/*
* Mesa 3-D graphics library
- * Version: 7.1
*
* Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
*/
#include "glheader.h"
-#include "imports.h"
+
#include "context.h"
#include "macros.h"
#include "stencil.h"
static GLboolean
-validate_stencil_op(GLcontext *ctx, GLenum op)
+validate_stencil_op(struct gl_context *ctx, GLenum op)
{
switch (op) {
case GL_KEEP:
case GL_INCR:
case GL_DECR:
case GL_INVERT:
+ case GL_INCR_WRAP:
+ case GL_DECR_WRAP:
return GL_TRUE;
- case GL_INCR_WRAP_EXT:
- case GL_DECR_WRAP_EXT:
- if (ctx->Extensions.EXT_stencil_wrap) {
- return GL_TRUE;
- }
- /* FALL-THROUGH */
default:
return GL_FALSE;
}
static GLboolean
-validate_stencil_func(GLcontext *ctx, GLenum func)
+validate_stencil_func(struct gl_context *ctx, GLenum func)
{
switch (func) {
case GL_NEVER:
_mesa_ClearStencil( GLint s )
{
GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END(ctx);
- if (ctx->Stencil.Clear == (GLuint) s)
- return;
+ if (MESA_VERBOSE & VERBOSE_API)
+ _mesa_debug(ctx, "glClearStencil(%d)\n", s);
- FLUSH_VERTICES(ctx, _NEW_STENCIL);
ctx->Stencil.Clear = (GLuint) s;
-
- if (ctx->Driver.ClearStencil) {
- ctx->Driver.ClearStencil( ctx, s );
- }
}
* \sa glStencilFunc().
*
* Verifies the parameters and updates the respective values in
- * __GLcontextRec::Stencil. On change flushes the vertices and notifies the
- * driver via the dd_function_table::StencilFunc callback.
+ * __struct gl_contextRec::Stencil. On change flushes the vertices and notifies
+ * the driver via the dd_function_table::StencilFunc callback.
*/
void GLAPIENTRY
_mesa_StencilFuncSeparateATI( GLenum frontfunc, GLenum backfunc, GLint ref, GLuint mask )
{
GET_CURRENT_CONTEXT(ctx);
- const GLint stencilMax = (1 << ctx->DrawBuffer->Visual.stencilBits) - 1;
- ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ if (MESA_VERBOSE & VERBOSE_API)
+ _mesa_debug(ctx, "glStencilFuncSeparateATI()\n");
if (!validate_stencil_func(ctx, frontfunc)) {
_mesa_error(ctx, GL_INVALID_ENUM,
return;
}
- ref = CLAMP( ref, 0, stencilMax );
-
/* set both front and back state */
if (ctx->Stencil.Function[0] == frontfunc &&
ctx->Stencil.Function[1] == backfunc &&
ctx->Stencil.Ref[0] == ref &&
ctx->Stencil.Ref[1] == ref)
return;
- FLUSH_VERTICES(ctx, _NEW_STENCIL);
+ FLUSH_VERTICES(ctx, ctx->DriverFlags.NewStencil ? 0 : _NEW_STENCIL);
+ ctx->NewDriverState |= ctx->DriverFlags.NewStencil;
ctx->Stencil.Function[0] = frontfunc;
ctx->Stencil.Function[1] = backfunc;
ctx->Stencil.Ref[0] = ctx->Stencil.Ref[1] = ref;
* \sa glStencilFunc().
*
* Verifies the parameters and updates the respective values in
- * __GLcontextRec::Stencil. On change flushes the vertices and notifies the
- * driver via the dd_function_table::StencilFunc callback.
+ * __struct gl_contextRec::Stencil. On change flushes the vertices and notifies
+ * the driver via the dd_function_table::StencilFunc callback.
*/
-void GLAPIENTRY
-_mesa_StencilFunc( GLenum func, GLint ref, GLuint mask )
+static void
+stencil_func(struct gl_context *ctx, GLenum func, GLint ref, GLuint mask)
{
- GET_CURRENT_CONTEXT(ctx);
- const GLint stencilMax = (1 << ctx->DrawBuffer->Visual.stencilBits) - 1;
const GLint face = ctx->Stencil.ActiveFace;
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- if (!validate_stencil_func(ctx, func)) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glStencilFunc(func)");
- return;
- }
-
- ref = CLAMP( ref, 0, stencilMax );
if (face != 0) {
if (ctx->Stencil.Function[face] == func &&
ctx->Stencil.ValueMask[face] == mask &&
ctx->Stencil.Ref[face] == ref)
return;
- FLUSH_VERTICES(ctx, _NEW_STENCIL);
+ FLUSH_VERTICES(ctx, ctx->DriverFlags.NewStencil ? 0 : _NEW_STENCIL);
+ ctx->NewDriverState |= ctx->DriverFlags.NewStencil;
ctx->Stencil.Function[face] = func;
ctx->Stencil.Ref[face] = ref;
ctx->Stencil.ValueMask[face] = mask;
ctx->Stencil.Ref[0] == ref &&
ctx->Stencil.Ref[1] == ref)
return;
- FLUSH_VERTICES(ctx, _NEW_STENCIL);
+ FLUSH_VERTICES(ctx, ctx->DriverFlags.NewStencil ? 0 : _NEW_STENCIL);
+ ctx->NewDriverState |= ctx->DriverFlags.NewStencil;
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;
}
+void GLAPIENTRY
+_mesa_StencilFunc_no_error(GLenum func, GLint ref, GLuint mask)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ stencil_func(ctx, func, ref, mask);
+}
+
+
+void GLAPIENTRY
+_mesa_StencilFunc(GLenum func, GLint ref, GLuint mask)
+{
+ GET_CURRENT_CONTEXT(ctx);
+
+ if (MESA_VERBOSE & VERBOSE_API)
+ _mesa_debug(ctx, "glStencilFunc()\n");
+
+ if (!validate_stencil_func(ctx, func)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glStencilFunc(func)");
+ return;
+ }
+
+ stencil_func(ctx, func, ref, mask);
+}
+
+
/**
* Set the stencil writing mask.
*
GET_CURRENT_CONTEXT(ctx);
const GLint face = ctx->Stencil.ActiveFace;
- ASSERT_OUTSIDE_BEGIN_END(ctx);
+ if (MESA_VERBOSE & VERBOSE_API)
+ _mesa_debug(ctx, "glStencilMask()\n");
if (face != 0) {
/* Only modify the EXT_stencil_two_side back-face state.
*/
if (ctx->Stencil.WriteMask[face] == mask)
return;
- FLUSH_VERTICES(ctx, _NEW_STENCIL);
+ FLUSH_VERTICES(ctx, ctx->DriverFlags.NewStencil ? 0 : _NEW_STENCIL);
+ ctx->NewDriverState |= ctx->DriverFlags.NewStencil;
ctx->Stencil.WriteMask[face] = mask;
/* Only propagate the change to the driver if EXT_stencil_two_side
if (ctx->Stencil.WriteMask[0] == mask &&
ctx->Stencil.WriteMask[1] == mask)
return;
- FLUSH_VERTICES(ctx, _NEW_STENCIL);
+ FLUSH_VERTICES(ctx, ctx->DriverFlags.NewStencil ? 0 : _NEW_STENCIL);
+ ctx->NewDriverState |= ctx->DriverFlags.NewStencil;
ctx->Stencil.WriteMask[0] = ctx->Stencil.WriteMask[1] = mask;
if (ctx->Driver.StencilMaskSeparate) {
ctx->Driver.StencilMaskSeparate(ctx,
* \param zfail action to take when stencil test passes, but depth test fails.
* \param zpass action to take when stencil test passes and the depth test
* passes (or depth testing is not enabled).
- *
+ *
* \sa glStencilOp().
- *
+ *
* Verifies the parameters and updates the respective fields in
- * __GLcontextRec::Stencil. On change flushes the vertices and notifies the
- * driver via the dd_function_table::StencilOp callback.
+ * __struct gl_contextRec::Stencil. On change flushes the vertices and notifies
+ * the driver via the dd_function_table::StencilOp callback.
*/
-void GLAPIENTRY
-_mesa_StencilOp(GLenum fail, GLenum zfail, GLenum zpass)
+static void
+stencil_op(struct gl_context *ctx, GLenum fail, GLenum zfail, GLenum zpass)
{
- GET_CURRENT_CONTEXT(ctx);
const GLint face = ctx->Stencil.ActiveFace;
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- if (!validate_stencil_op(ctx, fail)) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glStencilOp(sfail)");
- return;
- }
- if (!validate_stencil_op(ctx, zfail)) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glStencilOp(zfail)");
- return;
- }
- if (!validate_stencil_op(ctx, zpass)) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glStencilOp(zpass)");
- return;
- }
-
if (face != 0) {
/* only set active face state */
if (ctx->Stencil.ZFailFunc[face] == zfail &&
ctx->Stencil.ZPassFunc[face] == zpass &&
ctx->Stencil.FailFunc[face] == fail)
return;
- FLUSH_VERTICES(ctx, _NEW_STENCIL);
+ FLUSH_VERTICES(ctx, ctx->DriverFlags.NewStencil ? 0 : _NEW_STENCIL);
+ ctx->NewDriverState |= ctx->DriverFlags.NewStencil;
ctx->Stencil.ZFailFunc[face] = zfail;
ctx->Stencil.ZPassFunc[face] = zpass;
ctx->Stencil.FailFunc[face] = fail;
ctx->Stencil.FailFunc[0] == fail &&
ctx->Stencil.FailFunc[1] == fail)
return;
- FLUSH_VERTICES(ctx, _NEW_STENCIL);
+ FLUSH_VERTICES(ctx, ctx->DriverFlags.NewStencil ? 0 : _NEW_STENCIL);
+ ctx->NewDriverState |= ctx->DriverFlags.NewStencil;
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;
}
+void GLAPIENTRY
+_mesa_StencilOp_no_error(GLenum fail, GLenum zfail, GLenum zpass)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ stencil_op(ctx, fail, zfail, zpass);
+}
+
+
+void GLAPIENTRY
+_mesa_StencilOp(GLenum fail, GLenum zfail, GLenum zpass)
+{
+ GET_CURRENT_CONTEXT(ctx);
+
+ if (MESA_VERBOSE & VERBOSE_API)
+ _mesa_debug(ctx, "glStencilOp()\n");
+
+ if (!validate_stencil_op(ctx, fail)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glStencilOp(sfail)");
+ return;
+ }
+
+ if (!validate_stencil_op(ctx, zfail)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glStencilOp(zfail)");
+ return;
+ }
+
+ if (!validate_stencil_op(ctx, zpass)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glStencilOp(zpass)");
+ return;
+ }
+
+ stencil_op(ctx, fail, zfail, zpass);
+}
+
-#if _HAVE_FULL_GL
/* GL_EXT_stencil_two_side */
void GLAPIENTRY
_mesa_ActiveStencilFaceEXT(GLenum face)
{
GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ if (MESA_VERBOSE & VERBOSE_API)
+ _mesa_debug(ctx, "glActiveStencilFaceEXT()\n");
if (!ctx->Extensions.EXT_stencil_two_side) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glActiveStencilFaceEXT");
}
if (face == GL_FRONT || face == GL_BACK) {
- FLUSH_VERTICES(ctx, _NEW_STENCIL);
ctx->Stencil.ActiveFace = (face == GL_FRONT) ? 0 : 2;
}
else {
_mesa_error(ctx, GL_INVALID_ENUM, "glActiveStencilFaceEXT(face)");
}
}
-#endif
-
-/**
- * OpenGL 2.0 function.
- * \todo Make StencilOp() call this function. And eventually remove the
- * ctx->Driver.StencilOp function and use ctx->Driver.StencilOpSeparate
- * instead.
- */
-void GLAPIENTRY
-_mesa_StencilOpSeparate(GLenum face, GLenum sfail, GLenum zfail, GLenum zpass)
+static void
+stencil_op_separate(struct gl_context *ctx, GLenum face, GLenum sfail,
+ GLenum zfail, GLenum zpass)
{
GLboolean set = GL_FALSE;
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- if (!validate_stencil_op(ctx, sfail)) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glStencilOpSeparate(sfail)");
- return;
- }
- if (!validate_stencil_op(ctx, zfail)) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glStencilOpSeparate(zfail)");
- return;
- }
- if (!validate_stencil_op(ctx, zpass)) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glStencilOpSeparate(zpass)");
- return;
- }
- if (face != GL_FRONT && face != GL_BACK && face != GL_FRONT_AND_BACK) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glStencilOpSeparate(face)");
- return;
- }
if (face != GL_BACK) {
/* set front */
if (ctx->Stencil.ZFailFunc[0] != zfail ||
ctx->Stencil.ZPassFunc[0] != zpass ||
ctx->Stencil.FailFunc[0] != sfail){
- FLUSH_VERTICES(ctx, _NEW_STENCIL);
+ FLUSH_VERTICES(ctx, ctx->DriverFlags.NewStencil ? 0 : _NEW_STENCIL);
+ ctx->NewDriverState |= ctx->DriverFlags.NewStencil;
ctx->Stencil.ZFailFunc[0] = zfail;
ctx->Stencil.ZPassFunc[0] = zpass;
ctx->Stencil.FailFunc[0] = sfail;
set = GL_TRUE;
}
}
+
if (face != GL_FRONT) {
/* set back */
if (ctx->Stencil.ZFailFunc[1] != zfail ||
ctx->Stencil.ZPassFunc[1] != zpass ||
ctx->Stencil.FailFunc[1] != sfail) {
- FLUSH_VERTICES(ctx, _NEW_STENCIL);
+ FLUSH_VERTICES(ctx, ctx->DriverFlags.NewStencil ? 0 : _NEW_STENCIL);
+ ctx->NewDriverState |= ctx->DriverFlags.NewStencil;
ctx->Stencil.ZFailFunc[1] = zfail;
ctx->Stencil.ZPassFunc[1] = zpass;
ctx->Stencil.FailFunc[1] = sfail;
set = GL_TRUE;
}
}
+
if (set && ctx->Driver.StencilOpSeparate) {
ctx->Driver.StencilOpSeparate(ctx, face, sfail, zfail, zpass);
}
}
-/* OpenGL 2.0 */
void GLAPIENTRY
-_mesa_StencilFuncSeparate(GLenum face, GLenum func, GLint ref, GLuint mask)
+_mesa_StencilOpSeparate_no_error(GLenum face, GLenum sfail, GLenum zfail,
+ GLenum zpass)
{
GET_CURRENT_CONTEXT(ctx);
- const GLint stencilMax = (1 << ctx->DrawBuffer->Visual.stencilBits) - 1;
- ASSERT_OUTSIDE_BEGIN_END(ctx);
+ stencil_op_separate(ctx, face, sfail, zfail, zpass);
+}
- if (face != GL_FRONT && face != GL_BACK && face != GL_FRONT_AND_BACK) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glStencilFuncSeparate(face)");
+
+void GLAPIENTRY
+_mesa_StencilOpSeparate(GLenum face, GLenum sfail, GLenum zfail, GLenum zpass)
+{
+ GET_CURRENT_CONTEXT(ctx);
+
+ if (MESA_VERBOSE & VERBOSE_API)
+ _mesa_debug(ctx, "glStencilOpSeparate()\n");
+
+ if (!validate_stencil_op(ctx, sfail)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glStencilOpSeparate(sfail)");
return;
}
- if (!validate_stencil_func(ctx, func)) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glStencilFuncSeparate(func)");
+
+ if (!validate_stencil_op(ctx, zfail)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glStencilOpSeparate(zfail)");
return;
}
- ref = CLAMP(ref, 0, stencilMax);
+ if (!validate_stencil_op(ctx, zpass)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glStencilOpSeparate(zpass)");
+ return;
+ }
- FLUSH_VERTICES(ctx, _NEW_STENCIL);
+ if (face != GL_FRONT && face != GL_BACK && face != GL_FRONT_AND_BACK) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glStencilOpSeparate(face)");
+ return;
+ }
+
+ stencil_op_separate(ctx, face, sfail, zfail, zpass);
+}
+
+
+static void
+stencil_func_separate(struct gl_context *ctx, GLenum face, GLenum func,
+ GLint ref, GLuint mask)
+{
+ FLUSH_VERTICES(ctx, ctx->DriverFlags.NewStencil ? 0 : _NEW_STENCIL);
+ ctx->NewDriverState |= ctx->DriverFlags.NewStencil;
if (face != GL_BACK) {
/* set front */
ctx->Stencil.Ref[0] = ref;
ctx->Stencil.ValueMask[0] = mask;
}
+
if (face != GL_FRONT) {
/* set 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);
}
/* OpenGL 2.0 */
void GLAPIENTRY
-_mesa_StencilMaskSeparate(GLenum face, GLuint mask)
+_mesa_StencilFuncSeparate_no_error(GLenum face, GLenum func, GLint ref,
+ GLuint mask)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ stencil_func_separate(ctx, face, func, ref, mask);
+}
+
+
+void GLAPIENTRY
+_mesa_StencilFuncSeparate(GLenum face, GLenum func, GLint ref, GLuint mask)
{
GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ if (MESA_VERBOSE & VERBOSE_API)
+ _mesa_debug(ctx, "glStencilFuncSeparate()\n");
if (face != GL_FRONT && face != GL_BACK && face != GL_FRONT_AND_BACK) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glStencilaMaskSeparate(face)");
+ _mesa_error(ctx, GL_INVALID_ENUM, "glStencilFuncSeparate(face)");
return;
}
- FLUSH_VERTICES(ctx, _NEW_STENCIL);
+ if (!validate_stencil_func(ctx, func)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glStencilFuncSeparate(func)");
+ return;
+ }
+
+ stencil_func_separate(ctx, face, func, ref, mask);
+}
+
+
+static void
+stencil_mask_separate(struct gl_context *ctx, GLenum face, GLuint mask)
+{
+ FLUSH_VERTICES(ctx, ctx->DriverFlags.NewStencil ? 0 : _NEW_STENCIL);
+ ctx->NewDriverState |= ctx->DriverFlags.NewStencil;
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);
}
}
-/**
- * Update derived stencil state.
- */
-void
-_mesa_update_stencil(GLcontext *ctx)
+/* OpenGL 2.0 */
+void GLAPIENTRY
+_mesa_StencilMaskSeparate_no_error(GLenum face, GLuint mask)
{
- const GLint face = ctx->Stencil._BackFace;
-
- ctx->Stencil._Enabled = (ctx->Stencil.Enabled &&
- ctx->DrawBuffer->Visual.stencilBits > 0);
-
- ctx->Stencil._TestTwoSide =
- ctx->Stencil._Enabled &&
- (ctx->Stencil.Function[0] != ctx->Stencil.Function[face] ||
- ctx->Stencil.FailFunc[0] != ctx->Stencil.FailFunc[face] ||
- ctx->Stencil.ZPassFunc[0] != ctx->Stencil.ZPassFunc[face] ||
- ctx->Stencil.ZFailFunc[0] != ctx->Stencil.ZFailFunc[face] ||
- ctx->Stencil.Ref[0] != ctx->Stencil.Ref[face] ||
- ctx->Stencil.ValueMask[0] != ctx->Stencil.ValueMask[face] ||
- ctx->Stencil.WriteMask[0] != ctx->Stencil.WriteMask[face]);
+ GET_CURRENT_CONTEXT(ctx);
+ stencil_mask_separate(ctx, face, mask);
+}
+
+
+void GLAPIENTRY
+_mesa_StencilMaskSeparate(GLenum face, GLuint mask)
+{
+ GET_CURRENT_CONTEXT(ctx);
+
+ if (MESA_VERBOSE & VERBOSE_API)
+ _mesa_debug(ctx, "glStencilMaskSeparate()\n");
+
+ if (face != GL_FRONT && face != GL_BACK && face != GL_FRONT_AND_BACK) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glStencilaMaskSeparate(face)");
+ return;
+ }
+
+ stencil_mask_separate(ctx, face, mask);
}
*
* \param ctx GL context.
*
- * Initializes __GLcontextRec::Stencil attribute group.
+ * Initializes __struct gl_contextRec::Stencil attribute group.
*/
void
-_mesa_init_stencil(GLcontext *ctx)
+_mesa_init_stencil(struct gl_context *ctx)
{
ctx->Stencil.Enabled = GL_FALSE;
ctx->Stencil.TestTwoSide = GL_FALSE;
ctx->Stencil.Ref[0] = 0;
ctx->Stencil.Ref[1] = 0;
ctx->Stencil.Ref[2] = 0;
- ctx->Stencil.ValueMask[0] = ~0U;
- ctx->Stencil.ValueMask[1] = ~0U;
- ctx->Stencil.ValueMask[2] = ~0U;
- ctx->Stencil.WriteMask[0] = ~0U;
- ctx->Stencil.WriteMask[1] = ~0U;
- ctx->Stencil.WriteMask[2] = ~0U;
+
+ /* 4.1.4 Stencil Test section of the GL-ES 3.0 specification says:
+ *
+ * "In the initial state, [...] the front and back stencil mask are both
+ * set to the value 2^s − 1, where s is greater than or equal to the
+ * number of bits in the deepest stencil buffer* supported by the GL
+ * implementation."
+ *
+ * Since the maximum supported precision for stencil buffers is 8 bits,
+ * mask values should be initialized to 2^8 - 1 = 0xFF.
+ */
+ ctx->Stencil.ValueMask[0] = 0xFF;
+ ctx->Stencil.ValueMask[1] = 0xFF;
+ ctx->Stencil.ValueMask[2] = 0xFF;
+ ctx->Stencil.WriteMask[0] = 0xFF;
+ ctx->Stencil.WriteMask[1] = 0xFF;
+ ctx->Stencil.WriteMask[2] = 0xFF;
+
ctx->Stencil.Clear = 0;
ctx->Stencil._BackFace = 1;
}
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