stencil.Function[1] = func;
ctx->Stencil.Ref[1] = ref;
ctx->Stencil.ValueMask[1] = mask;
}
if (ctx->Driver.StencilFuncSeparate) {
ctx->Driver.StencilFuncSeparate(ctx, face, func, ref, mask);
}
}
void GLAPIENTRY
_mesa_StencilMaskSeparate(GLenum face, GLuint mask)
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (face != GL_FRONT && face != GL_BACK && face != GL_FRONT_AND_BACK) {
_mesa_error(ctx, GL_INVALID_ENUM, "glStencilaMaskSeparate(face)");
return;
}
FLUSH_VERTICES(ctx, _NEW_STENCIL);
if (face != GL_BACK) {
ctx->Stencil.WriteMask[0] = mask;
}
if (face != GL_FRONT) {
ctx->Stencil.WriteMask[1] = mask;
}
if (ctx->Driver.StencilMaskSeparate) {
ctx->Driver.StencilMaskSeparate(ctx, face, mask);
}
}
void
_mesa_update_stencil(GLcontext *ctx)
{
if (ctx->Extensions.EXT_stencil_two_side) {
ctx->Stencil._TestTwoSide = ctx->Stencil.TestTwoSide;
}
else {
ctx->Stencil._TestTwoSide =
(ctx->Stencil.Function[0] != ctx->Stencil.Function[1] ||
ctx->Stencil.FailFunc[0] != ctx->Stencil.FailFunc[1] ||
ctx->Stencil.ZPassFunc[0] != ctx->Stencil.ZPassFunc[1] ||
ctx->Stencil.ZFailFunc[0] != ctx->Stencil.ZFailFunc[1] ||
ctx->Stencil.Ref[0] != ctx->Stencil.Ref[1] ||
ctx->Stencil.ValueMask[0] != ctx->Stencil.ValueMask[1] ||
ctx->Stencil.WriteMask[0] != ctx->Stencil.WriteMask[1]);
}
}
void
_mesa_init_stencil(GLcontext *ctx)
{
ctx->Stencil.Enabled = GL_FALSE;
ctx->Stencil.TestTwoSide = GL_FALSE;
ctx->Stencil.ActiveFace = 0;
ctx->Stencil.Function[0] = GL_ALWAYS;
ctx->Stencil.Function[1] = GL_ALWAYS;
ctx->Stencil.FailFunc[0] = GL_KEEP;
ctx->Stencil.FailFunc[1] = GL_KEEP;
ctx->Stencil.ZPassFunc[0] = GL_KEEP;
ctx->Stencil.ZPassFunc[1] = GL_KEEP;
ctx->Stencil.ZFailFunc[0] = GL_KEEP;
ctx->Stencil.ZFailFunc[1] = GL_KEEP;
ctx->Stencil.Ref[0] = 0;
ctx->Stencil.Ref[1] = 0;
ctx->Stencil.ValueMask[0] = ~0U;
ctx->Stencil.ValueMask[1] = ~0U;
ctx->Stencil.WriteMask[0] = ~0U;
ctx->Stencil.WriteMask[1] = ~0U;
ctx->Stencil.Clear = 0;
}