GLfloat ShadowAmbient; /**< GL_ARB_shadow_ambient */
GLenum CompareMode; /**< GL_ARB_shadow */
GLenum CompareFunc; /**< GL_ARB_shadow */
+ GLenum _Function; /**< Comparison function derrived from
+ * \c CompareOperator, \c CompareMode, and
+ * \c CompareFunc.
+ */
GLenum DepthMode; /**< GL_ARB_depth_texture */
GLint _MaxLevel; /**< actual max mipmap level (q in the spec) */
GLfloat _MaxLambda; /**< = _MaxLevel - BaseLevel (q - b in spec) */
}
+/**
+ * Update derrived compare function state.
+ */
+void
+_mesa_update_texture_compare_function(struct gl_texture_object *tObj,
+ GLboolean in_frag_prog)
+{
+ if (in_frag_prog) {
+ tObj->_Function = GL_NONE;
+ }
+ else if (tObj->CompareFlag) {
+ /* GL_SGIX_shadow */
+ if (tObj->CompareOperator == GL_TEXTURE_LEQUAL_R_SGIX) {
+ tObj->_Function = GL_LEQUAL;
+ }
+ else {
+ ASSERT(tObj->CompareOperator == GL_TEXTURE_GEQUAL_R_SGIX);
+ tObj->_Function = GL_GEQUAL;
+ }
+ }
+ else if (tObj->CompareMode == GL_COMPARE_R_TO_TEXTURE_ARB) {
+ /* GL_ARB_shadow */
+ tObj->_Function = tObj->CompareFunc;
+ }
+ else {
+ tObj->_Function = GL_NONE; /* pass depth through as grayscale */
+ }
+}
+
+
void GLAPIENTRY
_mesa_TexParameterfv( GLenum target, GLenum pname, const GLfloat *params )
{
if (ctx->Extensions.SGIX_shadow) {
FLUSH_VERTICES(ctx, _NEW_TEXTURE);
texObj->CompareFlag = params[0] ? GL_TRUE : GL_FALSE;
+ _mesa_update_texture_compare_function(texObj, GL_FALSE);
}
else {
_mesa_error(ctx, GL_INVALID_ENUM,
op == GL_TEXTURE_GEQUAL_R_SGIX) {
FLUSH_VERTICES(ctx, _NEW_TEXTURE);
texObj->CompareOperator = op;
+ _mesa_update_texture_compare_function(texObj, GL_FALSE);
}
else {
_mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(param)");
if (mode == GL_NONE || mode == GL_COMPARE_R_TO_TEXTURE_ARB) {
FLUSH_VERTICES(ctx, _NEW_TEXTURE);
texObj->CompareMode = mode;
+ _mesa_update_texture_compare_function(texObj, GL_FALSE);
}
else {
_mesa_error(ctx, GL_INVALID_ENUM,
"glTexParameter(bad GL_TEXTURE_COMPARE_FUNC_ARB)");
return;
}
+
+ _mesa_update_texture_compare_function(texObj, GL_FALSE);
}
else {
_mesa_error(ctx, GL_INVALID_ENUM,
extern void
_mesa_print_texunit_state( GLcontext *ctx, GLuint unit );
+extern void
+_mesa_update_texture_compare_function(struct gl_texture_object *tObj,
+ GLboolean in_frag_prog);
+
/**
* \name Called from API
#include "colormac.h"
#include "context.h"
#include "prog_instruction.h"
+#include "texstate.h"
#include "s_fragprog.h"
#include "s_span.h"
_swrast_exec_fragment_program( GLcontext *ctx, SWspan *span )
{
const struct gl_fragment_program *program = ctx->FragmentProgram._Current;
+ GLuint i;
/* incoming colors should be floats */
if (program->Base.InputsRead & FRAG_BIT_COL0) {
ctx->_CurrentProgram = GL_FRAGMENT_PROGRAM_ARB; /* or NV, doesn't matter */
+ for (i = 0; i < ctx->Const.MaxTextureImageUnits; i++) {
+ if (ctx->Texture.Unit[i]._Current != NULL) {
+ _mesa_update_texture_compare_function(ctx->Texture.Unit[i]._Current,
+ GL_TRUE);
+ }
+ }
+
run_program(ctx, span, 0, span->end);
+ for (i = 0; i < ctx->Const.MaxTextureImageUnits; i++) {
+ if (ctx->Texture.Unit[i]._Current != NULL) {
+ _mesa_update_texture_compare_function(ctx->Texture.Unit[i]._Current,
+ GL_FALSE);
+ }
+ }
+
if (program->Base.OutputsWritten & (1 << FRAG_RESULT_COLR)) {
span->interpMask &= ~SPAN_RGBA;
span->arrayMask |= SPAN_RGBA;
/* XXXX if tObj->MinFilter != tObj->MagFilter, we're ignoring lambda */
- /* XXX this could be precomputed and saved in the texture object */
- if (tObj->CompareFlag) {
- /* GL_SGIX_shadow */
- if (tObj->CompareOperator == GL_TEXTURE_LEQUAL_R_SGIX) {
- function = GL_LEQUAL;
- }
- else {
- ASSERT(tObj->CompareOperator == GL_TEXTURE_GEQUAL_R_SGIX);
- function = GL_GEQUAL;
- }
- }
- else if (tObj->CompareMode == GL_COMPARE_R_TO_TEXTURE_ARB) {
- /* GL_ARB_shadow */
- function = tObj->CompareFunc;
- }
- else {
- function = GL_NONE; /* pass depth through as grayscale */
- }
-
+ function = tObj->_Function;
if (tObj->MagFilter == GL_NEAREST) {
GLuint i;
for (i = 0; i < n; i++) {