/**
* \note This routine refers to derived texture matrix values to
* compute the ENABLE_TEXMAT flags, but is only called on
* _NEW_TEXTURE_OBJECT/STATE. On changes to _NEW_TEXTURE_MATRIX,
* the ENABLE_TEXMAT flags are updated by _mesa_update_texture_matrices,
* above.
*
* \param ctx GL context.
*/
void
_mesa_update_texture_state(struct gl_context *ctx)
{
struct gl_program *prog[MESA_SHADER_STAGES];
int i;
int old_max_unit = ctx->Texture._MaxEnabledTexImageUnit;
BITSET_DECLARE(enabled_texture_units, MAX_COMBINED_TEXTURE_IMAGE_UNITS);
memcpy(prog, ctx->_Shader->CurrentProgram, sizeof(prog));
if (prog[MESA_SHADER_FRAGMENT] == NULL &&
_mesa_arb_fragment_program_enabled(ctx)) {
prog[MESA_SHADER_FRAGMENT] = ctx->FragmentProgram.Current;
}
/* TODO: only set this if there are actual changes */
ctx->NewState |= _NEW_TEXTURE_OBJECT | _NEW_TEXTURE_STATE;
ctx->Texture._GenFlags = 0x0;
ctx->Texture._TexMatEnabled = 0x0;
ctx->Texture._TexGenEnabled = 0x0;
ctx->Texture._MaxEnabledTexImageUnit = -1;
ctx->Texture._EnabledCoordUnits = 0x0;
memset(&enabled_texture_units, 0, sizeof(enabled_texture_units));
/* First, walk over our programs pulling in all the textures for them.
* Programs dictate specific texture targets to be enabled, and for a draw
* call to be valid they can't conflict about which texture targets are
* used.
*/
update_program_texture_state(ctx, prog, enabled_texture_units);
/* Also pull in any textures necessary for fixed function fragment shading.
*/
if (!prog[MESA_SHADER_FRAGMENT])
update_ff_texture_state(ctx, enabled_texture_units);
/* Now, clear out the _Current of any disabled texture units. */
for (i = 0; i <= ctx->Texture._MaxEnabledTexImageUnit; i++) {
if (!BITSET_TEST(enabled_texture_units, i))
_mesa_reference_texobj(&ctx->Texture.Unit[i]._Current, NULL);
}
for (i = ctx->Texture._MaxEnabledTexImageUnit + 1; i <= old_max_unit; i++) {
_mesa_reference_texobj(&ctx->Texture.Unit[i]._Current, NULL);
}
/* add fallback texture for SampleMapATI if there is nothing */
if (_mesa_ati_fragment_shader_enabled(ctx) &&
ctx->ATIFragmentShader.Current->Program)
fix_missing_textures_for_atifs(ctx,
ctx->ATIFragmentShader.Current->Program,
enabled_texture_units);
if (!prog[MESA_SHADER_FRAGMENT] || !prog[MESA_SHADER_VERTEX])
update_texgen(ctx);
}
/**
* \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.
*
* \param ctx GL context.
*/
static void
update_texture_state( struct gl_context *ctx )
{
struct gl_program *prog[MESA_SHADER_STAGES];
int i;
int old_max_unit = ctx->Texture._MaxEnabledTexImageUnit;
BITSET_DECLARE(enabled_texture_units, MAX_COMBINED_TEXTURE_IMAGE_UNITS);
for (i = 0; i < MESA_SHADER_STAGES; i++) {
if (ctx->_Shader->CurrentProgram[i] &&
ctx->_Shader->CurrentProgram[i]->LinkStatus) {
prog[i] = ctx->_Shader->CurrentProgram[i]->_LinkedShaders[i]->Program;
} else {
if (i == MESA_SHADER_FRAGMENT && ctx->FragmentProgram._Enabled)
prog[i] = &ctx->FragmentProgram.Current->Base;
else
prog[i] = NULL;
}
}
/* TODO: only set this if there are actual changes */
ctx->NewState |= _NEW_TEXTURE;
ctx->Texture._GenFlags = 0x0;
ctx->Texture._TexMatEnabled = 0x0;
ctx->Texture._TexGenEnabled = 0x0;
ctx->Texture._MaxEnabledTexImageUnit = -1;
ctx->Texture._EnabledCoordUnits = 0x0;
memset(&enabled_texture_units, 0, sizeof(enabled_texture_units));
/* First, walk over our programs pulling in all the textures for them.
* Programs dictate specific texture targets to be enabled, and for a draw
* call to be valid they can't conflict about which texture targets are
* used.
*/
update_program_texture_state(ctx, prog, enabled_texture_units);
/* Also pull in any textures necessary for fixed function fragment shading.
*/
if (!prog[MESA_SHADER_FRAGMENT])
update_ff_texture_state(ctx, enabled_texture_units);
/* Now, clear out the _Current of any disabled texture units. */
for (i = 0; i <= ctx->Texture._MaxEnabledTexImageUnit; i++) {
if (!BITSET_TEST(enabled_texture_units, i))
_mesa_reference_texobj(&ctx->Texture.Unit[i]._Current, NULL);
}
for (i = ctx->Texture._MaxEnabledTexImageUnit + 1; i <= old_max_unit; i++) {
_mesa_reference_texobj(&ctx->Texture.Unit[i]._Current, NULL);
}
if (!prog[MESA_SHADER_FRAGMENT] || !prog[MESA_SHADER_VERTEX])
update_texgen(ctx);
}
