static void
update_texgen(struct gl_context *ctx)
{
GLuint unit;
/* Setup texgen for those texture coordinate sets that are in use */
for (unit = 0; unit < ctx->Const.MaxTextureCoordUnits; unit++) {
struct gl_fixedfunc_texture_unit *texUnit =
&ctx->Texture.FixedFuncUnit[unit];
texUnit->_GenFlags = 0x0;
if (!(ctx->Texture._EnabledCoordUnits & (1 << unit)))
continue;
if (texUnit->TexGenEnabled) {
if (texUnit->TexGenEnabled & S_BIT) {
texUnit->_GenFlags |= texUnit->GenS._ModeBit;
}
if (texUnit->TexGenEnabled & T_BIT) {
texUnit->_GenFlags |= texUnit->GenT._ModeBit;
}
if (texUnit->TexGenEnabled & R_BIT) {
texUnit->_GenFlags |= texUnit->GenR._ModeBit;
}
if (texUnit->TexGenEnabled & Q_BIT) {
texUnit->_GenFlags |= texUnit->GenQ._ModeBit;
}
ctx->Texture._TexGenEnabled |= ENABLE_TEXGEN(unit);
ctx->Texture._GenFlags |= texUnit->_GenFlags;
}
assert(unit < ARRAY_SIZE(ctx->TextureMatrixStack));
if (ctx->TextureMatrixStack[unit].Top->type != MATRIX_IDENTITY)
ctx->Texture._TexMatEnabled |= ENABLE_TEXMAT(unit);
}
}
/* Note: This routine refers to derived texture matrix values to
* compute the ENABLE_TEXMAT flags, but is only called on
* _NEW_TEXTURE. On changes to _NEW_TEXTURE_MATRIX, the ENABLE_TEXMAT
* flags are updated by _mesa_update_texture_matrices, above.
*
* If both TEXTURE and TEXTURE_MATRIX change at once, these values
* will be computed twice.
*/
static void
update_texture_state( GLcontext *ctx )
{
GLuint i;
ctx->Texture._ReallyEnabled = 0;
ctx->Texture._GenFlags = 0;
ctx->_NeedNormals &= ~NEED_NORMALS_TEXGEN;
ctx->_NeedEyeCoords &= ~NEED_EYE_TEXGEN;
ctx->Texture._TexMatEnabled = 0;
ctx->Texture._TexGenEnabled = 0;
/* Update texture unit state.
*/
for (i=0; i < ctx->Const.MaxTextureUnits; i++) {
struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i];
texUnit->_ReallyEnabled = 0;
texUnit->_GenFlags = 0;
if (!texUnit->Enabled)
continue;
/* Find the texture of highest dimensionality that is enabled
* and complete. We'll use it for texturing.
*/
if (texUnit->Enabled & TEXTURE0_CUBE) {
struct gl_texture_object *texObj = texUnit->CurrentCubeMap;
if (!texObj->Complete) {
_mesa_test_texobj_completeness(ctx, texObj);
}
if (texObj->Complete) {
texUnit->_ReallyEnabled = TEXTURE0_CUBE;
texUnit->_Current = texObj;
}
}
if (!texUnit->_ReallyEnabled && (texUnit->Enabled & TEXTURE0_3D)) {
struct gl_texture_object *texObj = texUnit->Current3D;
if (!texObj->Complete) {
_mesa_test_texobj_completeness(ctx, texObj);
}
if (texObj->Complete) {
texUnit->_ReallyEnabled = TEXTURE0_3D;
texUnit->_Current = texObj;
}
}
if (!texUnit->_ReallyEnabled && (texUnit->Enabled & TEXTURE0_RECT)) {
struct gl_texture_object *texObj = texUnit->CurrentRect;
if (!texObj->Complete) {
_mesa_test_texobj_completeness(ctx, texObj);
}
if (texObj->Complete) {
texUnit->_ReallyEnabled = TEXTURE0_RECT;
texUnit->_Current = texObj;
}
}
if (!texUnit->_ReallyEnabled && (texUnit->Enabled & TEXTURE0_2D)) {
struct gl_texture_object *texObj = texUnit->Current2D;
if (!texObj->Complete) {
_mesa_test_texobj_completeness(ctx, texObj);
}
if (texObj->Complete) {
texUnit->_ReallyEnabled = TEXTURE0_2D;
texUnit->_Current = texObj;
}
}
if (!texUnit->_ReallyEnabled && (texUnit->Enabled & TEXTURE0_1D)) {
struct gl_texture_object *texObj = texUnit->Current1D;
if (!texObj->Complete) {
_mesa_test_texobj_completeness(ctx, texObj);
}
if (texObj->Complete) {
texUnit->_ReallyEnabled = TEXTURE0_1D;
texUnit->_Current = texObj;
}
}
if (!texUnit->_ReallyEnabled) {
texUnit->_Current = NULL;
continue;
}
{
GLuint flag = texUnit->_ReallyEnabled << (i * NUM_TEXTURE_TARGETS);
ctx->Texture._ReallyEnabled |= flag;
}
if (texUnit->TexGenEnabled) {
if (texUnit->TexGenEnabled & S_BIT) {
texUnit->_GenFlags |= texUnit->_GenBitS;
}
if (texUnit->TexGenEnabled & T_BIT) {
texUnit->_GenFlags |= texUnit->_GenBitT;
}
if (texUnit->TexGenEnabled & Q_BIT) {
texUnit->_GenFlags |= texUnit->_GenBitQ;
}
if (texUnit->TexGenEnabled & R_BIT) {
texUnit->_GenFlags |= texUnit->_GenBitR;
}
ctx->Texture._TexGenEnabled |= ENABLE_TEXGEN(i);
ctx->Texture._GenFlags |= texUnit->_GenFlags;
}
if (ctx->TextureMatrix[i].type != MATRIX_IDENTITY)
ctx->Texture._TexMatEnabled |= ENABLE_TEXMAT(i);
}
if (ctx->Texture._GenFlags & TEXGEN_NEED_NORMALS) {
ctx->_NeedNormals |= NEED_NORMALS_TEXGEN;
ctx->_NeedEyeCoords |= NEED_EYE_TEXGEN;
}
if (ctx->Texture._GenFlags & TEXGEN_NEED_EYE_COORD) {
ctx->_NeedEyeCoords |= NEED_EYE_TEXGEN;
}
}